This document discusses how GlassFish can be used as a Platform as a Service (PaaS) provider. It outlines how GlassFish can manage infrastructure services through an IaaS management service, orchestrate the provisioning and binding of services, and provide elasticity through auto-scaling of resources based on metrics. Key capabilities of GlassFish as a PaaS include one-step deployment and undeployment of Java applications along with their dependencies, and self-shaping of clusters based on application needs and statistics.

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2. The following is intended to outline our general product direction. It
is intended for information purposes only, and may not be
incorporated into any contract. It is not a commitment to deliver any
material, code, or functionality, and should not be relied upon in
making purchasing decisions. The development, release, and timing
of any features or functionality described for Oracle s products
remains at the sole discretion of Oracle.
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3. GlassFish in the Virtual World
How GlassFish turns into a PAAS provider
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4. Agenda
• Introduction
• PaaS
• GlassFish as a PaaS provider
• IaaS Management Service
• Orchestration
• Elasticity
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5. Development and Deployment Timeline
Requirements Development Hardware procurement Application Installation
t0 t1 t2 t3
Prototyping Testing Hardware installation Certification
The I.T. rift
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6. Introduction
([I|P|S]aas)
Multi-tenant Java EE
SAAS application
Mutil-Services
Java EE instances
PAAS and Resources Elasticity
Isolation
Virtualization,
IAAS
Storage, Network
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7. Application Installation
• Install Java EE application server on all hardware
• Create a dedicated (static) cluster of Java EE server
instances
• Map incoming traffic to Java EE server instances
• Resolve cluster dependencies (MQ, Database)
• Change Java EE application runtime descriptor to map to
the deployment cluster (optional)
• Deploy the application
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8. Agenda
• Introduction
• PaaS
• GlassFish as a PaaS provider
• IaaS Management Service
• Orchestration
• Elasticity
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9. PaaS to the rescue
• I.T. departments can offer usual services through a private
PaaS :
– No delay
– Secure
– Maximize hardware utilization
– Monitoring
• Developers
– Faster time to market.
– Easier deployment facilities
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10. What does PaaS mean for Java EE
• One Step deployment :
– Multi-services interdependencies resolution
– Cluster of Java EE server instances procurement
– Cluster elasticity :
• Metrics provided by application
• Application Server metrics (response time, etc..)
• Virtual Machine information (CPU, Memory usages)
• And one step un-deployment…
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11. Agenda
• Introduction
• PaaS
• GlassFish as a PaaS provider
• IaaS Management Service
• Orchestration
• Elasticity
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12. Requirements on GlassFish
• Capable of creating/starting/stopping/deleting Virtual
Machines
• Capable of monitoring Virtual Machines
• Capable of self-shaping the cluster based on statistics
• Understands service definitions
• Understands service references
• Bind references to definitions using virtual machines
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13. GlassFish in the Cloud
Monitor
Service deployed
Discovery Applications
Orchestration Elasticity Management
Engine Service
Service Adjust cluster
Association shape
Service Provisioning
Engine
Hypervisor
Abstraction
Iaas Management Template
Template Service Management
matching
Cloud
Resources
Configuration
Versioning
VirtualBox
OVM Plugin KVM Plugin
plugin
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14. GlassFish as a PaaS Provider
Timeline
Application Virtual Cluster
Association Deployment
introspection Creation
Virtual Machine Virtual Machine
With Load with Database
Balancer service
Virtual Machine
with Java EE
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15. Agenda
• Introduction
• PaaS
• GlassFish as a PaaS provider
• IaaS Management Service
• Orchestration
• Elasticity
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16. IMS Architecture
Common
Common CLIs
configuration
Service
Provisioning virt-core
Engine
KVM specific
configuration
VirtualBox KVM Specific
OVM Plugin KVM Plugin CLIs
plugin
Libvirt interface
layer
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17. Three virtualization implementations
• Laptop mode
– Runs processes on the bare metal operating system.
