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Enabling CDAP HA
In addition to having a cluster architecture that a cluster architecture that supports HA (high availability), these additional configuration steps need to be followed and completed:
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Sync the configuration files (such as
cdap-site.xmlandcdap-security.xml) on all the nodes.While the default bind.address settings (
0.0.0.0, used forapp.bind.address,data.tx.bind.address,router.bind.address, and so on) can be synced across hosts, if you customize them to a particular IP address, they will—as a result—be different on different hosts.Starting services is described in Starting CDAP Services.
CDAP Master
The CDAP Master service primarily performs coordination tasks and can be scaled for redundancy. The instances coordinate amongst themselves, electing one as a leader at all times.
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