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Running Java and Grails applications on Amazon EC2applications on Amazon EC2
Chris RichardsonAuthor of POJOs in Action
Founder of Cloud Tools and Cloud FoundryyChris Richardson Consulting, Inc
www.chrisrichardson.netwww.chrisrichardson.net
Overall presentation goalp g
Show how to deploy Java and Grails applications on Grails applications on
Amazon Elastic Compute Cloud
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 2
About ChrisAbout Chris• Grew up in England and live in Oakland, CA• Over 20+ years of software development
experience including 12 years of Javaexperience including 12 years of Java• Author of POJOs in Action• Speaker at JavaOne, SpringOne, NFJS,
JavaPolis, Spring Experience, etc.• Chair of the eBIG Java SIG in Oakland • Chair of the eBIG Java SIG in Oakland
(www.ebig.org)• Run the Groovy/Grails meetup
(http://java.meetup.com/161)• Run a consulting and training company that u a co su t g a d t a g co pa y t at
helps organizations reduce development costs and increase effectiveness
• Founder of Cloud Tools, an open-source project for deploying Java applications on Amazon EC2: http://code google com/p/cloudtoolshttp://code.google.com/p/cloudtools
• Founder of a startup that provides outsourced, automated, and Java-centric datacenter management on the cloud: www.cloudfoundry.comy
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 3
Agendag
Amazon-style cloud computingUsing Amazon EC2Deploying on Amazon EC2p y gProgramming with AWS
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 4
Power generationgPast Present
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 5
Computing has come a long wayp g g y
Past PresentPresent
www.computermuseum.org.uk
www.dell.comde co
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 6
Yet we rarely have enough hardwarey g
Can we afford the production hardware? Can we afford the production hardware? Do we know how much to buy?How long does it take to buy and install?Can we afford a test lab?Who is going to set it up and take care
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 7
of it?
Cloud computingp g
A pool of highly scalable, abstracted A pool of highly scalable, abstracted infrastructure that hosts your application, and is billed by
consumptionpBy James Staten of Forrester Research
AND is managed via a web services API
me
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 8
Amazon-Style Cloud Computingy p g
Si l Q S i Si l DBSimple Queue Service (SQS)
Simple DB(name/attribute pairs)
Pay per Elastic Compute Cloud
(EC2)use
services d
( )
Simple Storage Service(S3) Elastic Block Store managed
by Amazon
(S3)
CloudFront
Elastic Block Store(EBS - SAN)
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 9
Amazon(content delivery)
Sign upg p
Login using your Login using your existing Amazon accountSelect the web services you want to services you want to useOnly takes a few minutesB t ti But can sometimes be confusing: various ids, keys, certificates etc
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 10
Make web service calls…<RunInstancesResponse><reservationId>r-60907709</reservationId><ownerId>556666664445</ownerId><ownerId>556666664445</ownerId>…<instancesSet>
<item><instanceId>i-4ef21327</instanceId><imageId>ami-3795705e</imageId><instanceState>
<code>0</code><name>pending</name>
</instanceState>
https://ec2.amazonaws.com?Action=RunInstances&ImageId=ami-3795705e </instanceState>
<placement><availabilityZone>us-east-1b</availabilityZone>
</placement><dnsName/>
/
&MaxCount=1&MinCount=1…
<reason/><keyName>gsg-keypair</keyName><amiLaunchIndex>0</amiLaunchIndex>
</item></instancesSet>
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 11
/</RunInstancesResponse>
… a few minutes later
cer@arrakis ~$ ssh … [email protected] login: Sun Dec 30 18:54:43 2007 from 71.131.29.181[root@domU-12-31-36-00-38-23:~]
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 12
Deploying a web application on EC2p y g pp
Tomcat Server(instance 2)
MySQLDB (Slave)
Web Browser Apache Server
HTTP(S)(instance 2)
MySQL
DB (Slave)(instance 5)
(instance 1) DB (Master)(instance 4)
Tomcat Server(instance 3)
MySQLDB (Slave)(instance 6)
EBS Volume
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 13
S3
Pay per use computingy p p gVirtual Cores
Compute Units
32/64
Memory Storage $/hr**
/core* Bit
Small 1 1 32 bit 1.7G 160G 0.10
High- 2 2 5 32 bit 1 7G 350G 0 20HighCPUMedium
