#!/usr/bin/env 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
### Hardcoded constants
DEFAULT_CNI_VERSION='v1.6.0'
DEFAULT_CNI_HASH='3d9f34a43e0550d9f4f28c724e25bc5cfcfc601c329586bafe4910c3c72f918055151066e71e14e157276138e358344a1d815d957646df43a86d3673ab2849c3'
DEFAULT_NPD_VERSION='v0.8.20'
DEFAULT_NPD_HASH_AMD64='09029b62f8023885f3a856c20b5fafecabb880806467848ae25f578c4ee6afacd97c85a0c2d0c582c8d79d3716c83d0e7d324073c5816ae5a812812a6f21450b'
DEFAULT_NPD_HASH_ARM64='233f7e4451de920b7ce8b0ac0e46da1a07ef559e628a75746ce7927492a1886ebd007875f76462d2d0bf3b1dc807a7e8321108cafbd7db9eee39c0e2cfb6c051'
DEFAULT_CRICTL_VERSION='v1.31.1'
DEFAULT_CRICTL_AMD64_SHA512='831ee7b3589197dbee399973793e0750e9870cd963e0d6c57eca9231fbc366c2e683855cdcabede33acdb56c15161cc9d40d5a01ec2de8cfee21ba8aa8adba54'
DEFAULT_CRICTL_ARM64_SHA512='4d12cf190c03d03d86a1a10b93abbbcb4857d013b62a601b17d767d2397d3e17f7c93d3d32b54cc1ac80262c0837afa5f34c88a58bf52d93e5cfc330dd83218c'
DEFAULT_MOUNTER_TAR_SHA='7956fd42523de6b3107ddc3ce0e75233d2fcb78436ff07a1389b6eaac91fb2b1b72a08f7a219eaf96ba1ca4da8d45271002e0d60e0644e796c665f99bb356516'
AUTH_PROVIDER_GCP_HASH_LINUX_AMD64="${AUTH_PROVIDER_GCP_HASH_LINUX_AMD64:-156058e5b3994cba91c23831774033e0d505d6d8b80f43541ef6af91b320fd9dfaabe42ec8a8887b51d87104c2b57e1eb895649d681575ffc80dd9aee8e563db}"
AUTH_PROVIDER_GCP_HASH_LINUX_ARM64="${AUTH_PROVIDER_GCP_HASH_LINUX_ARM64:-1aa3b0bea10a9755231989ffc150cbfa770f1d96932db7535473f7bfeb1108bafdae80202ae738d59495982512e716ff7366d5f414d0e76dd50519f98611f9ab}"
###
# Standard curl flags.
CURL_FLAGS='--fail --silent --show-error --retry 5 --retry-delay 3 --connect-timeout 10 --retry-connrefused'
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
}
# A function that fetches a GCE metadata value and echoes it out.
# Args:
# $1 : URL path after /computeMetadata/v1/ (without heading slash).
# $2 : An optional default value to echo out if the fetch fails.
#
# NOTE: this function is duplicated in configure-helper.sh, any changes here
# should be duplicated there as well.
function get-metadata-value {
local default="${2:-}"
local status
# shellcheck disable=SC2086
curl ${CURL_FLAGS} \
-H 'Metadata-Flavor: Google' \
"http://metadata/computeMetadata/v1/${1}" \
|| status="$?"
status="${status:-0}"
if [[ "${status}" -eq 0 || -z "${default}" ]]; then
return "${status}"
else
echo "${default}"
fi
}
function download-kube-env {
# Fetch kube-env from GCE metadata server.
(
umask 077
local -r tmp_kube_env="/tmp/kube-env.yaml"
# shellcheck disable=SC2086
retry-forever 10 curl ${CURL_FLAGS} \
-H "X-Google-Metadata-Request: True" \
-o "${tmp_kube_env}" \
http://metadata.google.internal/computeMetadata/v1/instance/attributes/kube-env
# Convert the yaml format file into a shell-style file.
eval "$(python3 -c '''
import pipes,sys,yaml
items = yaml.load(sys.stdin, Loader=yaml.BaseLoader).items()
for k, v in items:
print("readonly {var}={value}".format(var=k, value=pipes.quote(str(v))))
''' < "${tmp_kube_env}" > "${KUBE_HOME}/kube-env")"
rm -f "${tmp_kube_env}"
)
}
function download-kubelet-config {
local -r dest="$1"
echo "Downloading Kubelet config file, if it exists"
# Fetch kubelet config file from GCE metadata server.
(
umask 077
local -r tmp_kubelet_config="/tmp/kubelet-config.yaml"
# shellcheck disable=SC2086
retry-forever 10 curl ${CURL_FLAGS} \
-H "X-Google-Metadata-Request: True" \
-o "${tmp_kubelet_config}" \
http://metadata.google.internal/computeMetadata/v1/instance/attributes/kubelet-config
# only write to the final location if curl succeeds
mv "${tmp_kubelet_config}" "${dest}"
)
