Tag: docker

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.

Dockerfile: Differences Between COPY and ADD

COPY and ADD look similar but ADD auto-extracts tarballs and fetches URLs — know when each is appropriate and why COPY is usually better.

Docker Strategies for Load Balancing and Failover

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

Docker Networking: Connecting to the Host from a Container

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

Understanding Docker vs. Full Virtual Machines (VMs)

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

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.

Executing Commands with Asterisks in Docker

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

WordPress, Docker, NGINX, and MySQL via Ansible

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

Uptime Monitoring with Uptime Kuma

Uptime Kuma monitors your services and sends alerts when they go down — beautiful self-hosted alternative to UptimeRobot.

Automating Docker via Ansible

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

Observability and Monitoring for Containers

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

Docker vs Podman: Key Differences

Docker needs a daemon; Podman doesn't. Compare architecture, rootless support, Compose compatibility, and which one belongs in your workflow.