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configure.sh
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configure.sh
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#!/bin/bash
# Copyright 2016 The Kubernetes Authors.
#
# 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.
# Due to the GCE custom metadata size limit, we split the entire script into two
# files configure.sh and configure-helper.sh. The functionality of downloading
# kubernetes configuration, manifests, docker images, and binary files are
# put in configure.sh, which is uploaded via GCE custom metadata.
set -o errexit
set -o nounset
set -o pipefail
function set-broken-motd {
cat > /etc/motd <<EOF
Broken (or in progress) Kubernetes node setup! Check the cluster initialization status
using the following commands.
Master instance:
- sudo systemctl status kube-master-installation
- sudo systemctl status kube-master-configuration
Node instance:
- sudo systemctl status kube-node-installation
- sudo systemctl status kube-node-configuration
EOF
}
function download-kube-env {
# Fetch kube-env from GCE metadata server.
local -r tmp_kube_env="/tmp/kube-env.yaml"
curl --fail --retry 5 --retry-delay 3 --silent --show-error \
-H "X-Google-Metadata-Request: True" \
-o "${tmp_kube_env}" \
http://metadata.google.internal/computeMetadata/v1/instance/attributes/kube-env
# Convert the yaml format file into a shell-style file.
eval $(python -c '''
import pipes,sys,yaml
for k,v in yaml.load(sys.stdin).iteritems():
print("readonly {var}={value}".format(var = k, value = pipes.quote(str(v))))
''' < "${tmp_kube_env}" > "${KUBE_HOME}/kube-env")
rm -f "${tmp_kube_env}"
}
function validate-hash {
local -r file="$1"
local -r expected="$2"
actual=$(sha1sum ${file} | awk '{ print $1 }') || true
if [[ "${actual}" != "${expected}" ]]; then
echo "== ${file} corrupted, sha1 ${actual} doesn't match expected ${expected} =="
return 1
fi
}
# Retry a download until we get it. Takes a hash and a set of URLs.
#
# $1 is the sha1 of the URL. Can be "" if the sha1 is unknown.
# $2+ are the URLs to download.
function download-or-bust {
local -r hash="$1"
shift 1
local -r urls=( $* )
while true; do
for url in "${urls[@]}"; do
local file="${url##*/}"
rm -f "${file}"
if ! curl -f --ipv4 -Lo "${file}" --connect-timeout 20 --max-time 300 --retry 6 --retry-delay 10 "${url}"; then
echo "== Failed to download ${url}. Retrying. =="
elif [[ -n "${hash}" ]] && ! validate-hash "${file}" "${hash}"; then
echo "== Hash validation of ${url} failed. Retrying. =="
else
if [[ -n "${hash}" ]]; then
echo "== Downloaded ${url} (SHA1 = ${hash}) =="
else
echo "== Downloaded ${url} =="
fi
return
fi
done
done
}
function split-commas {
echo $1 | tr "," "\n"
}
function install-gci-mounter-tools {
local -r rkt_version="v1.18.0"
local -r gci_mounter_version="v2"
local -r rkt_binary_sha1="75fc8f29c79bc9e505f3e7f6e8fadf2425c21967"
local -r rkt_stage1_fly_sha1="474df5a1f934960ba669b360ab713d0a54283091"
local -r gci_mounter_sha1="851e841d8640d6a05e64e22c493f5ac3c4cba561"
download-or-bust "${rkt_binary_sha1}" "https://storage.googleapis.com/kubernetes-release/rkt/${rkt_version}/rkt"
download-or-bust "${rkt_stage1_fly_sha1}" "https://storage.googleapis.com/kubernetes-release/rkt/${rkt_version}/stage1-fly.aci"
download-or-bust "${gci_mounter_sha1}" "https://storage.googleapis.com/kubernetes-release/gci-mounter/gci-mounter-${gci_mounter_version}.aci"
local -r rkt_dst="${KUBE_HOME}/bin/"
mv "${KUBE_HOME}/rkt" "${rkt_dst}/rkt"
mv "${KUBE_HOME}/stage1-fly.aci" "${rkt_dst}/stage1-fly.aci"
mv "${KUBE_HOME}/gci-mounter-${gci_mounter_version}.aci" "${rkt_dst}/gci-mounter-${gci_mounter_version}.aci"
chmod a+x "${rkt_dst}/rkt"
}
# Downloads kubernetes binaries and kube-system manifest tarball, unpacks them,
# and places them into suitable directories. Files are placed in /home/kubernetes.
function install-kube-binary-config {
cd "${KUBE_HOME}"
local -r server_binary_tar_urls=( $(split-commas "${SERVER_BINARY_TAR_URL}") )
local -r server_binary_tar="${server_binary_tar_urls[0]##*/}"
if [[ -n "${SERVER_BINARY_TAR_HASH:-}" ]]; then
local -r server_binary_tar_hash="${SERVER_BINARY_TAR_HASH}"
else
echo "Downloading binary release sha1 (not found in env)"
download-or-bust "" "${server_binary_tar_urls[@]/.tar.gz/.tar.gz.sha1}"
local -r server_binary_tar_hash=$(cat "${server_binary_tar}.sha1")
fi
echo "Downloading binary release tar"
download-or-bust "${server_binary_tar_hash}" "${server_binary_tar_urls[@]}"
