Automating Networking! Do I Have to Start at Ground Zero?

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Automating Networking! Do I Have to Start at Ground Zero?

Gerard Chami - Technical Support Engineer

Me!

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Gerard ChamiTechnical Support Engineer

[email protected]

Twitter: @gerardchamigithub: https://github.com/gchami

What is Cumulus Linux?

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BIOS and PXEIndustry Standard Server

SERVER OS

NETWORK OSBoot Loader and Industry Standard Switch

cumulusnetworks.com

User

Spa

ceArchitecture– Cumulus Linux Operating System as a Platform

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SwitchDriver

switchd

CPU, RAM, Flash, etc.

Routing Tables

ARPTable

BridgeTable

Ethernet Interfaces

Lin

ux K

erne

l

Automation Monitoring

Third Party/Customer Applications

Network OrchestrationRouting

SuiteBridging VXLAN

Switch SiliconFront Panel Ports

cumulusnetworks.com

But Why should we care?

Your choice of a network OS!Provides Hardware ChoiceBuild and Automate on a Linux OSOh and its just Linux!

Treat my switch as a server!

Cumulus Networks

▪ Infrastructure as code

▪ Enforcement from central location

▪ Easy change control

Configuration ManagementHot Swap the Whole Switch▪ With automation the

whole switch can be replaced and provisioned

▪ High capacity, fine-grained failure domain

▪ Weeks and months now take seconds

▪ Pods of equipment can be stamped out in multiple locations

Rapid Provisioning

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NetDevOps: The 90’s called, they want their frosted tips back!

OBM OBM OBM

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Where do we start?

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The Obvious (or is it?)

Git!….Check out our Github for examples!https://github.com/CumulusNetworks

Cumulus Workbench - See this in action! Puppet Forge - Cumulus Linux Modules +

Debian modulesCumulus VX - Play, Test, Develop and deploy

on the free virtual machinesNetDevOps - We will get there!

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Bringing it all together!

Task 1: Installing and booting a Network OSTask 2: Installing Puppet Agent

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ONIE – Open Network Install Environment

Modern, efficient installerNetwork OS installer

• Discovery, transfer, and execution• Implemented through Linux kernel with BusyBox

(OpenWRT-like)

Industry supportEnables open network hardware ecosystemOpen sourceWell-documented

• http://www.onie.org/

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cumulusnetworks.com

Zero Touch Provisioning

Automation option at first Cumulus Linux bootRequest DHCP lease on management networkIf option 239 and URL in response, then:

• Request contents of script at URL• Parse script for CUMULUS-AUTOPROVISIONING• Execute script locally on switch as root (unless previously

successfully run)

Supported languagesBashPerlPythonRuby

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If eth0 is set to DHCP, Zero Touch Provisioning can be triggered (unless previously successful run) when:

• Switch boots up• eth0 is brought down and up

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ONIE and ZTP Interaction

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DHCP Request with ONIE Option

DHCP Address with URL for OS Image

DHCP Request with ZTP Option

DHCP Address with ZTP script URL

Pull Puppet Scripts

OS Booted

Baseline Configuration Applied

Device Specific Configuration Applied

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Bringing it all together!

Task 1 => Installing and booting a Network OSTask 2 => Installing Puppet AgentTask 3 => Now What????

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What are we automating!?!

Our desired state - Without touching the switch!

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Install the OS

ZTP Provisioning

Install Puppet agent

Configure MOTD

Configure PTM

Configure interfaces

Configure SVI

Deploy OSPF

Deploy Bridges

Modules can be your friends

cumuluslinux/cumulus_interfacescumuluslinux/cumulus_interface_policy

cumuluslinux/cumulus_licensecumuluslinux/cumulus_ports

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Cumulus Networks

Demo Time

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Install the OS

ZTP Provisioning

Install Puppet agent

Configure MOTD

Configure PTM

Configure interfaces

Configure SVI

Deploy OSPF

Deploy Bridges

Our desired state - Without touching the switch!

Cumulus Networks 19

Cumulus VX

Want to learn networking?No Cumulus Switches? No Problem!

Cumulus Networks

Questions

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© 2014 Cumulus Networks. Cumulus Networks, the Cumulus Networks Logo, and Cumulus Linux are trademarks or registered trademarks of Cumulus Networks, Inc. or its affiliates in the U.S. and other countries. Other names may be trademarks of their respective owners. The registered trademark Linux® is used pursuant to a sublicense from LMI, the exclusive licensee of Linus Torvalds, owner of the mark on a world-wide basis.

Thank You!

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