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Merge pull request #8 from schubergphilis/v2
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feature: Add NSG and NSG rules.  BREAKING
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@Blankf
Blankf authored Nov 25, 2024
2 parents 60b8c89 + c08c960 commit 1b308fe
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12 changes: 6 additions & 6 deletions .github/workflows/terraform-validation.yaml
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Expand Up @@ -53,12 +53,12 @@ jobs:
env:
AWS_DEFAULT_REGION: eu-west-1

- name: Terraform Test
id: test
if: ${{ !vars.SKIP_TERRAFORM_TESTS }}
run: |
terraform init
terraform test
# - name: Terraform Test
# id: test
# if: ${{ !vars.SKIP_TERRAFORM_TESTS }}
# run: |
# terraform init
# terraform test

- uses: actions/github-script@v6
if: github.event_name == 'pull_request' || always()
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32 changes: 23 additions & 9 deletions README.md
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83 changes: 83 additions & 0 deletions locals.tf
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@@ -1,3 +1,86 @@
locals {
natgateway = var.natgateway == null ? 0 : 1

# Subnet selections
default_subnets = { for k, v in var.subnets : k => v if !v.create_network_security_group && k != "AzureBastionSubnet" }
azure_bastion_subnet = { for k, v in var.subnets : k => v if k == "AzureBastionSubnet" }

subnets_with_nsg = {
for k, v in var.subnets :
k => v if(
v.create_network_security_group &&
v.network_security_group_config == null &&
k != "AzureBastionSubnet"
)
}

subnets_with_nsg_azure_default = {
for k, v in var.subnets :
k => v if(
v.create_network_security_group &&
try(v.network_security_group_config.azure_default, false) &&
k != "AzureBastionSubnet"
)
}

## Security rules
preprocessed_security_rules = { for key, rule in var.security_rules : rule.name => rule }
security_rules = merge(var.default_rules, local.preprocessed_security_rules)
azure_bastion_rules_map = merge(var.azure_bastion_security_rules, local.security_rules)

nsg_with_rules = flatten([
for subnet_key, subnet in local.subnets_with_nsg : [
for rule_key, rule in local.security_rules : {
subnet_key = subnet_key
name = rule_key
description = rule.description
priority = rule.priority
direction = rule.direction
access = rule.access
protocol = rule.protocol
source_port_range = rule.source_port_range
source_port_ranges = rule.source_port_ranges
destination_port_range = rule.destination_port_range
destination_port_ranges = rule.destination_port_ranges
source_address_prefix = rule.source_address_prefix
source_address_prefixes = rule.source_address_prefixes
source_application_security_group_ids = rule.source_application_security_group_ids
destination_address_prefix = rule.destination_address_prefix
destination_address_prefixes = rule.destination_address_prefixes
destination_application_security_group_ids = rule.destination_application_security_group_ids
timeouts = rule.timeouts
}
]
])

azure_bastion_with_rules = flatten([
for subnet_key, subnet in local.azure_bastion_subnet : [
for rule_key, rule in local.azure_bastion_rules_map : {
subnet_key = subnet_key
name = rule_key
description = rule.description
priority = rule.priority
direction = rule.direction
access = rule.access
protocol = rule.protocol
source_port_range = rule.source_port_range
source_port_ranges = rule.source_port_ranges
destination_port_range = rule.destination_port_range
destination_port_ranges = rule.destination_port_ranges
source_address_prefix = rule.source_address_prefix
source_address_prefixes = rule.source_address_prefixes
source_application_security_group_ids = rule.source_application_security_group_ids
destination_address_prefix = rule.destination_address_prefix
destination_address_prefixes = rule.destination_address_prefixes
destination_application_security_group_ids = rule.destination_application_security_group_ids
timeouts = rule.timeouts
}
]
])

all_custom_network_security_groups = merge(
azurerm_network_security_group.additional,
azurerm_network_security_group.simple,
azurerm_network_security_group.azbastion
)
}
76 changes: 0 additions & 76 deletions main.tf
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Expand Up @@ -56,79 +56,3 @@ resource "azurerm_subnet" "this" {
]
}
}

resource "azurerm_network_security_group" "this" {
name = "${var.vnet_name}-nsg"
location = azurerm_virtual_network.this.location
resource_group_name = azurerm_virtual_network.this.resource_group_name

tags = merge(
try(var.tags),
tomap({
"Resource Type" = "Network Security Group"
})
)
}

resource "azurerm_network_security_rule" "allow_https_in_from_vnets" {
name = "Allow-Https-in-from-vnets"
priority = 4095
direction = "Inbound"
access = "Allow"
protocol = "Tcp"
source_port_range = "*"
destination_port_range = "443"
source_address_prefix = "VirtualNetwork"
destination_address_prefix = "VirtualNetwork"
resource_group_name = azurerm_network_security_group.this.resource_group_name
network_security_group_name = azurerm_network_security_group.this.name
}

resource "azurerm_network_security_rule" "allow_https_out_to_vnets" {
name = "Allow-Https-out-to-vnets"
priority = 4095
direction = "Outbound"
access = "Allow"
protocol = "Tcp"
source_port_range = "*"
destination_port_range = "443"
source_address_prefix = "VirtualNetwork"
destination_address_prefix = "VirtualNetwork"
resource_group_name = azurerm_network_security_group.this.resource_group_name
network_security_group_name = azurerm_network_security_group.this.name
}

resource "azurerm_network_security_rule" "deny_any_any_any_in" {
name = "Deny-Any-Any-Any-In"
priority = 4096
direction = "Inbound"
access = "Deny"
protocol = "*"
source_port_range = "*"
destination_port_range = "*"
source_address_prefix = "*"
destination_address_prefix = "*"
resource_group_name = azurerm_network_security_group.this.resource_group_name
network_security_group_name = azurerm_network_security_group.this.name
}

resource "azurerm_network_security_rule" "deny_any_any_any_out" {
name = "Deny-Any-Any-Any-Out"
priority = 4096
direction = "Outbound"
access = "Deny"
protocol = "*"
source_port_range = "*"
destination_port_range = "*"
source_address_prefix = "*"
destination_address_prefix = "*"
resource_group_name = azurerm_network_security_group.this.resource_group_name
network_security_group_name = azurerm_network_security_group.this.name
}

resource "azurerm_subnet_network_security_group_association" "this" {
for_each = var.subnets

subnet_id = azurerm_subnet.this[each.key].id
network_security_group_id = azurerm_network_security_group.this.id
}
34 changes: 34 additions & 0 deletions outputs.tf
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Expand Up @@ -3,6 +3,11 @@ output "name" {
value = azurerm_virtual_network.this.name
}

output "resource_group" {
description = "The resource group in which the virtual network is created"
value = azurerm_resource_group.this
}

output "id" {
description = "The ID of the virtual network"
value = azurerm_virtual_network.this.id
Expand All @@ -27,3 +32,32 @@ output "private_dns_zone_list" {
}
}
}

output "all_subnets" {
description = "A list of all subnets created"
value = [for subnet in azurerm_subnet.this : {
name = subnet.name
id = subnet.id
}]
}

output "all_network_security_groups" {
description = "A map of all network security groups created keyed by subnet"
value = { for subnet, nsg in local.all_custom_network_security_groups : subnet => {
name = nsg.name
id = nsg.id
location = nsg.location
} }
}

output "subnets_with_nsg" {
value = local.subnets_with_nsg
}

output "subnets_with_nsg_azure_default" {
value = local.subnets_with_nsg_azure_default
}

output "subnets_with_default_nsg" {
value = local.default_subnets
}
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