Entering Docker Container with docker exec

16 October 2014 on Cloud, Docker

Today Docker Version 1.3 is was released and is avalable in repositories.

$docker info
Containers: 63
Images: 356
Storage Driver: aufs
 Root Dir: /var/lib/docker/aufs
 Dirs: 482
 Execution Driver: native-0.2
Kernel Version: 3.1.0-1-amd64
Operating System: Debian GNU/Linux 7 (wheezy)

It introduces new command exec. It makes tools like nsinit and nsenter obsolete. Entering running container becomes possible with Docker itself and i like this very, very much. Docker's exec command allows to execute additional process within the container, e.g.

docker exec myContainer -it bash

Example above attaches to running container "myContainer".
Another new interesting command is docker create

docker create  
#creates container out of image like docker run, but without running it. So
docker run some/image

it is the same like

$CONTAINER_ID=$(docker create -t -i ubuntu bash)
docker start -a -i $CONTAINER_ID

Have fun!

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Entering Docker Container with docker exec