Add a monit recipe to monitor and restart riak, for use in conjunctio…

…n with the monit cookbook. Monit implementation has its own recipe, so it will not affect any nodes that do not specifically add it to their run list.

attributes/monit.rb

@@ -0,0 +1,4 @@
+default.riak.monit.process_matching = "/usr/lib/riak/erts-5.8.5/bin/beam.smp"
+default.riak.monit.start_program = "/usr/sbin/riak"
+default.riak.monit.http_host = "localhost"
+default.riak.monit.http_port = "8098"

recipes/monit.rb

@@ -0,0 +1,14 @@
+# This is an optional recipe that provides monit monitoring of your riak node. Requires the monit cookbook.
+
+include_recipe "monit::default"
+
+monitrc "riak" do
+  variables(
+    :process_matching => node[:riak][:monit][:process_matching],
+    :start_program => node[:riak][:monit][:start_program],
+    :http_host => node[:riak][:monit][:http_host],
+    :http_port => node[:riak][:monit][:http_port]
+  )
+  template_source "riak-monit.conf.erb"
+  template_cookbook "riak"
+end

templates/default/riak-monit.conf.erb

@@ -0,0 +1,7 @@
+check process riak matching "<%= @process_matching %>"
+  group riak
+  start program = "<%= @start_program %>"
+  if failed host <%= @http_host %> port <%= @http_port %> protocol http
+    and request "/"
+    with timeout 2 seconds for 2 cycles
+  then restart