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Targeting by Tags

This example shows how to use tag selectors to dynamically scope resources based on their labels. Tag-based scoping is the most flexible approach because you can add or remove resources from the scope by simply updating their tags.

homelab-all-resources.yaml
---
apiVersion: mission-control.flanksource.com/v1
kind: Scope
metadata:
  name: homelab-monitoring
  namespace: mc
spec:
  description: All resources in homelab cluster monitoring namespace
  targets:
    - config:
        tagSelector: "cluster=homelab,namespace=monitoring"

The tagSelector uses label selector syntax to match configs with cluster=homelab AND namespace=monitoring tags. All specified tags must match (AND logic within a single selector).

Advantages of Tag-Based Scoping:

  • Dynamic: Resources automatically join/leave the scope when tags change
  • Flexible: No need to update Scope definitions when adding new resources
  • Expressive: Combine multiple tags to create precise filters
  • Maintainable: Centralize resource categorization through tagging strategy

Use Cases:

  • Environment-based access (dev, staging, prod)
  • Application-based grouping
  • Compliance and regulatory boundaries
  • Cost center or team ownership