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+# PM2
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+
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+<https://github.com/Unitech/pm2>
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+
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+当前使用场景：产品环境守护进程。
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+
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+## 常用命令
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+
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+### 启动项目
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+
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+```bash
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+pm2 start xxx.js #直接启动入口文件
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+
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+pm2 start xxx.json #通过配置启动
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+```
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+
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+配置文件参考：
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+
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+```json
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+[{
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+ "name": "app",
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+ "script": "babel.js",
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+ "log_date_format": "YYYY-MM-DD HH:mm:ss Z",
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+ "cwd": "/home/project",
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+ "error_file": "/home/project/logs/app.err.log",
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+ "out_file": "/home/project/logs/app.out.log",
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+ "max_memory_restart": "800M",
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+ "instances": 0,
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+ "exec_mode": "cluster",
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+ "merge_logs": true,
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+ "env": {
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+ "NODE_ENV": "production"
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+ }
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+},{
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+ "script" : "./examples/child.js",
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+ "error_file" : "errLog.log",
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+ "out_file" : "outLog.log",
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+ "pid_file" : "child",
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+ "instances" : "4",
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+ "min_uptime" : "10",
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+ "max_restarts" : "4"
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+},{
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+ "script" : "examples/env.js",
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+ "error_file" : "errEcho.log",
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+ "out_file" : "outEcho.log",
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+ "name" : "ok",
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+ "pid_file" : "echo.pid",
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+ "max" : "1",
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+ "exec_mode" : "cluster_mode",
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+ "port" : "9001",
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+ "env_variable" : "TOTO",
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+ "TEST_VARIABLE" : "YESSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSIR"
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+}]
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+```
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+
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+### 重启项目
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+
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+```bash
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+pm2 restart #PID# #重启一个进程
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+
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+pm2 restart app-name #重启一个应用
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+
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+pm2 restart all #重启所有项目
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+```
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+
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+### 停止
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+
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+```bash
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+pm2 stop #PID#
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+
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+pm2 stop app-name
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+```
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+
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+### 终止
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+
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+```bash
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+pm2 delete app-name #删除一个进程
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+
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+pm2 kill #终止所有进程
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+```
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