Could you explain what is the purpose of "Docker" use and recommend some good references on it?

Hi Experts

Could you explain what is the purpose of "Docker" use and recommend some good references on it?

Is it in some manner near "git" ?

From a day to another I had to start using this software.

There's a "pletora" of materials on internet but some of them could be more adequated.

Thanks in advance.
Eduardo FuerteDeveloper and AnalystAsked:
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peprCommented:
Frankly, my head is not big enough to wish to use the all-wrapping beasts like Docker (if you mean the https://www.docker.com/).

On the other hand, Git is just perfect tool for any developer, in my opinion. To put it together, Docker uses Git for the purpose that was given to Git by its authors. However, Docker adds tools and the other things to make every IT boss of a big company happy (in my opinion).

I can answer your questions about Git, but I do not have experience with Docker. Is your question related more to Docker or to Git?
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Eduardo FuerteDeveloper and AnalystAuthor Commented:
Hi

In my case Docker  is imposed by the client/ project. I have to use it...
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peprCommented:
OK. Then Git is only the part of the "Developer Toolkit". I know nothing about the rest. Anyway, if you feel that you should learn more about Git, the Pro Git book (on-line and also PDF for free) is a very good way to learn about it.
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Eduardo FuerteDeveloper and AnalystAuthor Commented:
But,  more specifically on Docker itself... any other suggestions?
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peprCommented:
Sorry, I know nothing about Docker. You have to wait for the comment of the others.
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Phil PhillipsDevOps ArchitectCommented:
I haven't used Docker extensively, but it's a tool that allows you to package applications into a "container" with everything that it needs so that it can run on any Linux instance.  For a pretty good quick overview, check out:  https://opensource.com/resources/what-docker

And just for fun, this comic is about Kubernetes (a Docker competitor), but still does a pretty good job of going over the overall concepts of containers and why you would use them: https://www.bloomberg.com/features/2017-kubernetes/

Docker pairs nicely with git since one of the big uses of Docker is image versioning and continuous integration.  Basically, with your code in version control (i.e. git), you can set up a build process that would build and package the code into a Docker image.  Now, you'd be able to test this Docker image in a test environment.  If things look good, you can deploy to production - the nature of Docker makes it so that you could avoid having something work in the test environment but then fail in production.
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Eduardo FuerteDeveloper and AnalystAuthor Commented:
Hi Phil

A good overall explanation.

Thank you!
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