Cilium
Cilium MTU Black Hole: How a Linux Bridge and KubeVirt VMs Silently Broke VXLAN and Kept Longhorn Degraded
24 min readFor about ten hours, roughly 45 Longhorn volumes on one of our production RKE2 clusters sat in a degraded state. Replicas flapped to ERR, rebuilds started and failed, and the …
Kubernetes Network Policies for Zero-Trust Architecture: Enterprise Implementation Guide
12 min readZero-trust network architecture represents a fundamental shift in cloud-native security strategy, requiring explicit authorization for every network connection rather than implicit …
Cilium eBPF Networking Deep Dive: Advanced Kubernetes CNI Implementation
14 min readCilium represents a paradigm shift in Kubernetes networking by leveraging eBPF (extended Berkeley Packet Filter) technology to provide high-performance, secure, and observable …
Cilium BGP Control Plane for Kubernetes: Complete Enterprise Implementation Guide
20 min readBare-metal and on-premises Kubernetes clusters face a fundamental networking challenge that cloud providers solve transparently: making Services and Pods reachable from outside the …
Running K3s in an IPv6-Only Environment with Cilium
6 min readMost guides for Kubernetes focus on IPv4 by default, but IPv6 is no longer a second-class citizen. In this post, I walk through configuring a K3s cluster using only IPv6, with …
RKE2 the Hard Way: Part 8 – Installing Cilium CNI
4 min readPart 8 – Installing Cilium CNI In this part of the “RKE2 the Hard Way” training series, we will install and configure the Cilium CNI (Container Network Interface). Cilium is a …
Cilium Troubleshooting Guide: Commands That Work in 2026
10 min readTroubleshooting Cilium is mostly about running the right command in the right place. This guide is a working reference for current Cilium releases (1.16 through 1.20, with 1.20.3 …
Fixing Argo CD Out-of-Sync Due to Cilium Identity on RKE2
3 min readFixing Argo CD Out-of-Sync Due to Cilium Identity on RKE2 If you’re running a Kubernetes cluster with RKE2 and Cilium as your networking solution, you might encounter a situation …