How to get systemd to restart Rails App with Puma

Question

I\'ve been struggling with this a week now and really can\'t seem to find an answer. I\'ve deployed my Rails App with Capistrano. I use Puma as a server.

When I deploy,

Answer 1

Have you looked into Foreman ? Foreman makes it easy to start and stop your application if it has multiple processes. Incidentally it also provides an export function that can generate some systemd or upstart scripts for you to (re)start and stop your application.

As you are already using capistrano you can use capistrano-foreman to integrate all this nicely with capistrano.

I hope you find some use in these resources

Answer 2

At the end the problem was twofold: 1) rvm wasn't installed properly for all users, which meant the deployer user didn't have ruby/bundle/etc available and secondarily the script was also wrong. For reference below is the revised script that worked for me:

[Unit]
Description=Puma HTTP Server
After=network.target

[Service]
Type=simple

User=deployer

WorkingDirectory=/var/www/apps/MRCbe/current

ExecStart=/bin/bash -lc 'bundle exec puma -C /var/www/apps/MRCbe/shared/puma.rb'

Restart=always

[Install]
WantedBy=multi-user.target