---
title: Getting Started with Datadog
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: Docs > Infrastructure > Datadog Resource Catalog
---

# aws_emr_instance_group{% #aws_emr_instance_group %}

## `account_id`{% #account_id %}

**Type**: `STRING`

## `auto_scaling_policy`{% #auto_scaling_policy %}

**Type**: `STRUCT`**Provider name**: `AutoScalingPolicy`**Description**: An automatic scaling policy for a core instance group or task instance group in an Amazon EMR cluster. The automatic scaling policy defines how an instance group dynamically adds and terminates Amazon EC2 instances in response to the value of a CloudWatch metric. See PutAutoScalingPolicy.

- `constraints`**Type**: `STRUCT`**Provider name**: `Constraints`**Description**: The upper and lower Amazon EC2 instance limits for an automatic scaling policy. Automatic scaling activity will not cause an instance group to grow above or below these limits.
  - `max_capacity`**Type**: `INT32`**Provider name**: `MaxCapacity`**Description**: The upper boundary of Amazon EC2 instances in an instance group beyond which scaling activities are not allowed to grow. Scale-out activities will not add instances beyond this boundary.
  - `min_capacity`**Type**: `INT32`**Provider name**: `MinCapacity`**Description**: The lower boundary of Amazon EC2 instances in an instance group below which scaling activities are not allowed to shrink. Scale-in activities will not terminate instances below this boundary.
- `rules`**Type**: `UNORDERED_LIST_STRUCT`**Provider name**: `Rules`**Description**: The scale-in and scale-out rules that comprise the automatic scaling policy.
  - `action`**Type**: `STRUCT`**Provider name**: `Action`**Description**: The conditions that trigger an automatic scaling activity.
    - `market`**Type**: `STRING`**Provider name**: `Market`**Description**: Not available for instance groups. Instance groups use the market type specified for the group.
    - `simple_scaling_policy_configuration`**Type**: `STRUCT`**Provider name**: `SimpleScalingPolicyConfiguration`**Description**: The type of adjustment the automatic scaling activity makes when triggered, and the periodicity of the adjustment.
      - `adjustment_type`**Type**: `STRING`**Provider name**: `AdjustmentType`**Description**: The way in which Amazon EC2 instances are added (if `ScalingAdjustment` is a positive number) or terminated (if `ScalingAdjustment` is a negative number) each time the scaling activity is triggered. `CHANGE_IN_CAPACITY` is the default. `CHANGE_IN_CAPACITY` indicates that the Amazon EC2 instance count increments or decrements by `ScalingAdjustment`, which should be expressed as an integer. `PERCENT_CHANGE_IN_CAPACITY` indicates the instance count increments or decrements by the percentage specified by `ScalingAdjustment`, which should be expressed as an integer. For example, 20 indicates an increase in 20% increments of cluster capacity. `EXACT_CAPACITY` indicates the scaling activity results in an instance group with the number of Amazon EC2 instances specified by `ScalingAdjustment`, which should be expressed as a positive integer.
      - `cool_down`**Type**: `INT32`**Provider name**: `CoolDown`**Description**: The amount of time, in seconds, after a scaling activity completes before any further trigger-related scaling activities can start. The default value is 0.
      - `scaling_adjustment`**Type**: `INT32`**Provider name**: `ScalingAdjustment`**Description**: The amount by which to scale in or scale out, based on the specified `AdjustmentType`. A positive value adds to the instance group's Amazon EC2 instance count while a negative number removes instances. If `AdjustmentType` is set to `EXACT_CAPACITY`, the number should only be a positive integer. If `AdjustmentType` is set to `PERCENT_CHANGE_IN_CAPACITY`, the value should express the percentage as an integer. For example, -20 indicates a decrease in 20% increments of cluster capacity.
  - `description`**Type**: `STRING`**Provider name**: `Description`**Description**: A friendly, more verbose description of the automatic scaling rule.
  - `name`**Type**: `STRING`**Provider name**: `Name`**Description**: The name used to identify an automatic scaling rule. Rule names must be unique within a scaling policy.
  - `trigger`**Type**: `STRUCT`**Provider name**: `Trigger`**Description**: The CloudWatch alarm definition that determines when automatic scaling activity is triggered.
    - `cloud_watch_alarm_definition`**Type**: `STRUCT`**Provider name**: `CloudWatchAlarmDefinition`**Description**: The definition of a CloudWatch metric alarm. When the defined alarm conditions are met along with other trigger parameters, scaling activity begins.
      - `comparison_operator`**Type**: `STRING`**Provider name**: `ComparisonOperator`**Description**: Determines how the metric specified by `MetricName` is compared to the value specified by `Threshold`.
      - `dimensions`**Type**: `UNORDERED_LIST_STRUCT`**Provider name**: `Dimensions`**Description**: A CloudWatch metric dimension.
        - `key`**Type**: `STRING`**Provider name**: `Key`**Description**: The dimension name.
        - `value`**Type**: `STRING`**Provider name**: `Value`**Description**: The dimension value.
      - `evaluation_periods`**Type**: `INT32`**Provider name**: `EvaluationPeriods`**Description**: The number of periods, in five-minute increments, during which the alarm condition must exist before the alarm triggers automatic scaling activity. The default value is `1`.
      - `metric_name`**Type**: `STRING`**Provider name**: `MetricName`**Description**: The name of the CloudWatch metric that is watched to determine an alarm condition.
      - `namespace`**Type**: `STRING`**Provider name**: `Namespace`**Description**: The namespace for the CloudWatch metric. The default is `AWS/ElasticMapReduce`.
      - `period`**Type**: `INT32`**Provider name**: `Period`**Description**: The period, in seconds, over which the statistic is applied. CloudWatch metrics for Amazon EMR are emitted every five minutes (300 seconds), so if you specify a CloudWatch metric, specify `300`.
      - `statistic`**Type**: `STRING`**Provider name**: `Statistic`**Description**: The statistic to apply to the metric associated with the alarm. The default is `AVERAGE`.
      - `threshold`**Type**: `DOUBLE`**Provider name**: `Threshold`**Description**: The value against which the specified statistic is compared.
      - `unit`**Type**: `STRING`**Provider name**: `Unit`**Description**: The unit of measure associated with the CloudWatch metric being watched. The value specified for `Unit` must correspond to the units specified in the CloudWatch metric.
- `status`**Type**: `STRUCT`**Provider name**: `Status`**Description**: The status of an automatic scaling policy.
  - `state`**Type**: `STRING`**Provider name**: `State`**Description**: Indicates the status of the automatic scaling policy.
  - `state_change_reason`**Type**: `STRUCT`**Provider name**: `StateChangeReason`**Description**: The reason for a change in status.
    - `code`**Type**: `STRING`**Provider name**: `Code`**Description**: The code indicating the reason for the change in status.`USER_REQUEST` indicates that the scaling policy status was changed by a user. `PROVISION_FAILURE` indicates that the status change was because the policy failed to provision. `CLEANUP_FAILURE` indicates an error.
    - `message`**Type**: `STRING`**Provider name**: `Message`**Description**: A friendly, more verbose message that accompanies an automatic scaling policy state change.

## `bid_price`{% #bid_price %}

**Type**: `STRING`**Provider name**: `BidPrice`**Description**: If specified, indicates that the instance group uses Spot Instances. This is the maximum price you are willing to pay for Spot Instances. Specify `OnDemandPrice` to set the amount equal to the On-Demand price, or specify an amount in USD.

## `configurations`{% #configurations %}

**Type**: `UNORDERED_LIST_STRUCT`**Provider name**: `Configurations`**Description**:Amazon EMR releases 4.x or later.The list of configurations supplied for an Amazon EMR cluster instance group. You can specify a separate configuration for each instance group (master, core, and task).

- `classification`**Type**: `STRING`**Provider name**: `Classification`**Description**: The classification within a configuration.
- `properties`**Type**: `MAP_STRING_STRING`**Provider name**: `Properties`**Description**: A set of properties specified within a configuration classification.

## `configurations_version`{% #configurations_version %}

**Type**: `INT64`**Provider name**: `ConfigurationsVersion`**Description**: The version number of the requested configuration specification for this instance group.

## `custom_ami_id`{% #custom_ami_id %}

**Type**: `STRING`**Provider name**: `CustomAmiId`**Description**: The custom AMI ID to use for the provisioned instance group.

## `ebs_block_devices`{% #ebs_block_devices %}

**Type**: `UNORDERED_LIST_STRUCT`**Provider name**: `EbsBlockDevices`**Description**: The EBS block devices that are mapped to this instance group.

- `device`**Type**: `STRING`**Provider name**: `Device`**Description**: The device name that is exposed to the instance, such as /dev/sdh.
- `volume_specification`**Type**: `STRUCT`**Provider name**: `VolumeSpecification`**Description**: EBS volume specifications such as volume type, IOPS, size (GiB) and throughput (MiB/s) that are requested for the EBS volume attached to an Amazon EC2 instance in the cluster.
  - `iops`**Type**: `INT32`**Provider name**: `Iops`**Description**: The number of I/O operations per second (IOPS) that the volume supports.
  - `size_in_gb`**Type**: `INT32`**Provider name**: `SizeInGB`**Description**: The volume size, in gibibytes (GiB). This can be a number from 1 - 1024. If the volume type is EBS-optimized, the minimum value is 10.
  - `throughput`**Type**: `INT32`**Provider name**: `Throughput`**Description**: The throughput, in mebibyte per second (MiB/s). This optional parameter can be a number from 125 - 1000 and is valid only for gp3 volumes.
  - `volume_type`**Type**: `STRING`**Provider name**: `VolumeType`**Description**: The volume type. Volume types supported are gp3, gp2, io1, st1, sc1, and standard.

