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SPDX-License-Identifier: CC-BY-2.0-UK + +*********************** +Manual Revision History +*********************** + +.. list-table:: + :widths: 10 15 40 + :header-rows: 1 + + * - Revision + - Date + - Note + * - 3.2 + - October 2020 + - The initial document released with the Yocto Project 3.2 Release diff --git a/poky/documentation/test-manual/test-manual-customization.xsl b/poky/documentation/test-manual/test-manual-customization.xsl new file mode 100644 index 000000000..17bf57c2d --- /dev/null +++ b/poky/documentation/test-manual/test-manual-customization.xsl @@ -0,0 +1,29 @@ +<?xml version='1.0'?> +<!--SPDX-License-Identifier: CC-BY-2.0-UK--> + +<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns="http://www.w3.org/1999/xhtml" xmlns:fo="http://www.w3.org/1999/XSL/Format" version="1.0"> + + <xsl:import href="http://downloads.yoctoproject.org/mirror/docbook-mirror/docbook-xsl-1.76.1/xhtml/docbook.xsl" /> + +<!-- + + <xsl:import href="../template/1.76.1/docbook-xsl-1.76.1/xhtml/docbook.xsl" /> + + <xsl:import href="http://docbook.sourceforge.net/release/xsl/1.76.1/xhtml/docbook.xsl" /> + +--> + + <xsl:include href="../template/permalinks.xsl"/> + <xsl:include href="../template/section.title.xsl"/> + <xsl:include href="../template/component.title.xsl"/> + <xsl:include href="../template/division.title.xsl"/> + <xsl:include href="../template/formal.object.heading.xsl"/> + + <xsl:param name="html.stylesheet" select="'test-manual-style.css'" /> + <xsl:param name="chapter.autolabel" select="1" /> + <xsl:param name="appendix.autolabel" select="A" /> + <xsl:param name="section.autolabel" select="1" /> + <xsl:param name="section.label.includes.component.label" select="1" /> + <xsl:param name="generate.id.attributes" select="1" /> + +</xsl:stylesheet> diff --git a/poky/documentation/test-manual/test-manual-intro.rst b/poky/documentation/test-manual/test-manual-intro.rst new file mode 100644 index 000000000..53ad650b3 --- /dev/null +++ b/poky/documentation/test-manual/test-manual-intro.rst @@ -0,0 +1,550 @@ +.. SPDX-License-Identifier: CC-BY-2.0-UK + +***************************************** +The Yocto Project Test Environment Manual +***************************************** + +.. _test-welcome: + +Welcome +======= + +Welcome to the Yocto Project Test Environment Manual! This manual is a +work in progress. The manual contains information about the testing +environment used by the Yocto Project to make sure each major and minor +release works as intended. All the project's testing infrastructure and +processes are publicly visible and available so that the community can +see what testing is being performed, how it's being done and the current +status of the tests and the project at any given time. It is intended +that Other organizations can leverage off the process and testing +environment used by the Yocto Project to create their own automated, +production test environment, building upon the foundations from the +project core. + +Currently, the Yocto Project Test Environment Manual has no projected +release date. This manual is a work-in-progress and is being initially +loaded with information from the README files and notes from key +engineers: + +- *yocto-autobuilder2:* This + :yocto_git:`README.md </cgit.cgi/yocto-autobuilder2/tree/README.md>` + is the main README which detials how to set up the Yocto Project + Autobuilder. The ``yocto-autobuilder2`` repository represents the + Yocto Project's console UI plugin to Buildbot and the configuration + necessary to configure Buildbot to perform the testing the project + requires. + +- *yocto-autobuilder-helper:* This :yocto_git:`README </cgit.cgi/yocto-autobuilder-helper/tree/README/>` + and repository contains Yocto Project Autobuilder Helper scripts and + configuration. The ``yocto-autobuilder-helper`` repository contains + the "glue" logic that defines which tests to run and how to run them. + As a result, it can be used by any Continuous Improvement (CI) system + to run builds, support getting the correct code revisions, configure + builds and layers, run builds, and collect results. The code is + independent of any CI system, which means the code can work `Buildbot <https://docs.buildbot.net/0.9.15.post1/>`__, + Jenkins, or others. This repository has a branch per release of the + project defining the tests to run on a per release basis. + +.. _test-yocto-project-autobuilder-overview: + +Yocto Project Autobuilder Overview +================================== + +The Yocto Project Autobuilder collectively refers to the software, +tools, scripts, and procedures used by the Yocto Project to test +released software across supported hardware in an automated and regular +fashion. Basically, during the development of a Yocto Project release, +the Autobuilder tests if things work. The Autobuilder builds all test +targets and runs all the tests. + +The Yocto Project uses now uses standard upstream +`Buildbot <https://docs.buildbot.net/0.9.15.post1/>`__ (version 9) to +drive its integration and testing. Buildbot Nine has a plug-in interface +that the Yocto Project customizes using code from the +``yocto-autobuilder2`` repository, adding its own console UI plugin. The +resulting UI plug-in allows you to visualize builds in a way suited to +the project's needs. + +A ``helper`` layer provides configuration and job management through +scripts found in the ``yocto-autobuilder-helper`` repository. The +``helper`` layer contains the bulk of the build configuration +information and is release-specific, which makes it highly customizable +on a per-project basis. The layer is CI system-agnostic and contains a +number of Helper scripts that can generate build configurations from +simple JSON files. + +.. note:: + + The project uses Buildbot for historical reasons but also because + many of the project developers have knowledge of python. It is + possible to use the outer layers from another Continuous Integration + (CI) system such as + `Jenkins <https://en.wikipedia.org/wiki/Jenkins_(software)>`__ + instead of Buildbot. + +The following figure shows the Yocto Project Autobuilder stack with a +topology that includes a controller and a cluster of workers: + +.. image:: figures/ab-test-cluster.png + :align: center + +.. _test-project-tests: + +Yocto Project Tests - Types of Testing Overview +=============================================== + +The Autobuilder tests different elements of the project by using +thefollowing types of tests: + +- *Build Testing:* Tests whether specific configurations build by + varying :term:`MACHINE`, + :term:`DISTRO`, other configuration + options, and the specific target images being built (or world). Used + to trigger builds of all the different test configurations on the + Autobuilder. Builds usually cover many different targets for + different architectures, machines, and distributions, as well as + different configurations, such as different init systems. The + Autobuilder tests literally hundreds of configurations and targets. + + - *Sanity Checks During the Build Process:* Tests initiated through + the :ref:`insane <ref-classes-insane>` + class. These checks ensure the output of the builds are correct. + For example, does the ELF architecture in the generated binaries + match the target system? ARM binaries would not work in a MIPS + system! + +- *Build Performance Testing:* Tests whether or not commonly used steps + during builds work efficiently and avoid regressions. Tests to time + commonly used usage scenarios are run through ``oe-build-perf-test``. + These tests are run on isolated machines so that the time + measurements of the tests are accurate and no other processes + interfere with the timing results. The project currently tests + performance on two different distributions, Fedora and Ubuntu, to + ensure we have no single point of failure and can ensure the + different distros work effectively. + +- *eSDK Testing:* Image tests initiated through the following command:: + + $ bitbake image -c testsdkext + + The tests utilize the ``testsdkext`` class and the ``do_testsdkext`` task. + +- *Feature Testing:* Various scenario-based tests are run through the + :ref:`OpenEmbedded Self test (oe-selftest) <ref-manual/ref-release-process:Testing and Quality Assurance>`. We test oe-selftest on each of the main distrubutions + we support. + +- *Image Testing:* Image tests initiated through the following command:: + + $ bitbake image -c testimage + + The tests utilize the :ref:`testimage* <ref-classes-testimage*>` + classes and the :ref:`ref-tasks-testimage` task. + +- *Layer Testing:* The Autobuilder has the possibility to test whether + specific layers work with the test of the system. The layers tested + may be selected by members of the project. Some key community layers + are also tested periodically. + +- *Package Testing:* A Package Test (ptest) runs tests against packages + built by the OpenEmbedded build system on the target machine. See the + :ref:`Testing Packages With + ptest <dev-manual/dev-manual-common-tasks:Testing Packages With ptest>` section + in the Yocto Project Development Tasks Manual and the + ":yocto_wiki:`Ptest </wiki/Ptest>`" Wiki page for more + information on Ptest. + +- *SDK Testing:* Image tests initiated through the following command:: + + $ bitbake image -c testsdk + + The tests utilize the :ref:`testsdk <ref-classes-testsdk>` class and + the ``do_testsdk`` task. + +- *Unit Testing:* Unit tests on various components of the system run + through :ref:`bitbake-selftest <ref-manual/ref-release-process:Testing and Quality Assurance>` and + :ref:`oe-selftest <ref-manual/ref-release-process:Testing and Quality Assurance>`. + +- *Automatic Upgrade Helper:* This target tests whether new versions of + software are available and whether we can automatically upgrade to + those new versions. If so, this target emails the maintainers with a + patch to let them know this is possible. + +.. _test-test-mapping: + +How Tests Map to Areas of Code +============================== + +Tests map into the codebase as follows: + +- *bitbake-selftest:* + + These tests are self-contained and test BitBake as well as its APIs, + which include the fetchers. The tests are located in + ``bitbake/lib/*/tests``. + + From within the BitBake repository, run the following:: + + $ bitbake-selftest + + To skip tests that access the Internet, use the ``BB_SKIP_NETTEST`` + variable when running "bitbake-selftest" as follows:: + + $ BB_SKIP_NETTEST=yes bitbake-selftest + + The default output is quiet and just prints a summary of what was + run. To see more information, there is a verbose option:: + + $ bitbake-selftest -v + + Use this option when you wish to skip tests that access the network, + which are mostly necessary to test the fetcher modules. To specify + individual test modules to run, append the test module name to the + "bitbake-selftest" command. For example, to specify the tests for the + bb.data.module, run:: + + $ bitbake-selftest bb.test.data.module + + You can also specify individual tests by defining the full name and module + plus the class path of the test, for example:: + + $ bitbake-selftest bb.tests.data.TestOverrides.test_one_override + + The tests are based on `Python + unittest <https://docs.python.org/3/library/unittest.html>`__. + +- *oe-selftest:* + + - These tests use OE to test the workflows, which include testing + specific features, behaviors of tasks, and API unit tests. + + - The tests can take advantage of parallelism through the "-j" + option, which can specify a number of threads to spread the tests + across. Note that all tests from a given class of tests will run + in the same thread. To parallelize large numbers of tests you can + split the class into multiple units. + + - The tests are based on Python unittest. + + - The code for the tests resides in + ``meta/lib/oeqa/selftest/cases/``. + + - To run all the tests, enter the following command:: + + $ oe-selftest -a + + - To run a specific test, use the following command form where + testname is the name of the specific test:: + + $ oe-selftest -r <testname> + + For example, the following command would run the tinfoil + getVar API test:: + + $ oe-selftest -r tinfoil.TinfoilTests.test_getvar + + It is also possible to run a set + of tests. For example the following command will run all of the + tinfoil tests:: + + $ oe-selftest -r tinfoil + +- *testimage:* + + - These tests build an image, boot it, and run tests against the + image's content. + + - The code for these tests resides in ``meta/lib/oeqa/runtime/cases/``. + + - You need to set the :term:`IMAGE_CLASSES` variable as follows:: + + IMAGE_CLASSES += "testimage" + + - Run the tests using the following command form:: + + $ bitbake image -c testimage + +- *testsdk:* + + - These tests build an SDK, install it, and then run tests against + that SDK. + + - The code for these tests resides in ``meta/lib/oeqa/sdk/cases/``. + + - Run the test using the following command form:: + + $ bitbake image -c testsdk + +- *testsdk_ext:* + + - These tests build an extended SDK (eSDK), install that eSDK, and + run tests against the eSDK. + + - The code for these tests resides in ``meta/lib/oeqa/esdk``. + + - To run the tests, use the following command form:: + + $ bitbake image -c testsdkext + +- *oe-build-perf-test:* + + - These tests run through commonly used usage scenarios and measure + the performance times. + + - The code for these tests resides in ``meta/lib/oeqa/buildperf``. + + - To run the tests, use the following command form:: + + $ oe-build-perf-test <options> + + The command takes a number of options, + such as where to place the test results. The Autobuilder Helper + Scripts include the ``build-perf-test-wrapper`` script with + examples of how to use the oe-build-perf-test from the command + line. + + Use the ``oe-git-archive`` command to store test results into a + Git repository. + + Use the ``oe-build-perf-report`` command to generate text reports + and HTML reports with graphs of the performance data. For + examples, see + :yocto_dl:`/releases/yocto/yocto-2.7/testresults/buildperf-centos7/perf-centos7.yoctoproject.org_warrior_20190414204758_0e39202.html` + and + :yocto_dl:`/releases/yocto/yocto-2.7/testresults/buildperf-centos7/perf-centos7.yoctoproject.org_warrior_20190414204758_0e39202.txt`. + + - The tests are contained in ``lib/oeqa/buildperf/test_basic.py``. + +Test Examples +============= + +This section provides example tests for each of the tests listed in the +:ref:`test-manual/test-manual-intro:How Tests Map to Areas of Code` section. + +For oeqa tests, testcases for each area reside in the main test +directory at ``meta/lib/oeqa/selftest/cases`` directory. + +For oe-selftest. bitbake testcases reside in the ``lib/bb/tests/`` +directory. + +.. _bitbake-selftest-example: + +``bitbake-selftest`` +-------------------- + +A simple test example from ``lib/bb/tests/data.py`` is:: + + class DataExpansions(unittest.TestCase): + def setUp(self): + self.d = bb.data.init() + self.d["foo"] = "value_of_foo" + self.d["bar"] = "value_of_bar" + self.d["value_of_foo"] = "value_of_'value_of_foo'" + + def test_one_var(self): + val = self.d.expand("${foo}") + self.assertEqual(str(val), "value_of_foo") + +In this example, a ``DataExpansions`` class of tests is created, +derived from standard python unittest. The class has a common ``setUp`` +function which is shared by all the tests in the class. A simple test is +then added to test that when a variable is expanded, the correct value +is found. + +Bitbake selftests are straightforward python unittest. Refer to the +Python unittest documentation for additional information on writing +these tests at: https://docs.python.org/3/library/unittest.html. + +.. _oe-selftest-example: + +``oe-selftest`` +--------------- + +These tests are more complex due to the setup required behind the scenes +for full builds. Rather than directly using Python's unittest, the code +wraps most of the standard objects. The tests can be simple, such as +testing a command from within the OE build environment using the +following example:: + + class BitbakeLayers(OESelftestTestCase): + def test_bitbakelayers_showcrossdepends(self): + result = runCmd('bitbake-layers show-cross-depends') + self.assertTrue('aspell' in result.output, msg = "No dependencies were shown. bitbake-layers show-cross-depends output: %s"% result.output) + +This example, taken from ``meta/lib/oeqa/selftest/cases/bblayers.py``, +creates a testcase from the ``OESelftestTestCase`` class, derived +from ``unittest.TestCase``, which runs the ``bitbake-layers`` command +and checks the output to ensure it contains something we know should be +here. + +The ``oeqa.utils.commands`` module contains Helpers which can assist +with common tasks, including: + +- *Obtaining the value of a bitbake variable:* Use + ``oeqa.utils.commands.get_bb_var()`` or use + ``oeqa.utils.commands.get_bb_vars()`` for more than one variable + +- *Running a bitbake invocation for a build:* Use + ``oeqa.utils.commands.bitbake()`` + +- *Running a command:* Use ``oeqa.utils.commandsrunCmd()`` + +There is also a ``oeqa.utils.commands.runqemu()`` function for launching +the ``runqemu`` command for testing things within a running, virtualized +image. + +You can run these tests in parallel. Parallelism works per test class, +so tests within a given test class should always run in the same build, +while tests in different classes or modules may be split into different +builds. There is no data store available for these tests since the tests +launch the ``bitbake`` command and exist outside of its context. As a +result, common bitbake library functions (bb.\*) are also unavailable. + +.. _testimage-example: + +``testimage`` +------------- + +These tests are run once an image is up and running, either on target +hardware or under QEMU. As a result, they are assumed to be running in a +target image environment, as opposed to a host build environment. A +simple example from ``meta/lib/oeqa/runtime/cases/python.py`` contains +the following:: + + class PythonTest(OERuntimeTestCase): + @OETestDepends(['ssh.SSHTest.test_ssh']) + @OEHasPackage(['python3-core']) + def test_python3(self): + cmd = "python3 -c \\"import codecs; print(codecs.encode('Uryyb, jbeyq', 'rot13'))\"" + status, output = self.target.run(cmd) + msg = 'Exit status was not 0. Output: %s' % output + self.assertEqual(status, 0, msg=msg) + +In this example, the ``OERuntimeTestCase`` class wraps +``unittest.TestCase``. Within the test, ``self.target`` represents the +target system, where commands can be run on it using the ``run()`` +method. + +To ensure certain test or package dependencies are met, you can use the +``OETestDepends`` and ``OEHasPackage`` decorators. For example, the test +in this example would only make sense if python3-core is installed in +the image. + +.. _testsdk_ext-example: + +``testsdk_ext`` +--------------- + +These tests are run against built extensible SDKs (eSDKs). The tests can +assume that the eSDK environment has already been setup. An example from +``meta/lib/oeqa/sdk/cases/devtool.py`` contains the following:: + + class DevtoolTest(OESDKExtTestCase): + @classmethod def setUpClass(cls): + myapp_src = os.path.join(cls.tc.esdk_files_dir, "myapp") + cls.myapp_dst = os.path.join(cls.tc.sdk_dir, "myapp") + shutil.copytree(myapp_src, cls.myapp_dst) + subprocess.check_output(['git', 'init', '.'], cwd=cls.myapp_dst) + subprocess.check_output(['git', 'add', '.'], cwd=cls.myapp_dst) + subprocess.check_output(['git', 'commit', '-m', "'test commit'"], cwd=cls.myapp_dst) + + @classmethod + def tearDownClass(cls): + shutil.rmtree(cls.myapp_dst) + def _test_devtool_build(self, directory): + self._run('devtool add myapp %s' % directory) + try: + self._run('devtool build myapp') + finally: + self._run('devtool reset myapp') + def test_devtool_build_make(self): + self._test_devtool_build(self.myapp_dst) + +In this example, the ``devtool`` +command is tested to see whether a sample application can be built with +the ``devtool build`` command within the eSDK. + +.. _testsdk-example: + +``testsdk`` +----------- + +These tests are run against built SDKs. The tests can assume that an SDK +has already been extracted and its environment file has been sourced. A +simple example from ``meta/lib/oeqa/sdk/cases/python2.py`` contains the +following:: + + class Python3Test(OESDKTestCase): + def setUp(self): + if not (self.tc.hasHostPackage("nativesdk-python3-core") or + self.tc.hasHostPackage("python3-core-native")): + raise unittest.SkipTest("No python3 package in the SDK") + + def test_python3(self): + cmd = "python3 -c \\"import codecs; print(codecs.encode('Uryyb, jbeyq', 'rot13'))\"" + output = self._run(cmd) + self.assertEqual(output, "Hello, world\n") + +In this example, if nativesdk-python3-core has been installed into the SDK, the code runs +the python3 interpreter with a basic command to check it is working +correctly. The test would only run if python3 is installed in the SDK. + +.. _oe-build-perf-test-example: + +``oe-build-perf-test`` +---------------------- + +The performance tests usually measure how long operations take and the +resource utilisation as that happens. An example from +``meta/lib/oeqa/buildperf/test_basic.py`` contains the following:: + + class Test3(BuildPerfTestCase): + def test3(self): + """Bitbake parsing (bitbake -p)""" + # Drop all caches and parse + self.rm_cache() + oe.path.remove(os.path.join(self.bb_vars['TMPDIR'], 'cache'), True) + self.measure_cmd_resources(['bitbake', '-p'], 'parse_1', + 'bitbake -p (no caches)') + # Drop tmp/cache + oe.path.remove(os.path.join(self.bb_vars['TMPDIR'], 'cache'), True) + self.measure_cmd_resources(['bitbake', '-p'], 'parse_2', + 'bitbake -p (no tmp/cache)') + # Parse with fully cached data + self.measure_cmd_resources(['bitbake', '-p'], 'parse_3', + 'bitbake -p (cached)') + +This example shows how three specific parsing timings are +measured, with and without various caches, to show how BitBake's parsing +performance trends over time. + +.. _test-writing-considerations: + +Considerations When Writing Tests +================================= + +When writing good tests, there are several things to keep in mind. Since +things running on the Autobuilder are accessed concurrently by multiple +workers, consider the following: + +**Running "cleanall" is not permitted.** + +This can delete files from DL_DIR which would potentially break other +builds running in parallel. If this is required, DL_DIR must be set to +an isolated directory. + +**Running "cleansstate" is not permitted.** + +This can delete files from SSTATE_DIR which would potentially break +other builds running in parallel. If this is required, SSTATE_DIR must +be set to an isolated directory. Alternatively, you can use the "-f" +option with the ``bitbake`` command to "taint" tasks by changing the +sstate checksums to ensure sstate cache items will not be reused. + +**Tests should not change the metadata.** + +This is particularly true for oe-selftests since these can run in +parallel and changing metadata leads to changing checksums, which +confuses BitBake while running in parallel. If this is necessary, copy +layers to a temporary location and modify them. Some tests need to +change metadata, such as the devtool tests. To prevent the metadate from +changes, set up temporary copies of that data first. diff --git a/poky/documentation/test-manual/test-manual-intro.xml b/poky/documentation/test-manual/test-manual-intro.xml new file mode 100644 index 000000000..0cdbee4d8 --- /dev/null +++ b/poky/documentation/test-manual/test-manual-intro.xml @@ -0,0 +1,624 @@ +<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" +"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" +[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] > +<!--SPDX-License-Identifier: CC-BY-2.0-UK--> + +<chapter id='test-manual-intro'> + +<title>The Yocto Project Test Environment Manual</title> + <section id='test-welcome'> + <title>Welcome</title> + + <para> Welcome to the Yocto Project Test Environment Manual! This manual is a work in + progress. The manual contains information about the testing environment used by the + Yocto Project to make sure each major and minor release works as intended. All the + project's testing infrastructure and processes are publicly visible and available so + that the community can see what testing is being performed, how it's being done and the + current status of the tests and the project at any given time. It is intended that Other + organizations can leverage off the process and testing environment used by the Yocto + Project to create their own automated, production test environment, building upon the + foundations from the project core. </para> + + <para> Currently, the Yocto Project Test Environment Manual has no projected release date. + This manual is a work-in-progress and is being initially loaded with information from + the <ulink url="">README</ulink> files and notes from key engineers: <itemizedlist> + <listitem> + <para> + <emphasis><filename>yocto-autobuilder2</filename>:</emphasis> This <ulink + url="http://git.yoctoproject.org/clean/cgit.cgi/yocto-autobuilder2/tree/README.md" + ><filename>README.md</filename></ulink> is the main README which + detials how to set up the Yocto Project Autobuilder. The + <filename>yocto-autobuilder2</filename> repository represents the Yocto + Project's console UI plugin to Buildbot and the configuration necessary to + configure Buildbot to perform the testing the project requires. </para> + </listitem> + <listitem> + <para> + <emphasis><filename>yocto-autobuilder-helper</filename>:</emphasis> This + <ulink + url="http://git.yoctoproject.org/clean/cgit.cgi/yocto-autobuilder-helper/tree/README" + ><filename>README</filename></ulink> and repository contains Yocto + Project Autobuilder Helper scripts and configuration. The + <filename>yocto-autobuilder-helper</filename> repository contains the + "glue" logic that defines which tests to run and how to run them. As a + result, it can be used by any Continuous Improvement (CI) system to run + builds, support getting the correct code revisions, configure builds and + layers, run builds, and collect results. The code is independent of any CI + system, which means the code can work Buildbot, Jenkins, or others. This + repository has a branch per release of the project defining the tests to run + on a per release basis.