AWS MWAA Terraform Module

Terraform module which creates AWS MWAA resources and connects them together.

How to

Use this code to create a basic MWAA environment (using all default parameters, see Inputs):

module "airflow" {
  source = "idealo/mwaa/aws"
  version = "x.x.x"
  
  account_id = "12345679"
  environment_name = "MyEnvironment"
  internet_gateway_id = "ig-12345"
  private_subnet_cidrs = ["10.0.1.0/24","10.0.2.0/24"] # depending on your vpc ip range
  public_subnet_cidrs = ["10.0.3.0/24","10.0.4.0/24"] # depending on your vpc ip range
  region = "us-west-1"
  source_bucket_arn = "arn:aws:s3:::MyMwaaBucket"
  vpc_id = "vpc-12345"
}

Add permissions to the Airflow execution role

To give additional permissions to your airflow executions role (e.g. elasticmapreduce:CreateJobFlow to start an EMR cluster), create a Policy document containing the permissions you need:

data aws_iam_policy_document "additional_execution_policy_doc" {
  statement {
    effect = "Allow"
    actions = [
      "<Your permissions>"
    ]
    resources = [
      "<YourResource>"]
  }
}

and pass the document json to the module:

module "airflow" {
  ...
  additional_execution_role_policy_document_json = data.aws_iam_policy_document.additional_execution_policy_doc.json
  ...
}

Add custom plugins

Simply upload the plugins.zip to s3 and pass the relative path inside the MWAA bucket to the plugins_s3_path parameter. If you zip and upload it via terraform, this would look like this:

module "airflow" {
  ...
  plugins_s3_path = aws_s3_bucket_object.your_plugin.key
  ...
}

Use your own networking config

If you set create_networking_config = false no subnets, eip, NAT gateway and route tables will be created. Be aware that you still need the networking resources to get your environment running, follow the official documentation to create them properly.

S3 Bucket configuration

MWAA needs a S3 bucket to store the DAG files. Here is a minimal configuration for this S3 bucket:

resource "aws_s3_bucket" "mwaa" {
  bucket = "…"
}

resource "aws_s3_bucket_versioning" "mwaa" {
  bucket = aws_s3_bucket.mwaa.bucket
  versioning_configuration {
    status = "Enabled"
  }
}

resource "aws_s3_bucket_public_access_block" "mwaa" {
  # required: https://docs.aws.amazon.com/mwaa/latest/userguide/mwaa-s3-bucket.html
  bucket                  = aws_s3_bucket.mwaa.id
  block_public_acls       = true
  block_public_policy     = true
  ignore_public_acls      = true
  restrict_public_buckets = true
}

Requirements

Name	Version
terraform	>=1.0.0
aws	~> 4.0

Providers

Name	Version
aws	4.40.0

Modules

No modules.

Resources

Name	Type
aws_eip.this	resource
aws_iam_role.this	resource
aws_iam_role_policy.this	resource
aws_internet_gateway.this	resource
aws_mwaa_environment.this	resource
aws_nat_gateway.this	resource
aws_route_table.private	resource
aws_route_table.public	resource
aws_route_table_association.private	resource
aws_route_table_association.public	resource
aws_security_group.this	resource
aws_subnet.private	resource
aws_subnet.public	resource
aws_iam_policy_document.assume	data source
aws_iam_policy_document.base	data source
aws_iam_policy_document.this	data source

Inputs

Name	Description	Type	Default	Required
account_id	Account ID of the account in which MWAA will be started	string	n/a	yes
additional_associated_security_group_ids	Security group IDs of existing security groups that should be associated with the MWAA environment.	list(string)	[]	no
additional_execution_role_policy_document_json	Additional permissions to attach to the base mwaa execution role	string	"{}"	no
airflow_configuration_options	additional configuration to overwrite airflows standard config	map(string)	{}	no
airflow_version	Airflow version to be used	string	"2.0.2"	no
create_networking_config	true if networking resources (subnets, eip, NAT gateway and route table) should be created.	bool	true	no
dag_processing_logs_enabled	n/a	bool	true	no
dag_processing_logs_level	One of: DEBUG, INFO, WARNING, ERROR, CRITICAL	string	"WARNING"	no
dag_s3_path	Relative path of the dags folder within the source bucket	string	"dags/"	no
environment_class	n/a	string	"mw1.small"	no
environment_name	Name of the MWAA environment	string	n/a	yes
internet_gateway_id	ID of the internet gateway to the VPC, if not set and create_networking_config = true an internet gateway will be created	string	null	no
kms_key_arn	KMS CMK ARN to use by MWAA for data encryption. MUST reference the same KMS key as used by S3 bucket specified by source_bucket_arn, if the bucket uses KMS. If not specified, the default AWS owned key for MWAA will be used for backward compatibility with version 1.0.1 of this module.	string	null	no
max_workers	numeric string, min 1	string	"10"	no
min_workers	numeric string, min 1	string	"1"	no
plugins_s3_object_version	n/a	string	null	no
plugins_s3_path	relative path of the plugins.zip within the source bucket	string	null	no
private_subnet_cidrs	CIDR blocks for the private subnets MWAA uses. Must be at least 2 if create_networking_config=true	list(string)	[]	no
private_subnet_ids	Subnet Ids of the existing private subnets that should be used if create_networking_config=false	list(string)	[]	no
public_subnet_cidrs	CIDR blocks for the public subnets MWAA uses. Must be at least 2 if create_networking_config=true	list(string)	[]	no
region	AWS Region where the environment and its resources will be created	string	n/a	yes
requirements_s3_object_version	n/a	string	null	no
requirements_s3_path	relative path of the requirements.txt (incl. filename) within the source bucket	string	null	no
scheduler_logs_enabled	n/a	bool	true	no
scheduler_logs_level	One of: DEBUG, INFO, WARNING, ERROR, CRITICAL	string	"WARNING"	no
source_bucket_arn	ARN of the bucket in which DAGs, Plugin and Requirements are put	string	n/a	yes
tags	tags and logging	map(string)	{}	no
task_logs_enabled	n/a	bool	true	no
task_logs_level	One of: DEBUG, INFO, WARNING, ERROR, CRITICAL	string	"INFO"	no
vpc_id	VPC id of the VPC in which the environments resources are created	string	n/a	yes
webserver_access_mode	Default: PRIVATE_ONLY	string	null	no
webserver_logs_enabled	n/a	bool	true	no
webserver_logs_level	One of: DEBUG, INFO, WARNING, ERROR, CRITICAL	string	"WARNING"	no
weekly_maintenance_window_start	The day and time of the week in Coordinated Universal Time (UTC) 24-hour standard time to start weekly maintenance updates of your environment in the following format: DAY:HH:MM. For example: TUE:03:30. You can specify a start time in 30 minute increments only	string	"MON:01:00"	no
worker_logs_enabled	n/a	bool	true	no
worker_logs_level	One of: DEBUG, INFO, WARNING, ERROR, CRITICAL	string	"WARNING"	no

Outputs

Name	Description
mwaa_arn	The arn of the created MWAA environment.
mwaa_nat_gateway_public_ips	List of the ips of the nat gateways created by this module.
mwaa_webserver_url	The webserver URL of the MWAA Environment.