PlantUML Deployment Diagram: Cloud Infrastructure

Cloud Infrastructure Deployment Diagrams

Deployment diagrams show the physical (or virtual) infrastructure where your software runs. For cloud-native systems, they map services to cloud resources.

AWS-Style Deployment

@startuml
title Production Infrastructure (AWS)

cloud "AWS" {
  node "VPC" {
    node "Public Subnet" {
      [ALB] as LB
      [NAT Gateway] as NAT
    }

    node "Private Subnet - App" {
      node "ECS Cluster" {
        [Web Service\n(3 tasks)] as WEB
        [API Service\n(5 tasks)] as API
        [Worker Service\n(2 tasks)] as WRK
      }
    }

    node "Private Subnet - Data" {
      database "RDS PostgreSQL\n(Multi-AZ)" as RDS
      database "ElastiCache Redis\n(Cluster)" as REDIS
    }
  }

  [S3 Bucket\n(Static Assets)] as S3
  [CloudFront CDN] as CF
  queue "SQS Queue" as SQS
  [Lambda\n(Image Resize)] as LAMBDA
}

actor User

User --> CF
CF --> S3
CF --> LB
LB --> WEB
LB --> API
API --> RDS
API --> REDIS
API --> SQS
SQS --> WRK
WEB --> API
S3 --> LAMBDA

@enduml

Node Types

Keyword	Use For
node	Servers, VMs, containers, logical groups
database	Databases, caches, object stores
cloud	Cloud provider boundary
queue	Message queues
[component]	Software components running on a node

Network Zones

Nest nodes inside other nodes to show network topology. Public subnets contain internet-facing resources. Private subnets contain application and data resources. This hierarchy documents your security boundaries.

Scaling Annotations

Add replica counts in the component label (e.g., [API Service\n(5 tasks)]) to document the expected scale. This helps ops teams understand the baseline resource allocation.

Multi-Region Setup

node "US-East-1" {
  [Primary API] as P1
  database "Primary DB" as PDB
}

node "EU-West-1" {
  [Replica API] as P2
  database "Read Replica" as RDB
}

P1 --> PDB
P2 --> RDB
PDB --> RDB : async replication

Deployment diagrams make multi-region architectures and replication strategies visible at a glance.