Docker-compose

This section shows some of the useful commands for Docker-compose. … it is a good practice to do compose stuff from a independent folder

installation of docker-compose

download and house the app /usr/local/bin

$ udo curl -L "https://github.com/docker/compose/releases/download/1.28.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

change the mode of the docker-compose to executable

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

• check the version of docker-compose using docker-compose version

Steps to try docker-compose

• create an arbitary folder say docker-demo and cd to it, it is the project folder

• create an app folder and write an index.html file with some static contents

• create an docker-compose.yml in the project folder

/docker-demo
|
|--app
|    |
|    |--index.html
|
|--docker-compose.yml    

• content of the docker-compose.yml is as follows

this file uses 3.7 version of the compose syntax, the configuration of services is done below having one web service that uses the image of nginx:alpine as a reverse proxy. The port 8000 is used from the host system which maps to the port 80 of the container. The volume for the container is mapped from app folder of host to /usr/share/nginx/html in the container

version: '3.7'
services:
  web:
    image: nginx:alpine
    ports:
      - "8000:80"
    volumes:
      - ./app:/usr/share/nginx/html

Running docker-compose

• to test this from the project folder run the following command

$ docker-compose up -d

• to view the status of the all the containers used in the app

$ docker-compose ps

other useful commands in docker-compose

• to view the logs of the services in the application

$ docker-compose logs

• to pause the application

$ docker-compose pause

• to unpause the application

$ docker-compose unpause

• to stop the service, this stops all the services container executions

$ docker-compose stop

• to start the services

$ docker-compose start

• to down all the services, this terminates that containers and removes the network but not the volumes

$ docker-compose down

• to list all the images

$ docker-compose images