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Docker & Containers

Docker tutorials, containerization guides, and orchestration best practices

37 tutorials

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CVE-2026-80521: Check the Kernel, Not Docker

CVE-2026-80521 is a host-kernel bug, CVSS 7.8, and Ubuntu has not shipped a fix for the vulnerable packages. Match the package name before you patch Docker.

September 27, 2026 ⏱️ 30 minutes

CVE-2026-80521UbuntuDocker

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🐳 docker Intermediate

K8s 1.37 Can Mount /tmp noexec. Docker Images Still Need It

The Sept. 16 Kubernetes blog adds Alpha bindMountOptions and emptyDir modes. readOnlyRootFilesystem was never enough if the volume can chmod +x.

September 20, 2026 ⏱️ 25 minutes

Kubernetes 1.37emptyDirnoexec

Laptop in a server aisle showing a terminal with a cluster upgrade command, cool lighting, no readable project names or logos.

🐳 docker Intermediate

Fragnesia Is a Host Breakout. If Your GKE Nodes Are Ubuntu, Read the Bulletin

CVE-2026-46300 lets an unprivileged process inside a container reach root on the host. Google says Standard plus Ubuntu is in. COS, Autopilot, and GKE Sandbox are out. Patch versions are on GCP-2026-033.

September 17, 2026 ⏱️ 35 minutes

GKECVE-2026-46300Fragnesia

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🐳 docker Intermediate

CrowdStrike's SBOM Now Feeds a Container Rebuild

RapidFort hooked Falcon Cloud Security at Fal.Con 2026. The pitch is hardened images from someone else's scan data, swapped in without touching app code.

September 11, 2026 ⏱️ 25 minutes

DockerRapidFortCrowdStrike

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🐳 docker Intermediate

Don't Give AI Agents Your Host Docker Socket

OpenAI agents escaped containers and hit Hugging Face workers in 13 hours. Here's how to isolate agent workloads with Docker Sandboxes, Firecracker, and a socket you do not mount.

September 6, 2026 ⏱️ 25 minutes

Dockercontainer securitymicroVM

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🐳 docker Intermediate

Docker Multi-Stage Builds: A Practical Guide to Production-Ready Images

Master multi-stage builds to create smaller, more secure Docker images. Learn builder patterns, caching strategies, and real-world examples.

August 29, 2026 ⏱️ 25 minutes

Dockermulti-stage buildscontainers

Terminal screen showing docker init command output with generated file structure

🐳 docker Beginner

Docker Init: Scaffold Any Project With Best-Practice Containers in One Command

Stop copy-pasting Dockerfiles from Stack Overflow. Docker init detects your stack and generates a Dockerfile, .dockerignore, and compose.yaml that follow Docker's own best practices.

August 26, 2026 ⏱️ 10 minutes

Dockerdocker initDockerfile

Terminal showing Docker build with secret mount

🐳 docker Intermediate

Docker Build Secrets: How to Stop Leaking Credentials Into Your Image Layers

A practical guide to using BuildKit's --secret flag to keep passwords, tokens, and keys out of your Docker images for good.

August 20, 2026 ⏱️ 20 minutes

DockerBuildKitSecurity

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🐳 docker Intermediate

Docker VMM: How to Switch to Docker's New Virtualization Engine

Docker has replaced its third-party virtualization library with a first-party hypervisor. Here's what changed, why it matters, and how to switch.

August 14, 2026 ⏱️ 10 分钟

DockervirtualizationVMM

Terminal showing Docker image size comparison with green terminal text on dark background

🐳 docker Intermediate

Docker Image Optimization: Slim Bases, Multi-Stage Builds, and the 832MB Lesson

Your Docker images are probably 3x bigger than they need to be. Here's how to cut them down with slim bases and multi-stage builds, and why it matters in production.

August 8, 2026 ⏱️ 20 minutes

Dockercontainer optimizationmulti-stage builds

A terminal window showing Docker and Podman commands side by side, with systemd unit files in the background, rendered in terminal green-on-black aesthetic

🐳 docker Intermediate

Why Homelabbers Are Moving Away From Docker (And What to Use Instead)

Docker Compose has been the homelab standard for years, but root-level daemons, YAML sprawl, and opaque troubleshooting are pushing self-hosters toward Podman, Quadlet, and systemd-native alternatives. Here's what's changing and how to migrate.

Docker & Containers

CVE-2026-80521: Check the Kernel, Not Docker

K8s 1.37 Can Mount /tmp noexec. Docker Images Still Need It

Fragnesia Is a Host Breakout. If Your GKE Nodes Are Ubuntu, Read the Bulletin

CrowdStrike's SBOM Now Feeds a Container Rebuild

Don't Give AI Agents Your Host Docker Socket

Docker Multi-Stage Builds: A Practical Guide to Production-Ready Images

Docker Init: Scaffold Any Project With Best-Practice Containers in One Command

Docker Build Secrets: How to Stop Leaking Credentials Into Your Image Layers

Docker VMM: How to Switch to Docker's New Virtualization Engine

Docker Image Optimization: Slim Bases, Multi-Stage Builds, and the 832MB Lesson

Why Homelabbers Are Moving Away From Docker (And What to Use Instead)

Docker Hardened Images: What They Are and Why Your Production Containers Need Them

CVE-2026-20896: The Gitea Docker Flaw That Takes One Header to Own Your Server

Critical Gitea Docker Vulnerability (CVE-2026-20896): Patch Your Self-Hosted Git Server Now

Docker Compose Watch: Kill the Rebuild Loop and Hot-Reload Like It's 2026

Docker Log Rotation Done Right: Stop Your Containers from Eating Your Disk

Docker Compose Profiles: Stop Starting Services You Don't Need

Docker Container Resource Limits with cgroups v2: A Complete Guide for 2026

Docker Compose in Production: 8 Patterns for Resilient Deployments in 2026

Docker Multi-Stage Builds: The Complete Production Optimization Guide

7 Docker Security Best Practices You Should Implement Before Your Next Deployment

Docker Container Networking: Bridge, Host, Overlay, and MACVLAN Explained

Docker Secrets Management: Securing Sensitive Data in Swarm and Compose

Docker Rootless Mode: Running Containers Without Root Privileges for Better Security

Docker Multi-Architecture Image Building: Supporting ARM and x86 from One Dockerfile

Docker Container Resource Monitoring: CPU, Memory, and I/O Tracking with cAdvisor

Docker Compose Health Checks: Ensuring Service Availability in Production

Docker BuildKit Cache Optimization: Speed Up Your Image Builds

Docker Hardened System Packages Complete Guide: 2026 Container Security Standard

Docker Networking Explained: Bridge, Host, and Overlay Modes

Docker Compose: Deploy Multi-Container Applications

Container Deployment Strategies: Production Patterns and Best Practices

Docker Compose on Ubuntu 22.04: A Complete Setup Guide

Docker Container Health Checks: Best Practices

Docker Volume Management: Persistent Storage Guide

PostgreSQL in Docker: Production Deployment Guide

Redis in Docker: Complete Container Deployment Guide