Linkerd vs Traefik Mesh

Linkerd is a service mesh for Kubernetes that adds runtime debugging, observability, reliability and security without requiring changes to application code. It installs into a Kubernetes cluster and injects sidecar proxies into workload pods. The mesh handles HTTP, HTTP/2, gRPC and arbitrary TCP traffic, including TLS connections and WebSockets. It automatically enables mutual TLS between meshed applications and supports authorization policies between services. Metrics include request volume, success rates and latency distributions for HTTP, HTTP/2 and gRPC, plus TCP-level metrics. Traffic controls include load balancing, retries, timeouts, dynamic routing, traffic splitting and rate limiting. Linkerd can use Prometheus and Grafana and supports distributed tracing. Its Linkerd Viz Prometheus instance retains metrics for a short fixed interval, currently six hours, so it is intended to supplement an existing metrics store. Installation requires a modern Kubernetes cluster and a working kubectl command. The open-source project is licensed under Apache 2.0; Buoyant offers commercial support, training and architecture reviews. The listed plan is free.

Traefik Mesh is a free, open-source service mesh designed for use in Kubernetes. It routes traffic through proxy endpoints on each node and runs the mesh controller in a dedicated pod, without sidecar containers. Existing services remain outside the mesh until they are added through Traefik Mesh service names. Services can be configured with annotations or Service Mesh Interface (SMI) objects, and ACL mode can require authorization between resources using SMI TrafficTarget resources. Traffic controls include retries, circuit breakers, rate limits, and SMI traffic splitting; examples cover HTTP and TCP services. A built-in debugging API is accessed through the controller pod rather than exposed as a service. Installation uses a Helm chart and requires Kubernetes, CoreDNS or KubeDNS, and Helm v3. The compatibility page lists Kubernetes 1.21, 1.22, and 1.23 as its latest supported minor versions, and says general functionality is not guaranteed for older versions. Traefik Mesh does not provide mutual TLS or implement the SMI Traffic Metrics specification. It is self-hosted and listed for Kubernetes.