Services Offered

Amazon S3

An object storage that can store and retrieve data from anywhere.

great tool for Internet backup option
cheapest option for object storage category
data is retrievable from the Internet

AWS Data Transfer

not only helps in collecting data, but monitoring and analyzing it in real time.
number of data transfer services are available eg. Kinesis, import/export Snowball, and Direct Connect

Amazon EC2 (Elastic Compute Cloud)

Provides secure and resizable compute capacity, designed to make web-scale cloud computing easier.

is a resizable computer.
can be resized anytime as per the requirement.

Amazon SNS (Simple Notification Service)

Enables messages to be delivered across a large number of subscribers, systems and services and mobile devices.

update user with notification through email or sms
can send anything

Amazon KMS (Key Management System)

A service integrated into most other AWS services, it helps create and control the encryption keys used to encrypt the user's data.

to encrypt the data

Amazon Lambda

A compute service that executes the code only when needed and scales automatically.

service for wnich we pay only for the seconds it uses to execute.
no need to pay for the infrastructure.

Route 53

The DNS web service is designed to give developers and businesses a reliable and cost effective method to route users to internet applications.

DNS service in the cloud

EC2

EC2 is a web-service which aims to make life easier for developers by providing secure and resizable compute capacity in the cloud.

ease in scaling up/down
can be integrated into several other services.
pay only for what you use.

Case study: Newsletter

Requirement

AWS account
EC2 instance for compute capacity
- choose an AMI (Amazon Machine Image) - is the software and application packages that we would need to run the application
  - it is a template that is used to create an instance/machine based on user requirement.
  - it contains: Software information, OS information, Volume information, Access permissions, etc
  - 2 types: Predefined (Amazon provided from AMI Marketplace) or Custom
- choose an instance type - choose h/w depending on the workload, and choose size of the h/w depending on the intensity of the workload.
  - specifies hardware specifications that are required in the machine form the previous step.
  - categorized into 5 main families: Compute optimized (for high processing power), Memory optimized (for in-memory caching), GPU optimized (large graphical requirement), Storage optimized (storage servers), General purpose
  - instance types are fixed and can not be altered.
- configure instance - eg. no of instances, which subnet do we want them in, what's going to be the terminate behaviour of the instances, do we need to update any package when instance starts running, etc
  - specify the number of instances, purchasing options, kind of network, subnet, when to assign public IP, IAM role, shutdown behaviour, add bootstrap scripts when VM starts, etc
  - multiple payment options are available: on-demand instance, reserved instance, spot instance
- adding additional storage - to EC2 instance
  - deciding type of storage: Ephemeral (temporary and free), Amazon Elastic Block Store (permanent and paid), Amazon S3
- add tags - to easily identify the EC2 instance at a later point.
- configure security group (aka firewall) - to allow/deny connection to/from the outside world.
- review and launch
  - Before launching, Amazon gives us option to create a key pair (public and private). Private key (.pem file) is downloaded by the user, and kept secret. The public key is kept by Amazon to identify the user.
Create a topic in SNS
- Simple Notification Service is a service in Amazon that helps us notify the customer through email.
- Create a topic and make it public.
- Add subscribers to the topic.
Create a bucket in S3
- store the content in this bucket.
- Create an event in the bucket relating it with SNS.
Sync the S3 bucket and AWS instance.