traefik: added pod disruption budget (#4367)

stable/traefik/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: traefik
-version: 1.28.1
+version: 1.29.0
 appVersion: 1.5.4
 description: A Traefik based Kubernetes ingress controller with Let's Encrypt support
 keywords:

stable/traefik/README.md

@@ -94,6 +94,7 @@ The following table lists the configurable parameters of the Traefik chart and t
 | `whiteListSourceRange`          | Enable IP whitelisting at the entrypoint level.                      | `false`                                   |
 | `externalTrafficPolicy`         | Set the externalTrafficPolicy in the Service to either Cluster or Local | `Cluster`                              |
 | `replicas`                      | The number of replicas to run; __NOTE:__ Full Traefik clustering with leader election is not yet supported, which can affect any configured Let's Encrypt setup; see Clustering section | `1` |
+| `podDisruptionBudget`                  | Pod disruption budget             | `{}` |
 | `cpuRequest`                    | Initial share of CPU requested per Traefik pod                       | `100m`                                    |
 | `memoryRequest`                 | Initial share of memory requested per Traefik pod                    | `20Mi`                                    |
 | `cpuLimit`                      | CPU limit per Traefik pod                                            | `200m`                                    |

stable/traefik/templates/poddisruptionbudget.yaml

@@ -0,0 +1,17 @@
+{{- if .Values.podDisruptionBudget -}}
+apiVersion: policy/v1beta1
+kind: PodDisruptionBudget
+metadata:
+  name: {{ template "traefik.fullname" . }}
+  labels:
+    app: {{ template "traefik.name" . }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+spec:
+  selector:
+    matchLabels:
+      app: {{ template "traefik.name" . }}
+      release: {{ .Release.Name }}
+{{ toYaml .Values.podDisruptionBudget | indent 2 }}
+{{- end -}}

stable/traefik/values.yaml

@@ -8,6 +8,11 @@ loadBalancerIP:
 whiteListSourceRange: []
 externalTrafficPolicy: Cluster
 replicas: 1
+
+podDisruptionBudget: {}
+  # maxUnavailable: 1
+  # minAvailable: 2
+
 cpuRequest: 100m
 memoryRequest: 20Mi
 cpuLimit: 100m