Lab 13:To configure Auto Scaling With Load Balancer

                                   Lab 13:To configure Auto Scaling With Load Balancer

Objective:To configure Auto scaling in AWS

Topology:

Pre-Requites:

User should have AWS account ,or IAM user with EC2fullaccess

TASK:

Launch Amazon linux instance

configure web server 

stop the instance 

create AMI image of above instance

Configure Autoscaling  launch configuration and autoscaling group

Configure Load Balancer with Auto scaling

 

practical steps

1. First Launch Amazon linux instance and configure webserver

2.Create AMI from this instance

To create  AMI from this instance

On Ec2 Dashboard "panel

Select  the instance 

click on Action button

Select instance state 

click stop

Click on yes stop button

select the stopped instance

Click on Action button

Select image 

Click on create image button

For image name-------------->mywebing

For image description-------->webimg

Leave remaining default

Click on create image button

click on close button

verify AMI created 

on the EC2  Dashboard  panel

Select IMAGES

Click on AMIs

click on status is Available

3.To configure Auto scaling

On the EC2 Dashboard panel

select "Auto scaling "

click on "Launch configuration"

click on "Create launch configuration"button

Click on"Create launch Configuration"button

click on "MY AMI"

select the AMI which was created with webserver

click on select button

choose instance Type,

General purpose ,t2,micro free tier

Click on Next:Configuration Details

On create launch configuration page

Name-------------->mylaunchconf

Monitoring------->Enable check box

Click on Next:Add storage button

By default linux takes 8 Gb EBS  volumn

Leave all values as default

Click on "Next :Configures security Group"button

On create Launch configuration page 

Select "create a new security Group"

Click on Review

Check the summary

click on " create launch configuration"button

on"select an existing key pair or create a new key pair "page

Select " choose an existing key pair"

select a key pair ----->student

select Acknowledge check box

click on "create launch configuration"button

On "create Auto scaling Group",page ,give values as

Launch configuration ----->mylaunchconf

Group name----------------->myautoscalegrp

For Network---------------->select default

Select All subnet one by one

Click on "Next Configure scaling policies"button

On "create Auto scaling Group"page

Select "use scaling policies to adjust the capacity of this group"

Drag Down

Click on "scale the Auto scaling group using or similar scaling policies"

Select increase Group size 

Click on "Add new alarm"

click on "click topic"

on"create Alarm"box,give values as

send a notification to------------------>cpuutlizationabc

with this recipents-------------------->skmarhann999@gmail.com

whenever Average of cpu utilization

is>=------->30

click on "Create Alarm "button

for take the action--------Add1

Drag down and give Decrease policy parameters

In Decrease Group wizard

Click on "Add new alarm"

select the topic "cpuutilization"

Whenever Average  of cpu utilization is select "<="

Give the value -------->20

Click on "Create Alarm "button

 

Check the summary click on "Next :Configure Notification"

click on "Add notification"button

Check the following output

click on "next:Configure tags"

For tag  key---->Name

for tag value --------->Web Autoscale

click on Review button

Check the summary 

Drag Down

Drag Down

Click on "Create Auto scaling group"button

Successfully created

Click on Close button

Verification

Now go to EC2 Dashbord

Click on instance 

observer that webAutosclae instance got launched

Now login to Web Autoscale instance

Run the following command to increase the load

#yum install stress

#stress --cpu  --timeout 1000

verification

After 15 minutes 3 instance got loaded automatically