Merge pull request #739 from RainbowMango/pr_porting_promlint
Porting promlint from prometheus/prometheus
This commit is contained in:
Björn Rabenstein
GitHub
commit
a3a59237d1
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// 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 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 promlint provides a linter for Prometheus metrics.
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package promlint
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import (
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"fmt"
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"io"
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"regexp"
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"sort"
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"strings"
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"github.com/prometheus/common/expfmt"
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dto "github.com/prometheus/client_model/go"
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)
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// A Linter is a Prometheus metrics linter. It identifies issues with metric
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// names, types, and metadata, and reports them to the caller.
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type Linter struct {
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r io.Reader
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}
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// A Problem is an issue detected by a Linter.
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type Problem struct {
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// The name of the metric indicated by this Problem.
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Metric string
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// A description of the issue for this Problem.
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Text string
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}
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// newProblem is helper function to create a Problem.
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func newProblem(mf dto.MetricFamily, text string) Problem {
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return Problem{
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Metric: mf.GetName(),
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Text: text,
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}
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}
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// New creates a new Linter that reads an input stream of Prometheus metrics.
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// Only the Prometheus text exposition format is supported.
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func New(r io.Reader) *Linter {
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return &Linter{
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r: r,
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}
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}
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// Lint performs a linting pass, returning a slice of Problems indicating any
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// issues found in the metrics stream. The slice is sorted by metric name
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// and issue description.
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func (l *Linter) Lint() ([]Problem, error) {
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// TODO(mdlayher): support for protobuf exposition format?
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d := expfmt.NewDecoder(l.r, expfmt.FmtText)
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var problems []Problem
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var mf dto.MetricFamily
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for {
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if err := d.Decode(&mf); err != nil {
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if err == io.EOF {
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break
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}
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return nil, err
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}
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problems = append(problems, lint(mf)...)
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}
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// Ensure deterministic output.
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sort.SliceStable(problems, func(i, j int) bool {
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if problems[i].Metric == problems[j].Metric {
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return problems[i].Text < problems[j].Text
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}
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return problems[i].Metric < problems[j].Metric
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})
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return problems, nil
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}
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// lint is the entry point for linting a single metric.
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func lint(mf dto.MetricFamily) []Problem {
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fns := []func(mf dto.MetricFamily) []Problem{
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lintHelp,
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lintMetricUnits,
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lintCounter,
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lintHistogramSummaryReserved,
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lintMetricTypeInName,
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lintReservedChars,
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lintCamelCase,
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lintUnitAbbreviations,
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}
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var problems []Problem
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for _, fn := range fns {
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problems = append(problems, fn(mf)...)
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}
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// TODO(mdlayher): lint rules for specific metrics types.
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return problems
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}
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// lintHelp detects issues related to the help text for a metric.
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func lintHelp(mf dto.MetricFamily) []Problem {
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var problems []Problem
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// Expect all metrics to have help text available.
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if mf.Help == nil {
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problems = append(problems, newProblem(mf, "no help text"))
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}
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return problems
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}
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// lintMetricUnits detects issues with metric unit names.
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func lintMetricUnits(mf dto.MetricFamily) []Problem {
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var problems []Problem
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unit, base, ok := metricUnits(*mf.Name)
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if !ok {
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// No known units detected.
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return nil
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}
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// Unit is already a base unit.
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if unit == base {
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return nil
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}
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problems = append(problems, newProblem(mf, fmt.Sprintf("use base unit %q instead of %q", base, unit)))
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return problems
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}
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// lintCounter detects issues specific to counters, as well as patterns that should
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// only be used with counters.
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func lintCounter(mf dto.MetricFamily) []Problem {
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var problems []Problem
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isCounter := mf.GetType() == dto.MetricType_COUNTER
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isUntyped := mf.GetType() == dto.MetricType_UNTYPED
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hasTotalSuffix := strings.HasSuffix(mf.GetName(), "_total")
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switch {
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case isCounter && !hasTotalSuffix:
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problems = append(problems, newProblem(mf, `counter metrics should have "_total" suffix`))
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case !isUntyped && !isCounter && hasTotalSuffix:
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problems = append(problems, newProblem(mf, `non-counter metrics should not have "_total" suffix`))
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}
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return problems
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}
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// lintHistogramSummaryReserved detects when other types of metrics use names or labels
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// reserved for use by histograms and/or summaries.
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func lintHistogramSummaryReserved(mf dto.MetricFamily) []Problem {
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// These rules do not apply to untyped metrics.
