Recovery for HA applications with rwx storage
topologyKey: kubernetes.io/hostname or no topology
configuration, have no protection against all the application replicas being in the same
kubernetes.io/hostname in the Pod spec because this anti-affinity rule is host-based
and not zone-based.
If this happens and all replicas are located in the zone that fails, the application that uses
ReadWriteMany (rwx) storage takes 6-8 minutes to recover on the active zone. This pause is for the
Red Hat OpenShift Container Platform nodes in the failed zone to become
(60 seconds) and then for the default pod eviction timeout to expire (300 seconds).