AWS CloudFormation vs. Terraform

CloudFormation vs. Terraform | cloudonaut



https://ryaneschinger.com/blog/aws-cloudformation-vs-terraform/

CloudFormation: using JSON or YAML for templates

JSON

{
  "Parameters": {
    "KeyName": {
      "Description": "The EC2 Key Pair for SSH access",
      "Type": "AWS::EC2::KeyPair::KeyName"
    }
  },
  "Resources": {
    "CFExampleInstance": {
      "Type": "AWS::EC2::Instance",
      "Properties": {
        "SecurityGroups": [ { "Ref": "CFSSHAccess" } ],
        "KeyName": { "Ref": "KeyName" },
        "ImageId": "ami-0f4cfd64",
        "InstanceType": "t1.micro"
      }
    },
    "CFSSHAccess": {
      "Type": "AWS::EC2::SecurityGroup",
      "Properties": {
        "GroupDescription": "SSH access",
        "SecurityGroupIngress": [ {
          "IpProtocol": "tcp",
          "FromPort": "22",
          "ToPort": "22",
          "CidrIp": "0.0.0.0/0"
        } ]
      }
    }
  }
}

YAML

Parameters:
  KeyName:
    Description: The EC2 Key Pair for SSH access
    Type: AWS::EC2::KeyPair::KeyName
Resources:
  CFExampleInstance:
    Type: AWS::EC2::Instance
    Properties:
      SecurityGroups:
      - Ref: CFSSHAccess
      KeyName:
        Ref: KeyName
      ImageId: ami-0f4cfd64
      InstanceType: t1.micro
  CFSSHAccess:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: SSH access
      SecurityGroupIngress:
      - IpProtocol: tcp
        FromPort: '22'
        ToPort: '22'
        CidrIp: 0.0.0.0/0

Teraform custom syntax in HCL (HashiCorp Configuration Language)

variable "key_name" {}

resource "aws_instance" "TFExampleInstance" {
  ami = "ami-0f4cfd64"
  instance_type = "t1.micro"
  key_name = "${var.key_name}"
  security_groups = [ "${aws_security_group.TFSSHAccess.name}" ]
}

resource "aws_security_group" "TFSSHAccess" {
  name = "TFSSHAccess"
  description = "SSH access"

  ingress {
    protocol = "tcp"
    from_port = 22
    to_port = 22
    cidr_blocks = ["0.0.0.0/0"]
  }
}

Terraform vs CloudFormation - Alexander Savchuk - Medium

Your Infrastructure as Code 🌩 CloudFormation Vs Terraform?

@hackernoon

hashicorp/terraform @GitHub

Terraform enables you to safely and predictably create, change, and improve infrastructure. It is an open source tool that codifies APIs into declarative configuration files that can be shared amongst team members, treated as code, edited, reviewed, and versioned. https://www.terraform.io/