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util.sh
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util.sh
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#!/bin/bash
# Copyright 2014 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.
# A library of helper functions and constant for the local config.
# Use the config file specified in $KUBE_CONFIG_FILE, or default to
# config-default.sh.
KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
source "${KUBE_ROOT}/cluster/gce/${KUBE_CONFIG_FILE-"config-default.sh"}"
source "${KUBE_ROOT}/cluster/common.sh"
if [[ "${OS_DISTRIBUTION}" == "debian" || "${OS_DISTRIBUTION}" == "coreos" || "${OS_DISTRIBUTION}" == "trusty" ]]; then
source "${KUBE_ROOT}/cluster/gce/${OS_DISTRIBUTION}/helper.sh"
else
echo "Cannot operate on cluster using os distro: ${OS_DISTRIBUTION}" >&2
exit 1
fi
NODE_INSTANCE_PREFIX="${INSTANCE_PREFIX}-minion"
ALLOCATE_NODE_CIDRS=true
KUBE_PROMPT_FOR_UPDATE=y
KUBE_SKIP_UPDATE=${KUBE_SKIP_UPDATE-"n"}
# Suffix to append to the staging path used for the server tars. Useful if
# multiple versions of the server are being used in the same project
# simultaneously (e.g. on Jenkins).
KUBE_GCS_STAGING_PATH_SUFFIX=${KUBE_GCS_STAGING_PATH_SUFFIX-""}
# How long (in seconds) to wait for cluster initialization.
KUBE_CLUSTER_INITIALIZATION_TIMEOUT=${KUBE_CLUSTER_INITIALIZATION_TIMEOUT:-300}
function join_csv {
local IFS=','; echo "$*";
}
# Verify prereqs
function verify-prereqs {
if [[ "${ENABLE_EXPERIMENTAL_API}" == "true" ]]; then
if [[ -z "${RUNTIME_CONFIG}" ]]; then
RUNTIME_CONFIG="extensions/v1beta1=true"
else
# TODO: add checking if RUNTIME_CONFIG contains "extensions/v1beta1=false" and appending "extensions/v1beta1=true" if not.
if echo "${RUNTIME_CONFIG}" | grep -q -v "extensions/v1beta1=true"; then
echo "Experimental API should be turned on, but is not turned on in RUNTIME_CONFIG!" >&2
exit 1
fi
fi
fi
if [[ "${ENABLE_DEPLOYMENTS}" == "true" ]]; then
if [[ -z "${RUNTIME_CONFIG}" ]]; then
RUNTIME_CONFIG="extensions/v1beta1/deployments=true"
else
RUNTIME_CONFIG="${RUNTIME_CONFIG},extensions/v1beta1/deployments=true"
fi
fi
local cmd
for cmd in gcloud gsutil; do
if ! which "${cmd}" >/dev/null; then
local resp
if [[ "${KUBE_PROMPT_FOR_UPDATE}" == "y" ]]; then
echo "Can't find ${cmd} in PATH. Do you wish to install the Google Cloud SDK? [Y/n]"
read resp
else
resp="y"
fi
if [[ "${resp}" != "n" && "${resp}" != "N" ]]; then
curl https://sdk.cloud.google.com | bash
fi
if ! which "${cmd}" >/dev/null; then
echo "Can't find ${cmd} in PATH, please fix and retry. The Google Cloud " >&2
echo "SDK can be downloaded from https://cloud.google.com/sdk/." >&2
exit 1
fi
fi
done
if [[ "${KUBE_SKIP_UPDATE}" == "y" ]]; then
return
fi
# update and install components as needed
if [[ "${KUBE_PROMPT_FOR_UPDATE}" != "y" ]]; then
gcloud_prompt="-q"
fi
local sudo_prefix=""
if [ ! -w $(dirname `which gcloud`) ]; then
sudo_prefix="sudo"
fi
${sudo_prefix} gcloud ${gcloud_prompt:-} components update preview || true
${sudo_prefix} gcloud ${gcloud_prompt:-} components update alpha || true
${sudo_prefix} gcloud ${gcloud_prompt:-} components update || true
}
# Create a temp dir that'll be deleted at the end of this bash session.
#
# Vars set:
# KUBE_TEMP
function ensure-temp-dir {
if [[ -z ${KUBE_TEMP-} ]]; then
KUBE_TEMP=$(mktemp -d -t kubernetes.XXXXXX)
