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Checking for multiple registries when login/logout #24888

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5 changes: 5 additions & 0 deletions cmd/podman/login.go
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ import (

"github.com/containers/common/pkg/auth"
"github.com/containers/common/pkg/completion"
"github.com/containers/image/v5/pkg/sysregistriesv2"
"github.com/containers/image/v5/types"
"github.com/containers/podman/v5/cmd/podman/common"
"github.com/containers/podman/v5/cmd/podman/registry"
Expand Down Expand Up @@ -99,6 +100,10 @@ func login(cmd *cobra.Command, args []string) error {
DockerInsecureSkipTLSVerify: skipTLS,
}
common.SetRegistriesConfPath(sysCtx)
registriesFromFile, _ := sysregistriesv2.UnqualifiedSearchRegistries(sysCtx)
if len(registriesFromFile) > 1 {
return errors.New("multiple registries in registry.conf, a registry must be provided")
}
Comment on lines +103 to +106
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This is a breaking change so we cannot accept this until a 6.0 IMO.
And most importantly this code is broken. You always reject more than one registry even if one was specifed as argument on the cli (in the args array)

Any the login code seem shared between buildah and skopeo as well so if we decide to fix this we should fix this for all in https://github.com/containers/common/blob/main/pkg/auth/auth.go

And if you look into that code you see there is already an AcceptUnspecifiedRegistry option which is quite whay you do here but it we can add another case there for this new behavior.
https://github.com/containers/common/blob/514bf04d8e6a6ac19b71147b534875ca8001785f/pkg/auth/auth.go#L137

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@lslavkov lslavkov Jan 9, 2025 •
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So if I understand correctly that registriesFromFile is gonna fail regardless if we add which registry we wish to login?

I understand your point now. The approach there is more elegant that this one. Do you want me to modify to something similar to that? https://github.com/containers/common/blob/514bf04d8e6a6ac19b71147b534875ca8001785f/pkg/auth/auth.go#L137

loginOptions.GetLoginSet = cmd.Flag("get-login").Changed
return auth.Login(context.Background(), sysCtx, &loginOptions.LoginOptions, args)
}
6 changes: 6 additions & 0 deletions cmd/podman/logout.go
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Original file line number Diff line number Diff line change
@@ -1,10 +1,12 @@
package main

import (
"errors"
"os"

"github.com/containers/common/pkg/auth"
"github.com/containers/common/pkg/completion"
"github.com/containers/image/v5/pkg/sysregistriesv2"
"github.com/containers/image/v5/types"
"github.com/containers/podman/v5/cmd/podman/common"
"github.com/containers/podman/v5/cmd/podman/registry"
Expand Down Expand Up @@ -50,5 +52,9 @@ func init() {
func logout(cmd *cobra.Command, args []string) error {
sysCtx := &types.SystemContext{}
common.SetRegistriesConfPath(sysCtx)
registriesFromFile, _ := sysregistriesv2.UnqualifiedSearchRegistries(sysCtx)
if len(registriesFromFile) > 1 {
return errors.New("multiple registries in registry.conf, a registry must be provided")
}
return auth.Logout(sysCtx, &logoutOptions, args)
}
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