Startup Script

PM2 can generate startup scripts and configure them in order to keep your process list intact across expected or unexpected machine restarts.

Make sure you upgrade to PM2 > 2.2.x

Init systems supported

  • systemd: Ubuntu >= 16, CentOS >= 7, Arch, Debian >= 7
  • upstart: Ubuntu <= 14
  • launchd: Darwin, MacOSx
  • openrc: Gentoo Linux, Arch Linux
  • rcd: FreeBSD
  • systemv: Centos 6, Amazon Linux

Command

To get the automatically-configured startup script for your machine you need to type this command:

# Detect available init system, generate configuration and enable startup system
$ pm2 startup

You can specify the platform you use by yourself if you want to (where platform can be either one of the cited above):

$ pm2 startup [ubuntu | ubuntu14 | ubuntu12 | centos | centos6 | arch | oracle | amazon | macos | darwin | freesd | systemd | systemv | upstart | launchd | rcd | openrc]

The output of this command can be a recommendation of the line to copy/paste with all environment variables and options configured for you.

Example:

[PM2] You have to run this command as root. Execute the following command:
      sudo su -c "env PATH=$PATH:/home/unitech/.nvm/versions/node/v4.3/bin pm2 startup <distribution> -u <user> --hp <home-path>

You simply have to copy/paste the line PM2 give you and the startup script will be configured for your OS.

NOTE : When updating nodejs, the pm2 binary path might change (it will necessarily change if you are using nvm). Therefore, we would advise you to run the startup command after any update.

Saving current processes

Once you started all the applications you want to manage, you can save the list across expected/unexpected server restart by typing this command:

$ pm2 save

It will save the process list with the corresponding environments into the dump file $PM2_HOME/.pm2/dump.pm2.

Manually resurrect processes

This brings back previously saved processes (via pm2 save):

$ pm2 resurrect

Disabling startup system

$ pm2 unstartup

The previous line code let PM2 detect your platform. Alternatively you can use another specified init system youself using:

$ pm2 unstartup [ubuntu | ubuntu14 | ubuntu12 | centos | centos6 | arch | oracle | amazon | macos | darwin | freesd | systemd | systemv | upstart | launchd | rcd | openrc] 

User permissions

Let’s say you want the startup script to be executed under another user.

Just use the -u <username> option and the --hp <user_home>:

$ pm2 startup ubuntu -u www --hp /home/ubuntu

Windows consideration

There are some external libraries to generate a Windows compatible startup script, please checkout pm2-windows-service or pm2-windows-startup.