Is that a Vagrant in your Computer?

Install
Download configuration file (i.e. Vagrantfile).
Manual download or quickstart via command line
vagrant init hashicorp/precise32
Start the box
vagrant up
Environment set up perfectly and ready to go

Where does the Vagrant environment live?

Depends on the provider
Typically Virtual Machines: VirtualBox, VMWare
But many more including AWS

Vagrant Terminology

Boxes:
- base operating system image to create the Vagrant environment from (e.g. .iso file to install an OS)
Vagrantfile:
- configuration file that creates a Vagrant Environment from a Box
Vagrant Environment:
- the actual running instance of a environment built from a Box via a Vagrantfile
Providers:
- where the Vagrant Environment actually runs
- specified in the Vagrantfile

Vagrantfile

configuration file

Box: base OS image to create environment from
Environment settings: Name, memory usage
Networking: Port forward to be accessible from host
Synced Folders: by default /vagrant in the Vagrant environment is linked to host machine's filesystem where the Vagrantfile is
Provisioning: install your tech stack

Vagrantfile

sample

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   config.vm.box = "hashicorp/precise32"
   config.vm.hostname = "GDGBNdevfest2014"
   config.vm.network "forwarded_port", guest: 80, host: 8000
   config.vm.network "forwarded_port", guest: 8080, host: 8080
   config.vm.network "private_network", ip: "192.168.10.19"
   config.vm.synced_folder "www", "/var/www"
   config.vm.synced_folder "var_cache_apt", "/var/cache/apt/"
   config.vm.provision "shell", :path => "setup.sh"
 end

Vagrant Commands

Initialize Vagrantfile from vagrantcloud.com
vagrant init hashicorp/precise32
Start Machine
vagrant up
Suspend Machine (your files are safe)
vagrant halt
Nuke it all!
vagrant destroy
SSH into its heart (Windows may need Putty)
vagrant ssh

Vagrant Commands

Provision, we must (runs first time with vagrant up)
vagrant provision
Box Managment
vagrant box
- All locally downloaded boxes
  vagrant box list

Vagrant Cloud

vagrantcloud.com

Search / Download existing boxes
Share your boxes

Problems

It's never just a walk in the clouds

Corrupted boxes:
- Need to manually delete locally downloaded box
Shared folder not set up: Google Bing it
Incompatible Vagrant and VirtualBox:
- Update to latest else slowly downgrade VirtualBox
git cloning UNIX vs Windows line endings:
- dos2unix
- git config --global core.autocrlf input
Possibly time consuming and painful to setup

And that's Vagrant in a nutshell

Hopefully....

But wait, there's more!

Computer Whaling

Using Docker to set up your environment

Docker

docker.io

Open platform for developers and sysadmins to build, ship, and run distributed applications.
Portable and lightweight (FAST!)
Focused more on deployment and production
Development solutions exist such as Fig

Docker Terminology

Understanding Docker

Images: (build component)
- Read-only template to create containers from
- Similar to Vagrant Boxes
Registries: (distribution component)
- Storage of images
- Public Docker Hub or Private Docker Registry
Containers: (run component)
- Seen has processes on your computer
- Once it finished, it will close
Dockerfile:
- a configuration file to build Docker Images

Docker Commands (1)

Search for a docker image
docker search *search string*
Download image locally
docker pull user/imagename:tag
Run commands in Container
docker run user/imagename
command_to_run arguments_to_command
Get bash shell in Container
docker run -t -i user/imagename /bin/bash

Docker Commands (2)

Save changes
docker commit container_id
  -m="message for the commit"
  -a="name of author"
  user/imagename:tag
Listing containers

docker ps -l # Last Running

docker ps # Currently running

docker ps -a # All
Stop Container
docker stop container_id_or_name
List all downloaded Images
docker images

Docker Commands (3)

Inspect
docker inspect container_name_or_id
Deleting

docker rm container_name_or_id

docker rmi image_name_or_id
Build image from a Dockerfile
# in folder containing Dockerfile

docker build -t image_name .

Dockerfile

FROM user/imagename:tag (specify base image)
RUN echo "Run install commands e.g. apt-get install"
WORKDIR /default/path/for/all/things
CMD default action to take when running container
ENTRYPOINT enables whole container to runs as if it was an executable
EXPOSE Port#1 Port#2

Mapping ports

Ports of services in container to be exposed to the host machine
Auto mapped
docker run
-P training/webapp python app.py
Manually mapped
docker run
  -p hostPort:ContainerPort
  -p 8080:80
  training/webapp python app.py
See port mapping
docker port container_id

Working Directory

Specify where to start any RUN , CMD or ENTRYPOINT

docker run
  -p 8080:8080 -p 35729:35729
  -w "/slides/presentation-tabs/"
  devfest/node
  gulp serve

Linking containers

For interaction between containers
Name a container and reference it

docker run --name db training/postgres

docker run -P --name web --link db:thedb
training/webapp python app.py

docker run --name web --link db:thedb
training/webapp cat /etc/hosts

172.17.0.32 thedb
the 'db' container must have necessary ports EXPOSEd from the originating Dockerfile

Managing Data in Containers

1. Data Volumes

Persist until no containers use them (non host file mounts)
Changes not included when you update an image
Examples:
- Create a /webapp folder in the container
  docker run -d -P --name web -v /webapp
  training/webapp python app.py
- Mount host file system in the container

Managing Data in Containers

2. Data Volume Containers

Containers that act solely as a data volume
Creation
docker run -d -v /dbdata --name dbdata
training/postgres echo Data-only container
Usage
docker run -d --volumes-from dbdata
--name db1 training/postgres

docker run -d --volumes-from dbdata
--name db2 training/postgres

Findings

Docker is more complicated as whole
Docker provision is easier
Allows quicker testing and experimentation
You can work with same container that will be pushed to production
Much smaller footprint in terms of CPU and Disk Space used
It's all the rage now

Is that a Vagrant in your Computer?

Using Vagrant to set up your environment

Slides & Examples:

Introduction

Timothy Lim

Let's start development!

In Theory

Let's start development!

In Reality

Vagrant

Create and configure reproducible & portable development environments

Where does the Vagrant environment live?

Vagrant Terminology

Vagrantfile

configuration file

Vagrantfile

sample

Vagrant Commands

Vagrant Commands

Vagrant Cloud

Problems

It's never just a walk in the clouds

And that's Vagrant in a nutshell

Hopefully....

But wait, there's more!

Computer Whaling

Using Docker to set up your environment

Docker

Docker Terminology

Docker Commands (1)

Docker Commands (2)

Docker Commands (3)

Dockerfile

Mapping ports

Working Directory

Linking containers

Managing Data in Containers

1. Data Volumes

Managing Data in Containers

2. Data Volume Containers

Findings

In conclusion

Dock all the things!

Acknowledgements & Links

The End

Thanks for your time and enjoy the rest of the event!