trap 'rm -rf "${KUBE_TEMP}"' EXIT
fi
}
# Use the gcloud defaults to find the project. If it is already set in the
# environment then go with that.
#
# Vars set:
# PROJECT
# PROJECT_REPORTED
function detect-project () {
if [[ -z "${PROJECT-}" ]]; then
PROJECT=$(gcloud config list project | tail -n 1 | cut -f 3 -d ' ')
fi
if [[ -z "${PROJECT-}" ]]; then
echo "Could not detect Google Cloud Platform project. Set the default project using " >&2
echo "'gcloud config set project <PROJECT>'" >&2
exit 1
fi
if [[ -z "${PROJECT_REPORTED-}" ]]; then
echo "Project: ${PROJECT}" >&2
echo "Zone: ${ZONE}" >&2
PROJECT_REPORTED=true
fi
}
function sha1sum-file() {
if which shasum >/dev/null 2>&1; then
shasum -a1 "$1" | awk '{ print $1 }'
else
sha1sum "$1" | awk '{ print $1 }'
fi
}
function already-staged() {
local -r file=$1
local -r newsum=$2
[[ -e "${file}.uploaded.sha1" ]] || return 1
local oldsum
oldsum=$(cat "${file}.uploaded.sha1")
[[ "${oldsum}" == "${newsum}" ]]
}
# Copy a release tar, if we don't already think it's staged in GCS
function copy-if-not-staged() {
local -r staging_path=$1
local -r gs_url=$2
local -r tar=$3
local -r hash=$4
if already-staged "${tar}" "${hash}"; then
echo "+++ $(basename ${tar}) already staged ('rm ${tar}.uploaded.sha1' to force)"
else
echo "${hash}" > "${tar}.sha1"
gsutil -m -q -h "Cache-Control:private, max-age=0" cp "${tar}" "${tar}.sha1" "${staging_path}"
gsutil -m acl ch -g all:R "${gs_url}" "${gs_url}.sha1" >/dev/null 2>&1
echo "${hash}" > "${tar}.uploaded.sha1"
echo "+++ $(basename ${tar}) uploaded (sha1 = ${hash})"
fi
}
# Take the local tar files and upload them to Google Storage. They will then be
# downloaded by the master as part of the start up script for the master.
#
# Assumed vars:
# PROJECT
# SERVER_BINARY_TAR
# SALT_TAR
# Vars set:
# SERVER_BINARY_TAR_URL
# SERVER_BINARY_TAR_HASH
# SALT_TAR_URL
# SALT_TAR_HASH
function upload-server-tars() {
SERVER_BINARY_TAR_URL=
SERVER_BINARY_TAR_HASH=
SALT_TAR_URL=
SALT_TAR_HASH=
local project_hash
if which md5 > /dev/null 2>&1; then
project_hash=$(md5 -q -s "$PROJECT")
else
project_hash=$(echo -n "$PROJECT" | md5sum | awk '{ print $1 }')
fi
# This requires 1 million projects before the probability of collision is 50%
# that's probably good enough for now :P
project_hash=${project_hash:0:10}
local -r staging_bucket="gs://kubernetes-staging-${project_hash}"
# Ensure the bucket is created
if ! gsutil ls "$staging_bucket" > /dev/null 2>&1 ; then
echo "Creating $staging_bucket"
gsutil mb "${staging_bucket}"
fi
local -r staging_path="${staging_bucket}/devel${KUBE_GCS_STAGING_PATH_SUFFIX}"
SERVER_BINARY_TAR_HASH=$(sha1sum-file "${SERVER_BINARY_TAR}")
SALT_TAR_HASH=$(sha1sum-file "${SALT_TAR}")
echo "+++ Staging server tars to Google Storage: ${staging_path}"
local server_binary_gs_url="${staging_path}/${SERVER_BINARY_TAR##*/}"
local salt_gs_url="${staging_path}/${SALT_TAR##*/}"
copy-if-not-staged "${staging_path}" "${server_binary_gs_url}" "${SERVER_BINARY_TAR}" "${SERVER_BINARY_TAR_HASH}"
copy-if-not-staged "${staging_path}" "${salt_gs_url}" "${SALT_TAR}" "${SALT_TAR_HASH}"
# Convert from gs:// URL to an https:// URL
SERVER_BINARY_TAR_URL="${server_binary_gs_url/gs:\/\//https://storage.googleapis.com/}"
SALT_TAR_URL="${salt_gs_url/gs:\/\//https://storage.googleapis.com/}"
}
# Detect minions created in the minion group
#
# Assumed vars:
# NODE_INSTANCE_PREFIX
# Vars set:
# MINION_NAMES
function detect-minion-names {
detect-project
MINION_NAMES=($(gcloud compute instance-groups managed list-instances \
"${NODE_INSTANCE_PREFIX}-group" --zone "${ZONE}" --project "${PROJECT}" \
--format=yaml | grep instance: | cut -d ' ' -f 2))
echo "MINION_NAMES=${MINION_NAMES[*]}" >&2
}
# Detect the information about the minions
#
# Assumed vars:
# ZONE
# Vars set:
# MINION_NAMES
# KUBE_MINION_IP_ADDRESSES (array)
function detect-minions () {
detect-project
detect-minion-names
KUBE_MINION_IP_ADDRESSES=()
for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
local minion_ip=$(gcloud compute instances describe --project "${PROJECT}" --zone "${ZONE}" \
"${MINION_NAMES[$i]}" --fields networkInterfaces[0].accessConfigs[0].natIP \
--format=text | awk '{ print $2 }')
if [[ -z "${minion_ip-}" ]] ; then
echo "Did not find ${MINION_NAMES[$i]}" >&2
else
echo "Found ${MINION_NAMES[$i]} at ${minion_ip}"
KUBE_MINION_IP_ADDRESSES+=("${minion_ip}")
fi
done
if [[ -z "${KUBE_MINION_IP_ADDRESSES-}" ]]; then
echo "Could not detect Kubernetes minion nodes. Make sure you've launched a cluster with 'kube-up.sh'" >&2
exit 1
fi
}
# Detect the IP for the master
#
# Assumed vars:
# MASTER_NAME
# ZONE
# Vars set:
# KUBE_MASTER
# KUBE_MASTER_IP
function detect-master () {
detect-project
KUBE_MASTER=${MASTER_NAME}
if [[ -z "${KUBE_MASTER_IP-}" ]]; then
KUBE_MASTER_IP=$(gcloud compute instances describe --project "${PROJECT}" --zone "${ZONE}" \
"${MASTER_NAME}" --fields networkInterfaces[0].accessConfigs[0].natIP \
--format=text | awk '{ print $2 }')
fi
if [[ -z "${KUBE_MASTER_IP-}" ]]; then
echo "Could not detect Kubernetes master node. Make sure you've launched a cluster with 'kube-up.sh'" >&2
exit 1
fi
echo "Using master: $KUBE_MASTER (external IP: $KUBE_MASTER_IP)"
