This guide explains Kubernetes IP address types, CIDR planning, CNI plugin IPAM strategies, practical management tactics, troubleshooting steps, and advanced tips to ensure scalable and conflict‑free networking for your clusters.
This article explains Kubernetes' container networking fundamentals, covering the basic network requirements, IPAM implementation with node CIDR allocation, Linux veth and bridge mechanisms, overlay solutions like VXLAN, and the role of BGP for cross‑cluster pod reachability.
This article details the design, implementation, and production rollout of a container VPC solution that leverages ipvlan for CNI, a custom IPAM integration with OpenStack/Ultron, and extensive operational fixes to achieve reliable, high‑performance networking for Kubernetes workloads across multiple clusters.
The article explains how Kubernetes allocates Pod IPs—from cluster and node CIDR configuration, through the kubelet‑driven Pod lifecycle and CNI IPAM process, including dual‑stack support, hostNetwork handling, and optional IP reservation/reclamation mechanisms for stable stateful workloads.
This article provides a detailed overview of Calico's essential and optional components, explaining how each part—such as the API server, Felix, BIRD, confd, Dikastes, CNI plugin, datastore plugin, IPAM plugin, kube‑controllers, Typha, and calicoctl—contributes to networking and network policy enforcement in Kubernetes clusters.
This article explains how Kube-OVN extends its IP address management to other CNI plugins, supports multi‑NIC scenarios, and provides step‑by‑step instructions with YAML examples for installing Kube-OVN, configuring NetworkAttachmentDefinitions, creating Subnets, and deploying Pods with static or dynamic IPs.
This article details Qunar's adoption of Calico as a CNI solution, covering its three‑layer architecture, core components, large‑scale deployment practices, IPAM behavior, pod‑to‑pod and pod‑to‑external traffic flows, encountered issues, and the overall benefits for a production Kubernetes environment.
NetBox 2.9.1, an IP address and data center infrastructure management tool built on Django and PostgreSQL, introduces several enhancements including SLAAC address status, nested LAG support, version details on error pages, and a backward‑compatible remote authentication backend parameter.
Kube‑OVN 0.7.0 introduces IPAM optimizations for StatefulSet, new Subnet CRD status fields, default traffic mirroring, IPv6 control‑plane support, updated documentation, and a detailed TCP performance test showing only a 4% throughput loss for packets larger than 2 KB compared to host networking.
