Scalr Demo

Scalr Demo…..or how to scale Wordpress on AWS in 20 minutes 24 May 2012 Andreas Chatzakis Teo Kotsilinis AWS Usergroup Greece

Here is the plan We will set up a scalable web infra in minutes andinstall wordpress to prove it works!– ELB as load balancer– Multiple autoscaling EC2 Apache servers– EC2 memcache– EC2 MySQL master-slave setup– S3/cloudfront for static storageWe will show Scalr features like Deployments Server Snapshots Farms setup and config Failover, Autoscaling Scripting engine DNS, Vhosts DB management Services configuration 2

Architecture 3

Prep done in advanceRegistered for an AWS accountRegistered for a trial www.scalr.net accountAdded my AWS keys on ScalrCreated S3 bucket and setup permissions 4

Create a new farm 5

Config DB role 6

Config memcache role 7

Config App role 8

Launch farm 9

DNS Management 10

Vhost 11

And I can change mysql config via GUI 12

Bootstrap application role 13

Bye bye Cron! 14

Create DB user 15

Deploy app 16

Configure wordpress 17

DiscoveryI can use DNS, API or command line to get a view of my surounding environment,automating config changes: int.master.mysql.farm-hash.scalr-dns.net int.slave.redis.farm-hash.scalr-dns.net ext.master.postgresql.farm-hash.scalr-dns.net ext.server-index.farm-role-id.farm-hash.scalr-dns.net #ls /etc/scalr/private.d/hosts app memcache mysql-slave mysql-master #ls /etc/scalr/private.d/hosts/mysql-master 10.241.6.71 18

Edit php.ini via the browser session.save_handler = memcache . session.save_path="tcp://memcachserver:port ” 19

SnapshotNow that we have prepared our app server, lets “save” it in a server snapshot: Easy rollback: 20

Lets autoscale!ab -n 1000 -c 100 http://my-awsuggr-elb.us-east-1.elb.amazonaws.com 21

The chaos monkey Kill mysql instance #1 (the master) Scalr triggers failover Slave server promoted to master Other slaves reconfigured to replicate from new master Extra slave initialized if minimum servers dictates so Scalr always initializes slaves from latest snapshot Slave in same AZ? Scalr re-uses EBS volume Slave in other AZ? Scalr creates snapshot of the dead-master EBS volume, creates new EBS volume from it 22

PHPMyAdmin, DNS endpoints, Replication/Backup Status 23

Utilization metrics 24

Add Caching & S3 plugin 25

Taking advantage of Master-Slave DB 26

What we did not showMulti cloud deployments: 27

Pricing 28

Questions? 29

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Scalr Demo

by Andreas Chatzakis on May 25, 2012

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