Elek, Marton created HDDS-446:
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Summary: Provide shaded artifact to start ozone service as a
datanode plugin
Key: HDDS-446
URL: https://issues.apache.org/jira/browse/HDDS-446
Project: Hadoop Distributed Data Store
Issue Type: Improvement
Reporter: Elek, Marton
Assignee: Elek, Marton
Fix For: 0.2.1
Ozone datanode service could be started in two different way:
# as a standalone process
# as a datanode plugin
We tested the second scenarion by compiling both ozone + hadoop trunk together
and created a combined artifact. But we have no more full hadoop distribution
in the ozone release package any more. And we had no answer how it could be
started with an existing hadoop release.
We need a well defined way to add the datanode-service to the classpath of the
hadoop datanode.
I propose here to create a lightweight shaded artifact (and here the shading
only combines all the classes together without package name refactoring) to
make it easier to extend an existing hadoop installation.
In this patch I add the shade plugin execution to the ozone objectstore-service
and the shaded file will be copied to the distribution.
A new docker-compose based execution environment (ozone-hdfs)
demonstrates/tests how it could work.
Tested with hadoop 3.1.0 and datanode service could be started without any
problem
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