</para> + </listitem> + </itemizedlist> + </para> + </section> + + <section id='test-yocto-project-autobuilder-overview'> + <title>Yocto Project Autobuilder Overview</title> + + <para>The Yocto Project Autobuilder collectively refers to the software, tools, scripts, and + procedures used by the Yocto Project to test released software across supported hardware + in an automated and regular fashion. Basically, during the development of a Yocto + Project release, the Autobuilder tests if things work. The Autobuilder builds all test + targets and runs all the tests. </para> + + <para>The Yocto Project uses now uses standard upstream <ulink + url="https://docs.buildbot.net/0.9.15.post1/">Buildbot</ulink> (version 9) to drive + its integration and testing. Buildbot Nine has a plug-in interface that the Yocto + Project customizes using code from the <filename>yocto-autobuilder2</filename> + repository, adding its own console UI plugin. The resulting UI plug-in allows you to + visualize builds in a way suited to the project's needs.</para> + + <para>A <filename>helper</filename> layer provides configuration and job management through + scripts found in the <filename>yocto-autobuilder-helper</filename> repository. The + <filename>helper</filename> layer contains the bulk of the build configuration + information and is release-specific, which makes it highly customizable on a per-project + basis. The layer is CI system-agnostic and contains a number of Helper scripts that can + generate build configurations from simple JSON files. <note> + <para>The project uses Buildbot for historical reasons but also because many of the + project developers have knowledge of python. It is possible to use the outer + layers from another Continuous Integration (CI) system such as <ulink + url="https://en.wikipedia.org/wiki/Jenkins_(software)">Jenkins</ulink> + instead of Buildbot. </para> + </note> + </para> + + <para> The following figure shows the Yocto Project Autobuilder stack with a topology that + includes a controller and a cluster of workers: <imagedata + fileref="figures/ab-test-cluster.png" width="4.6in" depth="4.35in" align="center" + scalefit="1"/> + </para> + </section> + + <section id='test-project-tests'> + <title>Yocto Project Tests - Types of Testing Overview</title> + + <para>The Autobuilder tests different elements of the project by using thefollowing types of + tests: <itemizedlist> + <listitem> + <para> + <emphasis>Build Testing:</emphasis> Tests whether specific configurations + build by varying <ulink url="&YOCTO_DOCS_REF_URL;#var-MACHINE" + ><filename>MACHINE</filename></ulink>, <ulink + url="&YOCTO_DOCS_REF_URL;#var-DISTRO" + ><filename>DISTRO</filename></ulink>, other configuration options, and + the specific target images being built (or world). Used to trigger builds of + all the different test configurations on the Autobuilder. Builds usually + cover many different targets for different architectures, machines, and + distributions, as well as different configurations, such as different init + systems. The Autobuilder tests literally hundreds of configurations and + targets. <itemizedlist> + <listitem> + <para> + <emphasis>Sanity Checks During the Build Process:</emphasis> + Tests initiated through the <ulink + url="&YOCTO_DOCS_REF_URL;#ref-classes-insane" + ><filename>insane</filename></ulink> class. These checks + ensure the output of the builds are correct. For example, does + the ELF architecture in the generated binaries match the target + system? ARM binaries would not work in a MIPS system! </para> + </listitem> + </itemizedlist></para> + </listitem> + <listitem> + <para> + <emphasis>Build Performance Testing:</emphasis> Tests whether or not + commonly used steps during builds work efficiently and avoid regressions. + Tests to time commonly used usage scenarios are run through + <filename>oe-build-perf-test</filename>. These tests are run on isolated + machines so that the time measurements of the tests are accurate and no + other processes interfere with the timing results. The project currently + tests performance on two different distributions, Fedora and Ubuntu, to + ensure we have no single point of failure and can ensure the different + distros work effectively. </para> + </listitem> + <listitem> + <para> + <emphasis>eSDK Testing:</emphasis> Image tests initiated through the + following command: + <literallayout class="monospaced"> + $ bitbake <replaceable>image</replaceable> -c testsdkext + </literallayout> + The tests utilize the <filename>testsdkext</filename> class and the + <filename>do_testsdkext</filename> task. </para> + </listitem> + <listitem> + <para> + <emphasis>Feature Testing:</emphasis> Various scenario-based tests are run + through the <ulink url="&YOCTO_DOCS_REF_URL;#testing-and-quality-assurance" + >OpenEmbedded Self-Test</ulink> (oe-selftest). We test oe-selftest on + each of the main distrubutions we support. </para> + </listitem> + <listitem> + <para> + <emphasis>Image Testing:</emphasis> Image tests initiated through the + following command: + <literallayout class="monospaced"> + $ bitbake <replaceable>image</replaceable> -c testimage + </literallayout> + The tests utilize the <ulink + url="&YOCTO_DOCS_REF_URL;#ref-classes-testimage*" + ><filename>testimage*</filename></ulink> classes and the <ulink + url="&YOCTO_DOCS_REF_URL;#ref-tasks-testimage" + ><filename>do_testimage</filename></ulink> task. </para> + </listitem> + <listitem> + <para> + <emphasis>Layer Testing:</emphasis> The Autobuilder has the possibility to + test whether specific layers work with the test of the system. The layers + tested may be selected by members of the project. Some key community layers + are also tested periodically.</para> + </listitem> + <listitem> + <para> + <emphasis>Package Testing:</emphasis> A Package Test (ptest) runs tests + against packages built by the OpenEmbedded build system on the target + machine. See the "<ulink + url="&YOCTO_DOCS_DEV_URL;#testing-packages-with-ptest">Testing Packages + With ptest</ulink>" section in the Yocto Project Development Tasks + Manual and the "<ulink url="&YOCTO_WIKI_URL;/wiki/Ptest">Ptest</ulink>" Wiki + page for more information on Ptest. </para> + </listitem> + <listitem> + <para> + <emphasis>SDK Testing:</emphasis> Image tests initiated through the + following command: + <literallayout class="monospaced"> + $ bitbake <replaceable>image</replaceable> -c testsdk + </literallayout> + The tests utilize the <ulink url="&YOCTO_DOCS_REF_URL;#ref-classes-testsdk" + ><filename>testsdk</filename></ulink> class and the + <filename>do_testsdk</filename> task. </para> + </listitem> + <listitem> + <para> + <emphasis>Unit Testing:</emphasis> Unit tests on various components of the + system run through <filename>oe-selftest</filename> and <ulink + url="&YOCTO_DOCS_REF_URL;#testing-and-quality-assurance" + ><filename>bitbake-selftest</filename></ulink>. </para> + </listitem> + <listitem> + <para> + <emphasis>Automatic Upgrade Helper:</emphasis> This target tests whether new + versions of software are available and whether we can automatically upgrade + to those new versions. If so, this target emails the maintainers with a + patch to let them know this is possible.</para> + </listitem> + </itemizedlist> + </para> + </section> + + <section id='test-test-mapping'> + <title>How Tests Map to Areas of Code</title> + + <para> + Tests map into the codebase as follows: + <itemizedlist> + <listitem><para> + <emphasis>bitbake-selftest</emphasis>: </para> + <para>These tests are self-contained and test BitBake as well as its APIs, which + include the fetchers. The tests are located in + <filename>bitbake/lib/*/tests</filename>. </para> + <para>From within the BitBake repository, run the following: + <literallayout class="monospaced"> + $ bitbake-selftest + </literallayout> + </para> + <para>To skip tests that access the Internet, use the + <filename>BB_SKIP_NETTEST</filename> variable when running + "bitbake-selftest" as follows: + <literallayout class="monospaced"> + $ BB_SKIP_NETTEST=yes bitbake-selftest + </literallayout></para> + <para>The default output is quiet and just prints a summary of what was run. To + see more information, there is a verbose + option:<literallayout class="monospaced"> + $ bitbake-selftest -v + </literallayout></para> + <para>Use this option when you wish to skip tests that access the network, which + are mostly necessary to test the fetcher modules. To specify individual test + modules to run, append the test module name to the "bitbake-selftest" + command. For example, to specify the tests for the bb.data.module, run: + <literallayout class="monospaced"> + $ bitbake-selftest bb.test.data.module + </literallayout>You + can also specify individual tests by defining the full name and module plus + the class path of the test, for example: + <literallayout class="monospaced"> + $ bitbake-selftest bb.tests.data.TestOverrides.test_one_override + </literallayout></para> + <para>The tests are based on <ulink + url="https://docs.python.org/3/library/unittest.html">Python + unittest</ulink>. </para></listitem> + <listitem><para> + <emphasis>oe-selftest</emphasis>: <itemizedlist> + <listitem> + <para>These tests use OE to test the workflows, which include + testing specific features, behaviors of tasks, and API unit + tests. </para> + </listitem> + <listitem> + <para>The tests can take advantage of parallelism through the "-j" + option, which can specify a number of threads to spread the + tests across. Note that all tests from a given class of tests + will run in the same thread. To parallelize large numbers of + tests you can split the class into multiple units.</para> + </listitem> + <listitem> + <para>The tests are based on Python unittest. </para> + </listitem> + <listitem> + <para>The code for the tests resides in + <filename>meta/lib/oeqa/selftest/cases/</filename>. </para> + </listitem> + <listitem> + <para>To run all the tests, enter the following command: + <literallayout class="monospaced"> + $ oe-selftest -a + </literallayout> + </para> + </listitem> + <listitem> + <para>To run a specific test, use the following command form where + <replaceable>testname</replaceable> is the name of the + specific test: + <literallayout class="monospaced"> + $ oe-selftest -r <replaceable>testname</replaceable> + </literallayout> + For example, the following command would run the tinfoil getVar + API + test:<literallayout class="monospaced"> + $ oe-selftest -r tinfoil.TinfoilTests.test_getvar + </literallayout>It + is also possible to run a set of tests. For example the + following command will run all of the tinfoil + tests:<literallayout class="monospaced"> + $ oe-selftest -r tinfoil + </literallayout></para> + </listitem> + </itemizedlist> + </para></listitem> + <listitem><para> + <emphasis>testimage:</emphasis> + <itemizedlist> + <listitem><para> + These tests build an image, boot it, and run tests + against the image's content. + </para></listitem> + <listitem><para> The code for these tests resides in <filename>meta/lib/oeqa/runtime/cases/</filename>. </para></listitem> + <listitem><para> + You need to set the + <ulink url='&YOCTO_DOCS_REF_URL;#var-IMAGE_CLASSES'><filename>IMAGE_CLASSES</filename></ulink> + variable as follows: + <literallayout class='monospaced'> + IMAGE_CLASSES += "testimage" + </literallayout> + </para></listitem> + <listitem><para> + Run the tests using the following command form: + <literallayout class='monospaced'> + $ bitbake <replaceable>image</replaceable> -c testimage + </literallayout> + </para></listitem> + </itemizedlist> + </para></listitem> + <listitem><para> + <emphasis>testsdk:</emphasis> + <itemizedlist> + <listitem><para>These tests build an SDK, install it, and then run tests against that SDK. </para></listitem> + <listitem><para>The code for these tests resides in <filename>meta/lib/oeqa/sdk/cases/</filename>. </para></listitem> + <listitem><para>Run the test using the following command form: + <literallayout class="monospaced"> + $ bitbake <replaceable>image</replaceable> -c testsdk + </literallayout> + </para></listitem> + </itemizedlist> + </para></listitem> + <listitem><para> + <emphasis>testsdk_ext:</emphasis> + <itemizedlist> + <listitem><para>These tests build an extended SDK (eSDK), install that eSDK, and run tests against the eSDK. </para></listitem> + <listitem><para>The code for these tests resides in <filename>meta/lib/oeqa/esdk</filename>. </para></listitem> + <listitem><para>To run the tests, use the following command form: + <literallayout class="monospaced"> + $ bitbake <replaceable>image</replaceable> -c testsdkext + </literallayout> + </para></listitem> + </itemizedlist> + </para></listitem> + + + <listitem><para> + <emphasis>oe-build-perf-test:</emphasis> + <itemizedlist> + <listitem><para>These tests run through commonly used usage scenarios and measure the performance times. </para></listitem> + <listitem><para>The code for these tests resides in <filename>meta/lib/oeqa/buildperf</filename>. </para></listitem> + <listitem><para>To run the tests, use the following command form: + <literallayout class="monospaced"> + $ oe-build-perf-test <replaceable>options</replaceable> + </literallayout>The + command takes a number of options, such as where to place the + test results. The Autobuilder Helper Scripts include the + <filename>build-perf-test-wrapper</filename> script with + examples of how to use the oe-build-perf-test from the command + line.