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util.sh
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util.sh
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#!/bin/bash
# Copyright 2014 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.
# A library of helper functions and constant for the local config.
# Experimental flags can be removed/renamed at any time.
# The intent is to allow experimentation/advanced functionality before we
# are ready to commit to supporting it.
# Experimental functionality:
# KUBE_USE_EXISTING_MASTER=true
# Detect and reuse an existing master; useful if you want to
# create more nodes, perhaps with a different instance type or in
# a different subnet/AZ
# KUBE_SUBNET_CIDR=172.20.1.0/24
# Override the default subnet CIDR; useful if you want to create
# a second subnet. The default subnet is 172.20.0.0/24. The VPC
# is created with 172.20.0.0/16; you must pick a sub-CIDR of that.
# Use the config file specified in $KUBE_CONFIG_FILE, or default to
# config-default.sh.
KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
source "${KUBE_ROOT}/cluster/aws/${KUBE_CONFIG_FILE-"config-default.sh"}"
source "${KUBE_ROOT}/cluster/common.sh"
source "${KUBE_ROOT}/cluster/lib/util.sh"
ALLOCATE_NODE_CIDRS=true
NODE_INSTANCE_PREFIX="${INSTANCE_PREFIX}-minion"
# The Auto Scaling Group (ASG) name must be unique, so we include the zone
ASG_NAME="${NODE_INSTANCE_PREFIX}-group-${ZONE}"
# We could allow the master disk volume id to be specified in future
MASTER_DISK_ID=
# Well known tags
TAG_KEY_MASTER_IP="kubernetes.io/master-ip"
OS_DISTRIBUTION=${KUBE_OS_DISTRIBUTION}
# Defaults: ubuntu -> wily
if [[ "${OS_DISTRIBUTION}" == "ubuntu" ]]; then
OS_DISTRIBUTION=wily
fi
# Loads the distro-specific utils script.
# If the distro is not recommended, prints warnings or exits.
function load_distro_utils () {
case "${OS_DISTRIBUTION}" in
jessie)
;;
wily)
;;
vivid)
echo "vivid is no longer supported by kube-up; please use jessie instead" >&2
exit 2
;;
coreos)
echo "coreos is no longer supported by kube-up; please use jessie instead" >&2
exit 2
;;
trusty)
echo "trusty is no longer supported by kube-up; please use jessie or wily instead" >&2
exit 2
;;
wheezy)
echo "wheezy is no longer supported by kube-up; please use jessie instead" >&2
exit 2
;;
*)
echo "Cannot start cluster using os distro: ${OS_DISTRIBUTION}" >&2
echo "The current recommended distro is jessie" >&2
exit 2
;;
esac
source "${KUBE_ROOT}/cluster/aws/${OS_DISTRIBUTION}/util.sh"
}
load_distro_utils
# This removes the final character in bash (somehow)
re='[a-zA-Z]'
if [[ ${ZONE: -1} =~ $re ]]; then
AWS_REGION=${ZONE%?}
else
AWS_REGION=$ZONE
fi
export AWS_DEFAULT_REGION=${AWS_REGION}
export AWS_DEFAULT_OUTPUT=text
AWS_CMD="aws ec2"
AWS_ASG_CMD="aws autoscaling"
VPC_CIDR_BASE=${KUBE_VPC_CIDR_BASE:-172.20}
MASTER_IP_SUFFIX=.9
VPC_CIDR=${VPC_CIDR_BASE}.0.0/16
SUBNET_CIDR=${VPC_CIDR_BASE}.0.0/24
if [[ -n "${KUBE_SUBNET_CIDR:-}" ]]; then
echo "Using subnet CIDR override: ${KUBE_SUBNET_CIDR}"
SUBNET_CIDR=${KUBE_SUBNET_CIDR}
fi
if [[ -z "${MASTER_INTERNAL_IP-}" ]]; then
MASTER_INTERNAL_IP="${SUBNET_CIDR%.*}${MASTER_IP_SUFFIX}"
fi
MASTER_SG_NAME="kubernetes-master-${CLUSTER_ID}"
NODE_SG_NAME="kubernetes-minion-${CLUSTER_ID}"
IAM_PROFILE_MASTER="kubernetes-master-${CLUSTER_ID}-${VPC_NAME}"
IAM_PROFILE_NODE="kubernetes-minion-${CLUSTER_ID}-${VPC_NAME}"
