AMBARI-14387. Exclude "/tmp" and mountpoints from suggested service data directories

[randerzander]

Added excluded /tmp and /etc mountpounts to ambari-agent

[afernandez]

Hi,

Thank you for your contribution. Our dev process is to use patches and code reviews instead of pull requests.
https://cwiki.apache.org/confluence/display/AMBARI/How+to+Contribute

Cheers,
Alejandro

[Jetly-Jaimin]

Copying description as present on Apache Jira:

Ambari agents running in Docker containers frequently have /tmp and /etc mountpoints. Between HDFS, ZooKeeper, HBase, and YARN configs, it's very easy to mistakenly accept a /tmp/hadoop suggested data directory. Any mountpoints with /tmp or /etc should be omitted.

[Jetly-Jaimin]

@randerzander This patch completely masks the information of /etc and /tmp being mountpoints on hosts.

IMO even if /etc and /tmp are mountpoints on the hosts then the host API should keep showing that correct information but we can change the logic that recommends data directory for hadoop services to exclude /etc and /tmp mountpoints
Additionally if some user changes the recommended value to include /etc and /tmp mountpoints for data directories, we can validate and warn end user about it.

cc @u39kun

[asfgit]

Refer to this link for build results (access rights to CI server needed):
https://builds.apache.org/job/Ambari-Github-PullRequest-Builder/86/
Test FAILed.
Test FAILured.

[jonathan-hurley]

Closing as it seems this PR is stale and not being updated.