[HDFS-12812] Ozone: dozone: initialize scm and ksm directory on cluster startup

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: HDFS-7240
• Fix Version/s: HDFS-7240
• Component/s: ozone
• Hadoop Flags: Reviewed
• Assignee: Marton Elek
• Reporter: Marton Elek
• Created: 14/Nov/17 16:59
• Updated: 26/Apr/18 21:56
• Resolved: 25/Jan/18 20:03

Description

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.

UPDATE: the patch also contains envrionment variable to initialize the ksm.

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