webapp on aws

AMAZON WEB SERVICESSHIJIE ZHANG

OUTLINE

▸ Background

▸ Cloud

▸ AWS

▸ A Detailed Example

▸ Background

▸ Compute (EC2, Auto Scaling, Lambda)

▸ Storage and Content Delivery (EBS, S3, CloudFront)

▸ Database (RDS, Dynamo, ElastiCache)

▸ Networking (ELB, Route 53, Virtual Private Cloud)

▸ Messaging (SQS, SNS)

▸ Security (IAM)

▸ Monitoring (CloudWatch, CloudTrail)

▸ Deploying (Beanstalk, CloudFormation)

▸ Summary

BACKGROUND-CLOUD

WHY PUBLIC CLOUD?

Cost savings Scalabilty Flexibility Training

Pay only for operational costs vs ownership

costs

Rapid expansion local & global

Change hardware configurations Set up lab instantly

Pay only for usage vs over provisioning Disaster recovery Adapt hardware to

baseline dynamically Try new features

BACKGROUND-CLOUD

CLOUD USAGE MODEL - HYBRID CLOUDS

AWS

Google

Azure

IBMVMware

FujitsuSunGard

Rackspace

ATT VerizonQuest

Unisys

your own servers

CSC

Hyperscale Cloud ProvidersNormal Cloud Providers

Public Cloud

Private Cloud

BACKGROUND-CLOUD


AWS

Google

Azure

IBMVMware

FujitsuSunGard

Rackspace

ATT VerizonQuest

Unisys

your own servers

CSC


Public Cloud

Private Cloud

2009

2%

98%

BACKGROUND-CLOUD


AWS

Google

Azure

IBMVMware

FujitsuSunGard

Rackspace

ATT VerizonQuest

Unisys

your own servers

CSC


Public Cloud

Private Cloud

2014

6%

94%

BACKGROUND-CLOUD


AWS

Google

Azure

IBMVMware

FujitsuSunGard

Rackspace

ATT VerizonQuest

Unisys

your own servers

CSC


Public Cloud

Private Cloud

2099?

~90%

~10%

BACKGROUND-CLOUD

DEVELOPER’S ROLE IN CLOUD

▸ Sounds like IT Pros’ problems rather than developers’? No

▸ Costs / Security / Integration / …

▸ Developer one of main target users

▸ Code applications aware of infrastructure (Assume infrastructure can fail e.g. Netflix)

▸ Host dev env / Deploy web app / Leverage cloud database…

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Background






▸ Security (IAM)



▸ Summary

BACKGROUND-AWS

BACKGROUND-AWS

AWS FREE TIER

▸ Great for getting a feeling

▸ Free for the first 12 months

BACKGROUND-AWS

AWS SUPPORT▸ Comprehensive documentation (Console / Native API / SDK)

▸ Tiers of support (developer / business / enterprise )

MAJOR USE CASES

BROAD AND DEEP INFRASTRUCTURE AS A SERVICE

▸ Give a detailed example later

MAJOR USE CASES

RICH PLATFORM SERVICES

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Backgrounds






▸ Security (IAM)



▸ Summary

SAMPLE APPLICATION

OVERALL ARCHITECTURE

AWS GLOBAL INFRASTRUCTURE

11 Regions & 30 Availability Zones - December 2015

5 More Regions & 10 More Availability Zones

A DETAILED EXAMPLE

REGIONS AND ZONES

▸ Region: a geographical area

▸ Availability Zone: a data center

▸ Different regions may have different services/prices

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Background






▸ Security (IAM)



▸ Summary

A DETAILED EXAMPLE

AWS COMPUTE SERVICES

▸ EC2

▸ Auto Scaling

▸ Lambda

▸ EC2 Container Service (for integration with docker)

▸ EMR (Amazon’s Hadoop implementation)

A DETAILED EXAMPLE

ELASTIC COMPUTER CLOUD ( EC2 )

▸ Def: Instance provisioning and shutting down service

▸ AMI def: Amazon Machine Image, virtual disk template (OVA, OVF)

▸ AMI instance types: (Support Windows / Linux)

▸ AMI pricing types:

Micro instances

General purpose

Compute optimized

GPU instances

Memory optimized

Storage optimized

On-demand Instances Reserved Instances Spot Instances

A DETAILED EXAMPLE

AUTO SCALING

▸ Def: expand or shrink EC2 instances on demand

▸ Triggers: Manual schedule or integrated with monitoring

load balancer

dns

A DETAILED EXAMPLE

AUTO SCALING

▸ Def: expand or shrink EC2 instances on demand

▸ Triggers: Manual schedule or integrated with monitoring (CloudWatch)

load balancer

dns

A DETAILED EXAMPLE

LAMBDA

▸ Def: Event-Driven compute service

▸ Does not require an instance, simplifying response to events

▸ Type of events: (Any API call or resource transition)