</para> + <para>Use the <filename>oe-git-archive</filename> command to store + test results into a Git repository. </para> + <para>Use the <filename>oe-build-perf-report</filename> command to + generate text reports and HTML reports with graphs of the + performance data. For examples, see <link linkend="" + >http://downloads.yoctoproject.org/releases/yocto/yocto-2.7/testresults/buildperf-centos7/perf-centos7.yoctoproject.org_warrior_20190414204758_0e39202.html</link> + and <link linkend="" + >http://downloads.yoctoproject.org/releases/yocto/yocto-2.7/testresults/buildperf-centos7/perf-centos7.yoctoproject.org_warrior_20190414204758_0e39202.txt</link>.</para></listitem> + <listitem> + <para>The tests are contained in + <filename>lib/oeqa/buildperf/test_basic.py</filename>.</para> + </listitem> + </itemizedlist> + </para></listitem> + + + + + </itemizedlist> + </para> + </section> + + <section id='test-examples'> + <title>Test Examples</title> + + <para>This section provides example tests for each of the tests listed in the <link + linkend="test-test-mapping">How Tests Map to Areas of Code</link> section. </para> + <para>For oeqa tests, testcases for each area reside in the main test directory at + <filename>meta/lib/oeqa/selftest/cases</filename> directory.</para> + <para>For oe-selftest. bitbake testcases reside in the <filename>lib/bb/tests/</filename> + directory. </para> + + <section id='bitbake-selftest-example'> + <title><filename>bitbake-selftest</filename></title> + + <para>A simple test example from <filename>lib/bb/tests/data.py</filename> is: + <literallayout class="monospaced"> + class DataExpansions(unittest.TestCase): + def setUp(self): + self.d = bb.data.init() + self.d["foo"] = "value_of_foo" + self.d["bar"] = "value_of_bar" + self.d["value_of_foo"] = "value_of_'value_of_foo'" + + def test_one_var(self): + val = self.d.expand("${foo}") + self.assertEqual(str(val), "value_of_foo") + </literallayout> + </para> + <para>In this example, a <ulink url=""><filename>DataExpansions</filename></ulink> class + of tests is created, derived from standard python unittest. The class has a common + <filename>setUp</filename> function which is shared by all the tests in the + class. A simple test is then added to test that when a variable is expanded, the + correct value is found.</para> + <para>Bitbake selftests are straightforward python unittest. Refer to the Python + unittest documentation for additional information on writing these tests at: <link + linkend="">https://docs.python.org/3/library/unittest.html</link>.</para> + </section> + + <section id='oe-selftest-example'> + <title><filename>oe-selftest</filename></title> + + <para>These tests are more complex due to the setup required behind the scenes for full + builds. Rather than directly using Python's unittest, the code wraps most of the + standard objects. The tests can be simple, such as testing a command from within the + OE build environment using the following + example:<literallayout class="monospaced"> + class BitbakeLayers(OESelftestTestCase): + def test_bitbakelayers_showcrossdepends(self): + result = runCmd('bitbake-layers show-cross-depends') + self.assertTrue('aspell' in result.output, msg = "No dependencies + were shown. bitbake-layers show-cross-depends output: + %s"% result.output) + </literallayout></para> + <para>This example, taken from + <filename>meta/lib/oeqa/selftest/cases/bblayers.py</filename>, creates a + testcase from the <ulink url=""><filename>OESelftestTestCase</filename></ulink> + class, derived from <filename>unittest.TestCase</filename>, which runs the + <filename>bitbake-layers</filename> command and checks the output to ensure it + contains something we know should be here.</para> + <para>The <filename>oeqa.utils.commands</filename> module contains Helpers which can + assist with common tasks, including:<itemizedlist> + <listitem> + <para><emphasis>Obtaining the value of a bitbake variable:</emphasis> Use + <filename>oeqa.utils.commands.get_bb_var()</filename> or use + <filename>oeqa.utils.commands.get_bb_vars()</filename> for more than + one variable</para> + </listitem> + <listitem> + <para><emphasis>Running a bitbake invocation for a build:</emphasis> Use + <filename>oeqa.utils.commands.bitbake()</filename></para> + </listitem> + <listitem> + <para><emphasis>Running a command:</emphasis> Use + <filename>oeqa.utils.commandsrunCmd()</filename></para> + </listitem> + </itemizedlist></para> + <para>There is also a <filename>oeqa.utils.commands.runqemu()</filename> function for + launching the <filename>runqemu</filename> command for testing things within a + running, virtualized image.</para> + <para>You can run these tests in parallel. Parallelism works per test class, so tests + within a given test class should always run in the same build, while tests in + different classes or modules may be split into different builds. There is no data + store available for these tests since the tests launch the + <filename>bitbake</filename> command and exist outside of its context. As a + result, common bitbake library functions (bb.*) are also unavailable.</para> + </section> + + <section id='testimage-example'> + <title><filename>testimage</filename></title> + + <para>These tests are run once an image is up and running, either on target hardware or + under QEMU. As a result, they are assumed to be running in a target image + environment, as opposed to a host build environment. A simple example from + <filename>meta/lib/oeqa/runtime/cases/python.py</filename> contains the + following:<literallayout class="monospaced"> + class PythonTest(OERuntimeTestCase): + @OETestDepends(['ssh.SSHTest.test_ssh']) + @OEHasPackage(['python3-core']) + def test_python3(self): + cmd = "python3 -c \"import codecs; print(codecs.encode('Uryyb, + jbeyq', 'rot13'))\"" + status, output = self.target.run(cmd) + msg = 'Exit status was not 0. Output: %s' % output + self.assertEqual(status, 0, msg=msg) + </literallayout></para> + <para>In this example, the <ulink url=""><filename>OERuntimeTestCase</filename></ulink> + class wraps <filename>unittest.TestCase</filename>. Within the test, + <filename>self.target</filename> represents the target system, where commands + can be run on it using the <filename>run()</filename> method. </para> + <para>To ensure certain test or package dependencies are met, you can use the + <filename>OETestDepends</filename> and <filename>OEHasPackage</filename> + decorators. For example, the test in this example would only make sense if + python3-core is installed in the image.</para> + </section> + + <section id='testsdk_ext-example'> + <title><filename>testsdk_ext</filename></title> + + <para>These tests are run against built extensible SDKs (eSDKs). The tests can assume + that the eSDK environment has already been setup. An example from + <filename>meta/lib/oeqa/sdk/cases/devtool.py</filename> contains the + following:<literallayout class="monospaced"> + class DevtoolTest(OESDKExtTestCase): + @classmethod + def setUpClass(cls): + myapp_src = os.path.join(cls.tc.esdk_files_dir, "myapp") + cls.myapp_dst = os.path.join(cls.tc.sdk_dir, "myapp") + shutil.copytree(myapp_src, cls.myapp_dst) + subprocess.check_output(['git', 'init', '.'], cwd=cls.myapp_dst) + subprocess.check_output(['git', 'add', '.'], cwd=cls.myapp_dst) + subprocess.check_output(['git', 'commit', '-m', "'test commit'"], cwd=cls.myapp_dst) + + @classmethod + def tearDownClass(cls): + shutil.rmtree(cls.myapp_dst) + def _test_devtool_build(self, directory): + self._run('devtool add myapp %s' % directory) + try: + self._run('devtool build myapp') + finally: + self._run('devtool reset myapp') + def test_devtool_build_make(self): + self._test_devtool_build(self.myapp_dst) + </literallayout>In + this example, the <filename>devtool</filename> command is tested to see whether a + sample application can be built with the <filename>devtool build</filename> command + within the eSDK.</para> + </section> + + <section id='testsdk-example'> + <title><filename>testsdk</filename></title> + + <para>These tests are run against built SDKs. The tests can assume that an SDK has + already been extracted and its environment file has been sourced. A simple example + from <filename>meta/lib/oeqa/sdk/cases/python2.py</filename> contains the + following:<literallayout class="monospaced"> + class Python3Test(OESDKTestCase): + def setUp(self): + if not (self.tc.hasHostPackage("nativesdk-python3-core") or + self.tc.hasHostPackage("python3-core-native")): + raise unittest.SkipTest("No python3 package in the SDK") + + def test_python3(self): + cmd = "python3 -c \"import codecs; print(codecs.encode('Uryyb, jbeyq', 'rot13'))\"" + output = self._run(cmd) + self.assertEqual(output, "Hello, world\n") + </literallayout>In + this example, if nativesdk-python3-core has been installed into the SDK, the code + runs the python3 interpreter with a basic command to check it is working correctly. + The test would only run if python3 is installed in the SDK.</para> + </section> + + <section id='oe-build-perf-test-example'> + <title><filename>oe-build-perf-test</filename></title> + + <para>The performance tests usually measure how long operations take and the resource + utilisation as that happens. An example from + <filename>meta/lib/oeqa/buildperf/test_basic.py</filename> contains the + following:<literallayout class="monospaced"> + class Test3(BuildPerfTestCase): + + def test3(self): + """Bitbake parsing (bitbake -p)""" + # Drop all caches and parse + self.rm_cache() + oe.path.remove(os.path.join(self.bb_vars['TMPDIR'], 'cache'), True) + self.measure_cmd_resources(['bitbake', '-p'], 'parse_1', + 'bitbake -p (no caches)') + # Drop tmp/cache + oe.path.remove(os.path.join(self.bb_vars['TMPDIR'], 'cache'), True) + self.measure_cmd_resources(['bitbake', '-p'], 'parse_2', + 'bitbake -p (no tmp/cache)') + # Parse with fully cached data + self.measure_cmd_resources(['bitbake', '-p'], 'parse_3', + 'bitbake -p (cached)') + </literallayout>This + example shows how three specific parsing timings are measured, with and without + various caches, to show how BitBake's parsing performance trends over time.</para> + </section> + </section> + <section id='test-writing-considerations'> + <title>Considerations When Writing Tests</title> + <para>When writing good tests, there are several things to keep in mind. Since things + running on the Autobuilder are accessed concurrently by multiple workers, consider the + following:</para> + <formalpara> + <title>Running "cleanall" is not permitted</title> + <para>This can delete files from DL_DIR which would potentially break other builds + running in parallel. If this is required, DL_DIR must be set to an isolated + directory.</para> + </formalpara> + <formalpara> + <title>Running "cleansstate" is not permitted</title> + <para>This can delete files from SSTATE_DIR which would potentially break other builds + running in parallel. If this is required, SSTATE_DIR must be set to an isolated + directory. Alternatively, you can use the "-f" option with the + <filename>bitbake</filename> command to "taint" tasks by changing the sstate + checksums to ensure sstate cache items will not be reused.