107 lines
4.1 KiB
Go
107 lines
4.1 KiB
Go
// Copyright (c) 2017 Uber Technologies, Inc.
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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 jaeger
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import (
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"fmt"
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"github.com/opentracing/opentracing-go"
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)
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const (
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// JaegerClientVersion is the version of the client library reported as Span tag.
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JaegerClientVersion = "Go-2.22.1"
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// JaegerClientVersionTagKey is the name of the tag used to report client version.
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JaegerClientVersionTagKey = "jaeger.version"
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// JaegerDebugHeader is the name of HTTP header or a TextMap carrier key which,
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// if found in the carrier, forces the trace to be sampled as "debug" trace.
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// The value of the header is recorded as the tag on the root span, so that the
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// trace can be found in the UI using this value as a correlation ID.
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JaegerDebugHeader = "jaeger-debug-id"
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// JaegerBaggageHeader is the name of the HTTP header that is used to submit baggage.
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// It differs from TraceBaggageHeaderPrefix in that it can be used only in cases where
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// a root span does not exist.
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JaegerBaggageHeader = "jaeger-baggage"
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// TracerHostnameTagKey used to report host name of the process.
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TracerHostnameTagKey = "hostname"
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// TracerIPTagKey used to report ip of the process.
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TracerIPTagKey = "ip"
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// TracerUUIDTagKey used to report UUID of the client process.
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TracerUUIDTagKey = "client-uuid"
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// SamplerTypeTagKey reports which sampler was used on the root span.
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SamplerTypeTagKey = "sampler.type"
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// SamplerParamTagKey reports the parameter of the sampler, like sampling probability.
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SamplerParamTagKey = "sampler.param"
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// TraceContextHeaderName is the http header name used to propagate tracing context.
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// This must be in lower-case to avoid mismatches when decoding incoming headers.
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TraceContextHeaderName = "uber-trace-id"
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// TracerStateHeaderName is deprecated.
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// Deprecated: use TraceContextHeaderName
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TracerStateHeaderName = TraceContextHeaderName
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// TraceBaggageHeaderPrefix is the prefix for http headers used to propagate baggage.
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// This must be in lower-case to avoid mismatches when decoding incoming headers.
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TraceBaggageHeaderPrefix = "uberctx-"
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// SamplerTypeConst is the type of sampler that always makes the same decision.
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SamplerTypeConst = "const"
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// SamplerTypeRemote is the type of sampler that polls Jaeger agent for sampling strategy.
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SamplerTypeRemote = "remote"
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// SamplerTypeProbabilistic is the type of sampler that samples traces
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// with a certain fixed probability.
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SamplerTypeProbabilistic = "probabilistic"
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// SamplerTypeRateLimiting is the type of sampler that samples
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// only up to a fixed number of traces per second.
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SamplerTypeRateLimiting = "ratelimiting"
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// SamplerTypeLowerBound is the type of sampler that samples
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// at least a fixed number of traces per second.
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SamplerTypeLowerBound = "lowerbound"
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// DefaultUDPSpanServerHost is the default host to send the spans to, via UDP
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DefaultUDPSpanServerHost = "localhost"
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// DefaultUDPSpanServerPort is the default port to send the spans to, via UDP
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DefaultUDPSpanServerPort = 6831
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// DefaultSamplingServerPort is the default port to fetch sampling config from, via http
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DefaultSamplingServerPort = 5778
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// DefaultMaxTagValueLength is the default max length of byte array or string allowed in the tag value.
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DefaultMaxTagValueLength = 256
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// SelfRefType is a jaeger specific reference type that supports creating a span
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// with an already defined context.
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selfRefType opentracing.SpanReferenceType = 99
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)
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var (
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// DefaultSamplingServerURL is the default url to fetch sampling config from, via http
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DefaultSamplingServerURL = fmt.Sprintf("http://localhost:%d/sampling", DefaultSamplingServerPort)
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)
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