Local builds and rebase

General
1

What is the recommended way to rebase to an image built locally?

To be concrete:
I installed Fedora atomic sway.
Then I cloned this repo and build the image: GitHub - thesaigoneer/idefix-saigon: Nwg-shell for Sway and Hyprland on UBlue

Then I built the image with:
podman build -t idefix-saigon .

If I were using the remote image, I would do:

rpm-ostree rebase ostree-unverified-registry:ghcr.io/thesaigoneer/idefix-saigon:latest
systemctl reboot

then:

rpm-ostree rebase ostree-image-signed:docker://ghcr.io/thesaigoneer/idefix-saigon:latest
systemctl reboot

But how I can accomplish this with a locally built image? I know it wouldn’t make sense in this case when a remote image is available, but I’m curious how it could be done for more general local build cases.

2

If you are locally building it and it’s in your image store you can use bootc switch

If built using rootful podman
bootc switch --transport containers-storage /name/of/image

Built using docker
bootc switch --transport docker-daemon /name/of/image

Take a look at the different transport options. By default it will use registry.

You will likely not go through the process of making it a signed image since you will not serve it from a registry

3

Thanks! I’ll share the other error I ran into in case someone runs into them.

I still ran into trouble with

bootc switch --transport containers-storage localhost/idefix-saigon:latest

which gave me this error:

failed to invoke method OpenImage: failed to invoke method OpenImage: reference "[overlay@/var/lib/containers/storage+/run/containers/storage:overlay.imagestore=/usr/lib/containers/storage,overlay.mountopt=nodev,metacopy=on]docker.io/library/idefix-saigon:latest" does not resolve to an image ID

I had not built the image with sudo, so when I looked at where the images were with:

podman info --format '{{.Store.GraphRoot}}'

I saw they were in my user’s home under .local/share/containers/storage.

Like you said, it must be built using “rootful podman,” so I reran as:

sudo podman build -t localhost/idefix-saigon --pull=always .

Then did:

sudo bootc switch --transport containers-storage localhost/idefix-saigon:latest

and that worked.

Just laying it out here explicitly in case others get similar errors.

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