Andy Kurth created VCL-992:
------------------------------
Summary: ext_sshd service occasionally fails to restart under
systemd
Key: VCL-992
URL: https://issues.apache.org/jira/browse/VCL-992
Project: VCL
Issue Type: Bug
Reporter: Andy Kurth
Fix For: 2.5
I have seen the ext_sshd service fail to start/restart when controlled by
systemd on Ubuntu 16. When this occurs, the status of the service shows:
{noformat}
root@<hostname>:/etc/ssh# service ext_sshd status
* ext_sshd.service - OpenBSD Secure Shell server
Loaded: loaded (/lib/systemd/system/ext_sshd.service; enabled; vendor
preset: enabled)
Active: inactive (dead) since Wed 2016-09-21 16:37:56 EDT; 17h ago
Process: 5515 ExecStart=/usr/sbin/sshd -D -f /etc/ssh/external_sshd_config
(code=exited, status=0/SUCCESS)
Main PID: 5515 (code=exited, status=0/SUCCESS)
Sep 21 16:37:56 <hostname> systemd[1]: Starting OpenBSD Secure Shell server...
Sep 21 16:37:56 <hostname> sshd[5515]: Server listening on <IP address> port 22.
Sep 21 16:37:56 <hostname> systemd[1]: Started OpenBSD Secure Shell server.
Sep 21 16:37:56 <hostname> systemd[1]: Stopping OpenBSD Secure Shell server...
Sep 21 16:37:56 <hostname> systemd[1]: Stopped OpenBSD Secure Shell server.
Sep 21 16:37:56 <hostname> systemd[1]: ext_sshd.service: Start request repeated
too quickly.
Sep 21 16:37:56 <hostname> systemd[1]: Failed to start OpenBSD Secure Shell
server.
Sep 21 16:37:56 <hostname> systemd[1]: Stopped OpenBSD Secure Shell server.
Sep 21 16:37:56 <hostname> systemd[1]: ext_sshd.service: Start request repeated
too quickly.
Sep 21 16:37:56 <hostname> systemd[1]: Failed to start OpenBSD Secure Shell
server.
{noformat}
Users cannot connect:
{noformat}ssh: connect to host <IP address> port 22: Connection
refused{noformat}
Adding these lines under the *\[Service\]* section in
*/lib/systemd/system/ext_sshd.service* may prevent this from occurring:
{noformat}
Restart=on-failure
RestartSec=3s
{noformat}
I don't know for sure if this alone will fix the problem. There may be
additional options that could be added to the file. (_man systemd.service_)
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