问题
Hi I am new to AWS and trying to understanding the difference between a load balance, target, target group and security group . I have 2 instances running. Now i want to balance the load coming to these servers. Will load balance be created on a new instance ? what are listeners and how are they different from load balancers?
回答1:
Yes, the load balancer is an EC2 instance to provide the networking and compute services needed for load balancing. This also means that there is a per hour charge for the load balancer EC2 instance.
A Target Group is used to route requests to one or more registered targets (your backed EC2 instances).
A listener is a process that "TCP Listens" for requests from clients. Common listeners are for receiving requests on port 80 (HTTP) and port 443 (HTTPS). The listeners then forward requests to your Target Group.
A Security Group is a firewall that allows or denies network traffic. A security group sits in front (our around) your load balancer protecting it from traffic that you do not allow (want).
There is a lot of information on the Internet. Here is a link to help you get started.
What Is an Application Load Balancer?
来源：https://stackoverflow.com/questions/51428939/what-is-the-difference-between-a-load-balancer-listener-target-target-group-in