Top Level Namespace

Defined Under Namespace

Classes: RunitServiceBuilder

Instance Method Summary collapse

Instance Method Details

#runit_service(name, &block) ⇒ Object

Defines a runit service.

Examples:


# A runit directory that your deploy user can write to.
# You can set one of these up using runsvdir.

set :runit_service_dir, '/etc/service'

# The first argument is the name of the service.
# The remainder are passed to "on" to decide
# which servers to use
runit_service 'sidekiq', roles(:sidekiq) do

  # required, a bash script that execs your app
  run <<-EOF
#!/bin/bash
cd /var/www/app
exec bundle exec sidekiq 2>&1
  EOF

  # optional, a log script that reads stdin/stdout
  log <<-EOF
#!/bin/bash
mkdir -p /var/log/app/sidekiq
exec syslogd -tt /var/log/app/sidekiq
  EOF

  # optional, a finish script that runs when your app quits
  finish <<-EOF
#!/bin/bash
echo 'QUIT' >> /var/log/app/sidekiq/current
  EOF

end


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# File 'lib/cap-runit.rb', line 75

def runit_service(name, &block)
  runit_service_dir = fetch(:runit_service_dir)

  service = RunitServiceBuilder.new(&block)

  namespace name do
    desc "Configure #{name} runit"
    task :configure do
      on roles(service.roles), in: :groups, limit: 4 do
        unless test("[ -e #{runit_service_dir}/#{name}/run ]")
          execute <<-EOF
          rm -rf #{runit_service_dir}/#{name}
          mkdir -p #{runit_service_dir}/#{name}/log
          EOF

          upload! StringIO.new(service.run), "#{runit_service_dir}/#{name}/run"

          if service.log
            upload! StringIO.new(service.log), "#{runit_service_dir}/#{name}/log/run"
          end

          if service.finish
            upload! StringIO.new(service.finish), "#{runit_service_dir}/#{name}/finish"
          end

          execute "chmod +x #{runit_service_dir}/#{name}/run #{runit_service_dir}/#{name}/log/run"
        end
      end
    end

    desc "Start #{name}"
    task start: :configure do
      on roles(*service.roles), in: :groups, limit: 4 do
        execute "sv start #{runit_service_dir}/#{name}"
      end
    end

    desc "Stop #{name}"
    task :stop do
      on roles(*service.roles), in: :groups, limit: 4 do
        execute "sv stop #{runit_service_dir}/#{name}"
      end
    end

    desc "Force stop #{name}"
    task :force_stop do
      on roles(*service.roles), in: :groups, limit: 4 do
        execute "sv force-stop #{runit_service_dir}/#{name} || true"
      end
    end
    task :'force-stop' => :force_stop

    desc "Restart #{name}"
    task restart: :configure do
      on roles(*service.roles), in: :groups, limit: 4 do
        execute "sv restart #{runit_service_dir}/#{name}"
      end
    end

    desc "Force restart #{name}"
    task force_restart: :configure do
      on roles(*service.roles), in: :groups, limit: 4 do
        execute "sv force-restart #{runit_service_dir}/#{name} || true"
      end
    end
    task :'force-restart' => :force_restart

    desc "Disable #{name}"
    task :disable do
      on roles(*service.roles), in: :groups, limit: 4 do
        execute "rm -rf #{runit_service_dir}/#{name}"
      end
    end
  end
end