Docker

• What are Containers?
• New Docker Beta
• Docker Commands

Docker Facts

• Project started out dotCloud
• Written in Go
• Using Linux Isolation features of namespaces and cgroups 
• Offer services like Docker Hub and Docker Cloud
• Windows 2016 Server is adding Docker

Docker Beta

• Uses hyper-V on Windows
• Use xhyve on Mac OS X
• Remove need for Oracle VirtualBox
• Containers coming to Windows 2016

Docker terms

• Docker Engine
• Docker Machine
• Docker Compose
• Docker Swarm
• Docker Hub
• Docker Cloud

Common Docker Commands

• docker build
• docker run
• docker run -i -t
• docker run -d
• docker attach
• docker ps
• docker ps -a
• docker commit

Docker-Machine

• docker-machine ls
• docker-machine create
• eval "$(docker-machine env default)"
• docker-machine start
• docker-machine stop
• docker-machine kill

Docker Compose

• Organize your containers and services
• docker-compose.yml
• 'docker-compose up' to deploy containers
• Gives an abstraction for deploying multiple services

Docker Swarm

• Combine a pool of Docker hosts into 1
• Can create Clusters
• Uses Docker API
• Discovery Services
• Scheduling

Docker Hub

• A host for containers
• Publish your containers
• Search Public repositories
• Pull down to build containers

Docker Cloud

• Deploy to your own cloud
• Define a node
• Define cluster of nodes of same type
• Cluster Nodes have to by of the same provider
• You can use with AWS, Azure, Digital Ocean or your own hosts

Building Containers

• Start with base image
• Use Dockerfile to define and set up
• Can run and commit, but better to use Dockerfile 
• For Nodejs apps, split the npm install and adding code step into separate steps

Dockerfile

FROM node:6.2.0

RUN mkdir /src
COPY package.json /src
WORKDIR /src 
RUN npm install

ENV foo bar
 
# Add your source files
COPY . /src  
CMD ["npm","start"] 

Dockerfile commands

• FROM specify base container image
• ADD/COPY lets you add files to container
• RUN will let you run a Bash command
• CMD takes an array of commands
• ENV sets up an environment variable
• EXPOSE exposes a port
• USER to set the user
• WORKDIR to set the directory your working dir

Docker Build

bash > docker build -t username/container:version /src

Docker run

bash > docker run -d -p 80:3000 username/container:version

Provision Docker on Azure

bash > docker-machine create --driver azure --azure-subscription-id <subs-id> <machine-name>

Azure Docker tips

• Use new management portal
• Turn off when not using
• Delete storage when not used
• Add ports to firewall that you need
• --azure-open-port

Honorable Mentions

• Kubernetes
• Mesos
• Heroku

Demo

Code

• https://github.com/jaxnode-UG/jaxnodechat
• https://slides.com/davidfekke/dockerazure

Questions

Contact

• David Fekke @ gmail dot com
• Twitter @JaxNode
• Skype: davidfekke