}
function download-kube-master-certs {
# Fetch kube-env from GCE metadata server.
(
umask 077
local -r tmp_kube_master_certs="/tmp/kube-master-certs.yaml"
# shellcheck disable=SC2086
retry-forever 10 curl ${CURL_FLAGS} \
-H "X-Google-Metadata-Request: True" \
-o "${tmp_kube_master_certs}" \
http://metadata.google.internal/computeMetadata/v1/instance/attributes/kube-master-certs
# Convert the yaml format file into a shell-style file.
eval "$(python3 -c '''
import pipes,sys,yaml
items = yaml.load(sys.stdin, Loader=yaml.BaseLoader).items()
for k, v in items:
print("readonly {var}={value}".format(var=k, value=pipes.quote(str(v))))
''' < "${tmp_kube_master_certs}" > "${KUBE_HOME}/kube-master-certs")"
rm -f "${tmp_kube_master_certs}"
)
}
function validate-hash {
local -r file="$1"
local -r expected="$2"
actual_sha1=$(sha1sum "${file}" | awk '{ print $1 }') || true
actual_sha512=$(sha512sum "${file}" | awk '{ print $1 }') || true
if [[ "${actual_sha1}" != "${expected}" ]] && [[ "${actual_sha512}" != "${expected}" ]]; then
echo "== ${file} corrupted, sha1 ${actual_sha1}/sha512 ${actual_sha512} doesn't match expected ${expected} =="
return 1
fi
}
# Get default service account credentials of the VM.
GCE_METADATA_INTERNAL="http://metadata.google.internal/computeMetadata/v1/instance"
function get-credentials {
# shellcheck disable=SC2086
curl ${CURL_FLAGS} \
-H "Metadata-Flavor: Google" \
"${GCE_METADATA_INTERNAL}/service-accounts/default/token" \
| python3 -c 'import sys; import json; print(json.loads(sys.stdin.read())["access_token"])'
}
function valid-storage-scope {
# shellcheck disable=SC2086
curl ${CURL_FLAGS} \
-H "Metadata-Flavor: Google" \
"${GCE_METADATA_INTERNAL}/service-accounts/default/scopes" \
| grep -E "auth/devstorage|auth/cloud-platform"
}
# Retry a download until we get it. Takes a hash and a set of URLs.
#
# $1 is the sha512/sha1 hash of the URL. Can be "" if the sha512/sha1 hash is unknown.
# $2+ are the URLs to download.
function download-or-bust {
local -r hash="$1"
shift 1
while true; do
for url in "$@"; do
local file="${url##*/}"
rm -f "${file}"
# if the url belongs to GCS API we should use oauth2_token in the headers if the VM service account has storage scopes
local curl_headers=""
if [[ "$url" =~ ^https://storage.googleapis.com.* ]] ; then
local canUseCredentials=0
echo "Getting the scope of service account configured for VM."
if ! valid-storage-scope ; then
canUseCredentials=1
# this behavior is preserved for backward compatibility. We want to fail fast if SA is not available
# and try to download without SA if scope does not exist on SA
echo "No service account or service account without storage scope. Attempt to download without service account token."
fi
if [[ "${canUseCredentials}" == "0" ]] ; then
echo "Getting the service account access token configured for VM."
local access_token="";
if access_token=$(get-credentials); then
echo "Service account access token is received. Downloading ${url} using this token."
else
echo "Cannot get a service account token. Exiting."
exit 1
fi
curl_headers=${access_token:+Authorization: Bearer "${access_token}"}
fi
fi
if ! curl ${curl_headers:+-H "${curl_headers}"} -f --ipv4 -Lo "${file}" --connect-timeout 20 --max-time 300 --retry 6 --retry-delay 10 --retry-connrefused "${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} (HASH = ${hash}) =="
else
echo "== Downloaded ${url} =="
fi
return
fi
done
done
}
function is-preloaded {
local -r key=$1
local -r value=$2
grep -qs "${key},${value}" "${KUBE_HOME}/preload_info"
}
function split-commas {
echo -e "${1//,/'\n'}"
}
function remount-flexvolume-directory {
local -r flexvolume_plugin_dir=$1
mkdir -p "$flexvolume_plugin_dir"
mount --bind "$flexvolume_plugin_dir" "$flexvolume_plugin_dir"
mount -o remount,exec "$flexvolume_plugin_dir"
}
function install-gci-mounter-tools {
CONTAINERIZED_MOUNTER_HOME="${KUBE_HOME}/containerized_mounter"
local -r mounter_tar_sha="${DEFAULT_MOUNTER_TAR_SHA}"
if is-preloaded "mounter" "${mounter_tar_sha}"; then
echo "mounter is preloaded."
return
fi
echo "Downloading gci mounter tools."
