Lab #8: images Command
The docker-compose images command help to listout images used/created by the containers.
Pre-requisite:
Tested Infrastructure
| Platform | Number of Instance | Reading Time |
|---|---|---|
| Play with Docker | 1 | 5 min |
Pre-requisite
- Create an account with DockerHub
- Open PWD Platform on your browser
- Click on Add New Instance on the left side of the screen to bring up Alpine OS instance on the right side
Assignment
- Create a docker-compose.yml with custom image
- Build container and network
- Bringup the containers
- List out the images used by the containers
Create a docker-compose.yml with custom image
Setup environment
$ mkdir -p docker-compose/build $ cd docker-compose/build Now lets create the Dockerfile
FROM nginx:alpine RUN echo "Welcome to Docker Workshop!" >/usr/share/nginx/html/index.html CMD ["nginx", "-g", "daemon off;"] Create a docker-compose.yml file
version: "3.7" services: webserver: build: context: . dockerfile: Dockerfile image: webapp:v1 container_name: Nginx ports: - "80:80" dbserver: image: mysql:5.7 container_name: Mysqldb restart: unless-stopped ports: - "3306:3306" environment: MYSQL_ROOT_PASSWORD: Pa$$w0rd MYSQL_USER: test MYSQL_PASSWORD: Pa$$w0rd123 MYSQL_DATABASE: test volumes: - db_data:/var/lib/mysql volumes: db_data: Bringup the containers
$ docker-compose up -d NOTE: This will build the images and bringup the containers. -d option which will run the container in background.
List out the images used by the containers
$ docker-compose images Container Repository Tag Image Id Size ----------------------------------------------------- Mysqldb mysql 5.7 383867b75fd2 356 MB Nginx webapp v1 3454fa918c0d 20.2 MB mysql is the one used for dbserver and webapp:v1 is the custome image used for webserver.
Contributor
Next ยป Lab #9: ps Command