Merge pull request #100 from StrongMonkey/v1.18-update

Update kubernete v1.18.0-beta.0

Author: StrongMonkey

Dockerfile

@@ -1,4 +1,4 @@
-FROM gcr.io/google_containers/hyperkube:v1.17.2
+FROM gcr.io/google_containers/hyperkube:v1.18.0-beta.0
 RUN sed -i -e 's!\bmain\b!main contrib!g' /etc/apt/sources.list && \
     apt-get update && apt-get upgrade -y && apt-get clean && \
     clean-install apt-transport-https gnupg1 curl zfsutils-linux \

Dockerfile.arm64

@@ -1,4 +1,4 @@
-FROM gcr.io/google_containers/hyperkube:v1.17.2
+FROM gcr.io/google_containers/hyperkube:v1.18.0-beta.0
 RUN sed -i -e 's!\bmain\b!main contrib!g' /etc/apt/sources.list && \
     apt-get update && apt-get upgrade -y && apt-get clean && \
     clean-install apt-transport-https gnupg1 curl zfsutils-linux \

Dockerfile.windows

@@ -10,7 +10,7 @@ RUN if (-not (Get-Command Expand-7Zip -ErrorAction Ignore)) { \
             Exit 1; \
        } \
     }
-ENV K8S_VERSION v1.17.2
+ENV K8S_VERSION v1.18.0-beta.0
 RUN $URL = ('https://dl.k8s.io/{0}/kubernetes-node-windows-amd64.tar.gz' -f $env:K8S_VERSION); \
     \
     function Expand-GZip ($inFile, $outFile) { \