diff options
Diffstat (limited to 'sdc-os-chef/scripts/k8s/get_helm.sh')
| -rwxr-xr-x | sdc-os-chef/scripts/k8s/get_helm.sh | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/sdc-os-chef/scripts/k8s/get_helm.sh b/sdc-os-chef/scripts/k8s/get_helm.sh new file mode 100755 index 0000000000..79e9f35203 --- /dev/null +++ b/sdc-os-chef/scripts/k8s/get_helm.sh @@ -0,0 +1,230 @@ +#!/usr/bin/env bash + +# Copyright 2016 The Kubernetes Authors 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. + +# The install script is based off of the MIT-licensed script from glide, +# the package manager for Go: https://github.com/Masterminds/glide.sh/blob/master/get + +PROJECT_NAME="helm" + +: ${HELM_INSTALL_DIR:="/usr/local/bin"} + +# initArch discovers the architecture for this system. +initArch() { + ARCH=$(uname -m) + case $ARCH in + armv5*) ARCH="armv5";; + armv6*) ARCH="armv6";; + armv7*) ARCH="armv7";; + aarch64) ARCH="arm64";; + x86) ARCH="386";; + x86_64) ARCH="amd64";; + i686) ARCH="386";; + i386) ARCH="386";; + esac +} + +# initOS discovers the operating system for this system. +initOS() { + OS=$(echo `uname`|tr '[:upper:]' '[:lower:]') + + case "$OS" in + # Minimalist GNU for Windows + mingw*) OS='windows';; + esac +} + +# runs the given command as root (detects if we are root already) +runAsRoot() { + local CMD="$*" + + if [ $EUID -ne 0 ]; then + CMD="sudo $CMD" + fi + + $CMD +} + +# verifySupported checks that the os/arch combination is supported for +# binary builds. +verifySupported() { + local supported="darwin-386\ndarwin-amd64\nlinux-386\nlinux-amd64\nlinux-arm\nlinux-arm64\nlinux-ppc64le\nwindows-386\nwindows-amd64" + if ! echo "${supported}" | grep -q "${OS}-${ARCH}"; then + echo "No prebuilt binary for ${OS}-${ARCH}." + echo "To build from source, go to https://github.com/kubernetes/helm" + exit 1 + fi + + if ! type "curl" > /dev/null && ! type "wget" > /dev/null; then + echo "Either curl or wget is required" + exit 1 + fi +} + +# checkDesiredVersion checks if the desired version is available. +checkDesiredVersion() { + # Use the GitHub releases webpage for the project to find the desired version for this project. + local release_url="https://github.com/kubernetes/helm/releases/${DESIRED_VERSION:-latest}" + if type "curl" > /dev/null; then + TAG=$(curl -SsL $release_url | awk '/\/tag\//' | cut -d '"' -f 2 | awk '{n=split($NF,a,"/");print a[n]}' | awk 'a !~ $0{print}; {a=$0}') + elif type "wget" > /dev/null; then + TAG=$(wget -q -O - $release_url | awk '/\/tag\//' | cut -d '"' -f 2 | awk '{n=split($NF,a,"/");print a[n]}' | awk 'a !~ $0{print}; {a=$0}') + fi + if [ "x$TAG" == "x" ]; then + echo "Cannot determine ${DESIRED_VERSION} tag." + exit 1 + fi +} + +# checkHelmInstalledVersion checks which version of helm is installed and +# if it needs to be changed. +checkHelmInstalledVersion() { + if [[ -f "${HELM_INSTALL_DIR}/${PROJECT_NAME}" ]]; then + local version=$(helm version | grep '^Client' | cut -d'"' -f2) + if [[ "$version" == "$TAG" ]]; then + echo "Helm ${version} is already ${DESIRED_VERSION:-latest}" + return 0 + else + echo "Helm ${TAG} is available. Changing from version ${version}." + return 1 + fi + else + return 1 + fi +} + +# downloadFile