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documentation fix #335 and examples added for the Azure VNET peering and AWS Private Link (#340)
* added examples for the Azure VNET peering and AWS Private Link * typo fix as mentioned in #335 * fix Readme.md with Terraform version
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‎examples/aws-atlas-privatelink/Readme.md‎

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# Example - AWS and Atlas PrivateLink with Terraform
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This project aims to provide a very straight-forward example of setting up PrivateLink connection between AWS and MongoDB Atlas.
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## Dependencies
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* Terraform v0.13
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* An AWS account - provider.aws: version = "~> 3.3"
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* A MongoDB Atlas account - provider.mongodbatlas: version = "~> 0.6"
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## Usage
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**1\. Ensure your AWS and MongoDB Atlas credentials are set up.**
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This can be done using environment variables:
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``` bash
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$ export AWS_SECRET_ACCESS_KEY='your secret key'
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$ export AWS_ACCESS_KEY_ID='your key id'
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```
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```bash
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export MONGODB_ATLAS_PUBLIC_KEY="xxxx"
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export MONGODB_ATLAS_PRIVATE_KEY="xxxx"
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```
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... or the `~/.aws/credentials` file.
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```
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$ cat ~/.aws/credentials
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[default]
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aws_access_key_id = your key id
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aws_secret_access_key = your secret key
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```
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... or follow as in the `variables.tf` file and create **terraform.tfvars** file with all the variable values and make sure **not to commit it**.
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**2\. Review the Terraform plan.**
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Execute the below command and ensure you are happy with the plan.
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``` bash
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$ terraform plan
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```
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This project currently does the below deployments:
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- MongoDB cluster - M10
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- AWS Custom VPC, Internet Gateway, Route Tables, Subnets with Public and Private access
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- PrivateLink Connection at MongoDB Atlas
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- Create VPC Endpoint in AWS
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**3\. Configure the security group as required.**
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The security group in this configuration allows All Traffic access in Inbound and Outbound Rules.
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**4\. Execute the Terraform apply.**
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Now execute the plan to provision the AWS and Atlas resources.
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``` bash
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$ terraform apply
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```
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**5\. Destroy the resources.**
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Once you are finished your testing, ensure you destroy the resources to avoid unnecessary charges.
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``` bash
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$ terraform destroy
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```
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**Important Point**
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To fetch the connection string follow the below steps:
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```
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output "atlasclusterstring" {
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value = mongodbatlas_cluster.cluster-atlas.connection_strings
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}
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```
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**Outputs:**
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```
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atlasclusterstring = [
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{
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"aws_private_link" = {
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"vpce-0ebb76559e8affc96" = "mongodb://pl-0-us-east-1.za3fb.mongodb.net:1024,pl-0-us-east-1.za3fb.mongodb.net:1025,pl-0-us-east-1.za3fb.mongodb.net:1026/?ssl=true&authSource=admin&replicaSet=atlas-d177ke-shard-0"
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}
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"aws_private_link_srv" = {
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"vpce-0ebb76559e8affc96" = "mongodb+srv://cluster-atlas-pl-0.za3fb.mongodb.net"
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}
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"private" = ""
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"private_srv" = ""
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"standard" = "mongodb://cluster-atlas-shard-00-00.za3fb.mongodb.net:27017,cluster-atlas-shard-00-01.za3fb.mongodb.net:27017,cluster-atlas-shard-00-02.za3fb.mongodb.net:27017/?ssl=true&authSource=admin&replicaSet=atlas-d177ke-shard-0"
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"standard_srv" = "mongodb+srv://cluster-atlas.za3fb.mongodb.net"
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},
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]
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```
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To fetch a particular connection string, use the **lookup()** function of terraform as below:
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```
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output "plstring" {
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value = lookup(mongodbatlas_cluster.cluster-atlas.connection_strings[0].aws_private_link_srv, aws_vpc_endpoint.ptfe_service.id)
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}
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```
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**Output:**
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```
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plstring = mongodb+srv://cluster-atlas-pl-0.za3fb.mongodb.net
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```

