openstack-ansible/doc/source/contributor/testing.rst

Testing

Adding tests to a new role

Each of the role tests is in its tests/ folder.

This folder contains at least the following files:

• test.yml ("super" playbook acting as test router to sub-playbooks)
• <role name>-overrides.yml. This var file is automatically loaded by our shell script in our tests repository.
• inventory. A static inventory for role testing. It's possible some roles have multiple inventories. See for example the neutron role with its lxb_inventory.
• group_vars and host_vars. These folders will hold override the necessary files for testing. For example, this is where you override the IP addresses, IP ranges, and ansible connection details.
• ansible-role-requirements.yml. This should be fairly straightforward: this file contains all the roles to clone before running your role. The roles' relative playbooks will have to be listed in the test.yml file. However, keep in mind to NOT re-invent the wheel. For example, if your role needs keystone, you don't need to create your own keystone install playbook, because we have a generic keystone install playbook in the tests repository.
• Only add a zuul.d folder when your role is imported into the openstack-ansible namespace.

Extending tests of an existing role

1. Modify the tox.ini to add your new scenario. If required, you can override the inventory, and/or the variable files.
2. Add a new non-voting job in zuul.d/jobs.yaml, and wire it in the project tests file zuul.d/project.yaml.

Improve testing with tempest

Once the initial convergence is working and the services are running, the role development should focus on implementing some level of functional testing.

Ideally, the functional tests for an OpenStack role should make use of Tempest to execute the functional tests. The ideal tests to execute are scenario tests as they test the functions that the service is expected to do in a production deployment. In the absence of any scenario tests for the service a fallback option is to implement the smoke tests instead.

If no tempest is provided, some other functional testing should be done. For APIs, you can probably check the HTTP response codes, with specially crafted requests.

Running tests locally

Linting

Python coding conventions are tested using PEP8, with the following convention exceptions:

• F403 - 'from ansible.module_utils.basic import *'

Testing may be done locally by executing:

./run_tests.sh pep8

Bash coding conventions are tested using Bashate, with the following convention exceptions:

• E003: Indent not multiple of 4. We prefer to use multiples of 2 instead.

• E006: Line longer than 79 columns. As many scripts are deployed as templates

  and use jinja templating, this is very difficult to achieve. It is still considered a preference and should be a goal to improve readability, within reason.

• E040: Syntax error determined using bash -n. As many scripts are deployed

  as templates and use jinja templating, this will often fail. This test is reasonably safely ignored as the syntax error will be identified when executing the resulting script.

Testing may be done locally by executing:

./run_tests.sh bashate

Ansible is lint tested using ansible-lint.

Testing may be done locally by executing:

./run_tests.sh ansible-lint

Ansible playbook syntax is tested using ansible-playbook.

Testing may be done locally by executing:

./run_tests.sh ansible-syntax

A consolidated set of all lint tests may be done locally by executing:

./run_tests.sh linters

Documentation building

Documentation is developed in reStructuredText (RST) and compiled into HTML using Sphinx.

Documentation may be built locally by executing:

./run_tests.sh docs

The OpenStack-Ansible integrated repo also has an extra documentation building process, to build the deployment guide.

This guide may be built locally by executing:

./run_tests.sh deploy-guide

Release notes building

Release notes are generated using the the reno tool and compiled into HTML using Sphinx.

Release notes may be built locally by executing:

./run_tests.sh releasenotes

Note

The releasenotes build argument only tests committed changes. Ensure your local changes are committed before running the releasenotes build.

Roles functional or scenario testing

To run a functional test of the role, execute:

./run_tests.sh functional

Testing a new role with an AIO

1. Include your role on the deploy host. See also extend_osa_roles.

2. Perform any other host preparation (such as the tasks performed by the bootstrap-aio.yml playbook). This includes any preparation tasks that are particular to your service.

3. Generate files to include your service in the Ansible inventory using env.d and conf.d files for use on your deploy host.

   Hint

   You can follow examples from other roles, making the appropriate modifications being sure that group labels in env.d and conf.d files are consistent.

   Hint

   A description of how these work can be found in inventory-confd and inventory-envd.

4. Generate secrets, if any, as described in the :deploy_guide:Configure Service Credentials <configure.html#configuring-service-credentials>. You can append your keys to an existing user_secrets.yml file or add a new file to the openstack_deploy directory to contain them. Provide overrides for any other variables you will need at this time as well, either in user_variables.yml or another file.

   See also our user-overrides page.