downloads the latest binary package and also the checksum +# for that binary. +downloadFile() { + HELM_DIST="helm-$TAG-$OS-$ARCH.tar.gz" + DOWNLOAD_URL="https://kubernetes-helm.storage.googleapis.com/$HELM_DIST" + CHECKSUM_URL="$DOWNLOAD_URL.sha256" + HELM_TMP_ROOT="$(mktemp -dt helm-installer-XXXXXX)" + HELM_TMP_FILE="$HELM_TMP_ROOT/$HELM_DIST" + HELM_SUM_FILE="$HELM_TMP_ROOT/$HELM_DIST.sha256" + echo "Downloading $DOWNLOAD_URL" + if type "curl" > /dev/null; then + curl -SsL "$CHECKSUM_URL" -o "$HELM_SUM_FILE" + elif type "wget" > /dev/null; then + wget -q -O "$HELM_SUM_FILE" "$CHECKSUM_URL" + fi + if type "curl" > /dev/null; then + curl -SsL "$DOWNLOAD_URL" -o "$HELM_TMP_FILE" + elif type "wget" > /dev/null; then + wget -q -O "$HELM_TMP_FILE" "$DOWNLOAD_URL" + fi +} + +# installFile verifies the SHA256 for the file, then unpacks and +# installs it. +installFile() { + HELM_TMP="$HELM_TMP_ROOT/$PROJECT_NAME" + local sum=$(openssl sha1 -sha256 ${HELM_TMP_FILE} | awk '{print $2}') + local expected_sum=$(cat ${HELM_SUM_FILE}) + if [ "$sum" != "$expected_sum" ]; then + echo "SHA sum of $HELM_TMP does not match. Aborting." + exit 1 + fi + + mkdir -p "$HELM_TMP" + tar xf "$HELM_TMP_FILE" -C "$HELM_TMP" + HELM_TMP_BIN="$HELM_TMP/$OS-$ARCH/$PROJECT_NAME" + echo "Preparing to install into ${HELM_INSTALL_DIR}" + runAsRoot cp "$HELM_TMP_BIN" "$HELM_INSTALL_DIR" +} + +# fail_trap is executed if an error occurs. +fail_trap() { + result=$? + if [ "$result" != "0" ]; then + if [[ -n "$INPUT_ARGUMENTS" ]]; then + echo "Failed to install $PROJECT_NAME with the arguments provided: $INPUT_ARGUMENTS" + help + else + echo "Failed to install $PROJECT_NAME" + fi + echo -e "\tFor support, go to https://github.com/kubernetes/helm." + fi + cleanup + exit $result +} + +# testVersion tests the installed client to make sure it is working. +testVersion() { + set +e + echo "$PROJECT_NAME installed into $HELM_INSTALL_DIR/$PROJECT_NAME" + HELM="$(which $PROJECT_NAME)" + if [ "$?" = "1" ]; then + echo "$PROJECT_NAME not found. Is $HELM_INSTALL_DIR on your "'$PATH?' + exit 1 + fi + set -e + echo "Run '$PROJECT_NAME init' to configure $PROJECT_NAME." +} + +# help provides possible cli installation arguments +help () { + echo "Accepted cli arguments are:" + echo -e "\t[--help|-h ] ->> prints this help" + echo -e "\t[--version|-v <desired_version>] . When not defined it defaults to latest" + echo -e "\te.g. --version v2.4.0 or -v latest" +} + +# cleanup temporary files to avoid https://github.com/kubernetes/helm/issues/2977 +cleanup() { + rm -rf "$HELM_TMP_ROOT" +} + +# Execution + +#Stop execution on any error +trap "fail_trap" EXIT +set -e + +# Parsing input arguments (if any) +export INPUT_ARGUMENTS="${@}" +set -u +while [[ $# -gt 0 ]]; do + case $1 in + '--version'|-v) + shift + if [[ $# -ne 0 ]]; then + export DESIRED_VERSION="${1}" + else + echo -e "Please provide the desired version. e.g. --version v2.4.0 or -v latest" + exit 0 + fi + ;; + '--help'|-h) + help + exit 0 + ;; + *) exit 1 + ;; + esac + shift +done +set +u + +initArch +initOS +verifySupported +checkDesiredVersion +if ! checkHelmInstalledVersion; then + downloadFile + installFile +fi +testVersion +cleanup |