问题描述
这是与我的问题有关的 Cloudformation 模板代码:
This is the Cloudformation template code related to my problem:
"SNSTopic": {
"Type": "AWS::SNS::Topic",
"Properties": {
"TopicName": "JumpboxPresenceTopic",
"DisplayName": "Jumpbox Presence Topic",
"Subscription": [
{
"Endpoint": {
"Fn::GetAtt": [
"Lambda",
"Arn"
]
},
"Protocol": "lambda"
}
]
}
},
"Lambda": {
"Type": "AWS::Lambda::Function",
"Properties": [...]
我可以在 SNS 仪表板中看到该主题:
I can see the topic in the SNS dashboard:
,但它不会显示在lambda函数 Event Sources 面板中:
But it does not display in the lambda function Event Sources panel:
关于这一点的怪异之处在于,如果我创建了一个来自 SNS 仪表板的同一lambda函数的新订阅,因此不会创建新的订阅,因为它将完全相同。但是,现在,如果我查看了 Lambda仪表板中的 Event Sources 面板,则可以看到 SNS的新条目:JumpboxPresenceTopic
:
The weird thing about this, is that if I create a new subscription from the SNS dashboard for that same lambda function, no new subscription is created since it would be an exact duplicate. However, now if I check the Event Sources panel in the Lambda dashboard, I can see a new entry for the SNS: JumpboxPresenceTopic
:
我觉得这是亚马逊方面的问题,但我可能是错的。我的方法有问题吗?还是AWS的限制?
I feel like it's an issue on Amazon's side but I could be wrong. Is there something wrong with my approach or is it a limitation of AWS ?
推荐答案
您必须授予SNS权限才能首先调用Lambda。
这是AWS的示例。请将其从S3更改为SNS,并且不要忘记将SourceArn设置为SNS主题ARN。
You must grant SNS permission to invoke Lambda first.Here is a example from AWS. Please change it from S3 to SNS and don't forget to set SourceArn as the SNS Topic ARN.
http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-lambda-permission.html
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