VPC VR: return UNKNOWN redundant state if no guest nics (apache#11518)

* VPC VR: return UNKNOWN redundant state if no guest nics

Author: weizhouapache

systemvm/debian/opt/cloud/bin/checkrouter.sh

@@ -18,13 +18,33 @@
 
 STATUS=UNKNOWN
 
+get_guest_nics() {
+  python3 -c "
+import json
+data = json.load(open('/etc/cloudstack/ips.json'))
+for nic, objs in data.items():
+  if isinstance(objs, list):
+      for obj in objs:
+          if obj.get('nw_type') == 'guest' and obj.get('add'):
+              print(nic)
+                    "
+}
+
+ROUTER_TYPE=$(cat /etc/cloudstack/cmdline.json | grep type | awk '{print $2;}' | sed -e 's/[,\"]//g')
+if [ "$ROUTER_TYPE" = "vpcrouter" ];then
+    GUEST_NICS=$(get_guest_nics)
+    if [ "$GUEST_NICS" = "" ];then
+        echo "Status: ${STATUS}"
+        exit
+    fi
+fi
+
 if [ "$(systemctl is-active keepalived)" != "active" ]
 then
     echo "Status: FAULT"
     exit
 fi
 
-ROUTER_TYPE=$(cat /etc/cloudstack/cmdline.json | grep type | awk '{print $2;}' | sed -e 's/[,\"]//g')
 if [ "$ROUTER_TYPE" = "router" ]
 then
 	ROUTER_STATE=$(ip -4 addr show dev eth0 | grep inet | wc -l | xargs bash -c  'if [ $0 == 2 ]; then echo "PRIMARY"; else echo "BACKUP"; fi')