2 2.5 32 bit 1.7G 350G 0.20
Large 2 2 64 bit 7.5G 850G 0.40a g 6 b 5G 850G 0 0
Extra Large
4 2 64 bit 15G 1690G 0.80
High 8 2 5 64 bit 7G 1690G 0 80High-CPU XL
8 2.5 64 bit 7G 1690G 0.80
* EC2 Compute Unit = 1.0-1.2 GHz 2007 Opteron or 2007 Xeon processor
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 14
** Windows more expensive, external bandwidth: $0.10-0.18/Gbyte
Operating systemsp g y
Use Amazon provided Machine Image (AMI)32/64-bit Fedora Core 4/6/832/64 bit Fedora Core 4/6/8Windows Server 2003 ($0.125-$2/hour)Optional SQL Server Standard ($1.10-3.20/hour)3.20/hour)
Many 3rd parties have public AMIsVarious Linux distributionsE g Redhat RightScaleE.g. Redhat, RightScale
Sun provides OpenSolarisBuild your own AMI:
Install applications starting with existing AMI and save new AMICreate an AMI from scratch
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 15
Using AWS in your applicationg y pp
S3 - Store media etc in S3SQS - messaging between loosely coupled componentsSimpleDB – alternative to RDBMSCloudFront – to distribute contentUsing these APIs
Couples your application to AWSCouples your application to AWSBut using them is optional
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 16
Developing on EC2p g
Immediate access to many serversSimplified setupGreat for testingg
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 17
Deploying on Amazon EC2 –startups/small businessesp /
Some VCs require it Get up and running quicklyValidate your business idea without:y
Upfront costs Long-term financial commitmentg
Scale up/down with loadReduces the risk of a success Reduces the risk of a success catastrophe
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 18
Deploying on Amazon EC2 –enterprisesp
No need to wait for corporate ITIn some companies it can take 2 In some companies it can take 2 months to acquire hardwareRequires a long-term financial commitment upfront costscommitment, upfront costs
Use for short-term projects, e.g.Websites for marketing campaignsg p gNew York Times style projects
Use for applications that have fluctuating loads e gfluctuating loads, e.g.
heavily used once a week, once a month
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 19
Example – beer on the cloudp
Grails applicationGrails applicationShort-term marketing marketing campaign siteFluctuating loadFluctuating load
Sat/Sun 4 serversMon-Fri 1 serverMon Fri 1 server
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 20
Agendag
Amazon-style cloud computingUsing Amazon EC2Deploying on Amazon EC2p y gProgramming with AWS
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 21
EC2 API and ToolsAmazon provided CLI tools
CLI equivalents of APIsqAMI creation tools
AWS CLI tools from Tim KayCLI for S3 and EC2Alternatives to Amazon CLI tools
AWS ConsoleVery slicky
ElasticFoxAwesome Firefox pluginLaunch and manage instances
S3 OrganizerFirefox pluginManipulate S3 buckets and objects
…
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 22
AWS Management Consoleg
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 23
Firefox pluginsp gElasticFox
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 24
S3 Organizer
Cloud Tools
Open-source project32 and 64 bit AMIs32 and 64 bit AMIs
Cent OS 5.10Apache/Tomcat/MySQL/JMeter/JetS3t installed
EC2D l f kEC2Deploy frameworkExtensible, object-orientedLaunches instancesConfigures Tomcat, MySQL, ApacheDeploys web applicationsRuns Jmeter tests
•Quicker deployment
Written in GroovyMaven and Grails plugins
Quick and easy deployment to EC2
•More accurate configuration
Quick and easy deployment to EC2
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 25
Maven and Grails pluginsp g
mvn cloudtools:deployp y
grails cloud-tools-deploy OROR
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 26
Extensible provisioning and management platformg p
Built using Domain Driven DesignMain extension points:
New IaaS clouds N i f t t t /New infrastructure components/servers
Implement interfaces or define subclassessubclasses
Define methods for deploy, start, stop, …Write the scripts Write the scripts
Recently added support for Spring dm server and eXo Portal Server
4/6/2009 Copyright (c) 2009. Chris Richardson Consulting Inc. Confidential 27
Cloud Foundryy
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 28
Agendag
Amazon-style cloud computingUsing Amazon EC2Deploying on Amazon EC2p y g
