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# run_telemetry
# `prefect.telemetry.run_telemetry`
## Classes
### `OTELSetter`
A setter for OpenTelemetry that supports Prefect's custom labels.
**Methods:**
#### `set`
```python theme={null}
set(self, carrier: KeyValueLabels, key: str, value: str) -> None
```
### `RunTelemetry`
A class for managing the telemetry of runs.
**Methods:**
#### `async_start_span`
```python theme={null}
async_start_span(self, run: FlowOrTaskRun, client: PrefectClient, parameters: dict[str, Any] | None = None) -> Span | None
```
#### `end_span_on_failure`
```python theme={null}
end_span_on_failure(self, terminal_message: str | None = None) -> None
```
End a span for a run on failure.
#### `end_span_on_success`
```python theme={null}
end_span_on_success(self) -> None
```
End a span for a run on success.
#### `record_exception`
```python theme={null}
record_exception(self, exc: BaseException) -> None
```
Record an exception on a span.
#### `start_span`
```python theme={null}
start_span(self, run: FlowOrTaskRun, client: SyncPrefectClient, parameters: dict[str, Any] | None = None) -> Span | None
```
#### `traceparent_from_span`
```python theme={null}
traceparent_from_span(span: Span) -> str | None
```
#### `update_run_name`
```python theme={null}
update_run_name(self, name: str) -> None
```
Update the name of the run.
#### `update_state`
```python theme={null}
update_state(self, new_state: State) -> None
```
Update a span with the state of a run.
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