How to Dockerize a Python Flask Application
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In this article, we will set up a python Flask application and Dockerize it efficiently in a few minutes.
Steps to Follow
Now, its time to package our application into a docker image. Create a Dockerfile with the following steps:
1. This installs Python3.7 on the image
3. Install all the system requirements that are required for the docker image
4. Let's jump into the working directory:
5. Create a new directory for keeping the Flask application code:
6. Now change the working directory as shown below:
7. Copy all your workspace files into the image:
8. Now, install all your code dependencies from requirements.txt:
9. Don't forget to upgrade your pip:
10. Change your working directory where your packaging is done:
11. Let's shine the docker instructions from here:
We are done with creating the docker file that is required for a docker image. Now, run the docker file to create an image:
Refer to the following article to learn more about Docker Image vs Docker Container. Now, let's create the docker-compose.yml file to run the docker image in a container.
Let's provide the information required for the container to start. We have only one service here, and the image name
docker_flask. Run the app.py file with the
Your make file has does starts your application:
Now, start your container which starts your Python Flask web app.
Now your simple Python Flask application is up and running in the Docker container. Now check the container id, with:
This lists all your docker containers. Check your application logs with:
Hurray, we are done running the flask web app on a docker container!
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