DevOps, but Why?

A presentation at Cisco Live EMEA 2020 in January 2020 in Barcelona, Spain by Quintessence Anx

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DevOps, but Why? DevOps for Network Engineers Quintessence Anx, Technical Evangelist @QuintessenceAnx DEVLIT-4007

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Agenda • Introduction • What is DevOps • Philosophy • How it is Implemented • Implications of DevOps for Network Engineers • Conclusion DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public 3

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“The cornerstone of DevOps is its philosophy: to create an agile and scalable system by involving both operational and development engineers in all stages of product creation, from idea to release.” DjangoStars By FixMe DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public 4

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“To integrate this philosophy into the workflow, you use certain practices — CI/CD, automation, infrastructure as code, microservice architecture, etc.” DjangoStars By FixMe DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public 5

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“And, finally, there is a bunch of tools to implement those practices: Docker, Jenkins, CircleCI and much, much more.” DjangoStars By FixMe DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public 6

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That’s great, but what does that mean? DEVLIT-4007

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By Way of Example, a DevOps Tale DEVLIT-4007

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Our Characters DEVLIT-4007

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Let’s talk about Jayne (Cobb) Jayne Cobb • Software Developer • Responsible for writing and maintaining only The Coolest Things • Needs to work quickly so his employer can keep up with the competition Session ID © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public 10

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And (George) Parley George Parley • Operations / IT specialist • Responsible for maintaining the infrastructure that runs The Coolest Things • (Not so secretly thinks that this is the coolest thing.) • Also needs to work quickly so her employer can keep up with the competition. Session ID © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public 11

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And Theo Putnam Theo Putnam • Network Engineer • Makes sure that Jayne’s “Coolest Things” and George’s “Coolest Things” can actually communicate • Knows that there’s no point in Being Cool if you can’t communicate … • • … and that the same goes for software and infrastructure Also, you guessed it, needs to work quickly so his employer can keep up with the competition Session ID © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public 12

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Jayne: Let’s deploy some software. DEVLIT-4007

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Parley: 😅 DEVLIT-4007

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Theo: 🍿 DEVLIT-4007

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And so it begins… Request for sandbox Deployment Request Errors in Prod Parley receives Jayne’s request for services. Jayne finished the feature, sends to Parley for deploy Problems appear in prod that were not in the sandbox(es). Dev Requests Services Approved Deployment Day! Rinse, repeat Jayne organizes and starts work on features and bugs. Services approved and live, Parley notifies Jayne Parley deploys all dev features and bug fixes – including Jayne’s. Jayne and Parley are looking forward to next month… DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public 16

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Why does it look like this? DEVLIT-4007

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Jayne is not the only developer, Parley has other requests from that team. DEVLIT-4007

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Parley also has other teams sending requests besides dev. DEVLIT-4007

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Both Jayne and Parley are doing things manually; therefore… DEVLIT-4007

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…both Jayne and Parley are blocking each other and… DEVLIT-4007

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…both are causing delays / bottlenecks. DEVLIT-4007

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There must be a better way. DEVLIT-4007

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DevOps = Dev + Ops DEVLIT-4007

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DevOps Allows Teams To … DEVLIT-4007

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#1 Get Feedback Faster DEVLIT-4007

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#2 Respond to That Feedback Faster DEVLIT-4007

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#3 Reduce Risk DEVLIT-4007

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#4 Improve Communication DEVLIT-4007

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#5 Adapt to Scale DEVLIT-4007

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All of which yields … DEVLIT-4007

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… faster release cycles DEVLIT-4007

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… faster detection of issues (MTTD) DEVLIT-4007

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… faster resolution of issues (MTTR) DEVLIT-4007

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… and improved service level agreements and objectives (SLA, SLO) DEVLIT-4007

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And now for Theo DEVLIT-4007

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(Did you think I forgot Theo?) DEVLIT-4007

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All of which leads to …

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… slower resolution times

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… slower deploy times

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… manual errors

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Essentially

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“If a team is not operating in the same way as the rest of the business, then all other departments will be slowed down as the siloed department is not agile enough.” — Steven Armstrong, Bringing DevOps to Network Operations (Packt) DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public

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So what can Theo do?

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Bring DevOps to Networking! (NetOps? DevNetOps?) 🤔 DEVLIT-4007

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Clarification! DEVLIT-4007

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This does not mean “just switch to public cloud”. DEVLIT-4007

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That will hide problems, not fix them. DEVLIT-4007

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Onward to change! DEVLIT-4007

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Automate where possible DEVLIT-4007

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(e.g. Did you know you can use Ansible with Cisco IOS?)* * Link in resources DEVLIT-4007

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Improve measurements DEVLIT-4007

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And Monitor! DEVLIT-4007

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What are the results of change? DEVLIT-4007

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Faster response to changes DEVLIT-4007

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Lower mean time to resolve (MTTR) DEVLIT-4007

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Increased uptime DEVLIT-4007

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(and) Higher number of deployments DEVLIT-4007

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(Note that these are 4 of the DevOps KPIs 😉) DEVLIT-4007

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For even more info about how you too can DevOps, please take a look at my Resources. DEVLIT-4007

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Before you go… • DevOps is a philosophy that helps traditional “dev” and “ops” teams work together • DevOps practices can also be applied to other areas, like networking • Applying DevOps practices will yield improvements in response time, reduced errors, and reduced risk. DEVLIT-4003 DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public

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Before you go… • DevOps is a philosophy that helps traditional “dev” and “ops” teams work together • DevOps practices can also be applied to other areas, like networking • Applying DevOps practices will yield improvements in response time, reduced errors, and reduced risk. • For more questions: please join the WebEx room DEVLIT4007 • Help me iterate – complete the survey and tell me your thoughts! DEVLIT-4003 DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public

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Slides, Live Streaming, and Recordings Available on Cisco Live https://www.ciscolive.com/online References & Reading Available on Notist https://noti.st/quintessence DEVLIT-4007

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Cisco Webex Teams Questions? Use Cisco Webex Teams to chat with the speaker after the session How 1 Find this session in the Cisco Events Mobile App 2 Click “Join the Discussion” 3 Install Webex Teams or go directly to the team space 4 Enter messages/questions in the team space • DEVLIT-4007 DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public 68

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Start Here | Upcoming Cisco DevNet Certifications • Start at Meet DevNet DEVNET-2864: Getting ready for Cisco DevNet Certifications Offered daily at 9am, 1pm & 4pm at Meet DevNet • Attend a brownbag session DEVNET-4099: DevNet Certifications: Bringing software practices & software skills to networking Offered daily 12:15-12:45 in the DevNet Zone Theater • Visit the Learning@Cisco booth • Scan this code to sign up for the latest updates or go to http://cs.co/20eur02 DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public

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Find shared code repositories of use cases for network automation & more! Don’t miss our 5 Automate Infrastructure demos in the DevNet Zone! Scan this code or go to the URL to learn more Start at Meet DevNet DEVNET-3010 [a-j] Learn how to make Network Automation Simple with the Community Offered Monday 2pm & 5pm, Tuesday & Wednesday 10am, 2pm & 5pm, and Thursday 10am & 5pm at Meet DevNet http://cs.co/20eur01 DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public

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Learn more about the new DevNet Certifications and how you can prepare now! Associate Level Specialist Level Professional Level Expert Level Engineering Future Offering Software DEVLIT-4007 © 2020 Cisco and/or its affiliates. All rights reserved. Cisco Public

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Thank you