升级到 20.10 后启动时出现 SSSD 问题

Question

我最近升级到 Ubuntu (Gnome) 20.10，从那以后我收到了很多类似的消息

SSSD failed to start system security daemon
dependency failed for PAM security socker
... and some more dependency related info...

在启动期间。作为 Ubuntu 的初学者，我无法很好地判断这个问题有多严重。但我不希望在启动过程中出现红色标记线，这使得我想消除这个问题。我发现journalctl -b了一些与 SSSD 有关的消息（见下文）。尤其是第一条消息（红色）令人担忧：SSSD 似乎没有运行。

• 为什么升级到20.10会导致这个问题？
• 我能做些什么？我在 /etc/sssd 中没有 sssd.conf 文件，但我不确定为什么它已被删除或为什么它不存在

由于journalctl 文件大约有8000 行，我只发布表明sssd 问题开始的行。如果需要更多信息，请告诉我。

Nov 05 20:44:30 loosken sssd[1031]: SSSD couldn't load the configuration database [2]: No such file or directory.
Nov 05 20:44:30 loosken systemd[1]: sssd.service: Main process exited, code=exited, status=4/NOPERMISSION
Nov 05 20:44:30 loosken systemd[1]: sssd.service: Failed with result 'exit-code'.
Nov 05 20:44:30 loosken systemd[1]: Failed to start System Security Services Daemon.
Nov 05 20:44:30 loosken systemd[1]: Dependency failed for SSSD PAM Service responder private socket.
Nov 05 20:44:30 loosken snapd[1030]: AppArmor status: apparmor is enabled and all features are available
Nov 05 20:44:30 loosken systemd[1]: Dependency failed for SSSD PAM Service responder socket.
Nov 05 20:44:30 loosken systemd[1]: sssd-pam.socket: Job sssd-pam.socket/start failed with result 'dependency'.
Nov 05 20:44:30 loosken systemd[1]: sssd-pam-priv.socket: Job sssd-pam-priv.socket/start failed with result 'dependency'.
Nov 05 20:44:30 loosken systemd[1]: Dependency failed for SSSD NSS Service responder socket.
Nov 05 20:44:30 loosken systemd[1]: sssd-nss.socket: Job sssd-nss.socket/start failed with result 'dependency'.
Nov 05 20:44:30 loosken systemd[1]: Dependency failed for SSSD SSH Service responder socket.
Nov 05 20:44:30 loosken systemd[1]: sssd-ssh.socket: Job sssd-ssh.socket/start failed with result 'dependency'.
Nov 05 20:44:30 loosken systemd[1]: Dependency failed for SSSD Sudo Service responder socket.
Nov 05 20:44:30 loosken systemd[1]: sssd-sudo.socket: Job sssd-sudo.socket/start failed with result 'dependency'.
Nov 05 20:44:30 loosken systemd[1]: Dependency failed for SSSD AutoFS Service responder socket.
Nov 05 20:44:30 loosken systemd[1]: sssd-autofs.socket: Job sssd-autofs.socket/start failed with result 'dependency'.
Nov 05 20:44:30 loosken systemd[1]: Dependency failed for SSSD PAC Service responder socket.
Nov 05 20:44:30 loosken systemd[1]: sssd-pac.socket: Job sssd-pac.socket/start failed with result 'dependency'.
Nov 05 20:44:30 loosken dbus-daemon[995]: [system] AppArmor D-Bus mediation is enabled