Public bug reported:
System info:
$ lsb_release -rd
Description: Ubuntu 16.04.6 LTS
Release: 16.04
$ apt-cache policy openssh-server
openssh-server:
Installed: 1:7.2p2-4ubuntu2.9
Candidate: 1:7.2p2-4ubuntu2.9
Version table:
*** 1:7.2p2-4ubuntu2.9 500
500 https://mirror.one.com/ubuntu xenial-proposed/main amd64 Packages
100 /var/lib/dpkg/status
1:7.2p2-4ubuntu2.8 500
500 https://mirror.one.com/ubuntu xenial-security/main amd64 Packages
500 https://mirror.one.com/ubuntu xenial-updates/main amd64 Packages
500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64
Packages
1:7.2p2-4 500
500 https://mirror.one.com/ubuntu xenial/main amd64 Packages
500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
- what should happen?
After regular update ssh daemon should restart successfully.
- what actually happens:
$ sudo apt-get -y update
[skip]
Fetched 2,473 B in 1s (1,702 B/s)
Reading package lists... Done
$ sudo apt-get -y dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages were automatically installed and are no longer required:
linux-headers-4.4.0-164 linux-headers-4.4.0-164-generic
linux-image-4.4.0-164-generic linux-modules-4.4.0-164-generic
linux-modules-extra-4.4.0-164-generic
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up openssh-server (1:7.2p2-4ubuntu2.9) ...
Job for ssh.service failed because a timeout was exceeded. See "systemctl
status ssh.service" and "journalctl -xe" for details.
invoke-rc.d: initscript ssh, action "restart" failed.
● ssh.service - OpenBSD Secure Shell server
Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset:
enabled)
Active: activating (auto-restart) (Result: timeout) since Thu 2020-04-23
17:21:42 MSK; 3ms ago
Process: 9000 ExecStart=/usr/sbin/sshd -D $SSHD_OPTS (code=exited,
status=0/SUCCESS)
Process: 8996 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
Main PID: 9000 (code=exited, status=0/SUCCESS)
Apr 23 17:21:42 asrockZ97e systemd[1]: Failed to start OpenBSD Secure Shell
server.
Apr 23 17:21:42 asrockZ97e systemd[1]: ssh.service: Unit entered failed state.
Apr 23 17:21:42 asrockZ97e systemd[1]: ssh.service: Failed with result
'timeout'.
dpkg: error processing package openssh-server (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
openssh-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
However, if I check manually then everything seems fine:
$ ps aux | grep sshd | grep -v grep
root 9481 0.0 0.0 26212 3728 ? Ss 17:23 0:00
/usr/sbin/sshd -D
$ sudo systemctl status sshd.service
● ssh.service - OpenBSD Secure Shell server
Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset:
enabled)
Active: activating (start) since Thu 2020-04-23 17:29:15 MSK; 1min 19s ago
Process: 10454 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
Main PID: 10457 (sshd)
CGroup: /system.slice/ssh.service
├─ 9759 sshd: ia [priv]
├─ 9771 sshd: ia@pts/18
├─ 9772 -zsh
├─10457 /usr/sbin/sshd -D
├─10750 sudo systemctl status sshd.service
└─10760 systemctl status sshd.service
Apr 23 17:29:15 asrockZ97e systemd[1]: Starting OpenBSD Secure Shell server...
Apr 23 17:29:15 asrockZ97e sshd[10457]: Set /proc/self/oom_score_adj from 0 to
-1000
Apr 23 17:29:15 asrockZ97e sshd[10457]: Server listening on 0.0.0.0 port 22.
Apr 23 17:29:15 asrockZ97e sshd[10457]: Server listening on :: port 22.
Apr 23 17:30:34 asrockZ97e sudo[10750]: ia : TTY=pts/18 ; PWD=/home/ia ;
USER=root ; COMMAND=/bin/systemctl status sshd.service
Apr 23 17:30:34 asrockZ97e sudo[10750]: pam_unix(sudo:session): session opened
for user root by ia(uid=0)
$ ssh localhost
Last login: Thu Apr 23 17:01:34 2020
$
After some google fu, I found some recommendations about removing `-D' from
`ExecStart' and replacing `Type=notify' by `Type=forking' in
`/etc/systemd/system/sshd.service' but I'm not sure how accurate those hints
are and what the real root cause behind such sudden and unexpected change in
behavior.
P.S. I do realize that I use the package from `proposed' repo but I
don't think that it's the excuse for a such strange behavior after
upgrade.
** Affects: openssh (Ubuntu)
Importance: Undecided
Status: New
** Tags: openssh-server sshd status systemd timeout
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1874455
Title:
ssh daemon doesn't report successful start state to systemd after
upgrade to 1:7.2p2-4ubuntu2.9
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