A script that is able to fetch the latest docker images from the Kubernetes CI uploads

fetch-k8s-ci-images.sh

#!/bin/bash

CI_COMMIT=${CI_COMMIT:-latest}
ARCH=${ARCH:-amd64}
REGISTRY=${REGISTRY:-gcr.io/google_containers}

if [[ ${CI_COMMIT} == "latest" ]]; then
	CI_COMMIT=$(curl -sSL https://dl.k8s.io/ci-cross/latest.txt)
fi
ARCH_EXT="-${ARCH}"
if [[ ${ARCH} == "amd64" ]]; then
	ARCH_EXT=""
fi

CI_IMAGE_TAG=$(echo ${CI_COMMIT} | sed "s/+/_/")
IMAGE_TAG=$(echo ${CI_COMMIT} | sed "s/+/-/")

echo "Using commit: ${CI_COMMIT}"

images=(
	cloud-controller-manager
	kube-apiserver
	kube-scheduler
	kube-controller-manager
	kube-proxy
)

for image in ${images[@]}; do
	curl -sSL https://dl.k8s.io/ci-cross/${CI_COMMIT}/bin/linux/${ARCH}/${image}.tar | docker load
	docker tag gcr.io/google_containers/${image}${ARCH_EXT}:${CI_IMAGE_TAG} gcr.io/google_containers/${image}-${ARCH}:${IMAGE_TAG}
	docker rmi gcr.io/google_containers/${image}${ARCH_EXT}:${CI_IMAGE_TAG}
	echo "Image pulled: ${REGISTRY}/${image}-${ARCH}:${IMAGE_TAG}"
done

cat <<EOF
Now you can run:
	kubeadm init --use-kubernetes-version ${IMAGE_TAG}
EOF