[ubuntu-cloud-announce] Ubuntu archive mirrors in us-east-1 moved to S3

[Scott Moser]

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In an effort to improve reliability of the Ubuntu archive mirrors,
Canonical undertook a project to host the archive utilized by EC2
instances with Amazon's S3.  We announced in April [1] that we would be
switching over to the new mirrors and asked users to make preparations.

As of Wednesday, June 13, the Ubuntu archive mirrors in the us-east-1
region have been switched over to S3. The immediate effect of this change
is that AWS VPC instances in us-east-1 will no longer experience
bug 615545 [2] and will have access to the default selected Ubuntu
mirrors.

If you had applied software updates after April 1, 2012, or are using any
official Ubuntu images released after that date, then no action is
required. The current Amazon Quickstart and Amazon Marketplace images have
already been updated.

However, if you have not taken the precautions announced, then you will
experience 403 or 404 errors during update or installation. Notably,
Ubuntu 11.04 users will see 403 errors while updating the
apt meta-data and Ubuntu 10.04, 11.10 and 12.04 users may see hashsum or
size mismatches.

If you have not applied software updates, then you will need to manually
disable http pipelining usage in apt.

This can be done simply with:
    $ echo 'Acquire::http::Pipeline-Depth "0";' |
      sudo tee /etc/apt/apt.conf.d/99-no-pipelining

If you have instances or images in other regions, where the transition to
S3 mirrors has not yet taken place, you can get the same effect of the
above by either:

a.) upgrade cloud-init:
    $ sudo apt-get update ; sudo apt-get install -y cloud-init
b.) launch official AMIs released after 2012-04-01, which have
    the fix included. Please see http://cloud-images.ubuntu.com/release
    for the latest AMI's.  Amazon EC2 Quickstart menu has been updated
    appropriately.

We expect that the remaining EC2 S3 regions will be activated in the
coming week. Please take this opportunity to update and avoid issues
later.

- --
[1] https://lists.ubuntu.com/archives/ubuntu-cloud/2012-April/000752.html
[2] https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/615545

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