[AWS] インスタンスをスケールアップするときに ELB 配下だったら、一度外して再参加させるやつ
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#!/bin/sh | |
INSTANCE_ID="${1}" | |
INSTANCE_TYPE="${2}" | |
# 指定されたインスタンスタイプが現在のものと同じだったら何もしない | |
CURRENT_INSTANCE_TYPE=`aws ec2 describe-instances --instance-ids ${INSTANCE_ID} | jq -r '.Reservations[].Instances[].InstanceType'` | |
if [ "${CURRENT_INSTANCE_TYPE}" = "${INSTANCE_TYPE}" ]; then | |
echo "current instance type : ${CURRENT_INSTANCE_TYPE}" | |
exit 0 | |
fi | |
# ELB 配下かどうか確認 | |
ELB_NAME='' | |
ELBS=`aws elb describe-load-balancers | jq -r ".LoadBalancerDescriptions[].LoadBalancerName"` | |
for ELB in ${ELBS}; do | |
ELB_INSTANCE_IDS=`aws elb describe-instance-health --load-balancer-name ${ELB} | jq -r ".InstanceStates[].InstanceId"` | |
for ELB_INSTANCE_ID in ${ELB_INSTANCE_IDS}; do | |
if [ "${ELB_INSTANCE_ID}" = "${INSTANCE_ID}" ]; then | |
ELB_NAME="${ELB}" | |
break | |
fi | |
done | |
ELB_INSTANCE_IDS='' | |
if [ "${ELB_NAME}" != "" ]; then | |
break; | |
fi | |
done | |
# ELB 配下だったら取り外す | |
if [ "${ELB_NAME}" != "" ]; then | |
echo " Remove ELB: ${INSTANCE_ID} from ${ELB_NAME}" | |
aws elb deregister-instances-from-load-balancer --load-balancer-name=${ELB_NAME} --instances=${INSTANCE_ID} | |
fi | |
# インスタンス停止して、stopped になるまで待つ | |
while : | |
do | |
EC2_STATE=`aws ec2 describe-instances --instance-ids ${INSTANCE_ID} | jq -r '.Reservations[].Instances[].State | .Name'` | |
echo "${INSTANCE_ID} : ${EC2_STATE}" | |
if [ "${EC2_STATE}" = "running" ]; then | |
aws ec2 stop-instances --instance-ids ${INSTANCE_ID} | |
fi | |
if [ "${EC2_STATE}" = "stopped" ]; then | |
break | |
fi | |
sleep 10 | |
done | |
# インスタンスタイプを変更する | |
aws ec2 modify-instance-attribute --instance-id ${INSTANCE_ID} --instance-type ${INSTANCE_TYPE} | |
# インスタンス開始して、running になるまで待つ | |
aws ec2 start-instances --instance-ids ${INSTANCE_ID} | |
while : | |
do | |
EC2_STATE=`aws ec2 describe-instances --instance-ids ${INSTANCE_ID} | jq -r '.Reservations[].Instances[].State | .Name'` | |
echo "${INSTANCE_ID} : ${EC2_STATE}" | |
if [ "${EC2_STATE}" = "running" ]; then | |
break | |
fi | |
sleep 10 | |
done | |
# ELB に参加させる | |
if [ "${ELB_NAME}" != "" ]; then | |
echo " Add ELB: ${INSTANCE_ID} to ${ELB_NAME}" | |
aws elb register-instances-with-load-balancer --load-balancer-name=${ELB_NAME} --instances=${INSTANCE_ID} | |
fi |
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