Keepalived leaves VIP on the host in case of accidental removal.

This patch removes VIPs when 'kolla-ansible destroy' is invoked.

Change-Id: I263b9bc852c7bc3448a6a15b3115b1f226071afc
Closes-Bug: #1605442

ansible/roles/destroy/tasks/cleanup_host.yml

@@ -1,6 +1,10 @@
 ---
 - name: Destroying Kolla host configuration
-  command: /tmp/kolla-cleanup/tools/cleanup-host
+  command: >
+    env enable_haproxy={{ enable_haproxy }}
+        kolla_internal_vip_address={{ kolla_internal_vip_address }}
+        kolla_external_vip_address={{ kolla_external_vip_address }}
+        /tmp/kolla-cleanup/tools/cleanup-host
 
 - name: Destroying kolla-cleanup folder
   file:

tools/cleanup-host

@@ -27,6 +27,18 @@ ip -o link show | awk -F': ' '/vxlan/{print $2}' | while read -r ifname ; do
     ip link delete $ifname type vxlan
 done
 
+# Keepalived leaves VIP on the host in case of accidental removal.
+# This snippet removes VIPs.
+if [[ "$enable_haproxy" == "yes" ]]; then
+  ip -o addr list | awk '{print $2,$4}' | cut -d/ -f1 | while read -r ifname ifaddr ; do
+    if [[ "$kolla_internal_vip_address" == "$ifaddr" ||
+          "$kolla_external_vip_address" == "$ifaddr" ]]; then
+      echo "Removing VIP $ifaddr on the host"
+      ip addr delete dev $ifname $ifaddr
+    fi
+  done
+fi
+
 echo "Creating a fstab backup..."
 sudo cp /etc/fstab /etc/fstab_backup