monit

### Unicorn ###
check process unicorn
  with pidfile "/home/deployer/qna/current/tmp/pids/unicorn.pid"
  start program = "/bin/su - deployer -c 'cd /home/deployer/qna/current && /home/deployer/.rvm/bin/rvm default do bundle exec unicorn -c /home/deployer/qna/current/config/unicorn/production.rb -E deployment -D'"
  stop program = "/bin/su - deployer -c 'cd /home/deployer/qna/current && /home/deployer/.rvm/bin/rvm default do bundle exeс kill -s USR2 `cat /home/deployer/qna/current/tmp/pids/unicorn.pid`'"
  if memory usage > 90% for 3 cycles then restart
  if cpu > 90% for 2 cycles then restart
  if 5 restarts within 5 cycles then timeout

### Nginx ###
check process nginx with pidfile /opt/nginx/logs/nginx.pid
  start program = "/etc/init.d/nginx start"
  stop program = "/etc/init.d/nginx stop"
  if cpu > 60% for 2 cycles then alert
  if cpu > 80% for 5 cycles then restart
  if memory usage > 80% for 5 cycles then restart
  if failed host 127.0.0.1 port 80 protocol http
    then restart
  if 3 restarts within 5 cycles then timeout

### Postgresql ###
check process postgresql
  with pidfile "/var/run/postgresql/9.3-main.pid"
  start program = "/usr/sbin/service postgresql start"
  stop  program = "/usr/sbin/service postgresql stop"
  if failed host localhost port 5432 protocol pgsql then restart
  if cpu > 80% for 5 cycles then restart
  if memory usage > 80% for 2 cycles then restart
  if 5 restarts within 5 cycles then timeout

### Redis ###
check process redis-server
    with pidfile "/var/run/redis/redis-server.pid"
    start program = "/etc/init.d/redis-server start"
    stop program = "/etc/init.d/redis-server stop"
    if totalmem > 100 Mb then alert
    if children > 255 for 5 cycles then stop
    if cpu usage > 95% for 3 cycles then restart
    if memory usage > 80% for 5 cycles then restart
    if failed host 127.0.0.1 port 6379 then restart
    if 5 restarts within 5 cycles then timeout

### Sidekiq ###
check process sidekiq
  with pidfile "/home/deployer/qna/current/tmp/pids/sidekiq.pid"
  start program = "/bin/su - deployer -c 'cd /home/deployer/qna/current && /home/deployer/.rvm/bin/rvm default do bundle exec unicorn -c /home/deployer/qna/current/config/unicorn/production.rb -E deployment -D'"
  if cpu > 80% then restart
  if memory usage > 80% for 2 cycles then restart
  if 3 restarts within 3 cycles then timeout

### Sphinx ###
check process sphinx
  with pidfile "/home/deployer/qna/shared/log/production.sphinx.pid"
  start program = "/bin/su - deployer -c 'cd /home/deployer/qna/current && /home/deployer/.rvm/bin/rvm default do bundle exec rake RAILS_ENV=production ts:start'"
  stop program = "/bin/su - deployer -c 'cd /home/deployer/qna/current && /home/deployer/.rvm/bin/rvm default do bundle exec rake RAILS_ENV=production ts:stop'"
  if cpu > 80% then restart
  if memory usage > 80% for 2 cycles then restart
  if 3 restarts within 3 cycles then timeout