Jordan, Thanks for your quick response! So what I am building is a faul-tolerant framework for linux systems to watch over some number of processes and, when a process goes down and can't be brought back up (disk space, memory, etc...), I want the process watcher to revoke its leadership so that a different machine can start up the process, do any configuration necessary to route clients over to that machine, and assume responsibility as the lead for that process.
Often times what happens is a couple physical machines go down and ALL the managed processes end up on a single machine. I'm giving the users control over groups of processes. A group would be "amqp broker" or "web server". Once a sys admin comes into work and realizes what happened, they are going to want to force the amqp broker back to a specific node and force the web server onto some other node. The way I've designed it, this means those nodes need to be forced to be the leaders for those groups. Thanks again! On Wed, May 21, 2014 at 1:20 PM, Jordan Zimmerman < jor...@jordanzimmerman.com> wrote: > I’d need more details to answer concretely. But, this sounds like a simple > lock. Have the process that wants to be leader acquire an InterProcessMutex. > > -JZ > > > From: Corey Nolet cjno...@gmail.com > Reply: user@curator.apache.org user@curator.apache.org > Date: May 21, 2014 at 12:12:35 PM > To: user user@curator.apache.org > Subject: Force leader > > I have a cluster which is electing a single leader to perform operations > on a node until the node is deemed to be unhealthy. At this time, the > leader revokes itself and another leader is elected to perform the > operations. > > There are times, however, when I need the ability to force a specific > leader. How would I implement something like this? I really don't want to > have to cascade through all the other nodes and tell them to revoke their > leadership because they will each try to run some initialization upon > becoming the leader and that would waste resources. > > Any ideas? > > Thanks! > >
