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Service Mesh — Istio and Linkerd¶
Service MeshIstioLinkerdKubernetes 6 min read
Service mesh for microservice architectures. Istio vs Linkerd, mTLS, traffic management and observability.
What is a Service Mesh¶
A service mesh adds networking features (mTLS, retry, circuit breaking, observability) to infrastructure — transparently, without code changes.
- Data plane — sidecar proxy (Envoy) in every pod
- Control plane — configuration and management of proxies
Istio — Traffic Management¶
apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
name: api-server
spec:
hosts: [api-server]
http:
- route:
- destination:
host: api-server
subset: v1
weight: 90
- destination:
host: api-server
subset: v2
weight: 10
timeout: 5s
retries:
attempts: 3
perTryTimeout: 2s
retryOn: 5xx
mTLS¶
# Istio: automatic mTLS (default)
apiVersion: security.istio.io/v1beta1
kind: PeerAuthentication
metadata:
name: default
namespace: production
spec:
mtls:
mode: STRICT # enforce mTLS
# Linkerd: automatic mTLS out of the box
# No configuration needed - default ON
Istio vs Linkerd¶
- Istio — feature-rich, complex, Envoy-based, large community
- Linkerd — simpler, lighter (Rust proxy), faster setup, CNCF graduated
- Recommendation: Linkerd to start, Istio if you need advanced traffic management
Summary¶
Service mesh handles mTLS, traffic management and observability at the infrastructure level. Start with Linkerd for simplicity or Istio for advanced use cases.
Need Help with Implementation?¶
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