-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/51562/
-----------------------------------------------------------
(Updated Sept. 1, 2016, 6:11 p.m.)
Review request for Ambari, Dmytro Sen, Sumit Mohanty, and Sid Wagle.
Bugs: AMBARI-18289
https://issues.apache.org/jira/browse/AMBARI-18289
Repository: ambari
Description
-------
PROBLEM
Negative values are being reported for IOPS in the "system servers" dashboard
BUG
This was a dockerized environment. Negative rate values were seen because
read/write counters were dropping below the previous values at random times. On
further investigation, it revealed that this was due to the docker volume
groups present on the host. It is expected of docker containers to add/remove
the volume groups during the lifecyle of a container. So, when a volume group
goes away, the read/write counters do not contribute to the total counter
values, thus making the value go below the last seen value.
FIX
Have a provision to discard such "special" disk partitions through a skip
pattern. If skipped, they will not contribute to the global counter metric.
Individual disk counter metrics can be used to get disk specific counter values.
Diffs (updated)
-----
ambari-metrics/ambari-metrics-host-monitoring/conf/unix/metric_monitor.ini
3e5d861
ambari-metrics/ambari-metrics-host-monitoring/src/main/python/core/config_reader.py
02f0ce3
ambari-metrics/ambari-metrics-host-monitoring/src/main/python/core/host_info.py
845b270
ambari-server/src/main/resources/common-services/AMBARI_METRICS/0.1.0/configuration/ams-env.xml
4135d32
ambari-server/src/main/resources/common-services/AMBARI_METRICS/0.1.0/package/scripts/params.py
2503c43
ambari-server/src/main/resources/common-services/AMBARI_METRICS/0.1.0/package/templates/metric_monitor.ini.j2
383a0de
Diff: https://reviews.apache.org/r/51562/diff/
Testing
-------
Manually tested.
Thanks,
Aravindan Vijayan
