Search AWS over load balancers and target groups to find Load balancers without Target groups and find TGs without Registered targets

LBs-TGs.sh

#!/bin/bash
AWS_REGION="xx-xxxx-1"
AWS_OUTPUT="json"
AWS_PROFILE="xxx"

# 01-  ELBs without Target Groups
load_balancers=$(aws elbv2 describe-load-balancers --query "LoadBalancers[*].LoadBalancerArn" --output text --profile $AWS_PROFILE)

for lb in $load_balancers; do
  #printf "$lb"'%b\n'
  target_groups=$(aws elbv2 describe-target-groups --load-balancer-arn "$lb" --query "TargetGroups[*].TargetGroupArn" --output text --profile $AWS_PROFILE)

  if [ -z "$target_groups" ]; then
    lb_name=$(aws elbv2 describe-load-balancers --load-balancer-arn "$lb" --query "LoadBalancers[*].LoadBalancerName" --output text --profile $AWS_PROFILE)
    echo "Load balancer $lb_name does not have any target groups."
  fi
done



# 02- Only Target Groups without Registered Targets (may or may not have an associated load balancer):
target_groups=$(aws elbv2 describe-target-groups --query "TargetGroups[*].TargetGroupArn" --output text --profile $AWS_PROFILE)

for target_group in $target_groups; do
  registered_targets=$(aws elbv2 describe-target-health --target-group-arn $target_group --query "TargetHealthDescriptions[*].Target.Id" --output text --profile $AWS_PROFILE)

  if [ -z "$registered_targets" ]; then
    echo "Target group without registered targets: $target_group"
  fi
done



# 03 - Load balancers that his target groups do not have registered targets
LB_LIST=$(aws elbv2 describe-load-balancers --region $AWS_REGION --output $AWS_OUTPUT --profile $AWS_PROFILE)

for LB in $(echo "${LB_LIST}" | jq -r '.LoadBalancers[].LoadBalancerArn')
do
  TG_LIST=$(aws elbv2 describe-target-groups --load-balancer-arn $LB --region $AWS_REGION --output $AWS_OUTPUT --profile $AWS_PROFILE)
  for TG in $(echo "${TG_LIST}" | jq -r '.TargetGroups[].TargetGroupArn')
  do
    TARGET_LIST=$(aws elbv2 describe-target-health --target-group-arn $TG --region $AWS_REGION --output $AWS_OUTPUT --profile $AWS_PROFILE)
    if [ "$(echo "${TARGET_LIST}" | jq -r '.TargetHealthDescriptions | length')" == "0" ]
    then
      echo "Load balancer with ARN $LB has a target group with ARN $TG that has no registered targets."
    fi
  done
done