Sidecar Pattern

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A co-located helper process deployed alongside the main application that handles cross-cutting concerns: logging, monitoring, networking, security. The application communicates with the sidecar via localhost. The basis of service mesh architecture (Envoy sidecar). Deployed as a separate container in the same pod (Kubernetes).

Key Properties

• Co-Located Process
• Cross-Cutting Concerns
• Language Agnostic

Related

• Service Mesh (built on the sidecar pattern)
• Bulkhead (sidecars provide resource isolation)

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distributed-systems patterns