123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106 |
- // Copyright (c) 2017 Uber Technologies, Inc.
- //
- // 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.
- package jaeger
- import (
- "fmt"
- "github.com/opentracing/opentracing-go"
- )
- const (
- // JaegerClientVersion is the version of the client library reported as Span tag.
- JaegerClientVersion = "Go-2.30.0"
- // JaegerClientVersionTagKey is the name of the tag used to report client version.
- JaegerClientVersionTagKey = "jaeger.version"
- // JaegerDebugHeader is the name of HTTP header or a TextMap carrier key which,
- // if found in the carrier, forces the trace to be sampled as "debug" trace.
- // The value of the header is recorded as the tag on the root span, so that the
- // trace can be found in the UI using this value as a correlation ID.
- JaegerDebugHeader = "jaeger-debug-id"
- // JaegerBaggageHeader is the name of the HTTP header that is used to submit baggage.
- // It differs from TraceBaggageHeaderPrefix in that it can be used only in cases where
- // a root span does not exist.
- JaegerBaggageHeader = "jaeger-baggage"
- // TracerHostnameTagKey used to report host name of the process.
- TracerHostnameTagKey = "hostname"
- // TracerIPTagKey used to report ip of the process.
- TracerIPTagKey = "ip"
- // TracerUUIDTagKey used to report UUID of the client process.
- TracerUUIDTagKey = "client-uuid"
- // SamplerTypeTagKey reports which sampler was used on the root span.
- SamplerTypeTagKey = "sampler.type"
- // SamplerParamTagKey reports the parameter of the sampler, like sampling probability.
- SamplerParamTagKey = "sampler.param"
- // TraceContextHeaderName is the http header name used to propagate tracing context.
- // This must be in lower-case to avoid mismatches when decoding incoming headers.
- TraceContextHeaderName = "uber-trace-id"
- // TracerStateHeaderName is deprecated.
- // Deprecated: use TraceContextHeaderName
- TracerStateHeaderName = TraceContextHeaderName
- // TraceBaggageHeaderPrefix is the prefix for http headers used to propagate baggage.
- // This must be in lower-case to avoid mismatches when decoding incoming headers.
- TraceBaggageHeaderPrefix = "uberctx-"
- // SamplerTypeConst is the type of sampler that always makes the same decision.
- SamplerTypeConst = "const"
- // SamplerTypeRemote is the type of sampler that polls Jaeger agent for sampling strategy.
- SamplerTypeRemote = "remote"
- // SamplerTypeProbabilistic is the type of sampler that samples traces
- // with a certain fixed probability.
- SamplerTypeProbabilistic = "probabilistic"
- // SamplerTypeRateLimiting is the type of sampler that samples
- // only up to a fixed number of traces per second.
- SamplerTypeRateLimiting = "ratelimiting"
- // SamplerTypeLowerBound is the type of sampler that samples
- // at least a fixed number of traces per second.
- SamplerTypeLowerBound = "lowerbound"
- // DefaultUDPSpanServerHost is the default host to send the spans to, via UDP
- DefaultUDPSpanServerHost = "localhost"
- // DefaultUDPSpanServerPort is the default port to send the spans to, via UDP
- DefaultUDPSpanServerPort = 6831
- // DefaultSamplingServerPort is the default port to fetch sampling config from, via http
- DefaultSamplingServerPort = 5778
- // DefaultMaxTagValueLength is the default max length of byte array or string allowed in the tag value.
- DefaultMaxTagValueLength = 256
- // SelfRefType is a jaeger specific reference type that supports creating a span
- // with an already defined context.
- selfRefType opentracing.SpanReferenceType = 99
- )
- var (
- // DefaultSamplingServerURL is the default url to fetch sampling config from, via http
- DefaultSamplingServerURL = fmt.Sprintf("http://127.0.0.1:%d/sampling", DefaultSamplingServerPort)
- )
|