[GitHub] jasonpet commented on issue #133: [Question] How to switch active hosts?

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jasonpet commented on issue #133: [Question] How to switch active hosts?
URL: https://github.com/apache/incubator-openwhisk-package-alarms/issues/133#issuecomment-375311783
 
 
   This is done using redis publish/subscribe.  For example if active host is host0 and you run:  `publish dockermachine_alarmservice_worker0 host1` will change the active host from host0 to host1.  We simply use a monitor to ping the health endpoint and if the endpoint is not reachable the monitor will switch the active host.  

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