Introduction to Kubernetes

September 27, 2016

Introduction to KubernetesRoss Kukulinski

@RossKukulinski

©2016 NodeSource @RossKukulinski

Welcome

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Ross Kukulinski

Product Manager @ NodeSource

Node.js Evangelism WG

Introduction to CoreOS - O’Reilly Media

©2016 NodeSource @RossKukulinski3

Welcome

Today’s Roadmap • Container Orchestration

• Kubernetes 101

• DEMO FOR THE DEMO GODS


Container Orchestration

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If your architecture looks like this

Manage your containers with Ansible, Docker Swarm, ECS, etc.


If your architecture looks like this

You need orchestration help


Orchestration Overview

Container Orchestration • Schedule containers to physical machines

• Restart containers if they stop

• Provide private container network

• Scale up and down

• Service discovery


Kubernetes 101

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Kubernetes is an open source system for

automating deployment, scaling, and management of containerized applications

Kubernetes 101

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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!


Kubernetes Nomenclature

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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


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


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


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 :)


Kubernetes 101

Terminology - Services • An abstraction which defines a logical set of Pods

• Provides a mechanism for accessing them

• 3 Types: ClusterIP, NodePort, LoadBalancer


Let’s play with Kubernetes right now!

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github.com/rosskukulinski/docker-philly

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http://github.com/rosskukulinski/docker-philly

Thank you.Ross Kukulinski

[email protected]@RossKukulinski

mailto:[email protected]

Introduction to Kubernetes

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