Add optional value for extra poststart command

Add option to define an extra command (or commands via multiline yaml
value) that will run at the end of the poststart script. Specific
deployments can benefit from extra cleanup/checks.

Change-Id: I7c26292dc65dc0bfd4374b1f5577696fca89140f

openvswitch/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm OpenVSwitch
 name: openvswitch
-version: 0.1.17
+version: 0.1.18
 home: http://openvswitch.org
 icon: https://www.openstack.org/themes/openstack/images/project-mascots/Neutron/OpenStack_Project_Neutron_vertical.png
 sources:

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

@@ -147,6 +147,11 @@ function poststart () {
       sleep 1
   done
   chown {{ .Values.pod.user.nova.uid }}.{{ .Values.pod.user.nova.uid }} ${OVS_CTL}
+
+{{- if .Values.conf.poststart.extraCommand }}
+{{ .Values.conf.poststart.extraCommand | indent 2 }}
+{{- end }}
+
 }
 
 $COMMAND

openvswitch/values.yaml

@@ -211,6 +211,7 @@ conf:
   poststart:
     timeout: 5
     rootUser: "root"
+    extraCommand: null
   openvswitch_db_server:
     ptcp_port: null
   ovs_other_config:

releasenotes/notes/openvswitch.yaml

@@ -18,4 +18,5 @@ openvswitch:
   - 0.1.15 Add buffer before accesses ovs controller pid socket
   - 0.1.16 Restore ServiceAccount to openvswitch pod
   - 0.1.17 Add buffer to wait for potential new CTL file before running chown
+  - 0.1.18 Add value for extra poststart command
 ...