Tag: devops

Add load balancing and failover to your Docker setup using Swarm, nginx, HAProxy, and Keepalived, high availability without Kubernetes.

Access services on the host machine from inside a Docker container using host-gateway or host.docker.internal, no hardcoded IPs.

Containers share the kernel; VMs have their own. Understand the isolation trade-offs, overhead differences, and when to use which.

Run multiple commands in one docker exec call by piping a heredoc to the container shell, chain dependent steps and skip repeated container roundtrips.

Shell globbing breaks inside docker exec because of how args are parsed, here's how to pass wildcards and asterisks correctly.

Master tmux for dev work: sessions, windows, panes, layout scripting, hooks, and pane syncing, the commands that turn one terminal into many.

Ansible configures servers; Terraform provisions infrastructure, learn when to use each, how they overlap, and why you probably need both.

Automate a full WordPress stack deployment, Docker, nginx, and MySQL, using Ansible playbooks instead of clicking through wizards.

Ansible, Puppet, Salt, and Chef all do configuration management, but they're very different. Pick the right one before you commit.

Speed up Ansible playbooks with pipelining, forks, fact caching, and async tasks, stop watching the spinning wheel on every play.

Automate Docker container deployment with shell scripts, cron, and Ansible, stop SSHing in and restarting things by hand.

Logs, metrics, and traces for Docker containers, Prometheus, Loki, Grafana, and OpenTelemetry to know what's happening inside your stack.