Linkerd is an ultra-light, ultra-simple, ultra-powerful open-source service mesh that provides developers with the tools they need to write secure, reliable, observable cloud-native applications. It is the only service mesh to reach CNCF graduated status. Linkerd uses mutual TLS to secure all on-cluster TCP communication with no application changes transparently, instantly adds latency-aware load balancing, request retries, timeouts, and blue-green deploys to keep your applications resilient, and provides instant platform health metrics by tracking success rates, latencies, and request volumes for every meshed workload — all with minimal configuration.