[Bug 994752] [NEW] lxc-start-ephemeral's use of dhcp lease table is fragile

[Gary Poster]

Public bug reported:

When lxc-start-ephemeral is given a command to run (-- do_something) it
wants to use lxc-attach to run the command, but lxc-attach is not ready
yet.  Instead, it parses the dhcp leases to figure out the IP for the
container, and then tries to use ssh to run the command.

Twice today in tests involving lxc-start-ephemeral, the dhcp leases were
unavailable and lxc-start-ephemeral failed.  The machine was under
fairly heavy load and was virtualized (EC2).

I'd like to try and make this less fragile.  As discussed on IRC, using
lxcip
(http://bazaar.launchpad.net/~launchpad/lpsetup/trunk/files/head:/lplxcip/)
should make this more reliable.  Perhaps increasing the timeout in that
code might be useful as well.

** Affects: lxc (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/994752

Title:
  lxc-start-ephemeral's use of dhcp lease table is fragile

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