}
# Wait for background jobs to finish. Exit with
# an error status if any of the jobs failed.
function wait-for-jobs {
local fail=0
local job
for job in $(jobs -p); do
wait "${job}" || fail=$((fail + 1))
done
if (( fail != 0 )); then
echo -e "${color_red}${fail} commands failed. Exiting.${color_norm}" >&2
# Ignore failures for now.
# exit 2
fi
}
# Robustly try to create a static ip.
# $1: The name of the ip to create
# $2: The name of the region to create the ip in.
function create-static-ip {
detect-project
local attempt=0
local REGION="$2"
while true; do
if ! gcloud compute addresses create "$1" \
--project "${PROJECT}" \
--region "${REGION}" -q > /dev/null; then
if (( attempt > 4 )); then
echo -e "${color_red}Failed to create static ip $1 ${color_norm}" >&2
exit 2
fi
attempt=$(($attempt+1))
echo -e "${color_yellow}Attempt $attempt failed to create static ip $1. Retrying.${color_norm}" >&2
sleep $(($attempt * 5))
else
break
fi
done
}
# Robustly try to create a firewall rule.
# $1: The name of firewall rule.
# $2: IP ranges.
# $3: Target tags for this firewall rule.
function create-firewall-rule {
detect-project
local attempt=0
while true; do
if ! gcloud compute firewall-rules create "$1" \
--project "${PROJECT}" \
--network "${NETWORK}" \
--source-ranges "$2" \
--target-tags "$3" \
--allow tcp,udp,icmp,esp,ah,sctp; then
if (( attempt > 4 )); then
echo -e "${color_red}Failed to create firewall rule $1 ${color_norm}" >&2
exit 2
fi
echo -e "${color_yellow}Attempt $(($attempt+1)) failed to create firewall rule $1. Retrying.${color_norm}" >&2
attempt=$(($attempt+1))
sleep $(($attempt * 5))
else
break
fi
done
}
# $1: version (required)
function get-template-name-from-version {
# trim template name to pass gce name validation
echo "${NODE_INSTANCE_PREFIX}-template-${1}" | cut -c 1-63 | sed 's/[\.\+]/-/g;s/-*$//g'
}
# Robustly try to create an instance template.
# $1: The name of the instance template.
# $2: The scopes flag.
# $3: The minion start script metadata from file.
# $4: The kube-env metadata.
function create-node-template {
detect-project
local template_name="$1"
# First, ensure the template doesn't exist.
# TODO(zmerlynn): To make this really robust, we need to parse the output and
# add retries. Just relying on a non-zero exit code doesn't
# distinguish an ephemeral failed call from a "not-exists".
if gcloud compute instance-templates describe "$template_name" --project "${PROJECT}" &>/dev/null; then
echo "Instance template ${1} already exists; deleting." >&2
if ! gcloud compute instance-templates delete "$template_name" --project "${PROJECT}" &>/dev/null; then
echo -e "${color_yellow}Failed to delete existing instance template${color_norm}" >&2
exit 2
fi
fi
local attempt=1
local preemptible_minions=""
if [[ "${PREEMPTIBLE_MINION}" == "true" ]]; then
preemptible_minions="--preemptible --maintenance-policy TERMINATE"
fi
while true; do
echo "Attempt ${attempt} to create ${1}" >&2
if ! gcloud compute instance-templates create "$template_name" \
--project "${PROJECT}" \
--machine-type "${MINION_SIZE}" \
--boot-disk-type "${MINION_DISK_TYPE}" \
--boot-disk-size "${MINION_DISK_SIZE}" \
--image-project="${MINION_IMAGE_PROJECT}" \
--image "${MINION_IMAGE}" \
--tags "${MINION_TAG}" \
--network "${NETWORK}" \
${preemptible_minions} \
$2 \
--can-ip-forward \
--metadata-from-file "$3","$4" >&2; then
if (( attempt > 5 )); then
echo -e "${color_red}Failed to create instance template $template_name ${color_norm}" >&2
exit 2
fi
echo -e "${color_yellow}Attempt ${attempt} failed to create instance template $template_name. Retrying.${color_norm}" >&2
attempt=$(($attempt+1))
