42d69512d9
With the introduction of tempest plugins we can now remove the third party tests for the ec2 api using boto. They've always been the ugly duckling in tempest (except that it never turned into a swan) where they go against some of the fundamental principles of tempest tests. For exaple, like having it's own client implementation, oh and testing OpenStack APIs. This patch removes all the pieces of the third party test dir and deprecates all the config options related to boto. A plugin implementation is being worked [1] that can be used to fill the coverage hole left by removing these from the tempest tree [1] https://github.com/mtreinish/tempest_ec2 Change-Id: Ib5e24e19bcba9808a9f49fe7f328668df77fe4f9
211 lines
9.0 KiB
ReStructuredText
211 lines
9.0 KiB
ReStructuredText
Tempest - The OpenStack Integration Test Suite
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==============================================
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This is a set of integration tests to be run against a live OpenStack
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cluster. Tempest has batteries of tests for OpenStack API validation,
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Scenarios, and other specific tests useful in validating an OpenStack
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deployment.
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Design Principles
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-----------------
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Tempest Design Principles that we strive to live by.
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- Tempest should be able to run against any OpenStack cloud, be it a
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one node devstack install, a 20 node lxc cloud, or a 1000 node kvm
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cloud.
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- Tempest should be explicit in testing features. It is easy to auto
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discover features of a cloud incorrectly, and give people an
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incorrect assessment of their cloud. Explicit is always better.
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- Tempest uses OpenStack public interfaces. Tests in Tempest should
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only touch public interfaces, API calls (native or 3rd party),
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or libraries.
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- Tempest should not touch private or implementation specific
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interfaces. This means not directly going to the database, not
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directly hitting the hypervisors, not testing extensions not
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included in the OpenStack base. If there are some features of
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OpenStack that are not verifiable through standard interfaces, this
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should be considered a possible enhancement.
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- Tempest strives for complete coverage of the OpenStack API and
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common scenarios that demonstrate a working cloud.
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- Tempest drives load in an OpenStack cloud. By including a broad
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array of API and scenario tests Tempest can be reused in whole or in
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parts as load generation for an OpenStack cloud.
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- Tempest should attempt to clean up after itself, whenever possible
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we should tear down resources when done.
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- Tempest should be self-testing.
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Quickstart
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----------
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To run Tempest, you first need to create a configuration file that will tell
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Tempest where to find the various OpenStack services and other testing behavior
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switches. Where the configuration file lives and how you interact with it
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depends on how you'll be running Tempest. There are 2 methods of using Tempest.
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The first, which is a newer and recommended workflow treats Tempest as a system
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installed program. The second older method is to run Tempest assuming your
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working dir is the actually Tempest source repo, and there are a number of
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assumptions related to that. For this section we'll only cover the newer method
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as it is simpler, and quicker to work with.
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#. You first need to install Tempest. This is done with pip after you check out
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the Tempest repo::
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$ git clone https://github.com/openstack/tempest/
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$ pip install tempest/
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This can be done within a venv, but the assumption for this guide is that
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the Tempest cli entry point will be in your shell's PATH.
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#. Installing Tempest will create a /etc/tempest dir which will contain the
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sample config file packaged with Tempest. The contents of /etc/tempest will
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be copied to all local working dirs, so if there is any common configuration
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you'd like to be shared between anyone setting up local Tempest working dirs
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it's recommended that you copy or rename tempest.conf.sample to tempest.conf
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and make those changes to that file in /etc/tempest
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#. Setup a local working Tempest dir. This is done using the tempest init
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command::
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tempest init cloud-01
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works the same as::
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mkdir cloud-01 && cd cloud-01 && tempest init
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This will create a new directory for running a single Tempest configuration.
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If you'd like to run Tempest against multiple OpenStack deployments the idea
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is that you'll create a new working directory for each to maintain separate
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configuration files and local artifact storage for each.
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#. Then cd into the newly created working dir and also modify the local
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config files located in the etc/ subdir created by the ``tempest init``
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command. Tempest is expecting a tempest.conf file in etc/ so if only a
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sample exists you must rename or copy it to tempest.conf before making
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any changes to it otherwise Tempest will not know how to load it.
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#. Once the configuration is done you're now ready to run Tempest. This can
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be done with testr directly or any `testr`_ based test runner, like
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`ostestr`_. For example, from the working dir running::
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$ ostestr --regex '(?!.*\[.*\bslow\b.*\])(^tempest\.(api|scenario))'
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will run the same set of tests as the default gate jobs.
