Add monit chef handler

files/default/monit_handler.rb

@@ -0,0 +1,29 @@
+require "rubygems"
+require "chef"
+require "chef/handler"
+
+class MonitHandler < Chef::Handler
+
+  def initialize(opts = {})
+    @poll_period = opts[:poll_period] || 1
+  end
+
+  def success
+    Chef::Log.info "Monit monitor all succeeded"
+  end
+
+  def failure
+    Chef::Log.warn "Monit monitor all failed"
+  end
+
+  def report
+    if system("ps -e | grep `cat /var/run/monit.pid`")
+      return success if system("monit monitor all")
+      failure
+      Chef::Log.warn "Waiting #{@poll_period} seconds before trying again..."
+      return success if system("sleep #{@poll_period} && monit monitor all")
+      failure
+    end
+  end
+
+end

metadata.rb

@@ -5,6 +5,7 @@
 long_description IO.read(File.join(File.dirname(__FILE__), 'README.rdoc'))
 version          "0.7"
 
+depends "chef_handler"
 
 attribute 'monit/notify_email', 
   :description => 'The email address to send alerts to.',

recipes/handler.rb

@@ -0,0 +1,37 @@
+# Unmonitor services that might be manipulated by the chef run
+e = execute "monit unmonitor all" do
+  action :nothing
+  only_if "ps -e | grep -q `cat /var/run/monit.pid`"
+  ignore_failure true
+end
+e.run_action(:run)
+
+# Monitor chef-client in case it bails mid-run
+e = execute "monit monitor chef-client" do
+  action :nothing
+  only_if "ps -e | grep -q `cat /var/run/monit.pid` && monit summary | grep -q \"Process 'chef-client'\""
+  ignore_failure true
+end
+e.run_action(:run)
+
+# Install monit chef handler
+include_recipe "chef_handler"
+
+directory node["chef_handler"]["handler_path"] do
+  owner "root"
+  group "root"
+  mode  "0755"
+end
+
+handler_path = ::File.join(node["chef_handler"]["handler_path"], "monit_handler.rb")
+cookbook_file handler_path do
+  owner "root"
+  group "root"
+  mode  "0644"
+end
+
+chef_handler "MonitHandler" do
+  source handler_path
+  action :enable
+  arguments :poll_period => node["monit"]["poll_period"]
+end