▸ Put objects in S3

▸ Transition in an EC2 instance

▸ Write to a database table

▸ Use cases:

▸ Generate thumbnail images as arriving in S3

▸ …

COMPUTE WITHIN ARCHITECTURE

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Background


▸ Storage and Content Delivery (EBS, S3, CloudFront, Glacier)




▸ Security (IAM)



▸ Summary

A DETAILED EXAMPLE

STORAGE SERVICES

▸ Ephemeral storage

▸ EBS

▸ S3 ( simple storage service)

▸ Glacier

▸ CloudFront

} Block Storage

Access through OS at device level

} Object Storage

Access through HTTP at user level

} Specialized purpose storage

A DETAILED EXAMPLE

Definition Durability Accessibility IOPS Snapshot

Storage coming with EC2 instance

Just C drive coming with PC

lost once instance terminated (not reboot)

Locked to one instance

No performance guarantee

Support with instance

Elastic block storage

Just like external disk for PC

persist until deleted

independently

Can attached to multiple instances

one at a timeSLA Support

independently

BLOCK STORAGE

A DETAILED EXAMPLE

SIMPLE STORAGE SERVICE (S3)

▸ History: First service by AWS

▸ Def: An storage bucket for objects

▸ Size: Unlimited bucket size, Up to 5TB object size

▸ Accessibility: HTTP/HTTPS

▸ Not: a file system (vs Dropbox)

A DETAILED EXAMPLE

SIMPLE STORAGE SERVICE (S3)

▸ Types:

▸ Standard storage:

▸ 99.999,999,999% durability

▸ $0.03 per GB / month

▸ Use cases: Master storage

▸ Reduced redundancy storage:

▸ 99.99% durability

▸ $0.024 per GB / month

▸ Use cases: Slave storage

A DETAILED EXAMPLE

GLACIER

▸ Price: Very cheap, $0.007 per GB / month (Region: Virginia)

▸ Usage: Ideal for backup

▸ Retrieval time: Very, very slow (4-6 hours)

A DETAILED EXAMPLE

CLOUDFRONT

▸ Definition: Global content delivery network service

▸ Infrastructure behind: Edge locations (CDN endpoints for CloudFront)

▸ Number: Over 50 Edge Locations, many more than regions

Blue: edge locations

Yellow: regions

STORAGE WITHIN ARCHITECTURE

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Background






▸ Security (IAM)



▸ Summary

A DETAILED EXAMPLE

DATABASE SERVICES

▸ RDS

▸ DynamoDB

▸ ElastiCache

▸ Redshift

A DETAILED EXAMPLE

RDS

▸ Def: Provision database instances

▸ Engines:

▸ Storage options:

MySQL PostgreSQL Oracle Microsoft SQL Server

Amazon Aurora

Storage Size IOPS Price

General purpose SSD 5GB — 3TB 3 IOPS per GB storage only

Elastic block storage 100GB — 3TB 1,000 ~ 30,000 IOPS per GB storage + IOPS

Magnetic storage 5GB — 3TB ~100 IOPS per GB Storage + I/O rate

A DETAILED EXAMPLE

RDS

▸ Hardware acquisition and upkeep (spacing, cooling)

▸ OS configuration and maintenance

▸ Database installation

▸ Database configuration

▸ Database patch

▸ Database backup

▸ Database scaling (give you powerful tools)

What aspects are managed?

What are left over?▸ Design schema

▸ Optimizing

▸ Scaling (with baked-in powerful tools)

A DETAILED EXAMPLE

RDS — SCALE UP▸ Increase storage amount

▸ Increase storage type (SSD, Magnetic, ..)

▸ Change instance class (CPU, RAM)

A DETAILED EXAMPLE

RDS — SCALE OUT▸ Read replica: DB replica for read access

▸ Use case: read-intensive applications / source for reports or analytics

▸ Can add additional indexes

▸ At least be same size as source DB instance

▸ Multi-AZ deployment: Synchronous standby (not eventually) in different AZ

▸ Use cases: Reduce latency during maintenance, automatic failover

A DETAILED EXAMPLE

DYNAMODB▸ Key-based noSQL DB

▸ When creating table, just need define primary keys, not schema

▸ Additional replica (happens behind scenes)

▸ Scaling up / out (happens behind scenes)

A DETAILED EXAMPLE

ELASTICACHE▸ Def: Cluster tied to single AZ，Distributed in-memory cache service

▸ Implemented based on Memcached

▸ Managed (Automatically fix failure nodes)

▸ Scale out (Add/Remove nodes)

A DETAILED EXAMPLE

ELASTICACHE

DATABASE WITHIN ARCHITECTURE

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Background






▸ Security (IAM)



