dude… you put devops in your network? netdevops!€¦ · dude… you put devops in your network?...

Dude… You put DevOps in your

Network? NetDevOps!An evolution that goes beyond Infrastructure as Code and Automation

@hfprestongithub.com/hpreston

Hank Preston, Principal EngineerNetDevOps Evangelistccie 38336 R/S

© 2018 Cisco and/or its affiliates. All rights reserved. Cisco Public

What is NetDevOps?


Sometimes referred to as…

DevNetOps NetOps SuperNetOps

Network Reliability Engineering (NRE)


Network Operations in the Dark Ages (aka Today)


Consider the Network Stakeholders

Network Builders

• Traditional networking teams

• Design, Build, and Maintain the Network

• Responsible for Care and Feeding

Network Consumers

• The users of the network

• Looking to consume network “services”

• The network is a “utility” – It should just work


• Functional but considered fragile

• Network configuration more “art than science”

• Tribal knowledge of key engineers

Today’s reality…


“Every time we implement a network change something goes wrong…”

“Isn’t it great, our switch hasn’t been rebooted in 6 years”

“We can’t update/change the network, our business won’t allow it”

* Paraphrased quotes from actual network operators

Don’t encourage this kind of behavior!!!!


• Haphazard collection of technologies

• Forensic research tool

• Scale challenges

• Lack of consistent and standard data models

• Performance impact on network

Network Monitoring Today


Changes happen rarely

Changes are big and

complicated

The team isn't well

practiced.

Change seen as high risk

Problem occurs during

change

Change seen as failure

Organizations Today have a

“Culture of Fear”

Today’s Network Operations Culture and Mindset


The Age of Enlightenment and NetDevOps


• Embrace failure

• Change is good

• Active collaboration

• Empowered accountability

• Feedback systems

• Automation

What is the “DevOps Culture”?


The NetDevOps Culture and MindsetChanges are

regular activities

Each change is

small

The team is well

practiced

Change was tested and

verified

Change was uneventful

Change seen as success

NetDevOps will require a

“Culture of Change”

So what can we do about it?


• Network as Code and Configuration Managementstrategies

• Continuous Development approach to network changes.

• Continuous health and improvement approach to monitoring.

Configuration, Automation & Monitoring Principles


“Infrastructure as Code (IaC) is the process of managing and provisioning computer data centers through machine-readable definition files...”

Infrastructure as Code… huh?

https://en.wikipedia.org/wiki/Infrastructure_as_Code

https://en.wikipedia.org/wiki/Infrastructure_as_Code

This doesn’t count as “Network as Code”(or at least isn’t ENOUGH)


Definition by Hank

Configuration Management: A mechanism for maintaining the characteristics of a system.


• No more hand to hand combat configuration management

• Configuration Management today is about the “tools”

Mechanism = Automation

Consistency + Scale

Success!


• The software and version installed

• System attributes like name, address, ownership, etc

• Feature specific configurations

Characteristics = Desired State


Definition by Hank

Configuration Management: A mechanism for maintaining the characteristics of a system.


• Network Configuration stored in Source Control

• Changes are proposed in code “branches”

• CICD Build Servers deploy and test proposed configurations

• Successful configurations automatically deployed to “Production”

Continuous Delivery Pipeline for Network Configuration


Example NetDevOps CICD EnvironmentSetup and run this demo: https://github.com/DevNetSandbox/sbx_multi_ios

Version Control

Network Simulation

Source Control/

Build

Chat and Notifications

Infrastructure as Code

Dev Network Environment

Network Testing

https://github.com/DevNetSandbox/sbx_multi_ios


NetDevOps Will Deliver

Consistent Version Controlled Infrastructure deployed with Parallel & Automated Provisioning