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t := mf.GetType()
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if t == dto.MetricType_UNTYPED {
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return nil
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}
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var problems []Problem
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isHistogram := t == dto.MetricType_HISTOGRAM
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isSummary := t == dto.MetricType_SUMMARY
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n := mf.GetName()
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if !isHistogram && strings.HasSuffix(n, "_bucket") {
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problems = append(problems, newProblem(mf, `non-histogram metrics should not have "_bucket" suffix`))
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}
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if !isHistogram && !isSummary && strings.HasSuffix(n, "_count") {
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problems = append(problems, newProblem(mf, `non-histogram and non-summary metrics should not have "_count" suffix`))
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}
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if !isHistogram && !isSummary && strings.HasSuffix(n, "_sum") {
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problems = append(problems, newProblem(mf, `non-histogram and non-summary metrics should not have "_sum" suffix`))
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}
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for _, m := range mf.GetMetric() {
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for _, l := range m.GetLabel() {
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ln := l.GetName()
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if !isHistogram && ln == "le" {
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problems = append(problems, newProblem(mf, `non-histogram metrics should not have "le" label`))
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}
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if !isSummary && ln == "quantile" {
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problems = append(problems, newProblem(mf, `non-summary metrics should not have "quantile" label`))
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}
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}
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}
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return problems
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}
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// lintMetricTypeInName detects when metric types are included in the metric name.
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func lintMetricTypeInName(mf dto.MetricFamily) []Problem {
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var problems []Problem
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n := strings.ToLower(mf.GetName())
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for i, t := range dto.MetricType_name {
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if i == int32(dto.MetricType_UNTYPED) {
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continue
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}
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typename := strings.ToLower(t)
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if strings.Contains(n, "_"+typename+"_") || strings.HasSuffix(n, "_"+typename) {
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problems = append(problems, newProblem(mf, fmt.Sprintf(`metric name should not include type '%s'`, typename)))
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}
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}
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return problems
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}
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// lintReservedChars detects colons in metric names.
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func lintReservedChars(mf dto.MetricFamily) []Problem {
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var problems []Problem
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if strings.Contains(mf.GetName(), ":") {
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problems = append(problems, newProblem(mf, "metric names should not contain ':'"))
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}
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return problems
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}
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var camelCase = regexp.MustCompile(`[a-z][A-Z]`)
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// lintCamelCase detects metric names and label names written in camelCase.
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func lintCamelCase(mf dto.MetricFamily) []Problem {
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var problems []Problem
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if camelCase.FindString(mf.GetName()) != "" {
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problems = append(problems, newProblem(mf, "metric names should be written in 'snake_case' not 'camelCase'"))
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}
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for _, m := range mf.GetMetric() {
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for _, l := range m.GetLabel() {
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if camelCase.FindString(l.GetName()) != "" {
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problems = append(problems, newProblem(mf, "label names should be written in 'snake_case' not 'camelCase'"))
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}
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}
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}
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return problems
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}
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// lintUnitAbbreviations detects abbreviated units in the metric name.
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func lintUnitAbbreviations(mf dto.MetricFamily) []Problem {
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var problems []Problem
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n := strings.ToLower(mf.GetName())
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for _, s := range unitAbbreviations {
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if strings.Contains(n, "_"+s+"_") || strings.HasSuffix(n, "_"+s) {
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problems = append(problems, newProblem(mf, "metric names should not contain abbreviated units"))
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}
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}
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return problems
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}
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// metricUnits attempts to detect known unit types used as part of a metric name,
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// e.g. "foo_bytes_total" or "bar_baz_milligrams".
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func metricUnits(m string) (unit string, base string, ok bool) {
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ss := strings.Split(m, "_")
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for unit, base := range units {
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// Also check for "no prefix".
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for _, p := range append(unitPrefixes, "") {
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for _, s := range ss {
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// Attempt to explicitly match a known unit with a known prefix,
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// as some words may look like "units" when matching suffix.
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//
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// As an example, "thermometers" should not match "meters", but
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// "kilometers" should.
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if s == p+unit {
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return p + unit, base, true
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}
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}
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}
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}
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return "", "", false
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}
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// Units and their possible prefixes recognized by this library. More can be
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// added over time as needed.
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var (
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// map a unit to the appropriate base unit.
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units = map[string]string{
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// Base units.
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"amperes": "amperes",
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"bytes": "bytes",
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"celsius": "celsius", // Celsius is more common in practice than Kelvin.
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"grams": "grams",
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"joules": "joules",
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"meters": "meters", // Both American and international spelling permitted.
