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Monit rules for typical rails app
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| ### Nginx ### | |
| check process nginx with pidfile /run/nginx.pid | |
| start program = "/usr/sbin/service nginx start" | |
| stop program = "/usr/sbin/service 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 localhost port 80 protocol http | |
| then restart | |
| if 3 restarts within 5 cycles then timeout | |
| ### Puma ### | |
| check process puma with pidfile "/home/deploy/tms/shared/tmp/pids/puma.pid" | |
| start program = "/usr/bin/sudo -iu deploy /bin/bash -c 'cd /home/deploy/tms/current && ~/.rvm/bin/rvm default do bundle exec puma -C /home/deploy/tms/shared/puma.rb --daemon'" | |
| stop program = "/usr/bin/sudo -iu deploy /bin/bash -c 'cd /home/deploy/tms/current && ~/.rvm/bin/rvm default do bundle exec pumactl -S /home/deploy/tms/shared/tmp/pids/puma.state stop'" | |
| ### Postgresql ### | |
| check process postgresql with pidfile /var/run/postgresql/12-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% 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 = "/usr/sbin/service redis start" | |
| stop program = "/usr/sbin/service redis 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/deploy/tms/shared/tmp/pids/sidekiq-0.pid" | |
| start program = "/bin/su - deploy -c 'cd /home/deploy/tms/current && /home/deploy/.rvm/bin/rvm default do bundle exec sidekiq --index 0 --pidfile /home/deploy/tms/shared/tmp/pids/sidekiq-0.pid --environment production --logfile /home/deploy/tms/shared/log/sidekiq.log --daemon'" | |
| stop program = "/bin/su - deploy -c 'cd /home/deploy/tms/current && /home/deploy/.rvm/bin/rvm default do bundle exec sidekiqctl stop /home/deploy/tms/shared/tmp/pids/sidekiq-0.pid 10'" | |
| if cpu > 80% then restart | |
| if memory usage > 80% for 2 cycles then restart | |
| if 3 restarts within 3 cycles then timeout |
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