prometheus-erl · NelsonVides · Mar 17, 2026 · Mar 17, 2026
diff --git a/include/prometheus_model.hrl b/include/prometheus_model.hrl
@@ -1,11 +1,11 @@
 %% -*- coding: utf-8 -*-
 %% Automatically generated, do not edit
-%% Generated by gpb_compile version 4.21.1
+%% Generated by gpb_compile version 4.21.7
 
 -ifndef(prometheus_model).
 -define(prometheus_model, true).
 
--define(prometheus_model_gpb_version, "4.21.1").
+-define(prometheus_model_gpb_version, "4.21.7").
 
 
 -ifndef('LABELPAIR_PB_H').
@@ -26,7 +26,9 @@
 -ifndef('COUNTER_PB_H').
 -define('COUNTER_PB_H', true).
 -record('Counter',
-        {value                  :: float() | integer() | infinity | '-infinity' | nan | undefined % = 1, optional
+        {value                  :: float() | integer() | infinity | '-infinity' | nan | undefined, % = 1, optional
+         exemplar               :: prometheus_model:'Exemplar'() | undefined, % = 2, optional
+         created_timestamp      :: prometheus_model:'Timestamp'() | undefined % = 3, optional
         }).
 -endif.
 
@@ -43,7 +45,8 @@
 -record('Summary',
         {sample_count           :: non_neg_integer() | undefined, % = 1, optional, 64 bits
          sample_sum             :: float() | integer() | infinity | '-infinity' | nan | undefined, % = 2, optional
-         quantile = []          :: [prometheus_model:'Quantile'()] | undefined % = 3, repeated
+         quantile = []          :: [prometheus_model:'Quantile'()] | undefined, % = 3, repeated
+         created_timestamp      :: prometheus_model:'Timestamp'() | undefined % = 4, optional
         }).
 -endif.
 
@@ -58,16 +61,48 @@
 -define('HISTOGRAM_PB_H', true).
 -record('Histogram',
         {sample_count           :: non_neg_integer() | undefined, % = 1, optional, 64 bits
+         sample_count_float     :: float() | integer() | infinity | '-infinity' | nan | undefined, % = 4, optional
          sample_sum             :: float() | integer() | infinity | '-infinity' | nan | undefined, % = 2, optional
-         bucket = []            :: [prometheus_model:'Bucket'()] | undefined % = 3, repeated
+         bucket = []            :: [prometheus_model:'Bucket'()] | undefined, % = 3, repeated
+         created_timestamp      :: prometheus_model:'Timestamp'() | undefined, % = 15, optional
+         schema                 :: integer() | undefined, % = 5, optional, 32 bits
+         zero_threshold         :: float() | integer() | infinity | '-infinity' | nan | undefined, % = 6, optional
+         zero_count             :: non_neg_integer() | undefined, % = 7, optional, 64 bits
+         zero_count_float       :: float() | integer() | infinity | '-infinity' | nan | undefined, % = 8, optional
+         negative_span = []     :: [prometheus_model:'BucketSpan'()] | undefined, % = 9, repeated
+         negative_delta = []    :: [integer()] | undefined, % = 10, repeated, 64 bits
+         negative_count = []    :: [float() | integer() | infinity | '-infinity' | nan] | undefined, % = 11, repeated
+         positive_span = []     :: [prometheus_model:'BucketSpan'()] | undefined, % = 12, repeated
+         positive_delta = []    :: [integer()] | undefined, % = 13, repeated, 64 bits
+         positive_count = []    :: [float() | integer() | infinity | '-infinity' | nan] | undefined, % = 14, repeated
+         exemplars = []         :: [prometheus_model:'Exemplar'()] | undefined % = 16, repeated
         }).
 -endif.
 
 -ifndef('BUCKET_PB_H').
 -define('BUCKET_PB_H', true).
 -record('Bucket',
         {cumulative_count       :: non_neg_integer() | undefined, % = 1, optional, 64 bits
-         upper_bound            :: float() | integer() | infinity | '-infinity' | nan | undefined % = 2, optional
+         cumulative_count_float :: float() | integer() | infinity | '-infinity' | nan | undefined, % = 4, optional
+         upper_bound            :: float() | integer() | infinity | '-infinity' | nan | undefined, % = 2, optional
+         exemplar               :: prometheus_model:'Exemplar'() | undefined % = 3, optional
+        }).
+-endif.
+
+-ifndef('BUCKETSPAN_PB_H').
+-define('BUCKETSPAN_PB_H', true).
+-record('BucketSpan',
+        {offset                 :: integer() | undefined, % = 1, optional, 32 bits
+         length                 :: non_neg_integer() | undefined % = 2, optional, 32 bits
+        }).
+-endif.
+
+-ifndef('EXEMPLAR_PB_H').
+-define('EXEMPLAR_PB_H', true).
+-record('Exemplar',
+        {label = []             :: [prometheus_model:'LabelPair'()] | undefined, % = 1, repeated
+         value                  :: float() | integer() | infinity | '-infinity' | nan | undefined, % = 2, optional
+         timestamp              :: prometheus_model:'Timestamp'() | undefined % = 3, optional
         }).
 -endif.
 