# Be sure to map all the ephemeral drives. We can specify more than we actually have.
# TODO: Actually mount the correct number (especially if we have more), though this is non-trivial, and
# only affects the big storage instance types, which aren't a typical use case right now.
EPHEMERAL_BLOCK_DEVICE_MAPPINGS=",{\"DeviceName\": \"/dev/sdc\",\"VirtualName\":\"ephemeral0\"},{\"DeviceName\": \"/dev/sdd\",\"VirtualName\":\"ephemeral1\"},{\"DeviceName\": \"/dev/sde\",\"VirtualName\":\"ephemeral2\"},{\"DeviceName\": \"/dev/sdf\",\"VirtualName\":\"ephemeral3\"}"
# Experimental: If the user sets KUBE_AWS_STORAGE to ebs, use ebs storage
# in preference to local instance storage We do this by not mounting any
# instance storage. We could do this better in future (e.g. making instance
# storage available for other purposes)
if [[ "${KUBE_AWS_STORAGE:-}" == "ebs" ]]; then
EPHEMERAL_BLOCK_DEVICE_MAPPINGS=""
fi
# TODO (bburns) Parameterize this for multiple cluster per project
function get_vpc_id {
$AWS_CMD describe-vpcs \
--filters Name=tag:Name,Values=${VPC_NAME} \
Name=tag:KubernetesCluster,Values=${CLUSTER_ID} \
--query Vpcs[].VpcId
}
function get_subnet_id {
local vpc_id=$1
local az=$2
$AWS_CMD describe-subnets \
--filters Name=tag:KubernetesCluster,Values=${CLUSTER_ID} \
Name=availabilityZone,Values=${az} \
Name=vpc-id,Values=${vpc_id} \
--query Subnets[].SubnetId
}
function get_igw_id {
local vpc_id=$1
$AWS_CMD describe-internet-gateways \
--filters Name=attachment.vpc-id,Values=${vpc_id} \
--query InternetGateways[].InternetGatewayId
}
function get_elbs_in_vpc {
# ELB doesn't seem to be on the same platform as the rest of AWS; doesn't support filtering
aws elb --output json describe-load-balancers | \
python -c "import json,sys; lst = [str(lb['LoadBalancerName']) for lb in json.load(sys.stdin)['LoadBalancerDescriptions'] if 'VPCId' in lb and lb['VPCId'] == '$1']; print('\n'.join(lst))"
}
function get_instanceid_from_name {
local tagName=$1
$AWS_CMD describe-instances \
--filters Name=tag:Name,Values=${tagName} \
Name=instance-state-name,Values=running \
Name=tag:KubernetesCluster,Values=${CLUSTER_ID} \
--query Reservations[].Instances[].InstanceId
}
function get_instance_public_ip {
local instance_id=$1
$AWS_CMD describe-instances \
--instance-ids ${instance_id} \
--query Reservations[].Instances[].NetworkInterfaces[0].Association.PublicIp
}
function get_instance_private_ip {
local instance_id=$1
$AWS_CMD describe-instances \
--instance-ids ${instance_id} \
--query Reservations[].Instances[].NetworkInterfaces[0].PrivateIpAddress
}
# Gets a security group id, by name ($1)
function get_security_group_id {
local name=$1
$AWS_CMD describe-security-groups \
--filters Name=vpc-id,Values=${VPC_ID} \
Name=group-name,Values=${name} \
Name=tag:KubernetesCluster,Values=${CLUSTER_ID} \
--query SecurityGroups[].GroupId \
| tr "\t" "\n"
}
# Finds the master ip, if it is saved (tagged on the master disk)
# Sets KUBE_MASTER_IP
function find-tagged-master-ip {
find-master-pd
if [[ -n "${MASTER_DISK_ID:-}" ]]; then
KUBE_MASTER_IP=$(get-tag ${MASTER_DISK_ID} ${TAG_KEY_MASTER_IP})
fi
}
# Gets a tag value from an AWS resource
# usage: get-tag <resource-id> <tag-name>
# outputs: the tag value, or "" if no tag
function get-tag {
$AWS_CMD describe-tags --filters Name=resource-id,Values=${1} \
Name=key,Values=${2} \
--query Tags[].Value
}
# Gets an existing master, exiting if not found
# Note that this is called directly by the e2e tests
function detect-master() {
find-tagged-master-ip
KUBE_MASTER=${MASTER_NAME}
if [[ -z "${KUBE_MASTER_IP:-}" ]]; then
echo "Could not detect Kubernetes master node IP. Make sure you've launched a cluster with 'kube-up.sh'"
exit 1
fi
echo "Using master: $KUBE_MASTER (external IP: $KUBE_MASTER_IP)"
}
# Reads kube-env metadata from master
#
# Assumed vars:
# KUBE_MASTER_IP
# AWS_SSH_KEY
# SSH_USER
function get-master-env() {
ssh -oStrictHostKeyChecking=no -i "${AWS_SSH_KEY}" ${SSH_USER}@${KUBE_MASTER_IP} sudo cat /etc/kubernetes/kube_env.yaml
}
function query-running-minions () {
local query=$1
$AWS_CMD describe-instances \
--filters Name=instance-state-name,Values=running \
Name=vpc-id,Values=${VPC_ID} \
Name=tag:KubernetesCluster,Values=${CLUSTER_ID} \
Name=tag:aws:autoscaling:groupName,Values=${ASG_NAME} \
