Commits on Jul 21, 2022

1. kola: Change --oscontainer to use new ostree native containers …

   Quite a while ago we added this special case code to kola
   which learned how to do in-place updates to the weird bespoke
   "ostree repo in container" OCP/RHCOS-specific container image.
   
   A huge benefit of the change to use ostree-native containers
   is that this approach can now be shared across FCOS/RHCOS.
   
   (Also, rpm-ostree natively understands this, so it's much much
    more efficient and less awkward than the wrappers we had in `pivot` around
    rpm-ostree)
   
   But the benefits get even larger: this issue:
   coreos#2685
   proposes rethinking of our pipeline to more cleanly split up
   "build OS update container" from "build disk images".
   
   With this, it becomes extra convenient to do a flow of:
   
   - build OS update container, push to registry
   - `kola run -p stable --oscontainer quay.io/fcos-devel/testos@sha256...`
   
   IOW we're not generating a disk image to test the OS update - we're
   using the *stable* disk image and doing an in-place update before
   we run tests.
   
   Now...as of right now nothing in the pipeline passes this flag,
   so the code won't be used (except for manual testing).
   
   Suddenly with this, the number of tests we can run roughly *doubles*.
   For example, we can run e.g.
   `kola run rpm-ostree` both with and without `--oscontainer`.
   
   In most cases, things should be the same.  But, I think it will
   be interesting to try to explictly use this for at least some tests;
   it's almost a full generalization of the `kola run-upgrades` bits.

   

   cgwalters committed Jul 21, 2022
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