tar xzf "${KUBE_HOME}/${server_binary_tar}" -C "${KUBE_HOME}" --overwrite
# Copy docker_tag and image files to ${KUBE_HOME}/kube-docker-files.
src_dir="${KUBE_HOME}/kubernetes/server/bin"
dst_dir="${KUBE_HOME}/kube-docker-files"
mkdir -p "${dst_dir}"
cp "${src_dir}/"*.docker_tag "${dst_dir}"
if [[ "${KUBERNETES_MASTER:-}" == "false" ]]; then
cp "${src_dir}/kube-proxy.tar" "${dst_dir}"
else
cp "${src_dir}/kube-apiserver.tar" "${dst_dir}"
cp "${src_dir}/kube-controller-manager.tar" "${dst_dir}"
cp "${src_dir}/kube-scheduler.tar" "${dst_dir}"
cp -r "${KUBE_HOME}/kubernetes/addons" "${dst_dir}"
fi
local -r kube_bin="${KUBE_HOME}/bin"
mv "${src_dir}/kubelet" "${kube_bin}"
mv "${src_dir}/kubectl" "${kube_bin}"
if [[ "${NETWORK_PROVIDER:-}" == "kubenet" ]] || \
[[ "${NETWORK_PROVIDER:-}" == "cni" ]]; then
#TODO(andyzheng0831): We should make the cni version number as a k8s env variable.
local -r cni_tar="cni-07a8a28637e97b22eb8dfe710eeae1344f69d16e.tar.gz"
local -r cni_sha1="19d49f7b2b99cd2493d5ae0ace896c64e289ccbb"
download-or-bust "${cni_sha1}" "https://storage.googleapis.com/kubernetes-release/network-plugins/${cni_tar}"
local -r cni_dir="${KUBE_HOME}/cni"
mkdir -p "${cni_dir}"
tar xzf "${KUBE_HOME}/${cni_tar}" -C "${cni_dir}" --overwrite
mv "${cni_dir}/bin"/* "${kube_bin}"
rmdir "${cni_dir}/bin"
rm -f "${KUBE_HOME}/${cni_tar}"
fi
mv "${KUBE_HOME}/kubernetes/LICENSES" "${KUBE_HOME}"
mv "${KUBE_HOME}/kubernetes/kubernetes-src.tar.gz" "${KUBE_HOME}"
# Put kube-system pods manifests in ${KUBE_HOME}/kube-manifests/.
dst_dir="${KUBE_HOME}/kube-manifests"
mkdir -p "${dst_dir}"
local -r manifests_tar_urls=( $(split-commas "${KUBE_MANIFESTS_TAR_URL}") )
local -r manifests_tar="${manifests_tar_urls[0]##*/}"
if [ -n "${KUBE_MANIFESTS_TAR_HASH:-}" ]; then
local -r manifests_tar_hash="${KUBE_MANIFESTS_TAR_HASH}"
else
echo "Downloading k8s manifests sha1 (not found in env)"
download-or-bust "" "${manifests_tar_urls[@]/.tar.gz/.tar.gz.sha1}"
local -r manifests_tar_hash=$(cat "${manifests_tar}.sha1")
fi
echo "Downloading k8s manifests tar"
download-or-bust "${manifests_tar_hash}" "${manifests_tar_urls[@]}"
tar xzf "${KUBE_HOME}/${manifests_tar}" -C "${dst_dir}" --overwrite
local -r kube_addon_registry="${KUBE_ADDON_REGISTRY:-gcr.io/google_containers}"
if [[ "${kube_addon_registry}" != "gcr.io/google_containers" ]]; then
find "${dst_dir}" -name \*.yaml -or -name \*.yaml.in | \
xargs sed -ri "s@(image:\s.*)gcr.io/google_containers@\1${kube_addon_registry}@"
find "${dst_dir}" -name \*.manifest -or -name \*.json | \
xargs sed -ri "s@(image\":\s+\")gcr.io/google_containers@\1${kube_addon_registry}@"
fi
cp "${dst_dir}/kubernetes/gci-trusty/gci-configure-helper.sh" "${KUBE_HOME}/bin/configure-helper.sh"
cp "${dst_dir}/kubernetes/gci-trusty/gci-mounter" "${KUBE_HOME}/bin/mounter"
cp "${dst_dir}/kubernetes/gci-trusty/health-monitor.sh" "${KUBE_HOME}/bin/health-monitor.sh"
chmod -R 755 "${kube_bin}"
# Install gci mounter related artifacts to allow mounting storage volumes in GCI
install-gci-mounter-tools
# Clean up.
rm -rf "${KUBE_HOME}/kubernetes"
rm -f "${KUBE_HOME}/${server_binary_tar}"
rm -f "${KUBE_HOME}/${server_binary_tar}.sha1"
rm -f "${KUBE_HOME}/${manifests_tar}"
rm -f "${KUBE_HOME}/${manifests_tar}.sha1"
}
######### Main Function ##########
echo "Start to install kubernetes files"
set-broken-motd
KUBE_HOME="/home/kubernetes"
download-kube-env
source "${KUBE_HOME}/kube-env"
install-kube-binary-config
echo "Done for installing kubernetes files"