This guide explains the background, architecture, and step‑by‑step deployment of Multus CNI in a Kubernetes cluster, including configuring Calico and Flannel as primary and secondary networks, creating network attachment definitions, and testing pod connectivity across multiple interfaces.
This article explains how Kubernetes forwards packets from the initial web request through container networking, covering the Kubernetes network model, Linux network namespaces, the role of the pause container, pod‑to‑pod communication on the same and different nodes, CNI plugins, and how services use Netfilter and iptables to rewrite traffic.
This article explains Kubernetes' fundamental network requirements, the pod networking model, the role of CNI plugins, common implementation approaches, and how Network Policies provide fine-grained traffic control, offering a comprehensive overview of container networking within cloud-native clusters.
This article explains Kubernetes' network model, covering container‑to‑container, pod‑to‑pod, pod‑to‑service, and external traffic flows, while detailing network namespaces, veth pairs, Linux bridges, iptables/IPVS load‑balancing, and cloud‑native solutions like LoadBalancer and Ingress controllers.
This article explains the fundamentals of VXLAN, why it is preferred over VLAN, and provides a step‑by‑step guide on configuring Flannel in VXLAN mode within a Kubernetes cluster to achieve cross‑node pod communication.
This article explains what the Container Network Interface (CNI) is, how Kubernetes uses CNI plugins, guides the step‑by‑step configuration process, compares Overlay, Routing and Underlay implementations, and provides practical criteria for selecting or building a CNI plugin that fits specific environments and performance needs.
