The meter provider defines how metrics are exported when collecting telemetry data. It is unlikely that you need to call this function directly, but read on to learn how to configure which exporter to use.
get_default_meter_provider()The default meter provider, an otel_meter_provider
object.
If there is no default set currently, then it creates and sets a default.
The default meter provider is created based on the OTEL_R_METRICS_EXPORTER environment variable. This environment variable is specifically for R applications with OpenTelemetry support.
If this is not set, then the generic OTEL_METRICS_EXPORTER environment variable is used. This applies to all applications that support OpenTelemetry and use the OpenTelemetry SDK.
The following values are allowed:
none: no metrics are exported.
stdout or console: uses otelsdk::meter_provider_stdstream,
to write metrics to the standard output.
stderr: uses otelsdk::meter_provider_stdstream, to write
metrics to the standard error.
http or otlp: uses otelsdk::meter_provider_http, to send
metrics through HTTP, using the OpenTelemetry Protocol (OTLP).
otlp/file uses otelsdk::meter_provider_file to write metrics
to a JSONL file.
<package>::<provider>: will select the <provider> object from
the <package> package to use as a meter provider. It calls
<package>::<provider>$new() to create the new meter provider.
If this fails for some reason, e.g. the package is not installed,
then it throws an error.
Other low level metrics API:
get_meter(),
meter_provider_noop,
otel_counter,
otel_gauge,
otel_histogram,
otel_meter,
otel_meter_provider,
otel_up_down_counter