CORDDevelopment

HowtheNewPlatformWillMakeYourLifeBetter

December6,2018

Topics

-  Docker,Kubernetes,Helm-Let’sclearsomeconcepts

-  Developmentworkflow-  Findanissueinthecode-  Fixitandtestit-  DeployitonarunningPOD

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Doyoureallyknow

whatDockeris?

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Docker

...performsoperating-system-levelvirtualization,

alsoknownas"containerization"…

Applicationsarebundledincontainers,togetherwiththeirowntools,librariesand

configurationfiles.

Theycancommunicatewitheachotherthroughwell-definedchannels

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DockerImagevsDockerContainer

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Source Code

Image Container Container

Configuration

docker build ...

docker run ...

Development machine

DockerImages

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Source Code

Image

Container docker build ...

Docker daemon Docker daemon

Production machine

docker run ... ?

DockerRegistry

AcatalogofDockerImages

-  public(availableovertheinternet)

-  private(runningonpremises)

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DockerRegistry

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Source Code

Image

Container

docker build ...

docker run ...

Docker daemon Docker daemon

Docker registry

{ docker tag … }

docker push … docker pull …

Dockerimagenames

{registry}/organization/image:{tag|latest}

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Image

Docker daemon Docker Hub

Private registry

docker push opencord/xos-core:latest

docker tag … 10.90.0.101:30500/...

docker push 10.90.0.101:30500/... docker build -t opencord/xos-

core:latest . 10.90.0.101:30500

Imagestagging

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Git Docker

master latest

branch eg: 1.6 by project

tag 1.6.0

semverisyourfriend!

Kubernetes

…automatingdeployment,scaling,andmanagementof

containerizedapplications...

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Kubernetes

-  Runsincluster-  don’thavetoworryonwhereyourcontainersarerunning

-  Managesmountedfiles-  don’thavetoworryaboutdeploymentspecificconfigurations

-  Handlesthenetworking(L3andabove)-  don’thavetoworryaboutservicetoservicecommunication

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Helm

Thepackagemanagerforkubernetes

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Helm

-  Defineapplicationsascharts

-  Templatizedataandconfigurationfiles

-  Managecontainerlifecycle-  upgrades-  scale

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HelmandKubernetes-ImagesandContainers

containers:

-name:onos

image:"{{.Values.images.onos.repository}}:{{tpl.Values.images.onos.tag.}}"

imagePullPolicy:{{.Values.images.onos.pullPolicy}}

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images:

onos:

repository:'onosproject/onos'

tag:'latest'

pullPolicy:'Always'

ImagePullPolicy:Always

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Container

Docker daemon

Docker registry -  helminstall...

-  helmupgrade...***

-  kubectldeletepod…

Anytimethecontainerrestarttheimageis

pulledfromtheregistry

ImagePullPolicy:Always

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Cons:

-  theimagecanchangeif

theupstreamone

changes(eg:latest)

Pros:

-  youaresureitisalways

gettingthelatest

availableimage

ImagePullPolicy:IfNotPresent

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Container

Docker daemon

Docker registry Anytimethecontainerrestartthe

daemonchecksiftheimagesispresent:

-  ifyesitusesit

-  ifnotitdownloadsit

Is the images already

present in the local

daemon?

ImagePullPolicy:IfNotPresent

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Cons:

-  itwon’tpullanew

versionoftheimage(eg:

latest)

-  canendupwithdifferent

imagesindifferent

nodes**

Pros:

-  faster

-  doesn’tdownloadnewer

image

-  easiertoupdatean

imagefordev*

AlwaysVSIfNotPresent:Whentousewhat

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Development Production / Trial

Single Node

Cluster

IfNotPresent Always

Always Always

Let’spractice

-  runningmulti-nodedevelopmentenvironment-  privatedockerregistry-  imagePullPolicy:Always

-  authenticateasubscriber-  findanerror-  fixtheerror-  updatetheenvironment

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VOLTHA

ONOS

NNI

OLTONU

UNI

Compute

AGG

OSS 802.1XAuthentication

NetworkEdgeMediator(NEM)

BNG

1 Subscribers

2 EAPOL

4 Addsubscriber

RADIUS

RG

3 Authsucceeded

5 Programflows

802.1XAuthentication

BNG

VOLTHA

ONOS

NNI

OLTONU

UNI

Compute

AGG

NetworkEdgeMediator(NEM)

RG

Workflow Subscriber vOLT X-Connect RADIUS Kafka

1 AuthSucceeded

Thanks!

Anyquestion?

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References

-  https://en.wikipedia.org/wiki/Docker_(software)

-  https://kubernetes.io

-  https://helm.sh

-  https://guide.opencord.org

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