Dockerfile

FROM alpine:3.7

ENV KUBE_VERSION="v1.11.2"
ENV ANSIBLE_VERSION="2.5.0"
ENV TERRAFORM_VERSION="0.11.8"

# install kubectl
RUN set -ex \
    && apk add --update ca-certificates \
    && apk add --update -t deps curl \
    && curl -L https://storage.googleapis.com/kubernetes-release/release/${KUBE_VERSION}/bin/linux/amd64/kubectl -o /usr/local/bin/kubectl \
    && chmod +x /usr/local/bin/kubectl

# install ansible
RUN set -ex \
    && apk add --no-cache py-pip build-base python-dev libffi-dev openssl-dev \
    && pip install ansible

# install terraform
RUN set -ex \
    && apk add --no-cache unzip \
    && curl -L https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}/terraform_${TERRAFORM_VERSION}_linux_amd64.zip -o /tmp/terraform_${TERRAFORM_VERSION}_linux_amd64.zip \
    && unzip /tmp/terraform_${TERRAFORM_VERSION}_linux_amd64.zip -d /usr/local/bin

# cleanup
RUN apk del --purge deps \
    && rm /var/cache/apk/* \
    && rm -rf /tmp/* \
    && rm -rf /var/cache/apk/* \
    && rm -rf /var/tmp/*

WORKDIR /root
ENTRYPOINT ["kubectl"]
CMD ["help"]