Maintaned? about img

[mieliespoor]

Any chance that img could be revived? Possibly adding additional maintainers that could help? Looking at the network graph, it would seem there are active developers that could help with this project.

[lel-amri]

I tried replacing img with buildkit in my workflow.
It actually went pretty well. The only "drawback" is (well, "was", it isn't really a problem anymore for me) the fact that you need three binaries to emulate img: buildkitd, buildkitctl and rootlesskit. Other than that, I had no issue bending my scripts to use buildkit instead of img.

So much changed between the version used by img and the latest of buildkit that only someone well versed in buildkit would be able to make the necessaries patches to either maintain or fork img, and I believe none is interested in working on img.
I'm now convinced that img can be replaced by builtkitd (with the "deamonless" script) for most of the use cases.

[towolf]

For me the big advantage is that this project can be used as a drop-in replacement and it presents such a familiar interface that we can basically symlink img to docker and it will work for the most basic use cases. It even works locally like an easy to use standalone binary.

Buildkit rootless and daeminless is a much bigger switch.

[AkihiroSuda]

I'm one of the maintainers of img but I have to admit that I don't have enough bandwidth to maintain img.

I'd suggest using the upstream BuildKit directly: https://github.com/moby/buildkit
BuildKit also provides a helper script for (pseudo-)daemonless mode: https://github.com/moby/buildkit/blob/master/examples/buildctl-daemonless/buildctl-daemonless.sh

Usage: https://github.com/moby/buildkit#daemonless

# rootful
docker run \
    -it \
    --rm \
    --privileged \
    -v /path/to/dir:/tmp/work \
    --entrypoint buildctl-daemonless.sh \
    moby/buildkit:master \
        build \
        --frontend dockerfile.v0 \
        --local context=/tmp/work \
        --local dockerfile=/tmp/work

# rootless
docker run \
    -it \
    --rm \
    --security-opt seccomp=unconfined \
    --security-opt apparmor=unconfined \
    -e BUILDKITD_FLAGS=--oci-worker-no-process-sandbox \
    -v /path/to/dir:/tmp/work \
    --entrypoint buildctl-daemonless.sh \
    moby/buildkit:master-rootless \
        build \
        --frontend \
        dockerfile.v0 \
        --local context=/tmp/work \
        --local dockerfile=/tmp/work

[lel-amri]

@AkihiroSuda:

Correct me if I'm wrong, img does have very useful features that buildkit doesn't: img can run rootless outside of containers, and it is truely daemonless.

I'm extensively using img for a special use-case: Creating LXC containers from Dockerfile files. I do not use Docker per se and img is the only tool that I could find out there at the time that answered my needs.

I'd really love to see img being more maintained. It seems that @jessfraz, the other carry of this project beside you, also abandoned the project. :(

[AkihiroSuda]

Correct me if I'm wrong, img does have very useful features that buildkit doesn't: img can run rootless outside of containers, and it is truely daemonless.

BuildKit supports rootless too https://github.com/moby/buildkit/blob/master/docs/rootless.md

[alpharde]

I'll have to agree with @towolf, anyone knows a replacement that isn't buildkit?