Docker Container Labels: The Metadata You're Ignoring
Docker labels are free metadata for filtering, routing, and documentation. Learn label conventions and leverage them with filters and tools.
Tag: devops
All the articles with the tag "devops".
Why Docker Builds Are Slow: Layer Cache Explained
Layer caching is your build's BFF. Learn why copying files early kills the cache and how to fix it.
The .dockerignore File You're Not Writing
Missing .dockerignore bloats build context, slows builds, and leaks secrets. Here's the one you should copy-paste.
Understanding and Optimizing Docker’s daemon.json File
daemon.json controls how the Docker daemon behaves — logging drivers, storage drivers, registry mirrors, and the options worth tuning.
Optimize Ubuntu Logs: btmp Log Rotation
btmp logs failed logins and grows forever on internet-facing servers. Set up logrotate to keep it under control before your disk fills up.
Ansible: Task and Role Inclusions for Efficient Automation
Stop copy-pasting Ansible tasks across playbooks — use include_tasks, import_tasks, and roles to keep your automation DRY and maintainable.
Docker Networking Essential Guide for All Skill Levels
Bridge, host, overlay, macvlan, and none — every Docker network mode explained with real use cases from beginner to production.
Understanding CMD and ENTRYPOINT in Dockerfiles
CMD and ENTRYPOINT both define what runs in a container but work differently — exec vs shell form, and how they interact when combined.
Copying Files Between Docker Containers and Host Machines
Use docker cp to move files between running containers and your host machine — no volumes needed for one-off file transfers.
Multiple Actions with a Single docker exec Call
Run multiple commands in one docker exec call using sh -c — pipe commands, chain with && or ;, and avoid repeated container roundtrips.
Tmux for Streamlining Dev Workflow
tmux sessions, windows, and panes for developers — layouts, plugins, and the .tmux.conf that makes it feel like a proper IDE.
Ansible vs. Terraform: Cloud Infrastructure Management
Ansible configures servers; Terraform provisions infrastructure — learn when to use each, how they overlap, and why you probably need both.