flocker-control service in HA mode

ClusterHQ / flocker

Container data volume manager for your Dockerized application

https://clusterhq.com

Apache License 2.0

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flocker-control service in HA mode #2911

Open bipeens opened 8 years ago

bipeens commented 8 years ago

I have started using flocker in my cluster along with mesos and marathon. 1) Can I have multiple nodes running as flocker-control service? 2) If Yes : Is there any leader mechanism in flocker-control nodes? If any node goes down will that affect the cluster? If No: Considering if the flocker-control service node goes down. Is there any mechanism by which I can control such behavior similar to zookeeper in HA.

Also, I tried maintaining the /var/lib/flocker/current_configuration.json for control-service node. But when I try to use for my new created control-service node after the failure of first, I get certification issue.

wallnerryan commented 8 years ago

Hi @bipeens,

We are working toward adding HA, but currently it is not supported for the control service.

The way you can do this today is by maintaining /var/lib/flocker/current_configuration.json but also keeping the CA certificates / control certificates safe. When you bring up your new control-service it needs to have the same IP/DNS name as the old one, then things should pick back up.

bipeens commented 8 years ago

Thanks! Currently, we are looking forward to this feature. In our side, as nodes can't have same IP/DNS name it becomes difficult to maintain the state.