– All service types supported (not all variations)
• Local mode
– Locally installed hypervisor
– Best fidelity to deployment scenario
• Remote mode
– Connects to remote hypervisors
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18. Hypervisor plugin
Hypervisor
Local
Mode
Remote
Mode
Laptop
mode
Yes
Soon
KVM
Yes
Yes
Xen
Yes
Yes
VirtualBox
Yes
No
OVM
Yes
Yes
Vmware
Yes
Yes
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19. Topology
IaaS Management
Service
Server Pool Server Pool
Server Pool
Europe Asia
Oracle
Enterprise
IaaS
Provider
Oracle
VM
Machines
in
Machines
in
Manager
(Amazon)
Manager
Machines
in
U.K.
France
Germany
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20. Agenda
• Introduction
• PaaS
• GlassFish as a PaaS provider
• IaaS Management Service
• Orchestration
• Elasticity
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21. Services
• It’s all about Services, how to provide them, how to resolve
them and eventually how to inject them.
– Provisioned
• Application Scoped
• Global/Shared
– External
• Service Metadata
– Service Definition
– Service Reference (implicit and explicit)
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22. Service Reference
• glassfish-services.xml
– Explicit Service References definition
• Target template
• Characteristics matching
• Will be replaced with Java EE standard XML
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23. Service Reference Example
<glassfish-services>
<service-description name="MyDB”>
<!-- Based on the characteristics specified below, the Orchestrator would match
to a Template in the Template Repository and provision that Service -->
<characteristics>
<characteristic name="service-type" value="Database"/>
<characteristic name="service-vendor" value="Oracle"/>
<characteristic name="service-product-name" value="Oracle"/>
<characteristic name="service-version" value="11g"/>
<characteristic name="os-name" value="Linux"/>
</characteristics>
<configurations>
<!-- Create initial schema -->
<configuration name="init.sql" value="tbl-init.sql"/>
</configurations>
</service-description>
</glassfish-services>
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24. PaaS Application Deployment
Service Reference Message Queue Configure Application LoadBalancer
Extraction Service with procured services
references
Provision and Initialize Provision and Initialize
Deployment
Pipeline
Provision and Initialize Provision and Initialize Deploy application
Database Service Java EE Service
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25. Redeployment
• Reuse existing services/cluster of Java EE instances
• Adapt shape to new application requirements
• Data migration
– Database schema upgrade
– Security
• Rolling upgrades still apply
• Lower stack software update (O.S. / Database)
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26. Undeployment
• Rule of thumb : undo what was done during deployment
• Application scoped services stopped and released
• Shared services released
• Cluster of Java EE instances deleted
• Virtual Machines released
• Virtual Disks deleted
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27. Agenda
• Introduction
• PaaS
• GlassFish as a PaaS provider
• IaaS Management Service
• Orchestration
• Elasticity
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28. How to Determine when to Autoscale
• Monitor Resources used by the system
– CPU
• Used and idle CPU times
– Memory
• Process memory: Allocated, Resident etc.
• JVM memory: Used, Committed and Max memory
– Disk
• Reads, Writes per seconds
• Bytes read, written etc.
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29. How to Determine when to Autoscale
– Java Objects
• HTTP Sessions created / destroyed per second
• Number of HTTP requests that arrived
• Connection Pools: Number of connections acquired / released etc.
• Database Queries executed
• Transaction status: Number of commits / rollbacks
– Application Specific Metrics
• Response time of a specific URL
– Many, many, many other metrics…
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30. Metric Sources
• JMX
– Example MXBean to gather memory statistics
– Operating environment may have JMX MBeans that provide some
metrics
• Monitoring tools
– Virtual Machine Manager can provide cpu / memory usage metric
• Native tools
– Top, lsof, iostat etc.
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31. Want to try ?
• Source code and builds
– http://glassfish.java.net/
• The aquarium
– http://blogs.oracle.com/theaquarium/
• The specs
– http://javaee-spec.java.net/
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32. Latin America 2011
December 6–8, 2011
Tokyo 2012
April 4–6, 2012
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