Repository and tag for CoreDNS changed in 1.8.0 (Kubernetes 1.21)

[afbjorklund]

Error response from daemon: manifest for k8s.gcr.io/coredns:1.8.0 not found: manifest unknown: Failed to fetch "1.8.0" from request "/v2/coredns/manifests/1.8.0".

kubernetes/kubernetes@40862c3

--- a/cmd/kubeadm/app/constants/constants.gopkg/minikube/bootstrapper/images/images.go
+++ b/cmd/kubeadm/app/constants/constants.go
@@ -323,7 +323,7 @@ const (
        CoreDNSDeploymentName = "coredns"
 
        // CoreDNSImageName specifies the name of the image for CoreDNS add-on
-       CoreDNSImageName = "coredns"
+       CoreDNSImageName = "coredns/coredns"
 
        // KubeDNSConfigMap specifies in what ConfigMap in the kube-system namespace the kube-dns config should be stored
        KubeDNSConfigMap = "kube-dns"
@@ -344,7 +344,7 @@ const (
        KubeDNSVersion = "1.14.13"
 
        // CoreDNSVersion is the version of CoreDNS to be deployed if it is used
-       CoreDNSVersion = "1.7.0"
+       CoreDNSVersion = "v1.8.0"
 
        // ClusterConfigurationKind is the string kind value for the ClusterConfiguration struct
        ClusterConfigurationKind = "ClusterConfiguration"

So this change needs to be reflected in the minikube code as well.

func coreDNS(v semver.Version, mirror string) string

[afbjorklund]

Possibly related to #11290 which changes how the bootstrapper images for kubeadm work.