Name=tag:Role,Values=${NODE_TAG} \
--query ${query}
}
function detect-node-names () {
# If this is called directly, VPC_ID might not be set
# (this is case from cluster/log-dump.sh)
if [[ -z "${VPC_ID:-}" ]]; then
VPC_ID=$(get_vpc_id)
fi
NODE_IDS=()
NODE_NAMES=()
for id in $(query-running-minions "Reservations[].Instances[].InstanceId"); do
NODE_IDS+=("${id}")
# We use the minion ids as the name
NODE_NAMES+=("${id}")
done
}
# Called to detect the project on GCE
# Not needed on AWS
function detect-project() {
:
}
function detect-nodes () {
detect-node-names
# This is inefficient, but we want NODE_NAMES / NODE_IDS to be ordered the same as KUBE_NODE_IP_ADDRESSES
KUBE_NODE_IP_ADDRESSES=()
for (( i=0; i<${#NODE_NAMES[@]}; i++)); do
local minion_ip
if [[ "${ENABLE_NODE_PUBLIC_IP}" == "true" ]]; then
minion_ip=$(get_instance_public_ip ${NODE_NAMES[$i]})
else
minion_ip=$(get_instance_private_ip ${NODE_NAMES[$i]})
fi
echo "Found minion ${i}: ${NODE_NAMES[$i]} @ ${minion_ip}"
KUBE_NODE_IP_ADDRESSES+=("${minion_ip}")
done
if [[ -z "$KUBE_NODE_IP_ADDRESSES" ]]; then
echo "Could not detect Kubernetes minion nodes. Make sure you've launched a cluster with 'kube-up.sh'"
exit 1
fi
}
function detect-security-groups {
if [[ -z "${MASTER_SG_ID-}" ]]; then
MASTER_SG_ID=$(get_security_group_id "${MASTER_SG_NAME}")
if [[ -z "${MASTER_SG_ID}" ]]; then
echo "Could not detect Kubernetes master security group. Make sure you've launched a cluster with 'kube-up.sh'"
exit 1
else
echo "Using master security group: ${MASTER_SG_NAME} ${MASTER_SG_ID}"
fi
fi
if [[ -z "${NODE_SG_ID-}" ]]; then
NODE_SG_ID=$(get_security_group_id "${NODE_SG_NAME}")
if [[ -z "${NODE_SG_ID}" ]]; then
echo "Could not detect Kubernetes minion security group. Make sure you've launched a cluster with 'kube-up.sh'"
exit 1
else
echo "Using minion security group: ${NODE_SG_NAME} ${NODE_SG_ID}"
fi
fi
}
# Detects the AMI to use (considering the region)
# This really should be in the various distro-specific util functions,
# but CoreOS uses this for the master, so for now it is here.
#
# TODO: Remove this and just have each distro implement detect-image
#
# Vars set:
# AWS_IMAGE
function detect-image () {
case "${OS_DISTRIBUTION}" in
wily)
detect-wily-image
;;
jessie)
detect-jessie-image
;;
*)
echo "Please specify AWS_IMAGE directly (distro ${OS_DISTRIBUTION} not recognized)"
exit 2
;;
esac
}
# Detects the RootDevice to use in the Block Device Mapping (considering the AMI)
#
# Vars set:
# MASTER_BLOCK_DEVICE_MAPPINGS
# NODE_BLOCK_DEVICE_MAPPINGS
#
function detect-root-device {
local master_image=${AWS_IMAGE}
local node_image=${KUBE_NODE_IMAGE}
ROOT_DEVICE_MASTER=$($AWS_CMD describe-images --image-ids ${master_image} --query 'Images[].RootDeviceName')
if [[ "${master_image}" == "${node_image}" ]]; then
ROOT_DEVICE_NODE=${ROOT_DEVICE_MASTER}
else
ROOT_DEVICE_NODE=$($AWS_CMD describe-images --image-ids ${node_image} --query 'Images[].RootDeviceName')
fi
MASTER_BLOCK_DEVICE_MAPPINGS="[{\"DeviceName\":\"${ROOT_DEVICE_MASTER}\",\"Ebs\":{\"DeleteOnTermination\":true,\"VolumeSize\":${MASTER_ROOT_DISK_SIZE},\"VolumeType\":\"${MASTER_ROOT_DISK_TYPE}\"}} ${EPHEMERAL_BLOCK_DEVICE_MAPPINGS}]"
NODE_BLOCK_DEVICE_MAPPINGS="[{\"DeviceName\":\"${ROOT_DEVICE_NODE}\",\"Ebs\":{\"DeleteOnTermination\":true,\"VolumeSize\":${NODE_ROOT_DISK_SIZE},\"VolumeType\":\"${NODE_ROOT_DISK_TYPE}\"}} ${EPHEMERAL_BLOCK_DEVICE_MAPPINGS}]"
}
# Computes the AWS fingerprint for a public key file ($1)
# $1: path to public key file
# Note that this is a different hash from the OpenSSH hash.
# But AWS gives us this public key hash in the describe keys output, so we should stick with this format.
# Hopefully this will be done by the aws cli tool one day: https://github.com/aws/aws-cli/issues/191
# NOTE: This does not work on Mavericks, due to an odd ssh-keygen version, so we use get-ssh-fingerprint instead
function get-aws-fingerprint {
local -r pubkey_path=$1
ssh-keygen -f ${pubkey_path} -e -m PKCS8 | openssl rsa -pubin -outform DER | openssl md5 -c | sed -e 's/(stdin)= //g'
}
# Computes the SSH fingerprint for a public key file ($1)
# #1: path to public key file
# Note this is different from the AWS fingerprint; see notes on get-aws-fingerprint
function get-ssh-fingerprint {
local -r pubkey_path=$1
ssh-keygen -lf ${pubkey_path} | cut -f2 -d' '
