FROM alpine:3.9

ENV CNI_DIR=/cni-plugins-amd64
ENV CNI_VER=v0.8.0

RUN mkdir $CNI_DIR

ADD https://github.com/containernetworking/plugins/releases/download/${CNI_VER}/cni-plugins-linux-amd64-${CNI_VER}.tgz .
RUN tar -xf cni-plugins-linux-amd64-${CNI_VER}.tgz -C $CNI_DIR && \
rm /cni-plugins-linux-amd64-${CNI_VER}.tgz