mkdir -p "${CONTAINERIZED_MOUNTER_HOME}"
chmod a+x "${CONTAINERIZED_MOUNTER_HOME}"
mkdir -p "${CONTAINERIZED_MOUNTER_HOME}/rootfs"
download-or-bust "${mounter_tar_sha}" "https://storage.googleapis.com/kubernetes-release/gci-mounter/mounter.tar"
cp "${KUBE_HOME}/kubernetes/server/bin/mounter" "${CONTAINERIZED_MOUNTER_HOME}/mounter"
chmod a+x "${CONTAINERIZED_MOUNTER_HOME}/mounter"
mv "${KUBE_HOME}/mounter.tar" /tmp/mounter.tar
tar xf /tmp/mounter.tar -C "${CONTAINERIZED_MOUNTER_HOME}/rootfs"
rm /tmp/mounter.tar
mkdir -p "${CONTAINERIZED_MOUNTER_HOME}/rootfs/var/lib/kubelet"
}
# Install node problem detector binary.
function install-node-problem-detector {
if [[ -n "${NODE_PROBLEM_DETECTOR_VERSION:-}" ]]; then
local -r npd_version="${NODE_PROBLEM_DETECTOR_VERSION}"
local -r npd_hash="${NODE_PROBLEM_DETECTOR_TAR_HASH}"
else
local -r npd_version="${DEFAULT_NPD_VERSION}"
case "${HOST_PLATFORM}/${HOST_ARCH}" in
linux/amd64)
local -r npd_hash="${DEFAULT_NPD_HASH_AMD64}"
;;
linux/arm64)
local -r npd_hash="${DEFAULT_NPD_HASH_ARM64}"
;;
# no other architectures are supported currently.
# Assumption is that this script only runs on linux,
# see cluster/gce/windows/k8s-node-setup.psm1 for windows
# https://github.com/kubernetes/node-problem-detector/releases/
*)
echo "Unrecognized version and platform/arch combination:"
echo "$DEFAULT_NPD_VERSION $HOST_PLATFORM/$HOST_ARCH"
echo "Set NODE_PROBLEM_DETECTOR_VERSION and NODE_PROBLEM_DETECTOR_TAR_HASH to overwrite"
exit 1
;;
esac
fi
local -r npd_tar="node-problem-detector-${npd_version}-${HOST_PLATFORM}_${HOST_ARCH}.tar.gz"
if is-preloaded "${npd_tar}" "${npd_hash}"; then
echo "${npd_tar} is preloaded."
return
fi
if [[ -n "${NODE_PROBLEM_DETECTOR_RELEASE_PATH:-}" ]]; then
echo "Downloading ${npd_tar} from ${NODE_PROBLEM_DETECTOR_RELEASE_PATH}."
local -r download_path="${NODE_PROBLEM_DETECTOR_RELEASE_PATH}/node-problem-detector/${npd_tar}"
else
echo "Downloading ${npd_tar} from github."
local -r download_path="https://github.com/kubernetes/node-problem-detector/releases/download/${npd_version}/${npd_tar}"
fi
download-or-bust "${npd_hash}" "${download_path}"
local -r npd_dir="${KUBE_HOME}/node-problem-detector"
mkdir -p "${npd_dir}"
tar xzf "${KUBE_HOME}/${npd_tar}" -C "${npd_dir}" --overwrite
mv "${npd_dir}/bin"/* "${KUBE_BIN}"
chmod a+x "${KUBE_BIN}/node-problem-detector"
rmdir "${npd_dir}/bin"
rm -f "${KUBE_HOME}/${npd_tar}"
}
function install-cni-binaries {
local -r cni_version=${CNI_VERSION:-$DEFAULT_CNI_VERSION}
if [[ -n "${CNI_VERSION:-}" ]]; then
local -r cni_hash="${CNI_HASH:-}"
else
local -r cni_hash="${DEFAULT_CNI_HASH}"
fi
local -r cni_tar="${CNI_TAR_PREFIX}${cni_version}.tgz"
local -r cni_url="${CNI_STORAGE_URL_BASE}/${cni_version}/${cni_tar}"
if is-preloaded "${cni_tar}" "${cni_hash}"; then
echo "${cni_tar} is preloaded."
return
fi
echo "Downloading cni binaries"
download-or-bust "${cni_hash}" "${cni_url}"
local -r cni_dir="${KUBE_HOME}/cni"
mkdir -p "${cni_dir}/bin"
tar xzf "${KUBE_HOME}/${cni_tar}" -C "${cni_dir}/bin" --overwrite
mv "${cni_dir}/bin"/* "${KUBE_BIN}"
rmdir "${cni_dir}/bin"
rm -f "${KUBE_HOME}/${cni_tar}"
}
# Install crictl binary.
# Assumptions: HOST_PLATFORM and HOST_ARCH are specified by calling detect_host_info.
function install-crictl {
if [[ -n "${CRICTL_VERSION:-}" ]]; then
local -r crictl_version="${CRICTL_VERSION}"
local -r crictl_hash="${CRICTL_TAR_HASH}"
else
local -r crictl_version="${DEFAULT_CRICTL_VERSION}"
case "${HOST_PLATFORM}/${HOST_ARCH}" in
linux/amd64)
local -r crictl_hash="${DEFAULT_CRICTL_AMD64_SHA512}"
;;
linux/arm64)
local -r crictl_hash="${DEFAULT_CRICTL_ARM64_SHA512}"
;;
*)
echo "Unrecognized version and platform/arch combination:"
echo "$DEFAULT_CRICTL_VERSION $HOST_PLATFORM/$HOST_ARCH"
echo "Set CRICTL_VERSION and CRICTL_TAR_HASH to overwrite"
exit 1
esac
fi
local -r crictl="crictl-${crictl_version}-${HOST_PLATFORM}-${HOST_ARCH}.tar.gz"
