Added stacklight_control_vip class

We need to add vrrp pidof check for glusterd process
on a control (ctl*) node, where keepalive with glusterfs
is normally deployed.

Change-Id: I151342fe6adf176291007ff0e054aa67dc2450e3
Related-Bug: PROD-19814
diff --git a/keepalived/cluster/instance/stacklight_control_vip.yml b/keepalived/cluster/instance/stacklight_control_vip.yml
new file mode 100644
index 0000000..15e507b
--- /dev/null
+++ b/keepalived/cluster/instance/stacklight_control_vip.yml
@@ -0,0 +1,31 @@
+# This instance is needed for the case, where on control node the GlusterFS is deployed with keepalived and
+# a `remote_agent` from `Stacklight` sends its queries to the control's VIP to gather the GlusterFS data.
+# In case of `glusterd` process failure, the VIP should be moved to another node, to prevent `remote_agent` from failing.
+# In addition, check for haproxy process too, as on its failure VIP should be also moved to another node.
+classes:
+- service.keepalived.support
+parameters:
+  _param:
+    keepalived_stacklight_control_vip_address: ${_param:keepalived_vip_address}
+    keepalived_stacklight_control_vip_password: ${_param:keepalived_vip_password}
+    keepalived_stacklight_control_vip_interface: ${_param:keepalived_vip_interface}
+    keepalived_stacklight_control_vip_priority: ${_param:keepalived_vip_priority}
+    keepalived_stacklight_control_vip_virtual_router_id: ${_param:keepalived_vip_virtual_router_id}
+    keepalived_stacklight_control_vip_vrrp_check_script_content: "pidof glusterd && pidof haproxy"
+  keepalived:
+    cluster:
+      vrrp_scripts:
+        vrrp_check:
+          content: ${_param:keepalived_stacklight_control_vip_vrrp_check_script_content}
+          interval: 10
+          rise: 1
+          fall: 1
+      enabled: true
+      instance:
+        VIP:
+          address: ${_param:keepalived_stacklight_control_vip_address}
+          password: ${_param:keepalived_stacklight_control_vip_password}
+          interface: ${_param:keepalived_stacklight_control_vip_interface}
+          priority: ${_param:keepalived_stacklight_control_vip_priority}
+          virtual_router_id: ${_param:keepalived_stacklight_control_vip_virtual_router_id}
+          track_script: vrrp_check