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nginx, unicorn, postgresql, redis, sidekiq, elasticsearch configs for monit
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| # /etc/monit/conf-enabled/qna.monit.rc | |
| ### 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 65.108.50.164 port 80 protocol http | |
| then restart | |
| if 3 restarts within 5 cycles then timeout | |
| ### Unicorn ### | |
| check process unicorn | |
| with pidfile "/home/deploy/qna/shared/tmp/pids/unicorn.pid" | |
| start program = "/bin/su - deploy -c 'cd /home/deploy/qna/current && /home/deploy/.rvm/bin/rvm default do bundle exec unicorn -c /home/deploy/qna/current/config/unicorn/production.rb -E deployment -D'" | |
| stop program = "bin/su - deploy -c 'kill -s QUIT `cat /home/deploy/qna/current/tmp/pids/unicorn.pid`'" | |
| if cpu usage > 90% for 2 cycles then restart | |
| if memory usage > 90% for 3 cycles then restart | |
| if 5 restarts within 5 cycles then unmonitor | |
| ### 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/qna/shared/tmp/pids/sidekiq-0.pid" | |
| with matching "sidekiq" | |
| # start program = "/bin/su - deploy -c 'cd /home/deploy/qna/current && /home/deploy/.rvm/bin/rvm default do bundle exec sidekiq --index 0 --pidfile /home/deploy/qna/shared/tmp/pids/sidekiq-0.pid --environment producti> | |
| # stop program = "/bin/su - deploy -c 'cd /home/deploy/qna/current && /home/deploy/.rvm/bin/rvm default do bundle exec sidekiqctl stop /home/deploy/qna/shared/tmp/pids/sidekiq-0.pid 10'" | |
| start program = "/bin/su - deploy -c 'cd /home/deploy/qna/current && systemctl --user start sidekiq'" | |
| stop program = "/bin/su - deploy -c 'cd /home/deploy/qna/current && systemctl --user stop sidekiq'" | |
| if cpu > 80% then restart | |
| if memory usage > 80% for 2 cycles then restart | |
| if 3 restarts within 3 cycles then timeout | |
| ### Elasticsearch ### | |
| check process elasticsearch | |
| # with matching "elasticsearch" | |
| with pidfile "/var/run/elasticsearch/elasticsearch.pid" | |
| start program = "/usr/sbin/service elasticsearch start" | |
| stop program = "/usr/sbin/service elasticsearch stop" | |
| if cpu usage > 80% for 2 cycles then restart | |
| if memory usage > 80% for 4 cycles then restart | |
| if 3 restarts within 3 cycles then unmonitor |
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A couple of interesting links about sidekiq with/and/for monit: