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// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
syntax = "proto3";
package google.api;
import "google/api/label.proto";
import "google/api/launch_stage.proto";
import "google/protobuf/duration.proto";
option go_package = "google.golang.org/genproto/googleapis/api/metric;metric";
option java_multiple_files = true;
option java_outer_classname = "MetricProto";
option java_package = "com.google.api";
option objc_class_prefix = "GAPI";
// Defines a metric type and its schema. Once a metric descriptor is created,
// deleting or altering it stops data collection and makes the metric type's
// existing data unusable.
//
message MetricDescriptor {
// The kind of measurement. It describes how the data is reported.
// For information on setting the start time and end time based on
// the MetricKind, see [TimeInterval][google.monitoring.v3.TimeInterval].
enum MetricKind {
// Do not use this default value.
METRIC_KIND_UNSPECIFIED = 0;
// An instantaneous measurement of a value.
GAUGE = 1;
// The change in a value during a time interval.
DELTA = 2;
// A value accumulated over a time interval. Cumulative
// measurements in a time series should have the same start time
// and increasing end times, until an event resets the cumulative
// value to zero and sets a new start time for the following
// points.
CUMULATIVE = 3;
}
// The value type of a metric.
enum ValueType {
// Do not use this default value.
VALUE_TYPE_UNSPECIFIED = 0;
// The value is a boolean.
// This value type can be used only if the metric kind is `GAUGE`.
BOOL = 1;
// The value is a signed 64-bit integer.
INT64 = 2;
// The value is a double precision floating point number.
DOUBLE = 3;
// The value is a text string.
// This value type can be used only if the metric kind is `GAUGE`.
STRING = 4;
// The value is a [`Distribution`][google.api.Distribution].
DISTRIBUTION = 5;
// The value is money.
MONEY = 6;
}
// Additional annotations that can be used to guide the usage of a metric.
message MetricDescriptorMetadata {
// Deprecated. Must use the
// [MetricDescriptor.launch_stage][google.api.MetricDescriptor.launch_stage]
// instead.
LaunchStage launch_stage = 1 [deprecated = true];
// The sampling period of metric data points. For metrics which are written
// periodically, consecutive data points are stored at this time interval,
// excluding data loss due to errors. Metrics with a higher granularity have
// a smaller sampling period.
google.protobuf.Duration sample_period = 2;
// The delay of data points caused by ingestion. Data points older than this
// age are guaranteed to be ingested and available to be read, excluding
// data loss due to errors.
google.protobuf.Duration ingest_delay = 3;
}
// The resource name of the metric descriptor.
string name = 1;
// The metric type, including its DNS name prefix. The type is not
// URL-encoded. All user-defined metric types have the DNS name
// `custom.googleapis.com` or `external.googleapis.com`. Metric types should
// use a natural hierarchical grouping. For example:
//
// "custom.googleapis.com/invoice/paid/amount"
// "external.googleapis.com/prometheus/up"
// "appengine.googleapis.com/http/server/response_latencies"
string type = 8;
// The set of labels that can be used to describe a specific
// instance of this metric type. For example, the
// `appengine.googleapis.com/http/server/response_latencies` metric
// type has a label for the HTTP response code, `response_code`, so
// you can look at latencies for successful responses or just
// for responses that failed.
repeated LabelDescriptor labels = 2;
// Whether the metric records instantaneous values, changes to a value, etc.
// Some combinations of `metric_kind` and `value_type` might not be supported.
MetricKind metric_kind = 3;
// Whether the measurement is an integer, a floating-point number, etc.
// Some combinations of `metric_kind` and `value_type` might not be supported.
ValueType value_type = 4;
// The units in which the metric value is reported. It is only applicable
// if the `value_type` is `INT64`, `DOUBLE`, or `DISTRIBUTION`. The `unit`
// defines the representation of the stored metric values.
//
// Different systems might scale the values to be more easily displayed (so a
// value of `0.02kBy` _might_ be displayed as `20By`, and a value of
// `3523kBy` _might_ be displayed as `3.5MBy`). However, if the `unit` is
// `kBy`, then the value of the metric is always in thousands of bytes, no
// matter how it might be displayed.
//
// If you want a custom metric to record the exact number of CPU-seconds used
// by a job, you can create an `INT64 CUMULATIVE` metric whose `unit` is
// `s{CPU}` (or equivalently `1s{CPU}` or just `s`). If the job uses 12,005
// CPU-seconds, then the value is written as `12005`.
