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Posted to issues@spark.apache.org by "Michael Gendelman (JIRA)" <ji...@apache.org> on 2019/08/04 07:34:00 UTC
[jira] [Commented] (SPARK-24091) Internally used ConfigMap prevents
use of user-specified ConfigMaps carrying Spark configs files
[ https://issues.apache.org/jira/browse/SPARK-24091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16899578#comment-16899578 ]
Michael Gendelman commented on SPARK-24091:
-------------------------------------------
[~tmckay] We are experiencing the same issue and your solution looks great but I'm not sure how to implement it. You write:
{quote}One way to handle this is allow a user-specified ConfigMap to be mounted at another location
{quote}
How can we mount a user-specified ConfigMap when we can't control the Pod specification?
> Internally used ConfigMap prevents use of user-specified ConfigMaps carrying Spark configs files
> ------------------------------------------------------------------------------------------------
>
> Key: SPARK-24091
> URL: https://issues.apache.org/jira/browse/SPARK-24091
> Project: Spark
> Issue Type: Brainstorming
> Components: Kubernetes
> Affects Versions: 2.4.0
> Reporter: Yinan Li
> Priority: Major
>
> The recent PR [https://github.com/apache/spark/pull/20669] for removing the init-container introduced a internally used ConfigMap carrying Spark configuration properties in a file for the driver. This ConfigMap gets mounted under {{$SPARK_HOME/conf}} and the environment variable {{SPARK_CONF_DIR}} is set to point to the mount path. This pretty much prevents users from mounting their own ConfigMaps that carry custom Spark configuration files, e.g., {{log4j.properties}} and {{spark-env.sh}} and leaves users with only the option of building custom images. IMO, it is very useful to support mounting user-specified ConfigMaps for custom Spark configuration files. This worths further discussions.
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