# Overview
This module performs the following tasks:

- Create VPC, vpcflow log
- Create subnets in every AZ
- Create IGW, NGW
- Create s3 and ddb endpoints which are free

## Subnet addressing

Subnet cidrs needs to be specified manually

## Inputs:

| Name                            | Description                                       | Type          | Default | Required |
|---------------------------------|---------------------------------------------------|---------------|---------|----------|
| private-subnet-cidrs            | private subnets                                   | list          | []      | yes      |
| public-subnet-cidrs             | public subnets                                    | list          | []      | yes      |
| create-nat-gateway              | whether to deploy NAT gateway for private subnets | bool          | true    | yes      |
| vpc-cidr                        | VPC cidr                                          | string        | none    | yes      |
| enable-flowlog                  | whether to enable vpc flowlog                     | bool          | true    | yes      |
| vpcflowlog-retain-days          | number of days to retain vpc cloudwatch log       | number        | 90      | yes      |
| vpcflowlog-cwl-loggroup-key-arn | kms key alias arn for log group encryption        | string        | none    | yes      |
| secondary_cidr_blocks           | Additional CIDR blocks to be associated with VPC  | list(string)  | none    | no       | 
| resource-prefix                 | Prefix of resource name                           | string        | ""      | yes      |


## Outputs:

| Name                  | Description             | Type    |
|-----------------------|-------------------------|---------|
| vpc_id                | vpc id                  | string  |
| public_subnets        | list of cidr blocks     | list    |
| private_subnets       | list of cidr blocks     | list    |
| secondary_cidr_blocks | list of secondary cidrs | list    |

## Example:

```hcl
module "vpc-subnets" {
  source = "../../modules/networking/vpc-subnet-manual"

  resource-prefix                 = local.resource-prefix
  private-subnet-cidrs            = ["172.17.0.0/24", "172.17.1.0/24"]
  public-subnet-cidrs             = ["172.17.10.0/24", "172.17.11.0/24"]
  vpc-cidr                        = "172.17.0.0/16"
  enable-flow-log                 = false
  vpcflowlog-cwl-loggroup-key-arn = ""
  create-nat-gateway              = true
  create-free-vpc-endpoints       = true
}
```