Systemd Sidekiq Capistrano

README.md

Systemd managed Sidekiq

This assumes that sidekiq.service is located in <rails root>/lib/services/sidekiq.service

sidekiq.rake

# Put in lib/capistrano/tasks/sidekiq.rake
namespace :sidekiq do
  after 'deploy:starting', 'sidekiq:quiet'
  after 'deploy:updating', 'sidekiq:update'
  after 'deploy:updated', 'sidekiq:stop'
  after 'deploy:reverted', 'sidekiq:stop'
  after 'deploy:published', 'sidekiq:start'

  desc 'Update sidekiq service'
  task :update do
    on roles(:worker) do
      file_path = "#{release_path}/lib/services/sidekiq.service"
      service = '/lib/systemd/system/sidekiq.service'
      config_exists = test("[ -f #{service} ]")
      if config_exists && test("diff #{service} #{file_path}")
        # no-op
      else
        if config_exists
          execute :sudo, 'systemctl', 'disable', 'sidekiq.service', raise_on_non_zero_exit: false
        end
        execute :sudo, 'cp', '--remove-destination', file_path, service
        execute :sudo, 'systemctl', 'daemon-reload'
        execute :sudo, 'systemctl', 'enable', 'sidekiq.service'
      end
    end
  end

  desc 'Quiet Sidekiq service'
  task :quiet do
    on roles(:worker) do
      execute :sudo, 'pgrep', '-f', 'sidekiq', '|', 'xargs', 'kill', '-USR1'
    end
  end

  desc 'Start Sidekiq service'
  task :start do
    on roles(:worker) do
      execute :sudo, 'systemctl', 'start', 'sidekiq.service'
    end
  end

  desc 'Stop Sidekiq service'
  task :stop do
    on roles(:worker) do
      execute :sudo, 'systemctl', 'stop', 'sidekiq.service'
    end
  end
end

sidekiq.service

# Put in lib/services/sidekiq.service
[Unit]
Description=sidekiq
After=syslog.target network.target

[Service]
Type=simple
WorkingDirectory=/mnt/apps/app_name_production/current
ExecStart=/bin/bash -lc 'bundle exec sidekiq -C config/sidekiq.yml -e production'
User=ubuntu
Group=ubuntu
UMask=0002

RestartSec=1
Restart=on-failure

StandardOutput=syslog
StandardError=syslog

SyslogIdentifier=sidekiq

[Install]
WantedBy=multi-user.target