This is the OTLP file exporter.
It writes measurements to a JSONL file, each measurement is a line in
the file, a valid JSON value. The line separator is \n.
The preferred file extension is jsonl.
Select this tracer provider with OTEL_METRICS_EXPORTER=otlp/file.
meter_provider_file$new() returns an otel::otel_meter_provider
object.
meter_provider_file$options() returns a named list, the current
values of the options.
Externally:
OTEL_METRICS_EXPORTER=otlp/file
From R:
meter_provider_file$new(opts = NULL)
meter_provider_file$options()
opts: Named list of options. See below.
file_pattern: Output file pattern. Value is set from:
opts argument, or
OTEL_EXPORTER_OTLP_METRICS_FILE environment variable, or
OTEL_EXPORTER_OTLP_FILE environment variable, or
the default is: metrics-%N.jsonl.
May contain placeholders, see below.
alias_pattern: The file which always point to the latest file.
Value is set from:
opts argument, or
OTEL_EXPORTER_OTLP_METRICS_FILE_ALIAS environment variable, or
OTEL_EXPORTER_OTLP_FILE_ALIAS environment variable, or
the default is: metrics-latest.jsonl.
May contain placeholders, see below.
flush_interval: Interval to force flush output. A time interval
specification, see Time Interval Options. Value is set from
opts argument, or
OTEL_EXPORTER_OTLP_METRICS_FILE_FLUSH_INTERVAL environment variable, or
OTEL_EXPORTER_OTLP_FILE_FLUSH_INTERVAL environment variable, or
the default is 30s, thirty seconds.
flush_count: Force flush output after every flush_count records.
Value is set from
opts argument, or
OTEL_EXPORTER_OTLP_METRICS_FILE_FLUSH_COUNT environment variable, or
OTEL_EXPORTER_OTLP_FILE_FLUSH_COUNT environment variable, or
the default is 256.
file_size: File size to rotate output files. A file size
specification, see File Size Options. Value is set from
opts argument, or
OTEL_EXPORTER_OTLP_METRICS_FILE_FILE_SIZE environment variable, or
OTEL_EXPORTER_OTLP_FILE_FILE_SIZE environment variable, or
the default is 20MB.
rotate_size: How many rotated output files to keep. Value is set
from
opts argument, or
OTEL_EXPORTER_OTLP_METRICS_FILE_ROTATE_SIZE environment variable, or
OTEL_EXPORTER_OTLP_FILE_ROTATE_SIZE environment variable, or
the default is 10.
Special placeholders are available for file_pattern and
alias_pattern:
%Y: Writes year as a 4 digit decimal number.
%y: Writes last 2 digits of year as a decimal number (range [00,99]).
%m: Writes month as a decimal number (range [01,12]).
%j: Writes day of the year as a decimal number (range [001,366]).
%d: Writes day of the month as a decimal number (range [01,31]).
%w: Writes weekday as a decimal number, where Sunday is 0
(range [0-6]).
%H: Writes hour as a decimal number, 24 hour clock (range [00-23]).
%I: Writes hour as a decimal number, 12 hour clock (range [01,12]).
%M: Writes minute as a decimal number (range [00,59]).
%S: Writes second as a decimal number (range [00,60]).
%F: Equivalent to %Y-%m-%d (the ISO 8601 date format).
%T: Equivalent to %H:%M:%S (the ISO 8601 time format).
%R: Equivalent to %H:%M.
%N: Rotate index, start from 0.
%n: Rotate index, start from 1.
export_interval: the time interval between the
start of two export attempts, in milliseconds. Value is set from
the opts argument, or
the OTEL_METRIC_EXPORT_INTERVAL environment variable, or
the default is 60000.
export_timeout: Maximum allowed time to export data, in
milliseconds. Value is set from
the opts argument, or
the OTEL_METRIC_EXPORT_TIMEOUT environment variable, or
the default is 30000.