Container

ELI5 — The Vibe Check

A container is a running instance of a Docker image — it's the lunchbox you made and actually opened to eat from. Your image is the recipe; a container is a prepared meal. You can run many containers from the same image at the same time, each one isolated from the others.

Real Talk

A container is a runnable instance of a container image. Containers are isolated processes that share the host OS kernel but have their own filesystem, network, and process namespace. They are ephemeral by default — stopping a container discards any data not stored in volumes.

Show Me The Code

# List running containers
docker ps

# Execute a command in a running container
docker exec -it my-container bash

# Stop and remove a container
docker stop my-container && docker rm my-container

When You'll Hear This

"How many containers are running in prod right now?" / "The container crashed — check the logs with docker logs."