[mythtv-users] Can't start backend on Debian 9 (Stretch)

[Ian Campbell]

On Thu, 2017-07-27 at 19:59 +0100, Ian Campbell wrote:
> 
> I would expect that even LSB compat based stuff would show up on
> systemd based systems in things like "systemctl" and "system status"
> output, and with that you should be able to find the name it has given
> the compat unit for use with journalctl (I think it's "-u <unit>" to
> inspect a particular unit, but I don't have a running systemd system to
> check on).

I found a (non-myth) systemd system. On it I have:
    $ sudo systemctl | grep LSB
      cgroupfs-mount.service                                                                                        loaded active exited    LSB: Set up cgroupfs mounts.                                                 
      cpufrequtils.service                                                                                          loaded active exited    LSB: set CPUFreq kernel parameters                                           
    ● docker.service                                                                                                loaded failed failed    LSB: Create lightweight, portable, self-sufficient containers.               

I can examine the failed service with (sudo or you don't get logs, just the info):

    $ sudo systemctl status docker.service
    ● docker.service - LSB: Create lightweight, portable, self-sufficient containers.
       Loaded: loaded (/etc/init.d/docker; generated; vendor preset: enabled)
       Active: failed (Result: exit-code) since Sun 2017-06-11 13:27:42 BST; 1 months 15 days ago
         Docs: man:systemd-sysv-generator(8)
      Process: 1501 ExecStart=/etc/init.d/docker start (code=exited, status=1/FAILURE)

Jun 11 13:27:41 dagon systemd[1]: Starting LSB: Create lightweight, portable, self-sufficient containers....
Jun 11 13:27:42 dagon docker[1501]: /usr/bin/docker not present or not executable ... failed!
Jun 11 13:27:42 dagon systemd[1]: docker.service: Control process exited, code=exited status=1
Jun 11 13:27:42 dagon systemd[1]: Failed to start LSB: Create lightweight, portable, self-sufficient containers..
Jun 11 13:27:42 dagon systemd[1]: docker.service: Unit entered failed state.
Jun 11 13:27:42 dagon systemd[1]: docker.service: Failed with result 'exit-code'.

As you can see it is using an automatically generated unit file which
is calling the LSB/sysvinit script (which is actually stale because
docker isn't installed on this machine).

I would expect you would find something similar based on
/etc/init.d/mythtv-backend on your system, and probably some sort of
error message.

Ian.