anchor.diff:          rm -rfv /var/cache/apk/*
   
   # Google cloud work (copied from https://github.com/GoogleCloudPlatform/cloud-sdk-docker/blob/master/alpine/Dockerfile )
  -RUN     wget -q ${GCLOUD_SDK_URL} && \
  -        tar xzf ${GCLOUD_FILE_NAME} && \
  -        rm ${GCLOUD_FILE_NAME} && \
  +RUN     wget -q -O gcloud.tgz ${GCLOUD_SDK_URL} && \
  +        echo "${GCLOUD_SHA256}  gcloud.tgz" | sha256sum -c - && \
  +        tar xzf gcloud.tgz && \
  +        rm gcloud.tgz && \
           ln -s /lib /lib64 && \
           gcloud config set core/disable_usage_reporting true && \
           gcloud config set component_manager/disable_update_check true && \
  
positive.code: MAINTAINER Michael Venezia <mvenezia@gmail.com>
  
  ENV     TERRAFORM_VERSION=0.8.6
  ENV     TF_COREOSBOX_VERSION=v0.0.3
  ENV     TF_DISTROIMAGE_VERSION=v0.0.1
  ENV     TF_PROVIDEREXECUTE_VERSION=v0.0.4
  
  ENV     GCLOUD_SDK_VERSION=162.0.0
  ENV     GCLOUD_FILE_NAME=google-cloud-sdk-${GCLOUD_SDK_VERSION}-linux-x86_64.tar.gz
  ENV     GCLOUD_SDK_URL=https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/${GCLOUD_FILE_NAME}
  ENV     CLOUDSDK_PYTHON_SITEPACKAGES 1
  # google cloud kubectl is superceeded by downloaded kubectl
  ENV     PATH $PATH:/google-cloud-sdk/bin
  
  ENV     ETCD_VERSION=v3.2.5
  ENV     ETCDCTL_API=3
  
  ENV     K8S_VERSION=v1.8.1
  ENV     K8S_HELM_VERSION=v2.7.0
  
  ENV     K8S_VERSION_1_5=v1.5.8
  ENV     K8S_VERSION_1_6=v1.6.11
  ENV     K8S_VERSION_1_7=v1.7.8
  ENV     K8S_VERSION_1_8=v1.8.2
  
  ENV     K8S_HELM_VERSION_1_5=v2.3.1
  ENV     K8S_HELM_VERSION_1_6=v2.5.1
  ENV     K8S_HELM_VERSION_1_7=v2.6.2
  ENV     K8S_HELM_VERSION_1_8=v2.7.0
  
  #Latest version of tools
  ENV     LATEST=v1.8
  ENV     K8S_VERSION_LATEST=$K8S_VERSION_1_8
  ENV     K8S_HELM_VERSION_LATEST=$K8S_HELM_VERSION_1_8
  
negative.code:         helm registry version placeholder
  
  # Crash application
  RUN     wget -q -O crash-app.tgz https://github.com/samsung-cnct/k2-crash-application/releases/download/0.1.0/k2-crash-application_0.1.0_linux_amd64.tar.gz && \
          echo "${CRASH_APP_SHA256}  crash-app.tgz" | sha256sum -c - && \
          tar -zxvf crash-app.tgz  && \
          mv k2-crash-application /usr/bin/k2-crash-application && \
          rm -f crash-app.tgz
  
  
  # Quick verification script to confirm all expected binaries are present.
  