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https://github.com/k3s-io/kubernetes.git
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AWS support draft
Fix calling function before declaration Set Name tags on instances Hide import-key-pair error Fix instances names resolution Implement kube-down for AWS provider Add cluster validation routines. Make changes according to #1255 Implement post-deployment cluster validation Set proper master name in userdata scripts Fix kube-down path in hint Add getting started for AWS
This commit is contained in:
Andriy Yurchuk
committed by
Brendan Burns
Brendan Burns
parent
4a21dbbb0a
commit
1ff79fdeb0
317
cluster/aws/util.sh
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317
cluster/aws/util.sh
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#!/bin/bash
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# Copyright 2014 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# A library of helper functions and constant for the local config.
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# Use the config file specified in $KUBE_CONFIG_FILE, or default to
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# config-default.sh.
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source $(dirname ${BASH_SOURCE})/${KUBE_CONFIG_FILE-"config-default.sh"}
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AWS_CMD="aws --output json ec2"
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# Find the release to use. If passed in, go with that and validate. If not use
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# the release/config.sh version assuming a dev workflow.
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function find-release() {
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if [ -n "$1" ]; then
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RELEASE_NORMALIZED=$1
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else
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local RELEASE_CONFIG_SCRIPT=$(dirname $0)/../../release/aws/config.sh
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if [ -f $(dirname $0)/../../release/aws/config.sh ]; then
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. $RELEASE_CONFIG_SCRIPT
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normalize_release
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fi
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fi
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# Do one final check that we have a good release
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if ! aws s3 ls $RELEASE_NORMALIZED/$RELEASE_TAR_FILE | grep $RELEASE_TAR_FILE > /dev/null; then
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echo "Could not find release tar. If developing, make sure you have run src/release/release.sh to create a release."
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exit 1
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fi
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echo "Release: ${RELEASE_NORMALIZED}"
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}
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function json_val {
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python -c 'import json,sys;obj=json.load(sys.stdin);print obj'$1''
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}
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# TODO (ayurchuk) Refactor the get_* functions to use filters
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function get_instance_ids {
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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)'
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}
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function get_vpc_id {
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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)'
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}
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function get_subnet_id {
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python -c "import json,sys; lst = [str(subnet['SubnetId']) for subnet in json.load(sys.stdin)['Subnets'] if subnet['VpcId'] == '$1']; print ''.join(lst)"
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}
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function get_igw_id {
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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)"
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}
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function get_route_table_id {
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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)"
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}
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function get_sec_group_id {
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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)'
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}
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function expect_instance_states {
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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)"
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}
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function get_instance_public_ip {
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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'] == '$1' and instance['State']['Name'] == 'running']; print ' '.join(lst)"
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}
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function detect-master () {
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KUBE_MASTER=${MASTER_NAME}
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if [ -z "$KUBE_MASTER_IP" ]; then
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KUBE_MASTER_IP=$($AWS_CMD describe-instances | get_instance_public_ip $MASTER_NAME)
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fi
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if [ -z "$KUBE_MASTER_IP" ]; then
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echo "Could not detect Kubernetes master node. Make sure you've launched a cluster with 'kube-up.sh'"
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exit 1
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fi
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echo "Using master: $KUBE_MASTER (external IP: $KUBE_MASTER_IP)"
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}
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function detect-minions () {
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KUBE_MINION_IP_ADDRESSES=()
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for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
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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]})
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echo "Found ${MINION_NAMES[$i]} at ${minion_ip}"
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KUBE_MINION_IP_ADDRESSES+=("${minion_ip}")
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done
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if [ -z "$KUBE_MINION_IP_ADDRESSES" ]; then
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echo "Could not detect Kubernetes minion nodes. Make sure you've launched a cluster with 'kube-up.sh'"
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exit 1
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fi
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}
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function get-password {
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file=${HOME}/.kubernetes_auth
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if [ -e ${file} ]; then
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user=$(cat $file | python -c 'import json,sys;print json.load(sys.stdin)["User"]')
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passwd=$(cat $file | python -c 'import json,sys;print json.load(sys.stdin)["Password"]')
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return
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fi
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user=admin
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passwd=$(python -c 'import string,random; print "".join(random.SystemRandom().choice(string.ascii_letters + string.digits) for _ in range(16))')
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# Store password for reuse.
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cat << EOF > ~/.kubernetes_auth
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{
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"User": "$user",
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"Password": "$passwd"
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}
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EOF
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chmod 0600 ~/.kubernetes_auth
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}
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# Verify prereqs
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function verify-prereqs {
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if [ "$(which aws)" == "" ]; then
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echo "Can't find aws in PATH, please fix and retry."
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exit 1
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fi
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}
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function kube-up {
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# Find the release to use. Generally it will be passed when doing a 'prod'
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# install and will default to the release/config.sh version when doing a
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# developer up.
