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Multi-Cloud Networking Guide

$39

Cross-cloud networking patterns with VPN, peering, service mesh, and DNS management for AWS, Azure, and GCP.

📁 24 files

PythonTerraformMarkdownAWSAzureGCP

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📁 File Structure 24 files

multi-cloud-networking/ ├── LICENSE ├── README.md ├── docs/ │ ├── architecture.md │ ├── dns-management.md │ ├── scaling-guide.md │ ├── security-considerations.md │ └── vpn-connectivity-guide.md ├── examples/ │ ├── aws-azure-vpn.tfvars │ └── three-cloud-mesh.tfvars ├── free-sample.zip ├── guide/ │ ├── 01_overview.md │ ├── 02_prerequisites.md │ ├── 03_architecture-summary.md │ └── 04_support.md ├── index.html ├── scripts/ │ ├── connectivity_validator.py │ └── latency_estimator.py └── terraform/ ├── aws-transit-gateway.tf ├── azure-vnet-gateway.tf ├── cross-cloud-dns.tf ├── gcp-cloud-vpn.tf ├── outputs.tf ├── providers.tf └── variables.tf

📖 Documentation Preview README excerpt

Multi-Cloud Networking Patterns

Cross-cloud connectivity templates for AWS, Azure, and GCP — VPN tunnels, transit networking, service mesh, and unified DNS management.

Built by Cloud Architecture Pro — premium reference architectures for senior cloud engineers.

Overview

This product provides production-ready Terraform configurations for connecting AWS, Azure, and GCP networks. Whether you need a simple VPN between two clouds or a full mesh with service discovery, these templates handle the complex networking plumbing so you can focus on workloads.

Every configuration is extensively commented with the "why" behind each setting, including MTU considerations, BGP ASN selection, and failover behavior.

What's Included

Terraform Configurations (7 files)

File	Purpose
`terraform/providers.tf`	Provider configuration for AWS, Azure, and GCP
`terraform/variables.tf`	Input variables with validation and defaults
`terraform/aws-transit-gateway.tf`	AWS Transit Gateway with VPN attachments
`terraform/azure-vnet-gateway.tf`	Azure VPN Gateway with BGP configuration
`terraform/gcp-cloud-vpn.tf`	GCP Cloud VPN (HA) with Cloud Router
`terraform/cross-cloud-dns.tf`	DNS forwarding across cloud boundaries
`terraform/outputs.tf`	Cross-cloud connection status outputs

Documentation

Document	Description
`docs/architecture.md`	Reference architecture with topology diagrams
`docs/vpn-connectivity-guide.md`	VPN tunnel setup, BGP, and failover design
`docs/dns-management.md`	Cross-cloud DNS resolution patterns
`docs/security-considerations.md`	Encryption, key rotation, and access control
`docs/scaling-guide.md`	Bandwidth planning and performance tuning

Scripts & Examples

File	Description
`scripts/connectivity_validator.py`	Validate VPN tunnel and BGP status
`scripts/latency_estimator.py`	Estimate cross-cloud latency and bandwidth costs
`examples/aws-azure-vpn.tfvars`	AWS-Azure VPN tunnel configuration
`examples/three-cloud-mesh.tfvars`	Full three-cloud mesh configuration

Prerequisites

Terraform 1.5+
AWS CLI configured with appropriate credentials
Azure CLI (az login)
GCP CLI (gcloud auth application-default login)
Network permissions in all three clouds

Quick Start


# Initialize Terraform with all three providers
cd terraform/

*... continues with setup instructions, usage examples, and more.*

📄 Code Sample .py preview

scripts/connectivity_validator.py #!/usr/bin/env python3 """ Multi-Cloud Connectivity Validator Validates VPN tunnel status, BGP peer state, and DNS resolution across AWS, Azure, and GCP. Requires cloud CLI tools to be installed. Usage: python connectivity_validator.py python connectivity_validator.py --cloud aws python connectivity_validator.py --output report.json Author: Cloud Architecture Pro License: MIT """ import json import subprocess import sys from datetime import datetime, timezone from typing import NamedTuple class ConnectivityCheck(NamedTuple): """Result of a connectivity check.""" cloud: str component: str status: str detail: str def run_command(cmd: list[str], timeout: int = 15) -> tuple[bool, str]: """Run a CLI command and return (success, output).""" try: result = subprocess.run(cmd, capture_output=True, text=True, timeout=timeout) return result.returncode == 0, result.stdout.strip() except FileNotFoundError: return False, f"Command not found: {cmd[0]}" except subprocess.TimeoutExpired: return False, "Command timed out" def check_aws_vpn() -> list[ConnectivityCheck]: """Check AWS VPN tunnel status.""" checks = [] success, output = run_command([ "aws", "ec2", "describe-vpn-connections", "--query", "VpnConnections[].{Name:Tags[?Key=='Name'].Value|[0],Tunnels:VgwTelemetry[].{IP:OutsideIpAddress,Status:Status}}", "--output", "json", ]) # ... 145 more lines ...

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