1. Designing
Fault
Tolerant
Applica3ons
on
AWS
Janakiram
MSV
Technology
Evangelist,
India
Amazon
Web
Services

2. Designing
Fault-­‐Tolerant
Applica3ons
on
AWS
Janakiram
MSV
Technology
Evangelist
Amazon
Web
Services
@janakiramm
jmsv@amazon.com

3. Based
on
the
white
paper
Building
Fault-­‐Tolerant
Applica4ons
on
AWS

4. Agenda
• AWS
Building
Blocks
• Amazon
EC2
Architecture
– AMI
– EIP
– EBS
– ELB
• HA
features
of
Amazon
RDS
– MulN-­‐AZ
• Summary

5. AWS
Building
Blocks
Tools
to
access
services
Cross
Service
features
Pla4orm
building
blocks
Infrastructure
building
blocks

6. Amazon
EC2
Flexible
Compute
Capacity
on
the
Cloud
• ElasNc
• Completely
Controlled
• Flexible
• Reliable
• Secure
• Inexpensive

7. Amazon
EC2
Architecture
Region
Ephemeral
Amazon
Storage
Machine
Availability
Zone
Image
Elas3c
EC2
Instance
Block
Storage
Amazon
Security
Groups
CloudWatch
Elas3c
IP
Auto
Scale
Elas3c
Load
Balancer
Amazon
S3
EBS
EBS
Snapshot
Snapshot

8. ElasNc
IP
• Public
StaNc
IP
Address
• Associated
with
an
AWS
account
• Dynamically
assign
to
a
running
instance
• Quickly
remap
EIP
to
any
instance

9. ElasNc
IP
ElasNc
IP
WWW
WWW
EC2
Instance
DB
DB

30. ElasNc
Block
Store
• Create
storage
volumes
from
1GB
to
1TB
• Can
be
formaVed
with
a
naNve
file
system
• Storage
volume
is
automaNcally
replicated
within
the
same
Availability
Zone
• Ability
to
create
point-­‐in-­‐Nme
snapshots
that
can
be
stored
on
S3
• IntegraNon
with
Amazon
CloudWatch
to
track
performance
metrics

31. EBS
ElasNc
IP
WWW
EC2
Instance
DB
EBS

32. EBS
ElasNc
IP
EC2
Instance
WWW
EBS
DB

123. Instance
Metadata
• Used
to
build
generic
AMIs
• Access
instance
specific
data
that
is
unique
• Access
user
supplied
data
• User
supplied
metadata
is
limited
to
16K
• Metadata
is
available
at
h9p://169.254.169.254/metadata

124. Making
the
AMI
Dynamic
169.254.169.254
Amazon
S3

125. Dynamic
Discovery
of
the
DB
Web
Server
1
Web
Server
2
Web
Server
3
DB1
DB2
DB3
Slave
Slave
Slave
DB
Master

139. ElasNc
Load
Balancer
• Distribute
incoming
traffic
across
instances
running
across
Availability
Zones
• Detect
the
health
of
instances
and
block
traffic
to
unhealthy
instances
• Supports
sNcky
sessions
• Supports
both
IPv4
and
IPv6
• Request
count
and
Request
latency
metrics
in
Amazon
CloudWatch

156. Amazon
RDS
• Amazon
RDS
is
a
web
service
to
setup,
operate
and
scale
a
database
on
Cloud
• Access
to
familiar
databases
like
MySQL
or
Oracle
• Manages
patching,
backup
and
recovery
• Supports
scale-­‐out
for
read-­‐heavy
database
workloads
on
MySQL
• No
upfront
investment;
pay-­‐as-­‐you-­‐go
pricing
model

157. MulN-­‐AZ
in
Amazon
RDS
Client
Applica3on
MySQL
MySQL
AutomaNc
Failover
RDS
RDS
Primary
Standby
Synchronous
ReplicaNon
Availability
Zone
Availability
Zone
1
2

165. Summary
• Start
with
EC2
• AVach
an
ElasNc
IP
• Create
and
aVach
EBS
• Bundle
generic
AMIs
• Associate
EC2
instances
with
the
ELB
• Launch
RDS
DB
Instances
in
MulN-­‐AZ

166. Resources
• hVp://aws.amazon.com
• hVp://aws.amazon.com/ec2
• hVp://aws.amazon.com/ebs
• hVp://aws.amazon.com/rds