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k3s/cluster/aws/util.sh

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#!/bin/bash
# Copyright 2014 Google Inc. 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.
source $(dirname ${BASH_SOURCE})/${KUBE_CONFIG_FILE-"config-default.sh"}
AWS_CMD="aws --output json ec2"
function json_val {
python -c 'import json,sys;obj=json.load(sys.stdin);print obj'$1''
}
# TODO (ayurchuk) Refactor the get_* functions to use filters
# TODO (bburns) Parameterize this for multiple cluster per project
function get_instance_ids {
python -c 'import json,sys; lst = [str(instance["InstanceId"]) for reservation in json.load(sys.stdin)["Reservations"] for instance in reservation["Instances"] for tag in instance["Tags"] if tag["Value"].startswith("kubernetes-minion") or tag["Value"].startswith("kubernetes-master")]; print " ".join(lst)'
}
function get_vpc_id {
python -c 'import json,sys; lst = [str(vpc["VpcId"]) for vpc in json.load(sys.stdin)["Vpcs"] for tag in vpc["Tags"] if tag["Value"] == "kubernetes-vpc"]; print "".join(lst)'
}
function get_subnet_id {
python -c "import json,sys; lst = [str(subnet['SubnetId']) for subnet in json.load(sys.stdin)['Subnets'] if subnet['VpcId'] == '$1']; print ''.join(lst)"
}
function get_igw_id {
python -c "import json,sys; lst = [str(igw['InternetGatewayId']) for igw in json.load(sys.stdin)['InternetGateways'] for attachment in igw['Attachments'] if attachment['VpcId'] == '$1']; print ''.join(lst)"
}
function get_route_table_id {
python -c "import json,sys; lst = [str(route_table['RouteTableId']) for route_table in json.load(sys.stdin)['RouteTables'] if route_table['VpcId'] == '$1']; print ''.join(lst)"
}
function get_sec_group_id {
python -c 'import json,sys; lst = [str(group["GroupId"]) for group in json.load(sys.stdin)["SecurityGroups"] if group["GroupName"] == "kubernetes-sec-group"]; print "".join(lst)'
}
function expect_instance_states {
python -c "import json,sys; lst = [str(instance['InstanceId']) for reservation in json.load(sys.stdin)['Reservations'] for instance in reservation['Instances'] if instance['State']['Name'] != '$1']; print ' '.join(lst)"
}
function get_instance_public_ip {
python -c "import json,sys; lst = [str(instance['NetworkInterfaces'][0]['Association']['PublicIp']) for reservation in json.load(sys.stdin)['Reservations'] for instance in reservation['Instances'] for tag in instance['Tags'] if tag['Value'] == '$1' and instance['State']['Name'] == 'running']; print ' '.join(lst)"
}
function detect-master () {
KUBE_MASTER=${MASTER_NAME}
if [[ -z "${KUBE_MASTER_IP-}" ]]; then
KUBE_MASTER_IP=$($AWS_CMD describe-instances | get_instance_public_ip $MASTER_NAME)
fi
if [[ -z "${KUBE_MASTER_IP-}" ]]; then
echo "Could not detect Kubernetes master node. Make sure you've launched a cluster with 'kube-up.sh'"
exit 1
fi
echo "Using master: $KUBE_MASTER (external IP: $KUBE_MASTER_IP)"
}
function detect-minions () {
KUBE_MINION_IP_ADDRESSES=()
for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
local minion_ip=$($AWS_CMD describe-instances --filters Name=tag-value,Values=${MINION_NAMES[$i]} Name=instance-state-name,Values=running | get_instance_public_ip ${MINION_NAMES[$i]})
echo "Found ${MINION_NAMES[$i]} at ${minion_ip}"
KUBE_MINION_IP_ADDRESSES+=("${minion_ip}")
done
if [ -z "$KUBE_MINION_IP_ADDRESSES" ]; then
echo "Could not detect Kubernetes minion nodes. Make sure you've launched a cluster with 'kube-up.sh'"
exit 1
fi
}
# Verify prereqs
function verify-prereqs {
if [ "$(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
}
function setup-monitoring {
if [ ${MONITORING-} ]; then
# TODO: Implement this.
echo "Monitoring not currently supported on AWS"
fi
}
function teardown-monitoring {
if [ ${MONITORING-} ]; then
# TODO: Implement this.
echo "Monitoring not currently supported on AWS"
