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Terraform module to provision an Elastic MapReduce (EMR) cluster on AWS

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Cloud Posse

Terraform module to provision an Elastic MapReduce (EMR) cluster on AWS.


This project is part of our comprehensive "SweetOps" approach towards DevOps.

Terraform Open Source Modules

It's 100% Open Source and licensed under the APACHE2.

We literally have hundreds of terraform modules that are Open Source and well-maintained. Check them out!

Security & Compliance

Security scanning is graciously provided by Bridgecrew. Bridgecrew is the leading fully hosted, cloud-native solution providing continuous Terraform security and compliance.

Benchmark Description
Infrastructure Security Infrastructure Security Compliance
CIS KUBERNETES Center for Internet Security, KUBERNETES Compliance
CIS AWS Center for Internet Security, AWS Compliance
CIS AZURE Center for Internet Security, AZURE Compliance
PCI-DSS Payment Card Industry Data Security Standards Compliance
NIST-800-53 National Institute of Standards and Technology Compliance
ISO27001 Information Security Management System, ISO/IEC 27001 Compliance
SOC2 Service Organization Control 2 Compliance
CIS GCP Center for Internet Security, GCP Compliance
HIPAA Health Insurance Portability and Accountability Compliance

Usage

IMPORTANT: We do not pin modules to versions in our examples because of the difficulty of keeping the versions in the documentation in sync with the latest released versions. We highly recommend that in your code you pin the version to the exact version you are using so that your infrastructure remains stable, and update versions in a systematic way so that they do not catch you by surprise.

Also, because of a bug in the Terraform registry (hashicorp/terraform#21417), the registry shows many of our inputs as required when in fact they are optional. The table below correctly indicates which inputs are required.

For a complete example, see examples/complete

For automated tests of the complete example using bats and Terratest (which tests and deploys the example on AWS), see test.

provider "aws" {
  region = "us-east-2"
}

module "vpc" {
  source = "cloudposse/vpc/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"
  namespace  = var.namespace
  stage      = var.stage
  name       = var.name
  cidr_block = "172.16.0.0/16"
}

module "subnets" {
  source = "cloudposse/dynamic-subnets/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"
  availability_zones   = var.availability_zones
  namespace            = var.namespace
  stage                = var.stage
  name                 = var.name
  vpc_id               = module.vpc.vpc_id
  igw_id               = module.vpc.igw_id
  cidr_block           = module.vpc.vpc_cidr_block
  nat_gateway_enabled  = false
  nat_instance_enabled = false
}

module "s3_log_storage" {
  source = "cloudposse/s3-log-storage/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"
  region        = var.region
  namespace     = var.namespace
  stage         = var.stage
  name          = var.name
  attributes    = ["logs"]
  force_destroy = true
}

module "aws_key_pair" {
  source = "cloudposse/key-pair/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"
  namespace           = var.namespace
  stage               = var.stage
  name                = var.name
  attributes          = ["ssh", "key"]
  ssh_public_key_path = var.ssh_public_key_path
  generate_ssh_key    = var.generate_ssh_key
}

module "emr_cluster" {
  source = "cloudposse/emr-cluster/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"
  namespace                                      = var.namespace
  stage                                          = var.stage
  name                                           = var.name
  master_allowed_security_groups                 = [module.vpc.vpc_default_security_group_id]
  slave_allowed_security_groups                  = [module.vpc.vpc_default_security_group_id]
  region                                         = var.region
  vpc_id                                         = module.vpc.vpc_id
  subnet_id                                      = module.subnets.private_subnet_ids[0]
  route_table_id                                 = module.subnets.private_route_table_ids[0]
  subnet_type                                    = "private"
  ebs_root_volume_size                           = var.ebs_root_volume_size
  visible_to_all_users                           = var.visible_to_all_users
  release_label                                  = var.release_label
  applications                                   = var.applications
  configurations_json                            = var.configurations_json
  core_instance_group_instance_type              = var.core_instance_group_instance_type
  core_instance_group_instance_count             = var.core_instance_group_instance_count
  core_instance_group_ebs_size                   = var.core_instance_group_ebs_size
  core_instance_group_ebs_type                   = var.core_instance_group_ebs_type
  core_instance_group_ebs_volumes_per_instance   = var.core_instance_group_ebs_volumes_per_instance
  master_instance_group_instance_type            = var.master_instance_group_instance_type
  master_instance_group_instance_count           = var.master_instance_group_instance_count
  master_instance_group_ebs_size                 = var.master_instance_group_ebs_size
  master_instance_group_ebs_type                 = var.master_instance_group_ebs_type
  master_instance_group_ebs_volumes_per_instance = var.master_instance_group_ebs_volumes_per_instance
  create_task_instance_group                     = var.create_task_instance_group
  log_uri                                        = format("s3n://%s/", module.s3_log_storage.bucket_id)
  key_name                                       = module.aws_key_pair.key_name
}

Makefile Targets

Available targets:

  help                                Help screen
  help/all                            Display help for all targets
  help/short                          This help short screen
  lint                                Lint terraform code

Requirements

Name Version
terraform >= 0.13.0
aws >= 3.5.0

Providers

Name Version
aws >= 3.5.0

Modules

Name Source Version
dns_master cloudposse/route53-cluster-hostname/aws 0.12.2
label_core cloudposse/label/null 0.25.0
label_ec2 cloudposse/label/null 0.25.0
label_ec2_autoscaling cloudposse/label/null 0.25.0
label_emr cloudposse/label/null 0.25.0
label_master cloudposse/label/null 0.25.0
label_master_managed cloudposse/label/null 0.25.0
label_service_managed cloudposse/label/null 0.25.0
label_slave cloudposse/label/null 0.25.0
label_slave_managed cloudposse/label/null 0.25.0
label_task cloudposse/label/null 0.25.0
this cloudposse/label/null 0.25.0

Resources

Name Type
aws_emr_cluster.default resource
aws_emr_instance_group.task resource
aws_iam_instance_profile.ec2 resource
aws_iam_role.ec2 resource
aws_iam_role.ec2_autoscaling resource
aws_iam_role.emr resource
aws_iam_role_policy_attachment.ec2 resource
aws_iam_role_policy_attachment.ec2_autoscaling resource
aws_iam_role_policy_attachment.emr resource
aws_security_group.managed_master resource
aws_security_group.managed_service_access resource
aws_security_group.managed_slave resource
aws_security_group.master resource
aws_security_group.slave resource
aws_security_group_rule.managed_master_egress resource
aws_security_group_rule.managed_master_service_access_ingress resource
aws_security_group_rule.managed_service_access_egress resource
aws_security_group_rule.managed_slave_egress resource
aws_security_group_rule.master_egress resource
aws_security_group_rule.master_ingress_cidr_blocks resource
aws_security_group_rule.master_ingress_security_groups resource
aws_security_group_rule.slave_egress resource
aws_security_group_rule.slave_ingress_cidr_blocks resource
aws_security_group_rule.slave_ingress_security_groups resource
aws_vpc_endpoint.vpc_endpoint_s3 resource
aws_iam_policy_document.assume_role_ec2 data source
aws_iam_policy_document.assume_role_emr data source
aws_partition.current data source

