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Framework Integration in
Cloud Foundry
Ramnivas Laddad
@ramnivas
© 2012 VMware, Inc. All rights reserved

2.
@ramnivas
 Spring framework committer
 Cloud Foundry committer
 Main interests
• Cloud computing
• Aspect-oriented programming
• Scala and functional programming
 Author of books and articles
• AspectJ in Action (1st and 2nd edition)
 Speaker at many professional conferences
• JavaOne, JavaPolis, SpringOne, Software Development, No Fluff Just Stuff,
EclipseCon, O’Reilly OSCON etc.
 Active involvement in AspectJ, Spring, and Cloud Foundry
since their early form
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Technologies “Я” Us
Closure Java
AMQP HTML5 Akka
Mongo Spring Scala
Redis JSF Grails
Hibernate node.js
RabbitMQ JDBC
Lift
Rails
JMS Ruby
Hadoop Sinatra
Batch Job Django
JTA Python
MySQL Web Services
JPA Caching LDAP
Postgres Scripting
Testing Security
Neo4j REST
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Technologies “Я” Us
Access logs Network
Routing
Hardware failures DNS
Storage
Load balancing
Auditing Rolling Updates
User management
Security DoS
Backups DBA
OS Monitoring
Patches
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Facets of complexity: Product
 More functionality
 Time to market pressure
 Complex integration
 Higher stake in quality
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Facets of complexity: Development
 Sound architecture: future proofing without overdoing
 Unit and integration tests
 Responding to changing business needs
 Confusing technology landscape
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Facets of complexity: Deployment and
operation
 Choosing the right hardware, operating system, web server
 Monitoring applications
 Responding to scalability needs
 Dealing with hardware- and system-level failures
 Upgrading without substantial down time
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Inherent vs. Apparent Complexity
What can we do
about this?
Implementation overhead
Apparent
Implementation complexity
Inherent
Functional logic complexity
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What can we do?
?
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10.
Three layers of Cloud Computing
SaaS
Software as a Service
PaaS
Platform as a Service
IaaS
Infrastructure as a
Service
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Cloud Foundry open PaaS - Choice of clouds
Data
Services
Private
Clouds
Msg Public
Services
Clouds
Other
Micro
Services
Clouds
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12.
Cloud Foundry open PaaS - Choice of clouds
Data
Services
Private
Clouds Partners
Msg Public
Services
Clouds
Other
Micro
Services
Clouds
Apache2 license
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Frameworks in Cloud Foundry
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The Cloud Foundry Universe
Core Frameworks
Community and Partner contributions
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Core Runtimes and Frameworks
 Java
• Spring
• Grails
• Lift
 Ruby
• Rails
• Sinatra
• Rack
 Node.js (Community lead: Joyent)
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Community and partners contributions
 Python
• Django
• WSGI
 Erlang OTP/Rebar
 PHP
 Perl
 .Net
• On Iron Foundry
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The Platinum Rule
Treat each framework
the way it will like to be treated!
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Common Framework Support
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Command-line access
 Create apps and services
 Update bindings, memory etc.
 Scale instances
$ vmc push conference
$ vmc create-service mysql conf-db
$ vmc bind-service conf-db conference
$ vmc instances conference +2
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Access to services and app info
 Access to services and app info through environment variables
• Service host, port, credentials
• App ip and port
VCAP_SERVICES: {
"postgresql-9.0": [{
"name": "env-postgresql",
"label": "postgresql-9.0",
"plan": "free",
"credentials": {
"name": "de24667f9344b4eeaad6b5a2326d52faa",
"host": "172.30.48.122",
"port": 5432,
"user": "u50ce600bba434bacbc99e034bb415644",
"password": "pf4dca5bd449d4732841f0c4ae3f299d0"
}
}]
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Simplified app configration
 A runtime library to access service and app info
 Auto-reconfiguration for typical apps
• Node.js coming soon
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Access to service through Caldecott
$ vmc tunnel conf-db
Binding Service [conf-db]: OK
Stopping Application 'caldecott': OK
Staging Application 'caldecott': OK
Starting Application 'caldecott': OK
Getting tunnel connection info: OK
Service connection info:
username : uG5jVXaBPmjl6
password : pE3HOwIwGgkbv
name : d76e62447a4c04f2b8e7b79f41c450aa0
Starting tunnel to conf-db on port 10000.
1: none
2: mysql
3: mysqldump
Which client would you like to start?: 2
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Access to service through Caldecott
Launching 'mysql --protocol=TCP --host=localhost --port=10000
--user=uG5jVXaBPmjl6
--password=pE3HOwIwGgkbv
d76e62447a4c04f2b8e7b79f41c450aa0'
...
mysql> select * from users;
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Manifest Support
---
applications:
.:
name: conference
url: ${name}.${target-base}
framework:
name: rails3
info:
mem: 256M
description: Rails Application
exec:
mem: 256M
instances: 1
services:
conf-db:
type: mysql
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25.
