[openstack days korea 2016] track4 - openstack with kubernetes
TRANSCRIPT
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OPENSTACK WITH KUBERNETES
Openstack Days korea2016.2.18
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Agenda§ Kubernetes 소개§ Virtualization과 container 차이§ Kubernetes Architecture§ Openstack Nova-docker§ Openstack Murano§ Openstack Magnum
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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
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First Cluster at Google
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And the First rack
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Now
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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
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• 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
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Container
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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
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Pod
/data
python 3.4.2glibc 2.21
MyService
python 2.7.9glibc 2.19
MySQL
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Kubernetes Building Blocks
Service• Replicated pods• Auto-restart member pods• Abstract name(DNS)• IP address for the service• Load Balancing among replicas
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LoadBalancer
Service IP
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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
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• Application 이 최소한의 micro service 단위로 구현되어 있어야함
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Kubernetes is not Magic
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Kubernetes Architecture
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Minion NodeMinion Node
Minion Node
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Kubernetes Architecture
Kubectl (User command)
Master Node
Scheduler
Minion Node
Kubelet Kube-proxy
Docker
REST API
Internet
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Openstack Architecture
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Kubernetes Architecture
Docker
Host NIC
pod
Docker
FlanneldVXLAN Overlayservice cluster IP
pod pod
Docker
Host NIC
pod
Host NIC
FlanneldFlanneld
pod
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Openstack Nova-Docker
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Openstack Murano
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Openstack Magnum
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Q & A
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