Use existingClaim for prometheus, alertmanager and grafana
#414 (closed) describes the problem that sometimes local-storage is deployed after other apps already claimed volumes, which can lead to situations like this where early created PVC doesn't have the local-storage class set and won't recover by themselves:
❯ kc get pvc --all-namespaces
NAMESPACE NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
oas alertmanager-alertmanager-monitoring-prometheus-oper-alertmanager-0 Pending 37m
oas monitoring-grafana Pending 38m
oas prometheus-prometheus-monitoring-prometheus-oper-prometheus-0 Pending 37m
oas single-sign-on-userbackend Pending
-
alertmanager -
grafana -
prometheus