Apt Improvements
= Rationale =
As described in bug 972077, apt's on-disk format makes it difficult or impossible to update the archive without exposing a race condition to a client. While in theory potentially very small, in reality it makes 'apt' a very weak link in a automated install scenario.
= Goal =
Make apt hashsum mismatch errors go away permanently, and remove racey conditions when updating apt repositories.
Blueprint information
- Status:
- Not started
- Approver:
- Dave Walker
- Priority:
- Medium
- Drafter:
- Ubuntu Server
- Direction:
- Approved
- Assignee:
- Robie Basak
- Definition:
- Approved
- Series goal:
- Accepted for raring
- Implementation:
-
Not started
- Milestone target:
-
ubuntu-13.04-feature-freeze
- Started by
- Completed by
Related branches
Whiteboard
Etherpad: http://
Blueprint: https:/
Proposed spec: https:/
Discussion: https:/
= User Stories =
* Jim is using JuJu, and adds a node. He does not want to see apt fail due to a race condition.
* Marley is using the Ubuntu installer for network based installs against a local mirror that is updated from a remote mirror. He does not want installs to fail due to the mirror being updated.
* Sally wants to use a http proxy to cache deb downloads and does not want to be vulnerable to caching mismatched files that would cause apt failures.
= Assumptions =
None
= Test Plans =
Test will be conducted in 2 ways:
a.) implied test: much of our automated infrastructure relies on apt and previously failed quite commonly due to apt. These errors should be erased.
b.) explicit test: we should ideally have some canary that would ensure our public mirrors do not fail. One example starting point is [1]
[1] https:/
= Release Note =
Ubuntu's public mirrors now contain an improved archive format. Coupled with updates to apt transient apt-update errors are a thing of the past.
Note: feature freeze is upon us, and I think this work is too invasive for an FFe. My priorities mean that I can't work on this for the next few weeks, so it looks like this will have to slip to R. --racb
[21-Sep-2012] Postponing remaining work items until R cycle per Robie's bove note. -a.rosales
I see no reason why this needs more sessions/
Work Items
Work items:
[racb] debootstrap production code: POSTPONED
[racb] apt production code: POSTPONED
[darkmuggle-
apt-ftparchive by-hash generator command: POSTPONED
apt-ftparchive modifications to automatically generate by-hash: POSTPONED
ubumirror patch: POSTPONED
debmirror patch: POSTPONED
Fix squid-deb-proxy cache settings as appropriate: POSTPONED
[smoser] Pin RR DNS in squid-deb-proxy: POSTPONED
Testing: POSTPONED
Implement InRelease in archive.ubuntu.com mirrors: POSTPONED
Add by-hash generation to archive.ubuntu.com: POSTPONED
Add by-hash generation to Launchpad PPAs: POSTPONED
[racb] apt proof of concept: DONE
[racb] debootstrap proof of concept: DONE
[racb] s3aptmirror patch: DONE
[racb] Live S3 mirror: DONE
Dependency tree
* Blueprints in grey have been implemented.
