我正在嘗試為一個簡單的反應應用程式設定 systemd 服務。該應用程式託管在 /home/myuser/test 中。 npm 和 node 都在 PATH 中並硬連結到 /usr/bin。所有檔案都具有 myuser:myuser 使用者和群組的權限。如果我手動啟動它，npm start它會正確啟動並從以下位置提供應用程式http://localhost:3000
Compiled successfully!
You can now view test in the browser.
Local: http://localhost:3000
On Your Network: http://myipaddress:3000
Note that the development build is not optimized.
To create a production build, use npm run build.
如果我嘗試透過 systemd 啟動應用程序，它會失敗，但沒有說明原因。我使用相同的使用者從相同的路徑啟動它，並嘗試了 ExecStart 可以想像的所有組合：
ExecStart=npm start
ExecStart=/usr/bin/npm start
ExecStart=/usr/bin/node /home/myuser/test/node_modules/react-scripts/scripts/start.js
它們都產生相同的結果，即它「開始」正常，不久之後就失敗了，在journalctl中顯然沒有任何原因：
$sudo systemctl status node-client
● node-client.service - Node-React Frontend Server
Loaded: loaded (/etc/systemd/system/node-client.service; disabled; vendor preset: disabled)
Active: active (running) since Wed 2020-04-08 09:46:10 UTC; 679ms ago
Main PID: 18165 (node)
CGroup: /system.slice/node-client.service
└─18165 /usr/bin/node /home/myuser/test/node_modules/react-scripts/scripts/start.js
Apr 08 09:46:10 hostname systemd[1]: Started Node-React Frontend Server.
Apr 08 09:46:10 hostname systemd[1]: Starting Node-React Frontend Server...
幾秒鐘後...
$sudo systemctl status node-client
● node-client.service - Node-React Frontend Server
Loaded: loaded (/etc/systemd/system/node-client.service; disabled; vendor preset: disabled)
Active: activating (auto-restart) since Wed 2020-04-08 09:46:00 UTC; 3s ago
Process: 18142 ExecStart=/usr/bin/node /home/ec2-user/test/node_modules/react-scripts/scripts/start.js (code=exited, status=0/SUCCESS)
Main PID: 18142 (code=exited, status=0/SUCCESS)
我不斷在journalctl上收到以下訊息
-- Logs begin at Tue 2020-03-17 15:04:59 UTC, end at Wed 2020-04-08 09:48:23 UTC. --
Apr 08 09:48:22 hostname systemd[1]: Starting Node-React Frontend Server...
Apr 08 09:48:22 hostname systemd[1]: Started Node-React Frontend Server.
Apr 08 09:48:22 hostname systemd[1]: node-client.service holdoff time over, scheduling restart.
Apr 08 09:48:12 hostname nodeclient[18390]: Starting the development server...
Apr 08 09:48:12 hostname nodeclient[18390]: ℹ ｢wds｣: 404s will fallback to /
Apr 08 09:48:12 hostname nodeclient[18390]: ℹ ｢wds｣: Content not from webpack is served from /home/myuser/test/public
Apr 08 09:48:12 hostname nodeclient[18390]: ℹ ｢wds｣: webpack output is served from
Apr 08 09:48:12 hostname nodeclient[18390]: ℹ ｢wds｣: Project is running at http://myipaddress/
Apr 08 09:48:10 hostname systemd[1]: Starting Node-React Frontend Server...
Apr 08 09:48:10 hostname systemd[1]: Started Node-React Frontend Server.
Apr 08 09:48:10 hostname systemd[1]: node-client.service holdoff time over, scheduling restart.
Apr 08 09:48:00 hostname nodeclient[18368]: Starting the development server...
Apr 08 09:48:00 hostname nodeclient[18368]: ℹ ｢wds｣: 404s will fallback to /
Apr 08 09:48:00 hostname nodeclient[18368]: ℹ ｢wds｣: Content not from webpack is served from /home/myuser/test/public
Apr 08 09:48:00 hostname nodeclient[18368]: ℹ ｢wds｣: webpack output is served from
Apr 08 09:48:00 hosntame nodeclient[18368]: ℹ ｢wds｣: Project is running at http://myipaddress/
systemd 服務文件隨著時間的推移而變化，但無論 ExecStart 和其他變更如何，錯誤都是相同的，這就是目前的內容：
[Unit]
Description=Node-React Frontend Server
After=syslog.target network.target
[Service]
ExecStart=/usr/bin/node node_modules/react-scripts/scripts/start.js
Restart=always
RestartSec=10s
TimeoutSec=900
User=myuser
Group=myuser
Environment=PATH=/usr/bin:/usr/local/bin
WorkingDirectory=/home/myuser/test/
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=nodeclient
[Install]
WantedBy=multi-user.target
作業系統是Centos7。所有測試都是使用同一用戶完成的，沒有 sudo，手動和透過 systemd 執行相同的命令。手動啟動有效，systemd 無效。
最後，要提一下，我透過 systemd 有 Express-NodeJS 應用程序，並且它使用相同的 systemd 配置正確啟動。它只對 React 失敗。
任何幫助將不勝感激！
謝謝
尼西
答案1
嘗試添加StandardInput=tty-force到您的[Service]部分