</para> + </formalpara> + <formalpara> + <title>Tests should not change the metadata</title> + <para>This is particularly true for oe-selftests since these can run in parallel and + changing metadata leads to changing checksums, which confuses BitBake while running + in parallel. If this is necessary, copy layers to a temporary location and modify + them. Some tests need to change metadata, such as the devtool tests. To prevent the + metadate from changes, set up temporary copies of that data first.</para> + </formalpara> + </section> + + + + + + + + +</chapter> +<!-- +vim: expandtab tw=80 ts=4 +--> diff --git a/poky/documentation/test-manual/test-manual-style.css b/poky/documentation/test-manual/test-manual-style.css new file mode 100644 index 000000000..10ee4c79c --- /dev/null +++ b/poky/documentation/test-manual/test-manual-style.css @@ -0,0 +1,991 @@ +/* + Generic XHTML / DocBook XHTML CSS Stylesheet. + + SPDX-License-Identifier: CC-BY-2.0-UK + + Browser wrangling and typographic design by + Oyvind Kolas / pippin@gimp.org + + Customised for Poky by + Matthew Allum / mallum@o-hand.com + + Thanks to: + Liam R. E. Quin + William Skaggs + Jakub Steiner + + Structure + --------- + + The stylesheet is divided into the following sections: + + Positioning + Margins, paddings, width, font-size, clearing. + Decorations + Borders, style + Colors + Colors + Graphics + Graphical backgrounds + Nasty IE tweaks + Workarounds needed to make it work in internet explorer, + currently makes the stylesheet non validating, but up until + this point it is validating. + Mozilla extensions + Transparency for footer + Rounded corners on boxes + +*/ + + + /*************** / + / Positioning / +/ ***************/ + +body { + font-family: Verdana, Sans, sans-serif; + + min-width: 640px; + width: 80%; + margin: 0em auto; + padding: 2em 5em 5em 5em; + color: #333; +} + +h1,h2,h3,h4,h5,h6,h7 { + font-family: Arial, Sans; + color: #00557D; + clear: both; +} + +h1 { + font-size: 2em; + text-align: left; + padding: 0em 0em 0em 0em; + margin: 2em 0em 0em 0em; +} + +h2.subtitle { + margin: 0.10em 0em 3.0em 0em; + padding: 0em 0em 0em 0em; 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+ text-decoration: none; +} + +/* normal text in the footer */ +div.navfooter table td { + color: black; +} + +div.navheader table td a:visited, +div.navfooter table td a:visited { + color: #444; +} + + +/* links in header and footer */ +div.navheader table td a:hover, +div.navfooter table td a:hover { + text-decoration: underline; + background-color: transparent; + color: #33a; +} + +div.navheader hr, +div.navfooter hr { + display: none; +} + + +.qandaset tr.question td p { + margin: 0em 0em 1em 0em; + padding: 0em 0em 0em 0em; +} + +.qandaset tr.answer td p { + margin: 0em 0em 1em 0em; + padding: 0em 0em 0em 0em; +} +.answer td { + padding-bottom: 1.5em; +} + +.emphasis { + font-weight: bold; +} + + + /************* / + / decorations / +/ *************/ + +.titlepage { +} + +.part .title { +} + +.subtitle { + border: none; +} + +/* +h1 { + border: none; +} + +h2 { + border-top: solid 0.2em; + border-bottom: solid 0.06em; +} + +h3 { + border-top: 0em; + border-bottom: solid 0.06em; +} + +h4 { + border: 0em; 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+} + + +.tip table th, +.warning table th, +.caution table th, +.note table th { + border-bottom-color: #fff; +} + + +.warning { + background-color: #f0f0f2; +} + +.caution { + background-color: #f0f0f2; +} + +.tip { + background-color: #f0f0f2; +} + +.note { + background-color: #f0f0f2; +} + +.glossary dl dt, +.variablelist dl dt, +.variablelist dl dt span.term { + color: #044; +} + +div.figure, +div.table, +div.example, +div.informalfigure, +div.informaltable, +div.informalexample { + border-color: #aaa; +} + +pre.programlisting { + color: black; + background-color: #fff; + border-color: #aaa; + border-width: 2px; +} + +.guimenu, +.guilabel, +.guimenuitem { + background-color: #eee; +} + + +b.keycap, +.keycap { + background-color: #eee; + border-color: #999; +} + + +div.navheader { + border-color: black; +} + + +div.navfooter { + border-color: black; +} + +.writernotes { + color: red; +} + + + /*********** / + / graphics / +/ ***********/ + +/* +body { + background-image: url("images/body_bg.jpg"); + background-attachment: fixed; +} + +.navheader, +.note, +.tip { + background-image: url("images/note_bg.jpg"); + background-attachment: fixed; +} + +.warning, +.caution { + background-image: url("images/warning_bg.jpg"); + background-attachment: fixed; +} + +.figure, +.informalfigure, +.example, +.informalexample, +.table, +.informaltable { + background-image: url("images/figure_bg.jpg"); + background-attachment: fixed; +} + +*/ +h1, +h2, +h3, +h4, +h5, +h6, +h7{ +} + +/* +Example of how to stick an image as part of the title. + +div.article .titlepage .title +{ + background-image: url("figures/white-on-black.png"); + background-position: center; + background-repeat: repeat-x; +} +*/ + +div.preface .titlepage .title, +div.colophon .title, +div.chapter .titlepage .title, +div.article .titlepage .title +{ +} + +div.section div.section .titlepage .title, +div.sect2 .titlepage .title { + background: none; +} + + +h1.title { + background-color: transparent; + background-image: url("figures/test-title.png"); + background-repeat: no-repeat; + height: 256px; + text-indent: -9000px; + overflow:hidden; +} + +h2.subtitle { + background-color: transparent; + text-indent: -9000px; + overflow:hidden; + width: 0px; + display: none; +} + + /*************************************** / + / pippin.gimp.org specific alterations / +/ ***************************************/ + +/* +div.heading, div.navheader { + color: #777; + font-size: 80%; + padding: 0; + margin: 0; + text-align: left; + position: absolute; + top: 0px; + left: 0px; + width: 100%; + height: 50px; + background: url('/gfx/heading_bg.png') transparent; + background-repeat: repeat-x; + background-attachment: fixed; + border: none; +} + +div.heading a { + color: #444; +} + +div.footing, div.navfooter { + border: none; + color: #ddd; + font-size: 80%; + text-align:right; + + width: 100%; + padding-top: 10px; + position: absolute; + bottom: 0px; + left: 0px; + + background: url('/gfx/footing_bg.png') transparent; +} +*/ + + + + /****************** / + / nasty ie tweaks / +/ ******************/ + +/* +div.heading, div.navheader { + width:expression(document.body.clientWidth + "px"); +} + +div.footing, div.navfooter { + width:expression(document.body.clientWidth + "px"); + margin-left:expression("-5em"); +} +body { + padding:expression("4em 5em 0em 5em"); +} +*/ + + /**************************************** / + / mozilla vendor specific css extensions / +/ ****************************************/ +/* +div.navfooter, div.footing{ + -moz-opacity: 0.8em; +} + +div.figure, +div.table, +div.informalfigure, +div.informaltable, +div.informalexample, +div.example, +.tip, +.warning, +.caution, +.note { + -moz-border-radius: 0.5em; +} + +b.keycap, +.keycap { + -moz-border-radius: 0.3em; +} +*/ + +table tr td table tr td { + display: none; +} + + +hr { + display: none; +} + +table { + border: 0em; +} + + .photo { + float: right; + margin-left: 1.5em; + margin-bottom: 1.5em; + margin-top: 0em; + max-width: 17em; + border: 1px solid gray; + padding: 3px; + background: white; +} + .seperator { + padding-top: 2em; + clear: both; + } + + #validators { + margin-top: 5em; + text-align: right; + color: #777; + } + @media print { + body { + font-size: 8pt; + } + .noprint { + display: none; + } + } + + +.tip, +.note { + background: #f0f0f2; + color: #333; + padding: 20px; + margin: 20px; +} + +.tip h3, +.note h3 { + padding: 0em; + margin: 0em; + font-size: 2em; + font-weight: bold; + color: #333; +} + +.tip a, +.note a { + color: #333; + text-decoration: underline; +} + +.footnote { + font-size: small; + color: #333; +} + +/* Changes the announcement text */ +.tip h3, +.warning h3, +.caution h3, +.note h3 { + font-size:large; + color: #00557D; +} diff --git a/poky/documentation/test-manual/test-manual-test-process.rst b/poky/documentation/test-manual/test-manual-test-process.rst new file mode 100644 index 000000000..96e71bf31 --- /dev/null +++ b/poky/documentation/test-manual/test-manual-test-process.rst @@ -0,0 +1,103 @@ +.. SPDX-License-Identifier: CC-BY-2.0-UK + +*********************************** +Project Testing and Release Process +*********************************** + +.. _test-daily-devel: + +Day to Day Development +====================== + +This section details how the project tests changes, through automation +on the Autobuilder or with the assistance of QA teams, through to making +releases. + +The project aims to test changes against our test matrix before those +changes are merged into the master branch. As such, changes are queued +up in batches either in the ``master-next`` branch in the main trees, or +in user trees such as ``ross/mut`` in ``poky-contrib`` (Ross Burton +helps review and test patches and this is his testing tree). + +We have two broad categories of test builds, including "full" and +"quick". On the Autobuilder, these can be seen as "a-quick" and +"a-full", simply for ease of sorting in the UI. Use our Autobuilder +console view to see where me manage most test-related items, available +at: :yocto_ab:`/typhoon/#/console`. + +Builds are triggered manually when the test branches are ready. The +builds are monitored by the SWAT team. For additional information, see +:yocto_wiki:`/wiki/Yocto_Build_Failure_Swat_Team`. +If successful, the changes would usually be merged to the ``master`` +branch. If not successful, someone would respond to the changes on the +mailing list explaining that there was a failure in testing. The choice +of quick or full would depend on the type of changes and the speed with +which the result was required. + +The Autobuilder does build the ``master`` branch once daily for several +reasons, in particular, to ensure the current ``master`` branch does +build, but also to keep ``yocto-testresults`` +(:yocto_git:`/cgit.cgi/yocto-testresults/`), +buildhistory +(:yocto_git:`/cgit.cgi/poky-buildhistory/`), and +our sstate up to date. On the weekend, there is a master-next build +instead to ensure the test results are updated for the less frequently +run targets. + +Performance builds (buildperf-\* targets in the console) are triggered +separately every six hours and automatically push their results to the +buildstats repository at: +:yocto_git:`/cgit.cgi/yocto-buildstats/`. + +The 'quick' targets have been selected to be the ones which catch the +most failures or give the most valuable data. We run 'fast' ptests in +this case for example but not the ones which take a long time. The quick +target doesn't include \*-lsb builds for all architectures, some world +builds and doesn't trigger performance tests or ltp testing. The full +build includes all these things and is slower but more comprehensive. + +Release Builds +============== + +The project typically has two major releases a year with a six month +cadence in April and October. Between these there would be a number of +milestone releases (usually four) with the final one being stablization +only along with point releases of our stable branches. + +The build and release process for these project releases is similar to +that in `Day to Day Development <#test-daily-devel>`__, in that the +a-full target of the Autobuilder is used but in addition the form is +configured to generate and publish artefacts and the milestone number, +version, release candidate number and other information is entered. The +box to "generate an email to QA"is also checked. + +When the build completes, an email is sent out using the send-qa-email +script in the ``yocto-autobuilder-helper`` repository to the list of +people configured for that release. Release builds are placed into a +directory in https://autobuilder.yocto.io/pub/releases on the +Autobuilder which is included in the email. The process from here is +more manual and control is effectively passed to release engineering. +The next steps include: + +- QA teams respond to the email saying which tests they plan to run and + when the results will be available. + +- QA teams run their tests and share their results in the yocto- + testresults-contrib repository, along with a summary of their + findings. + +- Release engineering prepare the release as per their process. + +- Test results from the QA teams are included into the release in + separate directories and also uploaded to the yocto-testresults + repository alongside the other test results for the given revision. + +- The QA report in the final release is regenerated using resulttool to + include the new test results and the test summaries from the teams + (as headers to the generated report). + +- The release is checked against the release checklist and release + readiness criteria. + +- A final decision on whether to release is made by the YP TSC who have + final oversight on release readiness. diff --git a/poky/documentation/test-manual/test-manual-test-process.xml b/poky/documentation/test-manual/test-manual-test-process.xml new file mode 100644 index 000000000..6e2157c62 --- /dev/null +++ b/poky/documentation/test-manual/test-manual-test-process.xml @@ -0,0 +1,110 @@ +<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" +"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" +[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] > +<!