feat(chart): make DaemonSet update strategy configurable in values.yaml (#6136)

Signed-off-by: oujonny <jonny@immerda.ch>
(cherry picked from commit 66525ea)

Author: oujonny

charts/kube-ovn-v2/templates/_helpers.tpl

@@ -117,7 +117,7 @@ Get IPs of master nodes from values
       {{- end -}}
     {{- end -}}
   {{- else -}}
-    RollingUpdate
+    {{- $.Values.ovsOvn.updateStrategy -}}
   {{- end -}}
 {{- end -}}
 

charts/kube-ovn-v2/templates/ovs-ovn/ovs-ovn-daemonset.yaml

@@ -18,9 +18,11 @@ spec:
       app.kubernetes.io/part-of: kube-ovn
   updateStrategy:
     type: {{ include "kubeovn.ovs-ovn.updateStrategy" . }}
+    {{- if eq (include "kubeovn.ovs-ovn.updateStrategy" .) "RollingUpdate" }}
     rollingUpdate:
-      maxSurge: 1
-      maxUnavailable: 0
+      maxSurge: {{ .Values.ovsOvn.strategy.rollingUpdate.maxSurge }}
+      maxUnavailable: {{ .Values.ovsOvn.strategy.rollingUpdate.maxUnavailable }}
+    {{- end }}
   template:
     metadata:
       {{- with .Values.ovsOvn.podAnnotations }}

charts/kube-ovn-v2/templates/ovs-ovn/ovs-ovn-dpdk-daemonset.yaml

@@ -18,10 +18,12 @@ spec:
       app.kubernetes.io/name: kube-ovn-ovs-dpdk
       app.kubernetes.io/part-of: kube-ovn
   updateStrategy:
-    type: RollingUpdate
+    type: {{ .Values.ovsOvn.updateStrategy.type }}
+    {{- if eq .Values.ovsOvn.updateStrategy.type "RollingUpdate" }}
     rollingUpdate:
-      maxSurge: 1
-      maxUnavailable: 0
+      maxSurge: {{ .Values.ovsOvn.strategy.rollingUpdate.maxSurge }}
+      maxUnavailable: {{ .Values.ovsOvn.strategy.rollingUpdate.maxUnavailable }}
+    {{- end }}
   template:
     metadata:
       {{- with .Values.ovsOvn.podAnnotations }}

charts/kube-ovn-v2/values.yaml

@@ -365,6 +365,14 @@ ovsOvn:
       cpu: "2"
       memory: "1000Mi"
 
+  # -- ovs-ovn DaemonSet update strategy.
+  # ref: https://kubernetes.io/docs/tasks/manage-daemon/update-daemon-set/#daemonset-update-strategy
+  # @section -- OVS/OVN daemons configuration
+  updateStrategy:
+    type: "RollingUpdate"
+    maxSurge: 1
+    maxUnavailable: 0
+
   # -- Disable auto-loading of kernel modules by OVS.
   # If this is disabled, you will have to enable the Open vSwitch kernel module yourself.
   # @section -- OVS/OVN daemons configuration