Leader election, how to notice it?

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hello

I have an application that talks to ceph's control plane, I can only run a single copy of it. 
Instead of setting up pacemaker or similar I'd like to only run the application in the same machine
as the leader Mon. At start of the application I can detect who's the leader,
but if the leader changes I have no way to detect it without parsing logs.

Is there any way, without polling, event based, to detect leader change?

Thanks

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