必要性
nodejs+express 一旦err，整个进程就会挂了，所以需要一个守护进程来管理，发现挂了 自动重启~
pm2 就是一个不错的守护进程管理。
https://github.com/Unitech/pm2
安装
升级
基础命令
启动 nodejs 程序
查看所有nodejs进程
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| pm2 lsit
┌──────────┬────┬──────┬───────┬────────┬─────────┬────────┬─────┬──────────┬──────────┐
│ App name │ id │ mode │ pid │ status │ restart │ uptime │ cpu │ mem │ watching │
├──────────┼────┼──────┼───────┼────────┼─────────┼────────┼─────┼──────────┼──────────┤
│ do │ 0 │ fork │ 10854 │ online │ 0 │ 0s │ 9% │ 5.8 MB │ disabled │
└──────────┴────┴──────┴───────┴────────┴─────────┴────────┴─────┴──────────┴──────────┘
|
cpu / 内存 状态
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| pm2 monit
⌬ PM2 monitoring (To go further check o[ ] 0 %
[||||||||||||||||||||||||||| ] 87.430 MB B M2 monitoring (To go further check out https://app.keymetrics.io)
● do
[0] [fork_mode]
|
停止
重启
移除
所有命令
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| # General
$ npm install pm2 -g # Install PM2
$ pm2 start app.js # Start, Daemonize and auto-restart application (Node)
$ pm2 start app.py # Start, Daemonize and auto-restart application (Python)
$ pm2 start npm -- start # Start, Daemonize and auto-restart Node application
# Cluster Mode (Node.js only)
$ pm2 start app.js -i 4 # Start 4 instances of application in cluster mode
# it will load balance network queries to each app
$ pm2 reload all # Zero Second Downtime Reload
$ pm2 scale [app-name] 10 # Scale Cluster app to 10 process
# Process Monitoring
$ pm2 list # List all processes started with PM2
$ pm2 monit # Display memory and cpu usage of each app
$ pm2 show [app-name] # Show all informations about application
# Log management
$ pm2 logs # Display logs of all apps
$ pm2 logs [app-name] # Display logs for a specific app
$ pm2 logs --json # Logs in JSON format
$ pm2 flush
$ pm2 reloadLogs
# Process State Management
$ pm2 start app.js --name="api" # Start application and name it "api"
$ pm2 start app.js -- -a 34 # Start app and pass option "-a 34" as argument
$ pm2 start app.js --watch # Restart application on file change
$ pm2 start script.sh # Start bash script
$ pm2 start app.json # Start all applications declared in app.json
$ pm2 reset [app-name] # Reset all counters
$ pm2 stop all # Stop all apps
$ pm2 stop 0 # Stop process with id 0
$ pm2 restart all # Restart all apps
$ pm2 gracefulReload all # Graceful reload all apps in cluster mode
$ pm2 delete all # Kill and delete all apps
$ pm2 delete 0 # Delete app with id 0
# Startup/Boot management
$ pm2 startup # Detect init system, generate and configure pm2 boot on startup
$ pm2 save # Save current process list
$ pm2 resurrect # Restore previously save processes
$ pm2 unstartup # Disable and remove startup system
$ pm2 update # Save processes, kill PM2 and restore processes
$ pm2 generate # Generate a sample json configuration file
# Deployment
$ pm2 deploy app.json prod setup # Setup "prod" remote server
$ pm2 deploy app.json prod # Update "prod" remote server
$ pm2 deploy app.json prod revert 2 # Revert "prod" remote server by 2
# Module system
$ pm2 module:generate [name] # Generate sample module with name [name]
$ pm2 install pm2-logrotate # Install module (here a log rotation system)
$ pm2 uninstall pm2-logrotate # Uninstall module
$ pm2 publish # Increment version, git push and npm publish
|
视图化管理器
https://app.keymetrics.io/
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