Cloud Architects and Systems Engineers
Designing a high-availability internal architecture for a multi-tier cloud application
Use cases
About
The Internal TCP UDP Load Balancing template provides a technical deep dive into regional load balancing architectures for Virtual Private Cloud (VPC) networks. This 159-node cheat sheet covers the essential mechanics of distributing traffic among VM instances using an internal IP address, specifically focusing on the separation of the frontend (forwarding rule) and the backend (backend service and instance groups). It serves as a comprehensive Internal TCP UDP Load Balancing mind map for cloud architects, detailing how the service operates as a managed, non-proxy solution where clients send traffic to backends directly without intermediate device termination. The template explicitly outlines the Three-tier web service model, illustrating how an external HTTP(S) load balancer can interface with an internal backend load-balanced database tier to ensure high availability and regional scalability.
Terms and ConditionsWhen to use this template
DevOps and Network Reliability Engineers
Troubleshooting traffic distribution and health check failures in a VPC network
IT Managers and Technical Trainers
Onboarding new team members to cloud-native networking and load balancing concepts
How to use this template
Step 1
Download and open the file
Download the .xmind file and open it in Xmind desktop or the web app to view the full 159-node architecture.
Step 2
Customize the network parameters
Navigate to the 'Internal IP address' and 'Forwarding rules' branches to replace placeholder values with your specific VPC configurations.
Step 3
Export for technical documentation
Use the Export feature to save the mind map as a high-resolution image or PDF for inclusion in your project's technical design documents.
Frequently asked questions
This template includes a detailed breakdown of regional load balancing components, including forwarding rules, backend services, health checks, and session affinity options. It covers architectural characteristics, such as the non-proxy nature of the service, and specific networking requirements like VPC peering and global access configurations for client connectivity.
As noted in the 'Protocols, scheme, and scope' section, the template clarifies that each internal load balancer supports either TCP or UDP traffic, but not both at the same time. It provides guidance on how to configure forwarding rules and port specifications for each protocol type.
You can use the 'Three-tier web service' branch to map out how an external HTTP(S) load balancer acts as the web tier while relying on an internal load balancer for the database or application tier. This helps in visualizing traffic flow from the internet to internal backend services.
Yes, this template is fully editable. You can customize the 159 nodes to reflect your specific VPC architecture, update IP address ranges in the 'Internal IP address' section, or add your own instance group details to the 'Backend service' branch.
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