+#!/bin/sh
+###########################################################################
+# Copyright (c) 2019 AT&T Intellectual Property.
+# Copyright (c) 2019 Nokia.
+#
+# 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.
+##########################################################################
+
+# generate a kubconfig (at ${KUBECONFIG} file from the automatically-mounted
+# service account token.
+# ENVIRONMENT:
+# SVCACCT_NAME: the name of the service account user. default "default"
+# CLUSTER_NAME: the name of the kubernetes cluster. default "kubernetes"
+# KUBECONFIG: where the generated file will be deposited.
+SVCACCT_TOKEN=`cat /var/run/secrets/kubernetes.io/serviceaccount/token`
+CLUSTER_CA=`base64 /var/run/secrets/kubernetes.io/serviceaccount/ca.crt|tr -d '\n'`
+
+cat >${KUBECONFIG} <<__EOF__
+ApiVersion: v1
+kind: Config
+users:
+- name: ${SVCACCT_NAME:-default}
+ user:
+ token: ${SVCACCT_TOKEN}
+clusters:
+- cluster:
+ certificate-authority-data: ${CLUSTER_CA}
+ server: ${K8S_API_HOST:-https://kubernetes.default.svc.cluster.local/}
+ name: ${CLUSTER_NAME:-kubernetes}
+contexts:
+- context:
+ cluster: ${CLUSTER_NAME:-kubernetes}
+ user: ${SVCACCT_NAME:-default}
+ name: svcs-acct-context
+current-context: svcs-acct-context
+__EOF__