Apache Stratos is a PaaS built on top of Equinox and OSGi. Stratos runs all kinds of workloads including Java, OSGi, Tomcat apps, PHP, Node.js, MySQL, Mongo, Cassandra and others. This session is an introduction to Stratos which will cover: - How to get started - Deploying on Amazon AWS and OpenStack Clouds - Workloads Stratos supports - Why and how Equinox is used - Multi-tenancy and security - Elastic scaling - How Stratos compares to other PaaS systems The session will include live demontrations of Stratos. The session is aimed at those interested in PaaS models, as well as those with a strong interest in OSGi runtimes and Equinox.

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Apache Stratos
Building a PaaS using OSGi and Equinox
Paul Fremantle
CTO and Co-Founder, WSO2
Committer, Apache Stratos
@pzfreo #wso2 #apache
paul@wso2.com
pzf@apache.org

2. About me
o CTO and Co-Founder
WSO2
o Working in Apache for
14 years
o Working with
Cloud, SOA, APIs, MQTT,
IoT
o Also presenting
tomorrow about IoT
security (M2M day
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3. The Small Print
3
Disclaimer
Apache Stratos is an effort undergoing incubation at The Apache Software
Foundation (ASF). Incubation is required of all newly accepted projects until a
further review indicates that the infrastructure, communications, and decision
making process have stabilized in a manner consistent with other successful
ASF projects. While incubation status is not necessarily a reflection of the
completeness or stability of the code, it does indicate that the project has yet
to be fully endorsed by the ASF.

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5. Today’s Buzzword Bingo!
PaaS Cloud Elastic Policy
Auto-Scale DevOps jClouds Puppet
Platform IaaS Chef Cassandra
Multi-tenant Load Balancer Governance Monitoring
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6. What is a PaaS anyway?
6

7. Gartner Reference Model for Platform as a Service
Hardware
Integrated
PaaS Platform
Management,
Monitoring, Gov
ernance,
Provisioning
System Infrastructure or System Infrastructure Services (IaaS)
PaaS Service Offerings
PaaS Technology Core
Cloud Performance Foundation
Cloud Value Foundation
(Shared Resources, Multitenancy, Self-Service, Elasticity, Real-Time
Versioning, Metadata Management, Subscription/Use Billing)
(In-Memory Computing, Grid/Massive Scale, Auto-Scaling, SLA
Enforcement, Use Tracking, High Availability, Security, Data Integrity,
Parallel Processing)
Integrated PaaS
Application
Modeling,
Design,
Development,
Maintenance,
Life Cycle
Management
Applications
PaaS
IaaS
SaaS
Application
Platform
Integration
Platform
Business
Process
Management
Platform
Cloud
Database
Platform
Other
User
Experience
Platform

8. What is Cloud?
o Depends who you are
o My daughter: iCloud (her music in the cloud)
o My mum: gmail (her email in the cloud)
o My VP sales: Salesforce (his prospects in the
cloud)
o Sysadmin: Amazon/Rackspace/etc (his
infrastructure in the cloud)
o *: what you care about, self-
provisioned, managed, metered and paid per
use, in the cloud
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9. PaaS is a cloud for developers
o Provisioning stuff developers care about:
o Not VMs, networks and disk (though that might
still be useful)
o Application environments, databases, queues
o Dev / Staging / Production
o Different runtimes:
o Java Servlet/Tomcat, Node.js, PHP, Python
o MySQL, MongoDB, Cassandra
o Etc
o Working with Git, SVN, Jenkins, etc
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10. Who needs a PaaS anyway?
o Anyone who wants to provision application
environments on-the-fly
o A basis for multi-tenant SaaS applications
o Elastic scaling and management of the
infrastructure
o Application based monitoring of the
environment
o More intelligent use of resources
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11. What is Apache Stratos?
● A Platform-as-a-Service (PaaS) Framework
● Built on OSGi and Equinox
● Donated to Apache Software Foundation
● Committers from Cisco, Citrix, SunGard, Indiana U, NASA
JPL, etc
● Deploys onto an Infrastructure-as-a-Service (IaaS)
Including Amazon EC2, VMWare vCloud,
OpenStack…etc
● Creates a secure, multi-tenant, elastic, metered,
billed PaaS Supports private, public or hybrid PaaS

12. Quick Demo
o Warning: this is alpha software
o Running on Amazon
o Accessed via Conference wifi
o Hmmm? Ok who’s idea was that
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14. 14

15. Why OSGi?
o A set of servers that need to be deployed in different
architectures:
o Single JVM for developer testing / small footprint
o Scale-out for large scale deployment
o Re-usable components from a wider set of
middleware
o Message Broker
o HTTP Load Balancer
o Identity Services
o Logging and Metering
o etc
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16. © WSO2 2011
Carbon Framework