# Create crictl config file.
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: ${CONTAINER_RUNTIME_ENDPOINT:-unix:///run/containerd/containerd.sock}
EOF
if is-preloaded "${crictl}" "${crictl_hash}"; then
echo "crictl is preloaded"
return
fi
echo "Downloading crictl"
local -r crictl_path="https://storage.googleapis.com/k8s-artifacts-cri-tools/release/${crictl_version}"
download-or-bust "${crictl_hash}" "${crictl_path}/${crictl}"
tar xf "${crictl}"
mv crictl "${KUBE_BIN}/crictl"
rm -f "${crictl}"
}
function install-kube-manifests {
# Put kube-system pods manifests in ${KUBE_HOME}/kube-manifests/.
local dst_dir="${KUBE_HOME}/kube-manifests"
mkdir -p "${dst_dir}"
local manifests_tar_urls
while IFS= read -r url; do
manifests_tar_urls+=("$url")
done < <(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 hash (not found in env)"
download-or-bust "" "${manifests_tar_urls[@]/.tar.gz/.tar.gz.sha512}"
local -r manifests_tar_hash=$(cat "${manifests_tar}.sha512")
fi
if is-preloaded "${manifests_tar}" "${manifests_tar_hash}"; then
echo "${manifests_tar} is preloaded."
return
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:-registry.k8s.io}"
if [[ "${kube_addon_registry}" != "registry.k8s.io" ]]; then
find "${dst_dir}" \( -name '*.yaml' -or -name '*.yaml.in' \) -print0 | \
xargs -0 sed -ri "s@(image:\s.*)registry.k8s.io@\1${kube_addon_registry}@"
find "${dst_dir}" \( -name '*.manifest' -or -name '*.json' \) -print0 | \
xargs -0 sed -ri "s@(image\":\s+\")registry.k8s.io@\1${kube_addon_registry}@"
fi
cp "${dst_dir}/kubernetes/gci-trusty/gci-configure-helper.sh" "${KUBE_BIN}/configure-helper.sh"
cp "${dst_dir}/kubernetes/gci-trusty/configure-kubeapiserver.sh" "${KUBE_BIN}/configure-kubeapiserver.sh"
if [[ -e "${dst_dir}/kubernetes/gci-trusty/gke-internal-configure-helper.sh" ]]; then
cp "${dst_dir}/kubernetes/gci-trusty/gke-internal-configure-helper.sh" "${KUBE_BIN}/"
fi
rm -f "${KUBE_HOME}/${manifests_tar}"
rm -f "${KUBE_HOME}/${manifests_tar}.sha512"
}
# A helper function for loading a docker image. It keeps trying up to 5 times.
#
# $1: Full path of the docker image
function try-load-docker-image {
local -r img=$1
echo "Try to load docker image file ${img}"
# Temporarily turn off errexit, because we don't want to exit on first failure.
set +e
local -r max_attempts=5
local -i attempt_num=1
if [[ "${CONTAINER_RUNTIME_NAME:-}" == "containerd" || "${CONTAINERD_TEST:-}" == "containerd" ]]; then
load_image_command=${LOAD_IMAGE_COMMAND:-ctr -n=k8s.io images import}
tag_image_command=${TAG_IMAGE_COMMAND:-ctr -n=k8s.io images tag}
else
load_image_command="${LOAD_IMAGE_COMMAND:-}"
tag_image_command="${TAG_IMAGE_COMMAND:-}"
fi
# Deliberately word split load_image_command
# shellcheck disable=SC2086
until timeout 30 ${load_image_command} "${img}"; do
if [[ "${attempt_num}" == "${max_attempts}" ]]; then
echo "Fail to load docker image file ${img} using ${load_image_command} after ${max_attempts} retries. Exit!!"
exit 1
else
attempt_num=$((attempt_num+1))
sleep 5
fi
done
if [[ -n "${KUBE_ADDON_REGISTRY:-}" ]]; then
# remove the prefix and suffix from the path to get the container name
container=${img##*/}
container=${container%.tar}
# find the right one for which we will need an additional tag
container=$(ctr -n k8s.io images ls | grep "registry.k8s.io/${container}" | awk '{print $1}' | cut -f 2 -d '/')
${tag_image_command} "registry.k8s.io/${container}" "${KUBE_ADDON_REGISTRY}/${container}"
fi
# Re-enable errexit.
set -e
}
# Loads kube-system docker images. It is better to do it before starting kubelet,
# as kubelet will restart docker daemon, which may interfere with loading images.
function load-docker-images {
echo "Start loading kube-system docker images"
local -r img_dir="${KUBE_HOME}/kube-docker-files"
if [[ "${KUBERNETES_MASTER:-}" == "true" ]]; then
try-load-docker-image "${img_dir}/kube-apiserver.tar"
try-load-docker-image "${img_dir}/kube-controller-manager.tar"
try-load-docker-image "${img_dir}/kube-scheduler.tar"
else
try-load-docker-image "${img_dir}/kube-proxy.tar"
fi
}
# If we are on ubuntu we can try to install containerd
function install-containerd-ubuntu {
# bailout if we are not on ubuntu
if [[ -z "$(command -v lsb_release)" || $(lsb_release -si) != "Ubuntu" ]]; then
echo "Unable to automatically install containerd in non-ubuntu image. Bailing out..."