--SPDX-License-Identifier: CC-BY-2.0-UK--> + +<chapter id='test-manual-test-process'> + +<title>Project Testing and Release Process</title> + <section id='test-daily-devel'> + <title>Day to Day Development</title> + + <para>This section details how the project tests changes, through automation on the + Autobuilder or with the assistance of QA teams, through to making releases.</para> + + <para>The project aims to test changes against our test matrix before those changes are + merged into the master branch. As such, changes are queued up in batches either in the + <filename>master-next</filename> branch in the main trees, or in user trees such as + <filename>ross/mut</filename> in <filename>poky-contrib</filename> (Ross Burton + helps review and test patches and this is his testing tree).</para> + <para>We have two broad categories of test builds, including "full" and "quick". On the + Autobuilder, these can be seen as "a-quick" and "a-full", simply for ease of sorting in + the UI. Use our Autobuilder console view to see where me manage most test-related items, + available at: <link linkend="" + >https://autobuilder.yoctoproject.org/typhoon/#/console</link>.</para> + <para>Builds are triggered manually when the test branches are ready. The builds are + monitored by the SWAT team. For additional information, see <link linkend="" + >https://wiki.yoctoproject.org/wiki/Yocto_Build_Failure_Swat_Team</link>. If + successful, the changes would usually be merged to the <filename>master</filename> + branch. If not successful, someone would respond to the changes on the mailing list + explaining that there was a failure in testing. The choice of quick or full would depend + on the type of changes and the speed with which the result was required.</para> + <para>The Autobuilder does build the <filename>master</filename> branch once daily for + several reasons, in particular, to ensure the current <filename>master</filename> branch + does build, but also to keep <filename>yocto-testresults</filename> (<link linkend="" + >http://git.yoctoproject.org/cgit.cgi/yocto-testresults/</link>), buildhistory + (<link linkend="">http://git.yoctoproject.org/cgit.cgi/poky-buildhistory/</link>), + and our sstate up to date. On the weekend, there is a master-next build instead to + ensure the test results are updated for the less frequently run targets.</para> + <para>Performance builds (buildperf-* targets in the console) are triggered separately every + six hours and automatically push their results to the buildstats repository at: <link + linkend="">http://git.yoctoproject.org/cgit.cgi/yocto-buildstats/</link>. </para> + <para>The 'quick' targets have been selected to be the ones which catch the most failures or + give the most valuable data. We run 'fast' ptests in this case for example but not the + ones which take a long time. The quick target doesn't include *-lsb builds for all + architectures, some world builds and doesn't trigger performance tests or ltp testing. + The full build includes all these things and is slower but more comprehensive.</para> + </section> + + <section id='test-yocto-project-autobuilder-overview'> + <title>Release Builds</title> + + <para>The project typically has two major releases a year with a six month cadence in April + and October. Between these there would be a number of milestone releases (usually four) + with the final one being stablization only along with point releases of our stable + branches.</para> + <para>The build and release process for these project releases is similar to that in <link + linkend="test-daily-devel">Day to Day Development</link>, in that the a-full target + of the Autobuilder is used but in addition the form is configured to generate and + publish artefacts and the milestone number, version, release candidate number and other + information is entered. The box to "generate an email to QA"is also checked.</para> + <para>When the build completes, an email is sent out using the send-qa-email script in the + <filename>yocto-autobuilder-helper</filename> repository to the list of people + configured for that release. Release builds are placed into a directory in <link + linkend="">https://autobuilder.yocto.io/pub/releases</link> on the Autobuilder which + is included in the email. The process from here is more manual and control is + effectively passed to release engineering. The next steps include:<itemizedlist> + <listitem> + <para>QA teams respond to the email saying which tests they plan to run and when + the results will be available.</para> + </listitem> + <listitem> + <para>QA teams run their tests and share their results in the yocto- + testresults-contrib repository, along with a summary of their findings. + </para> + </listitem> + <listitem> + <para>Release engineering prepare the release as per their process. </para> + </listitem> + <listitem> + <para>Test results from the QA teams are included into the release in separate + directories and also uploaded to the yocto-testresults repository alongside + the other test results for the given revision.</para> + </listitem> + <listitem> + <para>The QA report in the final release is regenerated using resulttool to + include the new test results and the test summaries from the teams (as + headers to the generated report).</para> + </listitem> + <listitem> + <para>The release is checked against the release checklist and release readiness + criteria.</para> + </listitem> + <listitem> + <para>A final decision on whether to release is made by the YP TSC who have + final oversight on release readiness.</para> + </listitem> + </itemizedlist></para> + </section> + + + + + + + + +</chapter> +<!-- +vim: expandtab tw=80 ts=4 +--> diff --git a/poky/documentation/test-manual/test-manual-understand-autobuilder.rst b/poky/documentation/test-manual/test-manual-understand-autobuilder.rst new file mode 100644 index 000000000..2fcae5000 --- /dev/null +++ b/poky/documentation/test-manual/test-manual-understand-autobuilder.rst @@ -0,0 +1,305 @@ +.. SPDX-License-Identifier: CC-BY-2.0-UK + +******************************************* +Understanding the Yocto Project Autobuilder +******************************************* + +Execution Flow within the Autobuilder +===================================== + +The "a-full" and "a-quick" targets are the usual entry points into the +Autobuilder and it makes sense to follow the process through the system +starting there. This is best visualised from the Autobuilder Console +view (:yocto_ab:`/typhoon/#/console`). + +Each item along the top of that view represents some "target build" and +these targets are all run in parallel. The 'full' build will trigger the +majority of them, the "quick" build will trigger some subset of them. +The Autobuilder effectively runs whichever configuration is defined for +each of those targets on a seperate buildbot worker. To understand the +configuration, you need to look at the entry on ``config.json`` file +within the ``yocto-autobuilder-helper`` repository. The targets are +defined in the ‘overrides' section, a quick example could be qemux86-64 +which looks like:: + + "qemux86-64" : { + "MACHINE" : "qemux86-64", + "TEMPLATE" : "arch-qemu", + "step1" : { + "extravars" : [ + "IMAGE_FSTYPES_append = ' wic wic.bmap'" + ] + } + }, + +And to expand that, you need the "arch-qemu" entry from +the "templates" section, which looks like:: + + "arch-qemu" : { + "BUILDINFO" : true, + "BUILDHISTORY" : true, + "step1" : { + "BBTARGETS" : "core-image-sato core-image-sato-dev core-image-sato-sdk core-image-minimal core-image-minimal-dev core-image-sato:do_populate_sdk", + "SANITYTARGETS" : "core-image-minimal:do_testimage core-image-sato:do_testimage core-image-sato-sdk:do_testimage core-image-sato:do_testsdk" + }, + "step2" : { + "SDKMACHINE" : "x86_64", + "BBTARGETS" : "core-image-sato:do_populate_sdk core-image-minimal:do_populate_sdk_ext core-image-sato:do_populate_sdk_ext", + "SANITYTARGETS" : "core-image-sato:do_testsdk core-image-minimal:do_testsdkext core-image-sato:do_testsdkext" + }, + "step3" : { + "BUILDHISTORY" : false, + "EXTRACMDS" : ["${SCRIPTSDIR}/checkvnc; DISPLAY=:1 oe-selftest ${HELPERSTMACHTARGS} -j 15"], + "ADDLAYER" : ["${BUILDDIR}/../meta-selftest"] + } + }, + +Combining these two entries you can see that "qemux86-64" is a three step build where the +``bitbake BBTARGETS`` would be run, then ``bitbake SANITYTARGETS`` for each step; all for +``MACHINE="qemx86-64"`` but with differing SDKMACHINE settings. In step +1 an extra variable is added to the ``auto.conf`` file to enable wic +image generation. + +While not every detail of this is covered here, you can see how the +template mechanism allows quite complex configurations to be built up +yet allows duplication and repetition to be kept to a minimum. + +The different build targets are designed to allow for parallelisation, +so different machines are usually built in parallel, operations using +the same machine and metadata are built sequentially, with the aim of +trying to optimise build efficiency as much as possible. + +The ``config.json`` file is processed by the scripts in the Helper +repository in the ``scripts`` directory. The following section details +how this works. + +.. _test-autobuilder-target-exec-overview: + +Autobuilder Target Execution Overview +===================================== + +For each given target in a build, the Autobuilder executes several +steps. These are configured in ``yocto-autobuilder2/builders.py`` and +roughly consist of: + +#. *Run clobberdir*. + + This cleans out any previous build. Old builds are left around to + allow easier debugging of failed builds. For additional information, + see :ref:`test-manual/test-manual-understand-autobuilder:clobberdir`. + +#. *Obtain yocto-autobuilder-helper* + + This step clones the ``yocto-autobuilder-helper`` git repository. + This is necessary to prevent the requirement to maintain all the + release or project-specific code within Buildbot. The branch chosen + matches the release being built so we can support older releases and + still make changes in newer ones. + +#. *Write layerinfo.json* + + This transfers data in the Buildbot UI when the build was configured + to the Helper. + +#. *Call scripts/shared-repo-unpack* + + This is a call into the Helper scripts to set up a checkout of all + the pieces this build might need. It might clone the BitBake + repository and the OpenEmbedded-Core repository. It may clone the + Poky repository, as well as additional layers. It will use the data + from the ``layerinfo.json`` file to help understand the + configuration. It will also use a local cache of repositories to + speed up the clone checkouts. For additional information, see + :ref:`test-manual/test-manual-understand-autobuilder:Autobuilder Clone Cache`. + + This step has two possible modes of operation. If the build is part + of a parent build, its possible that all the repositories needed may + already be available, ready in a pre-prepared directory. An "a-quick" + or "a-full" build would prepare this before starting the other + sub-target builds. This is done for two reasons: + + - the upstream may change during a build, for example, from a forced + push and this ensures we have matching content for the whole build + + - if 15 Workers all tried to pull the same data from the same repos, + we can hit resource limits on upstream servers as they can think + they are under some kind of network attack + + This pre-prepared directory is shared among the Workers over NFS. If + the build is an individual build and there is no "shared" directory + available, it would clone from the cache and the upstreams as + necessary. This is considered the fallback mode. + +#. *Call scripts/run-config* + + This is another call into the Helper scripts where its expected that + the main functionality of this target will be executed. + +.. _test-autobuilder-tech: + +Autobuilder Technology +====================== + +The Autobuilder has Yocto Project-specific functionality to allow builds +to operate with increased efficiency and speed. + +.. _test-clobberdir: + +clobberdir +---------- + +When deleting files, the Autobuilder