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.. _testr: https://testrepository.readthedocs.org/en/latest/MANUAL.html
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.. _ostestr: http://docs.openstack.org/developer/os-testr/
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Configuration
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-------------
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Detailed configuration of Tempest is beyond the scope of this
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document see :ref:`tempest-configuration` for more details on configuring
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Tempest. The etc/tempest.conf.sample attempts to be a self-documenting version
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of the configuration.
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You can generate a new sample tempest.conf file, run the following
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command from the top level of the Tempest directory:
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tox -egenconfig
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The most important pieces that are needed are the user ids, openstack
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endpoint, and basic flavors and images needed to run tests.
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Unit Tests
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----------
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Tempest also has a set of unit tests which test the Tempest code itself. These
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tests can be run by specifying the test discovery path::
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$> OS_TEST_PATH=./tempest/tests testr run --parallel
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By setting OS_TEST_PATH to ./tempest/tests it specifies that test discover
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should only be run on the unit test directory. The default value of OS_TEST_PATH
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is OS_TEST_PATH=./tempest/test_discover which will only run test discover on the
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Tempest suite.
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Alternatively, you can use the run_tests.sh script which will create a venv and
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run the unit tests. There are also the py27 and py34 tox jobs which will run
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the unit tests with the corresponding version of python.
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Python 2.6
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----------
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Starting in the kilo release the OpenStack services dropped all support for
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python 2.6. This change has been mirrored in Tempest, starting after the
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tempest-2 tag. This means that proposed changes to Tempest which only fix
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python 2.6 compatibility will be rejected, and moving forward more features not
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present in python 2.6 will be used. If you're running your OpenStack services
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on an earlier release with python 2.6 you can easily run Tempest against it
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from a remote system running python 2.7. (or deploy a cloud guest in your cloud
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that has python 2.7)
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Python 3.4
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----------
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Starting during the Liberty release development cycle work began on enabling
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Tempest to run under both Python 2.7 and Python 3.4. Tempest strives to fully
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support running with Python 3.4. A gating unit test job was added to also run
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Tempest's unit tests under Python 3.4. This means that the Tempest code at
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least imports under Python 3.4 and things that have unit test coverage will
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work on Python 3.4. However, because large parts of Tempest are self-verifying
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there might be uncaught issues running on Python 3.4. So until there is a gating
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job which does a full Tempest run using Python 3.4 there isn't any guarantee
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that running Tempest under Python 3.4 is bug free.
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Legacy run method
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-----------------
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The legacy method of running Tempest is to just treat the Tempest source code
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as a python unittest repository and run directly from the source repo. When
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running in this way you still start with a Tempest config file and the steps
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are basically the same except that it expects you know where the Tempest code
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lives on your system and requires a bit more manual interaction to get Tempest
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running. For example, when running Tempest this way things like a lock file
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directory do not get generated automatically and the burden is on the user to
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create and configure that.
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To start you need to create a configuration file. The easiest way to create a
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configuration file is to generate a sample in the ``etc/`` directory ::
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$> cd $TEMPEST_ROOT_DIR
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$> oslo-config-generator --config-file \
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etc/config-generator.tempest.conf \
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--output-file etc/tempest.conf
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After that, open up the ``etc/tempest.conf`` file and edit the
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configuration variables to match valid data in your environment.
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This includes your Keystone endpoint, a valid user and credentials,
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and reference data to be used in testing.
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.. note::
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If you have a running devstack environment, Tempest will be
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automatically configured and placed in ``/opt/stack/tempest``. It
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will have a configuration file already set up to work with your
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devstack installation.
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Tempest is not tied to any single test runner, but `testr`_ is the most commonly
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used tool. Also, the nosetests test runner is **not** recommended to run Tempest.
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After setting up your configuration file, you can execute the set of Tempest
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tests by using ``testr`` ::
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$> testr run --parallel
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To run one single test serially ::
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$> testr run tempest.api.compute.servers.test_servers_negative.ServersNegativeTestJSON.test_reboot_non_existent_server
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Alternatively, you can use the run_tempest.sh script which will create a venv
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and run the tests or use tox to do the same. Tox also contains several existing
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job configurations. For example::
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$> tox -efull
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which will run the same set of tests as the OpenStack gate. (it's exactly how
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the gate invokes Tempest) Or::
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$> tox -esmoke
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to run the tests tagged as smoke.
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