OPENSTACK WITH KUBERNETES

Openstack Days korea2016.2.18

Agenda§ Kubernetes 소개§ Virtualization과 container 차이§ Kubernetes Architecture§ Openstack Nova-docker§ Openstack Murano§ Openstack Magnum

Kubernetes

• open-source system for managing containerized applications across multiple hosts in a cluster

• Controll Docker and Rocket containers

• Builed Go Language • 구글의 서버 관리 운영 노하우를

opensource로 공개됨

First Cluster at Google

4

And the First rack

5

Now

6

7

Virtualization Vs Container

HardWare

HostOS

Hypervisor

GuestOS

GuestOS

GuestOS

Bin/Lib

Bin/Lib

Bin/Lib

APP APP APP

HardWare

HostOS

Bin/Lib

Bin/Lib

Bin/Lib

APP APP APP

• Linux container 가 동작하는 곳은 어디든 동일하게 동작• Application 동작에 필요한 최소한의 binary와 libray 만 가상화 함으로써 최소

한의 overhead• 한번 설정으로 모든 어플리케이션을 배포 할 수 있음• 한번 설정으로 Log ,remote access, network configuration, resource

monitoring이 가능• 별도의 설정없이 개발환경과 동일한 환경으로 운영 가능• 기존 서비스 환경을 중단시키지 않으면서 새로운 어플리케이션 배포 가능

8

Container

Kubernetes Building Blocks

Container• Handle package dependenceies• Diffrenet version same machine• NO DLL HELL

PODS• Co-locate containers• Shared volumes• IP address independent port space• Unit of deploymenet, migration

9

Pod

/data

python 3.4.2glibc 2.21

MyService

python 2.7.9glibc 2.19

MySQL

Kubernetes Building Blocks

Service• Replicated pods• Auto-restart member pods• Abstract name(DNS)• IP address for the service• Load Balancing among replicas

10

LoadBalancer

Service IP

11

Rolling upgrade for Kubernetees

frontend

v1.2

frontend

v1.2

frontend

v1.2

LoadBalancer

Pods:

Labels:frontend

v1.3

frontend

v1.3

frontend

v1.3

• Application 이 최소한의 micro service 단위로 구현되어 있어야함

12

Kubernetes is not Magic

13

Kubernetes Architecture

Minion NodeMinion Node

Minion Node

14

Kubernetes Architecture

Kubectl (User command)

Master Node

Scheduler

Minion Node

Kubelet Kube-proxy

Docker

REST API

Internet

15

Openstack Architecture

16

Kubernetes Architecture

Docker

Host NIC

pod

Docker

FlanneldVXLAN Overlayservice cluster IP

pod pod

Docker

Host NIC

pod

Host NIC

FlanneldFlanneld

pod

17

Openstack Nova-Docker

18

Openstack Murano

19

Openstack Magnum

Q & A

20

감사합니다jkpark@rockplace.co.kr

070-7603-3401