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Containers

"New Tag Scanned": What Container Registries Mean By It

A plain explanation of what the "new tag scanned" event actually means in registries like GHCR, ECR, and Docker Hub, and what to do when it flags a vulnerability.

Apr 1, 20265 min read
Containers

Docker Image File Extensions: What a .tar Image Actually Contains

Docker images do not have a special file extension. When you save one it is a .tar archive. Here is what is inside, and how the OCI layout is structured.

Mar 30, 20265 min read
Containers

Container Image Vulnerability Scanning in CI

How to wire container image vulnerability scanning into your CI pipeline so builds fail on real risk instead of shipping unscanned images to production.

Mar 27, 20266 min read
Containers

Rebuilding Docker Images: Cache, Patching, and Reproducibility

A plain docker build reuses cached layers and silently skips your security patches. Here is how the cache actually works, how to force a real rebuild, and how to keep rebuilds reproducible.

Mar 27, 20266 min read
Containers

What Is Docker Used For? A Practical Answer

What Docker is actually used for in real teams: packaging apps, consistent environments, and shipping to production, plus the security angles that come with containers.

Mar 25, 20266 min read
Containers

What Gartner's Container Security Coverage Gets Right (and Skips)

Gartner's container security research correctly frames the shift toward CNAPP consolidation, but its category boundaries often lag how teams actually operate scanning day to day.

Mar 19, 20265 min read
Containers

What Is a Docker Container? A Practical Explanation

A Docker container is a lightweight, isolated unit that packages an app with everything it needs to run — here's what that actually means under the hood and why it matters for security.

Feb 18, 20267 min read
Containers

Best Container Security Tools in 2026

Image scanners, runtime sensors, and Kubernetes posture tools each catch different failures. Here is how the leading options compare in 2026 — and how to pick a stack without buying three overlapping scanners.

Feb 12, 20266 min read
Containers

OSS Container Security: What Changes With Open-Source Base Images

Open-source base images change your patch cadence, your license exposure, and your provenance story — here's what OSS container security actually adds on top of standard image hardening.

Feb 11, 20265 min read

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