else
break
fi
done
}
# Robustly try to add metadata on an instance.
# $1: The name of the instance.
# $2...$n: The metadata key=value pairs to add.
function add-instance-metadata {
local -r instance=$1
shift 1
local -r kvs=( "$@" )
detect-project
local attempt=0
while true; do
if ! gcloud compute instances add-metadata "${instance}" \
--project "${PROJECT}" \
--zone "${ZONE}" \
--metadata "${kvs[@]}"; then
if (( attempt > 5 )); then
echo -e "${color_red}Failed to add instance metadata in ${instance} ${color_norm}" >&2
exit 2
fi
echo -e "${color_yellow}Attempt $(($attempt+1)) failed to add metadata in ${instance}. Retrying.${color_norm}" >&2
attempt=$(($attempt+1))
else
break
fi
done
}
# Robustly try to add metadata on an instance, from a file.
# $1: The name of the instance.
# $2...$n: The metadata key=file pairs to add.
function add-instance-metadata-from-file {
local -r instance=$1
shift 1
local -r kvs=( "$@" )
detect-project
local attempt=0
while true; do
echo "${kvs[@]}"
if ! gcloud compute instances add-metadata "${instance}" \
--project "${PROJECT}" \
--zone "${ZONE}" \
--metadata-from-file "$(join_csv ${kvs[@]})"; then
if (( attempt > 5 )); then
echo -e "${color_red}Failed to add instance metadata in ${instance} ${color_norm}" >&2
exit 2
fi
echo -e "${color_yellow}Attempt $(($attempt+1)) failed to add metadata in ${instance}. Retrying.${color_norm}" >&2
attempt=$(($attempt+1))
else
break
fi
done
}
# Quote something appropriate for a yaml string.
#
# TODO(zmerlynn): Note that this function doesn't so much "quote" as
# "strip out quotes", and we really should be using a YAML library for
# this, but PyYAML isn't shipped by default, and *rant rant rant ... SIGH*
function yaml-quote {
echo "'$(echo "${@}" | sed -e "s/'/''/g")'"
}
function write-master-env {
# If the user requested that the master be part of the cluster, set the
# environment variable to program the master kubelet to register itself.
if [[ "${REGISTER_MASTER_KUBELET:-}" == "true" ]]; then
KUBELET_APISERVER="${MASTER_NAME}"
fi
build-kube-env true "${KUBE_TEMP}/master-kube-env.yaml"
}
function write-node-env {
build-kube-env false "${KUBE_TEMP}/node-kube-env.yaml"
}
# Create certificate pairs for the cluster.
# $1: The public IP for the master.
#
# These are used for static cert distribution (e.g. static clustering) at
# cluster creation time. This will be obsoleted once we implement dynamic
# clustering.
#
# The following certificate pairs are created:
#
# - ca (the cluster's certificate authority)
# - server
# - kubelet
# - kubecfg (for kubectl)
#
# TODO(roberthbailey): Replace easyrsa with a simple Go program to generate
# the certs that we need.
#
# Assumed vars
# KUBE_TEMP
#
# Vars set:
# CERT_DIR
# CA_CERT_BASE64
# MASTER_CERT_BASE64
# MASTER_KEY_BASE64
# KUBELET_CERT_BASE64
# KUBELET_KEY_BASE64
# KUBECFG_CERT_BASE64
# KUBECFG_KEY_BASE64
function create-certs {
local -r cert_ip="${1}"
local octets=($(echo "$SERVICE_CLUSTER_IP_RANGE" | sed -e 's|/.*||' -e 's/\./ /g'))
((octets[3]+=1))
local -r service_ip=$(echo "${octets[*]}" | sed 's/ /./g')
local -r sans="IP:${cert_ip},IP:${service_ip},DNS:kubernetes,DNS:kubernetes.default,DNS:kubernetes.default.svc,DNS:kubernetes.default.svc.${DNS_DOMAIN},DNS:${MASTER_NAME}"
# Note: This was heavily cribbed from make-ca-cert.sh
(cd "${KUBE_TEMP}"
curl -L -O https://storage.googleapis.com/kubernetes-release/easy-rsa/easy-rsa.tar.gz > /dev/null 2>&1
tar xzf easy-rsa.tar.gz > /dev/null 2>&1
cd easy-rsa-master/easyrsa3
./easyrsa init-pki > /dev/null 2>&1
./easyrsa --batch "--req-cn=${cert_ip}@$(date +%s)" build-ca nopass > /dev/null 2>&1
./easyrsa --subject-alt-name="${sans}" build-server-full "${MASTER_NAME}" nopass > /dev/null 2>&1
