Node.js中環境變量process.env怎么獲取？pm2的安裝和使用

如何獲取當前Node.js對應的process.env值

為什么是undefined。。

怎么設置

set process.env = ""

參考1：https://www.cnblogs.com/zdz8207/p/nodejs-process-env.html

nodejs pm2 json配置apps：https://www.jianshu.com/p/58197cb2de71

pm2安裝與使用（生產環境部署）：https://www.jianshu.com/p/58197cb2de71

pm2 啟動服務閃現CMD窗口：https://ask.csdn.net/questions/753104

pm2 start pm2.json和pm2 start server.js

查看error.log發現：

Error: bind EADDRINUSE null:14999
    at listenOnMasterHandle (net.js:1385:18)
    at shared (internal/cluster/child.js:126:3)
    at Worker.<anonymous> (internal/cluster/child.js:97:7)
    at process.onInternalMessage (internal/cluster/utils.js:47:8)
    at process.emit (events.js:326:22)
    at emit (internal/child_process.js:902:12)
    at processTicksAndRejections (internal/process/task_queues.js:81:21)
Error: bind EADDRINUSE null:14999
    at listenOnMasterHandle (net.js:1385:18)
    at shared (internal/cluster/child.js:126:3)
    at Worker.<anonymous> (internal/cluster/child.js:97:7)
    at process.onInternalMessage (internal/cluster/utils.js:47:8)
    at process.emit (events.js:326:22)
    at emit (internal/child_process.js:902:12)
    at processTicksAndRejections (internal/process/task_queues.js:81:21)
Error: bind EADDRINUSE null:14999
    at listenOnMasterHandle (net.js:1385:18)
    at shared (internal/cluster/child.js:126:3)
    at Worker.<anonymous> (internal/cluster/child.js:97:7)
    at process.onInternalMessage (internal/cluster/utils.js:47:8)
    at process.emit (events.js:326:22)
    at emit (internal/child_process.js:902:12)
    at processTicksAndRejections (internal/process/task_queues.js:81:21)
Error: bind EADDRINUSE null:14999
    at listenOnMasterHandle (net.js:1385:18)
    at shared (internal/cluster/child.js:126:3)
    at Worker.<anonymous> (internal/cluster/child.js:97:7)
    at process.onInternalMessage (internal/cluster/utils.js:47:8)
    at process.emit (events.js:326:22)
    at emit (internal/child_process.js:902:12)
    at processTicksAndRejections (internal/process/task_queues.js:81:21)

pm2 服務崩潰 Error: bind EADDRINUSE：https://www.cnblogs.com/williamjie/p/9473331.html

14999正在被占用？？

Error: Redis connection to 192.168.1.3:6379 failed - connect ECONNREFUSED 192.168.1.3:6379
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1146:16)
Error: Redis connection to 192.168.1.3:6379 failed - connect ECONNREFUSED 192.168.1.3:6379
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1146:16)
Error: Redis connection to 192.168.1.3:6379 failed - connect ECONNREFUSED 192.168.1.3:6379
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1146:16)
Error: Redis connection to 192.168.1.3:6379 failed - connect ECONNREFUSED 192.168.1.3:6379
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1146:16)
Error: Redis connection to 192.168.1.3:6379 failed - connect ECONNREFUSED 192.168.1.3:6379
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1146:16)

redis啟動了，但是卻一直連接失敗。。。難道是密碼？？

把192.168.1.3變成127.0.0.1就好了

然后使用postman查詢接口，報錯

You have triggered an unhandledRejection, you may have forgotten to catch a Promise rejection:
Error: connect ECONNREFUSED 127.0.0.1:5672
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1146:16)