uses ``clobberdir``, which is a +special script that moves files to a special location, rather than +deleting them. Files in this location are deleted by an ``rm`` command, +which is run under ``ionice -c 3``. For example, the deletion only +happens when there is idle IO capacity on the Worker. The Autobuilder +Worker Janitor runs this deletion. See :ref:`test-manual/test-manual-understand-autobuilder:Autobuilder Worker Janitor`. + +.. _test-autobuilder-clone-cache: + +Autobuilder Clone Cache +----------------------- + +Cloning repositories from scratch each time they are required was slow +on the Autobuilder. We therefore have a stash of commonly used +repositories pre-cloned on the Workers. Data is fetched from these +during clones first, then "topped up" with later revisions from any +upstream when necesary. The cache is maintained by the Autobuilder +Worker Janitor. See :ref:`test-manual/test-manual-understand-autobuilder:Autobuilder Worker Janitor`. + +.. _test-autobuilder-worker-janitor: + +Autobuilder Worker Janitor +-------------------------- + +This is a process running on each Worker that performs two basic +operations, including background file deletion at IO idle (see :ref:`test-manual/test-manual-understand-autobuilder:Autobuilder Target Execution Overview`: Run clobberdir) and +maintainenance of a cache of cloned repositories to improve the speed +the system can checkout repositories. + +.. _test-shared-dl-dir: + +Shared DL_DIR +------------- + +The Workers are all connected over NFS which allows DL_DIR to be shared +between them. This reduces network accesses from the system and allows +the build to be sped up. Usage of the directory within the build system +is designed to be able to be shared over NFS. + +.. _test-shared-sstate-cache: + +Shared SSTATE_DIR +----------------- + +The Workers are all connected over NFS which allows the ``sstate`` +directory to be shared between them. This means once a Worker has built +an artifact, all the others can benefit from it. Usage of the directory +within the directory is designed for sharing over NFS. + +.. _test-resulttool: + +Resulttool +---------- + +All of the different tests run as part of the build generate output into +``testresults.json`` files. This allows us to determine which tests ran +in a given build and their status. Additional information, such as +failure logs or the time taken to run the tests, may also be included. + +Resulttool is part of OpenEmbedded-Core and is used to manipulate these +json results files. It has the ability to merge files together, display +reports of the test results and compare different result files. + +For details, see :yocto_wiki:`/wiki/Resulttool`. + +.. _test-run-config-tgt-execution: + +run-config Target Execution +=========================== + +The ``scripts/run-config`` execution is where most of the work within +the Autobuilder happens. It runs through a number of steps; the first +are general setup steps that are run once and include: + +#. Set up any ``buildtools-tarball`` if configured. + +#. Call "buildhistory-init" if buildhistory is configured. + +For each step that is configured in ``config.json``, it will perform the +following: + +#. Add any layers that are specified using the + ``bitbake-layers add-layer`` command (logging as stepXa) + +#. Call the ``scripts/setup-config`` script to generate the necessary + ``auto.conf`` configuration file for the build + +#. Run the ``bitbake BBTARGETS`` command (logging as stepXb) + +#. Run the ``bitbake SANITYTARGETS`` command (logging as stepXc) + +#. Run the ``EXTRACMDS`` command, which are run within the BitBake build + environment (logging as stepXd) + +#. Run the ``EXTRAPLAINCMDS`` command(s), which are run outside the + BitBake build environment (logging as stepXd) + +#. Remove any layers added in step + 1 using the ``bitbake-layers remove-layer`` command (logging as stepXa) + +Once the execution steps above complete, ``run-config`` executes a set +of post-build steps, including: + +#. Call ``scripts/publish-artifacts`` to collect any output which is to + be saved from the build. + +#. Call ``scripts/collect-results`` to collect any test results to be + saved from the build. + +#. Call ``scripts/upload-error-reports`` to send any error reports + generated to the remote server. + +#. Cleanup the build directory using + :ref:`test-manual/test-manual-understand-autobuilder:clobberdir` if the build was successful, + else rename it to "build-renamed" for potential future debugging. + +.. _test-deploying-yp-autobuilder: + +Deploying Yocto Autobuilder +=========================== + +The most up to date information about how to setup and deploy your own +Autbuilder can be found in README.md in the ``yocto-autobuilder2`` +repository. + +We hope that people can use the ``yocto-autobuilder2`` code directly but +it is inevitable that users will end up needing to heavily customise the +``yocto-autobuilder-helper`` repository, particularly the +``config.json`` file as they will want to define their own test matrix. + +The Autobuilder supports wo customization options: + +- variable substitution + +- overlaying configuration files + +The standard ``config.json`` minimally attempts to allow substitution of +the paths. The Helper script repository includes a +``local-example.json`` file to show how you could override these from a +separate configuration file. Pass the following into the environment of +the Autobuilder:: + + $ ABHELPER_JSON="config.json local-example.json" + +As another example, you could also pass the following into the +environment:: + + $ ABHELPER_JSON="config.json /some/location/local.json" + +One issue users often run into is validation of the ``config.json`` files. A +tip for minimizing issues from invalid json files is to use a Git +``pre-commit-hook.sh`` script to verify the JSON file before committing +it. Create a symbolic link as follows:: + + $ ln -s ../../scripts/pre-commit-hook.sh .git/hooks/pre-commit diff --git a/poky/documentation/test-manual/test-manual-understand-autobuilder.xml b/poky/documentation/test-manual/test-manual-understand-autobuilder.xml new file mode 100644 index 000000000..8600367be --- /dev/null +++ b/poky/documentation/test-manual/test-manual-understand-autobuilder.xml @@ -0,0 +1,314 @@ +<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" +"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" +[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] > +<!--SPDX-License-Identifier: CC-BY-2.0-UK--> + +<chapter id='test-manual-understand-autobuilder'> + +<title>Understanding the Yocto Project Autobuilder</title> + <section> + <title>Execution Flow within the Autobuilder</title> + <para>The "a-full" and "a-quick" targets are the usual entry points into the Autobuilder and + it makes sense to follow the process through the system starting there. This is best + visualised from the Autobuilder Console view (<link linkend="" + >https://autobuilder.yoctoproject.org/typhoon/#/console</link>). </para> + <para>Each item along the top of that view represents some "target build" and these targets + are all run in parallel. The 'full' build will trigger the majority of them, the "quick" + build will trigger some subset of them. The Autobuilder effectively runs whichever + configuration is defined for each of those targets on a seperate buildbot worker. To + understand the configuration, you need to look at the entry on + <filename>config.json</filename> file within the + <filename>yocto-autobuilder-helper</filename> repository. The targets are defined in + the ‘overrides' section, a quick example could be qemux86-64 which looks + like:<literallayout class="monospaced"> + "qemux86-64" : { + "MACHINE" : "qemux86-64", + "TEMPLATE" : "arch-qemu", + "step1" : { + "extravars" : [ + "IMAGE_FSTYPES_append = ' wic wic.bmap'" + ] + } + }, + </literallayout>And + to expand that, you need the "arch-qemu" entry from the "templates" section, which looks + like:<literallayout class="monospaced"> + "arch-qemu" : { + "BUILDINFO" : true, + "BUILDHISTORY" : true, + "step1" : { + "BBTARGETS" : "core-image-sato core-image-sato-dev core-image-sato-sdk core-image-minimal core-image-minimal-dev core-image-sato:do_populate_sdk", + "SANITYTARGETS" : "core-image-minimal:do_testimage core-image-sato:do_testimage core-image-sato-sdk:do_testimage core-image-sato:do_testsdk" + }, + "step2" : { + "SDKMACHINE" : "x86_64", + "BBTARGETS" : "core-image-sato:do_populate_sdk core-image-minimal:do_populate_sdk_ext core-image-sato:do_populate_sdk_ext", + "SANITYTARGETS" : "core-image-sato:do_testsdk core-image-minimal:do_testsdkext core-image-sato:do_testsdkext" + }, + "step3" : { + "BUILDHISTORY" : false, + "EXTRACMDS" : ["${SCRIPTSDIR}/checkvnc; DISPLAY=:1 oe-selftest ${HELPERSTMACHTARGS} -j 15"], + "ADDLAYER" : ["${BUILDDIR}/../meta-selftest"] + } + }, + </literallayout>Combining + these two entries you can see that "qemux86-64" is a three step build where the + <filename>bitbake BBTARGETS</filename> would be run, then <filename>bitbake + SANITYTARGETS</filename> for each step; all for + <filename>MACHINE="qemx86-64"</filename> but with differing SDKMACHINE settings. In + step 1 an extra variable is added to the <filename>auto.conf</filename> file to enable + wic image generation.</para> + <para>While not every detail of this is covered here, you can see how the templating + mechanism allows quite complex configurations to be built up yet allows duplication and + repetition to be kept to a minimum.</para> + <para>The different build targets are designed to allow for parallelisation, so different + machines are usually built in parallel, operations using the same machine and metadata + are built sequentially, with the aim of trying to optimise build efficiency as much as + possible.</para> + <para>The <filename>config.json</filename> file is processed by the scripts in the Helper + repository in the <filename>scripts</filename> directory. The following section details + how this works.</para> + </section> + + <section id='test-autobuilder-target-exec-overview'> + <title>Autobuilder Target Execution Overview</title> + + <para>For each given target in a build, the Autobuilder executes several steps. These are + configured in <filename>yocto-autobuilder2/builders.py</filename> and roughly consist + of: <orderedlist> + <listitem id='test-list-tgt-exec-clobberdir'> + <para><emphasis>Run <filename>clobberdir</filename></emphasis></para> + <para>This cleans out any previous build. Old builds are left around to allow + easier debugging of failed builds. For additional information, see <link + linkend="test-clobberdir"><filename>clobberdir</filename></link>.</para> + </listitem> + <listitem> + <para><emphasis>Obtain yocto-autobuilder-helper</emphasis></para> + <para>This step clones the <filename>yocto-autobuilder-helper</filename> git + repository. This is necessary to prevent the requirement to maintain all the + release or project-specific code within Buildbot. The branch chosen matches + the release being built so we can support older releases and still make + changes in newer ones.</para> + </listitem> + <listitem> + <para><emphasis>Write layerinfo.json</emphasis></para> + <para>This transfers data in the Buildbot UI when the build was configured to + the Helper.</para> + </listitem> + <listitem> + <para><emphasis>Call scripts/shared-repo-unpack</emphasis></para> + <para>This is a call into the Helper scripts to set up a checkout of all the + pieces this build might need. It might clone the BitBake repository and the + OpenEmbedded-Core repository. It may clone the Poky repository, as well as + additional layers. It will use the data from the + <filename>layerinfo.json</filename> file to help understand the + configuration. It will also use a local cache of repositories to speed up + the clone checkouts. For additional information, see <link + linkend="test-autobuilder-clone-cache">Autobuilder Clone + Cache</link>.</para> + <para>This step has two possible modes of operation. If the build is part of a + parent build, its possible that all the repositories needed may already be + available, ready in a pre-prepared directory. An "a-quick" or "a-full" build + would prepare this before starting the other sub-target builds. This is done + for two reasons:<itemizedlist> + <listitem> + <para>the upstream may change during a build, for example, from a + forced push and this ensures we have matching content for the + whole build</para> + </listitem> + <listitem> + <para>if 15 Workers all tried to pull the same data from the same + repos, we can hit resource limits on upstream servers as they + can think they are under some kind of network attack</para> + </listitem> + </itemizedlist>This pre-prepared directory is shared among the Workers over + NFS. If the build is an individual build and there is no "shared" directory + available, it would clone from the cache and the upstreams as necessary. + This is considered the fallback mode.