Is there any way to send a http request to all instances in a AWS ELB? [closed]

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Closed 4 years ago.

I will make an array of Varnish servers using Amazon Auto Scaling. With that, I'll have to send a purge request to all servers that are as healthy on the load balancer.

It is possible? What is the easiest way to do? Should I use API?

回答1:

That's fairly straightforward using awscli / API.

1. Get healthy instance IDs from ELB using aws elb describe-instance-health. Lots of examples here: AWS CLI - elb describe-instance-health

2. Get IP addresses of your healthy instances by using aws ec2 describe-instances. Docs here: AWS CLI - ec2 describe-instances

3. Once you have IP addresses just do what is needed on your EC2 instances (make sure your security groups are set up properly).

来源：https://stackoverflow.com/questions/30445647/is-there-any-way-to-send-a-http-request-to-all-instances-in-a-aws-elb