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"metres": "metres",
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"seconds": "seconds",
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"volts": "volts",
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// Non base units.
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// Time.
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"minutes": "seconds",
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"hours": "seconds",
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"days": "seconds",
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"weeks": "seconds",
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// Temperature.
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"kelvin": "celsius",
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"kelvins": "celsius",
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"fahrenheit": "celsius",
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"rankine": "celsius",
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// Length.
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"inches": "meters",
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"yards": "meters",
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"miles": "meters",
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// Bytes.
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"bits": "bytes",
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// Energy.
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"calories": "joules",
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// Mass.
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"pounds": "grams",
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"ounces": "grams",
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}
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unitPrefixes = []string{
|
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"pico",
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"nano",
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"micro",
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"milli",
|
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"centi",
|
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"deci",
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"deca",
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"hecto",
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"kilo",
|
||||||
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"kibi",
|
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"mega",
|
||||||
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"mibi",
|
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"giga",
|
||||||
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"gibi",
|
||||||
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"tera",
|
||||||
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"tebi",
|
||||||
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"peta",
|
||||||
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"pebi",
|
||||||
|
}
|
||||||
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|
||||||
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// Common abbreviations that we'd like to discourage.
|
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unitAbbreviations = []string{
|
||||||
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"s",
|
||||||
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"ms",
|
||||||
|
"us",
|
||||||
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"ns",
|
||||||
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"sec",
|
||||||
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"b",
|
||||||
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"kb",
|
||||||
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"mb",
|
||||||
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"gb",
|
||||||
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"tb",
|
||||||
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"pb",
|
||||||
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"m",
|
||||||
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"h",
|
||||||
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"d",
|
||||||
|
}
|
||||||
|
)
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|
@ -0,0 +1,788 @@
|
||||||
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// Copyright 2020 The Prometheus 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.
|
||||||
|
|
||||||
|
package promlint_test
|
||||||
|
|
||||||
|
import (
|
||||||
|
"fmt"
|
||||||
|
"reflect"
|
||||||
|
"strings"
|
||||||
|
"testing"
|
||||||
|
|
||||||
|
"github.com/prometheus/client_golang/prometheus/testutil/promlint"
|
||||||
|
)
|
||||||
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|
||||||
|
type test struct {
|
||||||
|
name string
|
||||||
|
in string
|
||||||
|
problems []promlint.Problem
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLintNoHelpText(t *testing.T) {
|
||||||
|
const msg = "no help text"
|
||||||
|
|
||||||
|
tests := []test{
|
||||||
|
{
|
||||||
|
name: "no help",
|
||||||
|
in: `
|
||||||
|
# TYPE go_goroutines gauge
|
||||||
|
go_goroutines 24
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "go_goroutines",
|
||||||
|
Text: msg,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "empty help",
|
||||||
|
in: `
|
||||||
|
# HELP go_goroutines
|
||||||
|
# TYPE go_goroutines gauge
|
||||||
|
go_goroutines 24
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "go_goroutines",
|
||||||
|
Text: msg,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "no help and empty help",
|
||||||
|
in: `
|
||||||
|
# HELP go_goroutines
|
||||||
|
# TYPE go_goroutines gauge
|
||||||
|
go_goroutines 24
|
||||||
|
# TYPE go_threads gauge
|
||||||
|
go_threads 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{
|
||||||
|
{
|
||||||
|
Metric: "go_goroutines",
|
||||||
|
Text: msg,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
Metric: "go_threads",
|
||||||
|
Text: msg,
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "OK",
|
||||||
|
in: `
|
||||||
|
# HELP go_goroutines Number of goroutines that currently exist.
|
||||||
|
# TYPE go_goroutines gauge
|
||||||
|
go_goroutines 24
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
}
|
||||||
|
runTests(t, tests)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLintMetricUnits(t *testing.T) {
|
||||||
|
tests := []struct {
|
||||||
|
name string
|
||||||
|
in string
|
||||||
|
problems []promlint.Problem
|
||||||
|
}{
|
||||||
|
// good cases.
|
||||||
|
{
|
||||||
|
name: "amperes",
|
||||||
|
in: `
|
||||||
|
# HELP x_amperes Test metric.
|
||||||
|
# TYPE x_amperes untyped
|
||||||
|
x_amperes 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "bytes",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes Test metric.
