From How-To to POC to Production: Learning by Building Presented - - PowerPoint PPT Presentation

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From How-To to POC to Production: Learning by Building Presented - - PowerPoint PPT Presentation

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From How-To to POC to Production: Learning by Building Presented By: Grant Kirkwood, CTO Unitas Global March 4, 2017 SCALE 15x Pasadena, Calif 1 OPENSTACK WHAT IS OPENSTACK? Science experiment A mess of competing

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From How-To to POC to Production: Learning by Building

Presented By: Grant Kirkwood, CTO – Unitas Global March 4, 2017 – SCALE 15x – Pasadena, Calif

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OPENSTACK

WHAT IS OPENSTACK?

  • “Science experiment”
  • “A mess of competing projects and priorities”
  • “De facto choice for new private clouds”
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ONE DOES NOT SIMPLY LEARN OPENSTACK

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FROM HOW-TO: TO POC: TO PRODUCTION! LEARNING BY BUILDING…

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STEP 1:

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DEVSTACK

WHAT IS IT?

  • Scripted install
  • All-in-one
  • Up and running in minutes
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WHAT YOU NEED

  • Laptop!
  • VirtualBox
  • Ubuntu
  • DevStack

+ +

DEVSTACK

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DOWNLOAD

  • VirtualBox:

https://www.virtualbox.org/wiki/Downloads

  • Ubuntu:

http://releases.ubuntu.com/16.04/ubuntu-16.04.10-server-amd64.iso

DEVSTACK

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INSTRUCTIONS

  • Install VirtualBox
  • Create an Ubuntu VM
  • Install DevStack
  • Help found here:

http://ronaldbradford.com/blog/downloading-and-installing-devstack-2016-04-02/

DEVSTACK

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  • Step by step instructions here
  • Tested…. it works!
  • Thanks Ronald Bradford

http://ronaldbradford.com/blog/downloading-and-installing-devstack-2016-04-02/

DEVSTACK

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WHAT WE LEARNED

  • CLI basics
  • How Horizon (etc) should work (and look)

DEVSTACK

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STEP 2:

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WHAT IS IT?

  • Step-by-step walkthrough
  • “Vanilla” / trunk-based
  • Not scripted – each component built by hand

HOW-TO

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WHAT YOU NEED

  • Some hardware ideal
  • Intel NUCs are good
  • VLAN-capable switch
  • Patience!

HOW-TO

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DOWNLOAD

  • Ubuntu:

http://releases.ubuntu.com/16.04/ubuntu-16.04.10-server-amd64.iso

  • Documentation:

http://docs.openstack.org/mitaka/install-guide-ubuntu/

  • A good text editor:

https://atom.io

  • A note on versions…

HOW-TO

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DOWNLOAD

  • Documentation:

HOW-TO

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DOCUMENTING

  • Why the good text editor?
  • Documenting your work critical
  • You WILL do things wrong
  • You WILL want to do things differently next time

around… yes next time

HOW-TO

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DOCUMENTING

  • Leave yourself

some notes!

  • Will save you grief

later…

  • And helps with

learning

  • …AND will need for HA

HOW-TO

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INSTRUCTIONS

  • Internet (2 networks)
  • Switch
  • 3+ Servers
  • Architecture decisions in official how-to doc
  • Use provider networks with self-service option

HOW-TO

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INSTRUCTIONS

  • Initial network setup
  • Translate to home network…

http://docs.openstack.org/mitaka/install-guide-ubuntu/environment-networking.html

HOW-TO

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TOPOLOGY

  • 192.168.10.0/24
  • Cut it in half…
  • 10.0.10.0/24

Internet Router Switch Compute 1 Controller Compute 2, etc.

HOW-TO

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CORE COMPONENTS

  • Contents from How-To Tutorial:
  • Essential: Environment, Identity,

Image, Compute, Networking, Dashboard, Block Storage

HOW-TO

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OPENSTACK TIME MACHINE

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LIFTOFF

  • Time to launch your first VM…
  • Good chance it won’t work
  • Where to look for clues
  • Remember Devstack…

HOW-TO

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LOOKS LIKE THIS: FEELS LIKE THIS:

WHEN YOU (SUCCESSFULLY) LAUNCH YOUR FIRST VM…

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WHAT WE LEARNED

  • OpenStack under the hood
  • How all the components work together
  • Where to look for clues when something goes wrong
  • CLI in-depth

HOW-TO

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SHORTCOMINGS

  • Not designed to scale
  • Not optimized for performance
  • Not built highly available
  • Wouldn’t use this in production

HOW-TO

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NEXT STEPS

  • Tear it down and start over! J
  • Do it from your notes this time

(how-to phone-a-friend)

  • Fix the things you want to improve
  • Make sure documentation complete – will need

for POC

HOW-TO

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NOT QUITE READY FOR POC…

  • A proof of concept has to be built with business

use in mind

  • That means we have a bunch of new stuff to learn

HOW-TO

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SCALABILITY & RELIABILITY

  • Now the fun begins…
  • First, time to upgrade storage: Ceph!
  • Start by changing Glance to a Ceph backend
  • Keep it simple – only change one thing at a time!
  • Then change Cinder to use Ceph for volumes

HOW-TO

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SCALABILITY & RELIABILITY

  • Building for high availability: wrapping services in

more services… service burritos?

