Kubeconfig not used

[maitredede]

Contributing guidelines

• I've read the contributing guidelines and wholeheartedly agree

I've found a bug and checked that ...

• ... the documentation does not mention anything about my problem
• ... there are no open or closed issues that are related to my problem

Description

Using buildx plugin v0.10.4, I am using a gitlab CI task to create a kubernetes builder. The kubernetes config file is at default place : /root/.kube/config in runner task. It is properly used (kubectl get nodes is ok).

When I want to create a builder docker buildx create --bootstrap --driver=kubernetes [...] I have an error User "system:anonymous" cannot get resource "deployments" in API group "apps" in the namespace "gitlab-ci".

I also tried to set env var KUBECONFIG, but it does not change the behavior.

It may be related to #1676

Expected behaviour

The builder creation command docker buildx create --bootstrap --driver=kubernetes [...] should work.

I have downgraded to v0.9.1, it works :

• github.com/docker/buildx v0.9.1 ed00243
• github.com/docker/buildx 2af40b7 2af40b7

Actual behaviour

Error User "system:anonymous" cannot get resource "deployments" in API group "apps" in the namespace "gitlab-ci".
Tested with :

• github.com/docker/buildx v0.10.4 c513d34
• github.com/docker/buildx 948414e 948414e

Buildx version

github.com/docker/buildx v0.10.4 c513d34

Docker info

No response

Builders list

Builder not yet created

Configuration

docker buildx create --name=mybuilder --platform=linux/amd64 --node=amd64

### Logs

_No response_

### Additional info

_No response_

[maitredede]

Based on #1676,

buildx/builder/node.go

Lines 80 to 89 in 4a73abf

	kcc, err = ctxkube.ConfigFromContext(n.Endpoint, contextStore)
	if err != nil {
	// err is returned if n.Endpoint is non-context name like "unix:///var/run/docker.sock".
	// try again with name="default".
	// FIXME(@AkihiroSuda): n should retain real context name.
	kcc, err = ctxkube.ConfigFromContext("default", contextStore)
	if err != nil {
	logrus.Error(err)
	}
	}

:

I have tried with a custom version of buildx with logging, and the error is pretty disapointing :

context "kubernetes:///ci-job-513721-nomarch?deployment=ci-job-513721-nomarch-amd64&kubeconfig=%2Froot%2F.kube%2Fconfig": context not found: open /root/.docker/contexts/meta/23abaa6b4bdd98bdf9056a5529007b5d3303031a61dff0664eca9aadc18d5e7e/meta.json: no such file or directory

[crazy-max]

@maitredede This should be fixed since 0.11.2 (#1957)