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 options is a general containerfile. Systems like podman use a containerfile, it is — usually — compatible with aDockerfile.
How does this look?
%%{ init: { 'flowchart': { 'curve': 'monotoneX' } } }%%
graph LR
dockerfile[/Dockerfile/]
containerfile[/Containerfile/]
image(Image)
container[Container]
dockerfile & containerfile --> image --> container
Prepare your environment
- Rancher Desktop
Docker
- 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 ...
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