Refactor to be called as an interface implementation from docker-compose

[westurner]

See: "Support podman as a backend"
docker/compose#7292

Could docker-compose call into podman-compose if a CLI arg or an environment variable is passed (and appropriate abstractions in docker-compose are implemented)?

DOCKER_COMPOSE_DRIVER=podman
docker-compose --driver=podman

[muayyad-alsadi]

As far as I know docker-compose talks to a daemon not a cli

https://github.com/docker/compose/blob/master/compose/cli/docker_client.py

And it does not do mapping to fix user-space limitations.

[westurner]

Docker compose works by interacting with the docker socket. Factoring out an interface and a compose implementation for each of those messages to the socket would make it possible to write an implemention that instead calls podman. Would you be open to a patch that adds something like an adapter facade (which would implement that interface and call into podman-compose? There needn't be multiple docker-compose.yml parser implementations.

…

On Sat, Mar 14, 2020, 5:33 AM Muayyad Alsadi ***@***.***> wrote: As far as I know docker-compose talks to a daemon not a cli https://github.com/docker/compose/blob/master/compose/cli/docker_client.py And it does not do mapping to fix user-space limitations. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#126 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAMNSZAKLLGTE55WOJFKFTRHNFNNANCNFSM4LILUUEQ> .

[manics]

FYI the Podman apiv2 aims to be compatible with the docker API https://podman.io/blogs/2020/01/17/podman-new-api.html

[westurner]

Thanks, hadn't seen the mostly-docker-compatible HTTP apiv2: /swagger : https://github.com/containers/libpod/blob/master/pkg/api/server/swagger.go Docker-compose.yml v3 services do not require swarm mode (which podman doesn't support), but there's otherwise no easy/built-in zero-downtime way to do rolling or blue-green deployments without swarm or k3s/k8s? https://docs.docker.com/compose/compose-file/

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On Sat, Mar 14, 2020, 9:43 AM Simon Li ***@***.***> wrote: FYI the Podman apiv2 aims to be compatible with the docker API https://podman.io/blogs/2020/01/17/podman-new-api.html — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#126 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAMNS5DE2YNHVZUFVZWNC3RHOCX7ANCNFSM4LILUUEQ> .

[westurner]

"Announcing the Compose Specification"
https://www.docker.com/blog/announcing-the-compose-specification/

• https://www.compose-spec.io/
• https://github.com/compose-spec/compose-spec/
• "Call for maintainers"
  Call for maintainers  compose-spec/compose-spec#57
• Reference implementation (in Go)
  https://github.com/compose-spec/compose-ref