fi
}
# Verify and find the various tar files that we are going to use on the server.
#
# Vars set:
# SERVER_BINARY_TAR
# SALT_TAR
function find-release-tars {
SERVER_BINARY_TAR="${KUBE_ROOT}/server/kubernetes-server-linux-amd64.tar.gz"
if [[ ! -f "$SERVER_BINARY_TAR" ]]; then
SERVER_BINARY_TAR="${KUBE_ROOT}/_output/release-tars/kubernetes-server-linux-amd64.tar.gz"
fi
if [[ ! -f "$SERVER_BINARY_TAR" ]]; then
echo "!!! Cannot find kubernetes-server-linux-amd64.tar.gz"
exit 1
fi
SALT_TAR="${KUBE_ROOT}/server/kubernetes-salt.tar.gz"
if [[ ! -f "$SALT_TAR" ]]; then
SALT_TAR="${KUBE_ROOT}/_output/release-tars/kubernetes-salt.tar.gz"
fi
if [[ ! -f "$SALT_TAR" ]]; then
echo "!!! Cannot find kubernetes-salt.tar.gz"
exit 1
fi
}
# Take the local tar files and upload them to S3. They will then be
# downloaded by the master as part of the start up script for the master.
#
# Assumed vars:
# SERVER_BINARY_TAR
# SALT_TAR
# Vars set:
# SERVER_BINARY_TAR_URL
# SALT_TAR_URL
function upload-server-tars() {
SERVER_BINARY_TAR_URL=
SALT_TAR_URL=
local project_hash=
local key=$(aws configure get aws_access_key_id)
if which md5 > /dev/null 2>&1; then
project_hash=$(md5 -q -s "${USER} ${key}")
else
project_hash=$(echo -n "${USER} ${key}" | md5sum | awk '{ print $1 }')
fi
local -r staging_bucket="kubernetes-staging-${project_hash}"
echo "Uploading to Amazon S3"
if ! aws s3 ls "s3://${staging_bucket}" > /dev/null 2>&1 ; then
echo "Creating ${staging_bucket}"
aws s3 mb "s3://${staging_bucket}"
fi
aws s3api put-bucket-acl --bucket $staging_bucket --acl public-read
local -r staging_path="${staging_bucket}/devel"
echo "+++ Staging server tars to S3 Storage: ${staging_path}"
SERVER_BINARY_TAR_URL="${staging_path}/${SERVER_BINARY_TAR##*/}"
aws s3 cp "${SERVER_BINARY_TAR}" "s3://${SERVER_BINARY_TAR_URL}"
aws s3api put-object-acl --bucket ${staging_bucket} --key "devel/${SERVER_BINARY_TAR##*/}" --grant-read 'uri="http://acs.amazonaws.com/groups/global/AllUsers"'
SALT_TAR_URL="${staging_path}/${SALT_TAR##*/}"
aws s3 cp "${SALT_TAR}" "s3://${SALT_TAR_URL}"
aws s3api put-object-acl --bucket ${staging_bucket} --key "devel/${SALT_TAR##*/}" --grant-read 'uri="http://acs.amazonaws.com/groups/global/AllUsers"'
}
# Ensure that we have a password created for validating to the master. Will
# read from $HOME/.kubernetres_auth if available.
#
# Vars set:
# KUBE_USER
# KUBE_PASSWORD
function get-password {
local file="$HOME/.kubernetes_auth"
if [[ -r "$file" ]]; then
KUBE_USER=$(cat "$file" | python -c 'import json,sys;print json.load(sys.stdin)["User"]')
KUBE_PASSWORD=$(cat "$file" | python -c 'import json,sys;print json.load(sys.stdin)["Password"]')
return
fi
KUBE_USER=admin
KUBE_PASSWORD=$(python -c 'import string,random; print "".join(random.SystemRandom().choice(string.ascii_letters + string.digits) for _ in range(16))')
