How buildkit my images direct to k3s namespace?

[jinanxiaolaohu]

I think it's a requirement.
I want to buildkit my app images directly to k3s which can deploy as a deployment

When i build my images, I can see it in ctr -n k8s.io i ls but I cann't find it in k3s ctr i ls

can u help me? thanks

[johannes-engler-mw]

Hi @jinanxiaolaohu ,

I got it working like that:

• create a config file for buildkit at /etc/buildkit/buildkitd.toml

[worker.oci]
enabled = false

[worker.containerd]
enabled = true
namespace = "k8s.io"
address = "/run/k3s/containerd/containerd.sock"

• start buildkitd daemon in the backend buildkitd &
• run buildctl like this (important is the tagging with docker.io/library/...)
  buildctl build --frontend=dockerfile.v0 --local context=../docker/ --local dockerfile=../docker/ --output type=image,name=docker.io/library/test_image:1.0,unpack=true
• verfify that the images are available with k3s crictl image | grep test_image

# k3s crictl image | grep test_image
docker.io/library/test_image                 1.0                    d65e61458f697       116MB

• start a container with the new image and a pullPolicy of Never
  kubectl run --image test_image:1.1 test --image-pull-policy='Never'
• check the logs

# kubectl describe pod test | grep present
  Normal   Pulled     46s (x5 over 2m51s)  kubelet            Container image "test_image:1.1" already present on machine

Hope this helps.

BR,
Johannes