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Container Security

Wolfi OS: The Linux Distribution Built for Secure Containers

Wolfi is not a general-purpose Linux distro. It exists to solve one problem: provide secure, minimal, up-to-date packages for container images. Here is why that matters and how to use it.

Mar 22, 20246 min read
Container Security

VM to Container: Supply Chain Implications of the Migration

What changes in your software supply chain when you move from virtual machines to containers, and how to adapt governance, scanning, and provenance accordingly.

Mar 8, 20247 min read
Container Security

Kubernetes Secrets Encryption Providers Reviewed

etcd encryption at rest finally works out of the box. The question is which provider you use, and the trade-offs have sharpened in 2024.

Mar 5, 20248 min read
Container Security

gVisor Runtime Security Deep Dive

gVisor intercepts syscalls in userspace and implements a minimal kernel in Go. It is a genuinely different approach, with genuinely different trade-offs.

Feb 18, 20247 min read
Container Security

How to Enforce Cosign Signatures in Kubernetes Admission

A hands-on tutorial for blocking unsigned container images at the Kubernetes admission layer using Cosign, Sigstore policy-controller, and keyless verification.

Feb 15, 20245 min read
Container Security

Container Runtime Security Comparison: runc, gVisor, Kata, and Firecracker

Your container runtime determines the strength of your isolation boundary. Here is an honest comparison of runc, gVisor, Kata Containers, and Firecracker from a security perspective.

Dec 12, 20237 min read
Container Security

OpenShift Security Context Constraints: A Guide

SCCs predate Pod Security Admission by a decade and are more powerful. That power is also why OpenShift newcomers find them confusing.

Dec 6, 20237 min read
Container Security

Chainguard Images: The Zero-CVE Container Base Image Revolution

Chainguard ships container images with zero known CVEs. That sounds like marketing until you understand how they build them. Here is the technical reality behind the claim.

Nov 22, 20236 min read
Container Security

Container Escape Techniques in 2023: What's Changed and What Hasn't

Container escapes remain a real threat in multi-tenant environments. A look at the latest techniques, CVEs, and defenses as container security matures in 2023.

Nov 5, 20235 min read
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