|
||||||
|
# TYPE x_bytes untyped
|
||||||
|
x_bytes 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "grams",
|
||||||
|
in: `
|
||||||
|
# HELP x_grams Test metric.
|
||||||
|
# TYPE x_grams untyped
|
||||||
|
x_grams 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "celsius",
|
||||||
|
in: `
|
||||||
|
# HELP x_celsius Test metric.
|
||||||
|
# TYPE x_celsius untyped
|
||||||
|
x_celsius 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "meters",
|
||||||
|
in: `
|
||||||
|
# HELP x_meters Test metric.
|
||||||
|
# TYPE x_meters untyped
|
||||||
|
x_meters 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "metres",
|
||||||
|
in: `
|
||||||
|
# HELP x_metres Test metric.
|
||||||
|
# TYPE x_metres untyped
|
||||||
|
x_metres 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "moles",
|
||||||
|
in: `
|
||||||
|
# HELP x_moles Test metric.
|
||||||
|
# TYPE x_moles untyped
|
||||||
|
x_moles 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "seconds",
|
||||||
|
in: `
|
||||||
|
# HELP x_seconds Test metric.
|
||||||
|
# TYPE x_seconds untyped
|
||||||
|
x_seconds 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "joules",
|
||||||
|
in: `
|
||||||
|
# HELP x_joules Test metric.
|
||||||
|
# TYPE x_joules untyped
|
||||||
|
x_joules 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
// bad cases.
|
||||||
|
{
|
||||||
|
name: "milliamperes",
|
||||||
|
in: `
|
||||||
|
# HELP x_milliamperes Test metric.
|
||||||
|
# TYPE x_milliamperes untyped
|
||||||
|
x_milliamperes 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_milliamperes",
|
||||||
|
Text: `use base unit "amperes" instead of "milliamperes"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "gigabytes",
|
||||||
|
in: `
|
||||||
|
# HELP x_gigabytes Test metric.
|
||||||
|
# TYPE x_gigabytes untyped
|
||||||
|
x_gigabytes 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_gigabytes",
|
||||||
|
Text: `use base unit "bytes" instead of "gigabytes"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "kilograms",
|
||||||
|
in: `
|
||||||
|
# HELP x_kilograms Test metric.
|
||||||
|
# TYPE x_kilograms untyped
|
||||||
|
x_kilograms 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_kilograms",
|
||||||
|
Text: `use base unit "grams" instead of "kilograms"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "nanocelsius",
|
||||||
|
in: `
|
||||||
|
# HELP x_nanocelsius Test metric.
|
||||||
|
# TYPE x_nanocelsius untyped
|
||||||
|
x_nanocelsius 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_nanocelsius",
|
||||||
|
Text: `use base unit "celsius" instead of "nanocelsius"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "kilometers",
|
||||||
|
in: `
|
||||||
|
# HELP x_kilometers Test metric.
|
||||||
|
# TYPE x_kilometers untyped
|
||||||
|
x_kilometers 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_kilometers",
|
||||||
|
Text: `use base unit "meters" instead of "kilometers"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "picometers",
|
||||||
|
in: `
|
||||||
|
# HELP x_picometers Test metric.
|
||||||
|
# TYPE x_picometers untyped
|
||||||
|
x_picometers 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_picometers",
|
||||||
|
Text: `use base unit "meters" instead of "picometers"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "microseconds",
|
||||||
|
in: `
|
||||||
|
# HELP x_microseconds Test metric.
|
||||||
|
# TYPE x_microseconds untyped
|
||||||
|
x_microseconds 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_microseconds",
|
||||||
|
Text: `use base unit "seconds" instead of "microseconds"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "minutes",
|
||||||
|
in: `
|
||||||
|
# HELP x_minutes Test metric.
|
||||||
|
# TYPE x_minutes untyped
|
||||||
|
x_minutes 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_minutes",
|
||||||
|
Text: `use base unit "seconds" instead of "minutes"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "hours",
|
||||||
|
in: `
|
||||||
|
# HELP x_hours Test metric.
|
||||||
|
# TYPE x_hours untyped
|
||||||
|
x_hours 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_hours",
|
||||||
|
Text: `use base unit "seconds" instead of "hours"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "days",
|
||||||
|
in: `
|
||||||
|
# HELP x_days Test metric.
|
||||||
|
# TYPE x_days untyped
|
||||||
|
x_days 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_days",
|
||||||
|
Text: `use base unit "seconds" instead of "days"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "kelvin",
|
||||||
|
in: `
|
||||||
|
# HELP x_kelvin Test metric.
|
||||||
|
# TYPE x_kelvin untyped
|
||||||
|
x_kelvin 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_kelvin",
|
||||||
|
Text: `use base unit "celsius" instead of "kelvin"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "kelvins",
