Copy Containernetworking CNI plugins in an init container

[micahhausler]

Right now we rely on the CNI binaries being present on the host, but we should add an init container to our DaemonSet that copies CNI binaries to the host. Our AMI currently bakes these in, but this CNI provider should provide these itself

Essentially the init container Dockerfile would look need to look like

FROM amazonlinux

ENV CNI_STAGE_DIR /opt/stage/cni
ENV CNI_BIN_DIR /opt/cni/bin
RUN mkdir -p /opt/cni/bin

ENV CNI_VERSION v0.6.0
RUN wget https://github.com/containernetworking/cni/releases/download/${CNI_VERSION}/cni-amd64-${CNI_VERSION}.tgz \
    && tar -xvf cni-amd64-${CNI_VERSION}.tgz -C $CNI_STAGE_DIR \
    && rm cni-amd64-${CNI_VERSION}.tgz

ENV CNI_PLUGIN_VERSION v0.7.1 
RUN wget https://github.com/containernetworking/plugins/releases/download/${CNI_PLUGIN_VERSION}/cni-plugins-amd64-${CNI_PLUGIN_VERSION}.tgz \
    && tar -xvf cni-plugins-amd64-${CNI_PLUGIN_VERSION}.tgz -C $CNI_STAGE_DIR \
    && rm cni-plugins-amd64-${CNI_PLUGIN_VERSION}.tgz

ENTRYPOINT ["/usr/bin/cp", "-r", "$CNI_STAGE_DIR", "/opt/cni/bin"]

[mogren]

@micahhausler Fixed, only took 23 months! 😄