Switch leader election to lease

[gardener-attic]

Switch leader election to lease

[timebertt]

Good news, kubernetes-sigs/controller-runtime#1147 was merged in the meantime and [email protected] just got released (including the configurable leader election lock), so we will probably be able to vendor the new release soon :)

[rfranzke]

ℹ️ Depends on revendoring sigs.k8s.io/[email protected] in gardener/gardener.

[rfranzke]

I guess this can be done now after #105, right @timebertt? I think the default is now configmapsleases already, so is this issue only about setting the default to leases then?

[timebertt]

I think the default is now configmapsleases already, so is this issue only about setting the default to leases then?

Yes, exactly.
We probably have to do some migration logic in g/g in order to fully migrate to leases.
I guess, we can't simply change the default here, as users might skip releases of g/g or clusters might be hibernated for a long time, so that they skip a grm deployment using the configmapsleases lock.