cm-cpu-agent only support libvirt driver

ceilometer-compute-agent only support libvirt driver

Change-Id: I8b92ef10f52388ead11f8ce51c9ab119f953efae
diff --git a/lib/ceilometer b/lib/ceilometer
index f95ed30..dcadb07 100644
--- a/lib/ceilometer
+++ b/lib/ceilometer
@@ -137,7 +137,9 @@
 
 # start_ceilometer() - Start running processes, including screen
 function start_ceilometer() {
-    screen_it ceilometer-acompute "cd ; sg $LIBVIRT_GROUP \"ceilometer-agent-compute --config-file $CEILOMETER_CONF\""
+    if [[ "$VIRT_DRIVER" = 'libvirt' ]]; then
+        screen_it ceilometer-acompute "cd ; sg $LIBVIRT_GROUP \"ceilometer-agent-compute --config-file $CEILOMETER_CONF\""
+    fi
     screen_it ceilometer-acentral "cd ; ceilometer-agent-central --config-file $CEILOMETER_CONF"
     screen_it ceilometer-collector "cd ; ceilometer-collector --config-file $CEILOMETER_CONF"
     screen_it ceilometer-api "cd ; ceilometer-api -d -v --log-dir=$CEILOMETER_API_LOG_DIR --config-file $CEILOMETER_CONF"