Podman doesn't use a local image in `FROM` in Dockerfile/Containerfile about podman HOT 13 OPEN

I agree that should be the default behaviour, and not doing this is a bug.

podman build -t foobar
podman run foobar

Should work.

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can you replicate this outside devcontainers? like with a containerfile ?

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This looks like you did not fully specify the image name, just used a short name?

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@baude, I haven't tried, the issue seems to be short name resolution anyways.

@rhatdan, I did not specify anything, rather it's the devcontainer cli pulling from a locally built layer.

Is it wrong of me to assume that we should search locally first for short-names? I would've expected this if the image being pulled is of a conventional registry form (e.g. foo/bar)... I guess it's all a repositories, slashes or not. Nonetheless, I would expect local-first search before asking for for registry selection.

Also, why isn't localhost/vsc-cli-* an option? I can copy the string and run locally with

podman run --rm -it vsc-cli-*

I could post an issue to the devcontainer cli asking to prefix the image pull with localhost/... 🤔

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Here's some sample output during devcontainer build in the https://github.com/devcontainers/cli repo:

podman build -f /tmp/devcontainercli-person/updateUID.Dockerfile-0.65.0 -t vsc-cli-4ee3098167f24595df8161e2a6a226ab0bfe78567231ed22d21f0f0d45a5d006-uid --platform linux/amd64 --build-arg BASE_IMAGE=vsc-cli-4ee3098167f24595df8161e2a6a226ab0bfe78567231ed22d21f0f0d45a5d006 --build-arg REMOTE_USER=node --build-arg NEW_UID=1000 --build-arg NEW_GID=1000 --build-arg IMAGE_USER=node /tmp/devcontainercli-person/empty-folder
STEP 1/9: FROM vsc-cli-4ee3098167f24595df8161e2a6a226ab0bfe78567231ed22d21f0f0d45a5d006
? Please select an image: 
  ▸ registry.fedoraproject.org/vsc-cli-4ee3098167f24595df8161e2a6a226ab0bfe78567231ed22d21f0f0d45a5d006:latest
    registry.access.redhat.com/vsc-cli-4ee3098167f24595df8161e2a6a226ab0bfe78567231ed22d21f0f0d45a5d006:latest
    docker.io/library/vsc-cli-4ee3098167f24595df8161e2a6a226ab0bfe78567231ed22d21f0f0d45a5d006:latest

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@vrothberg PTAL

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git clone -b feat/local-dev https://github.com/island-is/island.is

The branch doesn't exist anymore. I assume it has been merged?

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Here's some sample output during devcontainer build in the https://github.com/devcontainers/cli repo:

Works on my end. Did you configure /etc/containers/registries.conf? For instance, the short-name-mode option?

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Note: requires installing the podman-docker package as it seems that devcontainer shells out to the client rather than using the socket.

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The branch doesn't exist anymore

Yes, merged to main. I updated the description.

Did you configure /etc/containers/registries.conf?

Hmm... It seems like, I did configure my registry.conf:

# # An array of host[:port] registries to try when pulling an unqualified image, in order.
# unqualified-search-registries = ["example.com"]
unqualified-search-registries = ["registry.fedoraproject.org", "registry.access.redhat.com", "docker.io"]

Nonetheless, I'm would still expect localhost to be searched for short-name image pulls.

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I added localhost to the unqualified-search-registries, and seems to have fixed the issue.

Again, I would like for localhost to be searched even if it weren't in the list

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Should this also work?

podman build -t foobar

cat <<EOF >> Containerfile.dynamic
FROM foobar
RUN cowsay
EOF

podman build -f Containerfile.dynamic

I would expect so, but apparently it doesn't. This is what devcontainers does; builds an image, then uses it in a dynamically generated containerfile, which is what is causing this issue.

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$ cat /tmp/Containerfile
from alpine
run echo hi
$ podman build -t foobar /tmp
STEP 1/2: FROM alpine
STEP 2/2: run echo hi
--> Using cache f2222d280005d435f8debfcfdf9809893feeb0bad4f35504801017de87714622
COMMIT foobar
--> f2222d280005
Successfully tagged localhost/foobar:latest
f2222d280005d435f8debfcfdf9809893feeb0bad4f35504801017de87714622
 $ podman images | grep foobar
localhost/foobar          latest      f2222d280005  2 minutes ago       8.09 MB
$ cat /tmp/Containerfile.dynamic 
from foobar
run echo hi again
$ podman build -f /tmp/Containerfile.dynamic -t foobar1 /tmp
STEP 1/2: FROM foobar
STEP 2/2: run echo hi again
hi again
COMMIT foobar1
--> 68f7823fd0dc
Successfully tagged localhost/foobar1:latest
68f7823fd0dc5eae28725e908ffbc8fde549762490221b2469e59f48535dece7
podman images | grep foobar
localhost/foobar1         latest      68f7823fd0dc  3 minutes ago  8.09 MB
localhost/foobar          latest      f2222d280005  4 minutes ago  8.09 MB

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