[jira] [Assigned] (SPARK-35969) Make the pod prefix more readable and tallied with K8S DNS Label Names

["Apache Spark (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-35969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-35969:
------------------------------------

    Assignee: Apache Spark

> Make the pod prefix more readable and tallied with K8S DNS Label Names
> ----------------------------------------------------------------------
>
>                 Key: SPARK-35969
>                 URL: https://issues.apache.org/jira/browse/SPARK-35969
>             Project: Spark
>          Issue Type: Improvement
>          Components: Kubernetes
>    Affects Versions: 3.2.0
>            Reporter: Kent Yao
>            Assignee: Apache Spark
>            Priority: Major
>
> By default, the executor pod prefix is generated by the app name. It handles characters that match [^a-z0-9\\-] differently. The '.' and all whitespaces will be converted to '-', but other ones to empty string. Especially,  characters like '_', '|' are commonly used as a word separator in many languages.
> According to the K8S DNS Label Names, see [https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-label-names,] we can convert all special characters to `-`.
>  
> {code:scala}
> scala> "time.is%the￥most$valuable_——————thing,it's about time.".replaceAll("[^a-z0-9\\-]", "-").replaceAll("-+", "-")
> res9: String = time-is-the-most-valuable-thing-it-s-about-time-
> scala> "time.is%the￥most$valuable_——————thing,it's about time.".replaceAll("\\s+", "-").replaceAll("\\.", "-").replaceAll("[^a-z0-9\\-]", "").replaceAll("-+", "-")
> res10: String = time-isthemostvaluablethingits-about-time-
> {code}



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