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Systemd - 路徑不是絕對的 - 無法執行

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Systemd - 路徑不是絕對的 - 無法執行

我正在使用Linux。我可以存取我的用戶的根目錄。

root@marais:~# pwd
/root

在這個目錄中我有以下內容：

root@marais:~# ls
example.log  log_watcher.service  log_watcher.sh

log_watcher.service

[Install]
WantedBy=multi-user.target

[Unit]
Description=Log Watcher Service

[Service]
ExecStart=log_watcher.sh

日誌觀察者.sh

# File to output to
ErrorLogFile="./error.log"
# File to read from
ExampleLogFile="./example.log"


if [ ! -e "$ErrorLogFile" ]; then   # check if file exists
    echo "Creating error file $ErrorLogFile"
    touch $ErrorLogFile
fi

echo "copying error messages from $ExampleLogFile to $ErrorLogFile"
# copy from one file to the other
 ### Challenge 1 ###
# grep ERROR $ExampleLogFile > $ErrorLogFile 
 ### Challenge 2 ###
# tail -f $ExampleLogFile | grep --line-buffered  ERROR | tee $ErrorLogFile 
while :; do grep ERROR $ExampleLogFile > $ErrorLogFile; sleep 2; done

echo "done"

我運行以下命令：

systemctl enable log_watcher

這似乎工作成功，因為我已經發送訊息說它設定了符號連結。

現在，當我嘗試啟動服務時：

systemctl start log_watcher

似乎什麼也沒發生，就是log_watcher.sh沒有被呼叫。

所以當我得到狀態時：

systemctl status log_watcher

它說 不是log_watcher.sh用絕對路徑呼叫的。

root@marais:~# systemctl status log_watcher
● log_watcher.service - Log Watcher Service
   Loaded: error (Reason: Invalid argument)
   Active: failed (Result: exit-code) since Fri 2019-10-18 10:49:32 CEST; 9min ago
 Main PID: 2850 (code=exited, status=203/EXEC)

Oct 18 10:49:32 marais systemd[1]: Started Log Watcher Service.
Oct 18 10:49:32 marais systemd[1]: log_watcher.service: Main process exited, code=exited, status=203/EXEC
Oct 18 10:49:32 marais systemd[1]: log_watcher.service: Unit entered failed state.
Oct 18 10:49:32 marais systemd[1]: log_watcher.service: Failed with result 'exit-code'.
Oct 18 10:50:12 marais systemd[1]: [/root/log_watcher.service:8] Executable path is not absolute, ignoring: log_watcher.sh
Oct 18 10:50:12 marais systemd[1]: log_watcher.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
Warning: log_watcher.service changed on disk. Run 'systemctl daemon-reload' to reload units.

當我跑步時：

root@marais:~# readlink -f log_watcher.sh
/root/log_watcher.sh

它顯示我的絕對路徑是/root/，這是我在中定義的路徑log_watcher.service：

ExecStart=/root/log_watcher.sh

問題

請您告訴我如何讓該服務啟動並執行log_watcher.sh.

謝謝

答案1

在 .service 檔案中，我需要/bin/bash在腳本的路徑之前新增。

例如，對於 backup.service：

ExecStart=/bin/bash /root/log_watcher.sh

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