如何在.ebextensions中获取负载均衡器的ARN? [英] How to get the ARN of the load balancer in .ebextensions?

问题描述

我想使用ebextensions将cloudwatch警报添加到一个弹性beantalk环境中.

I want to add a cloudwatch alarm to an elastic beanstalk environment using ebextensions.

所以我创建了一个 .ebextensions/cloudwatch-alarms.confg 文件，如下所示:

So I created a .ebextensions/cloudwatch-alarms.confg file that looks like the following:

Resources:
  ELBLatencyAlarm:
    Type: AWS::CloudWatch::Alarm
    Properties:
      AlarmDescription: { "Fn::Join" : ["", [{ "Ref" : "AWSEBEnvironmentName" }, ": HIGH ELB latency." ]]}
      Namespace: AWS/ApplicationELB
      MetricName: Latency
      Dimensions:
      - Name: LoadBalancer
        Value : "arn:aws:elasticloadbalancing:xx-xxxxxx-1:123456789012:loadbalancer/app/awseb-AWSEB-oooooooooooo/12b68287xxxxxxxx"
      Statistic: Average
      Period: 300
      EvaluationPeriods: 1
      Threshold: 
        Fn::GetOptionSetting:
          OptionName: ELBLatency
          DefaultValue: "0.5"
      ComparisonOperator: GreaterThanThreshold

我还没有弄清的一件事是如何使用函数获取负载均衡器的ARN.

One thing that I haven't figured out is how to use functions to get the ARN of the load balancer.

负载均衡器的代码 arn:aws:elasticloadbalancing:xx-xxxxxx-1:123456789012:loadbalancer/app/awseb-AWSEB-oooooooooooooo/12b68287xxxxxxxx 由弹性beantalk创建.在创建环境之前我不知道.

The arn of the load balancer, arn:aws:elasticloadbalancing:xx-xxxxxx-1:123456789012:loadbalancer/app/awseb-AWSEB-oooooooooooo/12b68287xxxxxxxx, is created by elastic beanstalk. I don't know it before the environment got created.

我想我可能可以使用此处获得负载均衡器的信息.但是我还没有想出怎么做.

I think probably I can use the functions described here to get the arn of the load balancer. But I haven't figured how to do it.

有人知道该怎么做吗?

推荐答案

根据

当您将此资源的逻辑ID传递给固有的Ref函数时，Ref将返回负载均衡器的Amazon资源名称(ARN).

When you pass the logical ID of this resource to the intrinsic Ref function, Ref returns the Amazon Resource Name (ARN) of the load balancer.

因此，如果您使用的是当前负载均衡器(即ALB或NLB，而不是CLB)，则应该能够在负载均衡器的逻辑名称上使用 Ref 函数:

So if you're using a current-generation load balancer (ie ALB or NLB, not CLB), you should just be able to use the Ref function on the load balancer's logical name:

Value: !Ref MyLoadBalancer

我还发现了此内建的beantalk资源名称列表，对于获取与自动生成的用于模板的体系结构相关的属性非常有用.

I have also found this list of 'built-in' beanstalk resource-names very useful for getting properties associated with pieces of the architecture that are auto-generated for use in templates.

仅供参考，资源的逻辑名称"通常是您为其分配的名称，作为模板中 Resources 属性的子代，例如

FYI the "logical name" of a resource is usually one you assign it, as a child of the Resources property in your template, e.g.

Resources:
   MyLoadBalancer:
   ...
   MyS3Bucket:
   ...

此处的逻辑名称为 MyLoadBalancer 和 MyS3Bucket .如果尚未定义它们，则使用上面链接中的列表中的名称，因此您的负载均衡器可能是 AWSEBLoadBalancer 或 AWSEBV2LoadBalancer ，具体取决于它是经典版本还是最新版本-gen负载均衡器.

The logical names here are MyLoadBalancer and MyS3Bucket. If you have not defined them then use the names in the list linked above, so your load balancer will probably be either AWSEBLoadBalancer or AWSEBV2LoadBalancer, depending on whether it's a classic or current-gen load balancer.

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