Monit with Puma, Sidekiq, Nginx, PostgreSQL, Disk space and Memory limits, using rbenv and nvm

app.conf

# /etc/monit/conf.d/app
set daemon 30 with start delay 60
set log "/srv/www/app/shared/log/monit.log" # syslog facility log_daemon
set httpd port 2812
  allow localhost
  allow login:password
  # with ssl {
  #   pemfile: /etc/ssl/certs/app_com.pem
  # }

set mailserver smtp.gmail.com port 587
  username "[email protected]" password "password"
  using tls
set alert [email protected] but not on { instance }
mail-format {
  from: app Monit <[email protected]>
  reply-to: [email protected]
  subject: [$HOST] $SERVICE $EVENT at $DATE
  message: Monit $ACTION $SERVICE at $DATE on $HOST: $DESCRIPTION.
           Yours sincerely,
           monit
}

### Disk Usage ###
check filesystem Ubuntu with path "/dev/vda1"
  if space usage > 90% then alert

### Nginx ###
check process nginx with pidfile "/run/nginx.pid"
  group www
  start program = "/etc/init.d/nginx start"
  stop program = "/etc/init.d/nginx stop"
  if cpu usage > 90% for 3 cycles then alert
  if cpu usage > 90% for 3 cycles then restart
  if memory usage > 90% for 3 cycles then alert
  if memory usage > 90% for 3 cycles then restart
  if failed host 127.0.0.1 port 80 protocol http
    then restart
  if 3 restarts within 9 cycles then alert
  if 5 restarts within 5 cycles then timeout

### Postgresql ###
check process postgresql
  with pidfile "/var/lib/postgresql/11/main/postmaster.pid"
  group database
  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 usage > 90% for 2 cycles then restart
  if memory usage > 90% 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"
  group database
  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 3 cycles then restart # stop?
  if cpu usage > 90% for 2 cycles then restart
  if memory usage > 90% for 2 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 "/srv/www/app/shared/tmp/pids/sidekiq-0.pid"
  depends on redis-server
  group queue
  start program = "/bin/su - bookshore -c 'cd /srv/www/app/current && PATH=$HOME/.nvm/versions/node/v10.13.0/bin:~/.rbenv/shims:~/.rbenv/bin:$PATH RBENV_ROOT=$HOME/.rbenv RBENV_VERSION=2.5.3 $HOME/.rbenv/bin/rbenv exec bundle exec sidekiq --index 0 --pidfile /srv/www/app/shared/tmp/pids/sidekiq-0.pid --environment production --logfile /srv/www/app/shared/log/sidekiq.log --config /srv/www/app/current/config/sidekiq.yml --daemon'"
  stop program = "/bin/su - bookshore -c 'cd /srv/www/app/current && RBENV_ROOT=$HOME/.rbenv RBENV_VERSION=2.5.3 $HOME/.rbenv/bin/rbenv exec bundle exec sidekiqctl stop /srv/www/app/shared/tmp/pids/sidekiq-0.pid 10'"
  if cpu usage > 90% then restart
  if memory usage > 90% for 2 cycles then restart
  if 3 restarts within 5 cycles then timeout

### Puma ###
check process puma_master
  with pidfile "/srv/www/app/shared/tmp/puma.pid"
  depends on postgresql, redis-server
  group ruby
  start program = "/bin/su - bookshore -c 'cd /srv/www/app/current && PATH=$HOME/.nvm/versions/node/v10.13.0/bin:~/.rbenv/shims:~/.rbenv/bin:$PATH RBENV_ROOT=$HOME/.rbenv RBENV_VERSION=2.5.3 $HOME/.rbenv/bin/rbenv exec bundle exec puma -C /srv/www/app/shared/config/puma.rb --daemon'"
  stop  program = "/bin/su - bookshore -c 'cd /srv/www/app/current && RBENV_ROOT=$HOME/.rbenv RBENV_VERSION=2.5.3 $HOME/.rbenv/bin/rbenv exec bundle exec pumactl -S /srv/www/app/shared/tmp/puma.state -F /srv/www/app/shared/config/puma.rb stop'"
  if cpu usage > 90% for 2 cycles then restart
  if memory usage > 94% for 2 cycles then restart
  if 3 restarts within 5 cycles then timeout