Container Security
In-depth guides and analysis on container security from the Safeguard engineering team.
283 articles
Kubernetes Admission Controller Policy Patterns in 2026
A field guide to the admission control patterns that survived contact with production clusters: validating webhooks, image policy, mutating defaults, and what to skip.
How to set up OPA Gatekeeper for Kubernetes admission con...
A step-by-step guide to OPA Gatekeeper Kubernetes admission control: install, write constraint templates, roll out safely, and verify enforcement.
Fargate/ECS Container Supply Chain Pitfalls
The parts of container supply chain that break differently on AWS Fargate and ECS compared to Kubernetes, and what to do about each one in production.
Container Runtime Showdown: runc vs crun vs gVisor in 2026
A practical comparison of runc, crun, and gVisor across performance, isolation, and operational fit, with concrete guidance on when each runtime earns its place in production.
Firecracker vs Cloud Hypervisor vs Kata Containers: 2026 Buyer Guide
A practical comparison of Firecracker, Cloud Hypervisor, and Kata Containers across boot time, memory overhead, security boundary, and operational fit for serverless and multi-tenant workloads.
OCI + CNCF Image Supply Chain: 2026 Snapshot
Where the OCI and CNCF image supply chain ecosystem actually sits in 2026, what has stabilized, what is still contested, and what to deploy now versus later.
What is a Golden Image
A golden image is the hardened template every server and container is cloned from — powerful for consistency, dangerous when it goes stale. Here's how to secure it.
What is Image Signing
Container image signing binds a cryptographic signature to an image's digest so you can prove what's running is what was actually built — not just scanned.
What is Admission Control (Kubernetes)
Admission control is the last checkpoint in Kubernetes before an object is written to etcd — here's how webhooks, PSA, and policy engines enforce it.
Sigstore Policy Controller for K8s in Production
How the Sigstore Policy Controller actually runs in production, what it does better than Kyverno, and the operational pitfalls nobody mentions in the quickstart.
Cilium Tetragon Runtime Security with eBPF
A practical look at Cilium Tetragon for Kubernetes runtime security, what eBPF gives you that audit logs do not, and where Tetragon fits in a real stack.
Deploying Falco for Runtime Security in 2026
A pragmatic deployment guide for Falco 0.41 in production Kubernetes: driver selection, rule tuning, alert routing, and the operational debt teams underestimate.