9_Docker_Compose

Docker Compose

1. Installation

❖ Install docker-compose on your machine, if not already installed.

$ sudo curl -L https://github.com/docker/compose/releases/download/1.21.2/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose

• Add executable permissions to Docker-compose program

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

❖ Check docker-compose version.

$ docker-compose --version

2. Creating compose files

❖ Create a directory named nginx in your root.

$ sudo mkdir nginx

❖ Switch to that directory and create a file named docker-compose.yml

$ cd nginx
$ sudo vi docker-compose.yml

version: '3'
services:
  databases:
    image: mysql
    ports:
      - "3307:3306"
    env_file:
      - evs.env    
  web:
    image: nginx    
    ports:
      - "82:80" 
    depends_on:
      - databases

Depends on: priortizes task -> If this container is not up, wont up rest containers.

82:80 -> Input to Output

❖ Create the environment file for passing as parameter to docker-compose.yml file

$ gedit evs.env

MYSQL_ROOT_PASSWORD=redhat08
MYSQL_DATABASE=nginxdb
MYSQL_USER=root

3. Running images using docker-compose

❖ Save docker-compose.yaml file and do docker-compose up.

$ docker-compose up –d

Launches all specified container in the .yml file

$ docker ps

❖ Verify nginx service is up and is accessible on machine.

$ curl localhost:80

❖ Stop and remove your docker container using docker-compose.

$ docker-compose down