我可以在我们以外的地方发送一条关于云观察警报的短信吗？

看起来AWS不提供SMS作为美国东部以外的SNS主题订户的协议.我想连接我的CloudWatch警报并在出现故障时收到短信,但无法将其发送到SMS.

有没有办法做到这一点？

是!

经过一番挖掘,我能够让它发挥作用.它比仅选择一个主题或输入一个警报要复杂一点,但效果很好!

解决方案的关键是使用AWS的lambda函数!

数据流是这样的:

> Alarm triggered
>  -> Push notification to SNS
>  -> SNS posts to lambda
>  -> lambda reposts to SNS on us-east-1
>  -> subscriber receives message

只是服务:

> CloudWatch Alarm   (us-west-2) 
>  -> SNS            (us-west-2) 
>  -> Lambda         (us-west-2)
>  -> SNS            (us-east-1)
>  -> SMS subscriber (us-east-1)

我不会过多地谈论设置SNS或设置lambda,你可以查看已经存在的示例.但是,我将分享我为执行此操作而编写的lambda代码.您可以使用发布消息到主题功能来测试它.

console.log('Loading function');

var Aws = require('aws-sdk');

var usEastSns = new Aws.SNS({
    accessKeyId: "ENTER YOUR ACCESS KEY HERE",
    secretAccessKey: "ENTER YOUR SECRET KEY HERE",
    region: "us-east-1",
    logger: console
});

exports.snsProxy = function(event, context) {
    var message = event.Records[0].Sns;
    console.log("received message: ", message);
    var newMessage = buildNewMessage(message);
    console.log("publishing: ", newMessage);
    usEastSns.publish(newMessage, function(err, data) {
        if (err) {
            console.log(err, err.stack); // an error occurred
        } else {
            // It's important that we succeed in the callback
            // otherwise it seems to succeed without sending
            console.log(data);           
            context.succeed(message);    
        }
    })
};

function buildNewMessage(message) {
    // For some reason the message that gets sent in the event
    // does not contain the same interface as what the library
    // expects so it needs to be created
    return {
        TargetArn: "ENTER YOUR ARN IN US EAST HERE",
        Message: message.Message,
        Subject: message.Subject,
        MessageAttributes: collectAttr(message.MessageAttributes)
    };
}

function collectAttr(attrs) {
    var newAttrs = {};
    for (var attr in attrs) {
        newAttrs[attr] ={
            DataType: attrs[attr].Type,
            StringValue: attrs[attr].Value
        }
    }
    return newAttrs;
}

除了已经在lambda函数中的aws-sdk之外,这不需要任何其他库.如果您不想要它,您可以随意省略控制台日志记录,但它对调试很有用.

如果您使用测试功能,它可能会失败.我相信这是因为回调永远不会发生.

请记住,lambda不应该在us-east-1上,因为它将在你正在使用的任何区域被触发.

教程链接:

SNS发布api:

http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/SNS.html#publish-property

如何在lambda中使用node.js:

http://docs.aws.amazon.com/lambda/latest/dg/programming-model.html

关于使用其他aws函数的非常棒的教程:

http://docs.aws.amazon.com/lambda/latest/dg/with-s3-example.html