The basicsRunning the web tiergDeploying a databaseHandling securityHigh availability
Programming with AWSg g
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 29
Issues with AWS
Security:
Cloud Computing Survey: IT Leaders See Big Promise, Have Big Security Questions
Security:Runs HIPAA compliant apps BUTLack of PCI complianceDiscomfort with sending gcustomer data to a 3rd party
Technology:Not yet suitable for extremely large relational databaseslarge relational databasesLack of very large machines, e.g. 64G memoryLack of multicast and multiple IP addressesaddresses
Financials:Cost of bandwidthSteady state costs > your own h dhardware
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 30
www.cio.com/article/455832/Cloud_Computing_Survey_IT_Leaders_See_Big_Promise_Have_Big_Security_Questions
Cost issuesRunning larger servers 24 x 7 looks expensive (e.g. $0.80/hr, $560/month)( g $ / , $ / )
BUT when owning your own hardware
Lack of elasticityLong procurement timeMust buy for the estimated peak loadMust buy for the estimated peak loadMust buy redundant hardwareRisk of a success catastrophe
CostElectricity ($0.07-$0.30 / kWh), cooling, spaceSystem administration costsManagement overhead
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 31
Starter website - $$
w w w .acm e.com
EC 2 Instance
E lastic IP A Low cost - $72/month
Elastic - load increases ⇒d i f i tApache
T om cat
expand in a few minutes
Available –instance crashes ⇒replace in a few minutes
M ySQ L
p
EB S V olum e
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 32
Higher capacity website - $$g p y $$
www acme com
Elastic IP
www.acme.com
Low cost - > ~$216/month (1 or more Tomcats, 0 or more Slaves)
Apache
Elastic - load changes ⇒ quickly expand/subtract Tomcats with no downtime
Tomcat Tomcat
Available –instance crashes ⇒replace in a few minutes
MySQL(Master)
EBS Volume
MySql (slave)
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 33
Batch processing architecturep g
e g media transcodinge.g. media transcoding
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 34
Easy upgradesy pg
Clone production environmentMake read-only or turn offSnapshot EBS volumes and create new
lvolumes
Apply upgrades to cloneTest cloneMove elastic IP addresses to cloneTerminate old instances once you are sure that everything works
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 35
Agendag
Amazon-style cloud computingUsing Amazon EC2Deploying on Amazon EC2p y g
The basicsRunning the web tiergDeploying a databaseHandling securityHigh availability
Programming with AWSg g
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 36
No hardware load balancingg
Coming in 2009Use software load balancer
ApacheHAProxy…
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 37
Elastic IP addresses
Instance IP addresses are dynamically allocated on start-upallocated on start up
Does not work well for publicly accessible services, e.g. a website
Elastic IP addresses:Elastic IP addresses:Statically allocated public IP addressesAssociated with your accountAttached to an instance (e g public facing web Attached to an instance (e.g. public facing web server) = it's public IP addressYou configure DNS to resolve to the elastic IP address
Pricing:Non-attached Elastic IP address - $0.01/hour$0 10 per remap (if > 100 in a month)$0.10 per remap (if > 100 in a month)
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 38
Elastic IP address operationsp
Operation Parameters XML document
DescribeAddresses PublicIp.n (optional) List of IP addresses and associated instance idinstance id
AllocateAddress - Public IP address
Release Address Public Ip address -
AssociateAddress InstanceId Public IP AssociateAddress InstanceId, Public IP Address
-
DisasssociateAddress Public IP Address -DisasssociateAddress Public IP Address
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 39
Agendag
Amazon-style cloud computingUsing Amazon EC2Deploying on Amazon EC2p y g
The basicsRunning the web tiergDeploying a databaseHandling securityHigh availability
Programming with AWSg g
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 40
Elastic Block Storageg
Local storage is ephemeralM t bl t lMountable storage volumes
"On-demand SAN"Size: 1 GB to 1 TBSize: 1 GB to 1 TBMount on a single instance
Create snapshotspStored in S3Create new volumes from the snapshot
CCost:$0.10/GByte/month$0 10 per 1 million I/O requests$0.10 per 1 million I/O requests
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 41
