Open stack summit surviving your first checkin

www.Nexusis.com 877.286.39871

Surviving your first check-in: An engineers guide to contributing to OpenStack

Colin McNamara – Director, DC Practice Nexus ISCCIE #18233

@COLINMCNAMARA10/16//2012


Agenda

How this all started – “a simple experiment”

The importance of community - Leveraging the power of the meetup

Talking your employer into supporting OpenStack and the CLA

Setting up your Dev environments - getting beyond Devstack

“Getting” git, using the git repository for those that don't code for a living

Testing your code - what do you mean it doesn't build?

How to give back, and get other people involved in the community


My Background


My Perspective

Network Engineer first

Systems/Storage Second IEEE, IETF, T11

Linux user since 98

Creator of “Sausage Code”

NOT A PROGRAMMER


How this craziness started


“A simple experiment”

Ewan Mellor – Citrix Xen

Simple feature, Deploy Storage QOS

Turned into a 4 month saga

Lots of lessons to be learned


Leveraging the power of the Meetup


Meetup.com – Community is your friend

Join a Meetup.com group http://www.meetup.com/

openstack/

If there is none in your area– Start One

Many eyes help in overcoming challenges


Talking to your employer about contributing


Talking to your employer about contributing

Notify your manager. If you don’t have a policy you have a chance to set one.

In Ca, you are only protected if your company isn’t in the line of biz your project is.

If you are contributing on behalf of a company, an authorized representative of your company should also sign a Corporate Contributor License Agreement.

https://rackspace.echosign.com/public/hostedForm?formid=XFNNZV3W23XE7N


Next steps – Executing your CLA

Create your launchpad account *** don’t change your username after ***

Join the OpenStack team on launchpad

Sign the CLA electronically

Update the Contributors Wiki

Request openstack-cla membership on launchpad

Wait (or ping an op on #openstack-dev)


Setting up your Dev environment


10 minutes to Devstack

Best run on Ubuntu 12.04

Log in as a USER (not root)

Sudo apt-get install git

git clone https://github.com/openstack-dev/devstack.git

cd devstack && ./stack.sh

https://github.com/openstack-dev/devstack.git

https://github.com/openstack-dev/devstack.git


Getting beyond Default Devstack

I like to run in a VMware environment

Spin up new instances easily

Quickly compare versions

Default install pushes QEMU


Getting beyond Default Devstack - Stackrc

/devstack/stackrc

Adjust API’s / Services

Change git repos


Getting beyond Default Devstack - Stackrc

~/devstack/stackrc updated to point to working development branch

Refs/changes/50/5050/1 is the review ID


You’ve made a change, Now What?

./rejoin_stack.sh will attach you the screen with all the terminals for the various apps. There could be as many as 14 screens depending on how many services are enabled

“ctrl-c” and “ctrl-d” on each window to kill the process. “ctrl-a n” takes you to next terminal. Restart the process by using up-arrow key and entering return

Another easier way to kill all and restart is to do “screen -ls” and kill the process. Restart by ./rejoin_stack.sh


“Getting Git” OpenStack Workflows


What is Git ?

Repository created for Linux Kernel Dev

Solves centralization problems – you can code at the lake, or in your isolated lab

Can be complex (multiple ways of doing things)


Setting things up – Installing Git

Install Git

Install DevStack

Configure git

Install git-review

Clone a project

Verify gerrit works


Setting things up – Installing DevStack

Install Git

Install DevStack

Configure git

Install git-review

Clone a project

Verify gerrit works


Setting things up – Configuring Git

Install Git

Install DevStack

Configure git

Install git-review

Clone a project

Verify gerrit works


Setting things up – Configuring git-review

Install Git

Install DevStack

Configure git

Install git-review

Clone a project

Verify gerrit works

Git review redirects a commit into a review and test process


Setting things up – Cloning a project

Install Git

Install DevStack

Configure git

Install git-review

Clone a project

Verify gerrit works


Setting things up – Testing Gerrit

Install Git

Install DevStack

Configure git

Install git-review

Clone a project

Verify gerrit works

This error held us up for 2 weeks…


Setting things up – Generate your public key

Install Git

Install DevStack

Configure git

Install git-review

Clone a project

Verify gerrit works


Setting things up – Add your key to review.openstack.org

Install Git

Install DevStack

Configure git

Install git-review

Clone a project

Verify gerrit works


Setting things up – Add your key to review.openstack.org

Install Git

Install DevStack

Configure git

Install git-review

Clone a project

Verify gerrit works

Works -

Doesn’t Work -


Making, Testing and submitting changes


Pro Git – Well worth the price

I didn’t write it, but this book is great

It is on Safari Books Online


Setting things up

Create a topic branch

Change code

Test Code

Commit Changes

Submit them for review

Monitor the review process


Edited v1_1 api to describe phys as well as virt CPU


Change code

Test Code

Commit Changes




./Run_tests.sh in each project


Change code

Test Code

Commit Changes




Commit your code


Change code

Test Code

Commit Changes



Be verbose, and be sure to call out whether a feature is blueprinted or a bugfix


Submit it for review!!


Change code

Test Code

Commit Changes




Track the reviews progress


Change code

Test Code

Commit Changes




Giving back Engaging the community


Giving back

Start a meetup.com group in your area

Attend Sean Roberts session on building community

Present to your peers

Share your experience with the world


@colinmcnamarawww.colinmcnamara.com / www.nexusis.com

http://www.colinmcnamar.com/

Open stack summit surviving your first checkin

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