** Description changed: + + === Begin SRU Information === + [Impact] + * Currently, local mirror selection is done specifically for EC2 instances + in the DataSource code. cloud-init will select + 'us-east-1a.ec2.archive.ubuntu.com' as a mirror in EC2. However, in other + clouds, there is no way to get a local mirror selected. + + The change here is to allow mirrors to be specified in configuration based + on templates that can include the "availability-zone". This makes the EC2 + code generic and allows a cloud provider to have cloud-init select a local + mirror simply by presenting 'availability-zone' in the metadata. + + With this change, if a cloud provider puts 'region-1.mycloud' into their + datasource metadata as the availability-zone, cloud-init will select + a mirror at 'region-1.mycloud.clouds.archive.ubuntu.com'. By default, + Canonical's dns will return that as a wildcard for archive.ubuntu.com, + but the information is availble now in the dns request to specify + the address of a local mirror. + + [Test Case] + * This is really a feature backport. There is no specific bug here. + However, the behavior change is easily seen by running an instance on a + openstack cloud. Previously, the mirror selected would be + 'archive.ubuntu.com'. With the change in place, the mirror will be: + 'nova.clouds.archive.ubuntu.com' as by default openstack provides the + string 'nova' as the availability-zone. + + [Regression Potential] + * Mirror selection will change. It is possible that users relying on + the old behavior will have to modify something. + + [Other Information] + * We want this behavior brought back to 12.04 so that LTS images can "just work" + to select a local mirror simply by a change in DNS records. It will enable + large clouds to provide local mirrors easily. + + === End SRU Information === + currently, the ec2 datasource has some code that selects the mirror location by looking at the availability-zone. I think this is generally a pretty good idea. I'd like to extend that to other datasources, and not limit to ".ec2.archive.ubuntu.com". The goal would be to basically check for a mirror at: - <availability-zone>[.<cloud>][dns-subdomain] + <availability-zone>[.<cloud>][dns-subdomain] dns subdomain would default to '.cloud.archive.ubuntu.com'. if the datasource provided the 'cloud' value, we'd use that, but otherwise just use availability-zone. This would fit in with what we're currently doing on ec2, but would extend to others. I'd just treat the "cc-direction-[0-9]" availability-zones specially, to know that this is an ec2 one. Then basically append ".ec2" in that case.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1037727 Title: support adding region/availability to mirror selection To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1037727/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
