Ubuntu 18.04.1 下的 Systemd 失败并显示“无法创建 /user.slice/......service/init.scope 控制组：权限被拒绝”

Question

在我的 Ubuntu 18.04.1 系统上，systemd 的用户管理器无法启动。我认为这是我当前遇到的其他问题的根本原因。有什么想法可以摆脱这个吗？

\n\n

系统版本

\n\n

$ systemd --version\nsystemd 237\n+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hierarchy=hybrid\n

\n\n

Ubuntu 18.04.1 LTS 版本

\n\n

$ uname -a\nLinux example.com 4.15.0 #1 SMP Wed Jul 25 19:09:31 MSK 2018 x86_64 x86_64 x86_64 GNU/Linux\n

\n\n

systemctl 单元状态

\n\n

 $ sudo systemctl status user@1001.service\n\xe2\x97\x8f user@1001.service - User Manager for UID 1001\n   Loaded: loaded (/lib/systemd/system/user@.service; static; vendor preset: enabled)\n  Drop-In: /lib/systemd/system/user@.service.d\n           \xe2\x94\x94\xe2\x94\x80timeout.conf\n   Active: failed (Result: protocol) since Tue 2019-01-08 10:33:08 CET; 1min 42s ago\n  Process: 315 ExecStart=/lib/systemd/systemd --user (code=exited, status=1/FAILURE)\n Main PID: 315 (code=exited, status=1/FAILURE)\n\nJan 08 10:33:08 example.com systemd[1]: Starting User Manager for UID 1001...\nJan 08 10:33:08 example.com systemd[315]: pam_unix(systemd-user:session): session opened for user mischa by (uid=0)\nJan 08 10:33:08 example.com systemd[1]: user@1001.service: Failed with result 'protocol'.\nJan 08 10:33:08 example.com systemd[1]: Failed to start User Manager for UID 1001.\n

\n\n

系统日志说

\n\n

Jan  8 10:33:08 example.com systemd[1]: Starting User Manager for UID 1001...\nJan  8 10:33:08 example.com systemd[315]: Failed to create /user.slice/user-1001.slice/user@1001.service/init.scope control group: Permission denied\nJan  8 10:33:08 example.com systemd[315]: Failed to allocate manager object: Permission denied\nJan  8 10:33:08 example.com systemd[1]: user@1001.service: Failed with result 'protocol'.\nJan  8 10:33:08 example.com systemd[1]: Failed to start User Manager for UID 1001.\n

\n\n

我的用户服务单位文件

\n\n

$ cat /lib/systemd/system/user@.service\n#  SPDX-License-Identifier: LGPL-2.1+\n#\n#  This file is part of systemd.\n#\n#  systemd is free software; you can redistribute it and/or modify it\n#  under the terms of the GNU Lesser General Public License as published by\n#  the Free Software Foundation; either version 2.1 of the License, or\n#  (at your option) any later version.\n\n[Unit]\nDescription=User Manager for UID %i\nAfter=systemd-user-sessions.service\n\n[Service]\nUser=%i\nPAMName=systemd-user\nType=notify\nExecStart=-/lib/systemd/systemd --user\nSlice=user-%i.slice\nKillMode=mixed\nDelegate=pids cpu\nTasksMax=infinity\nTimeoutStopSec=120s\n

\n

Answer 1

升级 Ubuntu 后，我发生了这种情况...您可能需要检查以下目录链中的权限。

/sys/fs/cgroup/systemd/user.slice/user-1000.slice/

因此，您需要确保其他人具有读取和执行权限，以便您的用户可以创建该目录。对我来说，升级一定没有为/sys/fs/cgroup/systemd/设置正确的权限 ，所以我执行了以下操作：

chmod o+rx /sys/fs/cgroup/systemd/