examples/gravatar.god

   1 # run with:  god -c /path/to/gravatar.god
   2 #
   3 # This is the actual config file used to keep the mongrels of
   4 # gravatar.com running.
   5
   6 RAILS_ROOT = "/var/www/gravatar2/current"
   7
   8 God.meddle do |god|
   9   %w{8200 8201 8202}.each do |port|
  10     god.watch do |w|
  11       w.name = "gravatar2-mongrel-#{port}"
  12       w.interval = 30 # seconds
  13       w.start = "mongrel_rails cluster::start --only #{port} \
  14         -C #{RAILS_ROOT}/config/mongrel_cluster.yml"
  15       w.stop = "mongrel_rails cluster::stop --only #{port} \
  16         -C #{RAILS_ROOT}/config/mongrel_cluster.yml"
  17       w.grace = 10 # seconds
  18
  19       pid_file = File.join(RAILS_ROOT, "log/mongrel.#{port}.pid")
  20
  21       w.behavior(:clean_pid_file) do |b|
  22         b.pid_file = pid_file
  23       end
  24
  25       w.start_if do |start|
  26         start.condition(:process_running) do |c|
  27           c.interval = 5 # seconds
  28           c.running = false
  29           c.pid_file = pid_file
  30         end
  31       end
  32
  33       w.restart_if do |restart|
  34         restart.condition(:memory_usage) do |c|
  35           c.pid_file = pid_file
  36           c.above = (150 * 1024) # 150mb
  37           c.times = [3, 5] # 3 out of 5 intervals
  38         end
  39
  40         restart.condition(:cpu_usage) do |c|
  41           c.pid_file = pid_file
  42           c.above = 50 # percent
  43           c.times = 5
  44         end
  45       end
  46     end
  47   end
  48 end