exit 2
fi
# Install dependencies, some of these are already installed in the image but
# that's fine since they won't re-install and we can reuse the code below
# for another image someday.
apt-get update
apt-get install -y --no-install-recommends \
apt-transport-https \
ca-certificates \
socat \
curl \
gnupg2 \
software-properties-common \
lsb-release
release=$(lsb_release -cs)
# Add the Docker apt-repository (as we install containerd from there)
# shellcheck disable=SC2086
curl ${CURL_FLAGS} \
--location \
"https://download.docker.com/${HOST_PLATFORM}/$(. /etc/os-release; echo "$ID")/gpg" \
| apt-key add -
add-apt-repository \
"deb [arch=${HOST_ARCH}] https://download.docker.com/${HOST_PLATFORM}/$(. /etc/os-release; echo "$ID") \
$release stable"
# Install containerd from Docker repo
apt-get update && \
apt-get install -y --no-install-recommends containerd
rm -rf /var/lib/apt/lists/*
# Override to latest versions of containerd and runc
systemctl stop containerd
if [[ -n "${UBUNTU_INSTALL_CONTAINERD_VERSION:-}" ]]; then
# containerd versions have slightly different url(s), so try both
# shellcheck disable=SC2086
( curl ${CURL_FLAGS} \
--location \
"https://github.com/containerd/containerd/releases/download/${UBUNTU_INSTALL_CONTAINERD_VERSION}/containerd-${UBUNTU_INSTALL_CONTAINERD_VERSION:1}-${HOST_PLATFORM}-${HOST_ARCH}.tar.gz" \
|| curl ${CURL_FLAGS} \
--location \
"https://github.com/containerd/containerd/releases/download/${UBUNTU_INSTALL_CONTAINERD_VERSION}/containerd-${UBUNTU_INSTALL_CONTAINERD_VERSION:1}.${HOST_PLATFORM}-${HOST_ARCH}.tar.gz" ) \
| tar --overwrite -xzv -C /usr/
fi
if [[ -n "${UBUNTU_INSTALL_RUNC_VERSION:-}" ]]; then
# shellcheck disable=SC2086
curl ${CURL_FLAGS} \
--location \
"https://github.com/opencontainers/runc/releases/download/${UBUNTU_INSTALL_RUNC_VERSION}/runc.${HOST_ARCH}" --output /usr/sbin/runc \
&& chmod 755 /usr/sbin/runc
fi
sudo systemctl start containerd
}
# If we are on cos we can try to install containerd
function install-containerd-cos {
# bailout if we are not on COS
if [ -e /etc/os-release ] && ! grep -q "ID=cos" /etc/os-release; then
echo "Unable to automatically install containerd in non-cos image. Bailing out..."
exit 2
fi
# Override to latest versions of containerd and runc
systemctl stop containerd
mkdir -p /home/containerd/
mount --bind /home/containerd /home/containerd
mount -o remount,exec /home/containerd
if [[ -n "${COS_INSTALL_CONTAINERD_VERSION:-}" ]]; then
# containerd versions have slightly different url(s), so try both
# shellcheck disable=SC2086
( curl ${CURL_FLAGS} \
--location \
"https://github.com/containerd/containerd/releases/download/${COS_INSTALL_CONTAINERD_VERSION}/containerd-${COS_INSTALL_CONTAINERD_VERSION:1}-${HOST_PLATFORM}-${HOST_ARCH}.tar.gz" \
|| curl ${CURL_FLAGS} \
--location \
"https://github.com/containerd/containerd/releases/download/${COS_INSTALL_CONTAINERD_VERSION}/containerd-${COS_INSTALL_CONTAINERD_VERSION:1}.${HOST_PLATFORM}-${HOST_ARCH}.tar.gz" ) \
| tar --overwrite -xzv -C /home/containerd/
cp /usr/lib/systemd/system/containerd.service /etc/systemd/system/containerd.service
# fix the path of the new containerd binary
sed -i 's|ExecStart=.*|ExecStart=/home/containerd/bin/containerd|' /etc/systemd/system/containerd.service
fi
if [[ -n "${COS_INSTALL_RUNC_VERSION:-}" ]]; then
# shellcheck disable=SC2086
curl ${CURL_FLAGS} \
--location \
"https://github.com/opencontainers/runc/releases/download/${COS_INSTALL_RUNC_VERSION}/runc.${HOST_ARCH}" --output /home/containerd/bin/runc \
&& chmod 755 /home/containerd/bin/runc
# ensure runc gets picked up from the correct location
sed -i "/\[Service\]/a Environment=PATH=/home/containerd/bin:$PATH" /etc/systemd/system/containerd.service
fi
systemctl daemon-reload
sudo systemctl start containerd
}
function install-auth-provider-gcp {
local -r filename="auth-provider-gcp"
local -r auth_provider_storage_full_path="${AUTH_PROVIDER_GCP_STORAGE_PATH}/${AUTH_PROVIDER_GCP_VERSION}/${HOST_PLATFORM}_${HOST_ARCH}/${filename}"
echo "Downloading auth-provider-gcp ${auth_provider_storage_full_path}" .
