Networking

A guide to the ip link show type and ip address show type commands in Linux for filtering network interfaces by type. Covers physical, virtual, and tunneling interface types with practical examples.

A deep dive into how Kubernetes DNS resolves service names to IP addresses, covering A records, SRV records, search domains, and the full lookup path from pod to CoreDNS. Understanding this lifecycle is essential for debugging connectivity issues and designing resilient microservice architectures.

A practical walkthrough of the Kubernetes Gateway API using the NGINX Gateway Controller, covering HTTP routing, TLS termination, traffic splitting, and multi-protocol support. The concepts are implementation-agnostic and apply across any Gateway API-compatible controller.

Kubernetes provides a built-in DNS service that assigns predictable names to Services and Pods within a cluster. By default, pods use cluster.local as their search base for internal DNS resolution, enabling communication through human-readable names rather than ephemeral IP addresses.

An overview of the ports and protocols required by Kubernetes control plane and worker nodes. Includes guidance on overriding default port configurations in strict network environments.

Network namespaces provide the foundation for container network isolation in Docker and Kubernetes. This guide covers listing, creating, and linking namespaces, bridging, NAT, and how Docker and Kubernetes build on these primitives.