Using EBS Volumesg
AWS:CreateVolume Size=50G
mkfs xfs /dev/sdh
CreateVolume Size=50GAttachVolume InstanceId=… Device=/dev/sdh
mkfs.xfs /dev/sdhecho "/dev/sdh /vol xfs noatime 0 0" >> /etc/fstabmkdir /volmount /volmount /volmkdir /vol/lib /vol/logmv /var/lib/mysql /vol/lib
[mysql.server]user=mysqlbasedir /vol/lib
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 42
basedir=/vol/lib
Backing up your databaseg p y
mysqldump --add-drop-database --databases foo | gzip > backup.sql.gznow=`date +%d%m%y_%H%M`aws put $bucket/${object}_${now}.sql.gz backup.sql.gzaws copy $bucket/${object}_latest $bucket/${object}_${now}.sql.gz
FLUSH TABLES WITH READ LOCKSHOW MASTER STATUS
xfs_freeze -f /vol
# AWS WS: CreateSnapshot
xfs freeze -u /volxfs_freeze u /vol
UNLOCK TABLES
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 43
Agendag
Amazon-style cloud computingUsing Amazon EC2Deploying on Amazon EC2p y g
The basicsRunning the web tiergDeploying a databaseHandling securityHigh availability
Programming with AWSg g
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 44
Security benefits of cloud computingp g
Leverages the world class security techniques of amazon.comCloud infrastructure enables:
Unlimited loggingAbility to test changes on a cloneClone servers and volumes for forensic analysis
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 45
The usual security best practicesy p
Turn off unused servicesFile ownership and permissionsDisabling password based ssh loging p gStandard Linux, Apache, Tomcat and MySQL best practicesy Q p
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 46
Network securityy
Cannot sniff traffic for other instancesUse EC2 firewall – aka. security groupsConsider encrypting network trafficLimit SSH access to only your locationy y
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 47
Security Groupsy pNamed set of firewall rules associated with your accountAn instance
Belongs to one or more security groupsDefaults to “default” security groupg
Permits inbound trafficProtocol: tcp, udpRange of ports
?Action=RunInstances&SecurityGroup.1=g1&SecurityGroup.2=g2
From:Anywhere – specific port rangeAn IP address (range) – specific port rangeAnother group - all ports
Common usagePort 80 (http)/443 (https) – anywhere
When you first signup don’t forget to enable
ffPort 22 (ssh) – just from your location
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 48
SSH traffic
Using security groupsg y g p
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 49
Use a software firewall
E.g. iptablesIn addition to security groups
Security Group: Tomcat Servers are only accessible from Apache Serveriptables: Tomcat servers only allow port 22 and po t 8009 (AJP)22 and port 8009 (AJP)
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 50
Storage securityg y
Amazon wipes disks so one customer cannot see another’s dataBut
You don’t know where it isAmazon could be subpoena’d
Consider encrypting dataEncrypted file systemsEncrypting sensitive data in DBEncrypting backups in S3
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 51
Agendag
Amazon-style cloud computingUsing Amazon EC2Deploying on Amazon EC2p y g
The basicsRunning the web tiergDeploying a databaseHandling securityHigh availability
Programming with AWSg g
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 52
Deploying highly available applicationspp
AWS has had very well publicized outages
BUT…Is internal IT really any better?In reality: AWS is (more) reliabley ( )Don’t forget:
You are not responsible for the hardwareYou are not responsible for the hardwareInstance fails ⇒ Launch a new one in a few minutes
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 53
But once in a blue moonFrom: Amazon EC2 Notification [email protected]: Notice: Degraded Amazon EC2 InstanceTo: XXXXX@yahoo comTo: [email protected]: Friday, January 23, 2009, 5:54 AMHello,
We have noticed that one or more of your instances are running on a hostdegraded due to hardware failuredegraded due to hardware failure.
i-5e0b8b34
The risk of your instances failing is increased at this point. We cannotdetermine the health of any applications running on the instances. We recommendthat you launch replacement instances and start migrating to them.
Feel free to terminate the instances with the ec2-terminate-instance API whenyou are done with them.
Let us know if you have any questionsLet us know if you have any questions.
