Hyperkube image build with RHEL7 minimal

Dockerfile

# syntax = docker/dockerfile:experimental
FROM BASEIMAGE

# Copy the hyperkube binary
COPY hyperkube /hyperkube

RUN --mount=type=bind,source=secrets,target=/run/secrets \
 ln -s /hyperkube /apiserver \
 && ln -s /hyperkube /cloud-controller-manager \
 && ln -s /hyperkube /controller-manager \
 && ln -s /hyperkube /kubectl \
 && ln -s /hyperkube /kubelet \
 && ln -s /hyperkube /proxy \
 && ln -s /hyperkube /scheduler \
 && ln -s /hyperkube /usr/local/bin/cloud-controller-manager \
 && ln -s /hyperkube /usr/local/bin/kube-apiserver \
 && ln -s /hyperkube /usr/local/bin/kube-controller-manager \
 && ln -s /hyperkube /usr/local/bin/kube-proxy \
 && ln -s /hyperkube /usr/local/bin/kube-scheduler \
 && ln -s /hyperkube /usr/local/bin/kubectl \
 && ln -s /hyperkube /usr/local/bin/kubelet \
 && echo CACHEBUST>/dev/null && \
 microdnf clean all && \
 microdnf install --enablerepo rhel-7-server-rpms --nodocs \
     hostname \
     elfutils-libs \
     ca-certificates \
     ceph-common \
     nfs-utils \
     cifs-utils \
     conntrack \
     e2fsprogs \
     xfsprogs \
     ebtables \
     ethtool \
     git \
     glusterfs-client \
     iptables \
     ipset \
     kmod \
     openssh-clients \
     socat \
     util-linux && \
 rpm -ihv http://download-ib01.fedoraproject.org/pub/epel/7/x86_64/Packages/o/oniguruma-5.9.5-3.el7.x86_64.rpm http://download-ib01.fedoraproject.org/pub/epel/7/x86_64/Packages/j/jq-1.5-1.el7.x8
6_64.rpm && \
 microdnf clean all && \
 rm -rf /var/cache/yum/*

COPY cni-bin/bin /opt/cni/bin