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Add rpc.grpc.status_code attribute to rpc metric semantic conventions #2604

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Jun 30, 2022
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Add rpc.grpc.status_code attribute to rpc metric semantic conventions #2604

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Add rpc.grpc.status_code attribute to rpc metric semantic conventions
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45 changes: 40 additions & 5 deletions specification/metrics/semantic_conventions/rpc.md
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Expand Up @@ -3,9 +3,10 @@
**Status**: [Experimental](../../document-status.md)
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The conventions described in this section are RPC specific. When RPC operations
occur, metric events about those operations will be generated and reported to
provide insight into those operations. By adding RPC properties as attributes
on metric events it allows for finely tuned filtering.
occur, measurements about those operations are recorded to instruments. The
measurements are aggregated and exported as metrics, which provide insight into
those operations. By including RPC properties as attributes on measurements, the
metrics can be filtered for finer grain analysis.

<!-- Re-generate TOC with `markdown-toc --no-first-h1 -i` -->

Expand Down Expand Up @@ -54,8 +55,8 @@ RPC usage, not streaming RPCs.

## Attributes

Below is a table of attributes that SHOULD be included on metric events and whether
or not they should be on the server, client or both.
Below is a table of attributes that SHOULD be included on client and server RPC
measurements.

<!-- semconv rpc -->
| Attribute | Type | Description | Examples | Required |
Expand Down Expand Up @@ -112,4 +113,38 @@ For remote procedure calls via [gRPC][], additional conventions are described in

`rpc.system` MUST be set to `"grpc"`.

### gRPC Attributes

Below is a table of attributes that SHOULD be included on client and server RPC measurements when `rpc.system` is `"grpc"`.

<!-- semconv rpc -->
| Attribute | Type | Description | Examples | Required |
|-----------------------------------------------------------------------------------|------|--------------------------------------------------------------------------------------------------------------|----------|----------|
| [`rpc.grpc.status_code`](../../trace/semantic_conventions/rpc.md#grpc-attributes) | int | The [numeric status code](https://github.com/grpc/grpc/blob/v1.33.2/doc/statuscodes.md) of the gRPC request. | `0` | Yes |
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`rpc.grpc.status_code` MUST be one of the following:

| Value | Description |
|------|---------------------|
| `0` | OK |
| `1` | CANCELLED |
| `2` | UNKNOWN |
| `3` | INVALID_ARGUMENT |
| `4` | DEADLINE_EXCEEDED |
| `5` | NOT_FOUND |
| `6` | ALREADY_EXISTS |
| `7` | PERMISSION_DENIED |
| `8` | RESOURCE_EXHAUSTED |
| `9` | FAILED_PRECONDITION |
| `10` | ABORTED |
| `11` | OUT_OF_RANGE |
| `12` | UNIMPLEMENTED |
| `13` | INTERNAL |
| `14` | UNAVAILABLE |
| `15` | DATA_LOSS |
| `16` | UNAUTHENTICATED |
<!-- endsemconv -->

[gRPC]: https://grpc.io/

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[gRPC]: https://grpc.io/