@@ -89,8 +124,17 @@
 -record('MetricFamily',
         {name                   :: unicode:chardata() | undefined, % = 1, optional
          help                   :: unicode:chardata() | undefined, % = 2, optional
-         type                   :: 'COUNTER' | 'GAUGE' | 'SUMMARY' | 'UNTYPED' | 'HISTOGRAM' | integer() | undefined, % = 3, optional, enum MetricType
-         metric = []            :: [prometheus_model:'Metric'()] | undefined % = 4, repeated
+         type                   :: 'COUNTER' | 'GAUGE' | 'SUMMARY' | 'UNTYPED' | 'HISTOGRAM' | 'GAUGE_HISTOGRAM' | integer() | undefined, % = 3, optional, enum io.prometheus.client.MetricType
+         metric = []            :: [prometheus_model:'Metric'()] | undefined, % = 4, repeated
+         unit                   :: unicode:chardata() | undefined % = 5, optional
+        }).
+-endif.
+
+-ifndef('TIMESTAMP_PB_H').
+-define('TIMESTAMP_PB_H', true).
+-record('Timestamp',
+        {seconds = 0            :: integer() | undefined, % = 1, optional, 64 bits
+         nanos = 0              :: integer() | undefined % = 2, optional, 32 bits
         }).
 -endif.
 

diff --git a/rebar.config b/rebar.config
@@ -60,6 +60,9 @@
             {i, "src/model"},
             {o_erl, "src/model"},
             {o_hrl, "include"},
+            {f, ["prometheus_model.proto"]},
+            {rename, {msg_fqname, base_name}},
+            use_packages,
             defs_as_proplists,
             strings_as_binaries,
             type_specs

diff --git a/rebar.config.script b/rebar.config.script
@@ -9,7 +9,8 @@ ErlOpts =
     case list_to_integer(erlang:system_info(otp_release)) of
         N when N >= 27 ->
             %[warn_missing_doc, warn_missing_spec, warn_untyped_record | ErlOpts0];
-            [warn_missing_spec, warn_untyped_record | ErlOpts0];
+            % warn_missing_spec omitted: prometheus_model is generated by gpb without full -specs
+            [warn_untyped_record | ErlOpts0];
         _ ->
             ErlOpts0
     end,

diff --git a/src/model/google/protobuf/timestamp.proto b/src/model/google/protobuf/timestamp.proto
@@ -0,0 +1,138 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package google.protobuf;
+
+option csharp_namespace = "Google.Protobuf.WellKnownTypes";
+option cc_enable_arenas = true;
+option go_package = "types";
+option java_package = "com.google.protobuf";
+option java_outer_classname = "TimestampProto";
+option java_multiple_files = true;
+option objc_class_prefix = "GPB";
+
+// A Timestamp represents a point in time independent of any time zone or local
+// calendar, encoded as a count of seconds and fractions of seconds at
+// nanosecond resolution. The count is relative to an epoch at UTC midnight on
+// January 1, 1970, in the proleptic Gregorian calendar which extends the
+// Gregorian calendar backwards to year one.
+//
+// All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap
+// second table is needed for interpretation, using a [24-hour linear
+// smear](https://developers.google.com/time/smear).
+//
+// The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By
+// restricting to that range, we ensure that we can convert to and from [RFC
+// 3339](https://www.ietf.org/rfc/rfc3339.txt) date strings.
+//
+// # Examples
+//
+// Example 1: Compute Timestamp from POSIX `time()`.
+//
+//     Timestamp timestamp;
+//     timestamp.set_seconds(time(NULL));
+//     timestamp.set_nanos(0);
+//
+// Example 2: Compute Timestamp from POSIX `gettimeofday()`.
+//
+//     struct timeval tv;
+//     gettimeofday(&tv, NULL);
+//
+//     Timestamp timestamp;
+//     timestamp.set_seconds(tv.tv_sec);
+//     timestamp.set_nanos(tv.tv_usec * 1000);
+//
+// Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.
+//
+//     FILETIME ft;
+//     GetSystemTimeAsFileTime(&ft);
+//     UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;
+//
+//     // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
+//     // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
+//     Timestamp timestamp;
+//     timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
+//     timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));
+//
+// Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
+//
+//     long millis = System.currentTimeMillis();
+//
+//     Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
+//         .setNanos((int) ((millis % 1000) * 1000000)).build();
+//
+//
+// Example 5: Compute Timestamp from current time in Python.
+//
+//     timestamp = Timestamp()
+//     timestamp.GetCurrentTime()
+//
+// # JSON Mapping
+//
+// In JSON format, the Timestamp type is encoded as a string in the
+// [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the
+// format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
+// where {year} is always expressed using four digits while {month}, {day},
+// {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional
+// seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),
+// are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone
+// is required. A proto3 JSON serializer should always use UTC (as indicated by
+// "Z") when printing the Timestamp type and a proto3 JSON parser should be
+// able to accept both UTC and other timezones (as indicated by an offset).
+//
+// For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
+// 01:30 UTC on January 15, 2017.
+//
+// In JavaScript, one can convert a Date object to this format using the
+// standard
+// [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString)
+// method. In Python, a standard `datetime.datetime` object can be converted
+// to this format using
+// [`strftime`](https://docs.python.org/2/library/time.html#time.strftime) with
+// the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use
+// the Joda Time's [`ISODateTimeFormat.dateTime()`](
+// http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D
+// ) to obtain a formatter capable of generating timestamps in this format.
+//
+//
+message Timestamp {
+  // Represents seconds of UTC time since Unix epoch
+  // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
+  // 9999-12-31T23:59:59Z inclusive.
+  int64 seconds = 1;
+
+  // Non-negative fractions of a second at nanosecond resolution. Negative
+  // second values with fractions must still have non-negative nanos values
+  // that count forward in time. Must be from 0 to 999,999,999
+  // inclusive.
+  int32 nanos = 2;
+}