How to create an Ec2 instance using aws cloudformation using yaml template?

 In this blog, you will learn how to create an ec2 using aws cloudformation yaml template.

In AWS, you can deploy any resource as infra as a code using AWS cloudformation templates using YAML or JSON language.

First, you must know the template anatomy for publishing cloudformation template.

The following describes the aws cloudformation yaml fragment.

AWSTemplateFormatVersion: "version date"

Description:

Metadata:

Parameters:

Rules:

Mappings:

Conditions:

Transform:

Resources:

Outputs:

from the above template anatomy ,  AwsTemplateFormaVersion, Resources  are must be defined in the cloud formation template.

the remaining sections are default.

from the below the cloudformation template ,  you can learn how to create an ec2 instance using aws cloudformaion template using yaml languate.

AWSTemplateFormatVersion: 2010-09-09
Description: deploy a vpc and subnet using aws cloudformation template
Resources:
myactivtyVPC:
Type: AWS::EC2::VPC
Properties:
CidrBlock: 10.0.0.0/16
EnableDnsSupport: 'true'
EnableDnsHostnames: 'true'
Tags:
-
Key: Name
Value: myVPC
myactivitySubnet:
Type: AWS::EC2::Subnet
Properties:
VpcId: !Ref myactivtyVPC
CidrBlock: 10.0.1.0/16
AvailabilityZone: "eu-west-1a"
Tags:
-
Key: Name
Value: mySubnet

# define a internet gateway using aws cloudformation
myactivityIGW:
Type: AWS::EC2::InternetGateway
Properties:
Tags:
-
Key: Name
Value: myIGW

myVPCGatewayAttachment:
Type: AWS::EC2::VPCGatewayAttachment
Properties:
VpcId: !Ref myactivtyVPC
InternetGatewayId: !Ref myactivityIGW

#define a route table
myRTB:
Type: AWS::EC2::RouteTable
Properties:
VpcId: !Ref myactivtyVPC
Tags:
-
Key: Name
Value: myRTB
myInternetRoute:
Type: AWS::EC2::Route
DependsOn: myactivityIGW
Properties:
RouteTableId: !Ref myRTB
DestinationCidrBlock: 0.0.0.0/0
GatewayId: !Ref myactivityIGW
myRTBSubnetAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
SubnetId: !Ref myactivitySubnet
RouteTableId: !Ref myRTB

#lanuch a ec2 instance

myEc2Instance:
Type: AWS::EC2::Instance
Properties:
ImageId: ami-07355fe79b493752d
InstanceType: t2.micro
KeyName: pubLINUXkey
SubnetId: !Ref myactivitySubnet