Spring
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The Platinum Rule: Spring and Grails
 IDE integration
• SpringSource Tools Suite and Eclipse
• Open source
 Auto-reconfiguration by hooking into Spring application context
 <cloud:> namespace
 Spring 3.1 profile support
 Maven plugin
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IDE Integration
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Auto-Reconfiguration: Relational DB
 Detects beans of type javax.sql.DataSource
 Connects to MySQL or PostgreSQL services
• Specifies driver, url, username, password, validation query
 Creates Commons DBCP or Tomcat DataSource
<bean class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close" id="dataSource">
<property name="driverClassName" value="org.h2.Driver" />
<property name="url" value="jdbc:h2:mem:" />
<property name="username" value="sa" />
<property name="password" value="" />
</bean>
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<cloud:service-scan>
 Scans all services bound to the application and creates a bean of
an appropriate type for each
• Same bean types as auto-reconfiguration
 Useful during early development phases
<beans …>
<cloud:service-scan/>
</beans>
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<cloud:service-scan> Autowire Dependencies
 Created beans can be autowired as dependencies
 Use @Qualifier with service name if multiple services of same type
bound to app
@Autowired(required=false) private ConnectionFactory rabbitConnectionFactory;
@Autowired private RedisConnectionFactory redisConnectionFactory;
@Autowired @Qualifier("test_mysql_database")
private DataSource mysqlDataSource;
@Autowired(required=false) @Qualifier("test_postgres_database")
private DataSource postgresDataSource;
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<cloud:data-source>
 Configures a DataSource bean
• Commons DBCP or Tomcat DataSource
 Basic attributes:
• id: defaults to service name
• service-name: only needed if you have multiple relational database
services bound to the app
<cloud:data-source id="dataSource"/>
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Isolating Cloud Foundry Configuration
<bean class="org.sf.orm.jpa.LocalContainerEntityManagerFactoryBean"
id="entityManagerFactory">
<property name="dataSource" ref="dataSource"/>
</bean>
<beans profile="cloud">
<cloud:data-source id="dataSource" />
</beans>
<beans profile="default">
<bean class=”o.a.commons.dbcp.BasicDataSource" id="dataSource">
<property name="url" value="jdbc:mysql://localhost/inventory" />
</bean>
</beans> CONFIDENTIAL
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Scala/Lift
 Auto-reconfiguration for Scala Lift apps
 PostgreSQL support coming soon
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Ruby
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The Platinum Rule: Rails, Sinatra, Rack
 Bundle support
• Just include a Gemfile.lock
 Rails console
• Debugging
 Auto-reconfiguration through meta-programming
 cf-runtime gem
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Rails Console
$ vmc rails-console conf
Connecting to 'conf' console: OK
irb():001:0> u = User.find_by_email('ramnivas@ramnivas.com')
=> #<User id: 1, email: "ramnivas@ramnivas.com", reason: "It is cool!",
created_at: "2012-03-29 23:10:34", updated_at: "2012-03-29 23:10:34">
irb():002:0> u.email = "rladdad@vmware.com"
=> "rladdad@vmware.com"
irb():003:0> u.save
=> true
irb():004:0> u = User.find_by_email('rladdad@vmware.com')
=> #<User id: 1, email: "rladdad@vmware.com", reason: "It is cool!",
created_at: "2012-03-29 23:10:34", updated_at: "2012-03-29 23:14:17">
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Ruby auto-reconfiguration
require 'mongo'
module Demo
class App < Sinatra::Base
configure do
mongo = Mongo::Connection.new(:host => '127.0.0.1',
:port => 27017)
db = mongo['db']
end
...
end
end
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cf-runtime: Ruby Runtime Gem
require 'cfruntime/mongodb'
connection =
CFRuntime::MongoClient.create_from_svc('docs')
db = connection.db
...
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Running locally and in Cloud Foundry
require 'cfruntime/mongodb'
...
db = CFRuntime::MongoClient.create.db
rescue Mongo::Connection.new("localhost",
27017)
.db("db”)
...
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Taking full control
if CFRuntime::CloudApp.running_in_cloud?
@service_props = CFRuntime::CloudApp.service_props('docs’)
else
@service_props = {}
@service_props[:host] = 'localhost'
@service_props[:port] = 27017
@service_props[:db] = 'testdb'
end
db = Mongo::Connection.new(@service_props[:host],
@service_props[:port])
.db(@service_props[:db])
if CFRuntime::CloudApp.running_in_cloud?
db.authenticate(@service_props[:username],
@service_props[:password])
end
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Node.js
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The Platinum Rule: Node.js
 NPM support
• Coming soon!
 Debugging using node-inspector
 Auto-reconfiguration and runtime package
• Coming soon!
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Debugging node.js apps
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Auto-reconfiguration in node.js
var host = 'localhost',
port = 3000,
url = require('url');
var client = require("redis").createClient();
require('http').createServer(function (req, res) {
...
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Accessing apps and services info
var cfruntime = require('cfruntime'),
host = cfruntime.CloudApp.host || 'localhost',
port = cfruntime.CloudApp.port || 3000,
url = require('url');
if (cfruntime.CloudApp.runningInCloud) {
var client = cfruntime.RedisClient.create();
} else {
var client = require("redis").createClient();
}
require('http').createServer(function (req, res) {
...
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46.
Peeking into future
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47.
Standalone apps
 Bring your own container
• Jetty
• Netty
•…
 Non-web apps
• Resque workers
• Spring Batch
• Spring Integration
 Still to come
• Short-running apps
• Scheduled tasks
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Enhanced Scala Support
 Lift updated support
 Play!
 Akka
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Improved Tools
 Revamped vmc
• Embeddable core
• Scripting friendly
• Even more intuitive user interaction
 Eclipse plugin
• Enhanced wizard with service requirement detection
• Manifest support
• Caldecott integration
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50.
Questions?
Ramnivas Laddad
@ramnivas
© 2012 VMware, Inc. All rights reserved