Amazon EMR Cluster pattern-based discovery

Discovery and Service Mapping Patterns finds Amazon EMR Clusters on your cloud environment running on EC2. Discovering some of these resources may require updating to the latest version of the Discovery and Service Mapping Patterns application from the ServiceNow Store.

Pattern-based discovery and mapping requirements

Verify the AWS discovery prerequisites

For more information, see the prerequisites section in Amazon AWS Cloud components discovery using patterns.

Remove resources from the Resource Inclusion List table

Verify that the relevant resource isn't listed in the Resource Inclusion List [sa_cloud_inventory_resource_whitelist] table to avoid duplicate discovery. For more information on removing resources from the Resource Inclusion List, see Amazon Web Services (AWS) Resource Inventory.

Enable the relevant pattern

The pattern for this service is disabled by default. Starting with Visibility Content version 6.28.0, activating or deactivating a pattern won't be considered a customization, and it will continue to receive updates. Patterns that were previously activated or deactivated will reset to the latest predefined version after upgrading while retaining the last active field value. For more information on enabling patterns, see Activate a disabled pattern.

Discovery and Service Mapping Patterns application populates data in both CMDB and non-CMDB tables.

Data stored in non-CMDB tables

Discovery and Service Mapping Patterns application populates data in the non-CMDB table when running the Amazon AWS - EMR Cluster - Extended Inventory (LP) pattern.

You can review the non-CMDB AWS tables by navigating to All > Configuration > AWS. You can also search the navigation filter for the specific pattern name.

Table 1. AWS EMR Cluster [cmdb_aws_emr_cluster]

Field	Description
Name [name]	Name of the EMR cluster.
Object ID [object_id]	The Amazon Resource Name (ARN) of the EMR cluster.
Cluster ID [cluster_id]	The unique identifier of the EMR cluster.
State [state]	Current state of the EMR cluster. For example: RUNNING, WAITING, or TERMINATING.
Configuration Item [configuration_item]	References the Cloud Resource [cmdb_ci_cmp_resource] table.

Data stored in CMDB tables

Discovery and Service Mapping Patterns application populates data in the CMDB when running the Amazon AWS - EMR Cluster - Extended Inventory (LP) pattern.

Table 2. Cloud Resource [cmdb_ci_cmp_resource]

Field	Description
Name [name]	Name of the EMR cluster.
Object ID [object_id]	The ARN of the EMR cluster.
Resource type [resource_type]	Type of resource. The value is set to AWS::EMR::Cluster.
Install Status [install_status]	Install status of the resource. Default value is Installed.
Operational status [operational_status]	Operational status of the resource. Default value is Operational.

CI relationships

The Amazon AWS - EMR Cluster - Extended Inventory (LP) pattern creates the following relationships and references to support Amazon EMR Cluster discovery. References link to records in other tables and don't appear in the CI Relationship [cmdb_rel_ci] table.

Table 3. CI relationships

CI	Relationship	CI
Cloud Resource [cmdb_ci_cmp_resource]	Hosted on::Hosts	AWS Datacenter [cmdb_ci_aws_datacenter]

Table 4. CI references

CI	Field	Referenced CI
AWS EMR Cluster [cmdb_aws_emr_cluster]	Configuration Item [configuration_item]	Cloud Resource [cmdb_ci_cmp_resource]
Key Value [cmdb_key_value]	Configuration item [configuration_item]	Cloud Resource [cmdb_ci_cmp_resource]

AWS Tag discovery

The Amazon AWS - EMR Cluster - Extended Inventory (LP) pattern collects tags and populates them in the Key Value [cmdb_key_value] table.

Table 5. Key Value [cmdb_key_value]

Field	Description
Key [key]	Tag name.
Value [value]	Tag value.
Configuration item [configuration_item]	References the Cloud Resource [cmdb_ci_cmp_resource] table.