case "${HOST_ARCH}" in
amd64)
local -r auth_provider_gcp_hash="${AUTH_PROVIDER_GCP_HASH_LINUX_AMD64}"
;;
arm64)
local -r auth_provider_gcp_hash="${AUTH_PROVIDER_GCP_HASH_LINUX_ARM64}"
;;
*)
echo "Unrecognized version and platform/arch combination: ${HOST_PLATFORM}/${HOST_ARCH}"
exit 1
esac
download-or-bust "${auth_provider_gcp_hash}" "${auth_provider_storage_full_path}"
mv "${KUBE_HOME}/${filename}" "${AUTH_PROVIDER_GCP_LINUX_BIN_DIR}"
chmod a+x "${AUTH_PROVIDER_GCP_LINUX_BIN_DIR}/${filename}"
cat > "${AUTH_PROVIDER_GCP_LINUX_CONF_FILE}" << EOF
kind: CredentialProviderConfig
apiVersion: kubelet.config.k8s.io/v1
providers:
- name: auth-provider-gcp
apiVersion: credentialprovider.kubelet.k8s.io/v1
matchImages:
- "container.cloud.google.com"
- "gcr.io"
- "*.gcr.io"
- "*.pkg.dev"
args:
- get-credentials
- --v=3
defaultCacheDuration: 1m
EOF
}
function ensure-containerd-runtime {
# Install containerd/runc if requested
if [[ -n "${UBUNTU_INSTALL_CONTAINERD_VERSION:-}" || -n "${UBUNTU_INSTALL_RUNC_VERSION:-}" ]]; then
log-wrap "InstallContainerdUbuntu" install-containerd-ubuntu
fi
if [[ -n "${COS_INSTALL_CONTAINERD_VERSION:-}" || -n "${COS_INSTALL_RUNC_VERSION:-}" ]]; then
log-wrap "InstallContainerdCOS" install-containerd-cos
fi
# Fall back to installing distro specific containerd, if not found
if ! command -v containerd >/dev/null 2>&1; then
local linuxrelease="cos"
if [[ -n "$(command -v lsb_release)" ]]; then
linuxrelease=$(lsb_release -si)
fi
case "${linuxrelease}" in
Ubuntu)
log-wrap "InstallContainerdUbuntu" install-containerd-ubuntu
;;
cos)
log-wrap "InstallContainerdCOS" install-containerd-cos
;;
*)
echo "Installing containerd for linux release ${linuxrelease} not supported" >&2
exit 2
;;
esac
fi
# when custom containerd version is installed sourcing containerd_env.sh will add all tools like ctr to the PATH
if [[ -e "/etc/profile.d/containerd_env.sh" ]]; then
log-wrap 'SourceContainerdEnv' source "/etc/profile.d/containerd_env.sh"
fi
# Verify presence and print versions of ctr, containerd, runc
if ! command -v ctr >/dev/null 2>&1; then
echo "ERROR ctr not found. Aborting."
exit 2
fi
ctr --version
if ! command -v containerd >/dev/null 2>&1; then
echo "ERROR containerd not found. Aborting."
exit 2
fi
containerd --version
if ! command -v runc >/dev/null 2>&1; then
echo "ERROR runc not found. Aborting."
exit 2
fi
runc --version
}
function ensure-container-runtime {
case "${CONTAINER_RUNTIME_NAME:-containerd}" in
containerd)
ensure-containerd-runtime
;;
#TODO: Add crio support
*)
echo "Unsupported container runtime (${CONTAINER_RUNTIME_NAME})." >&2
exit 2
;;
esac
}
# Downloads kubernetes binaries and kube-system manifest tarball, unpacks them,
# and places them into suitable directories. Files are placed in /home/kubernetes.
function install-kube-binary-config {
cd "${KUBE_HOME}"
local server_binary_tar_urls
while IFS= read -r url; do
server_binary_tar_urls+=("$url")
done < <(split-commas "${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="${SERVER_BINARY_TAR_HASH}"
else
echo "Downloading binary release sha512 (not found in env)"
log-wrap "DownloadServerBinarySHA" download-or-bust "" "${server_binary_tar_urls[@]/.tar.gz/.tar.gz.sha512}"
local -r server_binary_tar_hash=$(cat "${server_binary_tar}.sha512")
fi
if is-preloaded "${server_binary_tar}" "${server_binary_tar_hash}"; then
echo "${server_binary_tar} is preloaded."
else
echo "Downloading binary release tar"
log-wrap "DownloadServerBinary" download-or-bust "${server_binary_tar_hash}" "${server_binary_tar_urls[@]}"
log-wrap "UntarServerBinary" tar xzf "${KUBE_HOME}/${server_binary_tar}" -C "${KUBE_HOME}" --overwrite
# Copy docker_tag and image files to ${KUBE_HOME}/kube-docker-files.
local -r src_dir="${KUBE_HOME}/kubernetes/server/bin"
local 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" "${dst_dir}"
fi
log-wrap "LoadDockerImages" load-docker-images
mv "${src_dir}/kubelet" "${KUBE_BIN}"
mv "${src_dir}/kubectl" "${KUBE_BIN}"
