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Upgrading Sentinel

Sentinel is a DaemonSet — upgrades roll out node by node.

Standard upgrade​

helm upgrade saviour \
  oci://ghcr.io/saviourops-labs/charts/saviour \
  --version NEW_SUITE_VERSION \
  --reuse-values

The default updateStrategy is RollingUpdate with maxUnavailable: 1, so one node's Sentinel pod is replaced at a time.

Monitor rollout​

kubectl rollout status ds/saviour-sentinel -n saviour
# Waiting for daemon set "saviour-sentinel" rollout to finish: 2 out of 5 new pods have been updated...

Verify after upgrade​

kubectl get ds saviour-sentinel -n saviour
kubectl logs -n saviour -l app.kubernetes.io/name=sentinel --tail=10