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

["Kent Yao (Jira)" <ji...@apache.org>]

Kent Yao created SPARK-35969:
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             Summary: 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


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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