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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