AmadeusITGroup
Support watching specific namespaces, instead of only operating cluster-wide.
This would be useful in situations where someone wants to test out this operator without committing to running it as a cluster service for everyone else.
Simplest approach might be to add an optional --watch-namespace=<namespace> flag to the operator. Maybe supporting multiple namespaces.
Ideally too, if --watch-namespace is defined this would allow redis-operator and redis-cluster to be installed without ClusterRoles. In (our) clusters running in a soft multi-tenancy mode ordinary tenants are generally not permitted to install ClusterRoles unless they are actually providing a cluster wide service. I see other operators such as MySQL operator are supporting these two deployment models in their RBAC config : e.g. https://github.com/oracle/mysql-operator/blob/master/mysql-operator/templates/02-rbac.yaml uses an operator.global option to determine whether to render ClusterRoles or Roles. As for listing namespaces etc. perhaps that's not needed when running with --watch-namespace .
@monkeymorgan, @mtomwing I agree with you both, this feature is mandatory in order to run the redis-operator in a multi-tenancy environment. It will not be difficult to implement, I just need to lock some time in order to do it in the coming weeks. Or if one of you feel able and have time to implement this feature, I will be more than happy to help and review your contribution.
It's not a huge amount of work, just e2e should be revamped to take work on different namespaces.
