Continuous Integration & Deployment

Bedrock runs a series of automated tests as part of continuous integration workflow and Deployment Pipeline. You can learn more about each of the individual test suites by reading their respective pieces of documentation:

Tests in the lifecycle of a change

Below is an overview of the tests during the lifecycle of a change to bedrock:

Local development

The change is developed locally, and page specific integration tests can be executed against a locally running instance of the application. If testing changes to the website as a whole is required, then pushing changes to the special run-integration-tests branch (see below) is much faster than running the full test suite locally.

Pull request

Once a pull request is submitted, CircleCI will run both the Python and JavaScript unit tests, as well as the suite of redirect headless HTTP(s) response checks.

Push to master branch

Whenever a change is pushed to the master branch, a new image is built and deployed to the dev environment, and the full suite of headless and UI tests are run. This is handled by the pipeline, and is subject to change according to the settings in the .gitlab-ci.yml file in the www-config repository.

The tests for the dev environment are currently configured as follows:

  • Chrome (latest) via local Selenium grid.

  • Firefox (latest) via local Selenium grid.

  • Internet Explorer 11 (smoke tests) via Sauce Labs.

  • Internet Explorer 9 (sanity tests) via Sauce Labs.

  • Headless tests.

If you view a job’s pipeline configuration, you will also notice there are manual tests that can be run via SauceLabs for Firefox, Chrome, Edge, and Download tests. These tests aren’t run automatically and will not block a deployment, but they can be useful if you want to run an extra set of checks should you see a test failure and want some verification.

Push to stage branch

Whenever a change is pushed to the stage branch, a production docker image is built, published to Docker Hub, and deployed to a public staging environment. Once the new image is deployed, the full suite of UI tests is run against it again, but this time with the addition of the headless download tests.

Push to prod branch (tagged)

When a tagged commit is pushed to the prod branch, a production docker image is built and published to Docker Hub if needed (usually this will have already happened as a result of a push to the stage branch), and deployed to each production deployment. After each deployment is complete, the full suite of UI tests is run again (the same as for stage). As with untagged pushes, this is all handled by the pipeline, and is subject to change according to the settings in the .gitlab-ci.yml file in the www-config repository.

Push to prod cheat sheet

  1. Check out the master branch

  2. Make sure the master branch is up to date with mozilla/bedrock master

  3. Check that dev deployment is green:
    1. View deployment pipeline and look at master branch

  4. Tag and push the deployment by running bin/tag-release.sh --push

Note

By default the tag-release.sh script will push to the origin git remote. If you’d like for it to push to a different remote name you can either pass in a -r or --remote argument, or set the MOZ_GIT_REMOTE environment variable. So the following are equivalent:

$ bin/tag-release.sh --push -r mozilla
$ MOZ_GIT_REMOTE=mozilla bin/tag-release.sh --push

And if you’d like to just tag and not push the tag anywhere, you may omit the --push parameter.

Instance Configuration & Switches

We have a separate repo for configuring our primary instances (dev, stage, and prod). The docs for updating configurations in that repo are on their own page, but there is a way to tell what version of the configuration is in use on any particular instance of bedrock. You can go to the /healthz-cron/ URL on an instance (see prod for example) to see the current commit of all of the external Git repos in use by the site and how long ago they were updated. The info on that page also includes the latest version of the database in use, the git revision of the bedrock code, and how long ago the database was updated. If you recently made a change to one of these repos and are curious if the changes have made it to production, this is the URL you should check.

Updating Selenium

There are several components for Selenium, which are independently versioned. The first is the Python client, and this can be updated via the test dependencies. The other components are the Selenium versions used in both SauceLabs and the local Selenium grid. These versions are selected automatically based on the required OS / Browser configuration, so they should not need to be updated or specified independently.

Adding test runs

Test runs can be added by creating a new job in the .gitlab-ci.yml file in the www-config repository with the desired variables. For example, if you wanted to run the smoke tests in IE10, you could create the following clauses:

.ie10:
  variables:
    BROWSER_NAME: internet explorer
    BROWSER_VERSION: "10.0"
    PLATFORM: Windows 8
    MARK_EXPRESSION: smoke

test-ie10-saucelabs:
  extends:
    - .test
    - .ie10
    - .saucelabs

You can use Sauce Labs platform configurator to help with the parameter values.

Pushing to the integration tests branch

If you have commit rights to our Github repo (mozilla/bedrock) you can simply push your branch to the branch named run-integration-tests, and the app will be deployed and the full suite of integration tests for that branch will be run. Please announce in our Slack channel (#www on mozilla.slack.com) that you’ll be doing this so that we don’t get conflicts.