17. © WSO2 2011
Carbon Component Manager

18. More on Carbon
o Based on Equinox
o Using p2 feature model
o Allows components to be managed and deployed from
either local or remote repo
o Handles versions and dependencies
o Supports rollback
o Command line p2 management and OSGi Console
o Consistent model for scaling
o Master/Slave + Deployment Synchronizer
o Consistent Registry/Repository
o Security model
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19. Lessons learnt from Carbon
o OSGi is a bit of a pain sometimes
o We hide as much as possible from end-users
o Used properly it enables massive productivity gains
o Small company with > 15 products and world class
deployments
o Small teams can be productive
o End users can enhance the products with their own
components
o Minification
o Scaling out
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20. What does a PaaS look like
> stratos subscribe-cartridge php myphp
--repo-url https://github.com/pzfreo/php-s4
--deployment-policy economy
Subscribes to a runtime (e.g. php)
> git push php-s4
Auto deploys the code into the cartridge
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21. Stratos Layered Architecture

22. Stratos Cartridges
● A component which can be plugged into Stratos, so that it
can use Stratos core services of the framework layer
● Cloud-aware platform environment extending legacy
technologies into the cloud and delivering cloud benefits
● Users/DevOps may create custom cartridges and host any
application, container, or framework in a Stratos Cloud. (Eg:
node.js, Ruby, MongoDB, Wordpress, .net, Oracle WebLogic
or JBoss SOA Platform..etc
● Single tenant or multi-tenanted

23. Stratos Cartridges

24. Puppet
o Puppet
o Powerful devops and provisioning tool
o Used by the cartridges to auto-provision
o Today to create a cartridge you basically build a
puppet script
o Next step is that will be a generic Puppet cartridge
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25. Multi-factored Auto Scaling
● Integrate both real-time and rule-based
decision making
● Scaling algorithm can use multiple-factors
● Capable of predicting future load

26. Scalable and Dynamic Load Balancing
● Comes with an HTTP Load Balancer as a cartridge
● Service level load balancing
● Auto Scaling load balancers
● External load balancer integration support
● Supports HAProxy for non-HTTP loads

27. Cloud Bursting

28. Controlling IaaS Resources
Partitions
● Logically group IaaS resource locations
● Partitions are important to make application high availability
● Cartridge instances are spawned inside these partitions
● Partitions are defined by DevOps
Network Partitions
● Logical groups of multiple partitions, that are in the same
network.
● Stratos will spawn Load Balancers per network partition.
● Since LB instances and cartridge instances reside in same
network, they can communicate using private IP addresses.
● Used in deployment policies.

29. Smart Policies
Auto Scaling Policy
● Defines threshold values pertaining to scale up/down
decision
● Auto scaler will refer this policies
● Defined by DevOps
● During cartridge subscription user specifies the auto scaling
policy to be used
Deployment Policy
● Defines how and where to spawn cartridge instances
● Defines minimum and maximum instances in a selected
service cluster
● Defined by DevOps based on deployment patterns
● Guarantee SLA of cloud applications

30. More highlights…
● Unified communication
● Centralized monitoring and metering
● Web UI and CLI
● REST API for integration with external PaaS
management interface for both DevOps and user
interaction
● Artifact distribution coordinator
● Persistence volume support for cartridges
● Gracefully shutdown instance when scale down

31. App Factory
Apache License Open Source
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32. Why Stratos?
o Inherently Multi-tenant
o Highly Extensible
o OSGi components, AMQP-based architecture, Policies, IaaS, etc
o Built in Single Sign On/Identity management model
o Policy based
o Supports a simple model of partitions
o Smart Load Balancing
o Non-HTTP Load balancing
o LXC support
o Apache Foundation
o App Factory takes it to the next level
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33. Want to help?
o Feedback and testing
o Creating Cartridges
o Virgo? Birt? Mosquitto? Etc
o Existing apps too (e.g. Drupal, Wordpress, etc)
o Porting to Google Compute
o Autoscaling policies and rules
o Ease of use – creating a Vagrant/LXC distro
o Help with App Factory
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34. Stratos @ Google Summer of Code
6 proposals
o Python Agent
o AWS LB support
o GCE LB support
o New scaling algorithms
o New LB algorithms
o GCE support
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35. Resources
o http://stratos.incubator.apache.org/
o Hangout archives (and future hangouts)
o http://stratos.incubator.apache.org/events/hangouts.html
o Carbon:
o http://www.slideshare.net/wso2.org/introduction-to-the-
wso2-carbon-platform-webinar
o Stratos
o http://www.slideshare.net/lakwarus/overview-of-apache-
stratos-incubation-40-architecture
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36. Questions?