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Thank you for the suggestion. The requirement does have merit, but looking at it with respect to our total backlog of requests we do not see sufficient interest in this enhancement to merit delivery any time in the foreseeable future. Given the unlikelihood that we would deliver this, we are declining the request rather than leaving it in an uncommitted state for an extended period of time. If you would like to discuss this decision further, please contact Graham Charters <charters@uk.ibm.com>.
a few questions to get an idea of the scope/effort required and possible alternate ways to satisfy it.
Does the solution use DNS for service discovery? Would it be sufficient for each server.xml to specify an explicit host:port rather than the servers own? I think this would survive merge-like scenarios better and not require runtime changes.
Secondly, do you need environment variable interpolation for fields other than the host and port? And would you expect pluginUtility-like XML generation to populate these w/ the variables or is post-processing on the generation side acceptable?
Thanks
Hi, If you are using Dynamic Routing with a controller and replica sets then an update to the plugin is not needed as App Servers will communicate with the controller/replica sets, and when the plugin communicates with the controller/replica sets it will update the routing rules automatically. This would be using stackGroups and the ND version is needed for the controller and replica sets, but not for the regular App Servers. Please see : https://www.ibm.com/support/knowledgecenter/en/SSAW57_liberty/com.ibm.websphere.wlp.nd.multiplatform.doc/ae/twlp_autoscale_deployxml.html
The Plugin file will also be created when the server starts. It may be possible to transfer the plugin file after it is created to the Plugin itself.
You can use the scripts needed for the scaling above and wrapper that with what you and and pass the variables you want to the script which will then launch the App Server.
You could also update the bootstrap.properties file with variables that will be placed in the server.xml. This would require a wrapper script that would update that file before the App Server is launched.
Regards, Brian