# Remove this code, since in all use cases I can see, we are overwriting this
# at cluster creation time.
cat << EOF > "$file"
{
"User": "$KUBE_USER",
"Password": "$KUBE_PASSWORD"
}
EOF
chmod 0600 "$file"
}
function kube-up {
find-release-tars
upload-server-tars
ensure-temp-dir
get-password
python "${KUBE_ROOT}/third_party/htpasswd/htpasswd.py" \
-b -c "${KUBE_TEMP}/htpasswd" "$KUBE_USER" "$KUBE_PASSWORD"
local htpasswd
htpasswd=$(cat "${KUBE_TEMP}/htpasswd")
if [ ! -f $AWS_SSH_KEY ]; then
ssh-keygen -f $AWS_SSH_KEY -N ''
fi
$AWS_CMD import-key-pair --key-name kubernetes --public-key-material file://$AWS_SSH_KEY.pub > /dev/null 2>&1 || true
VPC_ID=$($AWS_CMD create-vpc --cidr-block 172.20.0.0/16 | json_val '["Vpc"]["VpcId"]')
$AWS_CMD modify-vpc-attribute --vpc-id $VPC_ID --enable-dns-support '{"Value": true}' > /dev/null
$AWS_CMD modify-vpc-attribute --vpc-id $VPC_ID --enable-dns-hostnames '{"Value": true}' > /dev/null
$AWS_CMD create-tags --resources $VPC_ID --tags Key=Name,Value=kubernetes-vpc > /dev/null
SUBNET_ID=$($AWS_CMD create-subnet --cidr-block 172.20.0.0/24 --vpc-id $VPC_ID | json_val '["Subnet"]["SubnetId"]')
IGW_ID=$($AWS_CMD create-internet-gateway | json_val '["InternetGateway"]["InternetGatewayId"]')
$AWS_CMD attach-internet-gateway --internet-gateway-id $IGW_ID --vpc-id $VPC_ID > /dev/null
ROUTE_TABLE_ID=$($AWS_CMD describe-route-tables --filters Name=vpc-id,Values=$VPC_ID | json_val '["RouteTables"][0]["RouteTableId"]')
$AWS_CMD associate-route-table --route-table-id $ROUTE_TABLE_ID --subnet-id $SUBNET_ID > /dev/null
$AWS_CMD describe-route-tables --filters Name=vpc-id,Values=$VPC_ID > /dev/null
$AWS_CMD create-route --route-table-id $ROUTE_TABLE_ID --destination-cidr-block 0.0.0.0/0 --gateway-id $IGW_ID > /dev/null
SEC_GROUP_ID=$($AWS_CMD create-security-group --group-name kubernetes-sec-group --description kubernetes-sec-group --vpc-id $VPC_ID | json_val '["GroupId"]')
$AWS_CMD authorize-security-group-ingress --group-id $SEC_GROUP_ID --protocol -1 --port all --cidr 0.0.0.0/0 > /dev/null
(
# We pipe this to the ami as a startup script in the user-data field. Requires a compatible ami
echo "#! /bin/bash"
echo "mkdir -p /var/cache/kubernetes-install"
echo "cd /var/cache/kubernetes-install"
echo "readonly MASTER_NAME='${MASTER_NAME}'"
echo "readonly NODE_INSTANCE_PREFIX='${INSTANCE_PREFIX}-minion'"
echo "readonly SERVER_BINARY_TAR_URL='https://s3-${ZONE}.amazonaws.com/${SERVER_BINARY_TAR_URL}'"
echo "readonly SALT_TAR_URL='https://s3-${ZONE}.amazonaws.com/${SALT_TAR_URL}'"
echo "readonly AWS_ZONE='${ZONE}'"
echo "readonly MASTER_HTPASSWD='${htpasswd}'"
echo "readonly PORTAL_NET='${PORTAL_NET}'"
echo "readonly FLUENTD_ELASTICSEARCH='${FLUENTD_ELASTICSEARCH:-false}'"
echo "readonly FLUENTD_GCP='false'"
grep -v "^#" "${KUBE_ROOT}/cluster/aws/templates/create-dynamic-salt-files.sh"
grep -v "^#" "${KUBE_ROOT}/cluster/aws/templates/download-release.sh"
grep -v "^#" "${KUBE_ROOT}/cluster/aws/templates/salt-master.sh"
) > "${KUBE_TEMP}/master-start.sh"
master_id=$($AWS_CMD run-instances \
--image-id $IMAGE \
--instance-type $MASTER_SIZE \
--subnet-id $SUBNET_ID \
--private-ip-address 172.20.0.9 \
--key-name kubernetes \
