feat(helm): add priorityClassName attribute (#3301)

Co-authored-by: houseme <housemecn@gmail.com>

helm/README.md

@@ -61,6 +61,7 @@ RustFS helm chart supports **standalone and distributed mode**. For standalone m
 | containerSecurityContext.capabilities.drop[0] | string | `"ALL"` |  |
 | containerSecurityContext.readOnlyRootFilesystem | bool | `true` |  |
 | containerSecurityContext.runAsNonRoot | bool | `true` |  |
+| priorityClassName | string | `""` |  |
 | enableServiceLinks | bool | `false` |  |
 | extraManifests | list | `[]` | List of additional k8s manifests. |
 | fullnameOverride | string | `""` |  |

helm/rustfs/templates/deployment.yaml

@@ -64,6 +64,7 @@ spec:
       tolerations:
         {{- toYaml .Values.tolerations | nindent 8 }}
       {{- end }}
+      priorityClassName: {{ .Values.priorityClassName }}
       securityContext:
         {{- toYaml .Values.podSecurityContext | nindent 8 }}
       initContainers:

helm/rustfs/templates/statefulset.yaml

@@ -65,6 +65,7 @@ spec:
       topologySpreadConstraints:
         {{- toYaml .Values.topologySpreadConstraints.constraints | nindent 8 }}
       {{- end }}
+      priorityClassName: {{ .Values.priorityClassName }}
       securityContext:
         {{- toYaml .Values.podSecurityContext | nindent 8 }}
       initContainers:

helm/rustfs/values.yaml

@@ -169,6 +169,10 @@ containerSecurityContext:
   allowPrivilegeEscalation: false
   runAsNonRoot: true
 
+# Name of an existing PriorityClass to assign, defining the importance of the pods compared to other pods in the cluster.
+# Ref: https://kubernetes.io/docs/concepts/scheduling-eviction/pod-priority-preemption/
+priorityClassName: ""
+
 service:
   annotations: {}
   headlessAnnotations: {} # Applied to the headless Service when mode.distributed.enabled=true