Architecture Overview

Question 1

The Docker daemon handles:

Answer 1

. Building
. Running
. Distributing

Question 2

What type of architecture id Docker:

Answer 2

Client-server

Question 3

Client talks to the:

Answer 3

Docker daemon

Question 4

Both communicate using a REST API:

Answer 4

. UNIX sockets

. Network interface

Question 5

Docker daemon:

Answer 5

dockerd

Question 6

Docker daemon listens for Docker API requests and manages Docker objects:

Answer 6

. Images
. Containers
. Networks
. Volumes

Question 7

Docker client:

Answer 7

docker

Question 8

How users interact with Docker:

Answer 8

Docker client (docker)

Question 9

Sends commands to dockerd:

Answer 9

Docker client (docker)

Question 10

Docker registries:

Answer 10

. Stores Docker images
. Public registry such as DockerHub
. Let you run your own private registry

Question 11

Docker objects:

Answer 11

. Images
. Containers
. Services

Question 12

Images:

Answer 12

. Read-only template with instructions for creating a Docker container.
. Image is based on another image
. Create your own images
. Use images published to a registry
. Use a Dockerfile to build images

Question 13

Containers:

Answer 13

. Runnable instance of an image
. Connect a container to networks
. Attach storage
. Create a new image based on its current state
. Isolated from other containers and the host machine

Question 14

Services

Answer 14

. Scale containers across multiple Docker daemons
. Docker Swarm
. Define the desired state
. Service is load-balanced

Question 15

Docker Swarm:

Answer 15

. Multiple Docker daemons (Master and Workers)
. The daemons all communicate using the Docker API
. Supported in Docker 1.12 and higher