Logs Extension

The logs extension surfaces Loki log data inside ArgoCD. Developers can search historical logs, filter by severity, and view log volume charts without leaving ArgoCD.

Registration

The extension registers as:

• Resource tabs on Pod, Deployment, and StatefulSet resources
• App view on any ArgoCD Application (Log Explorer)

What it shows

Resource tabs

Per-resource log views:

• Historical log lines from Loki
• Severity detection (error, warn, info, debug) with color coding
• Time range picker (15m, 1h, 6h, 24h, custom)
• Free-text search filter
• Container selector (for multi-container pods)
• Label-based filtering

Application view (Log Explorer)

Cross-pod log aggregation for the entire application:

• All logs from pods in the application’s namespace
• Volume chart showing log rate over time
• Severity filter buttons
• Search across all containers

Live tail

The logs extension does not support live tail. ArgoCD’s built-in Logs tab handles real-time pod streaming via the Kubernetes API. Loki’s tail API uses WebSocket, which ArgoCD’s proxy extension mechanism does not support.

Severity detection

The backend automatically detects log severity from line content:

• JSON structured logs: "level": "error", "severity": "warn"
• Key-value format (slog, logfmt): level=error, level=warn
• Bracket format: [ERROR], [WARN], [INFO], [DEBUG]
• Fallback: lines without severity markers default to info

Backend

The logs backend queries Loki:

Configuration

RBAC

p, role:developer, extensions, invoke, logs, allow