hydrophone

Lightweight runner for kubernetes tests. Uses the conformance image(s) released by the kubernetes release team to either run individual tests or the entire Conformance suite. Design is pretty simple, it starts the conformance image as a pod in the conformance namespace, waits for it to finish and then prints out the results.

Project Goals

• Simplified Kubernetes Testing: Easy-to-use tool for running Kubernetes conformance tests.
• Official Conformance Images: Utilize official conformance images from the Kubernetes Release Team.
• Flexible Test Execution: Ability to run individual test, the entire Conformance Test Suite, or anything in between.

Project Non-Goals

• Replacing Kubernetes Testing Frameworks: Not intended to replace existing frameworks, but to complement them.
• Extensive Test Development: Focus is on running existing tests, not developing new ones.
• Broad Tool Integration: Limited integration with third-party tools; maintains simplicity.

Build

$ make build
go build -o bin/hydrophone main.go

Install

go install sigs.k8s.io/hydrophone@latest

Command line options

$ bin/hydrophone --help
Usage of bin/hydrophone:
  -busybox-image string
        specify an alternate busybox container image. (default "registry.k8s.io/e2e-test-images/busybox:1.36.1-1")
  -cleanup
        cleanup resources (pods, namespaces etc).
  -conformance
        run conformance tests.
  -conformance-image string
        specify a conformance container image of your choice. (default "registry.k8s.io/conformance:v1.29.0")
  -dry-run
        run in dry run mode.
  -focus string
        focus runs a specific e2e test. e.g. - sig-auth. allows regular expressions.
  -kubeconfig string
        path to the kubeconfig file.
  -list-images
        list all images that will be used during conformance tests.
  -output-dir string
        directory for logs. (defaults to current directory)
  -parallel int
        number of parallel threads in test framework. (default 1)
  -skip string
        skip specific tests. allows regular expressions.
  -test-repo string
        alternate registry for test images
  -test-repo-list string
        yaml file to override registries for test images
  -verbosity int
        verbosity of test framework. (default 4)

Run

Ensure there is a KUBECONFIG environment variable specified or $HOME/.kube/config file present before running hydrophone Alternatively, you can specify the path to the kubeconfig file with the --kubeconfig option.

To run conformance tests use:

bin/hydrophone --conformance

To run a specific test use:

bin/hydrophone --focus 'Simple pod should contain last line of the log'

To specify a version of conformance image use:

bin/hydrophone --conformance-image 'registry.k8s.io/conformance:v1.29.0'

Troubleshooting

Check if the pod is running:

kubectl get pods -n conformance

use kubectl logs or kubectl exec to see what is happening in the pod.

Cleanup

Delete the pod

kubectl delete -n conformance pods/e2e-conformance-test

Delete the namespace

kubectl delete -n conformance pods/e2e-conformance-test && kubectl delete ns conformance

Community

Please reach out for bugs, feature requests, and other issues! The maintainers of this project are reachable via:

• Kubernetes Slack in the [#sig-testing] and [#k8s-conformance] channels
• filing an issue against this repo
• The Kubernetes SIG-Testing Mailing List and SIG-Release Mailing List

Current maintainers are @dims and @rjsadow - feel free to reach out if you have any questions!

Pull Requests are very welcome! If you're planning a new feature, please file an issue to discuss first.

Check the issue tracker for help wanted issues if you're unsure where to start, or feel free to reach out to discuss. 🙂

See also: our own contributor guide and the Kubernetes community page.

Code of conduct

Participation in the Kubernetes community is governed by the Kubernetes Code of Conduct.