Network isolation between services in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new Docker network named 'isolated_net'.

Docker

docker network create [1]

Drag options to blanks, or click blank then click option'

Aisolated_net

Bbridge

Chost

Dnone

Attempts:

3 left

💡 Hint

Common Mistakes

Using default network drivers like 'bridge' instead of a custom name.

Confusing network driver names with network names.

The command docker network create isolated_net creates a new isolated network named 'isolated_net'.

2fill in blank

medium

Complete the command to run a container named 'webapp' connected to the 'isolated_net' network.

Docker

docker run -d --name webapp --network [1] nginx

Drag options to blanks, or click blank then click option'

Aisolated_net

Bnone

Chost

Dbridge

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'bridge' network instead of the custom 'isolated_net'.

Omitting the --network option.

The --network isolated_net option connects the container to the isolated network.

3fill in blank

hard

Fix the error in the command to disconnect a container named 'db' from the 'isolated_net' network.

Docker

docker network [1] isolated_net db

Drag options to blanks, or click blank then click option'

Aremove

Bdisconnect

Cconnect

Ddelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'connect' instead of 'disconnect'.

Using 'remove' or 'delete' which are invalid for this command.

The correct command to disconnect a container from a network is docker network disconnect.

4fill in blank

hard

Fill both blanks to create a Docker Compose service named 'api' that uses the 'isolated_net' network and exposes port 5000.

Docker

services:
  api:
    image: myapi
    ports:
      - "[1]:5000"
    networks:
      - [2]

networks:
  isolated_net:
    driver: bridge

Drag options to blanks, or click blank then click option'

A5000

Bisolated_net

C80

Ddefault

Attempts:

3 left

💡 Hint

Common Mistakes

Using container port instead of host port in ports mapping.

Using 'default' network instead of 'isolated_net'.

Port mapping uses the host port 5000 to map to container port 5000. The network name is 'isolated_net' to ensure isolation.

5fill in blank

hard

Fill all three blanks to define a Docker Compose file with two services 'frontend' and 'backend' isolated on 'isolated_net' network, where 'frontend' depends on 'backend'.

Docker

services:
  frontend:
    image: myfrontend
    depends_on:
      - [1]
    networks:
      - [2]
  backend:
    image: mybackend
    networks:
      - [3]

networks:
  isolated_net:
    driver: bridge

Drag options to blanks, or click blank then click option'

Abackend

Bfrontend

Cisolated_net

Ddefault

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping 'frontend' and 'backend' in depends_on.

Using 'default' network instead of 'isolated_net'.

'frontend' depends on 'backend', and both services use the 'isolated_net' network for isolation.