Ec2 part2

Ec2 part2

Class 46th AWS EC2 June 16th

Load Balancer

Types of elastic load balancer

Target groups

Practical

Launch templates 

Auto scaling 7 types of scaling

Auto scaling groups

Automatic scaling policies

Practical

What is the ELB?

• Elastic load balancing automatically distributes incoming application traffic across multiple targets, such as amazon Ec2 instances, containers, IP addresses , lambda functions, and virtual appliances 
• It can handle the varying load of your application traffic in a single availability zone or across multiple

Users -->LoadBalancer-->Targetgroups-(round robin)-> Multiple Webappl Instances -->database

We have configured mapped domain to loadbalancer endpoint

Elastic Load balancing types:
Application load balancer :
Best for:websites,web apps, and APIs(Http/Https)
Understands URL paths and headers -can route based on /login, /image ,etc

Smart choice for modern web apps or micro service

Network load balancer 
Best for: High-spees and real-time apps(TCP,UDP)
Very fast handles millions for request per second 
Use when speed and high performance are critical,like game servers or financial apps
Gateway load balancer:
Best for :sending traffic to security appliances like firewalls,intrusion detection system(IDS), and traffic inspection tools.
Forwards traffic without modifying it,so security tools can inspect the full,original packets.
Use when you need to inspect or filter traffic before it reaches you applications like in secure VPC architectures or centralized firewall setups .

Classic load balancer: not used

Practical:

All our instances private subnet ,our load balance is public subnet 

Step1: Create three instance using Public subnet ,while creating instance add below code  Advance details User data

#!/bin/bash

# STEP1  -updates 

sudo yum update -y

# STEP2 -Begin Configuration 

sudo yum install -y httpd 

sudo systemctl start httpd

sudo systemctl enable httpd

# STEP3 Custom web page 

echo "<h1>Welcome to CCIT Server 1 </h1>" >>/var/www/html/index.html 

change last line  remaining two servers For Server2 Second instance and Server3 for third instance

echo "<h1>Welcome to CCIT Server 2 </h1>" >>/var/www/html/index.html 

echo "<h1>Welcome to CCIT Server 3 </h1>" >>/var/www/html/index.html 

Step2:Three instances created ,Ec2-Instance1,Ec2-Instance2,Ec2-Instance3

Step3:Instance public ip able to access webpage server1,server2,server3 three tabs 

Step4:Need to create target group attach the instances to target group

Ec2>Target groups >create target groups ,Select first option instance given name target group

Target group name: CCIT-TG

Health checks :Here below User access the webpage, it will hit the load balancer distributed the traffice equally all webservers.

Advanced health check settings: default setup load balancer the webserver http port 80, every 5 seconds

and it will check 2 time, every 5 seconds interval consequently check server health check ,Success code is 200,Click Next

                                                            

Click Including as pending below and then Click create target group

It is take some time come health status unused to used in target group , it was dependency with load balancer, so need create load balancer

Step5: Creating load balancer 

Ec2>Load balancer >Choose Load balancer types  >Application Load Balancer

Given any name ccit-loadbalance, All your instance should be in public choose your subnet public

Choose select target group: here http request 80 will go target group, target group based on health check it will go the request. then click Create load balancer, it will take some time to active

Load balancer is now active 

And target groups are now healthy, if any unhealthy instance we can create auto scale, it will create automatically when one instance has issues.

Step6: take the dns name from  the load balancer end point http://ccit-loadbalance-1595733045.eu-west-2.elb.amazonaws.com/

After refresh multiple time same dns name ,the load is divided equally three server automatically

Step7:If you want, you can set these into route 53, How to buy the domain go daddy.. plat form and register the domain, for you domain add the record endpoint loadbalancer,it will give unique http: name.If you want https:// we have once concept ASM certificate in aws  it will cover there.

Buying Domain in Go daddy

https://vakatisubbu.xyz/ Successfully brought the domain

Step8: Please the endpoint url from the loadbalancer step5 active loadbalancer, these dns is http://

DNSName:

ccit-loadbalancer-1607206506.eu-west-2.elb.amazonaws.com

                                                            Route53

Route 53 >Hosted zones Create host zone ,give you domain name which was purchased in godaddy click create hosted zone

Created successful Hosted zone for the domain

Here click create record 

Click create record

Created record successfully.

We have create just domain today it will take 48 hour to complete, as of now, only came domain default page 

ASM certificate

Step1:

Step2: give you domain name ,click request

Step3:Click  Create record route 53

click create records

Step4:

one record is adding in the hosted zone

Step5: After Pending validation success ,you got one SSL certificate

Loader Balance Completed.

Step8: Delete the load balancer deleted, plan to create autoscaling

                                                              Auto Scaling 

Aws auto scaling monitors your applications and automatically adjusts capacity to maintain steady, predictable performance at the lowest possible cost.

Using AWS auto scaling, it’s easy to setup application scaling for multiple resources across multiple services in minutes.

Vertical: Able to increase the capacity of the instance called vertical, no down time required.

Horizontal scaling :Able increase the instances not capacity of the instance is called Horizonal scaling,

down time required.

Existing Target group Health checks success code 200,2 consecutive check unhealth means the instance is unhealthy ,which our autoscale trigger create one instance automatically.

Delete the existing Target group, Terminate three instance, We will create instance you launch template.

Step1:Create Launch Template

EC2>Launch template >create launch template given any name ccit-launchtemplate,

here im not setting network, plan to setup in autoscaling group

User data add you http script code click create launch template

Created templated, below showing default version 1,latest version 1, if you do any change on launch template again new version will create not replaced existing version.

Step2: Create Autoscaling group

Ec2>Auto scaling group >Create Auto scaling group