As the name suggests, auto scaling allows you to scale your Amazon EC2 instances up or down automatically as per the instructions set by the user. Parameters like minimum and maximum number of instances are set by the user. Using this, the number of Amazon EC2 instances you’re using increases automatically as the demand rises to maintain the performance, and decreases automatically as the demand decreases to minimize the cost.

Auto Scaling is particularly effective for those applications that fluctuate on hourly, daily, or weekly usage. Auto Scaling is enabled by Amazon CloudWatch and is available at no extra cost. AWS CloudWatch can be used to measure CPU utilization, network traffic, etc.

Elastic Load Balancing

Elastic Load Balancing (ELB) automatically distributes incoming request traffic across multiple Amazon EC2 instances and results in achieving higher fault tolerance. It detects unfit instances and automatically reroutes traffic to fit instances until the unfit instances have been restored in a round-robin manner. However, if we need more complex routing algorithms, then choose other services like Amazon Route53.

ELB consists of the following three components.

Load Balancer

This includes monitoring and handling the requests incoming through the Internet/intranet and distributes them to EC2 instances registered with it.

Control Service

This includes automatically scaling of handling capacity in response to incoming traffic by adding and removing load balancers as required. It also performs fitness check of instances.

SSL Termination

ELB provides SSL termination that saves precious CPU cycles, encoding and decoding SSL within your EC2 instances attached to the ELB. An X.509 certificate is required to be configured within the ELB. This SSL connection in the EC2 instance is optional, we can also terminate it.

Features of ELB

Following are the most prominent features of ELB −

ELS is designed to handle unlimited requests per second with gradually increasing load pattern.
We can configure EC2 instances and load balancers to accept traffic.
We can add/remove load balancers as per requirement without affecting the overall flow of information.
It is not designed to handle sudden increase in requests like online exams, online trading, etc.
Customers can enable Elastic Load Balancing within a single Availability Zone or across multiple zones for even more consistent application performance.

How to Create Load Balancers?

Step 1 − Go to Amazon EC2 console using this link − https://console.aws.amazon.com/ec2/.

Step 2 − Select your load balancer region from the region menu on the right side.

Step 3 − Select Load Balancers from the navigation pane and choose Create Load Balancer option. A pop-up window will open and we need to provide the required details.

Step 4 − In load Balancer name box: Enter name of your load balancer.

Step 5 − In create LB inside box: Select the same network which you have selected for instances.

Step 6 − Select Enable advanced VPC configuration, if selected default VPC.

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Step 7 − Click the Add button and a new pop-up will appear to select subnets from the list of available subnets as shown in the following screenshot. Select only one subnet per availability zone. This window will not appear if we do not select Enable advanced VPC configuration.

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Step 8 − Choose Next; a pop-up window will open. After selecting a VPC as your network, assign security groups to Load Balancers.

Step 9 − Follow the instructions to assign security groups to load balancers and click Next.

Step 10 − A new pop-up will open having health checkup configuration details with default values. Values can be set on our own, however these are optional. Click on Next: Add EC2 Instances.

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Step 11 − A pop-up window will open having information about instances like registered instances, add instances to load balancers by selecting ADD EC2 Instance option and fill the information required. Click Add Tags.

Step 12 − Adding tags to your load balancer is optional. To add tags click the Add Tags Page and fill the details such as key, value to the tag. Then choose Create Tag option. Click Review and Create button.

A review page opens on which we can verify the setting. We can even change the settings by choosing the edit link.

Step 13 − Click Create to create your load balancer and then click the Close button.

How to Delete a Load Balancer?

Step 1 − Go to Amazon EC2 console using this link − https://console.aws.amazon.com/ec2/.

Step 2 − Choose Load Balancers option from the navigation pane.

Step 3 − Select Load balancer and click the Action button.

Step 4 − Click the Delete button. An alert window will appear, click the Yes, Delete button.

So, this brings us to the end of blog.This Tecklearn ‘Amazon Auto Scaling’ helps you with commonly asked questions if you are looking out for a job in AWS and Cloud Computing.
If you wish to learn AWS and build a career in Cloud Computing domain, then check out our interactive, AWS Solutions Architect Training, that comes with 24*7 support to guide you throughout your learning period. Please find the link for course details:

https://www.tecklearn.com/course/aws-solutions-architect-certification-training/

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About the Course

Tecklearn’s AWS Architect Certification Training is curated by industry professionals as per the industry requirements and demands. The entire AWS training course is in line with the AWS Certified Solutions Architect exam. You will learn various aspects of AWS like Elastic Cloud Compute, Simple Storage Service, Virtual Private Cloud, Aurora database service, Load Balancing, Auto Scaling and more by working on hands-on projects and case studies. You will master AWS architectural principles and services such as IAM, VPC, EC2, EBS and elevate your career to the cloud, and beyond with this AWS solutions architect course.

Why Should you take AWS Architect Certification Training?

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AWS market is expected to reach $236 Billion by 2020 at a CAGR of 22% – Forrester
Netflix, Twitter, LinkedIn, Facebook, BBC, Baidu, ESPN & other MNCs worldwide use Amazon AWS Cloud

What you will Learn in this Course?

