What is AWS CloudWatch ?

Amazon CloudWatch is a monitoring service for AWS cloud resources and the applications you run on AWS. You can use Amazon CloudWatch to collect and track metrics, collect and monitor log files, set alarms, and automatically react to changes in your AWS resources. Amazon CloudWatch can monitor AWS resources such as Amazon EC2 instances, Amazon DynamoDB tables, and Amazon RDS DB instances, as well as custom metrics generated by your applications and services, and any log files your applications generate. You can use Amazon CloudWatch to gain system-wide visibility into resource utilization, application performance, and operational health. You can use these insights to react and keep your application running smoothly.

EC2 A Backbone of AWS.

Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides secure, resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers.

Amazon EC2’s simple web service interface allows you to obtain and configure capacity with minimal friction. It provides you with complete control of your computing resources and lets you run on Amazon’s proven computing environment. Amazon EC2 reduces the time required to obtain and boot new server instances to minutes, allowing you to quickly scale capacity, both up and down, as your computing requirements change. Amazon EC2 changes the economics of computing by allowing you to pay only for capacity that you actually use. Amazon EC2 provides developers the tools to build failure resilient applications and isolate them from common failure scenarios.

ELASTIC WEB-SCALE COMPUTING

Amazon EC2 enables you to increase or decrease capacity within minutes, not hours or days. You can commission one, hundreds, or even thousands of server instances simultaneously. You can also use Amazon EC2 Auto Scaling to maintain availability of your EC2 fleet and automatically scale your fleet up and down depending on its needs in order to maximize performance and minimize cost. To scale multiple services, you can use AWS Auto Scaling.

COMPLETELY CONTROLLED

You have complete control of your instances including root access and the ability to interact with them as you would any machine. You can stop any instance while retaining the data on the boot partition, and then subsequently restart the same instance using web service APIs. Instances can be rebooted remotely using web service APIs, and you also have access to their console output.

FLEXIBLE CLOUD HOSTING SERVICES

You have the choice of multiple instance types, operating systems, and software packages. Amazon EC2 allows you to select a configuration of memory, CPU, instance storage, and the boot partition size that is optimal for your choice of operating system and application. For example, choice of operating systems includes numerous Linux distributions and Microsoft Windows Server.

INTEGRATED

Amazon EC2 is integrated with most AWS services such as Amazon Simple Storage Service (Amazon S3), Amazon Relational Database Service (Amazon RDS), and Amazon Virtual Private Cloud (Amazon VPC) to provide a complete, secure solution for computing, query processing, and cloud storage across a wide range of applications.

RELIABLE

Amazon EC2 offers a highly reliable environment where replacement instances can be rapidly and predictably commissioned. The service runs within Amazon’s proven network infrastructure and data centers. The Amazon EC2 Service Level Agreement commitment is 99.99% availability for each Amazon EC2 Region.

SECURE

Cloud security at AWS is the highest priority. As an AWS customer, you will benefit from a data center and network architecture built to meet the requirements of the most security-sensitive organizations. Amazon EC2 works in conjunction with Amazon VPC to provide security and robust networking functionality for your compute resources.

 INEXPENSIVE

Amazon EC2 passes on to you the financial benefits of Amazon’s scale. You pay a very low rate for the compute capacity you actually consume. See Amazon EC2 Instance Purchasing Options for more details.

Content source:-https://aws.amazon.com/ec2

What is DynamoDB?

Amazon DynamoDB

Amazon DynamoDB is a fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale. It is a fully managed cloud database and supports both document and key-value store models. Its flexible data model, reliable performance, and automatic scaling of throughput capacity makes it a great fit for mobile, web, gaming, ad tech, IoT, and many other applications. 

Fast, Consistent Performance

DynamoDB is designed to deliver consistent, fast performance at any scale for all applications. Average service-side latencies are typically single-digit milliseconds. As your data volumes grow and application performance demands increase, DynamoDB uses automatic partitioning and SSD technologies to meet your throughput requirements and deliver low latencies at any scale.

Highly Scalable

DynamoDB automatically scales capacity up or down, as application request volumes increase or decrease. Auto-scaling is enabled by default, and you only need to specify the target utilization. Actual throughput consumption is continuously monitored in the background by CloudWatch alarms and provisioned throughput adjusted, whenever utilization deviates from target. If you need to scale your application to serve globally dispersed users, Global Tables enables you to automatically replicate your data across your choice of AWS regions.

