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104 lines
4.3 KiB
Bash
104 lines
4.3 KiB
Bash
#!/bin/bash
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# Copyright 2015 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Common utilites for kube-up/kube-down
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set -o errexit
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set -o nounset
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set -o pipefail
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KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
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# Generate kubeconfig data for the created cluster.
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# Assumed vars:
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# KUBE_USER
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# KUBE_PASSWORD
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# KUBE_MASTER_IP
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# KUBECONFIG
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#
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# KUBE_CERT
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# KUBE_KEY
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# CA_CERT
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# CONTEXT
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function create-kubeconfig() {
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local kubectl="${KUBE_ROOT}/cluster/kubectl.sh"
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# KUBECONFIG determines the file we write to, but it may not exist yet
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if [[ ! -e "${KUBECONFIG}" ]]; then
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mkdir -p $(dirname "${KUBECONFIG}")
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touch "${KUBECONFIG}"
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fi
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"${kubectl}" config set-cluster "${CONTEXT}" --server="https://${KUBE_MASTER_IP}" \
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--certificate-authority="${CA_CERT}" \
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--embed-certs=true
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"${kubectl}" config set-credentials "${CONTEXT}" --username="${KUBE_USER}" \
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--password="${KUBE_PASSWORD}" \
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--client-certificate="${KUBE_CERT}" \
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--client-key="${KUBE_KEY}" \
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--embed-certs=true
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"${kubectl}" config set-context "${CONTEXT}" --cluster="${CONTEXT}" --user="${CONTEXT}"
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"${kubectl}" config use-context "${CONTEXT}" --cluster="${CONTEXT}"
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echo "Wrote config for ${CONTEXT} to ${KUBECONFIG}"
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}
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# Clear kubeconfig data for a context
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# Assumed vars:
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# KUBECONFIG
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# CONTEXT
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function clear-kubeconfig() {
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local kubectl="${KUBE_ROOT}/cluster/kubectl.sh"
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"${kubectl}" config unset "clusters.${CONTEXT}"
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"${kubectl}" config unset "users.${CONTEXT}"
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"${kubectl}" config unset "contexts.${CONTEXT}"
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local current
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current=$("${kubectl}" config view -o template --template='{{ index . "current-context" }}')
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if [[ "${current}" == "${CONTEXT}" ]]; then
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"${kubectl}" config unset current-context
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fi
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echo "Cleared config for ${CONTEXT} from ${KUBECONFIG}"
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}
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# Gets username, password for the current-context in kubeconfig, if they exist.
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# Assumed vars:
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# KUBECONFIG # if unset, defaults to global
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#
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# Vars set:
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# KUBE_USER
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# KUBE_PASSWORD
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#
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# KUBE_USER,KUBE_PASSWORD will be empty if no current-context is set, or
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# the current-context user does not exist or contain basicauth entries.
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function get-kubeconfig-basicauth() {
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# Templates to safely extract the username,password for the current-context
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# user. The long chain of 'with' commands avoids indexing nil if any of the
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# entries ("current-context", "contexts"."current-context", "users", etc)
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# is missing.
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# Note: we save dot ('.') to $root because the 'with' action overrides it.
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# See http://golang.org/pkg/text/template/.
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local username='{{$dot := .}}{{with $ctx := index $dot "current-context"}}{{range $element := (index $dot "contexts")}}{{ if eq .name $ctx }}{{ with $user := .context.user }}{{range $element := (index $dot "users")}}{{ if eq .name $user }}{{ index . "user" "username" }}{{end}}{{end}}{{end}}{{end}}{{end}}{{end}}'
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local password='{{$dot := .}}{{with $ctx := index $dot "current-context"}}{{range $element := (index $dot "contexts")}}{{ if eq .name $ctx }}{{ with $user := .context.user }}{{range $element := (index $dot "users")}}{{ if eq .name $user }}{{ index . "user" "password" }}{{end}}{{end}}{{end}}{{end}}{{end}}{{end}}'
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KUBE_USER=$("${KUBE_ROOT}/cluster/kubectl.sh" config view -o template --template="${username}")
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KUBE_PASSWORD=$("${KUBE_ROOT}/cluster/kubectl.sh" config view -o template --template="${password}")
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# Handle empty/missing username|password
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if [[ "${KUBE_USER}" == '<no value>' || "$KUBE_PASSWORD" == '<no value>' ]]; then
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KUBE_USER=''
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KUBE_PASSWORD=''
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fi
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}
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