Lab 31 :Docker Compose

                                         Docker Compose

What is the Docker Compose why we use?

Docker Compose is a tool for defining and running multi container  Docker applications with Compose,you  use a YAML file to configure you are applications services.Then, with single,command,You create and start all services from your configuration.

Compose works in all environments:Production,Staging,Development,testing,as well as  CL work flows.

Pre-Requisities:

Make sure you have already installed both docker Engine and Docker Compose .Dont need to install python or redis,as both are provided by docker images.

Launch an instance and allow 6379 port for Redis.otherwise you get an error.

Step1: Login to the server

 

Install docker and docker compose

Htttps://docs.docker.com/compose/install/

Follow the above link to install docker compose

Now first install Docker

#yum install docker

 

 

Start the service

#systemctl start docker

 

Now install docker compose

 

After installing docker and docker compose

Now create a directory for the project.

 

Go to the Directory

Create a file called app.py in your project directory and paste this in:

 

Create another  file called requirements.txt in your project directory and paste this in:

fdisk

redis

 

In your project directory,create a file named Dockerfile and paste the following;

 

0

 

Create  a file called docker –compose.yml in your project directory and paste the following

version:'3'

services:

Now build and run the app with docker compose

#docker –compose up

 

Enter https://0.0.0.0.5000/in a browser to see the applications running

 

You will get a page like this.