--security-group-ids $SEC_GROUP_ID \
--associate-public-ip-address \
--user-data file://${KUBE_TEMP}/master-start.sh | json_val '["Instances"][0]["InstanceId"]')
sleep 3
$AWS_CMD create-tags --resources $master_id --tags Key=Name,Value=$MASTER_NAME > /dev/null
sleep 3
$AWS_CMD create-tags --resources $master_id --tags Key=Role,Value=$MASTER_TAG > /dev/null
for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
(
# We pipe this to the ami as a startup script in the user-data field. Requires a compatible ami
echo "#! /bin/bash"
echo "MASTER_NAME='${MASTER_NAME}'"
echo "MINION_IP_RANGE='${MINION_IP_RANGES[$i]}'"
grep -v "^#" "${KUBE_ROOT}/cluster/aws/templates/salt-minion.sh"
) > "${KUBE_TEMP}/minion-start-${i}.sh"
minion_id=$($AWS_CMD run-instances \
--image-id $IMAGE \
--instance-type $MINION_SIZE \
--subnet-id $SUBNET_ID \
--private-ip-address 172.20.0.1${i} \
--key-name kubernetes \
--security-group-ids $SEC_GROUP_ID \
--associate-public-ip-address \
--user-data file://${KUBE_TEMP}/minion-start-${i}.sh | json_val '["Instances"][0]["InstanceId"]')
sleep 3
n=0
until [ $n -ge 5 ]; do
$AWS_CMD create-tags --resources $minion_id --tags Key=Name,Value=${MINION_NAMES[$i]} > /dev/null && break
n=$[$n+1]
sleep 15
done
sleep 3
n=0
until [ $n -ge 5 ]; do
$AWS_CMD create-tags --resources $minion_id --tags Key=Role,Value=$MINION_TAG > /dev/null && break
n=$[$n+1]
sleep 15
done
sleep 3
$AWS_CMD modify-instance-attribute --instance-id $minion_id --source-dest-check '{"Value": false}' > /dev/null
# We are not able to add a route to the instance until that instance is in "running" state.
# This is quite an ugly solution to this problem. In Bash 4 we could use assoc. arrays to do this for
# all instances at once but we can't be sure we are running Bash 4.
while true; do
instance_state=$($AWS_CMD describe-instances --instance-ids $minion_id | expect_instance_states running)
if [[ "$instance_state" == "" ]]; then
echo "Minion ${MINION_NAMES[$i]} running"
sleep 10
$AWS_CMD create-route --route-table-id $ROUTE_TABLE_ID --destination-cidr-block ${MINION_IP_RANGES[$i]} --instance-id $minion_id > /dev/null
break
else
echo "Waiting for minion ${MINION_NAMES[$i]} to spawn"
echo "Sleeping for 3 seconds..."
sleep 3
fi
done
done
FAIL=0
for job in `jobs -p`; do
wait $job || let "FAIL+=1"
done
if (( $FAIL != 0 )); then
echo "${FAIL} commands failed. Exiting."
exit 2
fi
detect-master > /dev/null
detect-minions > /dev/null
# Wait 3 minutes for cluster to come up. We hit it with a "highstate" after that to
# make sure that everything is well configured.
echo "Waiting for cluster to settle"
local i
for (( i=0; i < 6*3; i++)); do
printf "."
sleep 10
done
echo "Re-running salt highstate"
ssh -oStrictHostKeyChecking=no -i ~/.ssh/kube_aws_rsa ubuntu@${KUBE_MASTER_IP} sudo salt '*' state.highstate > /dev/null
echo "Waiting for cluster initialization."
echo
echo " This will continually check to see if the API for kubernetes is reachable."
echo " This might loop forever if there was some uncaught error during start"
echo " up."
echo
until $(curl --insecure --user ${KUBE_USER}:${KUBE_PASSWORD} --max-time 5 \
--fail --output /dev/null --silent https://${KUBE_MASTER_IP}/api/v1beta1/pods); do
printf "."
