[ubuntu-cloud] [ACTION REQUIRED]: upgrade cloud-init, use new AMI, or change apt config manually

Ben Howard ben.howard at canonical.com
Wed Apr 4 21:58:28 UTC 2012


As mentioned earlier [1,2], and in an effort to improve on reliability
of the Ubuntu archive mirrors for EC2 instances, Canonical is replacing
the existing EC2 archive mirrors with mirrors backed by Amazon S3. This
change itself will be done via modification of DNS entries and will be
transparent to users.

However, due to a bug in the http pipelining implementation in S3 [3],
a change to apt configuration needs to be made to avoid download errors.
We have chosen to deliver this change via a package upgrade in cloud-init.

The *action required* is one of the following:
a.) upgrade cloud-init:
    $ sudo apt-get update ; sudo apt-get install -y cloud-init
b.) launch official AMI's released after 2012-04-01, which will
    have the fix included. Please see
    http://cloud-images.ubuntu.com/release for the latest AMI's.
    Additionally, the Amazon EC2 Quickstart has been updated with
    the latest AMI's. At this time we are still in the process of
    updating AMIs for Ubuntu 8.04 LTS and Ubuntu 10.10[4].
    Announcements will be sent out when they are available.
c.) manually disable http pipeline use in apt
    $ echo 'Acquire::http::Pipeline-Depth "0";' |
      sudo tee /etc/apt/apt.conf.d/99-no-pipelining

Should you choose not to take appropriate action, you will likely
experience transient apt downloading errors after the change is
implemented. In order to give appropriate time to apply the change, this
transition will not occur before April 18, 2012. 

For users of Ubuntu 8.04 LTS AMIs, you will need to take
options 'b' or 'c'. There is not a package update deliverable fix at this
time. For Ubuntu 10.10, the update will be released on its end-of-life,
which is April 10th, 2012.

If you have any questions, please feel free to follow up to this email

Ben Howard

[1] https://lists.ubuntu.com/archives/ubuntu-cloud/2012-January/000715.html
[2] https://lists.ubuntu.com/archives/ubuntu-cloud/2012-March/000744.html
[3] https://bugs.launchpad.net/ubuntu/+source/apt/+bug/948461


Ben Howard
ben.howard at canonical.com
GPG ID 0x5406A866

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