DevSecOps & Security Basics (2026)

In modern DevOps, security is not a final gate - it is built in from the first commit. That practice is DevSecOps.

What is DevSecOps?

DevSecOps integrates security into the DevOps pipeline from the start, so vulnerabilities are caught during development and CI/CD rather than after release.

Why shift-left?

"Shift-left" means moving security earlier in the lifecycle. Fixing a vulnerability in code review costs a fraction of fixing it in production - earlier is cheaper, faster and safer.

Common DevSecOps tools

• Trivy: scans container images for known vulnerabilities.
• SonarQube: static code analysis for bugs and security issues.
• Snyk: finds and fixes vulnerabilities in dependencies.

These run automatically in CI/CD so insecure code never reaches production unchecked.

Kubernetes security basics

Containers and Kubernetes need their own protections:

• RBAC: role-based access control - grant least privilege to users and services.
• Secrets management: never bake passwords or keys into images; use Kubernetes Secrets or a vault.
• Network policies: restrict which pods can talk to which - default-deny, then allow only what is needed.
• Image scanning: only deploy trusted, scanned images from a known registry.
• Pod security: avoid running containers as root and limit their capabilities.

The mindset

Security is everyone's job in DevOps. Automating scans and applying least privilege everywhere is what keeps fast-moving systems safe.