Create Aws Cloudformation Ec2 t2.micro Template - aws-cloudformation

Question

I would like to create a CloudFormation template whose instance type is "t2.micro". However, i couldn't find any example about this instance type. Ec2 whose type is "t2.micro" needs VPC, etc.
Thanks.

Answer 1

You can make use the following template snippet.
It will output the EC2 instance Public DNS name.
Note: I haven't tested this template!
{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "CloudFormation template for creating an ec2 instance",
"Parameters": {
"KeyName": {
"Description": "Key Pair name",
"Type": "AWS::EC2::KeyPair::KeyName",
"Default": "my_keypair_name"
},
"VPC": {
"Type": "AWS::EC2::VPC",
"Properties":{
"CidrBlock": "10.0.0.0/16",
"EnableDnsHostnames": "true"
}
},
"Subnet":{
"Type": "AWS::EC2::Subnet",
"Properties": {
"VpcId": {"Ref": "VPC"},
"CidrBlock": "10.0.0.0/24",
"AvailabilityZone": "us-east-1a"
}
},
"InstanceType": {
"Description": "Select one of the possible instance types",
"Type": "String",
"Default": "t2.micro",
"AllowedValues": ["t2.micro", "t2.small", "t2.medium"]
}
},
"Resources":{
"SecurityGroup":{
"Type": "AWS::EC2::SecurityGroup",
"Properties": {
"GroupDescription": "My security group",
"VpcId": {"Ref": "VPC"},
"SecurityGroupIngress": [{
"CidrIp": "0.0.0.0/0",
"FromPort": 22,
"IpProtocol": "tcp",
"ToPort": 22
}]
}
},
"Server": {
"Type": "AWS::EC2::Instance",
"Properties": {
"ImageId": "ami-123456",
"InstanceType": {"Ref": "InstanceType"},
"KeyName": {"Ref": "KeyName"},
"SecurityGroupIds": [{"Ref": "SecurityGroup"}],
"SubnetId": {"Ref": "Subnet"}
}
}
},
"Outputs": {
"PublicName": {
"Value": {"Fn::GetAtt": ["Server", "PublicDnsName"]},
"Description": "Public name (connect via SSH)"
}
}
}
For more information see: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-template-resource-type-ref.html

Answer 2

Below stack allows to create EC2 instance, just specify parameters like VPC id,Subnet Id, SG id, instance type, also ami id , for instance type u can define in this it is t2,micro by default. This Is sucessfully tested and running w/o errors.kindly comment if you have any queries.######Created by MARK Machines
So is this,:
{"Description": "CloudFormation template for creating an ec2 instance",
"Parameters": {
"KeyName": {
"Description": "Key Pair name",
"Type": "AWS::EC2::KeyPair::KeyName",
"Default": "xxx-xxx"
},
"VPC": {
"Type": "AWS::EC2::VPC::Id",
"Default":"givevpcid"
},
"Subnet":{
"Type": "AWS::EC2::Subnet::Id",
"Default": "givesubnetid"
},
"InstanceType": {
"Description": "Select one of the possible instance types",
"Type": "String",
"Default": "t2.micro",
"AllowedValues": ["t2.micro", "t2.small", "t2.medium"]
},
"SecurityGroup":{
"Type": "AWS::EC2::SecurityGroup::Id",
"Default" : "givesecuritygroupid",
"AllowedValues": ["sg-xxxxx", "sg-yyy", "sg-zzz"]
}
},
"Resources":{
"Server": {
"Type": "AWS::EC2::Instance",
"Properties": {
"ImageId": "ami-098789xxxxxxxxx",
"InstanceType": {"Ref": "InstanceType"},
"KeyName": {"Ref": "KeyName"},
"SecurityGroupIds": [{"Ref": "SecurityGroup"}],
"SubnetId": {"Ref": "Subnet"}
}
}
},
"Outputs": {
"PublicName": {
"Value": {"Fn::GetAtt": ["Server", "PublicDnsName"]},
"Description": "Public name (connect via SSH)"
}
}
}

Answer 3

You can use my following template which works fine.
single-instance.yml
AWSTemplateFormatVersion: 2010-09-09
Description: >-
AWS CloudFormation Sample Template EC2InstanceWithSecurityGroupSample: Create
an Amazon EC2 instance running the Amazon Linux AMI. The AMI is chosen based
on the region in which the stack is run. This example creates an EC2 security
group for the instance to give you SSH access. **WARNING** This template
creates an Amazon EC2 instance. You will be billed for the AWS resources used
if you create a stack from this template.
Parameters:
KeyName:
Description: Name of an existing EC2 KeyPair to enable SSH access to the instance
Type: 'AWS::EC2::KeyPair::KeyName'
ConstraintDescription: must be the name of an existing EC2 KeyPair.
InstanceType:
Description: WebServer EC2 instance type
Type: String
Default: t2.micro
ConstraintDescription: must be a valid EC2 instance type.
SSHLocation:
Description: The IP address range that can be used to SSH to the EC2 instances
Type: String
MinLength: '9'
MaxLength: '18'
Default: 0.0.0.0/0
AllowedPattern: '(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/(\d{1,2})'
ConstraintDescription: must be a valid IP CIDR range of the form x.x.x.x/x.
Mappings:
AWSInstanceType2Arch:
t2.micro:
Arch: HVM64
AWSInstanceType2NATArch:
t2.micro:
Arch: NATHVM64
AWSRegionArch2AMI:
us-east-1:
HVM64: ami-0080e4c5bc078760e
HVMG2: ami-0aeb704d503081ea6
Resources:
EC2Instance:
Type: 'AWS::EC2::Instance'
Properties:
InstanceType: !Ref InstanceType
SecurityGroups:
- !Ref InstanceSecurityGroup
KeyName: !Ref KeyName
ImageId: !FindInMap
- AWSRegionArch2AMI
- !Ref 'AWS::Region'
- !FindInMap
- AWSInstanceType2Arch
- !Ref InstanceType
- Arch
InstanceSecurityGroup:
Type: 'AWS::EC2::SecurityGroup'
Properties:
GroupDescription: Enable SSH access via port 22
SecurityGroupIngress:
- IpProtocol: tcp
FromPort: '22'
ToPort: '22'
CidrIp: !Ref SSHLocation
Outputs:
InstanceId:
Description: InstanceId of the newly created EC2 instance
Value: !Ref EC2Instance
AZ:
Description: Availability Zone of the newly created EC2 instance
Value: !GetAtt
- EC2Instance
- AvailabilityZone
PublicDNS:
Description: Public DNSName of the newly created EC2 instance
Value: !GetAtt
- EC2Instance
- PublicDnsName
PublicIP:
Description: Public IP address of the newly created EC2 instance
Value: !GetAtt
- EC2Instance
- PublicIp
Then Run Following Command:
aws cloudformation create-stack --template-body file://single-instance.yml --stack-name single-instance --parameters ParameterKey=KeyName,ParameterValue=sample ParameterKey=InstanceType,ParameterValue=t2.micro