‎examples/aws-atlas-privatelink/atlas-cluster.tf‎

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resource "mongodbatlas_cluster" "cluster-atlas" {
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project_id = var.atlasprojectid
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name = "cluster-atlas"
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num_shards = 1
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replication_factor = 3
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provider_backup_enabled = true
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auto_scaling_disk_gb_enabled = true
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mongo_db_major_version = "4.2"
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//Provider settings
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provider_name = "AWS"
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disk_size_gb = 10
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provider_disk_iops = 100
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provider_volume_type = "STANDARD"
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provider_encrypt_ebs_volume = true
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provider_instance_size_name = "M10"
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provider_region_name = var.atlas_region
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}
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output "atlasclusterstring" {
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value = mongodbatlas_cluster.cluster-atlas.connection_strings
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}
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output "plstring" {
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value = lookup(mongodbatlas_cluster.cluster-atlas.connection_strings[0].aws_private_link_srv, aws_vpc_endpoint.ptfe_service.id)
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}

‎examples/aws-atlas-privatelink/atlas-pl.tf‎

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resource "mongodbatlas_private_endpoint" "atlaspl" {
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project_id = var.atlasprojectid
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provider_name = "AWS"
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region = var.aws_region
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}
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resource "aws_vpc_endpoint" "ptfe_service" {
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vpc_id = aws_vpc.primary.id
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service_name = mongodbatlas_private_endpoint.atlaspl.endpoint_service_name
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vpc_endpoint_type = "Interface"
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subnet_ids = [aws_subnet.primary-az1.id, aws_subnet.primary-az2.id]
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security_group_ids = [aws_security_group.primary_default.id]
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}
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resource "mongodbatlas_private_endpoint_interface_link" "atlaseplink" {
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project_id = mongodbatlas_private_endpoint.atlaspl.project_id
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private_link_id = mongodbatlas_private_endpoint.atlaspl.private_link_id
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interface_endpoint_id = aws_vpc_endpoint.ptfe_service.id
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}

‎examples/aws-atlas-privatelink/aws-vpc.tf‎

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//Create Primary VPC
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resource "aws_vpc" "primary" {
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cidr_block = "10.0.0.0/16"
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enable_dns_hostnames = true
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enable_dns_support = true
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}
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//Create IGW
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resource "aws_internet_gateway" "primary" {
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vpc_id = aws_vpc.primary.id
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}
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//Route Table
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resource "aws_route" "primary-internet_access" {
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route_table_id = aws_vpc.primary.main_route_table_id
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destination_cidr_block = "0.0.0.0/0"
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gateway_id = aws_internet_gateway.primary.id
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}
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//Subnet-A
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resource "aws_subnet" "primary-az1" {
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vpc_id = aws_vpc.primary.id
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cidr_block = "10.0.1.0/24"
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map_public_ip_on_launch = true
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availability_zone = "${var.aws_region}a"
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}
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//Subnet-B
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resource "aws_subnet" "primary-az2" {
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vpc_id = aws_vpc.primary.id
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cidr_block = "10.0.2.0/24"
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map_public_ip_on_launch = false
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availability_zone = "${var.aws_region}b"
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}
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/*Security-Group
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Ingress - Port 80 -- limited to instance
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Port 22 -- Open to ssh without limitations
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Egress - Open to All*/
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resource "aws_security_group" "primary_default" {
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name_prefix = "default-"
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description = "Default security group for all instances in ${aws_vpc.primary.id}"
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vpc_id = aws_vpc.primary.id
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ingress {
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from_port = 0
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to_port = 0
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protocol = "tcp"
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cidr_blocks = [
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"0.0.0.0/0",
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]
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}
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egress {
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from_port = 0
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to_port = 0
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protocol = "-1"
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cidr_blocks = ["0.0.0.0/0"]
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}
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}

‎examples/aws-atlas-privatelink/provider.tf‎

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provider "mongodbatlas" {
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public_key = var.public_key
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private_key = var.private_key
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}
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provider "aws" {
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access_key = var.access_key
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secret_key = var.secret_key
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region = var.aws_region
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}

‎examples/aws-atlas-privatelink/variables.tf‎

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variable "public_key" {
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description = "The public API key for MongoDB Atlas"
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}
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variable "private_key" {
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description = "The private API key for MongoDB Atlas"
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}
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variable "atlasprojectid" {
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description = "Atlas project ID"
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}
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variable "access_key" {
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description = "The access key for AWS Account"
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}
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variable "secret_key" {
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description = "The secret key for AWS Account"
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}
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variable "atlas_region" {
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default = "US_EAST_1"
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description = "Atlas Region"
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}
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variable "aws_region" {
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default = "us-east-1"
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description = "AWS Region"
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}
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variable "aws_account_id" {
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description = "My AWS Account ID"
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}
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variable "atlasorgid" {
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description = "Atlas Org ID"
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}
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variable "atlas_vpc_cidr" {
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description = "Atlas CIDR"
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}

