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Discussion on: What is docker?

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aaahmedaa profile image
Ahmed Khaled MOhamed Author

so is there a difference between docker and the virtualenv in python or do i just compared the un-comparing stuff ?

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blardo profile image
Anthony Blardo™

Virtualenv provides dependency isolation for a specific programming language - it lets you use different versions of Python and keep the pip packages you want located within the project space you setup.

Docker is a similar concept in that it keeps things isolated, but it steps down a tier lower in the stack. Docker lets you build containers that are effectively smaller operating systems in a can that can leverage the host OS's resources through the Docker daemon.

You can create a Dockerfile that creates a container which installs Python, installs the pip dependencies using a Pipfile inside the container, and then run the app using that container all without causing an impact to the local filesystem on the machine that is executing the container.

A Docker container's only contract to the outside world is exposing a port to allow traffic to communicate into the service inside of the container.

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kayis profile image
K

Is it a good idea to use this for front-end dev-environments?

I had some issues with npm and nodejs versions back in the days, would be nice if I could create a something stable that would minimize dev-env setup and would always build my stuff.

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davids89 profile image
David

Yes, it's perfect to make isolated projects and configure a specific version of dependecies.

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kayis profile image
K

Does Docker for Mac work with Xcode (cli stuff)?

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davids89 profile image
David

I use it in Mac with the terminal to use the cli

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kayis profile image
K

I want to build iOS apps with the Xcode cli tools and fastlane, that's why I'm asking :)

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davids89 profile image
David

By the official website

Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications, whether on laptops, data center VMs, or the cloud.

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davids89 profile image
David

The virtualenv is a enviroment to install some dependencies. With Docker you can simulate a machine without using a virtual operative system.

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kalyanik1 profile image
Kalyanik1

Hi David,

I am trying to install hyper-ledger framework on aws server.As the server is being shared by multiple users I have been asked to do installations within my pip virtual env.

Now for Hyperledger , docker is one of the prerequisites , so should I install docker within virtualenv or install docker in root and then create virtual env?

Or if docker is there I do not need to use virtual env and docker will take care of separate environments.
Purpose of Virtual env here is only to maintain separate workspace.

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davids89 profile image
David

You can create a docke for every environment