Inputs

Name Description Type Default Required
additional_info A JSON string for selecting additional features such as adding proxy information. Note: Currently there is no API to retrieve the value of this argument after EMR cluster creation from provider, therefore Terraform cannot detect drift from the actual EMR cluster if its value is changed outside Terraform string null no
additional_master_security_group The name of the existing additional security group that will be used for EMR master node. If empty, a new security group will be created string "" no
additional_slave_security_group The name of the existing additional security group that will be used for EMR core & task nodes. If empty, a new security group will be created string "" no
additional_tag_map Additional key-value pairs to add to each map in tags_as_list_of_maps. Not added to tags or id.
This is for some rare cases where resources want additional configuration of tags
and therefore take a list of maps with tag key, value, and additional configuration.
map(string) {} no
applications A list of applications for the cluster. Valid values are: Flink, Ganglia, Hadoop, HBase, HCatalog, Hive, Hue, JupyterHub, Livy, Mahout, MXNet, Oozie, Phoenix, Pig, Presto, Spark, Sqoop, TensorFlow, Tez, Zeppelin, and ZooKeeper (as of EMR 5.25.0). Case insensitive list(string) n/a yes
attributes ID element. Additional attributes (e.g. workers or cluster) to add to id,
in the order they appear in the list. New attributes are appended to the
end of the list. The elements of the list are joined by the delimiter
and treated as a single ID element.
list(string) [] no
bootstrap_action List of bootstrap actions that will be run before Hadoop is started on the cluster nodes
list(object({
path = string
name = string
args = list(string)
}))
[] no
configurations_json A JSON string for supplying list of configurations for the EMR cluster. See https://docs.aws.amazon.com/emr/latest/ReleaseGuide/emr-configure-apps.html for more details string "" no
context Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as null to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
any
{
"additional_tag_map": {},
"attributes": [],
"delimiter": null,
"descriptor_formats": {},
"enabled": true,
"environment": null,
"id_length_limit": null,
"label_key_case": null,
"label_order": [],
"label_value_case": null,
"labels_as_tags": [
"unset"
],
"name": null,
"namespace": null,
"regex_replace_chars": null,
"stage": null,
"tags": {},
"tenant": null
}
no
core_instance_group_autoscaling_policy String containing the EMR Auto Scaling Policy JSON for the Core instance group string null no
core_instance_group_bid_price Bid price for each EC2 instance in the Core instance group, expressed in USD. By setting this attribute, the instance group is being declared as a Spot Instance, and will implicitly create a Spot request. Leave this blank to use On-Demand Instances string null no
core_instance_group_ebs_iops The number of I/O operations per second (IOPS) that the Core volume supports number null no
core_instance_group_ebs_size Core instances volume size, in gibibytes (GiB) number n/a yes
core_instance_group_ebs_type Core instances volume type. Valid options are gp2, io1, standard and st1 string "gp2" no
core_instance_group_ebs_volumes_per_instance The number of EBS volumes with this configuration to attach to each EC2 instance in the Core instance group number 1 no
core_instance_group_instance_count Target number of instances for the Core instance group. Must be at least 1 number 1 no
core_instance_group_instance_type EC2 instance type for all instances in the Core instance group string n/a yes
create_task_instance_group Whether to create an instance group for Task nodes. For more info: https://www.terraform.io/docs/providers/aws/r/emr_instance_group.html, https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-master-core-task-nodes.html bool false no
create_vpc_endpoint_s3 Set to false to prevent the module from creating VPC S3 Endpoint bool true no
custom_ami_id A custom Amazon Linux AMI for the cluster (instead of an EMR-owned AMI). Available in Amazon EMR version 5.7.0 and later string null no
delimiter Delimiter to be used between ID elements.
Defaults to - (hyphen). Set to "" to use no delimiter at all.
string null no
descriptor_formats Describe additional descriptors to be output in the descriptors output map.
Map of maps. Keys are names of descriptors. Values are maps of the form
{<br> format = string<br> labels = list(string)<br>}
(Type is any so the map values can later be enhanced to provide additional options.)
format is a Terraform format string to be passed to the format() function.
labels is a list of labels, in order, to pass to format() function.
Label values will be normalized before being passed to format() so they will be
identical to how they appear in id.
Default is {} (descriptors output will be empty).
any {} no
ebs_root_volume_size Size in GiB of the EBS root device volume of the Linux AMI that is used for each EC2 instance. Available in Amazon EMR version 4.x and later number 10 no
ec2_autoscaling_role_enabled If set to false, will use existing_ec2_autoscaling_role_arn for an existing EC2 autoscaling IAM role that was created outside of this module bool true no
ec2_autoscaling_role_permissions_boundary The Permissions Boundary ARN to apply to the EC2 Autoscaling Role. string "" no
ec2_role_enabled If set to false, will use existing_ec2_instance_profile_arn for an existing EC2 IAM role that was created outside of this module bool true no
ec2_role_permissions_boundary The Permissions Boundary ARN to apply to the EC2 Role. string "" no
emr_role_permissions_boundary The Permissions Boundary ARN to apply to the EMR Role. string "" no
enabled Set to false to prevent the module from creating any resources bool null no
environment ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' string null no
existing_ec2_autoscaling_role_arn ARN of an existing EC2 autoscaling role to attach to the cluster string "" no
existing_ec2_instance_profile_arn ARN of an existing EC2 instance profile string "" no
existing_service_role_arn ARN of an existing EMR service role to attach to the cluster string "" no
id_length_limit Limit id to this many characters (minimum 6).
Set to 0 for unlimited length.
Set to null for keep the existing setting, which defaults to 0.
Does not affect id_full.
number null no
keep_job_flow_alive_when_no_steps Switch on/off run cluster with no steps or when all steps are complete bool true no
kerberos_ad_domain_join_password The Active Directory password for ad_domain_join_user. Terraform cannot perform drift detection of this configuration. string null no
kerberos_ad_domain_join_user Required only when establishing a cross-realm trust with an Active Directory domain. A user with sufficient privileges to join resources to the domain. Terraform cannot perform drift detection of this configuration. string null no
kerberos_cross_realm_trust_principal_password Required only when establishing a cross-realm trust with a KDC in a different realm. The cross-realm principal password, which must be identical across realms. Terraform cannot perform drift detection of this configuration. string null no
kerberos_enabled Set to true if EMR cluster will use kerberos_attributes bool false no
kerberos_kdc_admin_password The password used within the cluster for the kadmin service on the cluster-dedicated KDC, which maintains Kerberos principals, password policies, and keytabs for the cluster. Terraform cannot perform drift detection of this configuration. string null no
kerberos_realm The name of the Kerberos realm to which all nodes in a cluster belong. For example, EC2.INTERNAL string "EC2.INTERNAL" no
key_name Amazon EC2 key pair that can be used to ssh to the master node as the user called hadoop string null no
label_key_case Controls the letter case of the tags keys (label names) for tags generated by this module.
Does not affect keys of tags passed in via the tags input.
Possible values: lower, title, upper.
Default value: title.
string null no
label_order The order in which the labels (ID elements) appear in the id.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.
list(string) null no
label_value_case Controls the letter case of ID elements (labels) as included in id,
set as tag values, and output by this module individually.
Does not affect values of tags passed in via the tags input.
Possible values: lower, title, upper and none (no transformation).
Set this to title and set delimiter to "" to yield Pascal Case IDs.
Default value: lower.
string null no
labels_as_tags Set of labels (ID elements) to include as tags in the tags output.
Default is to include all labels.
Tags with empty values will not be included in the tags output.
Set to [] to suppress all generated tags.
Notes:
The value of the name tag, if included, will be the id, not the name.
Unlike other null-label inputs, the initial setting of labels_as_tags cannot be
changed in later chained modules. Attempts to change it will be silently ignored.
set(string)
[
"default"
]
no
log_uri The path to the Amazon S3 location where logs for this cluster are stored string null no
managed_master_security_group The name of the existing managed security group that will be used for EMR master node. If empty, a new security group will be created string "" no
managed_slave_security_group The name of the existing managed security group that will be used for EMR core & task nodes. If empty, a new security group will be created string "" no
master_allowed_cidr_blocks List of CIDR blocks to be allowed to access the master instances list(string) [] no
master_allowed_security_groups List of security groups to be allowed to connect to the master instances list(string) [] no
master_dns_name Name of the cluster CNAME record to create in the parent DNS zone specified by zone_id. If left empty, the name will be auto-asigned using the format emr-master-var.name string null no
master_instance_group_bid_price Bid price for each EC2 instance in the Master instance group, expressed in USD. By setting this attribute, the instance group is being declared as a Spot Instance, and will implicitly create a Spot request. Leave this blank to use On-Demand Instances string null no
master_instance_group_ebs_iops The number of I/O operations per second (IOPS) that the Master volume supports number null no
master_instance_group_ebs_size Master instances volume size, in gibibytes (GiB) number n/a yes
master_instance_group_ebs_type Master instances volume type. Valid options are gp2, io1, standard and st1 string "gp2" no
master_instance_group_ebs_volumes_per_instance The number of EBS volumes with this configuration to attach to each EC2 instance in the Master instance group number 1 no
master_instance_group_instance_count Target number of instances for the Master instance group. Must be at least 1 number 1 no
master_instance_group_instance_type EC2 instance type for all instances in the Master instance group string n/a yes
name ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.
This is the only ID element not also included as a tag.
The "name" tag is set to the full id string. There is no tag with the value of the name input.
string null no
namespace ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique string null no
regex_replace_chars Terraform regular expression (regex) string.
Characters matching the regex will be removed from the ID elements.
If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.
string null no
region AWS region string n/a yes
release_label The release label for the Amazon EMR release. https://docs.aws.amazon.com/emr/latest/ReleaseGuide/emr-release-5x.html string "emr-5.25.0" no
route_table_id Route table ID for the VPC S3 Endpoint when launching the EMR cluster in a private subnet. Required when subnet_type is private string "" no
