symfony in the cloud
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Symfony in the CloudKris Wallsmith
February 17, 2010
Wednesday, February 17, 2010
Kris Wallsmith
• Freelance web developer, consultant, training, audits...
• 10 years using PHP
• 3 years using symfony
• Author of (too) many plugins
• 1 year on symfony core team
• JavaScript (moo)
• @kriswallsmith
• CTO of Nebul.us
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What is Nebul.us ?
• Nebul.us is a vibrant and visual life aggregator. In real time you can seewhat your friends and the public are sharing and discovering online!
• Passively share what you’re doing online
• Show don’t tell
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• Symfony Framework
• Doctrine ORM
• Zend Framework
• Swift mailer
• and more…
What is Nebul.us really?
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• Web site
• XML services (Flash and Atom)
• JSON services (browser plugins)
• Up to 12 requests per minute when browsing
What is Nebul.us really?
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Prototype
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HTTP
PHP
MySQ
L
Uploads
ServerGrove VPSSessions
Local Filesystem
Prototype
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What is “The Cloud”?
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I don’t know.
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What is “The Cloud”?
• Adds a (big) black box to your stack
• Several virtualized resources
• Scale based on the level of traffic
• Pay only for what you use
• Elastic!
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It’s cloudy out there
• Amazon
• Rackspace
• Microsoft
• Rightscale
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Production
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Production
HTTP
PHP
MySQ
L
Uploads
ServerGrove VPSSessions
Local Filesystem
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Production
HTTP
PHP
MySQ
L
Uploads
ServerGrove VPSSessions
Local Filesystem
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No really, it’s that easy.
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Writing a scalablesymfony application
Kris Wallsmith
February 17, 2010
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Upgrade Points
• Database connections
• File uploads
• Session storage
• Local development
• Deploying
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Database Connections
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Database Connections
• Typical database configuration
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Database Connections
• One writable “master” connection
• One or more read-only “slave” connections
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Managing Connections
• Organize read and write connections using a naming convention
• Choose a random read connection
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Extend the Doctrine ORM
• Use the appropriate connection
• Doctrine_Query
• Doctrine_Record
• Doctrine_Collection
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Configure Doctrine
• Set custom query and collection class attributes in manager
• Set custom record class in builder options
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Using the Doctrine DBAL
• Doctrine_Manager::connection()
• $table->getConnection()
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Using the Doctrine DBAL
• Doctrine_Manager::getInstance() ->getConnection('master')
• $context->getDatabaseManager() ->getDatabase('master') ->getDoctrineConnection()
• $configuration ->getWriteConnection()
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How do we test this?
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Connection Listener
• Listen to every connection
• Compare type of query to type of connection
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Connection Listener
• Add connection listener to debugmode and test suite
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Multiple Connections
• Configure multiple connections to the same database
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Do you want it?Introducing sfDoctrineMasterSlavePlugin
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File Uploads
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File Uploads
• Typical upload form
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View Layer
• Render the uploaded image
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Amazon S3 Integration
• Must handle file uploads
• Must integrate with the view layer
• Must be disable-able
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Stream Wrapper
• Zend Amazon S3 stream wrapper
• s3://mybucket/image.jpg
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Read / write paths
• Configure read and write upload paths
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Configure Amazon S3
• Toggle integration on/off
• Environment buckets
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Configure File Uploads
• Upload to the write directory
• Custom validated file class
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Amazon S3 ACL
• ACL defaults to private
• Extend and change to public-read
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Pssst,
Matthew
...
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View Layer
• Nothing magic
• Custom helper function that uses the configured upload read path
• Search and replace…
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Session Storage
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Session Storage
• Default factories configuration
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Session Storage
• Store session data in the database
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Database Session Storage
• Migrate the database
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Local Development
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Local Development
• One database
• Save uploads to the local filesystem
• Present correct upload path in view layer
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Deploying
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Deploying
• Subversion
• svn update
• svn checkout + symlink
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Deploy with svn update
1. Disable
2. Update the working copy
3. Rebuild model files
4. Migrate the database
5. Enable
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Deploy with svn checkout
1. Checkout a fresh working copy
2. Setup files not in the repository
3. Build model files
4. Disable current working copy
5. Migrate the database
6. Update symlink
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Deploy with svn update
1. Disable
2. Update the working copy
3. Build model files
4. Migrate the database
5. Enable
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Deploy with svn checkout
1. Checkout a fresh working copy
2. Setup files not in the repository
3. Build model files
4. Disable current working copy
5. Migrate the database
6. Symlink the new working copy
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Deployment Strategies
• svn update
• fewer steps
• svn checkout + symlink
• less downtime
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Automated Deployment
• Rightscale API
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Questions?
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