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Semantic Conventions for Microsoft Cosmos DB

Status: Experimental

The Semantic Conventions for Microsoft Cosmos DB extend and override the Database Semantic Conventions that describe common database operations attributes in addition to the Semantic Conventions described on this page.

Call-level attributes

db.system MUST be set to "cosmosdb".

Cosmos DB instrumentation includes call-level (public API) surface spans and network spans. Depending on the connection mode (Gateway or Direct), network-level spans may also be created.

Attribute Type Description Examples Requirement Level
db.cosmosdb.client_id string Unique Cosmos client instance id. 3ba4827d-4422-483f-b59f-85b74211c11d Recommended
db.cosmosdb.operation_type string CosmosDB Operation Type. Invalid Conditionally Required: [1]
db.cosmosdb.connection_mode string Cosmos client connection mode. gateway Conditionally Required: if not direct (or pick gw as default)
db.cosmosdb.container string Cosmos DB container name. anystring Conditionally Required: if available
db.cosmosdb.request_content_length int Request payload size in bytes Recommended
db.cosmosdb.status_code int Cosmos DB status code. 200; 201 Conditionally Required: if response was received
db.cosmosdb.sub_status_code int Cosmos DB sub status code. 1000; 1002 Conditionally Required: [2]
db.cosmosdb.request_charge double RU consumed for that operation 46.18; 1.0 Conditionally Required: when available
user_agent.original string Full user-agent string is generated by Cosmos DB SDK [3] cosmos-netstandard-sdk/3.23.0|3.23.1|1|X64|Linux 5.4.0-1098-azure 104 18|.NET Core 3.1.32|S| Recommended

[1]: when performing one of the operations in this list

[2]: when response was received and contained sub-code.

[3]: The user-agent value is generated by SDK which is a combination of
sdk_version : Current version of SDK. e.g. 'cosmos-netstandard-sdk/3.23.0'
direct_pkg_version : Direct package version used by Cosmos DB SDK. e.g. '3.23.1'
number_of_client_instances : Number of cosmos client instances created by the application. e.g. '1'
type_of_machine_architecture : Machine architecture. e.g. 'X64'
operating_system : Operating System. e.g. 'Linux 5.4.0-1098-azure 104 18'
runtime_framework : Runtime Framework. e.g. '.NET Core 3.1.32'
failover_information : Generated key to determine if region failover enabled. Format Reg-{D (Disabled discovery)}-S(application region)|L(List of preferred regions)|N(None, user did not configure it). Default value is "NS".

db.cosmosdb.operation_type has the following list of well-known values. If one of them applies, then the respective value MUST be used, otherwise a custom value MAY be used.

Value Description
Invalid invalid
Create create
Patch patch
Read read
ReadFeed read_feed
Delete delete
Replace replace
Execute execute
Query query
Head head
HeadFeed head_feed
Upsert upsert
Batch batch
QueryPlan query_plan
ExecuteJavaScript execute_javascript

db.cosmosdb.connection_mode MUST be one of the following:

Value Description
gateway Gateway (HTTP) connections mode
direct Direct connection.

In addition to Cosmos DB attributes, all spans include az.namespace attribute representing Azure Resource Provider namespace that MUST be equal to Microsoft.DocumentDB.

Example

Key Value
Span name "ReadItemsAsync"
kind "internal"
az.namespace "Microsoft.DocumentDB"
db.system "cosmosdb"
db.name "database name"
db.operation "ReadItemsAsync"
server.address "account.documents.azure.com"
db.cosmosdb.client_id 3ba4827d-4422-483f-b59f-85b74211c11d
db.cosmosdb.operation_type Read
user_agent.original cosmos-netstandard-sdk/3.23.0|3.23.1|1|X64|Linux 5.4.0-1098-azure 104 18|.NET Core 3.1.32|S|
db.cosmosdb.connection_mode "Direct"
db.cosmosdb.container "container name"
db.cosmosdb.request_content_length 20
db.cosmosdb.status_code 201
db.cosmosdb.sub_status_code 0
db.cosmosdb.request_charge 7.43