add notify script

image/service/keepalived/assets/keepalived.conf

@@ -1,4 +1,12 @@
-vrrp_instance vip-1 {
+vrrp_sync_group VG_1 {
+  group {
+    VI_1
+  }
+
+  {{ keepalived_notify }}
+}
+
+vrrp_instance VI_1 {
   interface {{ keepalived_interface }}
 
   track_interface {
@@ -22,6 +30,4 @@ vrrp_instance vip-1 {
     auth_type PASS
     auth_pass {{ keepalived_password }}
   }
-
-  {{ keepalived_notify }}
 }

image/service/keepalived/assets/notify-example.sh

@@ -1,20 +1,31 @@
 #!/bin/bash
 
+# for ANY state transition.
+# "notify" script is called AFTER the
+# notify_* script(s) and is executed
+# with 3 arguments provided by keepalived
+# (ie don't include parameters in the notify line).
+# arguments
+# $1 = "GROUP"|"INSTANCE"
+# $2 = name of group or instance
+# $3 = target state of transition
+#     ("MASTER"|"BACKUP"|"FAULT")
+
 TYPE=$1
 NAME=$2
 STATE=$3
 
 case $STATE in
-        "MASTER") echo "I'm the MASTER! Whup whup."
+        "MASTER") echo "I'm the MASTER! Whup whup." >> keepalived.info
                   exit 0
                   ;;
-        "BACKUP") "Ok, i'm just a backup, great."
+        "BACKUP") "Ok, i'm just a backup, great." >> keepalived.info
                   exit 0
                   ;;
-        "FAULT")  echo "Fault, what ?"
+        "FAULT")  echo "Fault, what ?" >> keepalived.info
                   exit 0
                   ;;
-        *)        echo "Unknown state"
+        *)        echo "Unknown state" >> keepalived.info
                   exit 1
                   ;;
 esac