Classic Load Balancer (CLB)

Overview

• It makes routing decisions at either the transport layer (TCP/SSL) or the application layer (HTTP/HTTPS).

• It requires a fixed relationship between the load balancer port and the container instance port.

Listeners

• To start using using CLBs, you must configure one or more listeners.

• Listener:

  • A process that checks for connection requests.

  • It is configured with a protocol and a port for front-end (client to load balancer) connections, and a protocol and a port for back-end (load balancer to back-end instance) connections.

• It supports the following protocols:

  • HTTP

  • HTTPS (secure HTTP)

  • TCP

  • SSL (secure TCP)