Architecture Decision Records
This directory contains Architecture Decision Records (ADRs) documenting significant architectural decisions made for this Kubernetes platform.
What are ADRs?
ADRs are documents that capture important architectural decisions along with their context and consequences. They help:
- Preserve knowledge: Understand why decisions were made, not just what was implemented
- Enable better decisions: Learn from past trade-offs when making future choices
- Onboard new team members: Quickly understand the reasoning behind platform design
- Facilitate discussions: Provide structured format for evaluating alternatives
Each ADR follows this structure:
- Status: Proposed, Accepted, Deprecated, Superseded
- Context: The issue motivating this decision
- Decision: The change we’re proposing or have agreed to implement
- Consequences: What becomes easier or more difficult because of this change
- Alternatives Considered: Other options that were evaluated
Index
| ADR |
Title |
Status |
| ADR-001 |
Use Argo CD App-of-Apps Pattern |
Accepted |
| ADR-002 |
Use Thanos for Multi-Cluster Metrics Aggregation |
Accepted |
| ADR-003 |
Use Envoy Gateway Over Traditional Ingress Controllers |
Accepted |
| ADR-004 |
Use Sealed Secrets for GitOps Secret Management |
Accepted |
| ADR-005 |
Centralized Ops Cluster Topology |
Accepted |
| ADR-006 |
Multi-Cluster GitOps with Single Control Plane |
Accepted |
Contributing
When making a significant architectural decision:
- Create a new ADR using the template
- Number it sequentially (e.g.,
0007-<title>.md)
- Update this README with the new entry
- Set status to “Proposed” initially
- After review and acceptance, update status to “Accepted”
References