AWS CloudFormation Exercise 3: Classic Load Balancer creation

Exercise 3: Cloud Formation Template for Classic Load Balancer

In This Exercise, we are going to create internet facing Classic Load Balancer using the Cloud Formation Template written in YAML format. For this exercise, we need to keep few things ready.
1.   VPC (Default or Custom)
2.   Public Subnets
3.   Security Group
We are going to create a load balancer in Mumbai Region (ap-south-1), so we have configured VPC with public subnets (already configured in case of the default VPC) and the security group is configured with Port 80 inbound, we need to select subnets for each Availability Zone so that load balancer would route traffic to those subnets.

To get the Stack click on the link:- Without SSL or With SSL and save it to server say under /opt directory. 

1.   Login to AWS Management Console. AWS Console

2.   On Management Console click on “Cloud Formation” under the “Management and Governance” section.

3.   Now you will land on Cloud Formation Console. In Cloud Formation Console click on the “Create Stack” button.

Now follow the below steps to create a stack for this exercise

Step 1: Specify template

In this section choose the “Template is Ready” button and select “Upload a template file”. Now choose a file to upload from your personal computer where it is saved and upload. Now click on next.

Step 2: Specify stack details

Now Specify “Stack name” for e.g. Say “CLBStack” for this exercise. Now provide the values for parameters need to create Classic LoadBalancer stack, here we are giving the below parameter values.

1. MySubnetId: subnet-xxxxxxxxxx, subnet-xxxxxxxxxx, subnet-xxxxxxxxxx (Values to be replace)

2. MyELBSecurityGroups: sg-xxxxxxxxxx(Value to be replace)

Step 3: Configure stack options

On the “Configure stack options” page leave all settings default and click on next.

Step 4: Review Stack

In this step review all the settings that you have filled in and then click create stack.

After some time stack will be created and you can view and access resources created by the cloud formation stack.

Click below to get started

Create Stack

 

We can also create a stack using AWS CLI

AWS CLI for creating stack:

Note: Replace Template file name accordingly.

1.   To validate cloud formation template template

#aws cloudformation validate-template --template-body file:///<path-to-file>/ CFNCreateCLBwithOutput.yml

2.   To create stack

#aws cloudformation create-stack --stack-name CLBStack --template-body

file:///<path-to-file>/CFNCreateCLBwithOutput.yml --parameters

ParameterKey=MyELBSecurityGroup,ParameterValue=sg-xxxxxxxxxx

ParameterKey=MySubnetId,ParameterValue=subnet-xxxxxxxxxx\\,subnet-xxxxxxxxxx\\,subnet-xxxxxxxxxx

3.   To describe stack

#aws cloudformation describe-stacks --stack-name CLBStack

4.   To view the stack events

#aws cloudformation describe-stack-events --stack-name CLBStack

5.   To delete the stack

#aws cloudformation delete-stack --stack-name CLBStack

This completes internet facing Classic LoadBalancer using a cloud formation template with various parameters.