DEV Community

vinayak
vinayak

Posted on • Originally published at itsvinayak.hashnode.dev on

Dockerizing Python Application

#python #docker #coding #software

Docker provides the capability to package and run an application in a loosely isolated environment called a container. It is an open platform for developing, shipping, and running applications.

In this article, we will demonstrate, how to dockerize a python flask app. For this purpose, we will use our blockchain project.

Get the Application

For running Application we need to follow certain step :

  • clone the repository from github 
git clone https://github.com/itsvinayak/blockchain.git
Enter fullscreen mode Exit fullscreen mode
  • View the contents of the cloned repository 🗂

Installing Docker in Ubuntu (linux) 

sudo apt-get update -y


sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \
    lsb-release -y
Enter fullscreen mode Exit fullscreen mode

Adding gpg " GnuPrivacy Guard" key 

sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
Enter fullscreen mode Exit fullscreen mode

Adding APT Sources 

sudo echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null


sudo apt-get update -y && sudo apt-get install docker-ce docker-ce-cli containerd.io -y
Enter fullscreen mode Exit fullscreen mode

Starting docker 

systemctl start docker
systemctl enable docker
docker --version
Enter fullscreen mode Exit fullscreen mode

Writing Docker File

In this project, We will create a docker file with name Dockerfile.

FROM python
LABEL maintainer="vinayak"
LABEL version="1.0"
LABEL description="This is a blockchain implementation in python"
LABEL website="https://github.com/itsvinayak/blockchain"
LABEL email="itssvinayak@gmail.com"
COPY . /app
WORKDIR /app
RUN pip install -r requirements.txt
EXPOSE 8080 
CMD ["python", "server.py"]
Enter fullscreen mode Exit fullscreen mode

Building Docker Image 

sudo docker build --tag blockchain .
Enter fullscreen mode Exit fullscreen mode

Here --tag name and optionally a tag in the 'name:tag' format.

Running Docker Image

Listing all images 

sudo docker image ls
Enter fullscreen mode Exit fullscreen mode 


sudo docker run -d -p 8080:8080 blockchain
Enter fullscreen mode Exit fullscreen mode

Server in now running at proof at port 8080.

Stopping docker image

listing running docker container 

sudo docker container ls
Enter fullscreen mode Exit fullscreen mode

Stopping running container 

sudo docker container stop a2115d1010b5
Enter fullscreen mode Exit fullscreen mode

Where a2115d1010b5 is running container id

All codes with docker files are present on GitHub

Top comments (0)

Read next

smythp profile image

Deep Dive 🤿: Where Does Grype Data Come From?

Patrick Smyth -

limal profile image

Reclaiming free disk space from a private Docker repository

Łukasz Wolnik -

dchaley profile image

Performance trap: general libraries & helper objects

David Haley -

hakeem profile image

Concurrency and Parallelism in Python

Hakeem Abbas -