terraform-azurerm-network-security-group

Create a network security group

This Terraform module deploys a Network Security Group (NSG) in Azure and optionally attach it to the specified vnets.

This module is a complement to the Azure Network module. Use the network_security_group_id from the output of this module to apply it to a subnet in the Azure Network module. NOTE: We are working on adding the support for applying a NSG to a network interface directly as a future enhancement.

This module includes a a set of pre-defined rules for commonly used protocols (for example HTTP or ActiveDirectory) that can be used directly in their corresponding modules or as independent rules.

Usage with the generic module

The following example demonstrate how to use the network-security-group module with a combination of predefined and custom rules.

module "network-security-group" {
    source                     = "Azure/network-security-group/azurerm"
    resource_group_name        = "nsg-resource-group"
    location                   = "westus"
    security_group_name        = "nsg"
    predefined_rules           = [
      {
        name                   = "SSH"
        priority               = "500"
        source_address_prefix  = ["10.0.3.0/24"]
      },
      {
        name                   = "LDAP"
        source_port_range      = "1024-1026"
      }
    ]
    custom_rules               = [
      {
        name                   = "myhttp"
        priority               = "200"
        direction              = "Inbound"
        access                 = "Allow"
        protocol               = "tcp"
        destination_port_range = "8080"
        description            = "description-myhttp"
      }
    ]
    tags                       = {
                                   environment = "dev"
                                   costcenter  = "it"
                                 }
}

Usage with the pre-defined module

The following example demonstrate how to use the pre-defined HTTP module with a custom rule for ssh.

module "network-security-group" {
    source                     = "Azure/network-security-group/azurerm//modules/HTTP"
    resource_group_name        = "nsg-resource-group"
    location                   = "westus"
    security_group_name        = "nsg"
    custom_rules               = [
      {
        name                   = "ssh"
        priority               = "200"
        direction              = "Inbound"
        access                 = "Allow"
        protocol               = "tcp"
        destination_port_range = "22"
        source_address_prefix  = ["VirtualNetwork"]
        description            = "ssh-for-vm-management"
      }
    ]
    tags                       = {
                                  environment = "dev"
                                  costcenter  = "it"
                                 }
}

Test

Configurations

• Configure Terraform for Azure

We provide 2 ways to build, run, and test the module on a local development machine. Native (Mac/Linux) or Docker.

Native (Mac/Linux)

Prerequisites

• Ruby (~> 2.3)
• Bundler (~> 1.15)
• Terraform (~> 0.11.7)
• Golang (~> 1.10.3)

Environment setup

We provide simple script to quickly set up module development environment:

$ curl -sSL https://raw.githubusercontent.com/Azure/terramodtest/master/tool/env_setup.sh | sudo bash

Run test

Then simply run it in local shell:

$ cd $GOPATH/src/{directory_name}/
$ bundle install
$ rake build
$ rake e2e

Docker

We provide a Dockerfile to build a new image based FROM the microsoft/terraform-test Docker hub image which adds additional tools / packages specific for this module (see Custom Image section). Alternatively use only the microsoft/terraform-test Docker hub image by using these instructions.

Prerequisites

• Docker

Custom Image

This builds the custom image:

$ docker build --build-arg BUILD_ARM_SUBSCRIPTION_ID=$ARM_SUBSCRIPTION_ID --build-arg BUILD_ARM_CLIENT_ID=$ARM_CLIENT_ID --build-arg BUILD_ARM_CLIENT_SECRET=$ARM_CLIENT_SECRET --build-arg BUILD_ARM_TENANT_ID=$ARM_TENANT_ID -t azure-network-security-group .

This runs the build and unit tests:

$ docker run --rm azure-network-security-group /bin/bash -c "bundle install && rake build"

This runs the end to end tests:

$ docker run --rm azure-network-security-group /bin/bash -c "bundle install && rake e2e"

This runs the full tests:

$ docker run --rm azure-network-security-group /bin/bash -c "bundle install && rake full"

Authors

Originally created by Damien Caro and Richard Guthrie.

Contributing

This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.microsoft.com.

When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact [email protected] with any additional questions or comments.

License

MIT