1. List Load Balancers without Listener#

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IFS=$'\n'
PROFILE=default
REGION=us-east-1

for lb in $(aws --profile=$PROFILE --region=$REGION elbv2 describe-load-balancers | jq -r '.LoadBalancers[] | "\(.LoadBalancerName) \(.LoadBalancerArn)"'); do
    lb_name=$(echo $lb | awk '{print $1}')
    lb_arn=$(echo $lb | awk '{print $2}')
    lb_listeners_len=$(aws --profile=$PROFILE --region=$REGION elbv2 describe-listeners --load-balancer-arn $lb_arn | jq -r '.Listeners | length')
    if [ $lb_listeners_len -eq 0 ]; then
        echo "$lb_name"
    fi
done

2. List Target Groups without Targets or healthy targets#

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IFS=$'\n'
PROFILE=default
REGION=us-east-1
for tg in $(aws --profile=$PROFILE --region=$REGION elbv2 describe-target-groups | jq -r '.TargetGroups[] | "\(.TargetGroupName) \(.TargetGroupArn) \(.LoadBalancerArns)"'); do
    tg_name=$(echo $tg | awk '{print $1}')
    tg_arn=$(echo $tg | awk '{print $2}')
    tg_lb_arns=$(echo $tg | awk '{print $3}')

    if [ $(echo $tg_lb_arns | jq -r '. | length') -eq 0 ]; then
        continue
    fi

    tg_targets=$(aws --profile=$PROFILE --region=$REGION elbv2 describe-target-health --target-group-arn $tg_arn)
    tg_targets_len=$(echo $tg_targets | jq -r '.TargetHealthDescriptions | length')
    if [ $tg_targets_len -eq 0 ]; then
        echo "tg_name: $tg_name"
        echo "tg_lb_arns: $tg_lb_arns"
        echo "tg_targets_len: $tg_targets_len"
        echo "--------------------------------"
    fi

    echo $tg_targets | jq -r '.TargetHealthDescriptions[] | .TargetHealth.State' | grep -q "healthy"
    if [ $? -ne 0 ]; then
        echo "tg_name: $tg_name"
        echo "tg_lb_arns: $tg_lb_arns"
        echo "tg_targets_len: $tg_targets_len"
        echo "--------------------------------"
    fi
done