Sincerely,
The Amazon EC2 Team
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 54
Can't migrate internal IP addressesg
Instance has one fixed, internal IP addressaddressUsing Elastic IP = $
ThereforeThereforeHandling active/standby failover is difficult:
E.g. Cannot migrate IP address of failed database to standby database
Have your own host namesHave your own host namesUpdate /etc/hostsRun DNS server
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 55
No multicast for resource discoveryy
Prevents the use of standard clustered resource discovery
E.g. JGroups etc
Use a registry: DatabaseSimpleDBSecurity groups…
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 56
Regions and availability zonesg y
By default, your database By default, your database master and slave could run on the same physical host!Regions - geographically dispersed locations
us-east-1
eu-west-1p
Availability zone -engineered to be insulated from failure in other zonesSpecify availability zone
us-east-1a, eu-
west-1ap y ywhen launching instancesSLA with 99.95% availability with multiple availability zones
us-east-1b
west 1a
You pay for inter-zone network traffic us-east-
1c
eu-west-1b
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 57
Amazon EC2 SLA*
99.95% availability if you are using >1 availability zoneAvailability
Instances have external connectivityYou can launch new instances
Service credit for not meeting SLA
* Read the small print
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 58
Regions and Availability Zones APIg y
Operation Parameters XML document
DescribeRegions Region.n (optional) List of region names and urls
DescribeAvailabilityZones ZoneName n List of availability zones DescribeAvailabilityZones ZoneName.n List of availability zones and state
https://<region>.ec2.amazonaws.com?Action=RunInstances&Placement.AvailabilityZone=<availabilityZone>
https://ec2.amazonaws.com?Action=RunInstances&Placement AvailabilityZone <availabilityZone>
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 59
&Placement.AvailabilityZone=<availabilityZone>
Highly available - $$$g y $$$
www.acme.com Higher cost - > ~$
Availability Zone A Availability Zone B
Elastic IP A Elastic IP B
Higher cost > $ 360/month (2 Apaches, 2 MySqls, 1 or more Tomcats, 0 or more Slaves)
El ti l d h
Apache Apache
Elastic - load changes ⇒quickly expand/subtract Tomcats with no downtime
Available – No SPOF, instance
TomcatTomcat Tomcat
Tomcat
,crashes ⇒ replace in a few minutes
MySQL(Master 1)
MySQL(Master 2)
EBS Volume EBS Volume
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 60
EBS Volume
Agendag
Amazon-style cloud computingUsing Amazon EC2Deploying on Amazon EC2p y gProgramming with AWS
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 61
Using AWS in your applicationg y ppAccess instance meta dataSimple Storage Service (S3)Simple Storage Service (S3)
Stores blobs of dataEg. Photo sharing websiteStore mediaHand out URLs to S3 objects
Simple Queue Service (SQS)Hosted queue-based messaging systemq g g yAlternative to JMSLoosely coupling between systems
SimpleDBSchema-less non-relational databaseStore data setsExecute queries
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 62
Eventual consistencyy
AWS is distributedData is replicated among many nodesData is replicated among many nodesReplication takes timeUpdates eventually appear
Why?CAP theorem by BrewerPick two: consistency, availability, Pick two: consistency, availability, partitioning
Example:S3 a GET might not see a PUTS3 – a GET might not see a PUTSQS – reading from a queue might not retrieve recently added messages…
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 63
Instance meta data
Instance can find out:f b lfInformation about itself
User data supplied by user at launch timeEnables a generic AMI to customize itself gdynamicallyAvailable data includes:
user-datauser datasecurity-groupspublic-hostnameplacement/availability-zoneplacement/availability zone…
curl http://169.254.169.254/2008-12-01/meta-data/<<data type>>
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 64
Amazon Simple Storage Service (S3)p g ( )
Flat storage model consisting of buckets and objectsand objectsBucket
has a name e g <AccessKey> <name>has a name, e.g. <AccessKey>.<name>contains objects
Objects jHas a key, e.g. mypicture.jpgStores 1 byte - 5G
Si l ti hi hi l fil tSimulating a hierarchical file-systemObject key can look like a path ☺presentations/february09/aws pptpresentations/february09/aws.ppt
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 65
S3 REST API
PUT / HTTP/1.1Create a bucket
PUT /<ObjectName> HTTP/1 1
Host: <BucketName>.s3.amazonaws.com …
Create a bucket
PUT /<ObjectName> HTTP/1.1Host: <BucketName>.s3.amazonaws.com ……Bytes…
Create an item in a bucket
GET /<ObjectName> HTTP/1.1Host: <BucketName>.s3.amazonaws.com … Download an item
DELETE /<ObjectName> HTTP/1.1Host: <BucketName>.s3.amazonaws.com
Delete an item
