Set ctl socket ownership

This is moved from neutron-ovs-agent init script[0] to
openvswitch poststart to ensure that ovs ctl socket
has the required permissions even if the openvswitch
pods are restarted.

[0] https://github.com/openstack/openstack-helm/blob/master/neutron/templates/bin/_neutron-openvswitch-agent-init.sh.tpl#L22-L25

Change-Id: I09e604576e2408a8dec9905d1ad070422351ed99

openvswitch/templates/bin/_openvswitch-vswitchd.sh.tpl

@@ -107,4 +107,12 @@ function stop () {
   ovs-appctl -T1 -t /run/openvswitch/ovs-vswitchd.${PID}.ctl exit
 }
 
+function poststart () {
+  # This enables the usage of 'ovs-appctl' from neutron-ovs-agent pod.
+
+  PID=$(cat $OVS_PID)
+  OVS_CTL=/run/openvswitch/ovs-vswitchd.${PID}.ctl
+  chown {{ .Values.pod.user.nova.uid }}.{{ .Values.pod.user.nova.uid }} ${OVS_CTL}
+}
+
 $COMMAND

openvswitch/templates/daemonset-ovs-vswitchd.yaml

@@ -112,6 +112,11 @@ It should be handled through lcore and pmd core masks. */}}
             - /tmp/openvswitch-vswitchd.sh
             - start
           lifecycle:
+            postStart:
+              exec:
+                command:
+                  - /tmp/openvswitch-vswitchd.sh
+                  - poststart
             preStop:
               exec:
                 command: