無法在 Centos 7 上啟動 httpd 服務“GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: 無法確定主題的用戶”

Question

嘗試（重新）啟動 httpd 服務時出現以下錯誤：

** (pkttyagent:2574): WARNING **: 01:33:55.345: Unable to register authentication agent:
GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject Error registering authentication agent:
GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject (polkit-error-quark, 0) Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.

然后

systemctl status httpd.service

沒有說明問題：

httpd.service - Web server Apache
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Wed 2020-07-22 01:33:55 BST; 26min ago
  Process: 2578 ExecStart=/usr/local/apache/bin/apachectl start (code=exited, status=1/FAILURE)

Jul 22 01:33:55 server... systemd[1]: Starting Web server Apache...
Jul 22 01:33:55 server... systemd[1]: httpd.service: control process exited, code=exited status=1
Jul 22 01:33:55 server... systemd[1]: Failed to start Web server Apache.
Jul 22 01:33:55 server... systemd[1]: Unit httpd.service entered failed state.
Jul 22 01:33:55 server... systemd[1]: httpd.service failed.

這可能是什么原因造成的？ 我應該在哪里調試？

Answer 1

[Thu Jul 23 05:40:44.885963 2020] [ssl:emerg] [pid 2877:tid 140514669713280] AH02565：證書和私鑰不匹配

看起來密鑰和證書不匹配。 請檢查密鑰和證書文件的 md5。

Answer 2

這通常發生在嘗試重新啟動 systemd 服務時。

解決方法如下：

以 root 身份運行

groupadd -g 23 nohidproc

usermod -a -G nohidproc polkitd

mount -o remount,rw,hidepid=2,gid=nohidproc /proc

systemctl 重啟 polkit