[Bug 1549473] Re: ssh will not start at boot: systemctl status ssh -> output is listed as failed 255.

[Robie Basak]

> Robie: If the service offers a mechanism to set a specific NIC to
listen on, then the service should make good on that offer when it's
requested. Doesn't that make sense to you?

Correct. If you configure the service to listen on a specific NIC, you
should also configure the service to wait for that NIC to be up before
it attempts to start.

> All services that require a NIC to function should wait for that NIC
to come alive. Having a service start or attempt to start before what it
needs for life support is available makes no sense.

So don't configure it like that.

> Allowing a service to start on a bogus IP address provides no
"service". What's the point of having a service technically up if it's
deaf to traffic?

What you're asking for is the system to algorithmically detect when it
has been configured this way and defer starting of the service. This
isn't a feature that currently exists. The workaround is to adjust
service dependencies at the same time as you change your service
configuration to add that dependency.

This problem is more complex than you might think. See
https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/ for
some background.

> I can't see where this qualifies as a wishlist item. The service
advertises a feature and doesn't provide it. To me, that's a bug.

Which service? This problem crosses an integration point: the upstream
sshd daemon versus the service manager.

In any case, arguing about whether it is a bug or a feature doesn't
change anything. If you'd like to see this fixed properly, please
volunteer your time upstream to implement the proposed solution.

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https://bugs.launchpad.net/bugs/1549473

Title:
  ssh will not start at boot:  systemctl status ssh -> output is listed
  as failed 255.

Status in portable OpenSSH:
  New
Status in openssh package in Ubuntu:
  Confirmed
Status in openssh package in Debian:
  New

Bug description:
  Using apt I have reinstalled and purged both ssh and openssh-server. 
  apt-get remove --purge ssh openssh-server
  reinstalled
  updated
  and on boot the ctl status is failed 255

  After much forum research and attempts to default solutions, the final word was that reinstall usually fixes this issue. 
  With the issue usually stemming from ssh service trying to start before network services are available.

  Currently I have no logs available with 
  journalctl -u sshd | tail -100

  I can provide info pertaining to this on request.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: ssh 1:6.9p1-2ubuntu0.1
  ProcVersionSignature: Ubuntu 4.2.0-30.35-generic 4.2.8-ckt3
  Uname: Linux 4.2.0-30-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CurrentDesktop: LXDE
  Date: Wed Feb 24 14:27:55 2016
  InstallationDate: Installed on 2016-02-09 (15 days ago)
  InstallationMedia: Lubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  PackageArchitecture: all
  SourcePackage: openssh
  UpgradeStatus: No upgrade log present (probably fresh install)

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