# Google Simple NVA Module
This module allows for the creation of a NVA (Network Virtual Appliance) to be used for experiments and as a stub for future appliances deployment.
This NVA can be used to interconnect up to 8 VPCs.
## Examples
### Simple example
```hcl
# Interfaces configuration
locals {
network_interfaces = [
{
addresses = null
name = "dev"
nat = false
network = "dev_vpc_self_link"
routes = ["10.128.0.0/9"]
subnetwork = "dev_vpc_nva_subnet_self_link"
},
{
addresses = null
name = "prod"
nat = false
network = "prod_vpc_self_link"
routes = ["10.0.0.0/9"]
subnetwork = "prod_vpc_nva_subnet_self_link"
}
}
# NVA config
module "nva-cloud-config" {
source = "../../../cloud-foundation-fabric/modules/cloud-config-container/simple-nva"
enable_health_checks = true
network_interfaces = local.network_interfaces
}
# COS VM
module "nva" {
source = "../../modules/compute-vm"
project_id = "myproject"
instance_type = "e2-standard-2"
name = "nva"
can_ip_forward = true
zone = "europe-west8-a"
tags = ["nva"]
network_interfaces = local.network_interfaces
boot_disk = {
image = "projects/cos-cloud/global/images/family/cos-stable"
size = 10
type = "pd-balanced"
}
metadata = {
user-data = module.nva-cloud-config.cloud_config
}
}
```
## Variables
| name | description | type | required | default |
|---|---|:---:|:---:|:---:|
| [network_interfaces](variables.tf#L29) | Network interfaces configuration. | list(object({…}))
| ✓ | |
| [cloud_config](variables.tf#L17) | Cloud config template path. If null default will be used. | string
| | null
|
| [enable_health_checks](variables.tf#L23) | Configures routing to enable responses to health check probes. | bool
| | false
|
| [test_instance](variables-instance.tf#L17) | Test/development instance attributes, leave null to skip creation. | object({…})
| | null
|
| [test_instance_defaults](variables-instance.tf#L30) | Test/development instance defaults used for optional configuration. If image is null, COS stable will be used. | object({…})
| | {…}
|
## Outputs
| name | description | sensitive |
|---|---|:---:|
| [cloud_config](outputs.tf#L17) | Rendered cloud-config file to be passed as user-data instance metadata. | |
| [test_instance](outputs-instance.tf#L17) | Optional test instance name and address. | |