• Modern data analytics tools

• Single data feed point from network

• New streaming telemetry protocols and standards

• “Real-time” data

• Actionable monitoring

Monitoring for NetDevOps

Data Ingest and Processing

Scalable Storage Platform

Query Engine

Visualization Platform

Learning and Analytics

Action and Response

But I’m just a router jockey…

Becoming the NetDevOps Engineer


Network Skills

• Spanning-Tree

• Routing Protocols

• QoS

• VPN Design

• VOIP

• Fibre Channel

• Security Policy

• MPLS

Programming Skills

• TCL

• EEM

• Expect Scripts

Yesterday’s Network Engineer


Network Skills

• Layer 2 & 3 Fundamentals

• Quality of Service

• Security and Segmentation

• Linux Networking

• Container Networking

• Cloud Networking

• IOT Networking

• Model Driven Programmability

• Network Function Virtualization

Platform Skills

• Linux Administration

• Container Fundamentals

• Micro Service Platforms

• Cloud Fundamentals

Programming Skills

• Data Formats

• Python and APIs

• Source Control

• Configuration Management

The NetDevOps Engineer


Carl’s 3 Step Approach to become a NetDevOps Engineer

Phase 1

• Python • REST APIs• JSON/XML• git/GitHub

• Linux Skills• Config Management• Docker• NETCONF/YANG

• Linux Networking • Container Networking • NFV

• Network Controllers• IOT Networking• Cloud Networking• ”DevOps”

Phase 2 Phase 3

As Needed


Distributed Source Control(git, Subversion, Mercurial, GitHub, BitBucket, GitLab)

The NetDevOps Engineers Tool Bag

Network Device

YANG/Native Data Model

Configuration Data Operational Data

Configuration Management(Ansible, Puppet, NSO, NAPALM, DIY)

Network Virtualization

Platforms(VIRL/CML, NFVIS,

Vagrant)

Build Server(GitLab, Jenkins, Team City, Drone)

Network Test Tooling(PyATS, TRex, Robot, Behave)

Telemetry & Monitoring(ELK, Grafana, Pipeline, UTM)

Development Environment(Vagrant, NSO, VIRL/CML)

Test Environment(VIRL/CML)

Production Environment

CLI SNMPNETCONF/RESTCONF

gRPC REST APIs

Example tools, not comprehensive

Who’s excited about the vision of NetDevOps?


• The Dark Arts of Network Operations

• The Age of Enlightenment and NetDevOps

• Becoming the NetDevOps Engineer

Review


• Weekly Webinar and Video Series

• Season 1 Sept – November

• Topics include Python, Ansible, Git/GitLab, Kubernetes, pyATS, NSO, ML/AI

Checkout NetDevOps Live!developer.cisco.com/netdevops/live

https://developer.cisco.com/netdevops/live


• NetDevOps on DevNet

• NetDevOps Readings

• Embrace NetDevOps, Say Goodbye to a "Culture of Fear”

• NetDevOps Goes Beyond Infrastructure as Code

• What does "Network as Code" Mean?

• A Network Engineers Journey in Programmability

• NetDevOps Learning Resources

• Network Programmability Basics Video Course

• NetDevOps Live! Video Series

• NetDevOps Learning Track

• NetDevOps Videos

• How to be a Network Engineer in a Programmable Age

• Network as Code in Action

• Benefits of Configuration Management

What do do next?

https://developer.cisco.com/netdevops/

https://blogs.cisco.com/developer/embrace-netdevops-part-1

https://blogs.cisco.com/developer/embrace-netdevops-part-2

https://blogs.cisco.com/developer/what-does-network-as-code-mean

https://learningnetwork.cisco.com/blogs/community_cafe/2017/03/27/a-network-engineer-s-journey-in-programmability

https://developer.cisco.com/video/net-prog-basics/

https://developer.cisco.com/netdevops/live/

http://learninglabs.cisco.com/tracks/netdevops

https://developer.cisco.com/video/net-prog-basics/00-intro/intro

https://www.youtube.com/watch?v=N8boXPYdbxg

https://www.youtube.com/watch?v=5kGFJWjTQOo


Got more questions? Stay in touch!

[email protected]

@hfpreston

http://github.com/hpreston

@CiscoDevNet

facebook.com/ciscodevnet/

http://github.com/CiscoDevNet

Hank Preston developer.cisco.com

Thank you for joining us! Learn more at:

w w w . o h n u g . o r g

dude… you put devops in your network? netdevops!€¦ · dude… you put devops in your network?...

Documents