Lou DeGenaro created UIMA-5193:
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Summary: DUCC failover support (static)
Key: UIMA-5193
URL: https://issues.apache.org/jira/browse/UIMA-5193
Project: UIMA
Issue Type: Improvement
Components: DUCC
Reporter: Lou DeGenaro
Assignee: Lou DeGenaro
Fix For: 2.2.0-Ducc
DUCC should provide the capability to move the head node, comprising the
broker, database, Orchestrator, PM, RM, SM, and WS, and have the agents
seamlessly switch over w/o service disruption.
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In this "static" failover implementation the agents are pre-configured with a
list of potential head nodes. Introduced into the ducc.properties file is the
key ducc.head.failover whose value is a comma separated list of failover nodes:
ducc.head.failover = node1, node2, node3...
The agents at boot time are configured for broker failover to this set of nodes.
If ducc.head.failover is not specified, then the failover functionality is
simply not supported for the installation (e.g. no seamless transition of
running agents to an alternate broker head node).
If ducc.head.failover is specified, then the node specified for ducc.head must
appear in this list.
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