Commits on Jun 19, 2024

1. chunking: Add some doc comments …

   Just a drive by.

   

   cgwalters committed Jun 19, 2024
   Configuration menu

   • View commit details
   • Copy full SHA for dfcea4a
   • Browse repository at this point

   Copy the full SHA

   dfcea4a View commit details

   Browse the repository at this point in the history

2. container: Add support for re-exporting a fetched container …

   The status quo today is basically that with a "pure ostree"
   container image, one can pull it, and one *can* re-export
   it with `ostree container encapsulate`...but doing so
   loses *all chunking* i.e. you end up with a single
   giant layer again.
   
   Further, we don't support exporting derived images at all.
   
   Fix both of these with a new CLI and API, for example:
   
   ```
   $ ostree container image reexport --repo=/path/to/repo registry:quay.io/exampleos/someos:latest containers-storage:localhost/exampleos
   ```
   
   Now...before one gets too excited, this is still suboptimal
   in a bunch of ways:
   
   - Copying to `containers-storage` is super inefficient, we indirect
     through a local `oci` directory because of the lack of "push"
     support in containers-image-proxy, *and* we end up with a full
     physical copy of the files even when we *could* reflink;
     cc containers/storage#1849
   - Because we don't currently save tar-split data, the use
     case of pushing to a registry is virtually guaranteed to produce
     changed diffids, and we'll hence end up duplicating layers
     on the registry
   
   Now what is more interesting is that this code is going to help
   us a bit for the use case of "recommitting" a derived container
   image.
   
   Signed-off-by: Colin Walters <walters@verbum.org>

   

   cgwalters committed Jun 19, 2024
   Configuration menu

   • View commit details
   • Copy full SHA for 4374c05
   • Browse repository at this point

   Copy the full SHA

   4374c05 View commit details

   Browse the repository at this point in the history