helm: add enableServiceLinks, poddisruptionbudget (#1293)

Signed-off-by: Juri Malinovski <juri.malinovski@coolbet.com>

helm/README.md

@@ -31,6 +31,7 @@ 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` |  |
+| enableServiceLinks | bool | `false` |  |
 | extraManifests | list | `[]` | List of additional k8s manifests. |
 | fullnameOverride | string | `""` |  |
 | image.pullPolicy | string | `"IfNotPresent"` |  |
@@ -73,6 +74,9 @@ RustFS helm chart supports **standalone and distributed mode**. For standalone m
 | mode.standalone.enabled | bool | `false` | RustFS standalone mode support, namely one pod one pvc.  |
 | nameOverride | string | `""` |  |
 | nodeSelector | object | `{}` |  |
+| pdb.create | bool | `false` | Enable/disable a Pod Disruption Budget creation |
+| pdb.maxUnavailable | string | `1` |  |
+| pdb.minAvailable | string | `""` |  |
 | podAnnotations | object | `{}` |  |
 | podLabels | object | `{}` |  |
 | podSecurityContext.fsGroup | int | `10001` |  |

helm/rustfs/templates/poddisruptionbudget.yaml

@@ -0,0 +1,22 @@
+{{- if and .Values.pdb.create .Values.mode.distributed.enabled }}
+---
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: {{ include "rustfs.fullname" . }}
+  labels:
+    {{- include "rustfs.labels" . | nindent 4 }}
+    {{- with .Values.commonLabels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+spec:
+  {{- if .Values.pdb.minAvailable }}
+  minAvailable: {{ .Values.pdb.minAvailable }}
+  {{- end }}
+  {{- if or .Values.pdb.maxUnavailable (not .Values.pdb.minAvailable) }}
+  maxUnavailable: {{ .Values.pdb.maxUnavailable }}
+  {{- end }}
+  selector:
+    matchLabels:
+      {{- include "rustfs.selectorLabels" . | nindent 6 }}
+{{- end }}

helm/rustfs/templates/statefulset.yaml

@@ -26,6 +26,7 @@ spec:
         {{- toYaml . | nindent 8 }}
         {{- end }}
     spec:
+      enableServiceLinks: {{ .Values.enableServiceLinks }}
       {{- with include "chart.imagePullSecrets" . }}
       imagePullSecrets:
         {{- . | nindent 8 }}

helm/rustfs/values.yaml

@@ -187,4 +187,14 @@ initStep:
     runAsUser: 0
     runAsGroup: 0
 
+pdb:
+  create: false
+  # Minimum number/percentage of pods that should remain scheduled
+  minAvailable: ""
+  # Maximum number/percentage of pods that may be made unavailable
+  maxUnavailable: 1
+
+# Whether information about services should be injected into pod's environment variable
+enableServiceLinks: false
+
 extraManifests: []