I believe changing the preseed.cfg file to use an IP address for the archive instead of the domain name will work around this; it's not a good long term solution since it messes up ubuntu's dns load balancing, but if you need to perform an install this might work. I'm in the process of verifying this.
I believe changing the preseed.cfg file to use an IP address for the archive instead of the domain name will work around this; it's not a good long term solution since it messes up ubuntu's dns load balancing, but if you need to perform an install this might work. I'm in the process of verifying this.
d-i mirror/ http/hostname string archive.ubuntu.com
to
d-i mirror/ http/hostname string (looked up ip address)
and... thank you all for quickly investigating the issue! :)