Integration tests
Topics
The Ansible integration Test system.
Tests for playbooks, by playbooks.
Some tests may require credentials. Credentials may be specified with credentials.yml.
Some tests may require root.
Note
Every new module and plugin should have integration tests, even if the tests cannot be run on Ansible CI infrastructure.
In this case, the tests should be marked with the unsupported alias in aliases file.
Quick Start
It is highly recommended that you install and activate the argcomplete python package.
It provides tab completion in bash for the ansible-test test runner.
Configuration
ansible-test command
The example below assumes bin/ is in your $PATH. An easy way to achieve that
is to initialize your environment with the env-setup command:
source hacking/env-setup
ansible-test --help
You can also call ansible-test with the full path:
bin/ansible-test --help
integration_config.yml
Making your own version of integration_config.yml can allow for setting some
tunable parameters to help run the tests better in your environment. Some
tests (for example, cloud tests) will only run when access credentials are provided. For more
information about supported credentials, refer to the various cloud-config-*.template
files in the test/integration/ directory.
Prerequisites
Some tests assume things like hg, svn, and git are installed, and in path. Some tests (such as those for Amazon Web Services) need separate definitions, which will be covered later in this document.
(Complete list pending)
Non-destructive Tests
These tests will modify files in subdirectories, but will not do things that install or remove packages or things outside of those test subdirectories. They will also not reconfigure or bounce system services.
Note
Running integration tests within Docker
To protect your system from any potential changes caused by integration tests, and to ensure a sensible set of dependencies are available we recommend that you always run integration tests with the --docker option, for example --docker centos8. See the list of supported docker images for options (the default image is used for sanity and unit tests, as well as for platform independent integration tests such as those for cloud modules).
Note
Avoiding pulling new Docker images
Use the --docker-no-pull option to avoid pulling the latest container image. This is required when using custom local images that are not available for download.
Run as follows for all POSIX platform tests executed by our CI system in a fedora32 docker container:
ansible-test integration shippable/ --docker fedora32
You can target a specific tests as well, such as for individual modules:
ansible-test integration ping
You can use the -v option to make the output more verbose:
ansible-test integration lineinfile -vvv
Use the following command to list all the available targets:
ansible-test integration --list-targets
Note
Bash users
If you use bash with argcomplete, obtain a full list by doing: ansible-test integration <tab><tab>
Destructive Tests
These tests are allowed to install and remove some trivial packages. You will likely want to devote these to a virtual environment, such as Docker. They won’t reformat your filesystem:
ansible-test integration destructive/ --docker fedora32
Windows Tests
These tests exercise the winrm connection plugin and Windows modules. You’ll
need to define an inventory with a remote Windows 2008 or 2012 Server to use
for testing, and enable PowerShell Remoting to continue.
Running these tests may result in changes to your Windows host, so don’t run them against a production/critical Windows environment.
Enable PowerShell Remoting (run on the Windows host via Remote Desktop):
Enable-PSRemoting -Force
Define Windows inventory:
cp inventory.winrm.template inventory.winrm
${EDITOR:-vi} inventory.winrm
Run the Windows tests executed by our CI system:
ansible-test windows-integration -v shippable/
Tests in Docker containers
If you have a Linux system with Docker installed, running integration tests using the same Docker containers used by the Ansible continuous integration (CI) system is recommended.
Note
Docker on non-Linux
Using Docker Engine to run Docker on a non-Linux host (such as macOS) is not recommended.
Some tests may fail, depending on the image used for testing.
Using the --docker-privileged option when running integration (not network-integration or windows-integration) may resolve the issue.
Running Integration Tests
To run all CI integration test targets for POSIX platforms in a Ubuntu 18.04 container:
ansible-test integration shippable/ --docker ubuntu1804
You can also run specific tests or select a different Linux distribution.
For example, to run tests for the ping module on a Ubuntu 18.04 container:
ansible-test integration ping --docker ubuntu1804
Legacy Cloud Tests
Some of the cloud tests run as normal integration tests, and others run as legacy tests; see the Testing using the Legacy Integration system page for more information.
Other configuration for Cloud Tests
In order to run some tests, you must provide access credentials in a file named
cloud-config-aws.yml or cloud-config-cs.ini in the test/integration
directory. Corresponding .template files are available for for syntax help. The newer AWS
tests now use the file test/integration/cloud-config-aws.yml
IAM policies for AWS
Ansible needs fairly wide ranging powers to run the tests in an AWS account. This rights can be provided to a dedicated user. These need to be configured before running the test.
testing-policies
The GitHub repository mattclay/aws-terminator contains two sets of policies used for all existing AWS module integratoin tests. The hacking/aws_config/setup_iam.yml playbook can be used to setup two groups:
ansible-integration-ci will have the policies applied necessary to run any integration tests not marked as unsupported and are designed to mirror those used by Ansible’s CI.
ansible-integration-unsupported will have the additional policies applied necessary to run the integration tests marked as unsupported including tests for managing IAM roles, users and groups.
Once the groups have been created, you’ll need to create a user and make the user a member of these groups. The policies are designed to minimize the rights of that user. Please note that while this policy does limit the user to one region, this does not fully restrict the user (primarily due to the limitations of the Amazon ARN notation). The user will still have wide privileges for viewing account definitions, and will also able to manage some resources that are not related to testing (for example, AWS lambdas with different names). Tests should not be run in a primary production account in any case.
Other Definitions required
Apart from installing the policy and giving it to the user identity running the tests, a lambda role ansible_integration_tests has to be created which has lambda basic execution privileges.
Network Tests
For guidance on writing network test see Resource module integration tests.
Where to find out more
If you’d like to know more about the plans for improving testing Ansible, join the Testing Working Group.