Kwokctl failed to create cluster by default image when runtime is kind

[Fish-pro]

Please provide an in-depth description of the question you have:

When you run the following command to install the cluster, the installation fails

➜  kwok kwokctl create cluster --name kwok1 --runtime kind
Creating cluster                                                   cluster=kwok1
Pull image                    cluster=kwok1 image=docker.io/kindest/node:unknown
Error response from daemon: manifest for kindest/node:unknown not found: manifest unknown: manifest unknown
ERROR Failed to setup configcluster=kwok1 err="docker pull docker.io/kindest/node:unknown: exit status 1"
Cluster is cleaned up                                              cluster=kwok1
ERROR Execute exit err="docker pull docker.io/kindest/node:unknown: exit status 1"

What do you think about this question?:

The cause is that the values of environment variables KWOK_KUBE_VERSION and KWOK_VERSION are read as image tags by default. If the environment variables do not exist, the following reference is used，when pull an image, the image does not exist

var (
	Version      = "unknown"
	KubeVersion  = "unknown"
	ImagePrefix  = "registry.k8s.io/kwok"
	BinaryPrefix = "https://github.com/kubernetes-sigs/kwok/releases/download"
	BinaryName   = "kwok-" + runtime.GOOS + "-" + runtime.GOARCH
)

So I understand is it possible to provide a default installation version when the user does not specify environment variables or parameters?

Environment:
kwokctl version: latest

[wzshiming]

refer to https://github.com/kubernetes-sigs/kwok/pull/94/files

We didn't actually release the latest tag, docker.io/kindest/node is the same as us.

$ skopeo list-tags docker://registry.k8s.io/kwok/kwok
{
    "Repository": "registry.k8s.io/kwok/kwok",
    "Tags": [
        "sha256-8f03c71a0c4b20c7b2ba00a5864efb85dc8cec948d880b3f6cf0d653d037e383.sig",
        "v0.0.1"
    ]
}

[Fish-pro]

refer to https://github.com/kubernetes-sigs/kwok/pull/94/files

We didn't actually release the latest tag, docker.io/kindest/node is the same as us.

$ skopeo list-tags docker://registry.k8s.io/kwok/kwok
{
    "Repository": "registry.k8s.io/kwok/kwok",
    "Tags": [
        "sha256-8f03c71a0c4b20c7b2ba00a5864efb85dc8cec948d880b3f6cf0d653d037e383.sig",
        "v0.0.1"
    ]
}

@wzshiming
Thanks for your reply. I understand that my build method is wrong. I noticed that KUBE_VERSION and VERSION values are set in release.sh, so there is no problem
hack/releases.sh

  if [[ "${VERSION}" != "" ]]; then
    LDFLAGS+=("-X sigs.k8s.io/kwok/pkg/consts.Version=${VERSION}")
  fi
  if [[ "${KUBE_VERSION}" != "" ]]; then
    LDFLAGS+=("-X sigs.k8s.io/kwok/pkg/consts.KubeVersion=${KUBE_VERSION}")
  fi