Package google.api

Index

Distribution

Distribution contains summary statistics for a population of values. It optionally contains a histogram representing the distribution of those values across a set of buckets.

The summary statistics are the count, mean, sum of the squared deviation from the mean, the minimum, and the maximum of the set of population of values. The histogram is based on a sequence of buckets and gives a count of values that fall into each bucket. The boundaries of the buckets are given either explicitly or by formulas for buckets of fixed or exponentially increasing widths.

Although it is not forbidden, it is generally a bad idea to include non-finite values (infinities or NaNs) in the population of values, as this will render the mean and sum_of_squared_deviation fields meaningless.

Fields
count

int64

The number of values in the population. Must be non-negative. This value must equal the sum of the values in bucket_counts if a histogram is provided.

mean

double

The arithmetic mean of the values in the population. If count is zero then this field must be zero.

sum_of_squared_deviation

double

The sum of squared deviations from the mean of the values in the population. For values x_i this is:

Sum[i=1..n]((x_i - mean)^2)

Knuth, "The Art of Computer Programming", Vol. 2, page 323, 3rd edition describes Welford's method for accumulating this sum in one pass.

If count is zero then this field must be zero.

range

Range

If specified, contains the range of the population values. The field must not be present if the count is zero. This field is presently ignored by the Stackdriver Monitoring API v3.

bucket_options

BucketOptions

Required in the Stackdriver Monitoring API v3. Defines the histogram bucket boundaries.

bucket_counts[]

int64

Required in the Stackdriver Monitoring API v3. The values for each bucket specified in bucket_options. The sum of the values in bucketCounts must equal the value in the count field of the Distribution object. The order of the bucket counts follows the numbering schemes described for the three bucket types. The underflow bucket has number 0; the finite buckets, if any, have numbers 1 through N-2; and the overflow bucket has number N-1. The size of bucket_counts must not be greater than N. If the size is less than N, then the remaining buckets are assigned values of zero.

BucketOptions

BucketOptions describes the bucket boundaries used to create a histogram for the distribution. The buckets can be in a linear sequence, an exponential sequence, or each bucket can be specified explicitly. BucketOptions does not include the number of values in each bucket.

A bucket has an inclusive lower bound and exclusive upper bound for the values that are counted for that bucket. The upper bound of a bucket must be strictly greater than the lower bound. The sequence of N buckets for a distribution consists of an underflow bucket (number 0), zero or more finite buckets (number 1 through N - 2) and an overflow bucket (number N - 1). The buckets are contiguous: the lower bound of bucket i (i > 0) is the same as the upper bound of bucket i - 1. The buckets span the whole range of finite values: lower bound of the underflow bucket is -infinity and the upper bound of the overflow bucket is +infinity. The finite buckets are so-called because both bounds are finite.

Fields
Union field options. Exactly one of these three fields must be set. options can be only one of the following:
linear_buckets

Linear

The linear bucket.

exponential_buckets

Exponential

The exponential buckets.

explicit_buckets

Explicit

The explicit buckets.

Explicit

Specifies a set of buckets with arbitrary widths.

There are size(bounds) + 1 (= N) buckets. Bucket i has the following boundaries:

Upper bound (0 <= i < N-1): bounds[i] Lower bound (1 <= i < N); bounds[i - 1]

The bounds field must contain at least one element. If bounds has only one element, then there are no finite buckets, and that single element is the common boundary of the overflow and underflow buckets.

Fields
bounds[]

double

The values must be monotonically increasing.

Exponential

Specifies an exponential sequence of buckets that have a width that is proportional to the value of the lower bound. Each bucket represents a constant relative uncertainty on a specific value in the bucket.

There are num_finite_buckets + 2 (= N) buckets. Bucket i has the following boundaries:

Upper bound (0 <= i < N-1): scale * (growth_factor ^ i). Lower bound (1 <= i < N): scale * (growth_factor ^ (i - 1)).

Fields
num_finite_buckets

int32

Must be greater than 0.

growth_factor

double

Must be greater than 1.

scale

double

Must be greater than 0.

Linear

Specifies a linear sequence of buckets that all have the same width (except overflow and underflow). Each bucket represents a constant absolute uncertainty on the specific value in the bucket.

There are num_finite_buckets + 2 (= N) buckets. Bucket i has the following boundaries:

Upper bound (0 <= i < N-1): offset + (width * i). Lower bound (1 <= i < N): offset + (width * (i - 1)).

Fields
num_finite_buckets

int32

Must be greater than 0.

width

double

Must be greater than 0.

offset

double

Lower bound of the first bucket.

Range

The range of the population values.

Fields
min

double

The minimum of the population values.

max

double

The maximum of the population values.

LabelDescriptor

A description of a label.

Fields
key

string

The label key.

value_type

ValueType

The type of data that can be assigned to the label.

description

string

A human-readable description for the label.

ValueType

Value types that can be used as label values.

Enums
STRING A variable-length string. This is the default.
BOOL Boolean; true or false.
INT64 A 64-bit signed integer.

Metric

A specific metric, identified by specifying values for all of the labels of a MetricDescriptor.

Fields
type

string

An existing metric type, see google.api.MetricDescriptor. For example, custom.googleapis.com/invoice/paid/amount.

labels

map<string, string>

The set of label values that uniquely identify this metric. All labels listed in the MetricDescriptor must be assigned values.

MetricDescriptor

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.

Fields
name

string

The resource name of the metric descriptor.

type

string

The metric type, including its DNS name prefix. The type is not URL-encoded. All user-defined custom metric types have the DNS name custom.googleapis.com. Metric types should use a natural hierarchical grouping. For example:

"custom.googleapis.com/invoice/paid/amount"
"appengine.googleapis.com/http/server/response_latencies"

labels[]

LabelDescriptor

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.

metric_kind

MetricKind

Whether the metric records instantaneous values, changes to a value, etc. Some combinations of metric_kind and value_type might not be supported.

value_type

ValueType

Whether the measurement is an integer, a floating-point number, etc. Some combinations of metric_kind and value_type might not be supported.

unit

string

Optional. The unit in which the metric value is reported. For example, kBy/s means kilobytes/sec, and 1 is the dimensionless unit. The supported units are a subset of The Unified Code for Units of Measure standard.

This field is part of the metric's documentation, but it is ignored by Stackdriver.

description

string

A detailed description of the metric, which can be used in documentation.

display_name

string

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.

MetricKind

The kind of measurement. It describes how the data is reported.

Enums
METRIC_KIND_UNSPECIFIED Do not use this default value.
GAUGE An instantaneous measurement of a value.
DELTA The change in a value during a time interval.
CUMULATIVE 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.

ValueType

The value type of a metric.

Enums
VALUE_TYPE_UNSPECIFIED Do not use this default value.
BOOL The value is a boolean. This value type can be used only if the metric kind is GAUGE.
INT64 The value is a signed 64-bit integer.
DOUBLE The value is a double precision floating point number.
STRING The value is a text string. This value type can be used only if the metric kind is GAUGE.
DISTRIBUTION The value is a Distribution.
MONEY The value is money.

MonitoredResource

An object representing a resource that can be used for monitoring, logging, billing, or other purposes. Examples include virtual machine instances, databases, and storage devices such as disks. The type field identifies a MonitoredResourceDescriptor object that describes the resource's schema. Information in the labels field identifies the actual resource and its attributes according to the schema. For example, a particular Compute Engine VM instance could be represented by the following object, because the MonitoredResourceDescriptor for "gce_instance" has labels "instance_id" and "zone":

{ "type": "gce_instance",
  "labels": { "instance_id": "12345678901234",
              "zone": "us-central1-a" }}
Fields
type

string

Required. The monitored resource type. This field must match the type field of a MonitoredResourceDescriptor object. For example, the type of a Compute Engine VM instance is gce_instance.

labels

map<string, string>

Required. Values for all of the labels listed in the associated monitored resource descriptor. For example, Compute Engine VM instances use the labels "project_id", "instance_id", and "zone".

MonitoredResourceDescriptor

An object that describes the schema of a MonitoredResource object using a type name and a set of labels. For example, the monitored resource descriptor for Google Compute Engine VM instances has a type of "gce_instance" and specifies the use of the labels "instance_id" and "zone" to identify particular VM instances.

Different APIs can support different monitored resource types. APIs generally provide a list method that returns the monitored resource descriptors used by the API.

Fields
name

string

Optional. The resource name of the monitored resource descriptor: "projects/{project_id}/monitoredResourceDescriptors/{type}" where {type} is the value of the type field in this object and {project_id} is a project ID that provides API-specific context for accessing the type. APIs that do not use project information can use the resource name format "monitoredResourceDescriptors/{type}".

type

string

Required. The monitored resource type. For example, the type "cloudsql_database" represents databases in Google Cloud SQL. The maximum length of this value is 256 characters.

display_name

string

Optional. A concise name for the monitored resource type that might be displayed in user interfaces. It should be a Title Cased Noun Phrase, without any article or other determiners. For example, "Google Cloud SQL Database".

description

string

Optional. A detailed description of the monitored resource type that might be used in documentation.

labels[]

LabelDescriptor

Required. A set of labels used to describe instances of this monitored resource type. For example, an individual Google Cloud SQL database is identified by values for the labels "database_id" and "zone".

MonitoredResourceMetadata

Auxiliary metadata for a MonitoredResource object. MonitoredResource objects contain the minimum set of information to uniquely identify a monitored resource instance. There is some other useful auxiliary metadata. Google Stackdriver Monitoring & Logging uses an ingestion pipeline to extract metadata for cloud resources of all types , and stores the metadata in this message.

Fields
system_labels

Struct

Output only. Values for predefined system metadata labels. System labels are a kind of metadata extracted by Google Stackdriver. Stackdriver determines what system labels are useful and how to obtain their values. Some examples: "machine_image", "vpc", "subnet_id", "security_group", "name", etc. System label values can be only strings, Boolean values, or a list of strings. For example:

{ "name": "my-test-instance",
  "security_group": ["a", "b", "c"],
  "spot_instance": false }

user_labels

map<string, string>

Output only. A map of user-defined metadata labels.

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