./easyrsa build-client-full kubelet nopass > /dev/null 2>&1
./easyrsa build-client-full kubecfg nopass > /dev/null 2>&1) || {
# If there was an error in the subshell, just die.
# TODO(roberthbailey): add better error handling here
echo "=== Failed to generate certificates: Aborting ===" >&2
exit 2
}
CERT_DIR="${KUBE_TEMP}/easy-rsa-master/easyrsa3"
# By default, linux wraps base64 output every 76 cols, so we use 'tr -d' to remove whitespaces.
# Note 'base64 -w0' doesn't work on Mac OS X, which has different flags.
CA_CERT_BASE64=$(cat "${CERT_DIR}/pki/ca.crt" | base64 | tr -d '\r\n')
MASTER_CERT_BASE64=$(cat "${CERT_DIR}/pki/issued/${MASTER_NAME}.crt" | base64 | tr -d '\r\n')
MASTER_KEY_BASE64=$(cat "${CERT_DIR}/pki/private/${MASTER_NAME}.key" | base64 | tr -d '\r\n')
KUBELET_CERT_BASE64=$(cat "${CERT_DIR}/pki/issued/kubelet.crt" | base64 | tr -d '\r\n')
KUBELET_KEY_BASE64=$(cat "${CERT_DIR}/pki/private/kubelet.key" | base64 | tr -d '\r\n')
KUBECFG_CERT_BASE64=$(cat "${CERT_DIR}/pki/issued/kubecfg.crt" | base64 | tr -d '\r\n')
KUBECFG_KEY_BASE64=$(cat "${CERT_DIR}/pki/private/kubecfg.key" | base64 | tr -d '\r\n')
}
# Instantiate a kubernetes cluster
#
# Assumed vars
# KUBE_ROOT
# <Various vars set in config file>
function kube-up {
ensure-temp-dir
detect-project
gen-kube-basicauth
gen-kube-bearertoken
# Make sure we have the tar files staged on Google Storage
find-release-tars
upload-server-tars
local running_in_terminal=false
# May be false if tty is not allocated (for example with ssh -T).
if [ -t 1 ]; then
running_in_terminal=true
fi
if [[ ${running_in_terminal} == "true" || ${KUBE_UP_AUTOMATIC_CLEANUP} == "true" ]]; then
if ! check-resources; then
local run_kube_down="n"
echo "${KUBE_RESOURCE_FOUND} found." >&2
# Get user input only if running in terminal.
if [[ ${running_in_terminal} == "true" && ${KUBE_UP_AUTOMATIC_CLEANUP} == "false" ]]; then
read -p "Would you like to shut down the old cluster (call kube-down)? [y/N] " run_kube_down
fi
if [[ ${run_kube_down} == "y" || ${run_kube_down} == "Y" || ${KUBE_UP_AUTOMATIC_CLEANUP} == "true" ]]; then
echo "... calling kube-down" >&2
kube-down
fi
fi
fi
if ! gcloud compute networks --project "${PROJECT}" describe "${NETWORK}" &>/dev/null; then
echo "Creating new network: ${NETWORK}"
# The network needs to be created synchronously or we have a race. The
# firewalls can be added concurrent with instance creation.
gcloud compute networks create --project "${PROJECT}" "${NETWORK}" --range "10.240.0.0/16"
fi
if ! gcloud compute firewall-rules --project "${PROJECT}" describe "${NETWORK}-default-internal" &>/dev/null; then
gcloud compute firewall-rules create "${NETWORK}-default-internal" \
--project "${PROJECT}" \
--network "${NETWORK}" \
--source-ranges "10.0.0.0/8" \
--allow "tcp:1-65535,udp:1-65535,icmp" &
fi
if ! gcloud compute firewall-rules describe --project "${PROJECT}" "${NETWORK}-default-ssh" &>/dev/null; then
gcloud compute firewall-rules create "${NETWORK}-default-ssh" \
--project "${PROJECT}" \
--network "${NETWORK}" \
--source-ranges "0.0.0.0/0" \
--allow "tcp:22" &
fi
echo "Starting master and configuring firewalls"
gcloud compute firewall-rules create "${MASTER_NAME}-https" \
--project "${PROJECT}" \
--network "${NETWORK}" \
--target-tags "${MASTER_TAG}" \
--allow tcp:443 &
# We have to make sure the disk is created before creating the master VM, so
# run this in the foreground.
gcloud compute disks create "${MASTER_NAME}-pd" \
--project "${PROJECT}" \
--zone "${ZONE}" \
--type "${MASTER_DISK_TYPE}" \
--size "${MASTER_DISK_SIZE}"
# Create disk for cluster registry if enabled
if [[ "${ENABLE_CLUSTER_REGISTRY}" == true && -n "${CLUSTER_REGISTRY_DISK}" ]]; then
gcloud compute disks create "${CLUSTER_REGISTRY_DISK}" \
--project "${PROJECT}" \
--zone "${ZONE}" \
--type "${CLUSTER_REGISTRY_DISK_TYPE_GCE}" \
--size "${CLUSTER_REGISTRY_DISK_SIZE}" &
fi
# Generate a bearer token for this cluster. We push this separately
# from the other cluster variables so that the client (this
# computer) can forget it later. This should disappear with
# http://issue.k8s.io/3168
KUBELET_TOKEN=$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base64 | tr -d "=+/" | dd bs=32 count=1 2>/dev/null)
KUBE_PROXY_TOKEN=$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base64 | tr -d "=+/" | dd bs=32 count=1 2>/dev/null)
