openvswitch: use pidfile option

Make appctl to search pidfile for exit command as pid 1 is not
always the target process in some cases. For example, pid 1 is
"pause" when pid namespace sharing is enabled in your k8s cluster.

Change-Id: I90e202245a9522fe53bea7e1f047061a0a280834

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

@@ -22,6 +22,7 @@ COMMAND="${@:-start}"
 OVS_DB=/run/openvswitch/conf.db
 OVS_SOCKET=/run/openvswitch/db.sock
 OVS_SCHEMA=/usr/share/openvswitch/vswitch.ovsschema
+OVS_PID=/run/openvswitch/ovsdb-server.pid
 
 function start () {
   mkdir -p "$(dirname ${OVS_DB})"
@@ -38,11 +39,13 @@ function start () {
           -vconsole:emer \
           -vconsole:err \
           -vconsole:info \
+          --pidfile=${OVS_PID} \
           --remote=punix:${OVS_SOCKET}
 }
 
 function stop () {
-  ovs-appctl -T1 -t /run/openvswitch/ovsdb-server.1.ctl exit
+  PID=$(cat $OVS_PID)
+  ovs-appctl -T1 -t /run/openvswitch/ovsdb-server.${PID}.ctl exit
 }
 
 $COMMAND

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

@@ -20,6 +20,7 @@ set -ex
 COMMAND="${@:-start}"
 
 OVS_SOCKET=/run/openvswitch/db.sock
+OVS_PID=/run/openvswitch/ovs-vswitchd.pid
 
 function start () {
   t=0
@@ -63,11 +64,13 @@ function start () {
           -vconsole:emer \
           -vconsole:err \
           -vconsole:info \
+          --pidfile=${OVS_PID} \
           --mlockall
 }
 
 function stop () {
-  ovs-appctl -T1 -t /run/openvswitch/ovs-vswitchd.1.ctl exit
+  PID=$(cat $OVS_PID)
+  ovs-appctl -T1 -t /run/openvswitch/ovs-vswitchd.${PID}.ctl exit
 }
 
 $COMMAND