}
# Import an SSH public key to AWS.
# Ignores duplicate names; recommended to use a name that includes the public key hash.
# $1 name
# $2 public key path
function import-public-key {
local -r name=$1
local -r path=$2
local ok=1
local output=""
output=$($AWS_CMD import-key-pair --key-name ${name} --public-key-material "file://${path}" 2>&1) || ok=0
if [[ ${ok} == 0 ]]; then
# Idempotency: ignore if duplicate name
if [[ "${output}" != *"InvalidKeyPair.Duplicate"* ]]; then
echo "Error importing public key"
echo "Output: ${output}"
exit 1
fi
fi
}
# Robustly try to create a security group, if it does not exist.
# $1: The name of security group; will be created if not exists
# $2: Description for security group (used if created)
#
# Note that this doesn't actually return the sgid; we need to re-query
function create-security-group {
local -r name=$1
local -r description=$2
local sgid=$(get_security_group_id "${name}")
if [[ -z "$sgid" ]]; then
echo "Creating security group ${name}."
sgid=$($AWS_CMD create-security-group --group-name "${name}" --description "${description}" --vpc-id "${VPC_ID}" --query GroupId)
add-tag $sgid KubernetesCluster ${CLUSTER_ID}
fi
}
# Authorize ingress to a security group.
# Attempts to be idempotent, though we end up checking the output looking for error-strings.
# $1 group-id
# $2.. arguments to pass to authorize-security-group-ingress
function authorize-security-group-ingress {
local -r sgid=$1
shift
local ok=1
local output=""
output=$($AWS_CMD authorize-security-group-ingress --group-id "${sgid}" $@ 2>&1) || ok=0
if [[ ${ok} == 0 ]]; then
# Idempotency: ignore if duplicate rule
if [[ "${output}" != *"InvalidPermission.Duplicate"* ]]; then
echo "Error creating security group ingress rule"
echo "Output: ${output}"
exit 1
fi
fi
}
# Gets master persistent volume, if exists
# Sets MASTER_DISK_ID
function find-master-pd {
local name=${MASTER_NAME}-pd
if [[ -z "${MASTER_DISK_ID}" ]]; then
local zone_filter="Name=availability-zone,Values=${ZONE}"
if [[ "${KUBE_USE_EXISTING_MASTER:-}" == "true" ]]; then
# If we're reusing an existing master, it is likely to be in another zone
# If running multizone, your cluster must be uniquely named across zones
zone_filter=""
fi
MASTER_DISK_ID=`$AWS_CMD describe-volumes \
--filters ${zone_filter} \
Name=tag:Name,Values=${name} \
Name=tag:KubernetesCluster,Values=${CLUSTER_ID} \
--query Volumes[].VolumeId`
fi
}
# Gets or creates master persistent volume
# Sets MASTER_DISK_ID
function ensure-master-pd {
local name=${MASTER_NAME}-pd
find-master-pd
if [[ -z "${MASTER_DISK_ID}" ]]; then
echo "Creating master disk: size ${MASTER_DISK_SIZE}GB, type ${MASTER_DISK_TYPE}"
MASTER_DISK_ID=`$AWS_CMD create-volume --availability-zone ${ZONE} --volume-type ${MASTER_DISK_TYPE} --size ${MASTER_DISK_SIZE} --query VolumeId`
add-tag ${MASTER_DISK_ID} Name ${name}
add-tag ${MASTER_DISK_ID} KubernetesCluster ${CLUSTER_ID}
fi
}
# Configures a CloudWatch alarm to reboot the instance on failure
function reboot-on-failure {
local instance_id=$1
echo "Creating Cloudwatch alarm to reboot instance ${instance_id} on failure"
local aws_owner_id=`aws ec2 describe-instances --instance-ids ${instance_id} --query Reservations[0].OwnerId`
if [[ -z "${aws_owner_id}" ]]; then
echo "Unable to determinate AWS account id for ${instance_id}"
exit 1
fi
aws cloudwatch put-metric-alarm \
--alarm-name k8s-${instance_id}-statuscheckfailure-reboot \
--alarm-description "Reboot ${instance_id} on status check failure" \
--namespace "AWS/EC2" \
--dimensions Name=InstanceId,Value=${instance_id} \
--statistic Minimum \
--metric-name StatusCheckFailed \
--comparison-operator GreaterThanThreshold \
--threshold 0 \
--period 60 \
--evaluation-periods 3 \
--alarm-actions arn:aws:swf:${AWS_REGION}:${aws_owner_id}:action/actions/AWS_EC2.InstanceId.Reboot/1.0 > $LOG
# TODO: The IAM role EC2ActionsAccess must have been created
# See e.g. http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/UsingIAM.html
}
function delete-instance-alarms {
local instance_id=$1
alarm_names=`aws cloudwatch describe-alarms --alarm-name-prefix k8s-${instance_id}- --query MetricAlarms[].AlarmName`
for alarm_name in ${alarm_names}; do
aws cloudwatch delete-alarms --alarm-names ${alarm_name} > $LOG
done
}
# Finds the existing master IP, or creates/reuses an Elastic IP
# If MASTER_RESERVED_IP looks like an IP address, we will use it;
# otherwise we will create a new elastic IP
# Sets KUBE_MASTER_IP
function ensure-master-ip {
find-tagged-master-ip
if [[ -z "${KUBE_MASTER_IP:-}" ]]; then
# Check if MASTER_RESERVED_IP looks like an IPv4 address
# Note that we used to only allocate an elastic IP when MASTER_RESERVED_IP=auto
# So be careful changing the IPV4 test, to be sure that 'auto' => 'allocate'
if [[ "${MASTER_RESERVED_IP}" =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
KUBE_MASTER_IP="${MASTER_RESERVED_IP}"
else
KUBE_MASTER_IP=`$AWS_CMD allocate-address --domain vpc --query PublicIp`
echo "Allocated Elastic IP for master: ${KUBE_MASTER_IP}"
