mirror of https://github.com/k3s-io/k3s
207 lines
8.1 KiB
Bash
207 lines
8.1 KiB
Bash
#!/bin/bash
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# Copyright 2016 The Kubernetes Authors.
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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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# Due to the GCE custom metadata size limit, we split the entire script into two
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# files configure.sh and configure-helper.sh. The functionality of downloading
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# kubernetes configuration, manifests, docker images, and binary files are
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# put in configure.sh, which is uploaded via GCE custom metadata.
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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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function set-broken-motd {
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cat > /etc/motd <<EOF
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Broken (or in progress) Kubernetes node setup! Check the cluster initialization status
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using the following commands.
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Master instance:
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- sudo systemctl status kube-master-installation
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- sudo systemctl status kube-master-configuration
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Node instance:
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- sudo systemctl status kube-node-installation
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- sudo systemctl status kube-node-configuration
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EOF
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}
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function download-kube-env {
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# Fetch kube-env from GCE metadata server.
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local -r tmp_kube_env="/tmp/kube-env.yaml"
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curl --fail --retry 5 --retry-delay 3 --silent --show-error \
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-H "X-Google-Metadata-Request: True" \
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-o "${tmp_kube_env}" \
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http://metadata.google.internal/computeMetadata/v1/instance/attributes/kube-env
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# Convert the yaml format file into a shell-style file.
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eval $(python -c '''
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import pipes,sys,yaml
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for k,v in yaml.load(sys.stdin).iteritems():
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print("readonly {var}={value}".format(var = k, value = pipes.quote(str(v))))
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''' < "${tmp_kube_env}" > "${KUBE_HOME}/kube-env")
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rm -f "${tmp_kube_env}"
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}
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function validate-hash {
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local -r file="$1"
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local -r expected="$2"
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actual=$(sha1sum ${file} | awk '{ print $1 }') || true
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if [[ "${actual}" != "${expected}" ]]; then
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echo "== ${file} corrupted, sha1 ${actual} doesn't match expected ${expected} =="
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return 1
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fi
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}
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# Retry a download until we get it. Takes a hash and a set of URLs.
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#
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# $1 is the sha1 of the URL. Can be "" if the sha1 is unknown.
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# $2+ are the URLs to download.
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function download-or-bust {
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local -r hash="$1"
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shift 1
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local -r urls=( $* )
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while true; do
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for url in "${urls[@]}"; do
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local file="${url##*/}"
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rm -f "${file}"
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if ! curl -f --ipv4 -Lo "${file}" --connect-timeout 20 --max-time 300 --retry 6 --retry-delay 10 "${url}"; then
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echo "== Failed to download ${url}. Retrying. =="
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elif [[ -n "${hash}" ]] && ! validate-hash "${file}" "${hash}"; then
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echo "== Hash validation of ${url} failed. Retrying. =="
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else
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if [[ -n "${hash}" ]]; then
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echo "== Downloaded ${url} (SHA1 = ${hash}) =="
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else
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echo "== Downloaded ${url} =="
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fi
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return
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fi
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done
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done
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}
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function split-commas {
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echo $1 | tr "," "\n"
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}
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# Downloads kubernetes binaries and kube-system manifest tarball, unpacks them,
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# and places them into suitable directories. Files are placed in /home/kubernetes.
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function install-kube-binary-config {
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cd "${KUBE_HOME}"
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local -r server_binary_tar_urls=( $(split-commas "${SERVER_BINARY_TAR_URL}") )
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local -r server_binary_tar="${server_binary_tar_urls[0]##*/}"
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if [[ -n "${SERVER_BINARY_TAR_HASH:-}" ]]; then
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local -r server_binary_tar_hash="${SERVER_BINARY_TAR_HASH}"
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else
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echo "Downloading binary release sha1 (not found in env)"
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download-or-bust "" "${server_binary_tar_urls[@]/.tar.gz/.tar.gz.sha1}"
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local -r server_binary_tar_hash=$(cat "${server_binary_tar}.sha1")
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fi
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echo "Downloading binary release tar"
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download-or-bust "${server_binary_tar_hash}" "${server_binary_tar_urls[@]}"
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tar xzf "${KUBE_HOME}/${server_binary_tar}" -C "${KUBE_HOME}" --overwrite
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# Copy docker_tag and image files to ${KUBE_HOME}/kube-docker-files.
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src_dir="${KUBE_HOME}/kubernetes/server/bin"
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dst_dir="${KUBE_HOME}/kube-docker-files"
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mkdir -p "${dst_dir}"
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cp "${src_dir}/"*.docker_tag "${dst_dir}"
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if [[ "${KUBERNETES_MASTER:-}" == "false" ]]; then
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cp "${src_dir}/kube-proxy.tar" "${dst_dir}"
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else
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cp "${src_dir}/kube-apiserver.tar" "${dst_dir}"
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cp "${src_dir}/kube-controller-manager.tar" "${dst_dir}"
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cp "${src_dir}/kube-scheduler.tar" "${dst_dir}"
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cp -r "${KUBE_HOME}/kubernetes/addons" "${dst_dir}"
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fi
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local -r kube_bin="${KUBE_HOME}/bin"
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# If the built-in binary version is different from the expected version, we use
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# the downloaded binary. The simplest implementation is to always use the downloaded
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# binary without checking the version. But we have another version guardian in GKE.
