AWS Lambda &SNS:跨区域调用Lambda [英] AWS Lambda & SNS: Invoke Lambda cross-region
问题描述
我在多个区域部署了一个 Lambda 函数.我想向将调用这些函数的 SNS 发布一条消息.
I have a Lambda function deployed to several regions. I would like to publish a message to SNS that will invoke these functions.
我使用 aws-cli 创建了主题,授予 Lambda 与 SNS 对话的权限,并创建订阅.订阅似乎已成功创建,我可以在 AWS 控制台中看到它.但是,它不起作用.不会调用 lambda 函数.
Using aws-cli I've created the topics, given Lambda permission to talk to SNS, and create the subscriptions. The subscription appears to be created successfully, and I can see it in the AWS console. But, it doesn't work. The lambda function does not get invoked.
推荐答案
这是基于 CloudFormation
的示例.您必须将 SNS
的调用权限添加到 Lambda
函数:
This is CloudFormation
based example. You have to add invoke permission for SNS
to the Lambda
functions:
{
"Type" : "AWS::Lambda::Permission",
"Properties" : {
"FunctionName" : { "Fn::GetAtt" : [ "YourLambda", "Arn" ] },
"Action" : "lambda:InvokeFunction",
"Principal" : "sns.amazonaws.com",
"SourceArn" : { "Ref" : "YourSNSTopicArn" }
}
}
然后您需要将您的 Lambdas
订阅到您的 SNS
主题.这可以通过 API 调用或通过 CloudFormation
来完成.
Then you need to subscribe your Lambdas
to your SNS
topic. This can be done via API call or through CloudFormation
.
{
"Type" : "AWS::SNS::Topic",
"Properties" : {
"TopicName" : "YourTopicName",
"Subscription" : [ {
"Endpoint" : { "Fn::GetAtt" : [ "YourLambda", "Arn" ] },
"Protocol": "lambda"
} ]
}
}
如果您遗漏了其中任何一项,您的 Lambdas
将不会被调用.以上信息来源为官方博客文章InvokingLambda 通过 SNS 运行.
If you're missing any of this, your Lambdas
won't invoke. Source for the above information is the official blog article Invoking Lambda functions via SNS.
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