# Reserve the master's IP so that it can later be transferred to another VM
# without disrupting the kubelets. IPs are associated with regions, not zones,
# so extract the region name, which is the same as the zone but with the final
# dash and characters trailing the dash removed.
local REGION=${ZONE%-*}
create-static-ip "${MASTER_NAME}-ip" "${REGION}"
MASTER_RESERVED_IP=$(gcloud compute addresses describe "${MASTER_NAME}-ip" \
--project "${PROJECT}" \
--region "${REGION}" -q --format yaml | awk '/^address:/ { print $2 }')
create-certs "${MASTER_RESERVED_IP}"
create-master-instance "${MASTER_RESERVED_IP}" &
# Create a single firewall rule for all minions.
create-firewall-rule "${MINION_TAG}-all" "${CLUSTER_IP_RANGE}" "${MINION_TAG}" &
# Report logging choice (if any).
if [[ "${ENABLE_NODE_LOGGING-}" == "true" ]]; then
echo "+++ Logging using Fluentd to ${LOGGING_DESTINATION:-unknown}"
fi
# Wait for last batch of jobs
wait-for-jobs
echo "Creating minions."
# TODO(zmerlynn): Refactor setting scope flags.
local scope_flags=
if [ -n "${MINION_SCOPES}" ]; then
scope_flags="--scopes ${MINION_SCOPES}"
else
scope_flags="--no-scopes"
fi
write-node-env
local template_name="${NODE_INSTANCE_PREFIX}-template"
create-node-instance-template $template_name
gcloud compute instance-groups managed \
create "${NODE_INSTANCE_PREFIX}-group" \
--project "${PROJECT}" \
--zone "${ZONE}" \
--base-instance-name "${NODE_INSTANCE_PREFIX}" \
--size "${NUM_MINIONS}" \
--template "$template_name" || true;
gcloud compute instance-groups managed wait-until-stable \
"${NODE_INSTANCE_PREFIX}-group" \
--zone "${ZONE}" \
--project "${PROJECT}" || true;
detect-minion-names
detect-master
# Create autoscaler for nodes if requested
if [[ "${ENABLE_NODE_AUTOSCALER}" == "true" ]]; then
METRICS=""
# Current usage
METRICS+="--custom-metric-utilization metric=custom.cloudmonitoring.googleapis.com/kubernetes.io/cpu/node_utilization,"
METRICS+="utilization-target=${TARGET_NODE_UTILIZATION},utilization-target-type=GAUGE "
METRICS+="--custom-metric-utilization metric=custom.cloudmonitoring.googleapis.com/kubernetes.io/memory/node_utilization,"
METRICS+="utilization-target=${TARGET_NODE_UTILIZATION},utilization-target-type=GAUGE "
# Reservation
METRICS+="--custom-metric-utilization metric=custom.cloudmonitoring.googleapis.com/kubernetes.io/cpu/node_reservation,"
METRICS+="utilization-target=${TARGET_NODE_UTILIZATION},utilization-target-type=GAUGE "
METRICS+="--custom-metric-utilization metric=custom.cloudmonitoring.googleapis.com/kubernetes.io/memory/node_reservation,"
METRICS+="utilization-target=${TARGET_NODE_UTILIZATION},utilization-target-type=GAUGE "
echo "Creating node autoscaler."
gcloud compute instance-groups managed set-autoscaling "${NODE_INSTANCE_PREFIX}-group" --zone "${ZONE}" --project "${PROJECT}" \
--min-num-replicas "${AUTOSCALER_MIN_NODES}" --max-num-replicas "${AUTOSCALER_MAX_NODES}" ${METRICS} || true
fi
echo "Waiting up to ${KUBE_CLUSTER_INITIALIZATION_TIMEOUT} seconds for cluster initialization."
echo
echo " This will continually check to see if the API for kubernetes is reachable."
echo " This may time out if there was some uncaught error during start up."
echo
# curl in mavericks is borked.
secure=""
if which sw_vers > /dev/null; then
if [[ $(sw_vers | grep ProductVersion | awk '{print $2}') = "10.9."* ]]; then
secure="--insecure"
fi
fi
local start_time=$(date +%s)
until curl --cacert "${CERT_DIR}/pki/ca.crt" \
-H "Authorization: Bearer ${KUBE_BEARER_TOKEN}" \
${secure} \
--max-time 5 --fail --output /dev/null --silent \
"https://${KUBE_MASTER_IP}/api/v1/pods"; do
local elapsed=$(($(date +%s) - ${start_time}))
if [[ ${elapsed} -gt ${KUBE_CLUSTER_INITIALIZATION_TIMEOUT} ]]; then
echo -e "${color_red}Cluster failed to initialize within ${KUBE_CLUSTER_INITIALIZATION_TIMEOUT} seconds.${color_norm}" >&2
exit 2
fi
printf "."
sleep 2
done
echo "Kubernetes cluster created."
