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186 lines
7.2 KiB
186 lines
7.2 KiB
// Copyright 2018, OpenCensus Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ochttp
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import (
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"go.opencensus.io/stats"
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"go.opencensus.io/stats/view"
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"go.opencensus.io/tag"
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)
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// The following client HTTP measures are supported for use in custom views.
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var (
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ClientRequestCount = stats.Int64("opencensus.io/http/client/request_count", "Number of HTTP requests started", stats.UnitDimensionless)
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ClientRequestBytes = stats.Int64("opencensus.io/http/client/request_bytes", "HTTP request body size if set as ContentLength (uncompressed)", stats.UnitBytes)
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ClientResponseBytes = stats.Int64("opencensus.io/http/client/response_bytes", "HTTP response body size (uncompressed)", stats.UnitBytes)
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ClientLatency = stats.Float64("opencensus.io/http/client/latency", "End-to-end latency", stats.UnitMilliseconds)
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)
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// The following server HTTP measures are supported for use in custom views:
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var (
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ServerRequestCount = stats.Int64("opencensus.io/http/server/request_count", "Number of HTTP requests started", stats.UnitDimensionless)
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ServerRequestBytes = stats.Int64("opencensus.io/http/server/request_bytes", "HTTP request body size if set as ContentLength (uncompressed)", stats.UnitBytes)
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ServerResponseBytes = stats.Int64("opencensus.io/http/server/response_bytes", "HTTP response body size (uncompressed)", stats.UnitBytes)
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ServerLatency = stats.Float64("opencensus.io/http/server/latency", "End-to-end latency", stats.UnitMilliseconds)
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)
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// The following tags are applied to stats recorded by this package. Host, Path
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// and Method are applied to all measures. StatusCode is not applied to
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// ClientRequestCount or ServerRequestCount, since it is recorded before the status is known.
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var (
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// Host is the value of the HTTP Host header.
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//
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// The value of this tag can be controlled by the HTTP client, so you need
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// to watch out for potentially generating high-cardinality labels in your
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// metrics backend if you use this tag in views.
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Host, _ = tag.NewKey("http.host")
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// StatusCode is the numeric HTTP response status code,
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// or "error" if a transport error occurred and no status code was read.
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StatusCode, _ = tag.NewKey("http.status")
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// Path is the URL path (not including query string) in the request.
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//
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// The value of this tag can be controlled by the HTTP client, so you need
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// to watch out for potentially generating high-cardinality labels in your
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// metrics backend if you use this tag in views.
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Path, _ = tag.NewKey("http.path")
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// Method is the HTTP method of the request, capitalized (GET, POST, etc.).
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Method, _ = tag.NewKey("http.method")
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// KeyServerRoute is a low cardinality string representing the logical
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// handler of the request. This is usually the pattern registered on the a
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// ServeMux (or similar string).
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KeyServerRoute, _ = tag.NewKey("http_server_route")
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)
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// Default distributions used by views in this package.
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var (
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DefaultSizeDistribution = view.Distribution(0, 1024, 2048, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216, 67108864, 268435456, 1073741824, 4294967296)
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DefaultLatencyDistribution = view.Distribution(0, 1, 2, 3, 4, 5, 6, 8, 10, 13, 16, 20, 25, 30, 40, 50, 65, 80, 100, 130, 160, 200, 250, 300, 400, 500, 650, 800, 1000, 2000, 5000, 10000, 20000, 50000, 100000)
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)
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// Package ochttp provides some convenience views.
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// You need to register the views for data to actually be collected.
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var (
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ClientRequestCountView = &view.View{
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Name: "opencensus.io/http/client/request_count",
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Description: "Count of HTTP requests started",
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Measure: ClientRequestCount,
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Aggregation: view.Count(),
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}
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ClientRequestBytesView = &view.View{
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Name: "opencensus.io/http/client/request_bytes",
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Description: "Size distribution of HTTP request body",
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Measure: ClientRequestBytes,
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Aggregation: DefaultSizeDistribution,
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}
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ClientResponseBytesView = &view.View{
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Name: "opencensus.io/http/client/response_bytes",
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Description: "Size distribution of HTTP response body",
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Measure: ClientResponseBytes,
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Aggregation: DefaultSizeDistribution,
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}
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ClientLatencyView = &view.View{
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Name: "opencensus.io/http/client/latency",
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Description: "Latency distribution of HTTP requests",
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Measure: ClientLatency,
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Aggregation: DefaultLatencyDistribution,
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}
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ClientRequestCountByMethod = &view.View{
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Name: "opencensus.io/http/client/request_count_by_method",
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Description: "Client request count by HTTP method",
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TagKeys: []tag.Key{Method},
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Measure: ClientRequestCount,
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Aggregation: view.Count(),
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}
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ClientResponseCountByStatusCode = &view.View{
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Name: "opencensus.io/http/client/response_count_by_status_code",
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Description: "Client response count by status code",
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TagKeys: []tag.Key{StatusCode},
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Measure: ClientLatency,
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Aggregation: view.Count(),
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}
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ServerRequestCountView = &view.View{
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Name: "opencensus.io/http/server/request_count",
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Description: "Count of HTTP requests started",
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Measure: ServerRequestCount,
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Aggregation: view.Count(),
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}
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ServerRequestBytesView = &view.View{
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Name: "opencensus.io/http/server/request_bytes",
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Description: "Size distribution of HTTP request body",
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Measure: ServerRequestBytes,
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Aggregation: DefaultSizeDistribution,
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}
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ServerResponseBytesView = &view.View{
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Name: "opencensus.io/http/server/response_bytes",
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Description: "Size distribution of HTTP response body",
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Measure: ServerResponseBytes,
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Aggregation: DefaultSizeDistribution,
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}
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ServerLatencyView = &view.View{
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Name: "opencensus.io/http/server/latency",
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Description: "Latency distribution of HTTP requests",
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Measure: ServerLatency,
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Aggregation: DefaultLatencyDistribution,
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}
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ServerRequestCountByMethod = &view.View{
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Name: "opencensus.io/http/server/request_count_by_method",
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Description: "Server request count by HTTP method",
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TagKeys: []tag.Key{Method},
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Measure: ServerRequestCount,
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Aggregation: view.Count(),
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}
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ServerResponseCountByStatusCode = &view.View{
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Name: "opencensus.io/http/server/response_count_by_status_code",
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Description: "Server response count by status code",
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TagKeys: []tag.Key{StatusCode},
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Measure: ServerLatency,
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Aggregation: view.Count(),
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}
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)
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// DefaultClientViews are the default client views provided by this package.
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var DefaultClientViews = []*view.View{
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ClientRequestCountView,
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ClientRequestBytesView,
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ClientResponseBytesView,
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ClientLatencyView,
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ClientRequestCountByMethod,
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ClientResponseCountByStatusCode,
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}
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// DefaultServerViews are the default server views provided by this package.
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var DefaultServerViews = []*view.View{
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ServerRequestCountView,
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ServerRequestBytesView,
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ServerResponseBytesView,
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ServerLatencyView,
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ServerRequestCountByMethod,
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ServerResponseCountByStatusCode,
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}
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