# Some older images have LICENSES baked-in as a file. Presumably they will
# have the directory baked-in eventually.
rm -rf "${KUBE_HOME}"/LICENSES
mv "${KUBE_HOME}/kubernetes/LICENSES" "${KUBE_HOME}"
mv "${KUBE_HOME}/kubernetes/kubernetes-src.tar.gz" "${KUBE_HOME}"
fi
if [[ "${KUBERNETES_MASTER:-}" == "false" ]] && \
[[ "${ENABLE_NODE_PROBLEM_DETECTOR:-}" == "standalone" ]]; then
log-wrap "InstallNodeProblemDetector" install-node-problem-detector
fi
if [[ "${NETWORK_PROVIDER:-}" == "kubenet" ]] || \
[[ "${NETWORK_PROVIDER:-}" == "cni" ]]; then
log-wrap "InstallCNIBinaries" install-cni-binaries
fi
# Put kube-system pods manifests in ${KUBE_HOME}/kube-manifests/.
log-wrap "InstallKubeManifests" install-kube-manifests
chmod -R 755 "${KUBE_BIN}"
# Install gci mounter related artifacts to allow mounting storage volumes in GCI
log-wrap "InstallGCIMounterTools" install-gci-mounter-tools
# Remount the Flexvolume directory with the "exec" option, if needed.
if [[ "${REMOUNT_VOLUME_PLUGIN_DIR:-}" == "true" && -n "${VOLUME_PLUGIN_DIR:-}" ]]; then
log-wrap "RemountFlexVolume" remount-flexvolume-directory "${VOLUME_PLUGIN_DIR}"
fi
# When ENABLE_AUTH_PROVIDER_GCP is set, following flags for out-of-tree credential provider for GCP
# are presented to kubelet:
# --image-credential-provider-config=${path-to-config}
# --image-credential-provider-bin-dir=${path-to-auth-provider-binary}
# Also, it is required that DisableKubeletCloudCredentialProviders
# feature gate is set to true for kubelet to use external credential provider.
if [[ "${ENABLE_AUTH_PROVIDER_GCP:-}" == "true" ]]; then
# Install out-of-tree auth-provider-gcp binary to enable kubelet to dynamically
# retrieve credentials for a container image registry.
log-wrap "InstallCredentialProvider" install-auth-provider-gcp
fi
# Install crictl on each node.
log-wrap "InstallCrictl" install-crictl
# Clean up.
rm -rf "${KUBE_HOME}/kubernetes"
rm -f "${KUBE_HOME}/${server_binary_tar}"
rm -f "${KUBE_HOME}/${server_binary_tar}.sha512"
}
# This function detects the platform/arch of the machine where the script runs,
# and sets the HOST_PLATFORM and HOST_ARCH environment variables accordingly.
# Callers can specify HOST_PLATFORM_OVERRIDE and HOST_ARCH_OVERRIDE to skip the detection.
# This function is adapted from the detect_client_info function in cluster/get-kube-binaries.sh
# and kube::util::host_os, kube::util::host_arch functions in hack/lib/util.sh
# This function should be synced with detect_host_info in ./configure-helper.sh
function detect_host_info() {
HOST_PLATFORM=${HOST_PLATFORM_OVERRIDE:-"$(uname -s)"}
case "${HOST_PLATFORM}" in
Linux|linux)
HOST_PLATFORM="linux"
;;
*)
echo "Unknown, unsupported platform: ${HOST_PLATFORM}." >&2
echo "Supported platform(s): linux." >&2
echo "Bailing out." >&2
exit 2
esac
HOST_ARCH=${HOST_ARCH_OVERRIDE:-"$(uname -m)"}
case "${HOST_ARCH}" in
x86_64*|i?86_64*|amd64*)
HOST_ARCH="amd64"
;;
aHOST_arch64*|aarch64*|arm64*)
HOST_ARCH="arm64"
;;
*)
echo "Unknown, unsupported architecture (${HOST_ARCH})." >&2
echo "Supported architecture(s): amd64 and arm64." >&2
echo "Bailing out." >&2
exit 2
;;
esac
}
# Retries a command forever with a delay between retries.
# Args:
# $1 : delay between retries, in seconds.
# $2... : the command to run.
function retry-forever {
local -r delay="$1"
shift 1
until "$@"; do
echo "== $* failed, retrying after ${delay}s"
sleep "${delay}"
done
}
# Initializes variables used by the log-* functions.
#
# get-metadata-value must be defined before calling this function.
#
# NOTE: this function is duplicated in configure-helper.sh, any changes here
# should be duplicated there as well.
function log-init {
# Used by log-* functions.
LOG_CLUSTER_ID=$(get-metadata-value 'instance/attributes/cluster-uid' 'get-metadata-value-error')
LOG_INSTANCE_NAME=$(hostname)
LOG_BOOT_ID=$(journalctl --list-boots | grep -E '^ *0' | awk '{print $2}')
declare -Ag LOG_START_TIMES
declare -ag LOG_TRAP_STACK
LOG_STATUS_STARTED='STARTED'
LOG_STATUS_COMPLETED='COMPLETED'
LOG_STATUS_ERROR='ERROR'
