Monitoring with monit recipes

monit.rc

 check system localhost
    if loadavg (1min) > 8 then alert
    if loadavg (5min) > 4 then alert
    if memory usage > 75% then alert
    if cpu usage (user) > 70% for 8 cycles then alert
    if cpu usage (system) > 40% for 8 cycles then alert
    if cpu usage (wait) > 20%  for 8 cycles then alert

check process apache with pidfile /var/run/apache2.pid
    start program = "/etc/init.d/apache2 start"
    stop program  = "/etc/init.d/apache2 stop"
    if cpu > 60% for 3 cycles then alert
    if cpu > 80% for 5 cycles then restart
    if totalmem > 400.0 MB for 5 cycles then restart
    if children > 250 then restart
    if loadavg(5min) greater than 20 for 8 cycles then alert
    group server

check process redis
  with pidfile /home/ubuntu/public_html/mylinkedcare/shared/pids/redis.pid
  start program = "/usr/bin/redis-server /etc/redis/redis.conf"
  stop program = "/usr/bin/redis-cli shutdown"
  if failed host 127.0.0.1 port 6379 then restart
  if 5 restarts within 5 cycles then timeout

check file dump.rdb with path /var/lib/redis/dump.rdb
  if size > 100 MB then alert

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 failed host 127.0.0.1 port 80 then restart
  if cpu is greater than 40% for 2 cycles then alert
  if cpu > 60% for 5 cycles then restart 
  if 10 restarts within 10 cycles then timeout

check process mysqld with pidfile /var/lib/mysql/ns388683.pid
  group database
  start program = "/etc/init.d/mysql start"
  stop program = "/etc/init.d/mysql stop"
  if failed host 127.0.0.1 port 3306 then restart
  if 5 restarts within 5 cycles then timeout


check process postgresql with pidfile /var/run/postgresql/p.pid
 start program = “/etc/init.d/postgresql start”
 stop program = “/etc/init.d/postgresql stop”
 if failed unixsocket /var/run/postgresql/.s.PGSQL.5432 protocol pgsql then restart
 if failed unixsocket /var/run/postgresql/.s.PGSQL.5432 protocol pgsql then alert
 if failed host localhost port 5432 protocol pgsql then restart
 if failed host localhost port 5432 protocol pgsql then alert
 if 5 restarts within 5 cycles then timeout

check process sidekiq
  with pidfile /path/to/sidekiq.pid
  start program = "bundle exec sidekiq -C /path/to/sidekiq_conf.yml -P /path/to/sidekiq.pid" with timeout 90 seconds
  stop program = "kill -s TERM `cat /path/to/sidekiq.pid`" with timeout 90 seconds
  if totalmem is greater than 500 MB for 2 cycles then restart # eating up memory?
  group sidekiq