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https://issues.apache.org/jira/browse/AMBARI-13194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14905560#comment-14905560
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Hudson commented on AMBARI-13194:
---------------------------------
SUCCESS: Integrated in Ambari-trunk-Commit #3498 (See
[https://builds.apache.org/job/Ambari-trunk-Commit/3498/])
AMBARI-13194. Alert definition when DataNode data dirs become unmounted
(alejandro) (afernandez:
http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=51620c6e2c7c846df26294d52c83fab9f141d202)
* ambari-common/src/main/python/resource_management/core/providers/system.py
*
ambari-common/src/main/python/resource_management/libraries/functions/dfs_datanode_helper.py
*
ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/package/alerts/alert_datanode_unmounted_data_dir.py
* ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/alerts.json
* ambari-agent/src/test/python/resource_management/TestDatanodeHelper.py
*
ambari-server/src/test/python/stacks/2.0.6/HDFS/test_alert_datanode_unmounted_data_dir.py
> Alert definition when DataNode data dirs become unmounted
> ---------------------------------------------------------
>
> Key: AMBARI-13194
> URL: https://issues.apache.org/jira/browse/AMBARI-13194
> Project: Ambari
> Issue Type: Bug
> Components: ambari-agent, ambari-server
> Affects Versions: 2.1.2
> Reporter: Alejandro Fernandez
> Assignee: Alejandro Fernandez
> Fix For: 2.2.0, 2.1.2
>
> Attachments: AMBARI-13194.patch
>
>
> Ambari uses the dfs.datanode.data.dir.mount.file property in HDFS, whose
> value is typically /etc/hadoop/conf/dfs_data_dir_mount.hist
> to track the mount points for each of the data dirs.
> E.g.,
> {code}
> /hadoop01/data,/device1
> /hadoop02/data,/device2
> /hadoop03/data,/ # this one is on root, the others are all on mount
> points.
> {code}
> Whenever a drive becomes unmounted, Ambari detects that it was previously on
> a mount and will not create that data dir; HDFS can still tolerate the
> failure if dfs.datanode.failed.volumes.tolerated is greater than 0.
> Now, if the /etc/hadoop/conf/dfs_data_dir_mount.hist file is deleted, then
> Ambari won't have this knowledge, and will create the datadir (even if it's
> on the root partition).
> To improve tracking, create an alert definition that checks the following
> * warning status if the /etc/hadoop/conf/dfs_data_dir_mount.hist file is
> deleted
> * critical status if at least one of the data dirs is mounted on the root
> partition, and at least one data dir is on a mount
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