OvS: Implement cleaner shutdown and start logic

This PS adds cleaner shutdown and start logic to the OvS components.

Change-Id: I5c7fb212163a19d7584b37c20e7c6c757b498856
Co-Authored-By: SamYaple <sam@yaple.net>

openvswitch/templates/bin/_openvswitch-db-server.sh.tpl

@@ -17,15 +17,32 @@ limitations under the License.
 */}}
 
 set -ex
+COMMAND="${@:-start}"
 
-mkdir -p "/run/openvswitch"
+OVS_DB=/run/openvswitch/conf.db
-if [[ ! -e "/run/openvswitch/conf.db" ]]; then
+OVS_SOCKET=/run/openvswitch/db.sock
-  ovsdb-tool create "/run/openvswitch/conf.db"
+OVS_SCHEMA=/usr/share/openvswitch/vswitch.ovsschema
+
+function start () {
+  mkdir -p "$(dirname ${OVS_DB})"
+  if [[ ! -e "${OVS_DB}" ]]; then
+    ovsdb-tool create "${OVS_DB}"
+  fi
+
+  if [[ "$(ovsdb-tool needs-conversion ${OVS_DB} ${OVS_SCHEMA})" == 'yes' ]]; then
+      ovsdb-tool convert ${OVS_DB} ${OVS_SCHEMA}
   fi
 
   umask 000
-exec /usr/sbin/ovsdb-server /run/openvswitch/conf.db \
+  exec /usr/sbin/ovsdb-server ${OVS_DB} \
           -vconsole:emer \
           -vconsole:err \
           -vconsole:info \
-        --remote=punix:/run/openvswitch/db.sock
+          --remote=punix:${OVS_SOCKET}
+}
+
+function stop () {
+  ovs-appctl -T1 -t /run/openvswitch/ovsdb-server.1.ctl exit
+}
+
+$COMMAND

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

@@ -17,10 +17,13 @@ limitations under the License.
 */}}
 
 set -ex
+COMMAND="${@:-start}"
 
-sock="/var/run/openvswitch/db.sock"
+OVS_SOCKET=/run/openvswitch/db.sock
+
+function start () {
   t=0
-while [ ! -e "${sock}" ] ; do
+  while [ ! -e "${OVS_SOCKET}" ] ; do
       echo "waiting for ovs socket $sock"
       sleep 1
       t=$(($t+1))
@@ -56,8 +59,15 @@ if [ -n "{{- $br -}}" ] ; then
   fi
   {{- end }}
 
-exec /usr/sbin/ovs-vswitchd unix:/run/openvswitch/db.sock \
+  exec /usr/sbin/ovs-vswitchd unix:${OVS_SOCKET} \
           -vconsole:emer \
           -vconsole:err \
           -vconsole:info \
           --mlockall
+}
+
+function stop () {
+  ovs-appctl -T1 -t /run/openvswitch/ovs-vswitchd.1.ctl exit
+}
+
+$COMMAND

openvswitch/templates/daemonset-ovs-db.yaml

@@ -44,6 +44,13 @@ spec:
             privileged: true
           command:
             - /tmp/openvswitch-db-server.sh
+            - start
+          lifecycle:
+            preStop:
+              exec:
+                command:
+                  - /tmp/openvswitch-db-server.sh
+                  - stop
           volumeMounts:
             - name: openvswitch-bin
               mountPath: /tmp/openvswitch-db-server.sh

openvswitch/templates/daemonset-ovs-vswitchd.yaml

@@ -70,6 +70,13 @@ spec:
                 - show
           command:
             - /tmp/openvswitch-vswitchd.sh
+            - start
+          lifecycle:
+            preStop:
+              exec:
+                command:
+                  - /tmp/openvswitch-db-server.sh
+                  - stop
           volumeMounts:
             - name: openvswitch-bin
               mountPath: /tmp/openvswitch-vswitchd.sh