▸ Summary

A DETAILED EXAMPLE

NETWORKING

▸ Virtual Private Cloud

▸ Elastic Load Balance

▸ Route53

A DETAILED EXAMPLE

VIRTUAL PRIVATE CLOUD▸ Usage: for building data center in AWS cloud

A DETAILED EXAMPLE

VIRTUAL PRIVATE CLOUD▸ VPC Peering

A DETAILED EXAMPLE

VIRTUAL PRIVATE CLOUD▸ AWS VPN

A DETAILED EXAMPLE

ELASTIC LOAD BALANCE▸ Usage: Distribute traffic across EC2 instances in one AZ, or multiple

▸ Distributed and fault tolerant built in

A DETAILED EXAMPLE

ROUTE 53▸ Def: DNS web service from AWS

▸ Usage: Map names to IP addresses / Load balancing between regions

▸ Not a domain registrar

▸ Routing targets: Route to CloudFront / ELB / websites running in S3

NETWORKING WITHIN ARCHITECTURE

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Background






▸ Security (IAM)



▸ Summary

A DETAILED EXAMPLE

MESSAGING

▸ SNS ( Simple Notification Service )

▸ SQS ( Simple Queue Service)

A DETAILED EXAMPLE

SIMPLE QUEUE SERVICE (SQS)

▸ Def: Highly available, scalable queue storage

▸ Usage：flow control / buffer / decoupling apps

▸ Size: Queue unlimited in queue size, single message up to 256 kb in size

▸ Costs: $0.50 / million SQS requests

A DETAILED EXAMPLE

SIMPLE NOTIFICATION SERVICE (SNS)

▸ Def: High available, scalable message broadcasting service

▸ Subscript to a topic, subscribers notified by HTTP/HTTPS/SMTP/SMS/SQS when new messages are available

▸ Usage: time-sensitive info updates, mobile app updates

MESSAGING WITHIN ARCHITECTURE

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Background






▸ Security (IAM)



▸ Summary

A DETAILED EXAMPLE

SECURITY

▸ IAM (Identity Access and Management)

▸ Instance security

A DETAILED EXAMPLE

IAM

▸ Def: Hub for control AWS permissions

▸ Role / Group / User — Policy

A DETAILED EXAMPLE

INSTANCE SECURITY

▸ Subnet layer - NACL (like firewalls for subnets)

▸ Instance layer - Security group (like firewall for instances)

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Background






▸ Security (IAM)



▸ Summary

A DETAILED EXAMPLE

MONITORING

▸ CloudWatch - AWS service metrics

▸ CloudTrail - all AWS API call logs

A DETAILED EXAMPLE

CLOUDWATCH

▸ Usage:

▸ Provides metrics,

▸ Raise alarm (send notification, stop servers, lambda)

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Background






▸ Security (IAM)



▸ Summary

A DETAILED EXAMPLE

DEPLOYING

▸ CloudFormation

▸ Elastic Beanstalk

A DETAILED EXAMPLE

CLOUDFORMATION / BEANSTALK

▸ Def: Automate stack of AWS resource provisioning / deleting

▸ Comparison: Similar purpose. Later one more for developers (Infrastructure as code in different sdks)

OUTLINE

▸ Background

▸ Cloud

▸ AWS


▸ Background






▸ Security (IAM)



▸ Summary

OVERALL ARCHITECTURE

SUMMARY

▸ Many cloud services are high scalable by default (S3, ELB, SQS, …). Some is ready for high scalability, but needs a little more work (RDS, EC2)

▸ AWS supports accessing service via GUI, SDK, Native APIs

▸ Utilizing AWS cloud in developing

REFERENCES

▸ https://app.pluralsight.com/library/courses/deploying-highly-available-distributed-systems-aws-part1/table-of-contents

▸ https://app.pluralsight.com/library/courses/deploying-highly-available-distributed-systems-aws-part2/table-of-contents

▸ https://app.pluralsight.com/library/courses/amazon-web-services-databases-in-depth/table-of-contents

▸ https://app.pluralsight.com/library/courses/aws-vpc-operations/table-of-contents

▸ https://app.pluralsight.com/library/courses/aws-course/table-of-contents

▸ https://app.pluralsight.com/library/courses/aws-system-admin-fundamentals/table-of-contents

▸ https://acloud.guru/courses

https://app.pluralsight.com/library/courses/deploying-highly-available-distributed-systems-aws-part1/table-of-contents

https://app.pluralsight.com/library/courses/deploying-highly-available-distributed-systems-aws-part2/table-of-contents

https://app.pluralsight.com/library/courses/amazon-web-services-databases-in-depth/table-of-contents

https://app.pluralsight.com/library/courses/aws-vpc-operations/table-of-contents

https://app.pluralsight.com/library/courses/aws-course/table-of-contents

https://app.pluralsight.com/library/courses/aws-system-admin-fundamentals/table-of-contents

https://acloud.guru/courses

THANKS

webapp on aws

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