AWS ALB (Classic) - REGISTER OR DEREGISTER INSTANCES WITH/FROM ELB CLASSIC

aws_classic_elb_reg.sh

#!/usr/bin/env bash

# REGISTER OR DEREGISTER INSTANCES WITH/FROM ELB CLASSIC

## SANDBOX/PLAY ACCOUNT
ELBNAME=23feb22
INSTANCES=(
  i-0673baad826269229  # Name: dummy1
  i-0a72c8136b4ee5042  # Name: dummy2
)

deregister(){
  echo "Instances to deregister: ${INSTANCES[*]}"
  aws elb deregister-instances-from-load-balancer \
    --load-balancer-name ${ELBNAME} \
    --instances ${INSTANCES[*]} \
    --out yaml
}

register(){
  echo "Instances to register: ${INSTANCES[*]}"
  aws elb register-instances-with-load-balancer \
    --load-balancer-name ${ELBNAME} \
    --instances ${INSTANCES[*]} \
    --out yaml
}

DO=$1
if [[ "$DO" == "register" ]] || [[ "$DO" == "deregister" ]]; then
  echo "Load balancer: ${ELBNAME}"
  echo "Action: ${DO}"
  ${DO}
else echo "No action $DO"
fi