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vpc.tf
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vpc.tf
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#creating VPC
resource "aws_vpc" "vpc" {
cidr_block = var.vpc_cidr
tags = {
Name = "my-vpc"
}
}
#creating subnets inside the above-created vpc
resource "aws_subnet" "sbnt" {
count = length(var.subnets_cidr) #number of times the block will run is equal to length of subnet's_cidr list
vpc_id = aws_vpc.vpc.id
/*when block runs for first time, first value form list subnet's_cidr will be passed and
when block runs for second time second value form list subnet's_cidr will be passed*/
cidr_block = element(var.subnets_cidr , count.index)
availability_zone = element(var.availability_zones , count.index)
map_public_ip_on_launch = true
tags = {
Name = "My-Subnet-${count.index + 1}"
}
}
#creating internet gateway for our subnets to be able to connect to internet
resource "aws_internet_gateway" "igw" {
vpc_id = aws_vpc.vpc.id
tags = {
Name = "My-IGW"
}
}
#creating route table
resource "aws_route_table" "rt" {
vpc_id = aws_vpc.vpc.id
route {
cidr_block = "0.0.0.0/0"
gateway_id = aws_internet_gateway.igw.id
}
tags = {
Name = "My-Public-Routing-Table"
}
}
#attaching route table to subnets created so that they can have access to internet.
resource "aws_route_table_association" "a" {
count = length(var.subnets_cidr)
subnet_id = element(aws_subnet.sbnt.*.id , count.index)
route_table_id = aws_route_table.rt.id
}