Add support for Kubernetes 1.12.1 (#3963)

packer/install-dependencies.sh

@@ -118,7 +118,7 @@ done
 pullContainerImage "docker" "busybox"
 
 # TODO: fetch supported k8s versions from an acs-engine command instead of hardcoding them here
-K8S_VERSIONS="1.7.15 1.7.16 1.8.14 1.8.15 1.9.10 1.9.11 1.10.7 1.10.8 1.11.2 1.11.3 1.12.0"
+K8S_VERSIONS="1.7.15 1.7.16 1.8.14 1.8.15 1.9.10 1.9.11 1.10.7 1.10.8 1.11.2 1.11.3 1.12.0 1.12.1"
 
 for KUBERNETES_VERSION in ${K8S_VERSIONS}; do
     HYPERKUBE_URL="k8s.gcr.io/hyperkube-amd64:v${KUBERNETES_VERSION}"

pkg/api/common/versions.go

@@ -84,6 +84,7 @@ var AllKubernetesSupportedVersions = map[string]bool{
 	"1.12.0-rc.1":    false,
 	"1.12.0-rc.2":    false,
 	"1.12.0":         true,
+	"1.12.1":         true,
 }
 
 // GetDefaultKubernetesVersion returns the default Kubernetes version, that is the latest patch of the default release