Utilities to create and clear kubeconfig for use by kube-up scripts

cluster/common.sh

+#!/bin/bash
+
+# Copyright 2015 Google Inc. All rights reserved.
+#
+# 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.
+
+# Common utilites for kube-up/kube-down
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
+
+# Generate kubeconfig data for the created cluster.
+# Assumed vars:
+#   KUBE_USER
+#   KUBE_PASSWORD
+#   KUBE_MASTER_IP
+#   KUBECONFIG
+#
+#   KUBE_CERT
+#   KUBE_KEY
+#   CA_CERT
+#   CONTEXT
+function create-kubeconfig() {
+  local kubectl="${KUBE_ROOT}/cluster/kubectl.sh"
+
+  # We expect KUBECONFIG to be defined, which determines the file we write to.
+  "${kubectl}" config set-cluster "${CONTEXT}" --server="https://${KUBE_MASTER_IP}" \
+                                               --certificate-authority="${CA_CERT}" \
+                                               --embed-certs=true
+  "${kubectl}" config set-credentials "${CONTEXT}" --username="${KUBE_USER}" \
+                                                --password="${KUBE_PASSWORD}" \
+                                                --client-certificate="${KUBE_CERT}" \
+                                                --client-key="${KUBE_KEY}" \
+                                                --embed-certs=true
+  "${kubectl}" config set-context "${CONTEXT}" --cluster="${CONTEXT}" --user="${CONTEXT}"
+  "${kubectl}" config use-context "${CONTEXT}"  --cluster="${CONTEXT}"
+
+   echo "Wrote config for ${CONTEXT} to ${KUBE_ROOT}/.kubeconfig"
+}
+
+# Clear kubeconfig data for a context
+# Assumed vars:
+#   KUBECONFIG
+#   CONTEXT
+function clear-kubeconfig() {
+  local kubectl="${KUBE_ROOT}/cluster/kubectl.sh"
+  "${kubectl}" config unset "clusters.${CONTEXT}"
+  "${kubectl}" config unset "users.${CONTEXT}"
+  "${kubectl}" config unset "contexts.${CONTEXT}"
+
+  local current
+  current=$("${kubectl}" config view -o template --template='{{ index . "current-context" }}')
+  if [[ "${current}" == "${CONTEXT}" ]]; then
+    "${kubectl}" config unset current-context
+  fi
+
+  echo "Cleared config for ${CONTEXT} from ${KUBE_ROOT}/.kubeconfig"
+}