Use apt preferences to prefer packages from the mirror over the main repos #18793
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…repos Currently, if snapshots are enabled, then packages from the mirror and packages from the main repos have the same priority. This becomes problematic if the main repos have a package that's of a newer version than the snapshots, and something wants to install that newer version, even though it could be installed with that older version. For example, if a -dev package is being installed, and there's a newer version of the -dev and the main package in the main repos (compared to the snapshots), then apt will try to install the newer -dev package, which will have a dependency on the newer main package, but the older main package will still be installed. It could instead try to install the older -dev package from the snapshots, which would be installable. To fix this, use apt preferences to give the pacakges in the snapshot repo a higher priority than the ones in the main repo. This should be enough to convince apt to use packages from the snapshot repo whenever possible, but it still allows packages from the main repo to be installed, in case some change comes in that requires that for whatever reason. Signed-off-by: Saikrishna Arcot <sarcot@microsoft.com>
|
/azp run |
|
/azp run Azure.sonic-buildimage |
|
Azure Pipelines successfully started running 1 pipeline(s). |
1 similar comment
|
Azure Pipelines successfully started running 1 pipeline(s). |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Why I did it
Currently, if snapshots are enabled, then packages from the mirror and packages from the main repos have the same priority. This becomes problematic if the main repos have a package that's of a newer version than the snapshots, and something wants to install that newer version, even though it could be installed with that older version. For example, if a -dev package is being installed, and there's a newer version of the -dev and the main package in the main repos (compared to the snapshots), then apt will try to install the newer -dev package, which will have a dependency on the newer main package, but the older main package will still be installed. It could instead try to install the older -dev package from the snapshots, which would be installable.
Work item tracking
How I did it
To fix this, use apt preferences to give the pacakges in the snapshot repo a higher priority than the ones in the main repo. This should be enough to convince apt to use packages from the snapshot repo whenever possible, but it still allows packages from the main repo to be installed, in case some change comes in that requires that for whatever reason.
How to verify it
Which release branch to backport (provide reason below if selected)
Tested branch (Please provide the tested image version)
Description for the changelog
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)