How To Create A Custom VPC Using AWS CLI

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# Configure AWS CLI
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aws configure
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#AWS Access Key ID [None]: # Enter your access key here
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#AWS Secret Access Key [None]: # Enter your secret key here
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#Default region name [None]: # Enter your region here
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#Default output format [None]: # Enter your output format here

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# Get help for aws commands
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aws help
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# aws [COMMAND] [SUB-COMMAND] help
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aws ec2 create-vpc help
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# Create a VPC
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AWS_VPC_INFO=$(aws ec2 create-vpc \
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--cidr-block 10.0.0.0/16 \
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--query 'Vpc.{VpcId:VpcId}' \
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--output text)

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# Modify your custom VPC and enable DNS hostname support
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aws ec2 modify-vpc-attribute \
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--vpc-id $AWS_VPC_INFO \
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--enable-dns-hostnames "{\"Value\":true}"

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# Create a public subnet
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AWS_SUBNET_PUBLIC=$(aws ec2 create-subnet \
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--vpc-id $AWS_VPC_INFO --cidr-block 10.0.1.0/24 \
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--availability-zone us-east-1a --query 'Subnet.{SubnetId:SubnetId}' \
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--output text)

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# Enable Auto-assign Public IP on the subnet
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aws ec2 modify-subnet-attribute \
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--subnet-id $AWS_SUBNET_PUBLIC \
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--map-public-ip-on-launch

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# Create an Internet Gateway
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AWS_INTERNET_GATEWAY=$(aws ec2 create-internet-gateway \
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--query 'InternetGateway.{InternetGatewayId:InternetGatewayId}' \
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--output text)

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# Attach the Internet gateway to your VPC
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aws ec2 attach-internet-gateway \
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--vpc-id $AWS_VPC_INFO \
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--internet-gateway-id $AWS_INTERNET_GATEWAY

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# Create a custom route table
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AWS_CUSTOM_ROUTE_TABLE=$(aws ec2 create-route-table \
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--vpc-id $AWS_VPC_INFO \
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--query 'RouteTable.{RouteTableId:RouteTableId}' \
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--output text )

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# Associate the subnet with route table, making it a public subnet
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AWS_ROUTE_TABLE_ASSOCITATION=$(aws ec2 associate-route-table  \
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--subnet-id $AWS_SUBNET_PUBLIC \
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--route-table-id $AWS_CUSTOM_ROUTE_TABLE \
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--output text)

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# Get security group ID’s
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AWS_DEFAULT_SECURITY_GROUP=$(aws ec2 describe-security-groups \
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--filters "Name=vpc-id,Values=$AWS_VPC_INFO" \
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--query 'SecurityGroups[?GroupName == `default`].GroupId' \
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--output text)
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AWS_CUSTOM_SECURITY_GROUP=$(aws ec2 describe-security-groups \
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--filters "Name=vpc-id,Values=$AWS_VPC_INFO" \
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--query 'SecurityGroups[?GroupName == `vpc-cli-lab-security-group`].GroupId' \
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--output text)

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# Add tags to the resources in your VPC
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# Add a tag to the VPC
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aws ec2 create-tags \
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--resources $AWS_VPC_INFO \
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--tags "Key=Name,Value=vpc-cli-lab"
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# Add a tag to public subnet
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aws ec2 create-tags \
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--resources $AWS_SUBNET_PUBLIC \
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--tags "Key=Name,Value=vpc-cli-lab-public-subnet"
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# Add a tag to the Internet-Gateway
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aws ec2 create-tags \
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--resources $AWS_INTERNET_GATEWAY \
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--tags "Key=Name,Value=vpc-cli-lab-internet-gateway"
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# Add a tag to the default route table
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AWS_DEFAULT_ROUTE_TABLE=$(aws ec2 describe-route-tables \
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--filters "Name=vpc-id,Values=$AWS_VPC_INFO" \
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--query 'RouteTables[?Associations[0].Main != `flase`].RouteTableId' \
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--output text)
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aws ec2 create-tags \
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--resources $AWS_DEFAULT_ROUTE_TABLE \
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--tags "Key=Name,Value=vpc-cli-lab-default-route-table"
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# Add a tag to the public route table
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aws ec2 create-tags \
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--resources $AWS_CUSTOM_ROUTE_TABLE \
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--tags "Key=Name,Value=vpc-cli-lab-public-route-table"
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# Add a tags to security groups
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aws ec2 create-tags \
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--resources $AWS_CUSTOM_SECURITY_GROUP \
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--tags "Key=Name,Value=vpc-cli-lab-security-group"
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aws ec2 create-tags \
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--resources $AWS_DEFAULT_SECURITY_GROUP \
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--tags "Key=Name,Value=vpc-cli-lab-default-security-group"

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# Delete custom security group
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aws ec2 delete-security-group \
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--group-id $AWS_CUSTOM_SECURITY_GROUP
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# Delete internet gateway
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aws ec2 detach-internet-gateway \
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--internet-gateway-id $AWS_INTERNET_GATEWAY \
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--vpc-id $AWS_VPC_INFO
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aws ec2 delete-internet-gateway \
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--internet-gateway-id $AWS_INTERNET_GATEWAY
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# Delete the custom route table
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aws ec2 disassociate-route-table \
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--association-id $AWS_ROUTE_TABLE_ASSOCITATION
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aws ec2 delete-route-table \
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--route-table-id $AWS_CUSTOM_ROUTE_TABLE
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# Delete the public subnet
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aws ec2 delete-subnet \
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--subnet-id $AWS_SUBNET_PUBLIC
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# Delete the vpc
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aws ec2 delete-vpc \
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--vpc-id $AWS_VPC_INFO