Add option to keep Ray clusters after a job has finished #794
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Summary
Fixes #783
Add option to keep Ray clusters after a job has finished
Details and comments
Creates a new environmental variable,
RAY_CLUSTER_NO_DELETE_ON_COMPLETE
, for the scheduler which allows operators to preserve Ray clusters after a job has completed.Also adds a
nodelete=true
label to the Ray cluster, which will allow a simplekubectl delete raycluster -l nodelete=true
to remove all clusters that won't be automatically cleaned up