Hi,
I have a cluster with a few nodes running clustered sharding persistent
actors that I am close to deploy in prod
I tested that once a node is unreachable all the persistent actors inside
it are unreachable as well until human intervention takes places to Down
that unreachable node for the cluster to restore those actors in other
nodes.
I am not considering the commercial split brain strategies so I have no
other option than doing it manual.
The worst case would be for the human intervention to take long and so for
clients to be unable to interact with the actors in a considerable time
window.
I was thinking about having an actor in each node just like the
SimpleClusterListener written in the akka cluster docs and somehow to mark
as Down the unreachable node when handling the command: UnreachableMember using
the akka management API through HTTP (no matter if it was network partition
or crash)
I don´t know if this is possible because I didn't read as a solution so
far. The worst case would be that if it was actually a network partition
that will be eventually restore the unreachable node will be Down and
removed from the cluster and all its persistent actors (maybe thousands,
millions) would be restored again in other nodes, am I right?
def receive = { case UnreachableMember(member) =>
akkaManagement.markAsDown(member.address) // something like this }
Is this OK as a solution to avoid human intervention?
Thanks,
Sebastian
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