opencensus.proto.trace.v1.trace_config.proto Maven / Gradle / Ivy
// Copyright 2018, OpenCensus Authors
//
// 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 opencensus.proto.trace.v1;
option java_multiple_files = true;
option java_package = "io.opencensus.proto.trace.v1";
option java_outer_classname = "TraceConfigProto";
option go_package = "github.com/census-instrumentation/opencensus-proto/gen-go/trace/v1";
option ruby_package = "OpenCensus::Proto::Trace::V1";
// Global configuration of the trace service. All fields must be specified, or
// the default (zero) values will be used for each type.
message TraceConfig {
// The global default sampler used to make decisions on span sampling.
oneof sampler {
ProbabilitySampler probability_sampler = 1;
ConstantSampler constant_sampler = 2;
RateLimitingSampler rate_limiting_sampler = 3;
}
// The global default max number of attributes per span.
int64 max_number_of_attributes = 4;
// The global default max number of annotation events per span.
int64 max_number_of_annotations = 5;
// The global default max number of message events per span.
int64 max_number_of_message_events = 6;
// The global default max number of link entries per span.
int64 max_number_of_links = 7;
}
// Sampler that tries to uniformly sample traces with a given probability.
// The probability of sampling a trace is equal to that of the specified probability.
message ProbabilitySampler {
// The desired probability of sampling. Must be within [0.0, 1.0].
double samplingProbability = 1;
}
// Sampler that always makes a constant decision on span sampling.
message ConstantSampler {
// How spans should be sampled:
// - Always off
// - Always on
// - Always follow the parent Span's decision (off if no parent).
enum ConstantDecision {
ALWAYS_OFF = 0;
ALWAYS_ON = 1;
ALWAYS_PARENT = 2;
}
ConstantDecision decision = 1;
}
// Sampler that tries to sample with a rate per time window.
message RateLimitingSampler {
// Rate per second.
int64 qps = 1;
}