Docker

Docker First Steps

Installation

apt-get install -y apt-transport-https ca-certificates surl software-properties-common

If needed import the docker repo
apt-get update

Install Docker
apt-get install docker-ce

Useful commands

Information

docker info

Check Version of client and server

docker version

Search images (usually from hub.docker.com)

docker search image

Get images you want to run

docker pull image

Show the images
docker image

Run an image in a container
docker run image

Stop the container
docker stop image

Start the container
docker stop image

Remove the image
docker rm image

Interaction with the Container

Open the bash shell
docker exec -it image /bin bash

Hello world example

Search images
docker search image

Run Hello World (Shows a Hello World message on the commandline)
docker pull hello-world docker run hello-world

Stop Hello World
docker stop hello-world

Get rid of it
docker rm hello-world

HTTPD Example

Run httpd webserver
docker pull httpd docker run httpd

Run http and expose it to the outside world (-p container:host)
docker run -p 80:80 --name web01 -d httpd

Show running containers
docker ps

Get stuff from the webserver
curl localhost

Stop the container
docker stop web01

Remove the container
docker rm web01

Docker Adding Persistance Storage

This provides the local data to run in the container, for instance the data for the website

Expose a folder to the container method 1
docker volume create data

docker run -v /var/www/html:/var/www/ httpd

Or doing use method 2
docker run -d v /var/www/html:/var/www/ httpd

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