deployment-docker-sample

Dockers are containers for your applications to run on any device/OS. This repo contains commands & setup instructions to deploy a python app to a Docker.

Setting Up & Operating Docker on Localhost

1. Build a simple app (python)
2. Install Docker on your device
3. Setup Docker using CLI commands

Docker CLI Commands

Check version of docker

docker --version

Initialize the docker and create the default files

docker init

Build the image called 'sample-docker' in the current working directory (which is '.')

docker build -t sample-docker .

Run the image 'sample-docker' on localhost (127.0.0.1) by mapping the port 8080 of localhost & docker

docker run -p 127.0.0.1:8080:8080 sample-docker

Your app should be live on http://127.0.0.1:8080/

Create a volume shared between the container & its underlying host

docker run -v C:\Users\u1\Documents:/container_folder sample-docker

Create shared volume by name and attach it between the host & container

docker volume create sample-shared-volume
docker run -v sample-shared-volume:/container_folder sample-docker

Create shared volume for the container & attach the port

docker run -v sample-shared-volume:/container_folder -p 127.0.0.1:8080:8080 sample-docker

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Additional Notes

• Volumes allow data (database & files) to persist even after container shuts down
• Host source is denoted by C:\.. (Windows) or /path/to/folder (Linux/Mac)
• Destination container is denoted by directory after :/folder-name
• Use -p flag to map ports between host and container
• Use -v flag to create volume mounts

Quick Reference

Command	Purpose
docker --version	Check Docker version
docker init	Initialize Docker in current directory
docker build -t <name> .	Build image from Dockerfile
docker run -p <host>:<container> <image>	Run container with port mapping
docker volume create <name>	Create named volume
docker run -v <source>:<dest> <image>	Run with volume mount