Kubernetes documentation (opens in a new tab)
The official reference for the tools used in this lesson.
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Images, containers, and Dockerfiles
An image is a stacked filesystem plus metadata; a container is a running instance of one. Every Dockerfile instruction is a layer.
Lesson 1.118m 20sAdvanced8.6k students
Chapters
18:20- 0:00What is Docker?
- 0:27What is a Container?
- 1:00What is an Image?
- 1:18What are we doing Today?
- 1:47It all starts with a Dockerfile - FROM
- 3:20Environment Variables - ENV
- 3:51COPY Command
- 4:20Source files
- 5:57COPY command destination
- 6:39EXPOSE (You don't need this
- 7:17CMD Entry point
- 8:13How to Build a Docker image
- 9:16Building image with a tag
- 9:47How create a container
- 10:47See our container running
- 11:23Stopping and starting containers
- 12:10Cleaning up containers and images
- 12:33Dockerignore files (how to ignore files
- 13:51Docker exec into a container
- 15:23Add file to dockerignore file
- 16:50Other base images
- 17:52Stream Highlight - "Traefik is a series of tubes"
What this lesson covers
- Distinguish an image from a running container
- Write a Dockerfile that builds reproducibly
- Choose a base image deliberately
This lesson sits in Containers and Images, part of DevOps with Docker and Kubernetes. It assumes what came before it and leads directly into the next lesson in the module.
In this lesson you will
- Distinguish an image from a running container
- Write a Dockerfile that builds reproducibly
- Choose a base image deliberately
Resources
Personal notes are coming soon.