Merge branch 'main' into rmdir-support

CONTRIBUTING.md

@@ -113,6 +113,25 @@ For example, a test which only tests sanity of the ephemeral container feature s
 
 On Linux, running tests may exhaust a large amount of RAM and crash the machine. To prevent this, limit the number of concurrent jobs by running the command with e.g. `-j 4`
 
+### IPv6
+
+Some tests create a single-stack IPv6 service. They can only be run on clusters with IPv6 enabled.
+In order to test IPv6 on a local cluster on macOS, you can use Kind:
+
+1. `brew install kind`
+2. ```shell
+   cat >kind-config.yaml <<EOF
+   kind: Cluster
+   apiVersion: kind.x-k8s.io/v1alpha4
+   networking:
+     ipFamily: ipv6
+     apiServerAddress: 127.0.0.1
+   EOF
+   ```
+3. `kind create cluster --config kind-config.yaml`
+4. When you run `kubectl get svc -o wide --all-namespaces` you should see IPv6 addresses.
+
+
 ### Cleanup
 
 The Kubernetes resources created by the E2E tests are automatically deleted when the test exits. However, you can preserve resources from failed tests for debugging. To do this, set the `MIRRORD_E2E_PRESERVE_FAILED` variable to any value.