initial commit

Makefile

@@ -0,0 +1,15 @@
+NAME		=		carp_faillover
+DESTDIR ?=	/usr/local
+prefix       ?= ${DESTDIR}/usr/local
+exec_prefix  ?= ${prefix}
+bindir       ?= ${exec_prefix}/bin
+sysconfdir   ?= ${prefix}/etc/${NAME}
+datarootdir  ?= ${prefix}/share
+datadir      ?= ${datarootdir}/${NAME}
+
+install:
+	install -D ${datadir}
+	install carp_failover.conf ${datadir}
+	install carp_failover ${exec_prefix}
+
+.PHONY: install

carp_failover

@@ -0,0 +1,40 @@
+#!/usr/bin/env sh
+
+to_backup() {
+	# NOOP
+}
+
+to_master() {
+	# NOOP
+}
+
+if [ ! -f "$1" ]; then
+	echo "Config file does not exist"
+	exit 1
+fi
+
+source "$1"
+if [ "$?" -gt "0" ]; then
+	echo "loading config file caused an error"
+	exit 1
+fi
+
+old_state=""
+while true; do
+  state="$(ifconfig | awk '/carp/ { print $2 }')"
+  if [ "$old_state" = "${state}" ]; then
+    sleep 10
+    continue
+  fi
+  if [ "$state" = "BACKUP" ]; then
+    logger "going into backup mode"
+		to_backup
+  elif [ "$state" = "MASTER" ]; then
+    logger "going into master mode"
+		to_master
+  else
+    logger "unknown state '${state}'!"
+  fi
+  old_state="$state"
+  sleep 10
+done

carp_failover.conf

@@ -0,0 +1,9 @@
+# Set the action when the node changes to BACKUP state.
+to_backup() {
+  logger "changed to backup"
+}
+
+# Set the action when the node changes to MASTER state.
+to_master() {
+  logger "changed to master"
+}