What if your Kubernetes cluster simply refused to run unsigned images? I spent some time experimenting with enforcing image provenance in a small Kubernetes setup using MicroK8s. The idea was simple: Only container images with valid cryptographic signatures are allowed to run in the cluster. For this I used: GitLab CI/CD (build + signing pipeline) Cosign / Sigstore (image signing) Kyverno (admissi
El problema real Gestionar infraestructura manualmente sigue siendo uno de los mayores puntos de fricción en equipos DevOps. Cambios no auditados, configuraciones inconsistentes entre ambientes y despliegues manuales generan errores difíciles de rastrear y operaciones poco confiables. La solución moderna es automatizar completamente el ciclo de vida de infraestructura y despliegue utilizando Inf
Most teams I have worked with have one auth test in their suite. It looks like this: test('valid token verifies', () => { const token = signSync({ sub: 'user-1', aud: 'api://backend' }, secret); const result = verify(token, options); expect(result.valid).toBe(true); }); That test is fine. It is also a smoke test, not a regression suite. It catches the case where verification is completely b
The on-call alert at 02:14 said auth_5xx_rate spiked from 0.01 to 31.4. Not a deploy window. Not a traffic spike. Just thirty-one percent of authenticated requests failing for ~four minutes, then back to baseline. The cause was a JWKS rotation on the issuer side. New keys came in. Old keys went out. Caches in our service didn't refresh fast enough. Tokens signed with the new key were rejected beca
When most developers want to scan their code for security vulnerabilities, they install Semgrep or Snyk and call it a day. I did the opposite. I built one from scratch. Not because the existing tools are bad — they're excellent. But because I'm transitioning from 13 years of software engineering into application security, and I wanted to understand what a SAST tool actually is underneath the hood.