Diego Lobba created FLINK-37467:
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Summary: FlinkSessionJob: possibility to use configmaps and
secrets in args parameter
Key: FLINK-37467
URL: https://issues.apache.org/jira/browse/FLINK-37467
Project: Flink
Issue Type: Improvement
Components: Kubernetes Operator
Affects Versions: 1.10.0
Reporter: Diego Lobba
It would be nice to have the args parameter used by the Flink job as a string
interpolated using existing Kubernetes configmap and secrets resources.
Pros:
* using kubernetes native resources to manage secrets and configuration values
* avoid duplicating configurations used by multiple jobs
* tracking of dependant configmaps and secrets used by the FlinkSessionJob
Considerations:
* The pod running the job has access to all environment variables defined in
the target session cluster, however
* the args parameter does not enable interpolating environment variables, for
instance if string "${MY_ENV_VARIABLE}" is defined as string value to the args
parameter, there is no interpolation and the job is going to see the literal
string value passed; moreover
* increasing the number of environment variables to the session cluster does
not scale well with the number of jobs, is not enforcing job independence as a
principle and would required downtime to all job managed by the session cluster
in case any of them require an update to the environment variable.
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