EC2 实例状态更改警报 Lambda、云事件和 SNS

Question

我希望如果我的 ec2 的状态发生变化，那么我将收到一个 SNS，其中包含 ec2 名称、实例 ID 和帐户名称、区域。

import boto3

def lambda_handler(event, context):

    # Extract Instance ID from event
    instance_id = event['detail']['instance-id']

    # Obtain information about the instance
    ec2_client = boto3.client('ec2')
    instance_info = ec2_client.describe_instances(InstanceIds=[instance_id])
    instance = instance_info['Reservations'][0]['Instances'][0]

    # Extract name tag
    name_tags = [t['Value'] for t in instance['Tags'] if t['Key']=='Name']
    name = name_tags[0] if name_tags is not None else ''

    # Send message to SNS
    MY_SNS_TOPIC_ARN = 'arn:aws:sns:ap-southeast-2:123456789012:foo'
    sns_client = boto3.client('sns')
    sns_client.publish(
        TopicArn = MY_SNS_TOPIC_ARN,
        Subject = 'Instance Change State: ' + instance_id,
        Message = 'Instance: ' + instance_id + ' has changed state\n' +
                  'State: ' + instance['State']['Name'] + '\n' +
                  'IP Address: ' + instance['PublicIpAddress'] + '\n' +
                  'Name: ' + name
    )

出现以下错误...

START RequestId：7c29aec4-2d51-4b29-91a0-8fc1217397ce 版本：$LATEST “细节”：KeyError 回溯（最近一次通话最后）： 文件“/var/task/lambda_function.py”，第 6 行，在 lambda_handler instance_id = event['detail']['instance-id'] KeyError：“详细信息”

Answer 1

您是否通过 cloudwatch 事件创建触发器并根据 EC2 实例状态更改创建 cloudwatch 事件？

乍一看，事件模式预览是

{
  "source": [
    "aws.ec2"
  ],
  "detail-type": [
    "EC2 Instance State-change Notification"
  ]
}

因此，请检查以上内容，并提供有关您的案例的更多信息。