c2w CLI does not work on Container Environments

[sr229]

Trying to run c2w on a Cloud IDE utilising either a Firecracker VM or Docker in its backend results in c2w not working because it tries to mount /rootfs/dev/null which is not permitted by the environment.

This is replicable using Gitpod or CSB.

[ktock]

Thanks for posting that issue. Currently that file is created during image conversion but yes, that won't work in some environment and that should be created during runtime.

[microchipgnu]

I tried something here https://github.com/microchipgnu/container4container2wasm

Take a look and let me know if this makes sense.

It worked for me, but looking for ways to improve it.

[westurner]

• https://github.com/microchipgnu/container4container2wasm/blob/ccd1789f0f474b9209158e8fa9c3e42695247409/docker_entrypoint.sh#L57-L83

DOCKER="docker"
DOCKER="podman"
DOCKER="podman-remote"
DOCKER="nerdctl"

DOCKER_BUILD="docker buildx"
DOCKER_BUILD="nerdctl build"  # buildx
DOCKER_BUILD="podman build"

Though probably just docker buildx and maybe nerdctl build work?

[westurner]

• podman is one alternative to the docker provisioning steps in run_conversion.sh: https://github.com/microchipgnu/container4container2wasm/blob/main/run_conversion.sh