Running "npm start" App As a Systemd Service

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====== Running "npm start" App As a Systemd Service ======
If you have a npm app that is launched with "npm start" and want to run it as a systemd service in the background without a user, this is how. \\
Please keep in mind this is really a tutorial how I personally set this up to run [[laptopwiki:guides:discord:stickybot|Stickybot]]. I have no idea what I'm doing with systemd so this setup might not be ideal or secure. But it does work. \\
Example of full stickybot.service will be at the end of this article. \\
\\
This is also on a Debian based system, I have no idea how Arch or Fedora would do this. I know it works on Ubuntu Server 20.04 and Debian 11
==== Using a Service File ====

  - Create a text file called myapp.service (in this case stickybot.service) with following content \\ <code>[Unit]
Description=appname

[Service]
ExecStart=/path/to/main.js
Restart=always
User=nobody
# Note Debian/Ubuntu uses 'nogroup', RHEL/Fedora uses 'nobody'
Group=nogroup
Environment=PATH=/usr/bin:/usr/local/bin
Environment=NODE_ENV=production
WorkingDirectory=/path/to/

[Install]
WantedBy=multi-user.target </code>
  - Copy this file to /etc/systemd/system <code> sudo cp myapp.service /etc/systemd/system </code>
  - Edit your main.js to include to contain <code> #!/usr/bin/env node </code> on the very first line
  - (Optional but recommended) Convert this file to Unix format. This should prevent incompatibles from [[https://stackoverflow.com/questions/30344858/node-script-executable-not-working-on-mac-env-node-r-no-such-file-or-directo|different carriage return behaviors between Windows and Linux]]
    - Install dos2unix <code> sudo apt install dos2unix</code>
    - Convert the file <code> sudo dos2unix /path/to/main.js </code>
  - Start your app <code> sudo systemctl start myapp.service </code>
  - See status of your app <code> sudo systemctl status myapp.service </code>
==== Stickybot example ====

<code>cat /etc/systemd/system/stickybot.service

</code>

<code>[Unit]
Description=Stickybot

[Service]
ExecStart=/etc/stickybot/src/main.js
Restart=always
User=nobody
# Note Debian/Ubuntu uses 'nogroup', RHEL/Fedora uses 'nobody'
Group=nogroup
Environment=PATH=/usr/bin:/usr/local/bin
Environment=NODE_ENV=production
WorkingDirectory=/etc/stickybot/

[Install]
WantedBy=multi-user.target

</code>

Head of main.js

<code>#!/usr/bin/env node
require('dotenv').config();

const Discord = require('discord.js');
const {Client} = Discord;
const client = new Client();
const fs = require('fs');

</code>

— //[[:laptopwiki:staff:index|dustojnikhummer]] 2022/12/31 22:10//