1.
September 27, 2016
Introduction to Kubernetes
Ross Kukulinski
@RossKukulinski

2.
©2016 NodeSource @RossKukulinski
Welcome
2
Ross Kukulinski
Product Manager @ NodeSource
Node.js Evangelism WG
Introduction to CoreOS - O’Reilly Media

3.
©2016 NodeSource @RossKukulinski3
Welcome
Today’s Roadmap
• Container Orchestration
• Kubernetes 101
• DEMO FOR THE DEMO GODS

4.
©2016 NodeSource @RossKukulinski4

5.
©2016 NodeSource @RossKukulinski
Container Orchestration
5

6.
©2016 NodeSource @RossKukulinski6
If your architecture looks like this
Manage your containers
with Ansible, Docker
Swarm, ECS, etc.

7.
©2016 NodeSource @RossKukulinski7
If your architecture looks like this
You need orchestration help

8.
©2016 NodeSource @RossKukulinski8
Orchestration Overview
Container Orchestration
• Schedule containers to physical machines
• Restart containers if they stop
• Provide private container network
• Scale up and down
• Service discovery

9.
©2016 NodeSource @RossKukulinski
Kubernetes 101
9

10.
©2016 NodeSource @RossKukulinski
Kubernetes is an open
source system for
automating deployment,
scaling, and management of
containerized applications
Kubernetes 101
10

11.
©2016 NodeSource @RossKukulinski11
Kubernetes 101
Kubernetes Orchestration
• Schedules containers to physical machines
• Service discovery & load balancing
• Horizontal application scaling
• Automated rollouts & rollbacks
• Secret and configuration management
• Storage orchestration
• … and a whole lot more!

12.
©2016 NodeSource @RossKukulinski
Kubernetes Nomenclature
12

13.
©2016 NodeSource @RossKukulinski13
Kubernetes 101
Terminology - Nodes
• Is a worker machine in Kubernetes
• Node may be a VM or a physical machine
• Each Node has the services necessary to run Pods

14.
©2016 NodeSource @RossKukulinski14
Kubernetes 101
Terminology - Pods
• Smallest deployable units of computing
• Group of one or more containers
• Containers within Pod share a cluster-accessible IP
address (and localhost)
• Containers within a Pod have access to shared
volumes

15.
©2016 NodeSource @RossKukulinski15
Kubernetes 101
Terminology - Replica Sets
• Ensures that a specified number of Pod “replicas”
are running at one time
• If there are too many, it will kill some Pods
• If there are too few, it will start more

16.
©2016 NodeSource @RossKukulinski16
Kubernetes 101
Terminology - Deployments
• Provides declarative updates for Pods/Replica Sets
• Manages one or more Replica Sets
• Primary mechanism for interacting with Pods!
• Automated rollouts and rollbacks :)

17.
©2016 NodeSource @RossKukulinski17
Kubernetes 101
Terminology - Services
• An abstraction which defines a logical set of Pods
• Provides a mechanism for accessing them
• 3 Types: ClusterIP, NodePort, LoadBalancer

18.
©2016 NodeSource @RossKukulinski
Let’s play with Kubernetes
right now!
18

19.
©2016 NodeSource @RossKukulinski
github.com/rosskukulinski/docker-philly
19

20.
Thank you.
Ross Kukulinski
ross@nodesource.com
@RossKukulinski