Featured guide
Building Minimal Container Images with Multi-Stage Builds
- Docker
- Container Security
- beginner
One Go service built two ways, then compared on size, packages, scanner findings and the user it runs as.
Sachin Chaurasiya
DevOps · DevSecOps · Cloud Security
Building and Securing Production Systems. Every Guide Verified in the Terminal.
In-depth engineering guides, hands-on labs and field notes on Kubernetes, CI/CD, containers, infrastructure and cloud security. Practical. Reproducible. Security-aware.
- Terminal verified
- Versions stated
- Reviewed regularly
- Kubernetes
- Docker
- GitLab
- Cloud
- Security
- Observability
Where do you want to start?
Three ways to explore, learn and build real-world skills.
Latest engineering notes
Recent articles, guides and field notes from the site.
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Argo CD ApplicationSets for Multi-Environment Delivery
- CI/CD
- Argo CD
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Attestations and Provenance: Binding the SBOM to the Image
- DevSecOps
- Cosign
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Cloud Identity and Least Privilege: Humans, Workloads and CI
- Cloud Security
- IAM
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Cloud Network Security Boundaries: Exposure, Tiers and Default Deny
- Cloud Security
- Network Security
Learning paths
Ordered, hands-on paths from fundamentals to production. Three to start with; 9 in all.
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DevSecOps Pipeline
Path 01Security gates developers can live with: secrets, SAST and image scanning in GitLab CI and Jenkins.
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Kubernetes Operations
Path 07Run workloads on a real cluster: controllers, probes and limits, real failures, Services and DNS, scaling.
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Platform Engineering
Path 09One contract, four components: environments from Git, a golden CI path, guardrails through GitOps, visibility.
Hands-on labs
Learn by doing. Reproducible labs with step-by-step instructions.
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Secure Docker Images with Trivy
Scan a deliberately weak image and rebuild it until the fixable HIGH/CRITICAL gate passes.
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Scan Git Repositories with Gitleaks
Seed fake secrets, catch them in history and working tree, block the next one at commit time.
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Generate an SBOM with Syft and Scan It with Grype
Produce CycloneDX and SPDX SBOMs for an image and gate on fixable findings with Grype.
Explore by topic
Browse content by topic area.
Sachin Chaurasiya
DevOps & DevSecOps Engineer
Certified: CKS · CKA · Azure DevOps
Works on CI/CD and release engineering, infrastructure as code, Kubernetes and container hardening, secrets management and supply-chain integrity. These notes are the material you would hand a colleague before they touch a pipeline or a cluster.
Principles
- Technical accuracy
- Reproducible content
- Security-focused
- No hype, no fake numbers