## `ebs_optimized`{% #ebs_optimized %}

**Type**: `BOOLEAN`**Provider name**: `EbsOptimized`**Description**: If the instance group is EBS-optimized. An Amazon EBS-optimized instance uses an optimized configuration stack and provides additional, dedicated capacity for Amazon EBS I/O.

## `id`{% #id %}

**Type**: `STRING`**Provider name**: `Id`**Description**: The identifier of the instance group.

## `instance_group_type`{% #instance_group_type %}

**Type**: `STRING`**Provider name**: `InstanceGroupType`**Description**: The type of the instance group. Valid values are MASTER, CORE or TASK.

## `instance_type`{% #instance_type %}

**Type**: `STRING`**Provider name**: `InstanceType`**Description**: The Amazon EC2 instance type for all instances in the instance group.

## `last_successfully_applied_configurations`{% #last_successfully_applied_configurations %}

**Type**: `UNORDERED_LIST_STRUCT`**Provider name**: `LastSuccessfullyAppliedConfigurations`**Description**: A list of configurations that were successfully applied for an instance group last time.

- `classification`**Type**: `STRING`**Provider name**: `Classification`**Description**: The classification within a configuration.
- `properties`**Type**: `MAP_STRING_STRING`**Provider name**: `Properties`**Description**: A set of properties specified within a configuration classification.

## `last_successfully_applied_configurations_version`{% #last_successfully_applied_configurations_version %}

**Type**: `INT64`**Provider name**: `LastSuccessfullyAppliedConfigurationsVersion`**Description**: The version number of a configuration specification that was successfully applied for an instance group last time.

## `market`{% #market %}

**Type**: `STRING`**Provider name**: `Market`**Description**: The marketplace to provision instances for this group. Valid values are ON_DEMAND or SPOT.

## `name`{% #name %}

**Type**: `STRING`**Provider name**: `Name`**Description**: The name of the instance group.

## `requested_instance_count`{% #requested_instance_count %}

**Type**: `INT32`**Provider name**: `RequestedInstanceCount`**Description**: The target number of instances for the instance group.

## `running_instance_count`{% #running_instance_count %}

**Type**: `INT32`**Provider name**: `RunningInstanceCount`**Description**: The number of instances currently running in this instance group.

## `shrink_policy`{% #shrink_policy %}

**Type**: `STRUCT`**Provider name**: `ShrinkPolicy`**Description**: Policy for customizing shrink operations.

- `decommission_timeout`**Type**: `INT32`**Provider name**: `DecommissionTimeout`**Description**: The desired timeout for decommissioning an instance. Overrides the default YARN decommissioning timeout.
- `instance_resize_policy`**Type**: `STRUCT`**Provider name**: `InstanceResizePolicy`**Description**: Custom policy for requesting termination protection or termination of specific instances when shrinking an instance group.
  - `instance_termination_timeout`**Type**: `INT32`**Provider name**: `InstanceTerminationTimeout`**Description**: Decommissioning timeout override for the specific list of instances to be terminated.
  - `instances_to_protect`**Type**: `UNORDERED_LIST_STRING`**Provider name**: `InstancesToProtect`**Description**: Specific list of instances to be protected when shrinking an instance group.
  - `instances_to_terminate`**Type**: `UNORDERED_LIST_STRING`**Provider name**: `InstancesToTerminate`**Description**: Specific list of instances to be terminated when shrinking an instance group.

## `status`{% #status %}

**Type**: `STRUCT`**Provider name**: `Status`**Description**: The current status of the instance group.

- `state`**Type**: `STRING`**Provider name**: `State`**Description**: The current state of the instance group.
- `state_change_reason`**Type**: `STRUCT`**Provider name**: `StateChangeReason`**Description**: The status change reason details for the instance group.
  - `code`**Type**: `STRING`**Provider name**: `Code`**Description**: The programmable code for the state change reason.
  - `message`**Type**: `STRING`**Provider name**: `Message`**Description**: The status change reason description.
- `timeline`**Type**: `STRUCT`**Provider name**: `Timeline`**Description**: The timeline of the instance group status over time.
  - `creation_date_time`**Type**: `TIMESTAMP`**Provider name**: `CreationDateTime`**Description**: The creation date and time of the instance group.
  - `end_date_time`**Type**: `TIMESTAMP`**Provider name**: `EndDateTime`**Description**: The date and time when the instance group terminated.
  - `ready_date_time`**Type**: `TIMESTAMP`**Provider name**: `ReadyDateTime`**Description**: The date and time when the instance group became ready to perform tasks.

## `tags`{% #tags %}

**Type**: `UNORDERED_LIST_STRING`