[Bug 1425376] Re: Ubuntu Core provides no console login prompt if network is unavailable

[Martin Pitt]

As for what creates the "Before=network.target" for networking.service
(aka /etc/init.d/networking): this is defined in /etc/insserv.conf.

> We should definitely not be blocking network.target indefinitely on
boot waiting for the results of /etc/init.d/networking.

Agreed. Conceptually we should keep the Before= so that on shutdown
networking.service gets stopped after every service which provides
something on the network (and thus can shut down cleanly), but on boot
it's fine to asynchronously do the ifup in the background.

However, I cannot actually reproduce this on the current devel-proposed
image? I booted with "-net nic,model=virtio -net none" to simulate an
unconnected ethernet port, and the only "hanging" job that I get is
ifup at eth0.service (expectedly). network.target and getty are up, but
networking.service didn't even run. But it turns out this is due to bug
1440978, I'll address this first.

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Title:
  Ubuntu Core provides no console login prompt if network is unavailable

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