Fix installation with OVN backend and compilation

This patch fixes several issues related to the installation with
OVN backend with the OVS/OVN compilation enabled.

The OVS/OVN local directories prefix, when both services are compiled,
is now "/usr/local".

The "ovn_agent._run_process" function is calling "ovs-appctl" to
configure the logging settings of several services. Instead of
using the service name, the ctl socket file is used instead. That
is more robust and does not fail in systems with previous
installations.

Closes-Bug: #1960514

Change-Id: I69de5333393957593db6e05495f0c3c758efefdf

Author: ralonsoh

lib/neutron_plugins/ovn_agent

@@ -253,7 +253,12 @@ function _run_process {
 
     local testcmd="test -e $OVS_RUNDIR/$service.pid"
     test_with_retry "$testcmd" "$service did not start" $SERVICE_TIMEOUT 1
-    sudo ovs-appctl -t $service vlog/set console:off syslog:info file:info
+    local service_ctl_file
+    service_ctl_file=$(ls $OVS_RUNDIR | grep $service | grep ctl)
+    if [ -z "$service_ctl_file" ]; then
+        die $LINENO "ctl file for service $service is not present."
+    fi
+    sudo ovs-appctl -t $OVS_RUNDIR/$service_ctl_file vlog/set console:off syslog:info file:info
 }
 
 function clone_repository {

lib/neutron_plugins/ovs_base

@@ -68,7 +68,7 @@ function _neutron_ovs_base_install_ubuntu_dkms {
 function _neutron_ovs_base_install_agent_packages {
     if [ "$Q_BUILD_OVS_FROM_GIT" == "True" ]; then
         remove_ovs_packages
-        compile_ovs False /usr /var
+        compile_ovs False /usr/local /var
         load_conntrack_gre_module
         start_new_ovs
     else

lib/neutron_plugins/ovs_source

@@ -188,12 +188,12 @@ function action_openvswitch {
 # start_new_ovs() - removes old ovs database, creates a new one and starts ovs
 function start_new_ovs {
     sudo rm -f /etc/openvswitch/conf.db /etc/openvswitch/.conf.db~lock~
-    sudo /usr/share/openvswitch/scripts/ovs-ctl start
+    sudo /usr/local/share/openvswitch/scripts/ovs-ctl start
 }
 
 # stop_new_ovs() - stops ovs
 function stop_new_ovs {
-    local ovs_ctl='/usr/share/openvswitch/scripts/ovs-ctl'
+    local ovs_ctl='/usr/local/share/openvswitch/scripts/ovs-ctl'
 
     if [ -x $ovs_ctl ] ; then
         sudo $ovs_ctl stop