docs/decisions/0004-hybrid-cloud-architecture.md

ADR-0004: Hybrid Cloud Architecture (Proxmox + Azure)

Status: Accepted Date: 2025-01-27 Deciders: Infrastructure team

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Context

We need infrastructure that provides:

• On-premises control and data sovereignty
• Cloud scalability and services
• Cost optimization
• Flexibility

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Decision

We will use a hybrid cloud architecture:

• On-Premises: Proxmox VE for compute and storage
• Cloud: Azure for cloud services and Arc integration
• Integration: Azure Arc for unified management
• Rationale: Balances control, scalability, and cost

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Consequences

Positive

• ✅ Data sovereignty
• ✅ Cost optimization
• ✅ Unified management via Azure Arc
• ✅ Flexible deployment options

Negative

• ⚠️ More complex infrastructure
• ⚠️ Requires hybrid expertise
• ⚠️ Network connectivity considerations

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Status: Accepted