fi
# We can't tag elastic ips. Instead we put the tag on the persistent disk.
# It is a little weird, perhaps, but it sort of makes sense...
# The master mounts the master PD, and whoever mounts the master PD should also
# have the master IP
add-tag ${MASTER_DISK_ID} ${TAG_KEY_MASTER_IP} ${KUBE_MASTER_IP}
fi
}
# Creates a new DHCP option set configured correctly for Kubernetes when DHCP_OPTION_SET_ID is not specified
# Sets DHCP_OPTION_SET_ID
function create-dhcp-option-set () {
if [[ -z ${DHCP_OPTION_SET_ID-} ]]; then
case "${AWS_REGION}" in
us-east-1)
OPTION_SET_DOMAIN=ec2.internal
;;
*)
OPTION_SET_DOMAIN="${AWS_REGION}.compute.internal"
esac
DHCP_OPTION_SET_ID=$($AWS_CMD create-dhcp-options --dhcp-configuration Key=domain-name,Values=${OPTION_SET_DOMAIN} Key=domain-name-servers,Values=AmazonProvidedDNS --query DhcpOptions.DhcpOptionsId)
add-tag ${DHCP_OPTION_SET_ID} Name kubernetes-dhcp-option-set
add-tag ${DHCP_OPTION_SET_ID} KubernetesCluster ${CLUSTER_ID}
fi
$AWS_CMD associate-dhcp-options --dhcp-options-id ${DHCP_OPTION_SET_ID} --vpc-id ${VPC_ID} > $LOG
echo "Using DHCP option set ${DHCP_OPTION_SET_ID}"
}
# Verify prereqs
function verify-prereqs {
if [[ "$(which aws)" == "" ]]; then
echo "Can't find aws in PATH, please fix and retry."
exit 1
fi
}
# 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 "${KUBE_TEMP}"' EXIT
fi
}
# Take the local tar files and upload them to S3. They will then be
# downloaded by the master as part of the start up script for the master.
#
# Assumed vars:
# SERVER_BINARY_TAR
# SALT_TAR
# Vars set:
# SERVER_BINARY_TAR_URL
# SALT_TAR_URL
function upload-server-tars() {
SERVER_BINARY_TAR_URL=
SERVER_BINARY_TAR_HASH=
SALT_TAR_URL=
SALT_TAR_HASH=
BOOTSTRAP_SCRIPT_URL=
BOOTSTRAP_SCRIPT_HASH=
ensure-temp-dir
SERVER_BINARY_TAR_HASH=$(sha1sum-file "${SERVER_BINARY_TAR}")
SALT_TAR_HASH=$(sha1sum-file "${SALT_TAR}")
BOOTSTRAP_SCRIPT_HASH=$(sha1sum-file "${BOOTSTRAP_SCRIPT}")
if [[ -z ${AWS_S3_BUCKET-} ]]; then
local project_hash=
local key=$(aws configure get aws_access_key_id)
if which md5 > /dev/null 2>&1; then
project_hash=$(md5 -q -s "${USER} ${key} ${INSTANCE_PREFIX}")
else
project_hash=$(echo -n "${USER} ${key} ${INSTANCE_PREFIX}" | md5sum | awk '{ print $1 }')
fi
AWS_S3_BUCKET="kubernetes-staging-${project_hash}"
fi
echo "Uploading to Amazon S3"
if ! aws s3api get-bucket-location --bucket ${AWS_S3_BUCKET} > /dev/null 2>&1 ; then
echo "Creating ${AWS_S3_BUCKET}"
# Buckets must be globally uniquely named, so always create in a known region
# We default to us-east-1 because that's the canonical region for S3,
# and then the bucket is most-simply named (s3.amazonaws.com)
aws s3 mb "s3://${AWS_S3_BUCKET}" --region ${AWS_S3_REGION}
echo "Confirming bucket was created..."
