expose hostnetwork option

traefik/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: traefik
-version: 5.4.0
+version: 5.5.0
 appVersion: 2.1.3
 description: A Traefik based Kubernetes ingress controller
 keywords:

traefik/templates/deployment.yaml

@@ -46,6 +46,7 @@ spec:
     spec:
       serviceAccountName: {{ template "traefik.fullname" . }}
       terminationGracePeriodSeconds: 60
+      hostNetwork: {{ .Values.hostNetwork }}
       containers:
       - image: {{ .Values.image.name }}:{{ .Values.image.tag }}
         name: {{ template "traefik.fullname" . }}

traefik/values.yaml

@@ -123,6 +123,12 @@ persistence:
   path: /data
   annotations: {}
 
+# If hostNetwork is true, runs traefik in the host network namespace
+# To prevent unschedulabel pods due to port collisions, if hostNetwork=true
+# and replicas>1, a pod anti-affinity is recommended and will be set if the
+# affinity is left as default.
+hostNetwork: false
+
 resources: {}
   # requests:
   #   cpu: "100m"
@@ -131,5 +137,17 @@ resources: {}
   #   cpu: "300m"
   #   memory: "150Mi"
 affinity: {}
+# # This example pod anti-affinity forces the scheduler to put traefik pods
+# # on nodes where no other traefik pods are scheduled.
+# # It should be used when hostNetwork: true to prevent port conflicts
+#   podAntiAffinity:
+#     requiredDuringSchedulingIgnoredDuringExecution:
+#     - labelSelector:
+#         matchExpressions:
+#         - key: app
+#           operator: In
+#           values:
+#           - {{ template "traefik.name" . }}
+#       topologyKey: failure-domain.beta.kubernetes.io/zone
 nodeSelector: {}
 tolerations: []