Docker - Basics

Question 1

CLI run a conatiner

Answer 1

docker run -dp tag-of-the-image

Question 2

-d flag in run command

Answer 2

run the container in detached mode (in the background)

Question 3

-p flag in run command

Answer 3

maps the hosts port to the containers port (3000:3000)

Question 4

CLI to build a container image

Answer 4

docker build -t name(tag)-for-the-image

Question 5

-t flag in build command

Answer 5

adds a tag or text name/label to reference the image

Question 6

CLI list container ids

Answer 6

docker ps

Question 7

Needed to run a build

Answer 7

Dockerfile in the root dir of the project, no extension

Question 8

CLI to stop an image

Answer 8

docker stop image-id

Question 9

CLI remove an image

Answer 9

docker rm

Question 10

CLI stop and remove an image

Answer 10

docker rm -f

Question 11

CLI create a named volume

Answer 11

docker volume create name-of-volume

Question 12

CLI map volume to container with build

Answer 12

docker build -td port:port -v named-of-volume:/dir/location tag-of-container

Question 13

CLI view the mountpoint of the volume

Answer 13

docker volume inspect name-of-volume

Question 14

CLI view volume logs

Answer 14

docker logs -f volume-id

Question 15

CLI start a dev-mode container

Answer 15

docker run -dp hostPort:conatinerPort -w working-directory -v bindmount-host-dir:container-dir image-to-use sh -c ‘command-to-run’

Question 16

CLI start app with compose file

Answer 16

docker-compose up -d

Question 17

CLI stop compose app

Answer 17

docker-compose down

Question 18

CLI view compose logs

Answer 18

docker-compose logs -f

Question 19

CLI stop application and remove volumes, images, and orphans with compose file

Answer 19

docker-compose down –rim all -v –remove-orphans

Question 20

CLI execute a command in a container

Answer 20

docker exec -it name_of_container command

bash as command to get shell

-it flag is for interactive and pseudo TTY