nodejs pm2 应用指南

Posted 2022-10-19

1.安装配置

pm2是一个带有负载均衡功能的应用进程管理器，类似有Supervisor，forever，详细参数见官网：​​http://pm2.keymetrics.io​​

1、安装 nodejs 和 pm2

curl -sL https://rpm.nodesource.com/setup_8.x | bash - wget https://nodejs.org/dist/latest-v12.x/node-v12.22.8-linux-x64.tar.gz tar zxvf node-v12.22.8-linux-x64.tar.gz mv node-v12.22.8-linux-x64 /usr/local/node ln -sv /usr/local/node/bin/node /usr/local/bin/node ln -sv /usr/local/node/bin/npm /usr/local/bin/npm npm config set registry https://registry.npm.taobao.org yum install -y nodejs npm install pm2@latest -g

2.常用指令

2.1.启动

pm2 start app.js pm2 start app.js --name my-api #my-api为PM2进程名称 pm2 start app.js -i 0 #根据CPU核数启动进程个数 pm2 start app.js --watch #实时监控app.js的方式启动，当app.js文件有变动时，pm2会自动reload

2.2.查看进程

pm2 list pm2 show 0 或者 # pm2 info 0 #查看进程详细信息，0为PM2进程id

2.3.监控

pm2 monit

2.4.停止

pm2 stop all pm2 stop 0

2.5.重新加载

pm2 reload all pm2 reload 0

2.6.重启

pm2 restart all pm2 restart 0

2.7.删除

pm2 delete 0 pm2 delete all

2.8.日志操作

pm2 logs [–raw] pm2 flush pm2 reloadlogs

2.9.升级版本

npm install pm2@lastest -g pm2 updatePM2

3.自启动

sudo -u postgres pm2 start app.js --name konga sudo -u postgres pm2 startup sudo -u postgres pm2 save

4.启动和管理 jar

4.1.配置文件编写

vim datax-admin.json

"apps" : "name":"datax-admin", "script":"java", "args":[ "-Xmx1024M", "-Xms1024M", "-Xmn448M", "-XX:MaxMetaspaceSize=192M", "-XX:MetaspaceSize=192M", "-jar", "datax-admin-2.1.1.jar", ], "error_file":"./log/datax-admin-err.log", "out_file":"./log/datax-admin-out.log", "merge_logs":true, "log_date_format":"YYYY/MM/DD HH:mm:ss", "min_uptime": "60s", "max_restarts": 30, "autorestart": true, "restart_delay": "60"

4.2.带变量的配置文件

node build/app.js server --port=8081 /usr/bin/nohup /usr/local/node/bin/node /var/lib/grafana/plugins/grafana-image-renderer/build/app.js server --port=8081 &

"apps" : "name":"image-renderer", "script":"node", "args":[ "/var/lib/grafana/plugins/grafana-image-renderer/build/app.js", "server", "--port=8081", ], "error_file":"/tmp/image-renereer-err.log", "merge_logs":true, "log_date_format":"YYYY/MM/DD HH:mm:ss", "min_uptime": "60s", "max_restarts": 30, "autorestart": true, "restart_delay": "60"

4.3.启动

pm2 start datax-admin.json