tailsamplingprocessor

Documentation

Index

• func NewTraceProcessor(logger *zap.Logger, nextConsumer consumer.TraceConsumer, cfg Config) (processor.TraceProcessor, error)
• func SamplingProcessorMetricViews(level telemetry.Level) []*view.View
• type Config
• type Factory
  • func (f *Factory) CreateDefaultConfig() configmodels.Processor
  • func (f *Factory) CreateMetricsProcessor(logger *zap.Logger, nextConsumer consumer.MetricsConsumer, ...) (processor.MetricsProcessor, error)
  • func (f *Factory) CreateTraceProcessor(logger *zap.Logger, nextConsumer consumer.TraceConsumer, ...) (processor.TraceProcessor, error)
  • func (f *Factory) Type() string
• type NumericAttributeCfg
• type Policy
• type PolicyCfg
• type PolicyType
• type RateLimitingCfg
• type StringAttributeCfg

Functions

func NewTraceProcessor

func NewTraceProcessor(logger *zap.Logger, nextConsumer consumer.TraceConsumer, cfg Config) (processor.TraceProcessor, error)

NewTraceProcessor returns a processor.TraceProcessor that will perform tail sampling according to the given configuration.

func SamplingProcessorMetricViews

func SamplingProcessorMetricViews(level telemetry.Level) []*view.View

SamplingProcessorMetricViews return the metrics views according to given telemetry level.

Types

type Config

type Config struct {
	configmodels.ProcessorSettings `mapstructure:",squash"`
	// DecisionWait is the desired wait time from the arrival of the first span of
	// trace until the decision about sampling it or not is evaluated.
	DecisionWait time.Duration `mapstructure:"decision_wait"`
	// NumTraces is the number of traces kept on memory. Typically most of the data
	// of a trace is released after a sampling decision is taken.
	NumTraces uint64 `mapstructure:"num_traces"`
	// ExpectedNewTracesPerSec sets the expected number of new traces sending to the tail sampling processor
	// per second. This helps with allocating data structures with closer to actual usage size.
	ExpectedNewTracesPerSec uint64 `mapstructure:"expected_new_traces_per_sec"`
	// PolicyCfgs sets the tail-based sampling policy which makes a sampling decision
	// for a given trace when requested.
	PolicyCfgs []PolicyCfg `mapstructure:"policies"`
}

Config holds the configuration for tail-based sampling.

type Factory

type Factory struct {
}

Factory is the factory for Tail Sampling processor.

func (*Factory) CreateDefaultConfig

func (f *Factory) CreateDefaultConfig() configmodels.Processor

CreateDefaultConfig creates the default configuration for processor.

func (*Factory) CreateMetricsProcessor

func (f *Factory) CreateMetricsProcessor(
	logger *zap.Logger,
	nextConsumer consumer.MetricsConsumer,
	cfg configmodels.Processor,
) (processor.MetricsProcessor, error)

CreateMetricsProcessor creates a metrics processor based on this config.

func (*Factory) CreateTraceProcessor

func (f *Factory) CreateTraceProcessor(
	logger *zap.Logger,
	nextConsumer consumer.TraceConsumer,
	cfg configmodels.Processor,
) (processor.TraceProcessor, error)

CreateTraceProcessor creates a trace processor based on this config.

func (*Factory) Type

func (f *Factory) Type() string

Type gets the type of the config created by this factory.

type NumericAttributeCfg

type NumericAttributeCfg struct {
	// Tag that the filter is going to be matching against.
	Key string `mapstructure:"key"`
	// MinValue is the minimum value of the attribute to be considered a match.
	MinValue int64 `mapstructure:"min_value"`
	// MaxValue is the maximum value of the attribute to be considered a match.
	MaxValue int64 `mapstructure:"max_value"`
}

NumericAttributeCfg holds the configurable settings to create a numeric attribute filter sampling policy evaluator.

type Policy

type Policy struct {
	// Name used to identify this policy instance.
	Name string
	// Evaluator that decides if a trace is sampled or not by this policy instance.
	Evaluator sampling.PolicyEvaluator
	// contains filtered or unexported fields
}

Policy combines a sampling policy evaluator with the destinations to be used for that policy.

type PolicyCfg

type PolicyCfg struct {
	// Name given to the instance of the policy to make easy to identify it in metrics and logs.
	Name string `mapstructure:"name"`
	// Type of the policy this will be used to match the proper configuration of the policy.
	Type PolicyType `mapstructure:"type"`
	// Configs for numeric attribute filter sampling policy evaluator.
	NumericAttributeCfg NumericAttributeCfg `mapstructure:"numeric_attribute"`
	// Configs for string attribute filter sampling policy evaluator.
	StringAttributeCfg StringAttributeCfg `mapstructure:"string_attribute"`
	// Configs for rate limiting filter sampling policy evaluator.
	RateLimitingCfg RateLimitingCfg `mapstructure:"rate_limiting"`
}

PolicyCfg holds the common configuration to all policies.

type PolicyType

type PolicyType string

PolicyType indicates the type of sampling policy.

const (
	// AlwaysSample samples all traces, typically used for debugging.
	AlwaysSample PolicyType = "always_sample"
	// NumericAttribute sample traces that have a given numeric attribute in a specified
	// range, e.g.: attribute "http.status_code" >= 399 and <= 999.
	NumericAttribute PolicyType = "numeric_attribute"
	// StringAttribute sample traces that a attribute, of type string, matching
	// one of the listed values.
	StringAttribute PolicyType = "string_attribute"
	// RateLimiting allows all traces until the specified limits are satisfied.
	RateLimiting PolicyType = "rate_limiting"
)

type RateLimitingCfg

type RateLimitingCfg struct {
	// SpansPerSecond sets the limit on the maximum nuber of spans that can be processed each second.
	SpansPerSecond int64 `mapstructure:"spans_per_second"`
}

RateLimitingCfg holds the configurable settings to create a rate limiting sampling policy evaluator.

type StringAttributeCfg

type StringAttributeCfg struct {
	// Tag that the filter is going to be matching against.
	Key string `mapstructure:"key"`
	// Values is the set of attribute values that if any is equal to the actual attribute value to be considered a match.
	Values []string `mapstructure:"values"`
}

StringAttributeCfg holds the configurable settings to create a string attribute filter sampling policy evaluator.