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

[Serge Hallyn]

Thanks, the patch looks good.  A new package was pushed to precise-
proposed today, so it should sit for 6 days.  I'll test this one over
the next few days and upload it soon.

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

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

Status in “lxc” package in Ubuntu:
  Triaged
Status in “lxc” source package in Precise:
  New
Status in “lxc” source package in Quantal:
  Triaged

Bug description:
  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.

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