mirror of
https://github.com/superseriousbusiness/gotosocial.git
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1ba3e14b36
* feat: Initial OTEL metrics * docs: add metrics documentation * fix: metrics endpoint conditional check * feat: metrics endpoint basic auth * fix: make metrics-auth-enabled default false * fix: go fmt helpers.gen.go * fix: add metric-related env vars to envparsing.sh * fix: metrics docs * fix: metrics related stuff in envparsing.sh * fix: metrics docs * chore: metrics docs wording * fix: metrics stuff in envparsing? * bump otel versions --------- Co-authored-by: Tsuribori <user@acertaindebian> Co-authored-by: Tsuribori <none@example.org> Co-authored-by: tsmethurst <tobi.smethurst@protonmail.com>
102 lines
3 KiB
Go
102 lines
3 KiB
Go
// Copyright 2018 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 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 internal
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import (
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"sort"
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dto "github.com/prometheus/client_model/go"
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)
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// LabelPairSorter implements sort.Interface. It is used to sort a slice of
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// dto.LabelPair pointers.
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type LabelPairSorter []*dto.LabelPair
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func (s LabelPairSorter) Len() int {
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return len(s)
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}
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func (s LabelPairSorter) Swap(i, j int) {
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s[i], s[j] = s[j], s[i]
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}
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func (s LabelPairSorter) Less(i, j int) bool {
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return s[i].GetName() < s[j].GetName()
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}
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// MetricSorter is a sortable slice of *dto.Metric.
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type MetricSorter []*dto.Metric
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func (s MetricSorter) Len() int {
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return len(s)
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}
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func (s MetricSorter) Swap(i, j int) {
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s[i], s[j] = s[j], s[i]
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}
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func (s MetricSorter) Less(i, j int) bool {
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if len(s[i].Label) != len(s[j].Label) {
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// This should not happen. The metrics are
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// inconsistent. However, we have to deal with the fact, as
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// people might use custom collectors or metric family injection
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// to create inconsistent metrics. So let's simply compare the
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// number of labels in this case. That will still yield
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// reproducible sorting.
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return len(s[i].Label) < len(s[j].Label)
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}
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for n, lp := range s[i].Label {
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vi := lp.GetValue()
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vj := s[j].Label[n].GetValue()
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if vi != vj {
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return vi < vj
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}
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}
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// We should never arrive here. Multiple metrics with the same
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// label set in the same scrape will lead to undefined ingestion
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// behavior. However, as above, we have to provide stable sorting
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// here, even for inconsistent metrics. So sort equal metrics
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// by their timestamp, with missing timestamps (implying "now")
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// coming last.
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if s[i].TimestampMs == nil {
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return false
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}
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if s[j].TimestampMs == nil {
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return true
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}
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return s[i].GetTimestampMs() < s[j].GetTimestampMs()
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}
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// NormalizeMetricFamilies returns a MetricFamily slice with empty
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// MetricFamilies pruned and the remaining MetricFamilies sorted by name within
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// the slice, with the contained Metrics sorted within each MetricFamily.
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func NormalizeMetricFamilies(metricFamiliesByName map[string]*dto.MetricFamily) []*dto.MetricFamily {
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for _, mf := range metricFamiliesByName {
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sort.Sort(MetricSorter(mf.Metric))
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}
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names := make([]string, 0, len(metricFamiliesByName))
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for name, mf := range metricFamiliesByName {
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if len(mf.Metric) > 0 {
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names = append(names, name)
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}
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}
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sort.Strings(names)
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result := make([]*dto.MetricFamily, 0, len(names))
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for _, name := range names {
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result = append(result, metricFamiliesByName[name])
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}
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return result
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}
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