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CREATE_SAMPLE_APPLICATION  view on Meta::CPAN

To start your application as Linux service
If you plan to use a reverse proxy change the listening IP (BIND) from  0.0.0.0  to  127.0.0.1
Locate the plackup with "find /usr/bin -name plackup -type f" e.g  /usr/bin/site_perl/plackup
Edit/create the file  /etc/systemd/system/TestService.service

  [Unit]
  Description=TestService rest API
  Documentation=https://metacpan.org/pod/Dancer2
  After=network.target
  ConditionPathExists=/usr/bin/site_perl/plackup

  [Service]
  Type=simple
  User=dancer
  Group=dancer
  Environment=BIND=0.0.0.0
  Environment=PORT=3000
  Environment=WORKERS=10
  Environment=ENVIROMENT=development
  ExecStart=/usr/bin/site_perl/plackup --host $BIND --port $PORT --env $ENVIROMENT --server Starman --workers=$WORKERS --app /home/dancer/TestService/bin/app.psgi
  WorkingDirectory=/home/dancer/TestService
  ExecStop=/bin/kill -s QUIT $MAINPID
  KillMode=mixed
  KillSignal=QUIT
  StandardOutput=journal
  StandardError=journal
  NoNewPrivileges=true
  PrivateTmp=true
  LimitNOFILE=infinity
  Restart=on-failure
  RestartSec=60s

  [Install]
  WantedBy=multi-user.target

start the service

  systemd-analyze verify /etc/systemd/system/TestService.service
  systemctl daemon-reload
  systemctl cat       TestService
  systemctl enable    TestService.service
  systemctl start     TestService
  systemctl is-active TestService
  systemctl status    TestService
  journalctl -f -xelu TestService
  systemctl stop      TestService

delete the service

  systemctl stop      TestService
  systemctl disable   TestService.service
  unlink /etc/systemd/system/TestService.service


If you use an nginx web server to reverse proxy you service your app
vi nginx.conf 

  ...
  upstream TestService { server 127.0.0.1:3000 fail_timeout=0; keepalive 1024; }
  ...
  server
  {
  server_name      www.example.com;
  listen           30080;
  listen           30443 ssl;
  root             /tmp;
  proxy_redirect   off;
  proxy_set_header Host $host;
  proxy_set_header X-Real-IP $remote_addr; # needed for real client IP pass as server enviroment variable HTTP_X_REAL_IP
  
      location /
      {
      fastcgi_param REMOTE_ADDR X-Real-IP;
      proxy_pass http://TestService;
      } 
  }