</para> + </listitem> + <listitem> + <para><emphasis>Call scripts/run-config</emphasis></para> + <para>This is another call into the Helper scripts where its expected that the + main functionality of this target will be executed.</para> + </listitem> + </orderedlist></para> + </section> + <section id='test-autobuilder-tech'> + <title>Autobuilder Technology</title> + <para>The Autobuilder has Yocto Project-specific functionality to allow builds to operate + with increased efficiency and speed.</para> + <section id='test-clobberdir'> + <title>clobberdir</title> + <para>When deleting files, the Autobuilder uses <filename>clobberdir</filename>, which + is a special script that moves files to a special location, rather than deleting + them. Files in this location are deleted by an <filename>rm</filename> command, + which is run under <filename>ionice -c 3</filename>. For example, the deletion only + happens when there is idle IO capacity on the Worker. The Autobuilder Worker Janitor + runs this deletion. See <link linkend="test-autobuilder-worker-janitor">Autobuilder + Worker Janitor</link>.</para> + </section> + <section id='test-autobuilder-clone-cache'> + <title>Autobuilder Clone Cache</title> + <para>Cloning repositories from scratch each time they are required was slow on the + Autobuilder. We therefore have a stash of commonly used repositories pre-cloned on + the Workers. Data is fetched from these during clones first, then "topped up" with + later revisions from any upstream when necesary. The cache is maintained by the + Autobuilder Worker Janitor. See <link linkend="test-autobuilder-worker-janitor" + >Autobuilder Worker Janitor</link>.</para> + </section> + <section id='test-autobuilder-worker-janitor'> + <title>Autobuilder Worker Janitor</title> + <para>This is a process running on each Worker that performs two basic operations, + including background file deletion at IO idle (see <link + linkend="test-list-tgt-exec-clobberdir">Target Execution: clobberdir</link>) and + maintainenance of a cache of cloned repositories to improve the speed the system can + checkout repositories.</para> + </section> + <section id='test-shared-dl-dir'> + <title>Shared DL_DIR</title> + <para>The Workers are all connected over NFS which allows DL_DIR to be shared between + them. This reduces network accesses from the system and allows the build to be sped + up. Usage of the directory within the build system is designed to be able to be + shared over NFS.</para> + </section> + <section id='test-shared-sstate-cache'> + <title>Shared SSTATE_DIR</title> + <para>The Workers are all connected over NFS which allows the + <filename>sstate</filename> directory to be shared between them. This means once + a Worker has built an artefact, all the others can benefit from it. Usage of the + directory within the directory is designed for sharing over NFS.</para> + </section> + <section id='test-resulttool'> + <title>Resulttool</title> + <para>All of the different tests run as part of the build generate output into + <filename>testresults.json</filename> files. This allows us to determine which + tests ran in a given build and their status. Additional information, such as failure + logs or the time taken to run the tests, may also be included.</para> + <para>Resulttool is part of OpenEmbedded-Core and is used to manipulate these json + results files. It has the ability to merge files together, display reports of the + test results and compare different result files.</para> + <para>For details, see <link linkend="" + >https://wiki.yoctoproject.org/wiki/Resulttool</link>.</para> + </section> + </section> + <section id='test-run-config-tgt-execution'> + <title>run-config Target Execution</title> + <para>The <filename>scripts/run-config</filename> execution is where most of the work within + the Autobuilder happens. It runs through a number of steps; the first are general setup + steps that are run once and include:<orderedlist> + <listitem> + <para>Set up any <filename>buildtools-tarball</filename> if configured.</para> + </listitem> + <listitem> + <para>Call "buildhistory-init" if buildhistory is configured.</para> + </listitem> + </orderedlist></para> + <para>For each step that is configured in <filename>config.json</filename>, it will perform + the following:</para> + <para> + <remark>## WRITER's question: What does "logging in as stepXa" and others refer to + below? ##</remark> + <orderedlist> + <listitem id="test-run-config-add-layers-step"> + <para dir="ltr">Add any layers that are specified using the + <filename>bitbake-layers add-layer</filename> command (logging as + stepXa)</para> + </listitem> + <listitem> + <para dir="ltr">Call the <filename>scripts/setup-config</filename> script to + generate the necessary <filename>auto.conf</filename> configuration file for + the build</para> + </listitem> + <listitem> + <para dir="ltr">Run the <filename>bitbake BBTARGETS</filename> command (logging + as stepXb)</para> + </listitem> + <listitem> + <para dir="ltr">Run the <filename>bitbake SANITYTARGETS</filename> command + (logging as stepXc)</para> + </listitem> + <listitem> + <para dir="ltr">Run the <filename>EXTRACMDS</filename> command, which are run + within the BitBake build environment (logging as stepXd)</para> + </listitem> + <listitem> + <para dir="ltr">Run the <filename>EXTRAPLAINCMDS</filename> command(s), which + are run outside the BitBake build environment (logging as stepXd)</para> + </listitem> + <listitem> + <para dir="ltr">Remove any layers added in <link + linkend="test-run-config-add-layers-step">step 1</link> using the + <filename>bitbake-layers remove-layer</filename> command (logging as + stepXa)</para> + </listitem> + </orderedlist> + </para> + <para>Once the execution steps above complete, <filename>run-config</filename> executes a + set of post-build steps, including:<orderedlist> + <listitem> + <para dir="ltr">Call <filename>scripts/publish-artifacts</filename> to collect + any output which is to be saved from the build.</para> + </listitem> + <listitem> + <para dir="ltr">Call <filename>scripts/collect-results</filename> to collect any + test results to be saved from the build.</para> + </listitem> + <listitem> + <para dir="ltr">Call <filename>scripts/upload-error-reports</filename> to send + any error reports generated to the remote server.</para> + </listitem> + <listitem> + <para dir="ltr">Cleanup the build directory using <link + linkend="test-clobberdir"><filename>clobberdir</filename></link> if the + build was successful, else rename it to "build-renamed" for potential future + debugging.</para> + </listitem> + </orderedlist></para> + </section> + <section id='test-deploying-yp-autobuilder'> + <title>Deploying Yocto Autobuilder</title> + <para>The most up to date information about how to setup and deploy your own Autbuilder can + be found in README.md in the <filename>yocto-autobuilder2</filename> repository.</para> + <para>We hope that people can use the <filename>yocto-autobuilder2</filename> code directly + but it is inevitable that users will end up needing to heavily customise the + <filename>yocto-autobuilder-helper</filename> repository, particularly the + <filename>config.json</filename> file as they will want to define their own test + matrix.</para> + <para>The Autobuilder supports wo customization options: <itemizedlist> + <listitem> + <para>variable substitution</para> + </listitem> + <listitem> + <para>overlaying configuration files</para> + </listitem> + </itemizedlist>The standard <filename>config.json</filename> minimally attempts to allow + substitution of the paths. The Helper script repository includes a + <filename>local-example.json</filename> file to show how you could override these + from a separate configuration file. Pass the following into the environment of the + Autobuilder:<literallayout class="monospaced"> + $ ABHELPER_JSON="config.json local-example.json" + </literallayout>As + another example, you could also pass the following into the + environment:<literallayout class="monospaced"> + $ ABHELPER_JSON="config.json <replaceable>/some/location/</replaceable>local.json" + </literallayout>One + issue users often run into is validation of the <filename>config.json</filename> files. + A tip for minimizing issues from invalid json files is to use a Git + <filename>pre-commit-hook.sh</filename> script to verify the JSON file before + committing it. Create a symbolic link as + follows:<literallayout class="monospaced"> + $ ln -s ../../scripts/pre-commit-hook.sh .git/hooks/pre-commit + </literallayout></para> + </section> + + + + + + + + +</chapter> +<!-- +vim: expandtab tw=80 ts=4 +--> diff --git a/poky/documentation/test-manual/test-manual.rst b/poky/documentation/test-manual/test-manual.rst new file mode 100644 index 000000000..bd5b1b096 --- /dev/null +++ b/poky/documentation/test-manual/test-manual.rst @@ -0,0 +1,18 @@ +.. SPDX-License-Identifier: CC-BY-2.0-UK + +===================================== +Yocto Project Test Environment Manual +===================================== + +| + +.. toctree:: + :caption: Table of Contents + :numbered: + + test-manual-intro + test-manual-test-process + test-manual-understand-autobuilder + history + +.. include:: /boilerplate.rst diff --git a/poky/documentation/test-manual/test-manual.xml b/poky/documentation/test-manual/test-manual.xml new file mode 100755 index 000000000..d454566c5 --- /dev/null +++ b/poky/documentation/test-manual/test-manual.xml @@ -0,0 +1,104 @@ +<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" +"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" +[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] > +<!--SPDX-License-Identifier: CC-BY-2.0-UK--> + +<book id='test-manual' lang='en' + xmlns:xi="http://www.w3.org/2003/XInclude" + xmlns="http://docbook.org/ns/docbook" + > + <bookinfo> + + <mediaobject> + <imageobject> + <imagedata fileref='figures/test-manual-title.png' + format='SVG' + align='left' scalefit='1' width='100%'/> + </imageobject> + </mediaobject> + + <title> + Yocto Project Test Environment Manual + </title> + + <authorgroup> + <author> + <affiliation> + <orgname>&ORGNAME;</orgname> + </affiliation> + <email>&ORGEMAIL;</email> + </author> + </authorgroup> + + <revhistory> + <revision> + <revnumber>3.1.1</revnumber> + <date>TBD</date> + <revremark>DRAFT - Work-in-Progress - posted June 16, 2020</revremark> + </revision> + </revhistory> + + <copyright> + <year>©RIGHT_YEAR;</year> + <holder>Linux Foundation</holder> + </copyright> + + <legalnotice> + <para> + Permission is granted to copy, distribute and/or modify this document under + the terms of the <ulink type="http" url="http://creativecommons.org/licenses/by-sa/2.0/uk/"> + Creative Commons Attribution-Share Alike 2.0 UK: England & Wales</ulink> as published by + Creative Commons. + </para> + <note><title>Manual Notes</title> + <itemizedlist> + <listitem><para> + This version of the + <emphasis>Yocto Project Test Environment Manual</emphasis> + is for the &YOCTO_DOC_VERSION; release of the + Yocto Project. + To be sure you have the latest version of the manual + for this release, go to the + <ulink url='&YOCTO_HOME_URL;/documentation'>Yocto Project documentation page</ulink> + and select the manual from that site. + Manuals from the site are more up-to-date than manuals + derived from the Yocto Project released TAR files. + </para></listitem> + <listitem><para> + If you located this manual through a web search, the + version of the manual might not be the one you want + (e.g. the search might have returned a manual much + older than the Yocto Project version with which you + are working). + You can see all Yocto Project major releases by + visiting the + <ulink url='&YOCTO_WIKI_URL;/wiki/Releases'>Releases</ulink> + page. + If you need a version of this manual for a different + Yocto Project release, visit the + <ulink url='&YOCTO_HOME_URL;/documentation'>Yocto Project documentation page</ulink> + and select the manual set by using the + "ACTIVE RELEASES DOCUMENTATION" or "DOCUMENTS ARCHIVE" + pull-down menus. + </para></listitem> + <listitem><para> + To report any inaccuracies or problems with this + manual, send an email to the Yocto Project + discussion group at + <filename>yocto@yoctoproject.com</filename> or log into + the freenode <filename>#yocto</filename> channel. + </para></listitem> + </itemizedlist> + </note> + </legalnotice> + + </bookinfo> + + <xi:include href="test-manual-intro.xml"/> + <xi:include href="test-manual-test-process.xml"/> + <xi:include href="test-manual-understand-autobuilder.xml"/> + +</book> +<!-- +vim: expandtab tw=80 ts=4 +--> |