Containers

Let's play with basics containers commands

Running interactive container

$ docker run -it alpine sh

Running a daemon container

$ docker run -d nginx:alpine
d1dc44ce216d097a4892489908fd4888bcb3cbeb009b50eac0df2a9577c53ba6

Listing containers

$ docker ps
CONTAINER ID  IMAGE          COMMAND    CREATED  STATUS  PORTS   NAMES
d1dc44ce216d  nginx:alpine   "nginx -"  3 s ago  Up 3 s  80/tcp  stoic_pike

$ docker ps -a
CONTAINER ID  IMAGE          COMMAND    CREATED  STATUS  PORTS   NAMES
d1dc44ce216d  nginx:alpine   "nginx -"  3 s ago  Up 3 s  80/tcp  stoic_pike
e3b97eaa0c87  alpine:latest  "sh"       2 h ago  Exited          evil_stallman

Remove a container

$ docker rm evil_stallman

Stopping a running container

$ docker stop stoic_pike
$ stoic_pike
$ docker ps
CONTAINER ID  IMAGE          COMMAND    CREATED  STATUS  PORTS   NAMES
$

Start a container

$ docker start stoic_pike
$ stoic_pike
$ docker ps
CONTAINER ID  IMAGE          COMMAND    CREATED  STATUS  PORTS   NAMES
d1dc44ce216d  nginx:alpine   "nginx -"  3 s ago  Up 3 s  80/tcp  stoic_pike
$

Connect to a running container

$ docker exec -it stoic_pike sh
/ #

Define a Docker container

A Docker container holds everything that is needed for an application to run. Each container is created from a Docker image. Docker containers can be run, started, stopped, moved, and deleted. Each container is an isolated application platform.