‎examples/aws-atlas-privatelink/versions.tf‎

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terraform {
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required_providers {
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aws = {
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source = "hashicorp/aws"
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}
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mongodbatlas = {
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source = "terraform-providers/mongodbatlas"
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}
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}
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required_version = ">= 0.13"
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}

‎examples/mongodbatlas-azure-vnet-peering/Readme.md‎

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# Example - Microsoft Azure and MongoDB Atlas VNET Peering
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This project aims to provide an example of using Azure and MongoDB Atlas together.
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## Dependencies
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* Terraform v0.13
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* Microsoft Azure account
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* A MongoDB Atlas account
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```
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Terraform v0.13.0
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+ provider registry.terraform.io/hashicorp/azuread v1.0.0
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+ provider registry.terraform.io/hashicorp/azurerm v2.31.1
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+ provider registry.terraform.io/terraform-providers/mongodbatlas v0.6.5
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```
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## Usage
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**1\. Ensure your Azure credentials are set up.**
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1. Install the Azure CLI by following the steps from the [official Azure documentation](https://docs.microsoft.com/en-us/cli/azure/install-azure-cli).
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2. Run the command `az login` and this will take you to the default browser and perform the authentication.
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3. Once authenticated, it will print the user details as below:
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```
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⇒ az login
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You have logged in. Now let us find all the subscriptions to which you have access...
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The following tenants don't contain accessible subscriptions. Use 'az login --allow-no-subscriptions' to have tenant level access.
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XXXXX
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[
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{
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"cloudName": "AzureCloud",
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"homeTenantId": "XXXXX",
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"id": "XXXXX",
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"isDefault": true,
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"managedByTenants": [],
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"name": "Pay-As-You-Go",
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"state": "Enabled",
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"tenantId": "XXXXX",
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"user": {
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"name": "[email protected]",
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"type": "user"
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}
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}
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]
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```
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**2\. TFVARS**
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Now create **terraform.tfvars** file with all the variable values and make sure **not to commit it**.
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**3\. Review the Terraform plan. **
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Execute the below command and ensure you are happy with the plan.
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``` bash
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$ terraform plan
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```
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This project currently does the below deployments:
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- MongoDB Atlas Azure cluster - M10
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- Azure Resource Group, VNET, Service Principal, Role-Definition, Role-Association
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- Azure-MongoDB Atlas VNET Peering
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**4\. Execute the Terraform apply.**
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Now execute the plan to provision the AWS resources.
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``` bash
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$ terraform apply
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```
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**5\. Destroy the resources.**
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Once you are finished your testing, ensure you destroy the resources to avoid unnecessary Azure and Atlas charges.
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``` bash
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$ terraform destroy
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```

‎examples/mongodbatlas-azure-vnet-peering/atlas.tf‎

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# Configure the MongoDB Atlas Provider and connect via a key
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provider "mongodbatlas" {
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public_key = var.public_key
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private_key = var.private_key
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}
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# Create the mongodb atlas Azure cluster
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resource "mongodbatlas_cluster" "azure-cluster" {
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project_id = var.project_id
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name = var.name
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num_shards = 1
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replication_factor = 3
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backup_enabled = false
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auto_scaling_disk_gb_enabled = true
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mongo_db_major_version = "4.2"
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//Provider settings block in this case it is Azure
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provider_name = "AZURE"
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provider_disk_type_name = var.provider_disk_type_name
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provider_instance_size_name = var.provider_instance_size_name
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provider_region_name = var.provider_region_name
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}
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# Create the peering connection request
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resource "mongodbatlas_network_peering" "test" {
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project_id = var.project_id
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container_id = mongodbatlas_cluster.azure-cluster.container_id
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provider_name = "AZURE"
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azure_directory_id = data.azurerm_client_config.current.tenant_id
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azure_subscription_id = data.azurerm_client_config.current.subscription_id
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resource_group_name = var.resource_group_name
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vnet_name = var.vnet_name
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atlas_cidr_block = var.atlas_cidr_block
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}

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