   Any secrets required for the role to work must be noted in the etc/openstack_deploy/user_secrets.yml file for reuse by other users.

5. If your service is installed from source or relies on python packages which need to be installed from source, specify a repository for the source code of each requirement by adding a file to your deploy host under inventory/group_vars/<service_group>/source_git.yml in the OpenStack-Ansible source repository and following the pattern of files currently in that directory. You could also simply add an entry to an existing file there.

6. Make any required adjustments to the load balancer configuration (e.g. modify inventory/group_vars/all/haproxy.yml in the OpenStack-Ansible source repository on your deploy host) so that your service can be reached through a load balancer, if appropriate, and be sure to run the haproxy-install.yml play later so your changes will be applied. Please note, you can also use haproxy_extra_services variable if you don't want to provide your service as default for everyone.

7. Put together a service install playbook file for your role. This can also be modeled from any existing service playbook that has similar dependencies to your service (database, messaging, storage drivers, container mount points, etc.). A common place to keep playbook files in a Galaxy role is in an examples directory off the root of the role. If the playbook is meant for installing an OpenStack service, name it os-<service>-install.yml and target it at the appropriate group defined in the service env.d file. It is crucial that the implementation of the service is optional and that the deployer must opt-in to the deployment through the population of a host in the applicable host group. If the host group has no hosts, Ansible skips the playbook's tasks automatically.

8. Any variables needed by other roles to connect to the new role, or by the new role to connect to other roles, should be implemented in inventory/group_vars. The group vars are essentially the glue which playbooks use to ensure that all roles are given the appropriate information. When group vars are implemented it should be a minimum set to achieve the goal of integrating the new role into the integrated build.

9. Documentation must be added in the role to describe how to implement the new service in an integrated environement. This content must adhere to the documentation. Until the role has integrated functional testing implemented (see also the Role development maturity paragraph), the documentation must make it clear that the service inclusion in OpenStack-Ansible is experimental and is not fully tested by OpenStack-Ansible in an integrated build. Alternatively, an user story can be created.

10. A feature release note must be added to announce the new service availability and to refer to the role documentation for further details. This content must adhere to the documentation.

11. It must be possible to execute a functional, integrated test which executes a deployment in the same way as a production environment. The test must execute a set of functional tests using Tempest. This is the required last step before a service can remove the experimental warning from the documentation.

Hint

If you adhere to the pattern of isolating your role's extra deployment requirements (secrets and var files, HAProxy yml fragments, repo_package files, etc.) in their own files it makes it easy for you to automate these additional steps when testing your role.

Integrated repo functional or scenario testing

To test the integrated repo, follow the :deploy_guide:Deployment Guide <index.html>

Alternatively, you can check the aio guide<quickstart-aio>, or even run the gate wrapper script, named scripts/gate-check-commit.sh, described below.

The OpenStack Infrastructure automated tests

There should be no difference between running tests in the openstack infrastructure, versus running locally.

The tests in the openstack infrastructure are triggered by jobs defined in each repo zuul.d folder.

See also the zuul user guide.

However, for reliability purposes, a few variables are defined to point to the OpenStack infra pypi and packages mirrors.

The integrated repo functional test is using the scripts/gate-check-commit.sh script, which receives arguments from the zuul run playbook definition.

While this script is primarily developed and maintained for use in OpenStack-CI, it can be used in other environments.

Role development maturity

A role may be fully mature, even if it is not integrated in the openstack-ansible repository. The maturity depends on its testing levels.

A role can be in one of the four maturity levels:

• Complete
• Incubated
• Unmaintained
• Retired

Here are a series of rules that define maturity levels:

• A role can be retired at any time if it is not relevant anymore.
• A role can be Incubated for maximum 2 cycles.
• An Incubated role that passes functional testing will be upgraded to the Complete status, and cannot return in Incubated status.
• An Incubated role that didn't implement functional testing in the six month timeframe will become Unmaintained.
• A role in Complete status can be downgraded to Unmaintained. status, according to the maturity downgrade procedure.

Maturity downgrade procedure

If a role has failed periodics or gate test for two weeks, a bug should be filed, and a message to the mailing list will be sent, referencing the bug.

The next community meeting should discuss about role deprecation, and if no contributor comes forward to fix the role, periodic testing will be turned off, and the role will move to an unmaintained state.

Maturity Matrix

All of the OpenStack-Ansible roles do not have the same level of maturity and testing.

Here is a dashboard of the current status of the roles: