terraform-aws-documentdb-mongodb

Install MongoDB on AWS

Terraform Link:
https://registry.terraform.io/modules/aws-terraform-module/documentdb-mongodb/aws/latest

Provide VPC ID and subnet IDs via data sources: "aws_vpc and aws_subnets".

Get the existing VPC's information via Data Sources

data "aws_vpc" "selected" {
  tags = {
    Name = "dev-nim-engine" # Replace with your VPC's tag name
  }
}

data "aws_subnets" "private_networks" {
  filter {
    name   = "vpc-id"
    values = [data.aws_vpc.selected.id]
  }

  filter {
    name   = "tag:kubernetes.io/role/internal-elb"
    values = ["1"]
  }
}


module "documentdb-mongodb" {
  source  = "aws-terraform-module/documentdb-mongodb/aws"
  version = "1.1.0"
  vpc_id = data.aws_vpc.selected.id
  subnet_ids = data.aws_subnets.private_networks.ids
  cluster_name = "mongodb"
  engine_version = "5.0.0"
  cluster_family = "docdb5.0"
  allow_major_version_upgrade = true
  retention_period = 35
  instance_type = "db.t3.medium"
  cluster_size = 1
  allowed_cidr_blocks = [data.aws_vpc.selected.cidr_block,"10.195.8.0/21"]
}

Get the VPC's information via Remote State.

data "terraform_remote_state" "network" {
  backend = "s3"
  config = {
    bucket = "backend-nim-integration-terraform"
    key    = "infra-structure/prod-nim-engines-uswest2/vpc/terraform.tfstate"
    region = "us-west-2"
  }
}

module "documentdb-mongodb" {
  source  = "aws-terraform-module/documentdb-mongodb/aws"
  version = "1.1.0"
  vpc_id = data.terraform_remote_state.network.outputs.vpc_id
  subnet_ids = data.terraform_remote_state.network.outputs.private_subnets
  cluster_name = "mongodb"
  engine_version = "5.0.0"
  cluster_family = "docdb5.0"
  allow_major_version_upgrade = true
  retention_period = 35
  instance_type = "db.t3.medium"
  cluster_size = 1
  allowed_cidr_blocks = [data.terraform_remote_state.network.outputs.vpc_cidr_block]
}

Restore DocumentDB from a snapshot.

Obtain the specific Snapshot ARN from the old DocumentDB and enter it as the snapshot_identifier.

You must know the Document's username to declare it in the Terraform module.

....

module "documentdb-mongodb-restored" {
  source  = "aws-terraform-module/documentdb-mongodb/aws"
  version = "1.1.0"
  vpc_id = data.aws_vpc.selected.id
  subnet_ids = data.aws_subnets.private_networks.ids
  cluster_name = "mongodb-restored"
  engine_version = "5.0.0"
  cluster_family = "docdb5.0"
  allow_major_version_upgrade = true
  retention_period = 35
  instance_type = "db.t3.medium"
  cluster_size = 1
  allowed_cidr_blocks = [data.aws_vpc.selected.cidr_block]
  snapshot_identifier = "arn:aws:rds:us-west-2:043701111869:cluster-snapshot:rds:mongodb-2024-10-12-03-13"
  master_username = "tarpon"
}

When creating a new DocumentDB from the completed snapshot, you must use a username and password to log in.