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# == God config file
# http://god.rubyforge.org/
# Authors: Gump and michael@glauche.de
#
# Config file for god that configures watches for each instance of a thin server for
# each thin configuration file found in /etc/thin.
# In order to get it working on Ubuntu, I had to make a change to god as noted at
# the following blog:
# http://blog.alexgirard.com/ruby-one-line-to-save-god/
#
require 'yaml'
config_path = "/etc/thin"
Dir[config_path + "/*.yml"].each do |file|
config = YAML.load_file(file)
num_servers = config["servers"] ||= 1
(0...num_servers).each do |i|
# UNIX socket cluster use number 0 to 2 (for 3 servers)
# and tcp cluster use port number 3000 to 3002.
number = config['socket'] ? i : (config['port'] + i)
God.watch do |w|
w.group = "thin-" + File.basename(file, ".yml")
w.name = w.group + "-#{number}"
w.interval = 30.seconds
w.uid = config["user"]
w.gid = config["group"]
w.start = "thin start -C #{file} -o #{number}"
w.start_grace = 10.seconds
w.stop = "thin stop -C #{file} -o #{number}"
w.stop_grace = 10.seconds
w.restart = "thin restart -C #{file} -o #{number}"
pid_path = config["chdir"] + "/" + config["pid"]
ext = File.extname(pid_path)
w.pid_file = pid_path.gsub(/#{ext}$/, ".#{number}#{ext}")
w.behavior(:clean_pid_file)
w.start_if do |start|
start.condition(:process_running) do |c|
c.interval = 5.seconds
c.running = false
end
end
w.restart_if do |restart|
restart.condition(:memory_usage) do |c|
c.above = 150.megabytes
c.times = [3,5] # 3 out of 5 intervals
end
restart.condition(:cpu_usage) do |c|
c.above = 50.percent
c.times = 5
end
end
w.lifecycle do |on|
on.condition(:flapping) do |c|
c.to_state = [:start, :restart]
c.times = 5
c.within = 5.minutes
c.transition = :unmonitored
c.retry_in = 10.minutes
c.retry_times = 5
c.retry_within = 2.hours
end
end
end
end
end