Elek, Marton created HDFS-12812:
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Summary: Ozone: dozone: initialize scm directory on cluster startup
Key: HDFS-12812
URL: https://issues.apache.org/jira/browse/HDFS-12812
Project: Hadoop HDFS
Issue Type: Sub-task
Components: ozone
Affects Versions: HDFS-7240
Reporter: Elek, Marton
HDFS-12739 fixed the scm, but after the patch it couldn't be started without a
separated `hdfs scm -init` any more. Unfortunatelly it breaks the
docker-compose functionality.
This is handled int the starter script of the base runner docker image for
namenode. I also fixed this in the runner docker image
(https://github.com/elek/hadoop/commit/b347eb4bfca37d84dbcdd8c4bf353219d876a9b7)
will upload the improved patch to the HADOOP-14898.
In this patch I just add a new environment variable to init the scm if the
version file doesn't exist.
To test:
Do a full build and go to the dev-support/compose/ozone:
```
docker-compose pull
docker-compose up -d
```
Note: the pull is important as the new docker image -- which could handle the
new environment variable -- should be used
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