lucassha/docker

docker-notes

Dockerfile

docker

general notes on how to use docker

Going to just assume I'm using an ubuntu image or container the entire time

Pull an image

docker pull ubuntu

Run an image and log into the shell. -i makes it interactive. -t allocates a psuedo tty.

docker run -it ubuntu bash

Run an image but do not log into the shell

docker run -itd ubuntu bash

Show current active containers

docker ps

Show all containers

docker ps -a

For examples below, my container's name is `silly_mcnulty`

Show information about the container in json format. use grep to find specific fields.

docker inspect silly_mcnulty

Log into the container's shell that is already running

docker attach silly_mcnulty

Stop the container

docker stop silly_mcnulty

Restart a container (using docker ps -a to show the non running container)

docker restart silly_mcnulty

Create an image with preconfigured settings from an already created instance (i.e. - you installed apache2 and want to always launch a container with it already running)

docker commit -m 'apache2 installed and running' -a lucassha silly_mcnulty ubunapache:v1

-m for the message. -a for the username. last portion is the name of the new image.

Create a port passthrough during bootup of an image. Use elinks to check it's functional.

docker run -dp 2345:80 nginx