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Docker#

Oh my! Docker, Images, Containers!#

Let's talk these.

When someone talks about Docker, they usually mean containers in
general. It is quite likely that they have not used anything else but
the docker command or Docker Desktop. That is absolutely OK.
Let's clarify some vocabulary:

  • ****Container**** that's the thing runs anything you like, a
    webserver, a database server, an email server, ...
  • ****Container Image**** this is what you need to create a container.
    You can't think of it like a cookiecutter. You can as many cookie as
    you like, it will always be the same as long as you use the same image
  • Dockerfile this is what you use to create an image. You do
    ****not**** have to use a Dockerfile, there are a few options.
    Another option is a general containerfile. Systems like podman use
    a containerfile, it is --- usually --- compatible with a
    Dockerfile.

How does this look?

  • #BUG: Enable mermaid
%%{ init: { 'flowchart': { 'curve': 'monotoneX' } } }%%
graph LR

dockerfile[/Dockerfile/]
containerfile[/Containerfile/]

podman_build[podman]
docker_build[docker]

image(Image)
container[/Container/]


subgraph build
  direction LR
  docker_build
  podman_build
end

containerfile-->podman_build
dockerfile-->podman_build
dockerfile-->docker_build

subgraph runtime
container
end

podman_build & docker_build-->image-->container

Prepare your environment#

  • #BUG: Add a section about installing other tools
  • #BUG: Rancher Desktop
  • #BUG: Podman Desktop

Docker Containers#

  • Running a container from an existing image

  • docker run

  • docker run --volume ...
  • docker run --volume ... --port ...

  • docker run --volume ... --port ... --entrypoint

  • ****Building a container from an existing image****

  • docker build ...

  • docker buildx ...