anchor.diff:  ##}
   FROM krkr/docker-toolbox
   
  -ENV ANSIBLE_VERSION=2.5.2.0 \
  +ENV ANSIBLE_VERSION=2.7.1.0 \
       ANSIBLE_HOST_KEY_CHECKING=False
   RUN apk --update add build-base libffi-dev \
       openssl-dev openssh-client \
  
positive.code: RUN apk --no-cache add \
        python-dev py-pip py-setuptools \
        ca-certificates gcc musl-dev linux-headers \
    && pip install --upgrade --no-cache-dir pip setuptools python-openstackclient==3.15.0 \
    && apk del gcc musl-dev linux-headers
negative.code:     pip install ansible==${ANSIBLE_VERSION} && \
      apk del build-base openssl-dev libffi-dev python-dev
  
  ENV TERRAFORM_VERSION 0.11.10
  RUN apk --update add ca-certificates && \
      curl -sSkL "https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}/terraform_${TERRAFORM_VERSION}_linux_amd64.zip" > /terraform.zip && \
      unzip /terraform.zip && rm /terraform.zip && \
      mv terraform* /usr/local/bin && \
      chmod +x /usr/local/bin/terraform*
  
  ENV PACKER_VERSION 1.3.2
  RUN wget -q "https://releases.hashicorp.com/packer/${PACKER_VERSION}/packer_${PACKER_VERSION}_linux_amd64.zip" && \
      unzip packer_${PACKER_VERSION}_linux_amd64.zip && \
      rm packer_${PACKER_VERSION}_linux_amd64.zip && \
      mv packer /usr/local/bin
  
  ENV KUBECTL_VERSION 1.12.2
  RUN curl -sSL "https://storage.googleapis.com/kubernetes-release/release/v${KUBECTL_VERSION}/bin/linux/amd64/kubectl" \
      > /usr/local/bin/kubectl && chmod +x /usr/local/bin/kubectl
  
  ENV HELM_VERSION 2.11.0
  RUN wget -q "https://kubernetes-helm.storage.googleapis.com/helm-v${HELM_VERSION}-linux-amd64.tar.gz" && \
      tar xvzf helm-v${HELM_VERSION}-linux-amd64.tar.gz && \
      rm helm-v${HELM_VERSION}-linux-amd64.tar.gz && \
  