We have a planned network outage for 8 hours that will stop communication between all hosts, including between nodes in our elastic cluster.
We have 3 master nodes and 2 minimum master nodes set. Using logstash to write to the cluster and apps read from it. Indexes are replicated with 1p, 2r.
I don't want to have to organise for the cluster to be shut down and restarted.
If I do nothing, will the cluster have any problems? I didn't think it would, apart from maybe lots of errors being logged.
But should I be cautious, and stop the logstash jobs, and maybe set shard allocation to a long period to cover the outage? Or something else? Not really sure what is best.