Keith Wall created QPID-7263:
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Summary: Make HA feature integrate more nicely with clients
referencing the Broker via a VIP
Key: QPID-7263
URL: https://issues.apache.org/jira/browse/QPID-7263
Project: Qpid
Issue Type: Improvement
Components: Java Broker
Reporter: Keith Wall
One possible deployment pattern for HA is that clients reference the HA group
via a VIP rather than utilising a failover url. This isolates the client from
knowledge of the individual node addresses. This deployment pattern is
currently possible but it needs a relatively deep integration: custom scripting
is required to track the location of the master node (using the Java Broker's
REST API) with changes causing the VIP's target to be updated.
VIPs usually have a feature which is able to detect when a target is down (port
closed) and direct traffic to another target instead. In our case, this
feature cannot be used become the Broker continues to listen on the Port even
if the Virtualhost is not the master. (This is because in the model a services
many virtual hosts).
It would be desirable if a cleanly integration could be found:
* somehow arranging for Ports associated with HA to become unbound when the
mastership goes away.
* perhaps by providing an additional 'ping' port related to the virtualhost
that is only bound when the master is present at the node.
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