Overview of Cloud Computing and AWS

What is Cloud Computing
Definition of Cloud Computing
On Premises Vs Service Models
Advantages and Disadvantages of Cloud Computing
Cloud Computing Providers
Why AWS
What is AWS
AWS Benefits
AWS Services
Traditional Vs AWS Components
AWS Global Infrastructure
AWS Availability Zone
AWS Edge Locations
How to Access the AWS Services
AWS architecture
AWS Management Console
AWS offerings Listing (EC2, VPC, AMI, EBS, ELB, Backup)

Amazon Elastic Compute Cloud (EC2)

Overview of EC2
Elastic IP Vs Public IP
Launching of AWS EC2 instance demo
How to access EC2
EC2 Purchasing Options
Amazon Machine Images (AMI)
EC2 Storage for the Root Device
EC2 Creating AMI
EC2 Instance Types
Auto Scaling
Cost of EC2
Best Practices of EC2
EC2 Resizing
Placement Groups
Amazon Backup and various Concepts
EC2 Demo
Hands On

Networking and Monitoring Services: Amazon Virtual Public Cloud

Virtual Private Cloud (VPC) and its benefits
Default and Non-Default VPC
IP Address
CIDR – Classless Inter-domain Routing
Subnet: Subnet Mask and Subnet Mask Classes
Private and Public Subnet
IPv4 v/s IPv6 – As in AWS Infrastructure
Internet Gateway and Route Tables
Security Group with VPC
Access Control List, NACL and Security Group
NAT Devices: NAT Gateway and NAT Instance
Flow Logs
VPC Peering and its working
VPN and Direct Connect
VPC Limitations
Need for Monitoring Services
AWS CloudWatch and it’s working
AWS Command Line Interface
Use Cases
Hands On

Amazon Storage Services: Elastic Block Storage

What is Storage Services
What is Elastic Block Storage (EBS)
Persistent Storage
EBC Features
EBS Benefits
EBS Types
EBS Pricing
EBS Life Cycle
EBS Snapshot
EBS General Purposed SSD
EBS Provisioned IOPS SSD
EBS Throughput Optimized HDD
EBS Cold HDD
EBS Comparison
EBS Previous Generation Volumes
EBS How Incremental Snapshots Work
EBS Deleting an Amazon EBS Snapshot
EBS Summary
Hands On

Amazon Storage Services: Simple Storage Services (S3)

What is Amazon AWS S3
Simple Storage Services (S3) Advantages
S3 Buckets, Objects, Keys and Endpoints
S3 Data Consistency Model
S3 Transfer Acceleration
S3 Storage Types
S3 Versioning
S3 Life Cycle Management
S3 Data Protection
S3 Cross-Region Replication
S3 Hosting a Static Website
Hands On

Amazon Storage Services

Amazon Glacier Storage
Amazon Storage Gateway
Amazon Snowball (Data Import /Export)
Billing with Amazon CloudWatch
Hands On

AWS Database Services: Relational Database Service (RDS)

Overview of Databases and Relational Database Service (RDS)
What is Amazon RDS
AWS RDS Components
AWS RDS: Interface
AWS RDS: Charges
AWS RDS Multi-AZ: Benefits
AWS RDS Multi-AZ: Failover Process
NoSQL Database: Amazon DynamoDB
Overview of DynamoDB
DynamoDB Benefits
Hands On

AWS Database Services Continued

Data Warehouse: Amazon Redshift
Overview of Amazon Redshift
Redshift Architecture
Amazon Redshift features
In Memory Cache: Amazon ElasticCache
Redis Vs MemCache
Amazon ElasticCache Cluster
Database Migration: AWS Database Migration Service

Load Balancing in AWS

What is Fault Tolerant System
Features of Elastic Load Balancing
What is AWS ELB (Elastic Load Balancer)
Types of Load Balancer: Classic, Application and Network
Classic Load Balancer: Features, Health Check Configuration, Cross-Zone, Connection Draining, Sticky Sessions, Access Logs, Limitation
Application Load Balancer: Features, Application Flow, Limitation
Network Load Balancer
Access Elastic Load Balancing: AWS Management Console, AWS CLI, AWS SDKs, HTTPS Query API

Amazon Route 53

What is Amazon Route 53
Domain Name Registration
Routing Internet Traffic to Resources
Automated check of the health of Resources + Data Pipeline

AWS Identity and Access Management (IAM) – Control user access

Authentication (Who can use) and Authorization (Level of Access)
IAM Policies – JSON Structure
Users, Groups and their Roles
AWS IAM Features
User Sign-in to Account
Switch Role
Role to EC2 Instance
Password Policy
How to Access AWS
Multi-Factor Authentication (MFA)
Permissions and Permission Types
Policies Structure
User Based Policies
Resource Based Policies
Resource Based Permission
Policies Types
Request Flow
Limitations
IAM HTTPS API
Logging IAM Events with AWS CloudTail
Hands On

Amazon CloudWatch

What is Amazon CloudWatch
Features and Benefits
CloudWatch Architecture
Hands On

AWS Auto Scaling

What is AWS Auto Scaling
Auto Scaling Components
Auto Scaling Group
Auto Scaling Launch Configuration
Auto Scaling Benefits
Auto Scaling Lifecycle
Auto Scaling Plans
Manual Scaling
Schedule Scaling
Dynamic Scaling
Auto Scaling Step Adjustment
Auto Scaling Termination Policy
Default Termination Policy
Health Check
Hands On

Amazon Application Services

Elastic BeanStalk
Simple Email Services (SES)
Simple Queue Service (SQS)
Simple Notification Services (SNS)
AWS Lambda
Introduction to Elastic OpWorks
Hands On

About AWS Solution Architect Associate Exam

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