High-Availability Websites and Web Applications with AWS

High Availability Websites Matt Wood T E C H N O L O G Y E VA N G E L I S T

AGENDA High Performance Websites: Part 11. Availability2. Static content3. Multi-tier applications4 . Per formance boost5. Summar y

Spectrum of websites

Static DynamicSpectrum of websites

Static DynamicSimple Complex Spectrum of websites

Static DynamicSimple ComplexNiche Mass market Spectrum of websites

Availability is important

Support your customers

Support your business

However...

“Everything fails all the time ” Werner Vogels, Amazon CTO

Infrastructure services cansave the day

Focus on your stuff

Patterns foravailability

1. Static content

ImagesStylesheets Streaming content Assets Video Javascript

Templates ImagesStylesheets Streaming content Webpages Assets Blog posts Video Javascript PDFs

High Highredundancy availability Amazon S3 High durability

http://s3.amazonaws.com/bucketname/objectid http://bucketname.s3.amazonaws.com/objectid

https://s3.amazonaws.com/bucketname/objectidhttps://bucketname.s3.amazonaws.com/objectid

Perfect for asset hosting

Perfect for website hosting

Let’s see how...

aws.amazon.com/console

Make everything public

index.html Texthttp://mza.s3.amazon.com/site/index.html

https://mza.s3.amazon.com/site/index.html

Unfriendly, brittle URL:http://mza.s3.amazonaws.com/s3/index.html

S3 websites

Root objects

Error pages

Let’s see how...

https://my-website.s3-website-eu-west-1.amazon.com

Contentdistribution

Increased latency

CloudFrontPowerful content delivery network

Global edge caching + Friendly URLs

Let’s see how!

d19r58gd5nvk1.cloudfront.net

d19r58gd5nvk1.cloudfront.net/site/index.html

UpdateDNS CNAME

friendly-example.com/index.html

Set CloudFrontDefault Root Object

API or S3 client

CloudBerry Explorer API or S3 client Cyberduck

amazon_s3.html

friendly-example.com

friendly-example.com Global DNS CNAME Global Amazon CloudFront Regional Amazon S3 Redundant storage

2. Dynamic ormulti-tier content

Ruby on Rails PHP DjangoPerl Dynamic SpringDatabase Java Data store

BlogsE-commerce Gaming DynamicProductivity Apps Social networks

Elastic Multiplecapacity instance sizes Amazon EC2 On-demand

Mastering Multiple failure availability zones High availability Automation and monitoring

H I G H AVA I L A B I L I T Y W I T H E C 2Single server fail over

Elastic IPEC2 instance

Elastic IPEC2 instanceEBS storageEBS snapshot

Cheap, but not ideal

Requires monitoring and automation‘Hot swap’ possible

H I G H AVA I L A B I L I T Y W I T H E C 2 Horizontal redundancy

Applications with multiple tiers

Web serversApplication serversData store

Redundancy at each tier

Tolerant toinstance failure

Tolerant toAZ failure

eu-west-1 eu-west-2 Web servers Application servers Data store

Scale in and out (if you need to)

Load balance

Elastic Load BalancerWeb serversApplication serversData store

Let’s take a look!

Spin up your stack +Prepare for battle!

MySQL server with Amazon RDS

Endpoint

Conﬁgure app + cut an AMI

Create Image

Spin uphorizontal layer

http://ec2-46-137-20-114.eu-west-1.compute.amazonaws.com

Load balance

Elastic Load BalancerWeb serversAmazon RDS

Multiple AZdeployment

Elastic Load Balancereu-west-1a eu-west-1b Web servers Amazon RDS

eu-west-1b

eu-west-1a

eu-west-1b

Elastic Load Balancereu-west-1a eu-west-1b Web servers Amazon RDS

Recovery from failure

Autohealing & autoscaling

ELBCloudWatch Autoscaling

Elastic Load Balancer Autoscaling groupMetrics CloudWatch

Elastic Load Balancer Autoscaling groupMetrics CloudWatch Autoscaling service

as-create-launch-config PHPLaunchConfig --image-id ami-132216677 --instance-type m1.large --key amazon-web --group "Web and SSH"

as-create-auto-scaling-group PHPScalingGroup --launch-configuration PHPLaunchConfig --availability-zones eu-west-1a, eu-west-1b --min-size 10 --max-size 10 --load-balancers lamp-load-balancer

as-create-or-update-trigger CPUUtlization DiskReadBytes DiskReadOps DiskWriteBytes DiskWriteOps NetworkIn NetworkOut DatabaseConnections FreeStorageSpace ReadLatency ReadThroughput SwapUsage WriteLatency

Automation

Custom AMIs

CloudFormation

Bootstrap

Conﬁgurationmanagement

Elastic Load Balancereu-west-1a eu-west-1b Auto-scaling web servers Amazon RDS

Elastic Load Balancereu-west-1a eu-west-1b Auto-scaling web servers MySQL Amazon RDS

Extra I G H A V A I L A B I L I T Y W I T H E C 2 Hcredit! Performance

Horizontal layers are ﬂexible

Add caching

HTTP cacheWeb serversApplication serversData cacheData store

Varnish:HTTP reverse proxy

Memcached:key/value store

May requireapplication refactor

Custom metrics

AGENDA High Performance Websites1. Availability2. Static content3. Multi-tier applications4 . Per formance boost5. Summar y

Importance ofhigh availability

Hosting assets on Amazon S3

Content distribution with Amazon CloudFront

Hosting static web content on S3 and CloudFront

Web applications on Amazon EC2

Designing for availability

Multi-tier application hosting

Database management with Amazon RDS

Slides + videoavailable soon

Thank you!

Q U E S T I O N S + C O M M E N T Smatthew@amazon.com @mza O N T W I T T E R

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