sh ELB注册/注销ec2

Posted 2021-05-07

#!/bin/bash

command=$1
elb_name=$2

id=`curl http://169.254.169.254/latest/meta-data/instance-id 2>/dev/null`
if [ -z $id ]; then
  exit 1
fi

function list() {
  aws elb describe-load-balancers --load-balancer-name ${elb_name} | jq -r '.LoadBalancerDescriptions[].Instances[].InstanceId'
}

function register() {
  aws elb register-instances-with-load-balancer --load-balancer-name ${elb_name} --instance ${id} | jq -r '.Instances[].InstanceId'
}

function deregister() {
  aws elb deregister-instances-from-load-balancer --load-balancer-name ${elb_name} --instance ${id} | jq -r '.Instances[].InstanceId'
}

case $command in
  'list' ) list ;;
  'register' ) register ;;
  'deregister' ) deregister ;;
  * ) echo 'USAGE: myelb.sh list|register|deregister elb_name'
esac