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@surendrans
Forked from shapeshed/unicorn
Last active Aug 29, 2015
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#!/bin/sh
set -e
# Example init script, this can be used with nginx, too,
# since nginx and unicorn accept the same signals
# Feel free to change any of the following variables for your app:
TIMEOUT=${TIMEOUT-60}
APP_ROOT=/path/to/your/app/current
PID=$APP_ROOT/tmp/pids/unicorn.pid
ENVIRONMENT=production
CMD="cd $APP_ROOT; bundle exec unicorn -E $ENVIRONMENT -D -c $APP_ROOT/config/unicorn.rb"
action="$1"
set -u
old_pid="$PID.oldbin"
cd $APP_ROOT || exit 1
sig () {
test -s "$PID" && kill -$1 `cat $PID`
}
oldsig () {
test -s $old_pid && kill -$1 `cat $old_pid`
}
workersig () {
workerpid="$APP_ROOT/tmp/pids/unicorn.$2.pid"
test -s "$workerpid" && kill -$1 `cat $workerpid`
}
case $action in
m start)
sig 0 && echo >&2 "Already running" && exit 0
su - rails -c "$CMD"
;;
stop)
sig QUIT && exit 0
echo >&2 "Not running"
;;
force-stop)
sig TERM && exit 0
echo >&2 "Not running"
;;
restart|reload)
sig HUP && echo reloaded OK && exit 0
echo >&2 "Couldn't reload, starting '$CMD' instead"
su - rails -c "$CMD"
;;
upgrade)
if sig USR2 && sleep 20 && sig 0 && oldsig QUIT
then
n=$TIMEOUT
while test -s $old_pid && test $n -ge 0
do
printf '.' && sleep 1 && n=$(( $n - 1 ))
done
echo
if test $n -lt 0 && test -s $old_pid
then
echo >&2 "$old_pid still exists after $TIMEOUT seconds"
exit 1
fi
exit 0
fi
echo >&2 "Couldn't upgrade, starting '$CMD' instead"
su - rails -c "$CMD"
;;
kill_worker)
workersig QUIT $2 && exit 0
echo >&2 "Worker not running"
;;
reopen-logs)
sig USR1
;;
*)
echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop|reopen-logs>"
exit 1
;;
esac
APP_ROOT = File.expand_path(File.dirname(File.dirname(__FILE__)))
if ENV['MY_RUBY_HOME'] && ENV['MY_RUBY_HOME'].include?('rvm')
begin
rvm_path = File.dirname(File.dirname(ENV['MY_RUBY_HOME']))
rvm_lib_path = File.join(rvm_path, 'lib')
$LOAD_PATH.unshift rvm_lib_path
require 'rvm'
RVM.use_from_path! APP_ROOT
rescue LoadError
raise "RVM ruby lib is currently unavailable."
end
end
ENV['BUNDLE_GEMFILE'] = File.expand_path('../Gemfile', File.dirname(__FILE__))
require 'bundler/setup'
worker_processes 1
working_directory APP_ROOT
preload_app true
timeout 30
listen APP_ROOT + "/tmp/sockets/unicorn.sock", :backlog => 64
pid APP_ROOT + "/tmp/pids/unicorn.pid"
stderr_path APP_ROOT + "/log/unicorn.stderr.log"
stdout_path APP_ROOT + "/log/unicorn.stdout.log"
before_fork do |server, worker|
defined?(ActiveRecord::Base) && ActiveRecord::Base.connection.disconnect!
old_pid = Rails.root + '/tmp/pids/unicorn.pid.oldbin'
if File.exists?(old_pid) && server.pid != old_pid
begin
Process.kill("QUIT", File.read(old_pid).to_i)
rescue Errno::ENOENT, Errno::ESRCH
puts "Old master alerady dead"
end
end
end
after_fork do |server, worker|
defined?(ActiveRecord::Base) && ActiveRecord::Base.establish_connection
child_pid = server.config[:pid].sub('.pid', ".#{worker.nr}.pid")
system("echo #{Process.pid} > #{child_pid}")
end
check process unicorn_worker_0
with pidfile /path/to/your/app/shared/pids/unicorn.0.pid
start program = "/bin/cat /dev/null"
stop program = "/etc/init.d/unicorn kill_worker 0"
if mem is greater than 175.0 MB for 1 cycles then restart
if cpu is greater than 22% for 2 cycles then alert
if cpu is greater than 25% for 1 cycles then restart
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