~/.docker/config.json must exist for compatibility reasons

[marcosdiez]

Issue Description

on the mac, with podman 4.5.1, skaffold build was giving container authentication errors even after podman login.

The solution was

ln -sf ~/.config/containers/auth.json ~/.docker/config.json

obviously it took me 4 hours to find that out, so it that symlink could exist by default, others would benefit from it.

Steps to reproduce the issue

1. use mac m1
2. install podman
3. install skaffold

Describe the results you received

failed to fetch builder image [redacted]: initializing source docker:[redacted]: unable to retrieve auth token: invalid username/password: unknown: Authentication is required

Describe the results you expected

it should download the image

podman info output

podman on macos m1 (Ventura 13.2.1)

Client:       Podman Engine
Version:      4.5.1
API Version:  4.5.1
Go Version:   go1.20.4
Git Commit:   9eef30051c83f62816a1772a743e5f1271b196d7
Built:        Fri May 26 12:10:12 2023
OS/Arch:      darwin/arm64

Server:       Podman Engine
Version:      4.5.1
API Version:  4.5.1
Go Version:   go1.20.4
Built:        Fri May 26 14:58:19 2023
OS/Arch:      linux/arm64

Podman in a container

No

Privileged Or Rootless

None

Upstream Latest Release

Yes

Additional environment details

Additional environment details

Additional information

Additional information like issue happens only occasionally or issue happens with a particular architecture or on a particular setting

[rhatdan]

Could you open an issue with skaffold to support Podman.

[marcosdiez]

Hi,

I could, but I believe if this was implemented at the podman side, podman would be more compatible with docker, not only because of skaffold but everything else we can't imagine.

[rhatdan]

Well we don't want Podman to default to writing to files owned by Docker, it makes running docker and podman simultaniously a problem.

You can always set the REGISTRY_AUTH_FILE=$HOME/.docker/config.json and podman login will write there I believe, but we don't plan on doing this by default, and I also prefer the storing of secrets like this to be done on a tmpfs by default, in this case $XDG_RUNTIME_DIR/containers/auth.json, so they will not be stored in users homedir and will be removed when the user logs out or the system reboots. Will not be shared with NFS servers if homedir is on nfs for example.

[vrothberg]

It looks similar to #18617