Tag: Docker

1. Supply Chain Security for Docker Base Images

   Apr 18, 2026

   Every Docker image starts with a base image that the whole team trusts blindly, usually referenced by a tag like latest or a version number without further checks. Supply chain security replaces that blind trust with pinned digests, cryptographic signatures, and traceable provenance information, so a compromised base image does not silently reach production deployments.

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2. Bringing Node, PHP, and Composer Together in Docker Containers

   Apr 17, 2026

   PHP projects need Composer for backend dependencies and Node for asset compilation. Forcing both into a single container is the wrong move, and running both on the host is impractical. Multi-stage builds and cleanly separated build containers solve this elegantly.

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3. Running Parallel Feature Environments with Compose Project Names and Profiles

   Apr 14, 2026

   Anyone needing to check multiple feature branches at the same time quickly hits the limits of a single Docker Compose stack: port conflicts, shared databases and naming collisions between containers and networks. COMPOSE_PROJECT_NAME combined with profiles solves exactly this problem by letting every environment run side by side, cleanly isolated.

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4. Production Docker Checklist: Security, Performance, Storage, and Deployments

   Apr 8, 2026

   Containers on a developer laptop and containers in production are two fundamentally different things. This Docker checklist covers every mandatory category: security hardening, performance limits, storage protection, and repeatable deployment procedures, with concrete commands for each item.

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5. Docker Image Scanning and Security Updates in CI

   Apr 7, 2026

   A Docker image that gets built once and never checked for vulnerabilities again slowly turns into a security hole. Image scanning in the CI pipeline and automatic base image updates close that window before CVEs make it into production.

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6. Alternative Container Registries Beyond Docker Hub

   Mar 25, 2026

   Docker Hub was the default answer for years to the question of where images get stored, yet rate limits, cost and compliance requirements are increasingly pushing teams toward alternative container registries. GitLab, GitHub, Amazon ECR and self hosted Harbor offer different answers to the same question, which registry fits which situation.

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7. Build Once, Deploy Many: Moving One Docker Image Through Every Stage

   Mar 20, 2026

   Anyone who builds a separate Docker image for every environment loses the exact guarantee containers are supposed to provide. Build once, deploy many separates the build step from configuration and ensures that the artifact running in production is exactly the one that was tested in staging, without a single rebuild in between.

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8. Rolling Updates in Docker Swarm Without Downtime

   Mar 17, 2026

   A rolling update replaces containers step by step with new versions, while the service stays continuously reachable for users. Without correctly configured health checks, parallelism and rollback rules, though, a single faulty deployment can still lead to a noticeable outage that a well designed rolling update prevents from the start.

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9. Runtime Threat Detection in Containers with Falco

   Mar 14, 2026

   Image scanning finds known vulnerabilities before startup, but once a container is running, much stays invisible. Falco watches system calls directly in the kernel and detects in real time when a process inside a container behaves differently than expected, for example an unexpected shell, a write to sensitive paths, or an escape attempt.

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10. One Process per Container: When the Rule Helps and When It Doesn't

    Mar 7, 2026

    "One process per container" is one of the most frequently quoted Docker principles, and one of the most frequently misapplied. What the principle really means, where it makes sense, and when Supervisor, s6-overlay or dumb-init are the better decision.

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