feat: add support for Kubernetes 1.21.0-alpha.3

pkg/api/common/versions.go

@@ -247,6 +247,8 @@ var AllKubernetesSupportedVersions = map[string]bool{
 	"1.20.1":         true,
 	"1.20.2":         true,
 	"1.21.0-alpha.1": true,
+	"1.21.0-alpha.2": false, // disabled, see https://github.com/kubernetes/kubernetes/issues/98419
+	"1.21.0-alpha.3": true,
 }
 
 // AllKubernetesSupportedVersionsAzureStack is a hash table of all supported Kubernetes version strings on Azure Stack

vhd/packer/configure-windows-vhd.ps1

@@ -126,7 +126,7 @@ function Get-FilesToCacheOnVHD {
             "https://kubernetesartifacts.azureedge.net/kubernetes/v1.20.0/windowszip/v1.20.0-1int.zip",
             "https://kubernetesartifacts.azureedge.net/kubernetes/v1.20.1/windowszip/v1.20.1-1int.zip",
             "https://kubernetesartifacts.azureedge.net/kubernetes/v1.20.2/windowszip/v1.20.2-1int.zip",
-            "https://kubernetesartifacts.azureedge.net/kubernetes/v1.21.0-alpha.1/windowszip/v1.21.0-alpha.1-1int.zip"
+            "https://kubernetesartifacts.azureedge.net/kubernetes/v1.21.0-alpha.3/windowszip/v1.21.0-alpha.3-1int.zip"
         );
         "c:\akse-cache\win-vnet-cni\" = @(
             "https://kubernetesartifacts.azureedge.net/azure-cni/v1.1.6/binaries/azure-vnet-cni-singletenancy-windows-amd64-v1.1.6.zip",

vhd/packer/install-dependencies.sh

@@ -280,7 +280,7 @@ pullContainerImage "docker" "busybox"
 echo "  - busybox" >> ${VHD_LOGS_FILEPATH}
 
 K8S_VERSIONS="
-1.21.0-alpha.1
+1.21.0-alpha.3
 1.20.2
 1.20.1
 1.19.7