}
# Sets an EXIT trap.
# Args:
# $1:... : the trap command.
#
# NOTE: this function is duplicated in configure-helper.sh, any changes here
# should be duplicated there as well.
function log-trap-push {
local t="${*:1}"
LOG_TRAP_STACK+=("${t}")
# shellcheck disable=2064
trap "${t}" EXIT
}
# Removes and restores an EXIT trap.
#
# NOTE: this function is duplicated in configure-helper.sh, any changes here
# should be duplicated there as well.
function log-trap-pop {
# Remove current trap.
unset 'LOG_TRAP_STACK[-1]'
# Restore previous trap.
if [ ${#LOG_TRAP_STACK[@]} -ne 0 ]; then
local t="${LOG_TRAP_STACK[-1]}"
# shellcheck disable=2064
trap "${t}" EXIT
else
# If no traps in stack, clear.
trap EXIT
fi
}
# Logs the end of a bootstrap step that errored.
# Args:
# $1 : bootstrap step name.
#
# NOTE: this function is duplicated in configure-helper.sh, any changes here
# should be duplicated there as well.
function log-error {
local bootstep="$1"
log-proto "${bootstep}" "${LOG_STATUS_ERROR}" "encountered non-zero exit code"
}
# Wraps a command with bootstrap logging.
# Args:
# $1 : bootstrap step name.
# $2... : the command to run.
#
# NOTE: this function is duplicated in configure-helper.sh, any changes here
# should be duplicated there as well.
function log-wrap {
local bootstep="$1"
local command="${*:2}"
log-trap-push "log-error ${bootstep}"
log-proto "${bootstep}" "${LOG_STATUS_STARTED}"
$command
log-proto "${bootstep}" "${LOG_STATUS_COMPLETED}"
log-trap-pop
}
# Logs a bootstrap step start. Prefer log-wrap.
# Args:
# $1 : bootstrap step name.
#
# NOTE: this function is duplicated in configure-helper.sh, any changes here
# should be duplicated there as well.
function log-start {
local bootstep="$1"
log-trap-push "log-error ${bootstep}"
log-proto "${bootstep}" "${LOG_STATUS_STARTED}"
}
# Logs a bootstrap step end. Prefer log-wrap.
# Args:
# $1 : bootstrap step name.
#
# NOTE: this function is duplicated in configure-helper.sh, any changes here
# should be duplicated there as well.
function log-end {
local bootstep="$1"
log-proto "${bootstep}" "${LOG_STATUS_COMPLETED}"
log-trap-pop
}
# Writes a log proto to stdout.
# Args:
# $1: bootstrap step name.
# $2: status. Either 'STARTED', 'COMPLETED', or 'ERROR'.
# $3: optional status reason.
#
# NOTE: this function is duplicated in configure-helper.sh, any changes here
# should be duplicated there as well.
function log-proto {
local bootstep="$1"
local status="$2"
local status_reason="${3:-}"
# Get current time.
local current_time
current_time="$(date --utc '+%s.%N')"
# ...formatted as UTC RFC 3339.
local timestamp
timestamp="$(date --utc --date="@${current_time}" '+%FT%T.%NZ')"
# Calculate latency.
local latency='null'
if [ "${status}" == "${LOG_STATUS_STARTED}" ]; then
LOG_START_TIMES["${bootstep}"]="${current_time}"
else
local start_time="${LOG_START_TIMES["${bootstep}"]}"
unset 'LOG_START_TIMES['"${bootstep}"']'
# Bash cannot do non-integer math, shell out to awk.
latency="$(echo "${current_time} ${start_time}" | awk '{print $1 - $2}')s"
# The default latency is null which cannot be wrapped as a string so we must
# do it here instead of the printf.
latency="\"${latency}\""
fi
printf '[cloud.kubernetes.monitoring.proto.SerialportLog] {"cluster_hash":"%s","vm_instance_name":"%s","boot_id":"%s","timestamp":"%s","bootstrap_status":{"step_name":"%s","status":"%s","status_reason":"%s","latency":%s}}\n' \
"${LOG_CLUSTER_ID}" "${LOG_INSTANCE_NAME}" "${LOG_BOOT_ID}" "${timestamp}" "${bootstep}" "${status}" "${status_reason}" "${latency}"
}
######### Main Function ##########
log-init
log-start 'ConfigureMain'
echo "Start to install kubernetes files"
log-wrap 'DetectHostInfo' detect_host_info
# if install fails, message-of-the-day (motd) will warn at login shell
log-wrap 'SetBrokenMotd' set-broken-motd
KUBE_HOME="/home/kubernetes"
KUBE_BIN="${KUBE_HOME}/bin"
# download and source kube-env
log-wrap 'DownloadKubeEnv' download-kube-env
log-wrap 'SourceKubeEnv' source "${KUBE_HOME}/kube-env"
log-wrap 'DownloadKubeletConfig' download-kubelet-config "${KUBE_HOME}/kubelet-config.yaml"
# master certs
if [[ "${KUBERNETES_MASTER:-}" == "true" ]]; then
log-wrap 'DownloadKubeMasterCerts' download-kube-master-certs
fi
# ensure chosen container runtime is present
log-wrap 'EnsureContainerRuntime' ensure-container-runtime
# binaries and kube-system manifests
log-wrap 'InstallKubeBinaryConfig' install-kube-binary-config
echo "Done for installing kubernetes files"
log-end 'ConfigureMain'
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