[jira] [Assigned] (FLINK-27615) Document how to define namespaceSelector for k8s operator's webhook for different k8s versions

["Yang Wang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-27615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yang Wang reassigned FLINK-27615:
---------------------------------

    Assignee: Biao Geng

> Document how to define namespaceSelector for k8s operator's webhook for different k8s versions
> ----------------------------------------------------------------------------------------------
>
>                 Key: FLINK-27615
>                 URL: https://issues.apache.org/jira/browse/FLINK-27615
>             Project: Flink
>          Issue Type: Improvement
>          Components: Kubernetes Operator
>            Reporter: Biao Geng
>            Assignee: Biao Geng
>            Priority: Major
>
> In our webhook, to support {{{}watchNamespaces{}}}, we rely on the {{kubernetes.io/metadata.name}} to filter the validation requests. However, this label will be automatically added to a namespace only since k8s 1.21.1 due to k8s' [release notes|https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.21.md#v1211] .  If users run the flink k8s operator on older k8s versions, they have to add such label by themselevs to support the feature of namespaceSelector in our webhook.
> As a result, if we want to support the feature defaultly, we may need to emphasize that users should use k8s >= v1.21.1 to run the flink k8s operator.
>  
> Due to aitozi's advice, it may be better to add document of how to support the nameSelector based validation instead of limiting the k8s version to be >= 1.21.1 to support more users.



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