2. Zhengpeng Hou
zhengpeng.hou@canonical.com
Canonical Ltd.

3. What is DevOps?
3

4. What drives DevOps?
●
Speed of the deployment
●
Continuous Integration, Automated Testing,
etc.
●
Fast change vs. Stability
4

5. What does DevOps “deliver”?
●
Fast repeatable server setup, consistent
environment
●
Abstract ops tasks to empower devs
●
Smaller deployments empower ops
●
Repeatable processes that let you scale out
quickly
5

6. You've got the tools already
●
Hardware
●
Virtualization
●
Platform (OS)
●
Configuration Management
●
… need to tie that together into something whole.
6

7. Manages Services, not Machines
Devops Distilled 7

8. Elevate to Juju
Service
Orchestration
Configuration
Management
Virtualization
Operating
System
Hardware
8

9. Juju is
DevOps distilled.
Charms are a shareable, re-usable, and repeatable expressions of DevOps best
practices. You can use them unmodified, or easily change and connect them to
fit your needs. Deploying a formula is similar to installing a package on Ubuntu:
ask for it and it’s there, remove it and it’s completely gone.
9

10. Juju is a community of
DevOps expertise.
Most of the application you want will be available in Juju. Juju
provides direct and free access to a DevOps community-
contributed collection of formulas
10

11. Juju provides service
orchestration.
Juju focuses on managing the service units you need to deliver a
single solution, above simply configuring the machines or cloud
instances needed to run them. Charms developed, tested, and
deployed on your own hardware will operate the same in an EC2
API compatible cloud.
11

12. Juju is intelligent.
Juju exposes re-usable service units and well-defined
interfaces that allow you to quickly and organically adjust
and scale solutions without repeating yourself.
12

13. Juju is easy.
There’s no need to learn a domain specific language (DSL) to
use Juju or create formulas. You can be up and running with
your own formula in minutes.
13

14. ●
Encapsulates services - a formula defines all
the ways the service needs to expose or
consume config data to/from other services.
●
Orchestrates provisioning (EC2, OpenStack,
Bare Metal)
●
Juju makes sharing Charms easy
14

15. 15

16. 16 Presentation by B.Saller, N.Barcet

17. 17 Presentation by B.Saller, N.Barcet

18. 18 Presentation by B.Saller, N.Barcet

19. 19 Presentation by B.Saller, N.Barcet

20. 20 Presentation by B.Saller, N.Barcet

21. $ juju bootstrap
$ juju deploy hadoop-master
$ juju deploy hadoop-slave
21

22. Charms
●
Reusable, codified best-practice.
●
Distilled deployment expertise.
●
Communication via interfaces.
●
Doesn't require foreknowledge of who will
use them or how
22

23. Relating services
23

24. Relations
●
A high-level interface describing the interactions
between services
●
Services have `provides` and `requires` interfaces
●
Juju models the relationship between services, not
machines
24

25. Scaling services
25

26. DOES THIS WEBSCALE?
26

27. Services
Services change during their lifetime:
● Number of instances?
● Which machines they run on?
● What services they depend on?
● And how those services are implemented?
27

28. $ juju bootstrap
$ juju deploy hadoop-master
$ juju deploy hadoop-slave
$ juju add-relation hadoop-master hadoop-
slave
$ juju add-unit hadoop-slave
28

29. $ juju bootstrap
$ juju deploy hadoop-master
$ juju deploy hadoop-slave
$ juju add-relation hadoop-master hadoop-
slave
$ juju add-unit hadoop-slave
$ juju add-unit hadoop-slave
29

30. $ juju bootstrap
$ juju deploy hadoop-master
$ juju deploy hadoop-slave
$ juju add-relation hadoop-master hadoop-
slave
$ juju add-unit hadoop-slave
$ juju add-unit hadoop-slave
$ juju add-unit hadoop-slave
30

31. 31

32. 32

33. ~40 charms
33

34. Juju Under the Hood
34

35. 35

36. Juju
Juju treats individual
services as atoms that are
described as charms and can
Juju environment
be instantiated one or many
times.
Cloud app
Cloud app
Cloud app
and dependency
solver
36 Presentation by B.Saller, N.Barcet

37. Juju
Load
Balancer
HAProxy Each charm defines
dependencies and/or
provides.
Depends Provides
Juju environment
Cloud app
Cloud app
Cloud app
and dependency
solver
Provides Depends
SQL Database
MySQL
37 Presentation by B.Saller, N.Barcet

38. Juju
Load
Balancer
HAProxy
Varnish Multiple charms can provide
the same service and can be
easily switched.
Depends Provides
Juju environment
Cloud app
Cloud app
Cloud app
and dependency
solver
Provides Depends
SQL Database
MySQL
38 Presentation by B.Saller, N.Barcet

39. Juju
Varnish
Varnish Juju maintains the relations
between the services so that
you don't need to care about
Juju environment
Juju Relation
the elasticity of your
environment.
Cloud app
Cloud app
Cloud app Relations are to formulas
what bounds are to atoms.
and dependency
solver
Juju Relation
Services are loosely coupled
but highly cohesive.
MySQL
MySQL
MySQL
39 Presentation by B.Saller, N.Barcet

40. Juju
Varnish Juju delivers service focused
management through their
life-cycle
Juju Relation ●
Offers the same simple rules to components
Juju environment
of you infra as we do already for packages
on your servers: dependencies, provides
●
Adds the notion of dynamic relations
Cloud app
Cloud app
Cloud app between components
●
To provide you with simple automated
elasticity that is easy to expand
and dependency
solver* ●
Working on your bare metal servers
Juju Relation
(through Orchestra*) as easily as on your
favourite clouds (AWS, OpenStack*, ...)
MySQL
40 Presentation by B.Saller, N.Barcet *coming soon

41. ●
All development is public
●
Free and Open Source Software
●
Communication is open
Join Us
●
IRC: #juju on irc.freenode.net
●
Launchpad: https://launchpad.net/juju
●
Web: https://juju.ubuntu.com/

42. cloud.ubuntu.com