Docker Compose Basic

Introduction

In this lab, you’ll first deploy an application by setting up network, multiple containers individually. Then you will clean up resources, and deploy the same application using Docker Compose.

Task 1: Create a Bridge Network

Create a bridge network named clicknet.

docker network create --driver bridge clicknet

Verify

$ docker network ls
NETWORK ID     NAME       DRIVER    SCOPE
5aa54ade2dcc   bridge     bridge    local
fc40bfcbce91   clicknet   bridge    local
238b23f4e2a9   host       host      local
59b9cbf97489   none       null      local

Task 2: Run a Redis Container

Create a background container named redis using the redis:alpine image and attach it to the clicknet network.

docker run -d \
  --name redis \
  --network clicknet \
  redis:alpine

Task 3: Run the Click Counter App

Create a container named clickcounter using the kodekloud/click-counter image, attach it to clicknet, and publish the application’s port (5000) on host port 8085.

docker run -d \
  --name clickcounter \
  --network clicknet \
  -p 8085:5000 \
  kodekloud/click-counter

Task 4: Clean Up

Remove the containers and network.

docker rm -f redis clickcounter

docker network rm clicknet

Task 5: Deploy with Docker Compose

Create a compose.yaml file in clickcounter with the following services:

• redis

  • Image: redis:alpine

• clickcounter

  • Image: kodekloud/click-counter
  • The application listens on port 5000.
  • Expose it on host port 8085.

Solution

services:
  redis:
    image: redis:alpine
  clickcounter:
    image: kodekloud/click-counter
    ports:
    - 8085:5000
    depends_on:
    - redis

Start the stack:

docker compose up -d