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find-release $1
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# Build up start up script for master
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KUBE_TEMP=$(mktemp -d -t kubernetes.XXXXXX)
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trap "rm -rf ${KUBE_TEMP}" EXIT
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get-password
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echo "Using password: $user:$passwd"
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python $(dirname $0)/../../third_party/htpasswd/htpasswd.py -b -c ${KUBE_TEMP}/htpasswd $user $passwd
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HTPASSWD=$(cat ${KUBE_TEMP}/htpasswd)
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if [ ! -f $AWS_SSH_KEY ]; then
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ssh-keygen -f $AWS_SSH_KEY -N ''
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fi
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$AWS_CMD import-key-pair --key-name kubernetes --public-key-material file://$AWS_SSH_KEY.pub > /dev/null 2>&1 || true
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VPC_ID=$($AWS_CMD create-vpc --cidr-block 172.20.0.0/16 | json_val '["Vpc"]["VpcId"]')
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$AWS_CMD modify-vpc-attribute --vpc-id $VPC_ID --enable-dns-support '{"Value": true}' > /dev/null
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$AWS_CMD modify-vpc-attribute --vpc-id $VPC_ID --enable-dns-hostnames '{"Value": true}' > /dev/null
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$AWS_CMD create-tags --resources $VPC_ID --tags Key=Name,Value=kubernetes-vpc > /dev/null
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SUBNET_ID=$($AWS_CMD create-subnet --cidr-block 172.20.0.0/24 --vpc-id $VPC_ID | json_val '["Subnet"]["SubnetId"]')
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IGW_ID=$($AWS_CMD create-internet-gateway | json_val '["InternetGateway"]["InternetGatewayId"]')
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$AWS_CMD attach-internet-gateway --internet-gateway-id $IGW_ID --vpc-id $VPC_ID > /dev/null
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ROUTE_TABLE_ID=$($AWS_CMD describe-route-tables --filters Name=vpc-id,Values=$VPC_ID | json_val '["RouteTables"][0]["RouteTableId"]')
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$AWS_CMD associate-route-table --route-table-id $ROUTE_TABLE_ID --subnet-id $SUBNET_ID > /dev/null
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$AWS_CMD describe-route-tables --filters Name=vpc-id,Values=$VPC_ID > /dev/null
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$AWS_CMD create-route --route-table-id $ROUTE_TABLE_ID --destination-cidr-block 0.0.0.0/0 --gateway-id $IGW_ID > /dev/null
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SEC_GROUP_ID=$($AWS_CMD create-security-group --group-name kubernetes-sec-group --description kubernetes-sec-group --vpc-id $VPC_ID | json_val '["GroupId"]')
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$AWS_CMD authorize-security-group-ingress --group-id $SEC_GROUP_ID --protocol -1 --port all --cidr 0.0.0.0/0 > /dev/null
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(
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echo "#!/bin/bash"
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echo "MASTER_NAME=${MASTER_NAME}"
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echo "MASTER_RELEASE_TAR=${RELEASE_FULL_HTTP_PATH}/master-release.tgz"
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echo "MASTER_HTPASSWD='${HTPASSWD}'"
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grep -v "^#" $(dirname $0)/templates/download-release.sh
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grep -v "^#" $(dirname $0)/templates/salt-master.sh
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) > ${KUBE_TEMP}/master-start.sh
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master_id=$($AWS_CMD run-instances \
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--image-id $IMAGE \
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--instance-type $MASTER_SIZE \
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--subnet-id $SUBNET_ID \
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--private-ip-address 172.20.0.9 \
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--key-name kubernetes \
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--security-group-ids $SEC_GROUP_ID \
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--associate-public-ip-address \
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--user-data file://${KUBE_TEMP}/master-start.sh | json_val '["Instances"][0]["InstanceId"]')
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$AWS_CMD create-tags --resources $master_id --tags Key=Name,Value=$MASTER_NAME > /dev/null
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$AWS_CMD create-tags --resources $master_id --tags Key=Role,Value=$MASTER_TAG > /dev/null
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for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
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(
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echo "#! /bin/bash"
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echo "MASTER_NAME=${MASTER_NAME}"
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echo "MINION_IP_RANGE=${MINION_IP_RANGES[$i]}"
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grep -v "^#" $(dirname $0)/templates/salt-minion.sh
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) > ${KUBE_TEMP}/minion-start-${i}.sh
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minion_id=$($AWS_CMD run-instances \
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--image-id $IMAGE \
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--instance-type $MINION_SIZE \
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--subnet-id $SUBNET_ID \
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--private-ip-address 172.20.0.1${i} \
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--key-name kubernetes \
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--security-group-ids $SEC_GROUP_ID \
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--associate-public-ip-address \
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--user-data file://${KUBE_TEMP}/minion-start-${i}.sh | json_val '["Instances"][0]["InstanceId"]')
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$AWS_CMD create-tags --resources $minion_id --tags Key=Name,Value=${MINION_NAMES[$i]} > /dev/null
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$AWS_CMD create-tags --resources $minion_id --tags Key=Role,Value=$MINION_TAG > /dev/null
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$AWS_CMD modify-instance-attribute --instance-id $minion_id --source-dest-check '{"Value": false}' > /dev/null
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# We are not able to add a route to the instance until that instance is in "running" state.
