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

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/values.yaml

@@ -398,6 +398,11 @@ 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: "RollingUpdate"
+
   # -- 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