Follow along : slides.com/shrikrishna/docker/live
Source: docker.io
Docker
- Application Sandbox
- Cross Platform
- Lightweight
- Intuitive
Source: xkcd.com/1168
Goals
- Abstract infrastructure
- Reduce conflict between sysadmins and developers
Source: xkcd.com/705
Ecosystem
- Docker Daemon
- Docker Client
- Docker Hub / Registry
- Docker Images
- Docker Containers
- Dockerfile
- Compose
- Swarm
Source: xkcd.com/1636
Versus
Layers
- Copy-on-write filesystem
- Multiple read-only layers
- Shared between running containers
- Ephemeral layer at the top
Rails App Container
Docker Commands
Source: xkcd.com/196
Cheatsheet Yo!
- run
- ps
- inspect
- top
- diff
- images
- commit
- history
- push
- events
Dockerfile
- Description Language for building Docker images
- Akin to Makefile/Vagrantfile
- Caching
Compose
- YML Spec
- App as a collection of Services
- Automation
Source: xkcd.com/1319
Networking
- SDN - Software Defined Networking
- Single Host / Bridge
- Multi Host / Overlay
Overlay Network
Service Discovery
- In single host - overwriting /etc/hosts vs DNS
- Multi host - using Consul / etcd
- Multi host - using DNS
Etcd cluster
Source: coreos.com
Micro Services
Text
Source: microservices.io
Obligatory Shameless Plug
- Author of "Orchestrating Docker"
- Authoring of "Mastering Docker"
- bit.ly/1KR5ALG
- Twitter: @srikrishnaholla