sleep 2
done
echo "Kubernetes cluster created."
echo "Sanity checking cluster..."
sleep 5
# Don't bail on errors, we want to be able to print some info.
set +e
# Basic sanity checking
for i in ${KUBE_MINION_IP_ADDRESSES[@]}; do
# Make sure docker is installed
ssh -oStrictHostKeyChecking=no ubuntu@$i -i ~/.ssh/kube_aws_rsa which docker > /dev/null 2>&1
if [ "$?" != "0" ]; then
echo "Docker failed to install on $i. Your cluster is unlikely to work correctly."
echo "Please run ./cluster/aws/kube-down.sh and re-create the cluster. (sorry!)"
exit 1
fi
done
echo
echo "Kubernetes cluster is running. Access the master at:"
echo
echo " https://${KUBE_USER}:${KUBE_PASSWORD}@${KUBE_MASTER_IP}"
echo
local kube_cert=".kubecfg.crt"
local kube_key=".kubecfg.key"
local ca_cert=".kubernetes.ca.crt"
# TODO: generate ADMIN (and KUBELET) tokens and put those in the master's
# config file. Distribute the same way the htpasswd is done.
(
umask 077
ssh -oStrictHostKeyChecking=no -i ~/.ssh/kube_aws_rsa ubuntu@${KUBE_MASTER_IP} sudo cat /usr/share/nginx/kubecfg.crt >"${HOME}/${kube_cert}" 2>/dev/null
ssh -oStrictHostKeyChecking=no -i ~/.ssh/kube_aws_rsa ubuntu@${KUBE_MASTER_IP} sudo cat /usr/share/nginx/kubecfg.key >"${HOME}/${kube_key}" 2>/dev/null
ssh -oStrictHostKeyChecking=no -i ~/.ssh/kube_aws_rsa ubuntu@${KUBE_MASTER_IP} sudo cat /usr/share/nginx/ca.crt >"${HOME}/${ca_cert}" 2>/dev/null
cat << EOF > ~/.kubernetes_auth
{
"User": "$KUBE_USER",
"Password": "$KUBE_PASSWORD",
"CAFile": "$HOME/$ca_cert",
"CertFile": "$HOME/$kube_cert",
"KeyFile": "$HOME/$kube_key"
}
EOF
chmod 0600 ~/.kubernetes_auth "${HOME}/${kube_cert}" \
"${HOME}/${kube_key}" "${HOME}/${ca_cert}"
)
}
function kube-down {
AWS_CMD="aws --output json ec2"
instance_ids=$($AWS_CMD describe-instances | get_instance_ids)
$AWS_CMD terminate-instances --instance-ids $instance_ids > /dev/null
echo "Waiting for instances deleted"
while true; do
instance_states=$($AWS_CMD describe-instances --instance-ids $instance_ids | expect_instance_states terminated)
if [[ "$instance_states" == "" ]]; then
echo "All instances terminated"
break
else
echo "Instances not yet terminated: $instance_states"
echo "Sleeping for 3 seconds..."
sleep 3
fi
done
echo "Deleting VPC"
vpc_id=$($AWS_CMD describe-vpcs | get_vpc_id)
subnet_id=$($AWS_CMD describe-subnets | get_subnet_id $vpc_id)
igw_id=$($AWS_CMD describe-internet-gateways | get_igw_id $vpc_id)
route_table_id=$($AWS_CMD describe-route-tables | get_route_table_id $vpc_id)
sec_group_id=$($AWS_CMD describe-security-groups | get_sec_group_id)
$AWS_CMD delete-subnet --subnet-id $subnet_id > /dev/null
$AWS_CMD detach-internet-gateway --internet-gateway-id $igw_id --vpc-id $vpc_id > /dev/null
$AWS_CMD delete-internet-gateway --internet-gateway-id $igw_id > /dev/null
$AWS_CMD delete-security-group --group-id $sec_group_id > /dev/null
$AWS_CMD delete-route --route-table-id $route_table_id --destination-cidr-block 0.0.0.0/0 > /dev/null
$AWS_CMD delete-vpc --vpc-id $vpc_id > /dev/null
}
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