Cloud Infrastructure Diagram

What this diagram shows

A cloud infrastructure diagram maps the entire deployment of applications and data across cloud provider regions, availability zones, and services. It shows how compute instances, storage, networking, databases, and load balancers interconnect to form a resilient system. The flow represents traffic entering through the internet, passing through security layers like firewalls and WAF, distributing across multiple instances via load balancers, connecting to persistent storage and databases, and returning responses to users. This reveals redundancy, single points of failure, and data paths across your infrastructure.

Key components

• Load Balancer — Distributes incoming traffic across multiple compute instances to prevent any single server becoming a bottleneck.
• Compute Instances — Virtual machines or containers running application code, typically deployed across multiple availability zones for fault tolerance.
• Security Groups / Firewall — Controls inbound and outbound traffic at the network level, restricting access to only necessary ports and protocols.
• Database Layer — Managed relational or NoSQL database service storing persistent application data with backup and replication.
• Object Storage — Scalable storage service for static assets, backups, and logs, typically accessed via API or CDN.
• VPC / Network — Isolated virtual network environment defining subnets, routing rules, and connectivity between cloud resources.

When to use it

Use this diagram when designing or documenting a cloud deployment, planning infrastructure scaling, communicating system architecture to stakeholders, or identifying security gaps and redundancy needs. It is essential for architecting multi-tier applications, showing how requests flow through the system, and clarifying which resources exist in which availability zones. This template suits AWS, Azure, Google Cloud, or hybrid deployments where you need to show both logical service relationships and physical distribution.

Common mistakes

• Omitting availability zones and showing all instances in a single zone, which hides the lack of true redundancy against regional outages.
• Forgetting to include the security layer between the internet and compute, making it unclear how DDoS attacks or unwanted traffic are blocked.
• Placing the database in the same subnet and security group as the web tier without demonstrating network segmentation and restricted access patterns.

Adapting it to your system

Replace generic instance names with your actual service names and image types (for example, NodeJS app servers or Python workers). Add or remove components based on your stack: include CDN, caching layers, message queues, or monitoring services if they are critical to your design. Adjust the number of availability zones to match your region choice and resilience requirements. Label subnets with actual CIDR ranges and use colour coding to distinguish between public-facing, private, and database tiers. Include data flows with annotations showing protocols (HTTP, HTTPS, TCP) and port numbers.