What a service mesh solves
WHAT IT TESTS: the purpose of a mesh. OUTLINE: it adds traffic management, security via mTLS, and observability at the network layer through sidecars, beyond what plain Kubernetes offers.
WHAT IT TESTS: whether you can articulate the gap a mesh fills. ANSWER OUTLINE: a service mesh is a dedicated infrastructure layer, usually sidecar proxies plus a control plane, that handles service-to-service communication. Its three pillars are traffic management (routing, retries, canaries), security (automatic mutual TLS and authorization), and observability (golden metrics, distributed traces, access logs). Kubernetes gives you basic L4 Services and DNS but none of these L7 features.
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- #kubernetes
- #service-mesh
- #istio
- #observability
- #networking
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