Antrea CI

This directory includes all the scripts required to run CI on Antrea.

For information about our Jenkins CI jobs and how to run the same tests locally, see here.

For K8s conformance upstream tests, the version of the K8s conformance container image will be determined at runtime according to the Kubernetes server's version.

Antrea test suite

We run 4 different categories of tests as part of CI:

• unit tests: most Go packages for Antrea include some unit tests written using the Go testing package. Unit tests typically rely on mock testing to isolate the package being tested, and abstract platform-specific functionality hidden behind interfaces. When adding a new package or modifying an existing one, add the appropriate unit tests.
• integration tests: these tests are located under test/integration and are also written using the Go testing package. Unlike unit tests, they typically exercise multiple Go packages to ensure that they are working correctly together. In the case of Antrea, integration tests may create an actual OVS bridge, which is why they depend on the OVS daemons running, and are typically run inside a Docker image, even on Linux. Write integration tests when you require an actual OVS bridge or you need access to platform-specific utilities.
• end-to-end (e2e) tests: these tests are located under test/e2e and are also written using the Go testing package. Unlike the two previous test categories, these assume that Antrea is running on an actual cluster and require a kubeconfig file as well as SSH access to the cluster Nodes. Instructions on how to run these tests, including how to setup a local Kubernetes cluster, can be found in test/e2e/README.md. Typical use cases for e2e tests include: validate the Antrea manifest and ensure Antrea components can be deployed successfully, check end-to-end connectivity for different types of traffic (e.g. Pod-to-Pod, Pod-to-Service), validate the implementation of Antrea-speicifc APIs (e.g. ClusterNetworkPolicy, Traceflow, ...).
• Kubernetes upstream tests: our CI relies on Kubernetes community tests to ensure conformance and validate the implementation of the NetworkPolicy API.

The table below recaps the different categories of tests and indicates how to run them locally:

Test category	Location	How to run locally	Automation
unit tests	most Go packages	make test-unit (Linux) / make docker-test-unit	Github Actions
integration tests	test/integration	make docker-test-integration	Github Actions
e2e tests	test/e2e	see test/e2e/README.md	Github Actions (Kind cluster) + Jenkins
Kubernetes upstream tests	upstream Kubernetes	see ci/jenkins/README.md	Jenkins

Go linters

As part of CI, we run the following linters via golangci-lint:

• misspell - Finds commonly misspelled English words in comments.
• gofmt - Checks whether code was gofmt-ed.
• unused - Finds unused code.
• staticcheck - Static analysis toolset with a large number of tests.
• gosec - Checks for common security problems.
• goimports - A superset of gofmt organizes imports and checks for unused ones.
• go vet - Examines Go source code and reports suspicious constructs.

You can run the linters locally with make golangci from the root of the repository. Some issues can be fixed automatically for you if you run make golangci-fix.

See our golangci-lint configuration file for more details.

You can also run the golint linter with make lint to see suggestions about how to improve your code, and we encourage you to do so when submitting a patch. The reason why we do not run this linter by default in CI is that, unlike gofmt, it is not considered trustworthy enough for its suggestions to be enforced automatically.

Markdown formatting

As part of CI, we run markdownlint through the markdownlint CLI to ensure consistent formatting of the documentation and compatibility with Markdown rendering tools (and in particular the ones we use for the Antrea website).

To install the CLI locally, follow these instructions. You can then validate your changes to the documentation with make markdownlint. Note that some formatting errors can be fixed automatically with make markdownlint-fix.