GitHub user knusbaum opened a pull request:
https://github.com/apache/storm/pull/838
[STORM-855] Heartbeat Server (Pacemaker)
This pull request redirects worker heartbeats away from Zookeeper and into
a new server, 'Pacemaker'.
The redirection is accomplished by making `ClusterState` pluggable through
the `ClusterStateFactory` interface.
By default, Pacemaker is not enabled. It can be enabled by setting
`storm.cluster.state.store` from its default value of
`"backtype.storm.cluster_state.zookeeper_state_factory"` to
`"org.apache.storm.pacemaker.pacemaker_state_factory"`
Pacemaker includes both digest-based and kerberos-based security, but it is
primitive.
Right now Pacemaker is not HA, but currently if Pacemaker fails, Nimbus
will NOT start killing and reassigning workers, so Pacemaker going down won't
bring down a cluster. It does need to be brought back up before new jobs can be
submitted, though.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/knusbaum/incubator-storm STORM-855
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/storm/pull/838.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #838
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commit 444ec05e5a9f38f9a9472c54b39f1371c839683b
Author: Kyle Nusbaum <[email protected]>
Date: 2015-10-30T22:21:27Z
PACEMAKER OPEN SOURCE!
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