This document summarizes a presentation about Juju, an open source tool for service orchestration. It discusses how Juju is used to deploy and relate services on cloud platforms, provides an example of deploying a MediaWiki application, and outlines Juju's future including a charm store, subordinate charms, and auto scaling. The presentation promotes Juju as a way to declaratively define and manage applications and infrastructure.

1. Juju – Welcome to Service Orchestration
●
VCLUG/VC PHP December 3, 2011
●
Clint Byrum <clint.byrum@canonical.com>
●
SpamapS on IRC
●
http://juju.ubuntu.com/
1 Presentation by Clint Byrum

2. DevOps Distilled™ - Isn't that config management?
●
Config Management ●
Service Orchestration
●
Machine Centric ●
Service Centric
●
De-coupled from provisioning ●
Coupled with provisioning
●
Knowledge Sharing Involves Customization and ●
Designed for Knowledge Sharing
assumptions. ●
Complimentary to config management
●
Analog: ./configure && make && sudo make ●
Analog: apt-get install
install
2 Presentation by Clint Byrum

3. The Cloud
http://www.flickr.com/photos/gsbrown99/2706179635/sizes/o/i
n/photostream/
http://www.flickr.com/photos/stevendepolo/4226949238/sizes/l
/in/photostream/
http://www.flickr.com/photos/kaptainkobold/5892507537/sizes/
z/in/photostream/
http://www.flickr.com/photos/emsl/4929154481/sizes/l/in/phot
ostream/
3 Presentation by Clint Byrum

4. Open Source
http://www.flickr.com/photos/smiteme/1184482747/sizes/o/in/photostream/
4 Presentation by Clint Byrum

5. Open Source + The Cloud =
Juju!
●
Yes this is the plug
●
Some things are better served by NOT being
in Ubuntu's archive.
●
Juju in many ways makes Ubuntu Server
invisible when using it properly.
5 Presentation by Clint Byrum

6. name: mediawiki
summary: "website engine for collaborative
Charms are simple work"
description: |
MediaWiki is a wiki engine (a program for
creating a collaboratively edited website).
●
Some yaml metadata It is
designed to handle heavy websites
●
A few scripts that run at the right time containing
●
Well encapsulated library-like document collections, and
supports
●
Written with whatever tool you want! user uploads of images/sounds, multilingual
●
Assumptions can be eliminated content, TOC autogeneration, ISBN links,
etc.
●
Easy to read, easy to review requires:
●
https://code.launchpad.net/charm db:
interface: mysql
slave:
interface: mysql
cache:
interface: memcache
provides:
website:
interface: http
6 Presentation by Clint Byrum

7. http://upload.wikimedia.org/wikipedia/commons/d/d8/Wikimedia-servers-2010-12-28.svg
Relationships
●
Various strategies
●
- Assumptions in code
●
- Assumptions in config mgmt.
●
- Puppet – Exported Configs
●
- Chef – Search
●
- Juju – Fundamental component
7 Presentation by Clint Byrum

8. http://upload.wikimedia.org/wikipedia/commons/d/d8/Wikimedia-servers-2010-12-28.svg
Relationships
●
Various strategies
●
- Assumptions in code
●
- Assumptions in config mgmt.
●
- Puppet – Exported Configs
●
- Chef – Search
●
- Juju – Fundamental component
8 Presentation by Clint Byrum

9. Example: Mediawiki
● juju deploy mysql wiki-db
● juju deploy mediawiki demo-wiki
● juju deploy memcached wiki-cache
● juju deploy haproxy wiki-balancer
● juju add-unit wiki-cache
● juju add-unit demo-wiki
● juju add-relation wiki-db:db demo-wiki:db
● juju add-relation wiki-cache demo-wiki
● juju add-relation wiki-balancer:reverseproxy demo-wiki:website
9 Presentation by Clint Byrum

10. Add slaves
● juju deploy mysql wiki-slave-db
● juju add-relation wiki-slave-
db:slave wiki-db:master
● juju add-relation demo-
wiki:slave-db wiki-slave-db:db
10 Presentation by Clint Byrum

11. Result
wiki-balancer/0
ec2-174-129-69-54.compute-1.amazonaws.com
wiki-balancer
local:haproxy-14
demo-wiki/0
demo-wiki/1 ec2-50-16-127-225.compute-1.amazonaws.com
ec2-50-16-149-161.compute-1.amazonaws.com
demo-wiki
local:mediawiki-68
db
db
che
wiki-db/0 wiki-slave-db wiki-cache/1
ec2-50-19-198-127.compute-1.amazonaws.com local:mysql-98 ec2-75-101-216-57.compute-1.amazonaws.com
wiki-cache
local:memcached-11
wiki-db wiki-slave-db/0
local:mysql-98 ec2-50-17-77-63.compute-1.amazonaws.com wiki-cache/0
ec2-184-72-144-240.compute-1.amazonaws.com

12. Configure
● juju set demo-wiki name=”Life, The Universe, and Everything”
● juju deploy mediawiki –config=arthur-dents-wiki.yaml arthur-
dents-wiki
12 Presentation by Clint Byrum

13. Charms today
ThinkUp
HAProxy
MySQL Jenkins

14. Deployment Options
●
EC2 API
●
Ubuntu Orchestra
●
Local Dev
●
??? Fully abstracted
14 Presentation by Clint Byrum

15. The Future
●
Charm Store
●
Subordinate Charms
●
Placement Constraints
●
Stacks
●
Storage Management
●
Cloud Federation
●
Auto Scaling
●
Charms, Charms, Charms, Charms...
http://www.flickr.com/photos/tom_twinhelix/3916931452/sizes/l/in/photostream/
15 Presentation by Clint Byrum

16. THANK YOU
●
https://juju.ubuntu.com/
●
https://cloud.ubuntu.com/
●
https://launchpad.net/juju
●
#juju on Freenode
●
Clint Byrum <clint.byrum@canonical.com>
16 Presentation by Clint Byrum