  • What components do we use? Where do they fit?
  • Can’t really build on top of the existing config
  • This is just one way to do it…

HOW-TO

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HIGH AVAILABILITY

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MariaDB RabbitMQ

HIGH AVAILABILITY

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MariaDB RabbitMQ

Private VLAN for RabbitMQ Private VLAN for MariaDB

MariaDB RabbitMQ MariaDB RabbitMQ

Galera Galera

HIGH AVAILABILITY

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MariaDB RabbitMQ MariaDB RabbitMQ MariaDB RabbitMQ

Private VLAN for RabbitMQ Private VLAN for MariaDB Galera Galera

HAProxy Keepalived I P I P I P V I P Linux Bridge network Linux Bridge network Linux Bridge network Private VLAN for OpenStack Management

HIGH AVAILABILITY

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SCALABILITY & RELIABILITY

  • Ok, so that’s the controllers!
  • Now that we know how it fits together…
  • Back to your build notes!

HOW-TO

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SCALABILITY & RELIABILITY

  • Notable changes – service endpoints
  • Update hosts file with pointer to HA endpoint
  • …which means build the service endpoints to IPs that

don’t initially exist!

  • Update haproxy as you go along

HOW-TO

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SCALABILITY & RELIABILITY

  • Example:

HOW-TO

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TESTING

  • Break it!
  • Looping VM launching
  • Power cycle controllers mid-cycle
  • Haproxy stats helpful
  • Tempest, Rally, etc.

HOW-TO

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HOW-TO

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STEP 3:

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NOW THE FUN BEGINS

  • You know how it all works now…

but…

  • Throw everything you just learned
  • ut the window!

PROOF OF CONCEPT

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QUESTION:

  • Are you in the business of building and operating

technology infrastructure?

PROOF OF CONCEPT

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DECISIONS

  • Are we building for a business requirement?
  • Must assume POC will be used

(after all, if not, it wasn’t a successful POC!)

  • Therefore, build as if for production
  • Don’t want to be doing this by hand…

PROOF OF CONCEPT

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DECISIONS

  • Deployment method
  • Distribution?

(refer to question 1)

  • Automation

ie; OpenStack-Ansible

  • Hardware

PROOF OF CONCEPT

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BUSINESS REQUIREMENTS

  • Define business requirements & success criteria
  • Keep it simple to start!
  • Each service adds complexity, whether or not used
  • Conduct surveys: regimented/consistent process

for adding new services

PROOF OF CONCEPT

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GETTING STARTED

  • Build small environment using distribution of choice

now that you understand how it works inside (or non-distribution with OpenStack-Ansible)

  • Test business applications in environment

PROOF OF CONCEPT

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UPDATES & UPGRADES

  • Brain surgery…

PROOF OF CONCEPT

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STEP 4:

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DEFINITION

  • Supporting business-critical workload
  • Downtime not an option
  • Tied to revenue (and thus our jobs!)

PRODUCTION

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OPERATIONAL REQUIREMENTS

  • Monitoring
  • Tracking
  • Measuring performance
  • Updates & upgrades

PRODUCTION

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AUTOMATION

  • Much of what you did is automated with major

distributions

  • Still critical to understand how it all works
  • Serves as foundation for production grade
  • perational excellence

PRODUCTION

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Testing the waters with DevStack

  • VirtualBox and a laptop
  • Up and running in minutes
  • Get comfortable with how it should work

Build with How-To

  • Build it by hand with openstack.org

tutorial

  • Learn how the pieces work together
  • Document and take notes like crazy!

High availability and scalability

  • Upgrade storage to Ceph
  • Make all services HA
  • Try to break it

Proof of Concept

  • Define business objectives
  • Desire to build/operate or consume?
  • Switch to distribution
  • Keep it simple, add services

slowly/thoughtfully

  • Test, break, break again

Production

  • Monitoring
  • Tracking
  • Updates & upgrades

ROADMAP / SUMMARY

LEARNING BY BUILDING

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CONTACT

Contact Us

Presenter

Grant Kirkwood - CTO, Unitas Global grant.kirkwood@unitasglobal.com IRC: tnarg Twitter: @prolixity

Visit Us!

Booth #610 (on the left when you walk in – next to Disney)