Docker

Question 1

command to build a docker image

Answer 1

docker build -t friendlyhello (image name)

Question 2

run docker image and map port 80 from within the container to 4000

Answer 2

docker run -p 4000:80 friendlyhello

Question 3

docker run the image in background )giving back the command prompt) plus map the port 80 from within the container to port 4000 outside.

Answer 3

docker run -p -d 4000:80 frendlyhello

Question 4

list all running docker containers

Answer 4

docker container ls (old style docker ps)

Question 5

list all containers even those not running

Answer 5

docker container ls -a

Question 6

gracefully stop a container

Answer 6

docker stop container ID

Question 7

forcefully shutdown a container

Answer 7

docker container kill

Question 8

remove a specified container from this machine

Answer 8

docker container rm

Question 9

list all images on this machine

Answer 9

docker image ls

Question 10

remove a specified image from this machine

Answer 10

docker image rm

Question 11

create a tag for an image docker

Answer 11

docker tag username/repository:tag

Question 12

push the tagged image to the registry

Answer 12

docker push username/repository:tag

Question 13

run the tagged image from the repo

Answer 13

docker run username/repository:tag

Question 14

run a service consisting of multiple containers (tasks)

Answer 14

docker stack deploy -c docker-compose.yml appName

Question 15

take down the app/ service

Answer 15

docker stack rm appName

Question 16

take down the swarm

Answer 16

docker swarm leave –force

Question 17

start a container? Is state preserved from the previous session?

Answer 17

docker start ContainerID