rankinjl / vagrant-docker-python-ubuntu

Set up a Redis database server inside a Docker container using Python and Vagrant on an Ubuntu VM.

vagrant-docker-python-ubuntu

Set up a Redis database server inside a Docker container using Python and Vagrant on an Ubuntu VM created with VirtualBox and Vagrant.

Edited by Jessica Rankins on 6/15/2017

GOALS:

• Use Vagrant and Docker to configure a Docker container in a Vagrantfile on a linux machine (Ubuntu)
• Demonstrate Infrastructure as code principles (script configures and provisions environments to ensure environment parity)
• Networking: Forwarded ports to host from VM from database container: 80 to 8080 to 8080 for Redis demonstration via Python on Linux

PREREQUISITES: ON WINDOWS HOST COMPUTER, HAD TO:

• Install VirtualBox (any version should work)
• Install Git for Windows (version 2.12.2.windows.1)
• Install Vagrant (version 1.9.4)

TO EXECUTE:

• cd to directory with Vagrantfile for Ubuntu VM (this directory)

• make sure you have a "Docker" folder with a pythonFiles folder with app.py and requirements.txt, Dockerfile, Vagrantfile for container

• vagrant up to create Ubuntu VM

• after successful vagrant up, vagrant ssh into Ubuntu VirtualBox VM

  • cd /vagrant/Docker
  • vagrant up to create Redis container using Python

• See example Redis web page in Windows host browser at 127.0.0.1:8080

• When done, vagrant destroy in /vagrant/Docker to get rid of container

• exit from vagrant ssh

• vagrant destroy to get rid of Ubuntu VM

SOME USEFUL COMMAND LINE COMMANDS:

• vagrant up [--provider=docker] to create/start the container corresponding to the Vagrantfile in the current directory [by using Docker as the provider and not VirtualBox if it does not detect it]
• vagrant docker-exec [VMname] -- command_to_execute to run a one-off command against a Docker container by containername (error if container not running)
• vagrant docker-logs to see the logs of a running container
• vagrant reload [--provision] to reload container to include new Vagrantfile commands [and reload provisions]
• vagrant destroy to shut down and deallocate resources corresponding to container in this directory
• vagrant ssh to start ssh session into container in this directory (end by typing "logout"); Uses Git, private key provided by Vagrant (Ubuntu VM supports ssh, but container does not)

EXECUTION OF VAGRANTFILE COMMANDS:

• "name" in "config.vm.define 'name' do |n|" is the same as the "config" variable.
• Commands placed inside the "config.vm.define 'name' do |n|" are applied only to the defined container (name).
• Commands placed outside this command are done to all containers.
• Commands are executed outside-in, in the order listed in the Vagrantfile.