#systemd unit file service for unicorn 5.x / Centos 7.x
[Unit]
Description=unicorn - app xxx
#After=nginx.service

[Service]
Type=forking
PIDFile=/DOCROOT/shared/tmp/pids/unicorn.pid
User=appuser
Group=appgroupname
WorkingDirectory=/DOCROOT/current
#Below, the rack env is set-up to none for production. It could be rewrited by rails init (you should export RAILS_ENV to the system)
ExecStart=/usr/local/rvm/wrappers/ruby-2.3.0/unicorn -c /DOCROOT/current/config/unicorn.rb -E none -D
ExecStop=/usr/bin/kill -QUIT $MAINPID
#USR2 signal will spawn the new master process, the kill signal to the old master should be send from rails
ExecReload=/bin/kill -s SIGUSR2 $MAINPID
CPUAccounting=true
MemoryAccounting=true
BlockIOAccounting=true
PrivateTmp=true
NoNewPrivileges=true

[Install]
WantedBy=multi-user.target