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install: Add support for --root-ssh-authorized-keys #296

Merged
merged 2 commits into from
Feb 5, 2024
Merged

install: Add support for --root-ssh-authorized-keys #296

merged 2 commits into from
Feb 5, 2024

Commits on Feb 2, 2024

  1. install: Rename clashing variable 

    I will need to access the outer `state` here in a later PR.

Signed-off-by: Colin Walters <[email protected]>
    @cgwalters
    cgwalters committed Feb 2, 2024
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  2. install: Add support for --root-ssh-authorized-keys 

    The current `bootc install` model is VERY opinionated: we install
the running container image to disk, and that is (almost!) it.

The only non-container out of band state that we support injecting right now
is kargs (via `--karg`) - we know we need this for machine local
kernel arguments.

(We do have a current outstanding PR to add a highly generic mechanism
 to inject arbitrary files in `/etc`, but I want to think about that more)

THis current strict stance is quite painful for
a use case like "take a generic container image and bootc install to-filesystem --alongside"
in a cloud environment, because the generic container may not
have cloud-init.

With this change it becomes extremely convenient to:

- Boot generic cloud image (e.g. AMI with apt/dnf + cloud-init)
- cloud-init fetches SSH keys from hypervisor (instance metadata)
- podman run -v /root/.ssh/authorized_keys:/keys:ro <image> bootc install ... --root-ssh-authorized-keys=/keys`

And then the instance will carry forward those hypervisor-provided
keys but without a dependency on cloud-init.

Another use case for this of course is being the backend of things
like Anaconda's kickstart verbs which support injecting SSH keys.

Signed-off-by: Colin Walters <[email protected]>
    @cgwalters
    cgwalters committed Feb 2, 2024
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