Docker Quick Start

Install Docker on CentOS Stream 9 by removing old docker and Podman, setting up the Docker repository, installing docker-ce, docker-ce-cli, containerd.io, and docker-compose-plugin, then enable and start the service.

Launch your first Docker container to test installation using the hello-world image, while learning how the Docker client, daemon, and Docker Hub collaborate to run a container.

Explore launching containers with docker run, including interactive shells (-i -t), background persistence (-d) and automatic restarts (--restart always), while naming containers and listing both running and stopped ones.

Learn to start stopped containers, run commands inside, drop into a container shell, and copy files between host and container, including installing nginx.

Learn to manage docker containers by stopping, starting, removing, pruning stopped containers, renaming, and inspecting metrics with docker stats to ensure only the needed containers run.

Publish a website from a running docker container by configuring nginx, copying content, discovering the container IP, committing to a new image, and mapping ports for external access.

Search and pull container images from registries like Docker Hub, then list, tag, and delete images to manage lifecycle, noting that tags define versions and latest is used if untagged.

Create reproducible container images with a Dockerfile, automating builds and avoiding artifacts. Build, tag, and run images with proper layering and port mapping, then verify with curl.

Create and manage persistent Docker volumes to preserve data across container restarts using docker volume create and docker volume inspect; mount with docker run --mount and verify data remains accessible.