[Buildbot] #2989: Improve a bit documentation for Docker

[Buildbot trac]

#2989: Improve a bit documentation for Docker
-------------------------+--------------------
Reporter:  sa2ajj        |       Owner:
    Type:  enhancement   |      Status:  new
Priority:  major         |   Milestone:  0.9.0
 Version:  master        |  Resolution:
Keywords:  docs, docker  |
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Comment (by dustin):

 Here's a link that addresses this issue:
 http://askubuntu.com/questions/475764/docker-io-dns-doesnt-work-its-
 trying-to-use-8-8-8-8

 I think that bug is between the org and docker -- not a Python bug.  And I
 don't think it's any more common to find an org blocking 8.8.8.8 than it
 is to find an org blocking pypi or archive.ubuntu.org or forcing all
 outgoing traffic through a proxy that modifies content.

 There's a cost in polluting documentation with every weird case someone's
 come across.  Rather than address this specific issue, let's put in a note
 that says:

 > Docker can be tricky to get working correctly.  If you're having
 trouble, first determine whether it is a Buildbot issue or a Docker issue
 by running `docker run ubuntu:12.04 apt-get update`.  If that fails, look
 for help with your Docker install.  On the other hand, if that succeeds,
 then you may have better luck getting help from members of the Buildbot
 community.

--
Ticket URL: <http://trac.buildbot.net/ticket/2989#comment:1>
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