export KUBE_CERT="${CERT_DIR}/pki/issued/kubecfg.crt"
export KUBE_KEY="${CERT_DIR}/pki/private/kubecfg.key"
export CA_CERT="${CERT_DIR}/pki/ca.crt"
export CONTEXT="${PROJECT}_${INSTANCE_PREFIX}"
(
umask 077
create-kubeconfig
)
# ensures KUBECONFIG is set
get-kubeconfig-basicauth
echo
echo -e "${color_green}Kubernetes cluster is running. The master is running at:"
echo
echo -e "${color_yellow} https://${KUBE_MASTER_IP}"
echo
echo -e "${color_green}The user name and password to use is located in ${KUBECONFIG}.${color_norm}"
echo
}
# Delete a kubernetes cluster. This is called from test-teardown.
#
# Assumed vars:
# MASTER_NAME
# NODE_INSTANCE_PREFIX
# ZONE
# This function tears down cluster resources 10 at a time to avoid issuing too many
# API calls and exceeding API quota. It is important to bring down the instances before bringing
# down the firewall rules and routes.
function kube-down {
detect-project
echo "Bringing down cluster"
set +e # Do not stop on error
# Delete autoscaler for nodes if present.
local autoscaler
autoscaler=( $(gcloud compute instance-groups managed list --zone "${ZONE}" --project "${PROJECT}" \
| grep "${NODE_INSTANCE_PREFIX}-group" \
| awk '{print $7}') )
if [[ "${autoscaler:-}" == "yes" ]]; then
gcloud compute instance-groups managed stop-autoscaling "${NODE_INSTANCE_PREFIX}-group" --zone "${ZONE}" --project "${PROJECT}"
fi
# Get the name of the managed instance group template before we delete the
# managed instange group. (The name of the managed instnace group template may
# change during a cluster upgrade.)
local template=$(get-template "${PROJECT}" "${ZONE}" "${NODE_INSTANCE_PREFIX}-group")
# The gcloud APIs don't return machine parseable error codes/retry information. Therefore the best we can
# do is parse the output and special case particular responses we are interested in.
if gcloud compute instance-groups managed describe "${NODE_INSTANCE_PREFIX}-group" --project "${PROJECT}" --zone "${ZONE}" &>/dev/null; then
deleteCmdOutput=$(gcloud compute instance-groups managed delete --zone "${ZONE}" \
--project "${PROJECT}" \
--quiet \
"${NODE_INSTANCE_PREFIX}-group")
if [[ "$deleteCmdOutput" != "" ]]; then
# Managed instance group deletion is done asynchronously, we must wait for it to complete, or subsequent steps fail
deleteCmdOperationId=$(echo $deleteCmdOutput | grep "Operation:" | sed "s/.*Operation:[[:space:]]*\([^[:space:]]*\).*/\1/g")
if [[ "$deleteCmdOperationId" != "" ]]; then
deleteCmdStatus="PENDING"
while [[ "$deleteCmdStatus" != "DONE" ]]
do
sleep 5
deleteCmdOperationOutput=$(gcloud compute instance-groups managed --zone "${ZONE}" --project "${PROJECT}" get-operation $deleteCmdOperationId)
deleteCmdStatus=$(echo $deleteCmdOperationOutput | grep -i "status:" | sed "s/.*status:[[:space:]]*\([^[:space:]]*\).*/\1/g")
echo "Waiting for MIG deletion to complete. Current status: " $deleteCmdStatus
done
fi
fi
fi
if gcloud compute instance-templates describe --project "${PROJECT}" "${template}" &>/dev/null; then
gcloud compute instance-templates delete \
--project "${PROJECT}" \
--quiet \
"${template}"
fi
# First delete the master (if it exists).
if gcloud compute instances describe "${MASTER_NAME}" --zone "${ZONE}" --project "${PROJECT}" &>/dev/null; then
gcloud compute instances delete \
--project "${PROJECT}" \
--quiet \
--delete-disks all \
--zone "${ZONE}" \
"${MASTER_NAME}"
fi
# Delete the master pd (possibly leaked by kube-up if master create failed).
if gcloud compute disks describe "${MASTER_NAME}"-pd --zone "${ZONE}" --project "${PROJECT}" &>/dev/null; then
gcloud compute disks delete \
--project "${PROJECT}" \
--quiet \
--zone "${ZONE}" \
"${MASTER_NAME}"-pd
fi
# Delete disk for cluster registry if enabled
if [[ "${ENABLE_CLUSTER_REGISTRY}" == true && -n "${CLUSTER_REGISTRY_DISK}" ]]; then
if gcloud compute disks describe "${CLUSTER_REGISTRY_DISK}" --zone "${ZONE}" --project "${PROJECT}" &>/dev/null; then
gcloud compute disks delete \
--project "${PROJECT}" \
--quiet \
--zone "${ZONE}" \
"${CLUSTER_REGISTRY_DISK}"
fi
fi
# Find out what minions are running.
local -a minions
minions=( $(gcloud compute instances list \
--project "${PROJECT}" --zone "${ZONE}" \
--regexp "${NODE_INSTANCE_PREFIX}-.+" \
| awk 'NR >= 2 { print $1 }') )
