node 安装 pm2

1. pm2 安装
   npm install pm2 -g

2. pm2 的配置文件

module.exports = {
  apps: [
    {
      name: "lunbuka-m-h5", // 这个name就是pm2启动时需要的name
      exec_mode: "cluster",
      instances: "max", // Or a number of instances
      script: "./node_modules/nuxt/bin/nuxt.js",
      args: "start --mode prod",
      out_file: "/data/pm2/logs/lunbuka-m-h5_out.log",
      error_file: "/data/pm2/logs/lunbuka-m-h5_error.log",
      combine_logs: true,
      merge_logs: true,
      cwd: "/data/web/kalunbu-m-h5", // absolute path to nuxt dir
      max_memory_restart: "512M" // in case nuxt renderer eats all memory, it will be restarted
    }
  ]
};

配置文件更改后，需要 kill pm2， 重新启动才能生效

3. 日志文件分割
   pm2 install pm2-logrotate

   常用命令
   pm2 set pm2-logrotate:max_size 10K
   pm2 set pm2-logrotate:retain 30
   pm2 set pm2-logrotate:compress false
   pm2 set pm2-logrotate:dateFormat YYYY-MM-DD_HH-mm-ss
   pm2 set pm2-logrotate:workerInterval 30
   pm2 set pm2-logrotate:rotateInterval 0 0 * * *
   pm2 set pm2-logrotate:rotateModule true

4. pm2 常用命令

# Fork mode
pm2 start app.js --name my-api # Name process

# Cluster mode
pm2 start app.js -i 0        # Will start maximum processes with LB depending on available CPUs
pm2 start app.js -i max      # Same as above, but deprecated.
pm2 scale app +3             # Scales `app` up by 3 workers
pm2 scale app 2              # Scales `app` up or down to 2 workers total

# Listing

pm2 list               # Display all processes status
pm2 jlist              # Print process list in raw JSON
pm2 prettylist         # Print process list in beautified JSON

pm2 describe 0         # Display all informations about a specific process

pm2 monit              # Monitor all processes

# Logs

pm2 logs [--raw]       # Display all processes logs in streaming
pm2 flush              # Empty all log files
pm2 reloadLogs         # Reload all logs

# Actions

pm2 stop all           # Stop all processes
pm2 restart all        # Restart all processes

pm2 reload all         # Will 0s downtime reload (for NETWORKED apps)

pm2 stop 0             # Stop specific process id
pm2 restart 0          # Restart specific process id

pm2 delete 0           # Will remove process from pm2 list
pm2 delete all         # Will remove all processes from pm2 list

# Misc

pm2 reset <process>    # Reset meta data (restarted time...)
pm2 updatePM2          # Update in memory pm2
pm2 ping               # Ensure pm2 daemon has been launched
pm2 sendSignal SIGUSR2 my-app # Send system signal to script
pm2 start app.js --no-daemon
pm2 start app.js --no-vizion
pm2 start app.js --no-autorestart

参考：https://pm2.keymetrics.io/docs/usage/quick-start/