MultiCloud Classroom notes 18/Feb/2026

Reusable Parameterized CloudFormation Template (JSON)

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "create ec2 instance with secuirt group",
    "Parameters": {
        "sgName": {
            "Description": "ec2-secuiry-group",
            "Type": "String",
            "Default": "mysq"
        },
        "vpcid": {
            "Description": "vpc id",
            "Type": "AWS::EC2::VPC::Id",
            "Default": "-"
        },
        
        "keypair": {
            "Description": "-",
            "Type": "AWS::EC2::KeyPair::KeyName",
            "Default": "-"
        }
        
        
    },
    "Resources": {
        "mysq1": {
            "Type": "AWS::EC2::SecurityGroup",
            "Properties": {
                "GroupDescription": "ec2-sq-allow-ssh-http,httpd",
                "SecurityGroupIngress": [
                    {
                        "IpProtocol": "tcp",
                        "FromPort": 80,
                        "ToPort": 80,
                        "CidrIp": "0.0.0.0/0"
                    },
                    {
                        "IpProtocol": "tcp",
                        "FromPort": 22,
                        "ToPort": 22,
                        "CidrIp": "0.0.0.0/0"
                    }
                ],
                "VpcId": {
                    "Ref": "vpcid"
                },
                "Tags": [
                    {
                        "Key": "enviroment",
                        "Value": "dev"
                    }
                ]
            }
        },
        
        "ec2instance1": {
            "Type": "AWS::EC2::Instance",
            "DependsOn": ["mysq1"],
            "Properties": {
                "KeyName": 
                { "Ref": "keypair" }
                ,
                "ImageId": "ami-0b6c6ebed2801a5cb", 
                "InstanceType": "t3.micro",
                "Monitoring": "false",
                "SecurityGroupIds" : [
                { "Ref": "mysq1" }
                ]
                ,
                "Tags": [
                    {
                        "Key": "enviroment",
                        "Value": "dev"
                    }
                ],
                "UserData": {
                    "Fn::Base64": {
                        "Fn::Join": [
                            "",
                            [
                                "#!/bin/bash -ex",
                                "sudo apt-get update && sudo apt-get install apache2 -y"
                            ]
                        ]
                    }
                }
        }
                }
    }
}