npm install pm2 -g
pm2 update
附pm2命令：
$ npm install pm2 -g # 命令行安装 pm2
$ pm2 start app.js -i 4 # 后台运行pm2，启动4个app.js
# 也可以把‘max‘ 参数传递给 start
# 正确的进程数目依赖于Cpu的核心数目
$ pm2 start app.js --name my-api # 命名进程
$ pm2 list # 显示所有进程状态
$ pm2 monit # 监视所有进程
$ pm2 logs # 显示所有进程日志
$ pm2 stop all # 停止所有进程
$ pm2 restart all # 重启所有进程
$ pm2 reload all # 0 秒停机重载进程 (用于 NETWORKED 进程)
$ pm2 stop 0 # 停止指定的进程
$ pm2 restart 0 # 重启指定的进程
$ pm2 startup # 产生 init 脚本 保持进程活着
$ pm2 web # 运行健壮的 computer API endpoint (http://localhost:9615)
$ pm2 delete 0 # 杀死指定的进程
$ pm2 delete all # 杀死全部进程
The simplest way to start, daemonize and monitor your application is by using this command line:
$ pm2 start app.js
Or start any other application easily:
$ pm2 start bashscript.sh
$ pm2 start python-app.py --watch
$ pm2 start binary-file -- --port 1520
Some options you can pass to the CLI:
# Specify an app name
--name <app_name>
# Watch and Restart app when files change
--watch
# Set memory threshold for app reload
--max-memory-restart <200MB>
# Specify log file
--log <log_path>
# Pass extra arguments to the script
-- arg1 arg2 arg3
# Delay between automatic restarts
--restart-delay <delay in ms>
# Prefix logs with time
--time
# Do not auto restart app
--no-autorestart
# Specify cron for forced restart
--cron <cron_pattern>
# Attach to application log
--no-daemon $ pm2 restart app_name
$ pm2 reload app_name
$ pm2 stop app_name
$ pm2 delete app_name
Restart application on changes
It’s pretty easy with the --watch option:
$ cd /path/to/my/app
$ pm2 start env.js --watch --ignore-watch="node_modules"
参考：https://pm2.keymetrics.io/docs/usage/quick-start/