Docker Image and Container

Docker Image and Container

Docker enables developers to easily pack, ship, and run any application as a lightweight, portable, self-sufficient container, which can run virtually anywhere. … Containers do this by enabling developers to isolate code into a single container. This makes it easier to modify and update the program

Docker_ enables developers to easily pack, ship, and run any application as a lightweight, portable, self-sufficient container, which can run virtually anywhere. … Containers do this by enabling developers to isolate code into a single container. This makes it easier to modify and update the program_

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Lets start by defining a docker file. It is a simple file which includes details about base image, dependencies and command line argument (if needed).The below docker file is to create simple python based docker image.

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The first line denoted the base image I am using to create docker. And then I am copying all the files and folder from my current directory to docker pod.Just to be clear, the folder structure is as shown below.

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cmd.py

cmd.py is a simple python script to print “Hello World” with a help of flask framework. The text file requirement.txt includes all the necessary libraries I need to run the script. From the .py file it is very evident that I need only “flask”, hence I can replace the fourth line of dockerfile with “RUN pip install flask”. 🙏

Now lets launch Docker to create an image!

Once we are in the folder location, we need to run a very simple command

dockerfiles docker docker-image containers python

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