//
// Alternatively, if you want a custom metric to record data in a more
// granular way, you can create a `DOUBLE CUMULATIVE` metric whose `unit` is
// `ks{CPU}`, and then write the value `12.005` (which is `12005/1000`),
// or use `Kis{CPU}` and write `11.723` (which is `12005/1024`).
//
// The supported units are a subset of [The Unified Code for Units of
// Measure](https://unitsofmeasure.org/ucum.html) standard:
//
// **Basic units (UNIT)**
//
// * `bit` bit
// * `By` byte
// * `s` second
// * `min` minute
// * `h` hour
// * `d` day
// * `1` dimensionless
//
// **Prefixes (PREFIX)**
//
// * `k` kilo (10^3)
// * `M` mega (10^6)
// * `G` giga (10^9)
// * `T` tera (10^12)
// * `P` peta (10^15)
// * `E` exa (10^18)
// * `Z` zetta (10^21)
// * `Y` yotta (10^24)
//
// * `m` milli (10^-3)
// * `u` micro (10^-6)
// * `n` nano (10^-9)
// * `p` pico (10^-12)
// * `f` femto (10^-15)
// * `a` atto (10^-18)
// * `z` zepto (10^-21)
// * `y` yocto (10^-24)
//
// * `Ki` kibi (2^10)
// * `Mi` mebi (2^20)
// * `Gi` gibi (2^30)
// * `Ti` tebi (2^40)
// * `Pi` pebi (2^50)
//
// **Grammar**
//
// The grammar also includes these connectors:
//
// * `/` division or ratio (as an infix operator). For examples,
// `kBy/{email}` or `MiBy/10ms` (although you should almost never
// have `/s` in a metric `unit`; rates should always be computed at
// query time from the underlying cumulative or delta value).
// * `.` multiplication or composition (as an infix operator). For
// examples, `GBy.d` or `k{watt}.h`.
//
// The grammar for a unit is as follows:
//
// Expression = Component { "." Component } { "/" Component } ;
//
// Component = ( [ PREFIX ] UNIT | "%" ) [ Annotation ]
// | Annotation
// | "1"
// ;
//
// Annotation = "{" NAME "}" ;
//
// Notes:
//
// * `Annotation` is just a comment if it follows a `UNIT`. If the annotation
// is used alone, then the unit is equivalent to `1`. For examples,
// `{request}/s == 1/s`, `By{transmitted}/s == By/s`.
// * `NAME` is a sequence of non-blank printable ASCII characters not
// containing `{` or `}`.
// * `1` represents a unitary [dimensionless
// unit](https://en.wikipedia.org/wiki/Dimensionless_quantity) of 1, such
// as in `1/s`. It is typically used when none of the basic units are
// appropriate. For example, "new users per day" can be represented as
// `1/d` or `{new-users}/d` (and a metric value `5` would mean "5 new
// users). Alternatively, "thousands of page views per day" would be
// represented as `1000/d` or `k1/d` or `k{page_views}/d` (and a metric
// value of `5.3` would mean "5300 page views per day").
// * `%` represents dimensionless value of 1/100, and annotates values giving
// a percentage (so the metric values are typically in the range of 0..100,
// and a metric value `3` means "3 percent").
// * `10^2.%` indicates a metric contains a ratio, typically in the range
// 0..1, that will be multiplied by 100 and displayed as a percentage
// (so a metric value `0.03` means "3 percent").
string unit = 5;
// A detailed description of the metric, which can be used in documentation.
string description = 6;
// A concise name for the metric, which can be displayed in user interfaces.
// Use sentence case without an ending period, for example "Request count".
// This field is optional but it is recommended to be set for any metrics
// associated with user-visible concepts, such as Quota.
string display_name = 7;
// Optional. Metadata which can be used to guide usage of the metric.
MetricDescriptorMetadata metadata = 10;
// Optional. The launch stage of the metric definition.
LaunchStage launch_stage = 12;
// Read-only. If present, then a [time
// series][google.monitoring.v3.TimeSeries], which is identified partially by
// a metric type and a
// [MonitoredResourceDescriptor][google.api.MonitoredResourceDescriptor], that
// is associated with this metric type can only be associated with one of the
// monitored resource types listed here.
repeated string monitored_resource_types = 13;
}
// A specific metric, identified by specifying values for all of the
// labels of a [`MetricDescriptor`][google.api.MetricDescriptor].
message Metric {
// An existing metric type, see
// [google.api.MetricDescriptor][google.api.MetricDescriptor]. For example,
// `custom.googleapis.com/invoice/paid/amount`.
string type = 3;
// The set of label values that uniquely identify this metric. All
// labels listed in the `MetricDescriptor` must be assigned values.
map labels = 2;
}
