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Cover image for Understanding Docker: part 1 – Retrieve & Pull images

Understanding Docker: part 1 – Retrieve & Pull images

aurelievache profile image Aurélie Vache ・1 min read

Understanding Docker can be difficult or time-consuming. In order to spread knowledges about Cloud technologies I started to create sketchnotes about Docker. I think it could be a good way, more visual, to explain Docker (and others technologies like Kubernetes and Istio).

We start the serie of Docker Sketchnotes with a focus about retrieve and pull images.

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As usual, if you like theses sketchnotes, you can follow me, and tell me what do you think. I will publish others sketchs shortly :-).

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aurelievache profile

Aurélie Vache

@aurelievache

Cloud Developer - Google Developer Expert on Cloud - CKAD - Duchess France, Toulouse Data Science, DevFest Toulouse Leader/Organizer - speaker & sketchnoter newbie

Discussion

markdown guide
 

Sketchnotes were unknown to me, but is very easy to read and understand. I have one question: this command

$ docker pull myrepo/ubuntu:lastest

get all layers from this latest version, right?

$ docker pull-all-tags ubuntu 

And get all versions/tags from the repository, right?

Say that, which a difference between getting all layers from a tag and getting all tags?

Thanks!

 

Docker pull my-image:version allows you to pull only one image in only one version.
For example you want to pull the latest version of Ubuntu images.

Second commands allows you to pull (retrieve) all the version of an image.

A version is specified in a tag.

Is it a little bit clear?

Thanks