bgeng777 commented on code in PR #242:
URL:
https://github.com/apache/flink-kubernetes-operator/pull/242#discussion_r881193136
##########
docs/content/docs/operations/helm.md:
##########
@@ -107,6 +107,29 @@ The webhook can be disabled during helm install by passing
the `--set webhook.cr
The operator supports watching a specific list of namespaces for
FlinkDeployment resources. You can enable it by setting the `--set
watchNamespaces={flink-test}` parameter.
When this is enabled role-based access control is only created specifically
for these namespaces for the operator and the jobmanagers, otherwise it
defaults to cluster scope.
+Note, when working with webhook in a specified namespace, users should pay
attention to the definition of `namespaceSelector.matchExpressions` in
`webhook.yaml`. Currently, the default implementation of webhook relies on the
`kubernetes.io/metadata.name` label to filter the validation requests
+so that only validation requests from the specified namespace will be
processed. The `kubernetes.io/metadata.name` label is automatically attached
since k8s
[1.21.1](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.21.md#v1211).
+
+As a result, for users who run the flink kubernetes operator with older k8s
version, they may label the specified namespace by themselves before installing
the operator with helm:
+
+```
+kubectl label namespace <target namespace> kubernetes.io/metadata.name=<target
namespace>
+```
+
+Besides, users can define their own namespaceSelector to filter the requests
due to customized requirements.
+A simple example that only accept requests from namespaces with both
`kubernetes.io/metadata.name` amd `username` labels could be:
Review Comment:
Thanks! Fixed in 2c03133
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