local attempt=0
while true; do
if ! aws s3 ls --region ${AWS_S3_REGION} "s3://${AWS_S3_BUCKET}" > /dev/null 2>&1; then
if (( attempt > 120 )); then
echo
echo -e "${color_red}Unable to confirm bucket creation." >&2
echo "Please ensure that s3://${AWS_S3_BUCKET} exists" >&2
echo -e "and run the script again. (sorry!)${color_norm}" >&2
exit 1
fi
else
break
fi
attempt=$(($attempt+1))
sleep 1
done
fi
local s3_bucket_location=$(aws s3api get-bucket-location --bucket ${AWS_S3_BUCKET})
local s3_url_base=https://s3-${s3_bucket_location}.amazonaws.com
if [[ "${s3_bucket_location}" == "None" ]]; then
# "US Classic" does not follow the pattern
s3_url_base=https://s3.amazonaws.com
s3_bucket_location=us-east-1
elif [[ "${s3_bucket_location}" == "cn-north-1" ]]; then
s3_url_base=https://s3.cn-north-1.amazonaws.com.cn
fi
local -r staging_path="devel"
local -r local_dir="${KUBE_TEMP}/s3/"
mkdir ${local_dir}
echo "+++ Staging server tars to S3 Storage: ${AWS_S3_BUCKET}/${staging_path}"
cp -a "${SERVER_BINARY_TAR}" ${local_dir}
cp -a "${SALT_TAR}" ${local_dir}
cp -a "${BOOTSTRAP_SCRIPT}" ${local_dir}
aws s3 sync --region ${s3_bucket_location} --exact-timestamps ${local_dir} "s3://${AWS_S3_BUCKET}/${staging_path}/"
local server_binary_path="${staging_path}/${SERVER_BINARY_TAR##*/}"
aws s3api put-object-acl --region ${s3_bucket_location} --bucket ${AWS_S3_BUCKET} --key "${server_binary_path}" --grant-read 'uri="http://acs.amazonaws.com/groups/global/AllUsers"'
SERVER_BINARY_TAR_URL="${s3_url_base}/${AWS_S3_BUCKET}/${server_binary_path}"
local salt_tar_path="${staging_path}/${SALT_TAR##*/}"
aws s3api put-object-acl --region ${s3_bucket_location} --bucket ${AWS_S3_BUCKET} --key "${salt_tar_path}" --grant-read 'uri="http://acs.amazonaws.com/groups/global/AllUsers"'
SALT_TAR_URL="${s3_url_base}/${AWS_S3_BUCKET}/${salt_tar_path}"
local bootstrap_script_path="${staging_path}/${BOOTSTRAP_SCRIPT##*/}"
aws s3api put-object-acl --region ${s3_bucket_location} --bucket ${AWS_S3_BUCKET} --key "${bootstrap_script_path}" --grant-read 'uri="http://acs.amazonaws.com/groups/global/AllUsers"'
BOOTSTRAP_SCRIPT_URL="${s3_url_base}/${AWS_S3_BUCKET}/${bootstrap_script_path}"
echo "Uploaded server tars:"
echo " SERVER_BINARY_TAR_URL: ${SERVER_BINARY_TAR_URL}"
echo " SALT_TAR_URL: ${SALT_TAR_URL}"
echo " BOOTSTRAP_SCRIPT_URL: ${BOOTSTRAP_SCRIPT_URL}"
}
# Adds a tag to an AWS resource
# usage: add-tag <resource-id> <tag-name> <tag-value>
function add-tag {
echo "Adding tag to ${1}: ${2}=${3}"
# We need to retry in case the resource isn't yet fully created
n=0
until [ $n -ge 25 ]; do
$AWS_CMD create-tags --resources ${1} --tags Key=${2},Value=${3} > $LOG && return
n=$[$n+1]
sleep 3
done
echo "Unable to add tag to AWS resource"
exit 1
}
# Creates the IAM profile, based on configuration files in templates/iam
# usage: create-iam-profile kubernetes-master-us-west-1a-chom kubernetes-master
function create-iam-profile {
local key=$1
local role=$2
local conf_dir=file://${KUBE_ROOT}/cluster/aws/templates/iam
echo "Creating IAM role: ${key}"
aws iam create-role --role-name ${key} --assume-role-policy-document ${conf_dir}/${role}-role.json > $LOG
echo "Creating IAM role-policy: ${key}"
aws iam put-role-policy --role-name ${key} --policy-name ${key} --policy-document ${conf_dir}/${role}-policy.json > $LOG
echo "Creating IAM instance-policy: ${key}"
aws iam create-instance-profile --instance-profile-name ${key} > $LOG
echo "Adding IAM role to instance-policy: ${key}"
aws iam add-role-to-instance-profile --instance-profile-name ${key} --role-name ${key} > $LOG
}
# Creates the IAM roles (if they do not already exist)
function ensure-iam-profiles {
echo "Creating master IAM profile: ${IAM_PROFILE_MASTER}"
create-iam-profile ${IAM_PROFILE_MASTER} kubernetes-master
echo "Creating minion IAM profile: ${IAM_PROFILE_NODE}"
create-iam-profile ${IAM_PROFILE_NODE} kubernetes-minion
}
# Wait for instance to be in specified state
function wait-for-instance-state {
instance_id=$1
state=$2
while true; do
instance_state=$($AWS_CMD describe-instances --instance-ids ${instance_id} --query Reservations[].Instances[].State.Name)
if [[ "$instance_state" == "${state}" ]]; then
break
else
echo "Waiting for instance ${instance_id} to be ${state} (currently ${instance_state})"
echo "Sleeping for 3 seconds..."
