Docker Compose Example 3 (Custom Network)

 

version: "3"

networks:

 ibm:

  driver: bridge

 oracle:

  driver: bridge

services:

  web:

   image: nginx

   container_name: my-nginx

   networks:

    - ibm

   ports:

    - 80

  database:

    networks:

      - oracle

    image: redis

    container_name: my-db

Next run the docker compose command

docker-compose -f example3-docker-compose.yaml up -d

docker-compose -f example3-docker-compose.yaml down

Let us do another example with volumes

version: '3.8'

services:

  wordpress:

    image: wordpress

    restart: always

    ports:

      - 8080:80

    environment:

      WORDPRESS_DB_HOST: db

      WORDPRESS_DB_USER: exampleuser

      WORDPRESS_DB_PASSWORD: examplepass

      WORDPRESS_DB_NAME: exampledb

    volumes:

      - wordpress:/var/www/html

  db:

    image: mysql:5.7

    volumes:

            - mysqldb:/var/lib/mysql

volumes:

  wordpress:

  mysqldb:

docker-compose -f example8900-dc.yaml up -d

docker ps

# docker-compose -f example8900-dc.yaml ps

docker images

 

docker volume ls

 ls /var/lib/docker/volumes/root_wordpress/

ls /var/lib/docker/volumes/root_wordpress/_data

docker exec -it d396d243a4ba bash

Next type env

Variables, which we have created , we will be able to see 

Similar you can check for other container

Run that container by using docker exec command

Now, Login into AWS Cloud and add the port Numbers

Next step, go back and copy the public IP Address

and browse that by using public ipaddress:8080

Select the language of your choice

Give the site url . Enter the details and click on Install WordPress

Next step, you should be able to login with your site url

You  can create a post, upload media files, Look n feel, comments and other things

Docker Compose -Example 2

 

vi example2-dc.yml

Write the below code

version: '3'

services:

 web:

  image: nginx:1.19

  container_name: test1

  ports:

   - 86:86

 database:

   image: redis:latest

   container_name: my_db

   ports:

     - "5432:5432"

Giving Permissions.

chmod +x /usr/local/bin/docker-compose

Docker Compose

Docker Compose is used to run multiple containers as a single service. For example, suppose you had an application which required NGNIX and MySQL, you could create one file which would start both the containers as a service without the need to start each one separately

Docker compose reads configuration data from a YAML file .

The key difference between docker run versus docker-compose is that docker run is entirely command line based, while docker-compose reads configuration data from a YAML file.

The second major difference is that docker run can only start one container at a time, while docker-compose will configure and run multiple.

Docker Compose Installation

First step is to check if Docker is installed or Not . We can check by using the below command. If Docker is not installed, than you need to install it

InstallCompose
Step 1 − Download the necessary files from github using the following command 
sudo curl -L "https://github.com/docker/compose/releases/download/1.10.0-rc2/dockercompose-$(uname -s) -$(uname -m)" -o /home/demo/docker-compose

Then, Run the below Command.

sudo curl -L "https://github.com/docker/compose/releases/download/v2.1.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

Now, we need to give permissions, for that run the below command

Next, we need to provide execute privileges to the downloaded Docker Compose file, using the following command

chmod +x /usr/local/bin/docker-compose

We can then use the following command to see the compose version.

docker-compose version 

YAML: Yet   Another/Ain't   Mark Up Language

It is basically a key value pair.

vi example1-docker-compose.yaml

version: '3'

services:

  web:

   image: nginx

   container_name: demo

Now let’s run our Docker Compose file using the following command 

docker-compose -f example1-docker-compose.yaml up -d