Fengdong Yu created HDFS-4631:
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Summary: Support customized call back method during failover
automatically.
Key: HDFS-4631
URL: https://issues.apache.org/jira/browse/HDFS-4631
Project: Hadoop HDFS
Issue Type: Improvement
Components: ha
Affects Versions: 3.0.0
Reporter: Fengdong Yu
Fix For: 3.0.0
ZKFC add HealthCallbacks bu default, this can do quiteElection at least. but we
often want to be alerted if there is fail over occurring(such as send email,
short message), especially for prod cluster.
There is a configured fence script. maybe we can put all these logics in the
script. but in reasonable, fence script does only one thing: fence :)
So I added this patch, we can configure customized HM callback method, if there
is no configration, then only HealthCallbacks is added.
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