Google Cloud Load Balancer Component Diagrams


A Google Cloud load balancer is not a single thing. It is made of many different components that all work together to provide regional or global load balancing to your applications.

What follows are some quick diagrams I have created to better understand how all of the components that make up the various Google Cloud load balancers work together.

Global Load Balancers

Google Cloud global load balancers operate at a global scale.

HTTP(S) Load Balancer

Ports supported: 80, 8080, 443

Read more about HTTP(S) Load Balancing Concepts.

Google Cloud HTTP(S) Load Balancer Diagram

TCP and SSL Proxy Load Balancer

Ports supported: 24, 443, 110, 143, 195, 443, 465, 587, 700, 993, 995, 1883, 5222

Read more about TCP Proxy Load Balancing Concepts.

Read more about SSL Proxy Load Balancing Concepts.

Google Cloud TCP and SSL Proxy Load Balancer Diagram

Regional Load Balancers

Google Cloud regional load balancers operate only within a particular Google Cloud region such as us-central1 or us-east1.

Network Load Balancer

Ports supported: All TCP and UDP ports.

Read more about Network Load Balancing Concepts.

If load balancing one to many virtual machines:

Google Cloud Network Load Balancer to Virtual Machines Diagram

If load balancing to an instance group:

Google Cloud Network Load Balancer to Instance Group Diagram