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 66
… Delete an item
Amazon CloudFront
Content delivery networkOriginal content stored in S3 bucketRegister publically accessible bucket
ith Cl dF t i d i with CloudFront ⇒ unique domain name (foo1234.cloudfront.net)Content accessed through that Content accessed through that domain name is delivered by geographically distributed edge geographically distributed edge servers
http:// foo1234.cloudfront.net/i/bar.jpg k / /b⇒ <BucketName>/i/bar.jpg
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 67
SimpleDB modelp
DomainHas a nameContains items
id description color
123 jeans blue, black
Item:Has a name
456 shoes red, white
Has one or more attributes
Attribute:Has a nameHas one or more values
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 68
Simple DB modelpIt’s not a relational database
No joinsEventual consistency - updates eventually appearNo transactions – single item updateNo locking
LimitsLimits100 domains per account250,000,000 attribute name-value pairs per domain256 attribute name-value pairs per itemQueries return …
Pricing:Machine utilization: $0 14/hour after first 25 free Machine utilization: $0.14/hour after first 25 free hours/monthFees for data transfer in and out (Free for access from EC2)
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 69
SimpleDB Operationsp pSOAP and REST APIDomains: Create/List/DeleteDomains: Create/List/DeletePutAttributes
DomainNameAttributeNameAttributeNameAttribute.N.Name/Attribute.N.ValueAttribute.N.Replace – add or replace
DeleteAttributesDomainNameAttributeNameAttribute.N.Name/Attribute.N.Value
GetAttributesDomainNameAttributeName.n
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 70
SimpleDB Select queriesp q
“SQL-like” Select query languageVarious limitations
Sort by attribute must appear in where clause and select list…
select * Select operation
SelectExpression
select * from domainNamewhere SomeAttribute > 2order by SomeAttributelimit 10
NextTokenlimit 10
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 71
SimpleDB custom queriesp q
Query[‘SomeAttribute’ > 2]
DomainQueryExpresssion
[ SomeAttribute > 2] sort ‘SomeAttribute’
Pagination with: MaxNumberOfItems/NextTokenR t It NReturns ItemNames
QueryWithAttributesAdd A ib N ( i l)Adds AttributeName.n (optional)Returns values
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 72
Using SimpleDBg pReplace joins by denormalizing/duplicating data
E.g. Duplicate child data in parent in parent-child l i hirelationship
E.g. http://blog.adaptiveblue.com/?p=1145People-Interaction-Thing (1-N N-1)Store Interaction in People and in ThingStore Interaction in People and in Thing
Parallelize SimpleDB requestsAn application should/could issue multiple requests in parallel
d l l dPartition data across multiple domainsE.g. People1, People2Improves performance
Use SimpleDB when:Use SimpleDB when:You can tolerate inconsistenciesYou don’t need transactionsi.e. bad for banking but good for social network, read i t i d tintensive data
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 73
Amazon SQSQQueues:
As many as you wantUnlimited sizeMessages deleted after 4 daysAWS might delete queues that are idle for > 30 daysMessage are to 8Kb (store binary and larger messages in Message are to 8Kb (store binary and larger messages in S3 or SimpleDB)
Semantics of distributed queuingOrder is not guaranteed
lAt-least onceReceiveMessage returns messages from a subset of servers, e.g. possibly no messages
Pricing:g$0.000001 per Request$0.100 per GB – all data transfer in$0.170-0.100 per GB – data transfer out
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 74
SQS API detailsQSOAP API onlyManaging queriesManaging queries
Create/List/Delete QueuesSending a Message
SendMessageSendMessageProcessing a message
ReceiveMessageDeleteMessagee ete essageVisibility timeout: a received message that is not deleted within the timeout will reappear
Queue attributesSetQueueAttributes/GetQueueAttributesApproximateNumberOfMessagesVisibilityTimeout
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 75
Java libraries for AWS
JetS3tJetS3tRich API for accessing S3jets3t.dev.java.net/j j
TypicaAPI for SQS, EC2, SimpleDBcode.google.com/p/typica
SimpleJPASubset of JPA on Subset of JPA on Simple DBcode.google.com/p/simplejpa
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 76
Summaryy
Amazon-style cloud computing providesImmediate access to a scalable infrastructureP f t Pay as you go – no upfront investment/commitment requiredEasily scale up/downEasily scale up/downOptional AWS services
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 77
Final thoughtsg
Download or contribute to Cloud Tools today :y
www.cloudtools.org
Checkout Cloud Foundry:
www cloudfoundry comwww.cloudfoundry.com
Buy my book ☺
Send email:
Visit my website:
www.chrisrichardson.net
Talk to me about consulting and training
Phone: 510 904 9832
Copyright (c) 2009 Chris Richardson. All rights reserved. Slide 78