Explanation

These pages provide conceptual background and design intent for the COS stack. Use this section to understand the why and how behind our architecture, telemetry model, and operational choices.

Overview

A high-level introduction to observability and the model-driven approach COS makes use of.

• What is Observability?
• Model-Driven Observability

Topology & stack variants

Information about deployment topology, the Juju model layout, and the different stack variants available (COS, and COS Lite).

• Juju Topology
• Stack variants

Architecture & design

These pages describe the architecture decisions, design goals, and the telemetry pipelines we rely on. They are useful when evaluating how COS fits into your observability strategy or when designing integrations.

• Design Goals
• Logging Architecture
• Telemetry Flow
• Telemetry correlation
• Telemetry Labels
• Data Integrity

Alerting & rules

Guidance about built-in alerting, charmed alert rules and how rules are designed and managed across the stack.

• Charmed alert rules