Deploying Simple Python application on a Docker container

This guide will go through how to deploy a simple Python Flask App on a docker container and how to validate it.

Prerequists

Please install docker engine. This example uses Centos7. Any other linux flavor should work. Docker can be installed using. https://docs.docker.com/engine/install/centos/

Build and Deploy

Clone the repository

git clone https://github.com/fcam-naveen/hello-world.git
cd hello-world

Build Docker image

docker build -t hello-app:latest . This will build docker image hello-app and check docker image using docker images

Deploy your application

docker run -d -p 8080:8080 --name simple_hello_app -it hello-app

Verification

http://localhost:8080 should return Hello! and
http://localhost:8080/healthz should return

{
  "status": "OK",
  "version": "0.0.1",
  "uptime": "up since 2020-12-28 05:50:28"
}

Debugging

If browser return any failure, please make sure docker container is running. You can check using docker ps -a. If the container STATUS is not Up, you can run docker logs simple_hello_app to check errors.