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Cilium Network Policies, from first principles to production

This post teaches the Cilium policy model with clear scenarios and annotated YAML. It matches the style of practical technical blogs, explanation first and code second, with links to the official docs where you will want deeper detail. Why Cilium policy Kubernetes’ built-in NetworkPolicy objects define which pods can communicate using label-based rules at the … Continue reading Cilium Network Policies, from first principles to production

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Fixing “Kubernetes configuration file is group-readable or world-readable” warnings

The Issue When using kubectl or oc you may see warnings that your Kubernetes configuration file is readable by group or by everyone. WARNING: Kubernetes configuration file is group-readable. This is insecure. Location: /home/user/cluster/admin-kubeconfig WARNING: Kubernetes configuration file is world-readable. This is insecure. Location: /home/user/cluster/admin-kubeconfig The Cause The kubeconfig file has permissions that allow access … Continue reading Fixing “Kubernetes configuration file is group-readable or world-readable” warnings

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Zoom Error 5456000 – An unknown error occurred – Unable to Connect

The Issue I’ve been plagued with this issue on one single macos device for a while and I’ve not been sure as to why, I’ve tried uninstalling and reinstalling to no avail, and google wasn’t much help. Ultimately the Zoom app itself couldn’t connect to meetings. An unknown error occurred Error code: 5456000 The Cause … Continue reading Zoom Error 5456000 – An unknown error occurred – Unable to Connect

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Safely Clean Up Orphaned First Class Disks (FCDs) in VMware vSphere with PowerCLI

vSphere Orphaned First Class Disk (FCD) Cleanup Script Orphaned First Class Disks (FCDs) in VMware vSphere environments are a surprisingly common and frustrating issue. These are virtual disks that exist on datastores but are no longer associated with any virtual machine or Kubernetes persistent volume (via CNS). They typically occur due to: Unexpected VM deletions … Continue reading Safely Clean Up Orphaned First Class Disks (FCDs) in VMware vSphere with PowerCLI

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Learn KubeVirt: Deep Dive for VMware vSphere Admins

As a vSphere administrator, you’ve built your career on understanding infrastructure at a granular level, datastores, DRS clusters, vSwitches, and HA configurations. You’re used to managing VMs at scale. Now, you’re hearing about KubeVirt, and while it promises Kubernetes-native VM orchestration, it comes with a caveat: Kubernetes fluency is required. This post is designed to … Continue reading Learn KubeVirt: Deep Dive for VMware vSphere Admins