# If any minions are running, delete them in batches.
while (( "${#minions[@]}" > 0 )); do
echo Deleting nodes "${minions[*]::10}"
gcloud compute instances delete \
--project "${PROJECT}" \
--quiet \
--delete-disks boot \
--zone "${ZONE}" \
"${minions[@]::10}"
minions=( "${minions[@]:10}" )
done
# Delete firewall rule for the master.
if gcloud compute firewall-rules describe --project "${PROJECT}" "${MASTER_NAME}-https" &>/dev/null; then
gcloud compute firewall-rules delete \
--project "${PROJECT}" \
--quiet \
"${MASTER_NAME}-https"
fi
# Delete firewall rule for minions.
if gcloud compute firewall-rules describe --project "${PROJECT}" "${MINION_TAG}-all" &>/dev/null; then
gcloud compute firewall-rules delete \
--project "${PROJECT}" \
--quiet \
"${MINION_TAG}-all"
fi
# Delete routes.
local -a routes
# Clean up all routes w/ names like "<cluster-name>-<node-GUID>"
# e.g. "kubernetes-12345678-90ab-cdef-1234-567890abcdef". The name is
# determined by the node controller on the master.
# Note that this is currently a noop, as synchronously deleting the node MIG
# first allows the master to cleanup routes itself.
local TRUNCATED_PREFIX="${INSTANCE_PREFIX:0:26}"
routes=( $(gcloud compute routes list --project "${PROJECT}" \
--regexp "${TRUNCATED_PREFIX}-.{8}-.{4}-.{4}-.{4}-.{12}" | awk 'NR >= 2 { print $1 }') )
while (( "${#routes[@]}" > 0 )); do
echo Deleting routes "${routes[*]::10}"
gcloud compute routes delete \
--project "${PROJECT}" \
--quiet \
"${routes[@]::10}"
routes=( "${routes[@]:10}" )
done
# Delete the master's reserved IP
local REGION=${ZONE%-*}
if gcloud compute addresses describe "${MASTER_NAME}-ip" --region "${REGION}" --project "${PROJECT}" &>/dev/null; then
gcloud compute addresses delete \
--project "${PROJECT}" \
--region "${REGION}" \
--quiet \
"${MASTER_NAME}-ip"
fi
export CONTEXT="${PROJECT}_${INSTANCE_PREFIX}"
clear-kubeconfig
set -e
}
# Gets the instance template for the managed instance group with the provided
# project, zone, and group name. It echos the template name so that the function
# output can be used.
#
# $1: project
# $2: zone
# $3: managed instance group name
function get-template {
# url is set to https://www.googleapis.com/compute/v1/projects/$1/global/instanceTemplates/<template>
local url=$(gcloud compute instance-groups managed describe --project="${1}" --zone="${2}" "${3}" | grep instanceTemplate)
# template is set to <template> (the pattern strips off all but last slash)
local template="${url##*/}"
echo "${template}"
}
# Checks if there are any present resources related kubernetes cluster.
#
# Assumed vars:
# MASTER_NAME
# NODE_INSTANCE_PREFIX
# ZONE
# Vars set:
# KUBE_RESOURCE_FOUND
function check-resources {
detect-project
echo "Looking for already existing resources"
KUBE_RESOURCE_FOUND=""
if gcloud compute instance-groups managed describe --project "${PROJECT}" --zone "${ZONE}" "${NODE_INSTANCE_PREFIX}-group" &>/dev/null; then
KUBE_RESOURCE_FOUND="Managed instance group ${NODE_INSTANCE_PREFIX}-group"
return 1
fi
if gcloud compute instance-templates describe --project "${PROJECT}" "${NODE_INSTANCE_PREFIX}-template" &>/dev/null; then
KUBE_RESOURCE_FOUND="Instance template ${NODE_INSTANCE_PREFIX}-template"
return 1
fi
if gcloud compute instances describe --project "${PROJECT}" "${MASTER_NAME}" --zone "${ZONE}" &>/dev/null; then
KUBE_RESOURCE_FOUND="Kubernetes master ${MASTER_NAME}"
return 1
fi
if gcloud compute disks describe --project "${PROJECT}" "${MASTER_NAME}"-pd --zone "${ZONE}" &>/dev/null; then
KUBE_RESOURCE_FOUND="Persistent disk ${MASTER_NAME}-pd"
return 1
fi
if gcloud compute disks describe --project "${PROJECT}" "${CLUSTER_REGISTRY_DISK}" --zone "${ZONE}" &>/dev/null; then
KUBE_RESOURCE_FOUND="Persistent disk ${CLUSTER_REGISTRY_DISK}"
return 1
fi
# Find out what minions are running.
local -a minions
minions=( $(gcloud compute instances list \
--project "${PROJECT}" --zone "${ZONE}" \
--regexp "${NODE_INSTANCE_PREFIX}-.+" \
| awk 'NR >= 2 { print $1 }') )
if (( "${#minions[@]}" > 0 )); then
KUBE_RESOURCE_FOUND="${#minions[@]} matching matching ${NODE_INSTANCE_PREFIX}-.+"
return 1