This is a set of integration tests to be run against a live OpenStack cluster. Tempest has batteries of tests for OpenStack API validation, Scenarios, and other specific tests useful in validating an OpenStack deployment.
Tempest Design Principles that we strive to live by.
To run Tempest, you first need to create a configuration file that will tell Tempest where to find the various OpenStack services and other testing behavior switches.
The easiest way to create a configuration file is to copy the sample one in the etc/ directory
$> cd $TEMPEST_ROOT_DIR $> cp etc/tempest.conf.sample etc/tempest.conf
After that, open up the etc/tempest.conf file and edit the configuration variables to match valid data in your environment. This includes your Keystone endpoint, a valid user and credentials, and reference data to be used in testing.
If you have a running devstack environment, Tempest will be automatically configured and placed in /opt/stack/tempest. It will have a configuration file already set up to work with your devstack installation.
Tempest is not tied to any single test runner, but testr is the most commonly used tool. Also, the nosetests test runner is not recommended to run Tempest.
After setting up your configuration file, you can execute the set of Tempest tests by using testr
$> testr run --parallel
To run one single test serially
$> testr run tempest.api.compute.servers.test_servers_negative.ServersNegativeTestJSON.test_reboot_non_existent_server
Alternatively, you can use the run_tempest.sh script which will create a venv and run the tests or use tox to do the same. Tox also contains several existing job configurations. For example:
$> tox -efull
which will run the same set of tests as the OpenStack gate. (it’s exactly how the gate invokes Tempest) Or:
$> tox -esmoke
to run the tests tagged as smoke.
Detailed configuration of Tempest is beyond the scope of this document see Tempest Configuration Guide for more details on configuring Tempest. The etc/tempest.conf.sample attempts to be a self documenting version of the configuration.
You can generate a new sample tempest.conf file, run the following command from the top level of the Tempest directory:
The most important pieces that are needed are the user ids, openstack endpoint, and basic flavors and images needed to run tests.
Tempest also has a set of unit tests which test the Tempest code itself. These tests can be run by specifing the test discovery path:
$> OS_TEST_PATH=./tempest/tests testr run --parallel
By setting OS_TEST_PATH to ./tempest/tests it specifies that test discover should only be run on the unit test directory. The default value of OS_TEST_PATH is OS_TEST_PATH=./tempest/test_discover which will only run test discover on the Tempest suite.
Alternatively, you can use the run_tests.sh script which will create a venv and run the unit tests. There are also the py27 and py34 tox jobs which will run the unit tests with the corresponding version of python.
Starting in the kilo release the OpenStack services dropped all support for python 2.6. This change has been mirrored in Tempest, starting after the tempest-2 tag. This means that proposed changes to Tempest which only fix python 2.6 compatibility will be rejected, and moving forward more features not present in python 2.6 will be used. If you’re running your OpenStack services on an earlier release with python 2.6 you can easily run Tempest against it from a remote system running python 2.7. (or deploy a cloud guest in your cloud that has python 2.7)
Starting during the Liberty release development cycle work began on enabling Tempest to run under both Python 2.7 and Python 3.4. Tempest strives to fully support running with Python 3.4. A gating unit test job was added to also run Tempest’s unit tests under Python 3.4. This means that the Tempest code at least imports under Python 3.4 and things that have unit test coverage will work on Python 3.4. However, because large parts of Tempest are self verifying there might be uncaught issues running on Python 3.4. So until there is a gating job which does a full Tempest run using Python 3.4 there isn’t any guarantee that running Tempest under Python 3.4 is bug free.