[jira] [Created] (AMBARI-17888) Create configuration flag to prevent changing of directory permissions

["Siddharth Wagle (JIRA)" <ji...@apache.org>]

Siddharth Wagle created AMBARI-17888:
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             Summary: Create configuration flag to prevent changing of directory permissions
                 Key: AMBARI-17888
                 URL: https://issues.apache.org/jira/browse/AMBARI-17888
             Project: Ambari
          Issue Type: Task
          Components: ambari-agent
    Affects Versions: 2.2.2
            Reporter: Siddharth Wagle
             Fix For: 2.4.0


A common method of addressing failed disks, which is to set unwritable permissions on a directory such as /hadoop10 within the root filesystem.

Once mounted, the mounted filesystem will overlay the correct permissions structure, allowing hdfs to write to the mounted disk.

In the case of a failed mount operation, the associated /hadoop10 directory will be unwritable by hdfs.

However, Ambari will see the visible directory with incorrect permissions, and "fix" the permissions back to a writable directory-- resulting in the datanode filling the root partition of a machine.

We need to prevent ambari from changing permissions on YARN local and HDFS data dirs.



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