解决centos ssh登录缓慢问题

post by rocdk890 / 2017-4-27 13:59 Thursday linux技术

最近在阿里云上新建了个系统镜像,但建了之后居然出现ssh连接缓慢的问题,看了配置文件里的UseDNS和GSSAPIAuthentication这2个参数都是no,还是连接ssh缓慢,使用ssh -v root@ip也没有找到问题,最后查看系统日志/var/log/messages发现下面错误:

Apr 27 11:36:58 qx120 dbus[10109]: [system] Activating via systemd: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service'
Apr 27 11:36:58 qx120 dbus-daemon: dbus[10109]: [system] Activating via systemd: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service'
Apr 27 11:37:23 qx120 dbus[10109]: [system] Failed to activate service 'org.freedesktop.login1': timed out
Apr 27 11:37:23 qx120 dbus-daemon: dbus[10109]: [system] Failed to activate service 'org.freedesktop.login1': timed out
Apr 27 11:39:17 qx120 dbus[10109]: [system] Activating via systemd: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service'
Apr 27 11:39:17 qx120 dbus-daemon: dbus[10109]: [system] Activating via systemd: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service'
Apr 27 11:39:42 qx120 dbus[10109]: [system] Failed to activate service 'org.freedesktop.login1': timed out
Apr 27 11:39:42 qx120 dbus-daemon: dbus[10109]: [system] Failed to activate service 'org.freedesktop.login1': timed out
Apr 27 11:40:01 qx120 dbus[10109]: [system] Activating via systemd: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service'
Apr 27 11:40:01 qx120 dbus-daemon: dbus[10109]: [system] Activating via systemd: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service'
Apr 27 11:40:26 qx120 dbus[10109]: [system] Failed to activate service 'org.freedesktop.login1': timed out
Apr 27 11:40:26 qx120 dbus-daemon: dbus[10109]: [system] Failed to activate service 'org.freedesktop.login1': timed out

网上搜了下,说systemctl status systemd-logind (centos6使用service systemd-logind status) 查看systemd-logind状态,如下图

解决办法:

systemctl restart systemd-logind

centos6使用:

service systemd-logind restart

重启好了systemd-logind服务后,再次重新连接ssh,发现问题解决.

ps:

https://serverfault.com/questions/707377/slow-ssh-login-activation-of-org-freedesktop-login1-timed-out

https://major.io/2015/07/27/very-slow-ssh-logins-on-fedora-22/

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