Fully Managed

DynamoDB is a fully managed non-relational database service – you simply create a database table, set your target utilization for Auto Scaling, and let the service handle the rest. You no longer need to worry about database management tasks such as hardware or software provisioning, setup and configuration, software patching, operating a reliable, distributed database cluster, or partitioning data over multiple instances as you scale. DynamoDB also lets you backup and restore all your tables for data archival, helping you meet your corporate and governmental regulatory requirements.

Event Driven Programming

DynamoDB integrates with AWS Lambda to provide Triggers which enables you to architect applications that automatically react to data changes. 

Fine-grained Access Control

DynamoDB integrates with AWS Identity and Access Management (IAM) for fine-grained access control for users within your organization. You can assign unique security credentials to each user and control each user's access to services and resources. 

Flexible

DynamoDB supports both document and key-value data structures, giving you the flexibility to design the best architecture that is optimal for your application.

Content Source:-https://aws.amazon.com/dynamodb/

How to setup Wordpress on AWS EC2 Instance ?

Host your Wordpress website on Amazon Web Services using the AWS EC2 Free Tier Instance! Easily and quickly install your WordPress blog on Amazon's servers. Install Wordpress on AWS EC2 in 5 Minutes 1 HTTP,PHP,MYSQL Server Installation 2 Database Configuration 3 Download wordpress site 4 Configure the wordpress with database

Steps

#!/bin/bash yum update -y yum install httpd yum install php php-mysql -y yum install mysql-server -y service httpd start service mysqld start mysqladmin -uroot create mydb cd /var/www/html wget http://wordpress.org/latest.tar.gz tar -xzf latest.tar.gz mv wordpress/ testwordpress cd testwordpress mv wp-config-sample.php wp-config.php

What is Amazon EBS ?

Amazon Elastic Block Store (Amazon EBS) provides persistent block storage volumes for use with Amazon EC2 instances in the AWS Cloud. Each Amazon EBS volume is automatically replicated within its Availability Zone to protect you from component failure, offering high availability and durability. Amazon EBS volumes offer the consistent and low-latency performance needed to run your workloads. With Amazon EBS, you can scale your usage up or down within minutes – all while paying a low price for only what you provision.

Amazon EBS is designed for application workloads that benefit from fine tuning for performance, cost and capacity. Typical use cases include Big Data analytics engines (like the Hadoop/HDFS ecosystem and Amazon EMR clusters), relational and NoSQL databases (like Microsoft SQL Server and MySQL or Cassandra and MongoDB), stream and log processing applications (like Kafka and Splunk), and data warehousing applications (like Vertica and Teradata).

content source:-https://aws.amazon.com/ebs

What is CloudFront ?

Amazon CloudFront is a web service that speeds up distribution of your static and dynamic web content, for example, .html, .css, .php, image, and media files, to end users. CloudFront delivers your content through a worldwide network of edge locations. When an end user requests content that you're serving with CloudFront, the user is routed to the edge location that provides the lowest latency, so content is delivered with the best possible performance. If the content is already in that edge location, CloudFront delivers it immediately. If the content is not currently in that edge location, CloudFront retrieves it from an Amazon S3 bucket or an HTTP server (for example, a web server) that you have identified as the source for the definitive version of your content.

Content Source:- https://aws.amazon.com/documentation/cloudfront/

What Is the AWS Command Line Interface?

The AWS CLI is an open source tool built on top of the AWS SDK for Python (Boto) that provides commands for interacting with AWS services. With minimal configuration, you can start using all of the functionality provided by the AWS Management Console from your favorite terminal program.

• Linux shells – Use common shell programs such as Bash, Zsh, and tsch to run commands in Linux, macOS, or Unix.
• Windows command line – On Microsoft Windows, run commands in either PowerShell or the Windows Command Processor.
• Remotely – Run commands on Amazon EC2 instances through a remote terminal such as PuTTY or SSH, or with Amazon EC2 systems manager.

The AWS CLI provides direct access to AWS services' public APIs. Explore a service's capabilities with the AWS CLI, and develop shell scripts to manage your resources. Or take what you've learned to develop programs in other languages with the AWS SDK.

In addition to the low level, API equivalent commands, the AWS CLI also provides customizations for several services. Customizations are higher level commands that simplify using a service with a complex API. For example, the aws s3 set of commands provide a familiar syntax for managing files in Amazon S3

Example Upload a file to Amazon S3

aws s3 cp provides a shell-like copy command, and automatically performs a multipart upload to transfer large files quickly and resiliently.

~$ aws s3 cp myfile.mp4 s3://mybucket/