sleep 3
fi
done
}
# Allocates new Elastic IP from Amazon
# Output: allocated IP address
function allocate-elastic-ip {
$AWS_CMD allocate-address --domain vpc --query PublicIp
}
# Attaches an elastic IP to the specified instance
function attach-ip-to-instance {
local ip_address=$1
local instance_id=$2
local elastic_ip_allocation_id=$($AWS_CMD describe-addresses --public-ips $ip_address --query Addresses[].AllocationId)
echo "Attaching IP ${ip_address} to instance ${instance_id}"
$AWS_CMD associate-address --instance-id ${instance_id} --allocation-id ${elastic_ip_allocation_id} > $LOG
}
# Releases an elastic IP
function release-elastic-ip {
local ip_address=$1
echo "Releasing Elastic IP: ${ip_address}"
elastic_ip_allocation_id=$($AWS_CMD describe-addresses --public-ips $ip_address --query Addresses[].AllocationId 2> $LOG) || true
if [[ -z "${elastic_ip_allocation_id}" ]]; then
echo "Elastic IP already released"
else
$AWS_CMD release-address --allocation-id ${elastic_ip_allocation_id} > $LOG
fi
}
# Deletes a security group
# usage: delete_security_group <sgid>
function delete_security_group {
local -r sg_id=${1}
echo "Deleting security group: ${sg_id}"
# We retry in case there's a dependent resource - typically an ELB
local n=0
until [ $n -ge 20 ]; do
$AWS_CMD delete-security-group --group-id ${sg_id} > $LOG && return
n=$[$n+1]
sleep 3
done
echo "Unable to delete security group: ${sg_id}"
exit 1
}
# Deletes master and minion IAM roles and instance profiles
# usage: delete-iam-instance-profiles
function delete-iam-profiles {
for iam_profile_name in ${IAM_PROFILE_MASTER} ${IAM_PROFILE_NODE};do
echo "Removing role from instance profile: ${iam_profile_name}"
conceal-no-such-entity-response aws iam remove-role-from-instance-profile --instance-profile-name "${iam_profile_name}" --role-name "${iam_profile_name}"
echo "Deleting IAM Instance-Profile: ${iam_profile_name}"
conceal-no-such-entity-response aws iam delete-instance-profile --instance-profile-name "${iam_profile_name}"
echo "Delete IAM role policy: ${iam_profile_name}"
conceal-no-such-entity-response aws iam delete-role-policy --role-name "${iam_profile_name}" --policy-name "${iam_profile_name}"
echo "Deleting IAM Role: ${iam_profile_name}"
conceal-no-such-entity-response aws iam delete-role --role-name "${iam_profile_name}"
done
}
# Detects NoSuchEntity response from AWS cli stderr output and conceals error
# Otherwise the error is treated as fatal
# usage: conceal-no-such-entity-response ...args
function conceal-no-such-entity-response {
# in plain english: redirect stderr to stdout, and stdout to the log file
local -r errMsg=$($@ 2>&1 > $LOG)
if [[ "$errMsg" == "" ]];then
return
fi
echo $errMsg
if [[ "$errMsg" =~ " (NoSuchEntity) " ]];then
echo " -> no such entity response detected. will assume operation is not necessary due to prior incomplete teardown"
return
fi
echo "Error message is fatal. Will exit"
exit 1
}
function ssh-key-setup {
if [[ ! -f "$AWS_SSH_KEY" ]]; then
ssh-keygen -f "$AWS_SSH_KEY" -N ''
fi
# Note that we use get-ssh-fingerprint, so this works on OSX Mavericks
# get-aws-fingerprint gives the same fingerprint that AWS computes,
# but OSX Mavericks ssh-keygen can't compute it
AWS_SSH_KEY_FINGERPRINT=$(get-ssh-fingerprint ${AWS_SSH_KEY}.pub)
echo "Using SSH key with (AWS) fingerprint: ${AWS_SSH_KEY_FINGERPRINT}"
AWS_SSH_KEY_NAME="kubernetes-${AWS_SSH_KEY_FINGERPRINT//:/}"
import-public-key ${AWS_SSH_KEY_NAME} ${AWS_SSH_KEY}.pub
}
function vpc-setup {
if [[ -z "${VPC_ID:-}" ]]; then
VPC_ID=$(get_vpc_id)
fi
if [[ -z "$VPC_ID" ]]; then
echo "Creating vpc."
VPC_ID=$($AWS_CMD create-vpc --cidr-block ${VPC_CIDR} --query Vpc.VpcId)
$AWS_CMD modify-vpc-attribute --vpc-id $VPC_ID --enable-dns-support '{"Value": true}' > $LOG
$AWS_CMD modify-vpc-attribute --vpc-id $VPC_ID --enable-dns-hostnames '{"Value": true}' > $LOG
add-tag $VPC_ID Name ${VPC_NAME}
add-tag $VPC_ID KubernetesCluster ${CLUSTER_ID}
fi
echo "Using VPC $VPC_ID"
}
function subnet-setup {
if [[ -z "${SUBNET_ID:-}" ]]; then
SUBNET_ID=$(get_subnet_id $VPC_ID $ZONE)
fi
if [[ -z "$SUBNET_ID" ]]; then
echo "Creating subnet."