scale_down_behavior The way that individual Amazon EC2 instances terminate when an automatic scale-in activity occurs or an instance group is resized string null no
security_configuration The security configuration name to attach to the EMR cluster. Only valid for EMR clusters with release_label 4.8.0 or greater. See https://www.terraform.io/docs/providers/aws/r/emr_security_configuration.html for more info string null no
service_access_security_group The name of the existing additional security group that will be used for EMR core & task nodes. If empty, a new security group will be created string "" no
service_role_enabled If set to false, will use existing_service_role_arn for an existing IAM role that was created outside of this module bool true no
slave_allowed_cidr_blocks List of CIDR blocks to be allowed to access the slave instances list(string) [] no
slave_allowed_security_groups List of security groups to be allowed to connect to the slave instances list(string) [] no
stage ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' string null no
step_concurrency_level The number of steps that can be executed concurrently. You can specify a maximum of 256 steps. Only valid for EMR clusters with release_label 5.28.0 or greater. number null no
steps List of steps to run when creating the cluster.
list(object({
name = string
action_on_failure = string
hadoop_jar_step = object({
args = list(string)
jar = string
main_class = string
properties = map(string)
})
}))
[] no
subnet_id VPC subnet ID where you want the job flow to launch. Cannot specify the cc1.4xlarge instance type for nodes of a job flow launched in a Amazon VPC string n/a yes
subnet_type Type of VPC subnet ID where you want the job flow to launch. Supported values are private or public string "private" no
tags Additional tags (e.g. {'BusinessUnit': 'XYZ'}).
Neither the tag keys nor the tag values will be modified by this module.
map(string) {} no
task_instance_group_autoscaling_policy String containing the EMR Auto Scaling Policy JSON for the Task instance group string null no
task_instance_group_bid_price Bid price for each EC2 instance in the Task instance group, expressed in USD. By setting this attribute, the instance group is being declared as a Spot Instance, and will implicitly create a Spot request. Leave this blank to use On-Demand Instances string null no
task_instance_group_ebs_iops The number of I/O operations per second (IOPS) that the Task volume supports number null no
task_instance_group_ebs_optimized Indicates whether an Amazon EBS volume in the Task instance group is EBS-optimized. Changing this forces a new resource to be created bool false no
task_instance_group_ebs_size Task instances volume size, in gibibytes (GiB) number 10 no
task_instance_group_ebs_type Task instances volume type. Valid options are gp2, io1, standard and st1 string "gp2" no
task_instance_group_ebs_volumes_per_instance The number of EBS volumes with this configuration to attach to each EC2 instance in the Task instance group number 1 no
task_instance_group_instance_count Target number of instances for the Task instance group. Must be at least 1 number 1 no
task_instance_group_instance_type EC2 instance type for all instances in the Task instance group string null no
tenant ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for string null no
termination_protection Switch on/off termination protection (default is false, except when using multiple master nodes). Before attempting to destroy the resource when termination protection is enabled, this configuration must be applied with its value set to false bool false no
use_existing_additional_master_security_group If set to true, will use variable additional_master_security_group using an existing security group that was created outside of this module bool false no
use_existing_additional_slave_security_group If set to true, will use variable additional_slave_security_group using an existing security group that was created outside of this module bool false no
use_existing_managed_master_security_group If set to true, will use variable managed_master_security_group using an existing security group that was created outside of this module bool false no
use_existing_managed_slave_security_group If set to true, will use variable managed_slave_security_group using an existing security group that was created outside of this module bool false no
use_existing_service_access_security_group If set to true, will use variable service_access_security_group using an existing security group that was created outside of this module bool false no
visible_to_all_users Whether the job flow is visible to all IAM users of the AWS account associated with the job flow bool true no
vpc_id VPC ID to create the cluster in (e.g. vpc-a22222ee) string n/a yes
zone_id Route53 parent zone ID. If provided (not empty), the module will create sub-domain DNS records for the masters and slaves string null no

Outputs

Name Description
cluster_id EMR cluster ID
cluster_name EMR cluster name
ec2_role Role name of EMR EC2 instances so users can attach more policies
master_host Name of the cluster CNAME record for the master nodes in the parent DNS zone
master_public_dns Master public DNS
master_security_group_id Master security group ID
slave_security_group_id Slave security group ID

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Licensed to the Apache Software Foundation (ASF) under one
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to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  https://www.apache.org/licenses/LICENSE-2.0

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KIND, either express or implied.  See the License for the
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Contributors

Erik Osterman
Erik Osterman
Andriy Knysh
Andriy Knysh
Igor Rodionov
Igor Rodionov

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Terraform module to provision an Elastic MapReduce (EMR) cluster on AWS

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