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# So, we compare the versions to ensure this run-time binary replacement is only
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# applied for OSS kubernetes.
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cp "${src_dir}/kubelet" "${kube_bin}"
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local -r builtin_version="$(/usr/bin/kubelet --version=true | cut -f2 -d " ")"
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local -r required_version="$(/home/kubernetes/bin/kubelet --version=true | cut -f2 -d " ")"
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if [[ "${TEST_CLUSTER:-}" == "true" ]] || \
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[[ "${builtin_version}" != "${required_version}" ]]; then
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cp "${src_dir}/kubectl" "${kube_bin}"
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chmod 755 "${kube_bin}/kubelet"
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chmod 755 "${kube_bin}/kubectl"
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mount --bind "${kube_bin}/kubelet" /usr/bin/kubelet
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mount --bind "${kube_bin}/kubectl" /usr/bin/kubectl
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else
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rm -f "${kube_bin}/kubelet"
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fi
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if [[ "${NETWORK_PROVIDER:-}" == "kubenet" ]] || \
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[[ "${NETWORK_PROVIDER:-}" == "cni" ]]; then
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#TODO(andyzheng0831): We should make the cni version number as a k8s env variable.
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local -r cni_tar="cni-8a936732094c0941e1543ef5d292a1f4fffa1ac5.tar.gz"
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download-or-bust "" "https://storage.googleapis.com/kubernetes-release/network-plugins/${cni_tar}"
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tar xzf "${KUBE_HOME}/${cni_tar}" -C "${kube_bin}" --overwrite
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mv "${kube_bin}/bin"/* "${kube_bin}"
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rmdir "${kube_bin}/bin"
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rm -f "${KUBE_HOME}/${cni_tar}"
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fi
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mv "${KUBE_HOME}/kubernetes/LICENSES" "${KUBE_HOME}"
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mv "${KUBE_HOME}/kubernetes/kubernetes-src.tar.gz" "${KUBE_HOME}"
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# Put kube-system pods manifests in ${KUBE_HOME}/kube-manifests/.
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dst_dir="${KUBE_HOME}/kube-manifests"
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mkdir -p "${dst_dir}"
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local -r manifests_tar_urls=( $(split-commas "${KUBE_MANIFESTS_TAR_URL}") )
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local -r manifests_tar="${manifests_tar_urls[0]##*/}"
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if [ -n "${KUBE_MANIFESTS_TAR_HASH:-}" ]; then
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local -r manifests_tar_hash="${KUBE_MANIFESTS_TAR_HASH}"
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else
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echo "Downloading k8s manifests sha1 (not found in env)"
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download-or-bust "" "${manifests_tar_urls[@]/.tar.gz/.tar.gz.sha1}"
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local -r manifests_tar_hash=$(cat "${manifests_tar}.sha1")
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fi
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echo "Downloading k8s manifests tar"
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download-or-bust "${manifests_tar_hash}" "${manifests_tar_urls[@]}"
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tar xzf "${KUBE_HOME}/${manifests_tar}" -C "${dst_dir}" --overwrite
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local -r kube_addon_registry="${KUBE_ADDON_REGISTRY:-gcr.io/google_containers}"
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if [[ "${kube_addon_registry}" != "gcr.io/google_containers" ]]; then
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find "${dst_dir}" -name \*.yaml -or -name \*.yaml.in | \
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xargs sed -ri "s@(image:\s.*)gcr.io/google_containers@\1${kube_addon_registry}@"
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find "${dst_dir}" -name \*.manifest -or -name \*.json | \
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xargs sed -ri "s@(image\":\s+\")gcr.io/google_containers@\1${kube_addon_registry}@"
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fi
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cp "${dst_dir}/kubernetes/gci-trusty/gci-configure-helper.sh" "${KUBE_HOME}/bin/configure-helper.sh"
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cp "${dst_dir}/kubernetes/gci-trusty/health-monitor.sh" "${KUBE_HOME}/bin/health-monitor.sh"
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chmod 544 "${KUBE_HOME}/bin/configure-helper.sh"
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chmod 544 "${KUBE_HOME}/bin/health-monitor.sh"
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# Clean up.
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rm -rf "${KUBE_HOME}/kubernetes"
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rm -f "${KUBE_HOME}/${server_binary_tar}"
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rm -f "${KUBE_HOME}/${server_binary_tar}.sha1"
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rm -f "${KUBE_HOME}/${manifests_tar}"
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rm -f "${KUBE_HOME}/${manifests_tar}.sha1"
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}
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######### Main Function ##########
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echo "Start to install kubernetes files"
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set-broken-motd
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KUBE_HOME="/home/kubernetes"
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download-kube-env
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source "${KUBE_HOME}/kube-env"
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install-kube-binary-config
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echo "Done for installing kubernetes files"
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