#!/usr/bin/env bash
# Copyright 2017 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -o errexit
set -o nounset
set -o pipefail
if LANG=C sed --help 2>&1 | grep -q GNU; then
SED="sed"
elif which gsed &>/dev/null; then
SED="gsed"
else
echo "Failed to find GNU sed as sed or gsed. If you are on Mac: brew install gnu-sed." >&2
exit 1
fi
dir=$(mktemp -d "${TMPDIR:-/tmp/}$(basename 0).XXXXXXXXXXXX")
# Register function to be called on EXIT to remove generated binary.
function cleanup {
rm -rf "${dir}"
}
trap cleanup EXIT
scriptDir=$(dirname "${BASH_SOURCE[0]}")
# this uses discovery from a kube-like API server to register ALL the API versions that server provides
# first argument is reference to kube-config file that points the API server you're adding from
# second argument is the service namespace
# third argument is the service name
# fourth argument is reference to kube-config file that points to the aggregator you're using
FROM_KUBECONFIG=${1}
SERVICE_NAMESPACE=${2}
SERVICE_NAME=${3}
AGG_KUBECONFIG=${4}
caBundle=$(base64 /var/run/kubernetes/server-ca.crt | awk 'BEGIN{ORS="";} {print}')
# if we have a /api endpoint, then we need to register that
if kubectl --kubeconfig="${FROM_KUBECONFIG}" get --raw / | grep -q /api/v1; then
group=""
version="v1"
resourceName=${version}.${group}
resourceFileName="${dir}/${resourceName}.yaml"
cp "${scriptDir}/apiservice-template.yaml" "${resourceFileName}"
${SED} -i "s/RESOURCE_NAME/${resourceName}/" "${resourceFileName}"
${SED} -i "s/API_GROUP/${group}/" "${resourceFileName}"
${SED} -i "s/API_VERSION/${version}/" "${resourceFileName}"
${SED} -i "s/SERVICE_NAMESPACE/${SERVICE_NAMESPACE}/" "${resourceFileName}"
${SED} -i "s/SERVICE_NAME/${SERVICE_NAME}/" "${resourceFileName}"
${SED} -i "s/CA_BUNDLE/${caBundle}/" "${resourceFileName}"
echo "registering ${resourceName} using ${resourceFileName}"
kubectl --kubeconfig="${AGG_KUBECONFIG}" create -f "${resourceFileName}"
fi
while IFS=$'\n' read -r groupVersion;
do groupVersions+=("$groupVersion");
done < <(kubectl get --raw / | grep /apis/ | sed 's/",.*//' | sed 's|.*"/apis/||' | grep '/')
for groupVersion in "${groupVersions[@]}"; do
group=$(echo "$groupVersion" | awk -F/ '{print $1}')
version=$(echo "$groupVersion" | awk -F/ '{print $2}')
resourceName=${version}.${group}
resourceFileName=${dir}/${resourceName}.yaml
cp "${scriptDir}/apiservice-template.yaml" "${resourceFileName}"
${SED} -i "s/RESOURCE_NAME/${resourceName}/" "${resourceFileName}"
${SED} -i "s/API_GROUP/${group}/" "${resourceFileName}"
${SED} -i "s/API_VERSION/${version}/" "${resourceFileName}"
${SED} -i "s/SERVICE_NAMESPACE/${SERVICE_NAMESPACE}/" "${resourceFileName}"
${SED} -i "s/SERVICE_NAME/${SERVICE_NAME}/" "${resourceFileName}"
${SED} -i "s/CA_BUNDLE/${caBundle}/" "${resourceFileName}"
echo "registering ${resourceName} using ${resourceFileName}"
kubectl --kubeconfig="${AGG_KUBECONFIG}" create -f "${resourceFileName}"
done
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