Stop renewing the lease when no longer valid

[essobedo]

Hi,

I have noticed that when the lease is no longer valid, it simply stops trying to renew it, which implicitly implies that we no longer have a leader.

If the lease is no longer valid, what do you think about allowing to renew the lease in case it is still the leader? Or at least, trigger a new leader election?

Indeed, it is more or less what is implemented in the client-go project of K8s as you can see in the code . If the lease is no longer valid, but it is still the leader, then the lease is renewed.

WDYT?

[essobedo]

Since controller-runtime is based on client-go and the Java operator SDK is based on this library, we end up with different behavior between an Operator written in Go and an Operator written in Java.