Docker Run

Basic usage

  • Check hostname

  • Check PS1 (bash prompt)

  • Will pull automatically

  • Will close immediately after executing command

$ docker run bash

$ docker run bash echo 'hello'
hello

Interactive mode

  • -t, --tty - Allocate a pseudo-TTY

  • -i, --interactive - Keep STDIN open even if not attached

  • -it - implies both -i and -t

  • ctrl+p + ctrl+q - quit container without stopping it

  • ctrl + d - exits and stops the container

$ docker run -it bash

$ docker run -it alpine sh

Detach

  • -d, --detach - Run container in background and print container ID

$ docker run -d -it alpine sh
b7583714a497ac10fcfa2f514025dc271a9e0d4540684f26f115d5a98b2f87b7

$ docker run --detach -it alpine sh
09f99d54cba4162ebea238766d366fe09ad831ca9cc844c1b54f3151dd8aec3b

Attach

  • Attach to local standard input, output, and error streams of main process

  • ctrl + p + q - quit container without stopping it

$ docker attach CONTAINER_NAME_OR_ID

Show running

$ docker ps
CONTAINER ID        IMAGE     COMMAND      CREATED              STATUS              PORTS   NAMES
09f99d54cba4        alpine    "sh"         About a minute ago   Up About a minute           serene_kare
b7583714a497        alpine    "sh"         About a minute ago   Up About a minute           cocky_curie

Show all containers

  • even not running

$ docker ps -a
CONTAINER ID        IMAGE     COMMAND      CREATED              STATUS              PORTS   NAMES
09f99d54cba4        alpine    "sh"         About a minute ago   Up About a minute           serene_kare
b7583714a497        alpine    "sh"         About a minute ago   Up About a minute           cocky_curie

Name

  • --name - Assign a name to the container

$ docker run -d --name sleeper alpine sleep 50
b9e2e75cb7727cc43c6daff677b69d2fcae9077717c069190ab7bb3329339c4a

$ docker ps
CONTAINER ID        IMAGE     COMMAND      CREATED              STATUS              PORTS   NAMES
b9e2e75cb772        alpine    "sleep 50"   5 seconds ago        Up 4 seconds                sleeper
09f99d54cba4        alpine    "sh"         About a minute ago   Up About a minute           serene_kare
b7583714a497        alpine    "sh"         About a minute ago   Up About a minute           cocky_curie

Limiting resources

Assignments

  1. Wyświetl Ehlo World! z wnętrza kontenera alpine

  2. Wyświetl listę działających i zakończonych kontenerów

  3. Podaj rozmiar obrazu nginx

  4. Podaj rozmiar kontenera stworzonego na podstawie obrazu nginx