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cert-manager/testing

This repository contains the configuration used for testing all jetstck projects.

It is used by Prow to provide GitHub automation to all of our repositories.

Common tasks

Linting files in this repository

We have certain requirements on files in these repository:

  • boilerplate check - we require that all files in the repository have a valid copyright notice at the top of the file.
  • prowgen check - we require that all cert-manager job configuration files are generated using prowgen.

You can run the lint checks with:

make verify

Validating Prow configuration

In order to test the configuration is valid, you can run:

make local-checkconfig

This will use the test-infra 'checkconfig' tool to verify the configuration files.

Deploying a new version of Prow

Prow's deployment on our prow-untrusted cluster is done manually using a Makefile in ./prow/cluster.

See more detailed information about upgrading Prow in ./prow/cluster/README.md

Building an image and exporting to your local Docker daemon

Each directory under images/ contains a configuration file that define how each image should be built.

You can build these images and store them within your local docker daemon by running:

$ ./images/image-builder-script/builder.sh images/golang-dind
./images/image-builder-script/builder.sh images/golang-aws
WARNING: GOOGLE_APPLICATION_CREDENTIALS not set
Executing builder...
2023/04/07 16:31:51 --confirm is set to false, not pushing images
...

This may take a few minutes depending on the state of your Docker cache.

Pushing a docker image to the image repository

⚠️ WARNING: You're unlikely to have permissions to be able to push images to GCR locally. If you're simply looking to update an image, a workload in prow will build and push the image for you when your PR with the changes is merged.

builder.sh can also be used to push built docker images to the remote registry.

This push target will not handle authentication with the remote registry for you. You should ensure your Docker client is already authenticated using gcloud.

For example, to build and push the images/golang-aws image:

# Obtain credentials for the docker registry
$ gcloud docker -a
# Build (if required) and push the docker image
$ ./images/image-builder-script/builder.sh images/golang-aws --confirm=true
...

If you want to push to a custom repository, you can use the --registry flag.

Structure

  • config/: Adding or modifying CI jobs (presubmits, periodics or postsubmits)
  • prow/: Updating/upgrading Prow
  • images/: Creating or modifying images used during CI

hack/

This contains support scripts used to verify aspects of the repository.

config/

The config directory contains the actual Prow configuration files: config.yaml and plugins.yaml, as well as job configuration for presubmits, periodics and postsubmits.

Pull requests can be submitted to this directory in order to modify how tests are run.

Once your changes have been merged, Prow itself will automatically update its configuration to reflect what is in the repository.

images/

This directory contains image defintions for images used as part of Prow jobs.

New images will be built and pushed on changes to the relevant files (i.e Dockerfile for the image).

Debugging e2e tests run with Prow

  • For each e2e test run, Prow will create a new ProwJob custom resource in prow-trusted cluster. For the actual test, a pod will be spun up in prow-untrusted cluster in test-pods namespace. You can find the pod's name from the ProwJob's yaml kubectl get prowjob <prowjob-name> -ojsonpath='{.status.pod_name}'

  • When debugging a periodic Prow test, a new test run can be triggered by deleting the latest ProwJob for that test

  • The image used for the test container has bash, so a running test can be easily debugged by execing the container kubectl exec -it <pod-name> -ctest -ntest-pods -- bash

Testing locally

ProwJobs can be tested locally by running the (interactive) ./prow/pj-on-kind.sh script. This script will spin up a local KIND cluster and create a new ProwJob instance for which there will be a Pod created that will be running the actual test.

See documentation in k/test-infra for how the script works.

An example of running pull-cert-manager-upgrade-v1-21 job locally:

  1. Run ./prow/pj-on-kind.sh pull-cert-manager-upgrade-v1-21
  2. Pass some cert-manager PR number when requested. This will be checked out.
  3. Pass 'empty' for any storage volumes when requested.
  4. Retrieve kubeconfig for the kind cluster kind get kubeconfig --name mkpod and set KUBECONFIG
  5. kubectl get pods - to get the name of the pod that is running the test
  6. kubectl logs <pod-name> -c test -f stream the logs