find alb target group for given ec2

find_ec2_target_group.sh

#!/bin/bash

# 检查是否提供了实例ID和区域作为参数
if [ -z "$1" ] || [ -z "$2" ]; then
    echo "Usage: $0 <Instance ID> <AWS Region>"
    exit 1
fi

# 从命令行参数获取实例ID和AWS区域
INSTANCE_ID="$1"
AWS_REGION="$2"

# 查询实例是否存在
instance_info=$(aws ec2 describe-instances --region $AWS_REGION --instance-ids $INSTANCE_ID)

# 检查实例是否存在
if [ -z "$instance_info" ]; then
    echo "EC2 instance with ID '$INSTANCE_ID' not found in region $AWS_REGION."
    exit 1
fi

# 提取实例所属的VPC ID
vpc_id=$(echo "$instance_info" | jq -r '.Reservations[0].Instances[0].VpcId')

# 查询实例所属VPC中的所有目标组ARN
target_group_arns=$(aws elbv2 describe-target-groups --region $AWS_REGION --query "TargetGroups[?VpcId=='$vpc_id'].TargetGroupArn" --output text)

# 存储匹配的目标组
matching_target_groups=()

# 检查实例是否已注册到某个目标组
for target_group_arn in $target_group_arns; do
    targets=$(aws elbv2 describe-target-health --region $AWS_REGION --target-group-arn $target_group_arn --targets "Id=$INSTANCE_ID" --query "TargetHealthDescriptions" --output text)
    if [ -n "$targets" ]; then
        matching_target_groups+=($target_group_arn)
    fi
done

# 输出匹配的目标组
if [ ${#matching_target_groups[@]} -gt 0 ]; then
    echo "Target Groups for EC2 instance ID '$INSTANCE_ID' in region '$AWS_REGION':"
    for target_group_arn in "${matching_target_groups[@]}"; do
        echo "$target_group_arn"
    done
else
    echo "EC2 instance ID '$INSTANCE_ID' is not registered in any Target Groups in VPC '$vpc_id' in region '$AWS_REGION'."
fi

./find_ec2_target_group.sh