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This field allows configuring unit conversions in mappings. For example: mappings: - match: foo.latency_ms name: foo_latency_seconds scale: 0.001 - match: bar.processed_kb name: bar_processed_bytes scale: 1024 Signed-off-by: Eddie Bracho <eddiebracho@gmail.com>
100 lines
3 KiB
Go
100 lines
3 KiB
Go
// Copyright 2020 The Prometheus Authors
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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 xpress 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 mapper
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import (
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"regexp"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/statsd_exporter/pkg/mapper/fsm"
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)
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type MetricMapping struct {
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Match string `yaml:"match"`
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Name string `yaml:"name"`
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nameFormatter *fsm.TemplateFormatter
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regex *regexp.Regexp
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Labels prometheus.Labels `yaml:"labels"`
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labelKeys []string
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labelFormatters []*fsm.TemplateFormatter
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ObserverType ObserverType `yaml:"observer_type"`
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TimerType ObserverType `yaml:"timer_type,omitempty"` // DEPRECATED - field only present to preserve backwards compatibility in configs. Always empty
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LegacyBuckets []float64 `yaml:"buckets"`
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LegacyQuantiles []MetricObjective `yaml:"quantiles"`
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MatchType MatchType `yaml:"match_type"`
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HelpText string `yaml:"help"`
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Action ActionType `yaml:"action"`
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MatchMetricType MetricType `yaml:"match_metric_type"`
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Ttl time.Duration `yaml:"ttl"`
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SummaryOptions *SummaryOptions `yaml:"summary_options"`
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HistogramOptions *HistogramOptions `yaml:"histogram_options"`
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Scale MaybeFloat64 `yaml:"scale"`
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}
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// UnmarshalYAML is a custom unmarshal function to allow use of deprecated config keys
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// observer_type will override timer_type
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func (m *MetricMapping) UnmarshalYAML(unmarshal func(interface{}) error) error {
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type MetricMappingAlias MetricMapping
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var tmp MetricMappingAlias
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if err := unmarshal(&tmp); err != nil {
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return err
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}
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// Copy defaults
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m.Match = tmp.Match
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m.Name = tmp.Name
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m.Labels = tmp.Labels
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m.ObserverType = tmp.ObserverType
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m.LegacyBuckets = tmp.LegacyBuckets
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m.LegacyQuantiles = tmp.LegacyQuantiles
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m.MatchType = tmp.MatchType
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m.HelpText = tmp.HelpText
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m.Action = tmp.Action
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m.MatchMetricType = tmp.MatchMetricType
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m.Ttl = tmp.Ttl
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m.SummaryOptions = tmp.SummaryOptions
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m.HistogramOptions = tmp.HistogramOptions
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m.Scale = tmp.Scale
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// Use deprecated TimerType if necessary
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if tmp.ObserverType == "" {
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m.ObserverType = tmp.TimerType
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}
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return nil
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}
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type MaybeFloat64 struct {
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Set bool
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Val float64
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}
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func (m *MaybeFloat64) MarshalYAML() (interface{}, error) {
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if m.Set {
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return m.Val, nil
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}
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return nil, nil
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}
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func (m *MaybeFloat64) UnmarshalYAML(unmarshal func(interface{}) error) error {
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var tmp float64
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if err := unmarshal(&tmp); err != nil {
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return err
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}
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m.Val = tmp
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m.Set = true
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return nil
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}
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