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# This is quite an ugly solution to this problem. In Bash 4 we could use assoc. arrays to do this for
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# all instances at once but we can't be sure we are running Bash 4.
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while true; do
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instance_state=$($AWS_CMD describe-instances --instance-ids $minion_id | expect_instance_states running)
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if [[ "$instance_state" == "" ]]; then
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echo "Minion ${MINION_NAMES[$i]} running"
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$AWS_CMD create-route --route-table-id $ROUTE_TABLE_ID --destination-cidr-block "10.244.$i.0/24" --instance-id $minion_id > /dev/null
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break
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else
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echo "Waiting for minion ${MINION_NAMES[$i]} to spawn"
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echo "Sleeping for 3 seconds..."
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sleep 3
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fi
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done
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done
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FAIL=0
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for job in `jobs -p`
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do
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wait $job || let "FAIL+=1"
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done
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if (( $FAIL != 0 )); then
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echo "${FAIL} commands failed. Exiting."
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exit 2
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fi
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detect-master > /dev/null
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detect-minions > /dev/null
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echo "Waiting for cluster initialization."
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echo
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echo " This will continually check to see if the API for kubernetes is reachable."
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echo " This might loop forever if there was some uncaught error during start"
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echo " up."
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echo
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until $(curl --insecure --user ${user}:${passwd} --max-time 5 \
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--fail --output /dev/null --silent https://${KUBE_MASTER_IP}/api/v1beta1/pods); do
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printf "."
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sleep 2
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done
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echo "Kubernetes cluster created."
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echo "Sanity checking cluster..."
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sleep 5
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# Don't bail on errors, we want to be able to print some info.
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set +e
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# Basic sanity checking
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for i in ${KUBE_MINION_IP_ADDRESSES[@]}; do
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# Make sure docker is installed
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ssh -oStrictHostKeyChecking=no ubuntu@$i -i ~/.ssh/kube_aws_rsa which docker > /dev/null 2>&1
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if [ "$?" != "0" ]; then
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echo "Docker failed to install on $i. Your cluster is unlikely to work correctly."
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echo "Please run ./cluster/aws/kube-down.sh and re-create the cluster. (sorry!)"
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exit 1
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fi
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done
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echo
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echo "Kubernetes cluster is running. Access the master at:"
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echo
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echo " https://${user}:${passwd}@${KUBE_MASTER_IP}"
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echo
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echo "Security note: The server above uses a self signed certificate. This is"
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echo " subject to \"Man in the middle\" type attacks."
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}
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function kube-down {
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AWS_CMD="aws --output json ec2"
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instance_ids=$($AWS_CMD describe-instances | get_instance_ids)
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$AWS_CMD terminate-instances --instance-ids $instance_ids > /dev/null
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echo "Waiting for instances deleted"
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while true; do
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instance_states=$($AWS_CMD describe-instances --instance-ids $instance_ids | expect_instance_states terminated)
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if [[ "$instance_states" == "" ]]; then
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echo "All instances terminated"
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break
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else
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echo "Instances not yet terminated: $instance_states"
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echo "Sleeping for 3 seconds..."
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sleep 3
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fi
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done
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echo "Deleting VPC"
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vpc_id=$($AWS_CMD describe-vpcs | get_vpc_id)
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subnet_id=$($AWS_CMD describe-subnets | get_subnet_id $vpc_id)
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igw_id=$($AWS_CMD describe-internet-gateways | get_igw_id $vpc_id)
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route_table_id=$($AWS_CMD describe-route-tables | get_route_table_id $vpc_id)
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sec_group_id=$($AWS_CMD describe-security-groups | get_sec_group_id)
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$AWS_CMD delete-subnet --subnet-id $subnet_id > /dev/null
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$AWS_CMD detach-internet-gateway --internet-gateway-id $igw_id --vpc-id $vpc_id > /dev/null
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$AWS_CMD delete-internet-gateway --internet-gateway-id $igw_id > /dev/null
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$AWS_CMD delete-security-group --group-id $sec_group_id > /dev/null
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$AWS_CMD delete-route --route-table-id $route_table_id --destination-cidr-block 0.0.0.0/0 > /dev/null
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$AWS_CMD delete-vpc --vpc-id $vpc_id > /dev/null
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}
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