Ubuntu on EC2

ec2-set-apt-sources fails in new us-east-1d availability zone

Bug #387027 reported by Abernix on 2009-06-14

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	EC2 init scripts	Fix Released	Undecided	Unassigned
	Ubuntu on EC2	Fix Released	Undecided	Unassigned

Bug Description

This is a bug in Amazon's new us-east-1d availability zone, but I am curious if a change should be made to ec2-set-apt-sources to prevent it. The problem crops up because ec2-set-apt-sources assumes that it will figure out what the current availability zone is. If it doesn't find it, it doesn't have a 'failover' archive that it will use for apt sources.

I am running image 5d59be34, Ubuntu 8.04.2.

See, currently, if you try to get the availability-zone in the new availability zone that was just launched on June 9th (us-east-1d), you will get the following error:

$ curl http://169.254.169.254/latest/meta-data/placement/availability-zone
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
         "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
  <title>404 - Not Found</title>
</head>
<body>
  <h1>404 - Not Found</h1>
</body>
</html>

This obviously differs from the other zones where you would get:

$ curl http://169.254.169.254/latest/meta-data/placement/availability-zone
us-east-1c

When ec2-set-apt-sources does this it just fails because it does not set the archive successfully. Therefore, when you go to apt-get update, you get errors:

W: GPG error: http://ppa.launchpad.net hardy Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E048451D9EE6D873

If you set a default archive (see attached hack for an example solution), the problem goes away.

So, the question is, should ec2-set-apt-sources have a failover archive and if so, what should it be? My feeling is that it should have at least SOMETHING to ensure that if Amazon does drop the ball with their API (like they currently have), the aptitude functions will still continue to operate properly, even if it is at the cost of transferring data inter-zone or beyond.

Tags:

Related branches

lp:~soren/ec2-init/ec2-init.fallback-mirror (Merged)

lp:ubuntu/karmic/ec2-init

Revision history for this message

Abernix (abernix) wrote on 2009-06-14:

The Hack That Fixes It Edit (466 bytes, text/plain)

Revision history for this message

Chuck Short (zulcss) wrote on 2009-06-18:

Thanks for the bug report. It does make sense for there to be a failover archive if amazon doesnt return the right information.

Regards
chuck

Changed in ubuntu-on-ec2:
status:	New → Confirmed
tags:	added: ec2-init

Soren Hansen (soren) on 2009-06-26

Changed in ubuntu-on-ec2:
status:	Confirmed → Fix Committed
Changed in ec2-init:
status:	New → Fix Committed

Revision history for this message

Scott Moser (smoser) wrote on 2009-08-11:

verified fixed in http://ec2-images.ubuntu.com/karmic/20090811.2/ubuntu-
ec2-karmic-amd64.img.gz (ec2-init 0.4.99-0ubuntu2)

$ dpkg-query --showformat '${version}\n' --show "ec2-init"
0.4.99-0ubuntu2

ec2init/__init__.py now has method get_mirror_from_availability_zone that does:

    def get_mirror_from_availability_zone(self, availability_zone):
        if availability_zone.startswith("us"):
            return 'http://us.ec2.archive.ubuntu.com/ubuntu/'
        elif availability_zone.startswith("eu"):
            return 'http://eu.ec2.archive.ubuntu.com/ubuntu/'