SUBNET_ID=$($AWS_CMD create-subnet --cidr-block ${SUBNET_CIDR} --vpc-id $VPC_ID --availability-zone ${ZONE} --query Subnet.SubnetId)
add-tag $SUBNET_ID KubernetesCluster ${CLUSTER_ID}
else
EXISTING_CIDR=$($AWS_CMD describe-subnets --subnet-ids ${SUBNET_ID} --query Subnets[].CidrBlock)
echo "Using existing subnet with CIDR $EXISTING_CIDR"
if [ ! $SUBNET_CIDR = $EXISTING_CIDR ]; then
MASTER_INTERNAL_IP="${EXISTING_CIDR%.*}${MASTER_IP_SUFFIX}"
echo "Assuming MASTER_INTERNAL_IP=${MASTER_INTERNAL_IP}"
fi
fi
echo "Using subnet $SUBNET_ID"
}
function kube-up {
echo "Starting cluster using os distro: ${OS_DISTRIBUTION}" >&2
get-tokens
detect-image
detect-minion-image
detect-root-device
find-release-tars
ensure-temp-dir
create-bootstrap-script
upload-server-tars
ensure-iam-profiles
load-or-gen-kube-basicauth
load-or-gen-kube-bearertoken
ssh-key-setup
vpc-setup
create-dhcp-option-set
subnet-setup
IGW_ID=$(get_igw_id $VPC_ID)
if [[ -z "$IGW_ID" ]]; then
echo "Creating Internet Gateway."
IGW_ID=$($AWS_CMD create-internet-gateway --query InternetGateway.InternetGatewayId)
$AWS_CMD attach-internet-gateway --internet-gateway-id $IGW_ID --vpc-id $VPC_ID > $LOG
fi
echo "Using Internet Gateway $IGW_ID"
echo "Associating route table."
ROUTE_TABLE_ID=$($AWS_CMD describe-route-tables \
--filters Name=vpc-id,Values=${VPC_ID} \
Name=tag:KubernetesCluster,Values=${CLUSTER_ID} \
--query RouteTables[].RouteTableId)
if [[ -z "${ROUTE_TABLE_ID}" ]]; then
echo "Creating route table"
ROUTE_TABLE_ID=$($AWS_CMD create-route-table \
--vpc-id=${VPC_ID} \
--query RouteTable.RouteTableId)
add-tag ${ROUTE_TABLE_ID} KubernetesCluster ${CLUSTER_ID}
fi
echo "Associating route table ${ROUTE_TABLE_ID} to subnet ${SUBNET_ID}"
$AWS_CMD associate-route-table --route-table-id $ROUTE_TABLE_ID --subnet-id $SUBNET_ID > $LOG || true
echo "Adding route to route table ${ROUTE_TABLE_ID}"
$AWS_CMD create-route --route-table-id $ROUTE_TABLE_ID --destination-cidr-block 0.0.0.0/0 --gateway-id $IGW_ID > $LOG || true
echo "Using Route Table $ROUTE_TABLE_ID"
# Create security groups
MASTER_SG_ID=$(get_security_group_id "${MASTER_SG_NAME}")
if [[ -z "${MASTER_SG_ID}" ]]; then
echo "Creating master security group."
create-security-group "${MASTER_SG_NAME}" "Kubernetes security group applied to master nodes"
fi
NODE_SG_ID=$(get_security_group_id "${NODE_SG_NAME}")
if [[ -z "${NODE_SG_ID}" ]]; then
echo "Creating minion security group."
create-security-group "${NODE_SG_NAME}" "Kubernetes security group applied to minion nodes"
fi
detect-security-groups
# Masters can talk to master
authorize-security-group-ingress "${MASTER_SG_ID}" "--source-group ${MASTER_SG_ID} --protocol all"
# Minions can talk to minions
authorize-security-group-ingress "${NODE_SG_ID}" "--source-group ${NODE_SG_ID} --protocol all"
# Masters and minions can talk to each other
authorize-security-group-ingress "${MASTER_SG_ID}" "--source-group ${NODE_SG_ID} --protocol all"
authorize-security-group-ingress "${NODE_SG_ID}" "--source-group ${MASTER_SG_ID} --protocol all"
# SSH is open to the world
authorize-security-group-ingress "${MASTER_SG_ID}" "--protocol tcp --port 22 --cidr ${SSH_CIDR}"
authorize-security-group-ingress "${NODE_SG_ID}" "--protocol tcp --port 22 --cidr ${SSH_CIDR}"
# HTTPS to the master is allowed (for API access)
authorize-security-group-ingress "${MASTER_SG_ID}" "--protocol tcp --port 443 --cidr ${HTTP_API_CIDR}"
# KUBE_USE_EXISTING_MASTER is used to add minions to an existing master
if [[ "${KUBE_USE_EXISTING_MASTER:-}" == "true" ]]; then
detect-master
parse-master-env
# Start minions
start-minions
wait-minions
else
# Create the master
start-master
# Build ~/.kube/config
build-config
# Start minions
start-minions
wait-minions