Introduction to DevOps on AWS

Introduction to Amazon Web Services

Amazon Web Services(AWS) is a cloud service from Amazon, which provides services in the form of building blocks, these building blocks can be used to create and deploy any type of application in the cloud.

It is a comprehensive, easy to use computing platform. The platform is developed with a combination of infrastructure as a service (IaaS), platform as a service (PaaS) and packaged software as a service (SaaS) offerings.

Benefits Of AWS for DevOps

There are many benefits of using AWS for DevOps:

Get Started Fast: Each AWS service is ready to use if you have an AWS account. There is

no setup required or software to install.

Fully Managed Services: These services can help you take advantage of AWS resources

quicker. You can worry less about setting up, installing, and operating infrastructure on

your own. This lets you focus on your core product.

Built for Scalability: You can manage a single instance or scale to thousands using AWS

services. These services help you make the most of flexible compute resources by

simplifying provisioning, configuration, and scaling.

Programmable: You have the option to use each service via the AWS Command Line

Interface or through APIs and SDKs. You can also a model and provision AWS resources

and your entire AWS infrastructure using declarative AWS CloudFormation templates.

Automation: AWS helps you use automation so you can build faster and more efficiently.

Using AWS services, you can automate manual tasks or processes such as deployments,

development & test workflows, container management, and configuration management.

Secure: Use AWS Identity and Access Management (IAM) to set user permissions and

policies. This gives you granular control over who can access your resources and how they

access those resources.

Importance Of Buffer In Amazon Web Services

An Elastic Load Balancer ensures that the incoming traffic is distributed optimally across

various AWS instances.

A buffer will synchronize different components and makes the arrangement additional

elastic to a burst of load or traffic.

The components are prone to work in an unstable way of receiving and processing the

requests. The buffer creates the equilibrium linking various apparatus and crafts them effort at the identical rate to supply more rapid services.

Various Components Involved In Amazon Web Services

There are mainly 4 components in AWS:

Amazon S3: with this, one can retrieve the key information which are occupied in creating

cloud structural design and amount of produced information also can be stored in this

the component that is the consequence of the key specified.

Amazon EC2 instance: helpful to run a large distributed system on the Hadoop cluster.

Automatic parallelization and job scheduling can be achieved by this component.

Amazon SQS: this component acts as a mediator between different controllers. Also worn

for cushioning requirements those are obtained by the manager of Amazon.

Amazon SimpleDB: helps in storing the transitional position log and the errands executed

by the consumers.

How Spot instance different from an On-Demand instance or Reserved Instance

Spot Instance, On-Demand instance, and Reserved Instances are all models for pricing.

Moving along, spot instances provide the ability for customers to purchase compute

capacity with no upfront commitment, at hourly rates usually lower than the On-Demand

the rate in each region.

Spot instances are just like bidding, the bidding price is called Spot Price. The Spot Price

fluctuates based on supply and demand for instances, but customers will never pay more

then the maximum price they have specified.

If the Spot Price moves higher than a customer’s maximum price, the customer’s EC2

the instance will be shut down automatically.

But the reverse is not true if the Spot prices come down again, your EC2 instance will not

be launched automatically, one must do that manually.

In Spot and on-demand instance, there is no commitment for the duration from the user

side, however in reserved instances one must stick to the time period that he has chosen.

Amazon Elastic Container Service (ECS)

Amazon Elastic Container Service (ECS) is highly scalable, high-performance container

management service that supports Docker containers and allows us to easily run

applications on a managed cluster of Amazon EC2 instances.

AWS Lambda in AWS DevOps

AWS Lambda lets us run code without provisioning or managing servers. With Lambda,

we can run code for virtually any type of application or backend service, all with zero

administration.

Just upload your code and Lambda takes care of everything required to run and scale your

code with high availability.

Best practices for Security in Amazon EC2

There are several best practices to secure Amazon EC2. A few of them are given below:

Ø  Use AWS Identity and Access Management (IAM) to control access to your AWS         resources.

Ø  Restrict access by only allowing trusted hosts or networks to access ports on your

instance.

Ø  Review the rules in your security groups regularly, and ensure that you apply the

principle of least.

Ø  Privilege – only open up permissions that you require.

Ø  Disable password-based logins for instances launched from your AMI. Passwords

can be found or cracked and are a security risk.

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