Simple Docker Installation

simple-docker-installation.txt

This is to help familiarise with Docker and how to install, run and delete containers. It doesn't do anything useful beyond that.


Install Docker
- Search for 'Docker for Windows' (https://docs.docker.com/docker-for-windows/install/)
- Install from the downloaded .msi

Check installation:
- in Git Bash (may need to run as an administrator):
   - 'docker -v'
   - 'docker-machine -v'
   - 'docker-compose -v'
   
Create a default machine:
- 'docker-machine create --drive hyperv default'
- if this gets stuck then create a new virtual switch within Hyper-V (detailed below)
- check it has installed ok by typing 'docker ps' & something should appear

Use Hyper-V manager to create a virtual switch (allows the virtual machine access to the wifi):
- click on machine name 'IMT-xxxxx'
- click on 'default'
- click on 'virtual switch manager'
- click on 'DockerNAT'
- choose 'external network'
- choose the wireless from the dropdown
- tick the box underneath
- tick 'apply'

List machines:
- 'docker-machine ls'

Stop machine:
- 'docker-machine stop default'

Find images we have:
- 'docker images'

Pull hello-world image from https://hub.docker.com/
- 'docker pull hello-world'
- private repositories - need to use the registry address as part of the pull

Create a container to run 'hello-world':
- 'docker run -d hello-world'

Check it exists & has run:
- 'docker ps -a' - the '-a' shows all the instances that have run in the past

Show what is currently running:
- 'docker ps' 

Run and keep live:
- 'docker run hello-world'
(A message should appear to show the installation is working)
 
Get ubuntu image
- 'docker run ubuntu bash'
- 'docker ps -a' will show that ubuntu has downloaded


A container is a instance of the image - which can be running or stopped. Many container instances can be run from one image.


Run bash in an ubuntu container:
- 'docker run -it ubuntu bash'
- 'ls'
- 'exit' to return to the command window from ubuntu

Run and keep the container running (example):
- 'docker run -d ubuntu tail -f dev/null'
  - '-d' means run in the background, don't print to this window
  - 'tail -f dev/null' - is an ubuntu command - logs to the window the contents of the file dev/null

list the container ids
- 'docker ps -aq'

Remove all containers in the list
- 'docker rm -vf $(docker ps -aq)'
  - docker remove version force (if running) - takes a list of ids and removes them all

Remove all the images
- 'docker rmi -f $(docker images -aq)'
  - but it wont delete any currently being used by a container