Dockerfile Example Python Flask

Mkdir flask_docker_demo cd flask_docker_demo to change the directory. In the following example we create and run a very simple Docker image.

Github Heddle317 Docker Flask Example A Generic Python Flask App With A Docker File

For the Docker bits everything included is an accumulation of Docker best practices based on building and deploying dozens of assorted Dockerized web apps since late 2014.

Dockerfile example python flask. Basic Dockerfile FROM python version WORKDIR working directory you want to run flask app from COPY requirementstxt RUN pip install -r requirementstxt COPY Either bash script to run servernginxetc OR the location of the primary api script relative to the working dir EXPOSE port to expose CMD either your bash script or command to run the flask app. Return jsonifyErrorThis is a GET API method. From flask import Flask jsonify request appFlask__name__ we are importing our function from the colorspy file from colors import top_colors approutemethodsGETPOST def index.

To run your Flask app from the image you can use the command docker run. You always have the option to build off the python image instead. If everything went right youll see the same output on localhost5000.

And as a bonus this post turned out to be a small tutorial on Flask too. Docker pull dockerHubUsernamedocker-flask-example if you changed the name of the repo reflect that here Run. Want this guide for.

Writing the web application using Flask and Redis-py. Were starting from Linux instead of using the Python repository as our base as its more clear in which Python version is being installed what apt installs on Ubuntu or Debian or yum installs on Red Hat and CentOS. Getting the url argument url requestargsgeturl resulttop_colorsstrurl return jsonifyresult else.

Docker run -p 808080 -e ENVIRONMENTproduction -d --nameflask_app dockerHubUsernamerepoName Go to localhost8080 in your browser and you should see your application. For this particular example we only have one service the flask app but hopefully you can see how important it is to organize your applications. Here is a listing of our Dockerfile.

Our example application will be a web page where you can upload an image which will then be scaled down and downloaded back to your computer. From flask import Flask app Flask__name__ from app import views. App - Copies everything in the current directory to app in our container.

Open your terminal and make a folder for your flask application lets say flask_docker_demo by executing the following commands. One can use any other python project in the same manner. When we run the image a simple Python file is.

FROM python372-stretch - Pull the python372-stretch container base image. This tutorial covers simple steps to build and deploy a Flask application using Docker on Ubuntu 1804. This file will contain most of.

With the __init__py file created youre ready to create the viewspy file in your app directory. Lets touch on the contents of our Dockerfile. Python Docker hello example.

This app is using Flask 201 and Python 396. RUN pip install -r requirementstxt - Installs the packages from requirementstxt. Youve made your first docker container with Python Flask.

ENTRYPOINT python -m flask run --host0000 ENTRYPOINT is to identify which executable should be run when a container is started. Build_docker_imagesh docker-composeyml flask_app Dockerfile __init__py download_filessh flask-app-environmentyml flask_apppy start_flask_appsh. From flask import Flask render_template app Flask__name__ We have created a flask app called app.

For more information on Flask visit here. The sample project is written with Flask but you should be able to adapt this to other projects also. Kubernetes is a huge wrench in the works.

Setup Flask and Dockerfile. A Dockerfile is a special file which contains instructions needed to build the Docker image. Docker run --name mycontainer -p 50005000 -d.

WORKDIR app - Sets our working directory as app. Lets start with building a simple python flask app. In this example were going to take you through a simple hello world server written in Python that uses Flask a lightweight web application framework.

Once youve added that code save and close the file. The best indicator of a healthy development workflow is a short feedback loop. The example app is minimal but it wires up a number of things you might use in a real world Flask app but at the same time its not loaded up with a million personal opinions.

I have an example of web application which is written in Python Flask and Redis-py. As a general rule list all the python libraries that you install to create your project inside a file named requirementstxt. Create an apppy file with the following code.

The sample application process data stored in a. Python -m pip install flask. Lets create a simple Python application using the Flask framework that well use as our example.

Running your docker image in AWS. Sudo docker --version Docker version 190312 build 48a66213fe This is the Docker version we use. Create a directory in your local machine named python-docker and follow the steps below to create a simple web server.

Syntaxdockerdockerfile1 FROM python37-alpine WORKDIR code ENV FLASK_APPapppy ENV FLASK_RUN_HOST0000 RUN apk add --no-cache gcc musl-dev linux-headers COPY requirementstxt requirementstxt RUN pip install -r requirementstxt EXPOSE 5000 COPY. Cd pathtopython-docker pip3 install.

Kubernetes Using Cloud Shell Deploy A Python Flask Application