|
||||||
|
in: `
|
||||||
|
# HELP x_kelvins Test metric.
|
||||||
|
# TYPE x_kelvins untyped
|
||||||
|
x_kelvins 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_kelvins",
|
||||||
|
Text: `use base unit "celsius" instead of "kelvins"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "fahrenheit",
|
||||||
|
in: `
|
||||||
|
# HELP thermometers_fahrenheit Test metric.
|
||||||
|
# TYPE thermometers_fahrenheit untyped
|
||||||
|
thermometers_fahrenheit 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "thermometers_fahrenheit",
|
||||||
|
Text: `use base unit "celsius" instead of "fahrenheit"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "rankine",
|
||||||
|
in: `
|
||||||
|
# HELP thermometers_rankine Test metric.
|
||||||
|
# TYPE thermometers_rankine untyped
|
||||||
|
thermometers_rankine 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "thermometers_rankine",
|
||||||
|
Text: `use base unit "celsius" instead of "rankine"`,
|
||||||
|
}},
|
||||||
|
}, {
|
||||||
|
name: "inches",
|
||||||
|
in: `
|
||||||
|
# HELP x_inches Test metric.
|
||||||
|
# TYPE x_inches untyped
|
||||||
|
x_inches 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_inches",
|
||||||
|
Text: `use base unit "meters" instead of "inches"`,
|
||||||
|
}},
|
||||||
|
}, {
|
||||||
|
name: "yards",
|
||||||
|
in: `
|
||||||
|
# HELP x_yards Test metric.
|
||||||
|
# TYPE x_yards untyped
|
||||||
|
x_yards 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_yards",
|
||||||
|
Text: `use base unit "meters" instead of "yards"`,
|
||||||
|
}},
|
||||||
|
}, {
|
||||||
|
name: "miles",
|
||||||
|
in: `
|
||||||
|
# HELP x_miles Test metric.
|
||||||
|
# TYPE x_miles untyped
|
||||||
|
x_miles 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_miles",
|
||||||
|
Text: `use base unit "meters" instead of "miles"`,
|
||||||
|
}},
|
||||||
|
}, {
|
||||||
|
name: "bits",
|
||||||
|
in: `
|
||||||
|
# HELP x_bits Test metric.
|
||||||
|
# TYPE x_bits untyped
|
||||||
|
x_bits 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_bits",
|
||||||
|
Text: `use base unit "bytes" instead of "bits"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "calories",
|
||||||
|
in: `
|
||||||
|
# HELP x_calories Test metric.
|
||||||
|
# TYPE x_calories untyped
|
||||||
|
x_calories 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_calories",
|
||||||
|
Text: `use base unit "joules" instead of "calories"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "pounds",
|
||||||
|
in: `
|
||||||
|
# HELP x_pounds Test metric.
|
||||||
|
# TYPE x_pounds untyped
|
||||||
|
x_pounds 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_pounds",
|
||||||
|
Text: `use base unit "grams" instead of "pounds"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "ounces",
|
||||||
|
in: `
|
||||||
|
# HELP x_ounces Test metric.
|
||||||
|
# TYPE x_ounces untyped
|
||||||
|
x_ounces 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_ounces",
|
||||||
|
Text: `use base unit "grams" instead of "ounces"`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
for _, tt := range tests {
|
||||||
|
t.Run(tt.name, func(t *testing.T) {
|
||||||
|
l := promlint.New(strings.NewReader(tt.in))
|
||||||
|
|
||||||
|
problems, err := l.Lint()
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("unexpected error: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
if want, got := tt.problems, problems; !reflect.DeepEqual(want, got) {
|
||||||
|
t.Fatalf("unexpected problems:\n- want: %v\n- got: %v",
|
||||||
|
want, got)
|
||||||
|
}
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLintCounter(t *testing.T) {
|
||||||
|
tests := []test{
|
||||||
|
{
|
||||||
|
name: "counter without _total suffix",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes Test metric.
|
||||||
|
# TYPE x_bytes counter
|
||||||
|
x_bytes 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_bytes",
|
||||||
|
Text: `counter metrics should have "_total" suffix`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "gauge with _total suffix",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes_total Test metric.
|
||||||
|
# TYPE x_bytes_total gauge
|
||||||
|
x_bytes_total 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_bytes_total",
|
||||||
|
Text: `non-counter metrics should not have "_total" suffix`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "counter with _total suffix",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes_total Test metric.
|
||||||
|
# TYPE x_bytes_total counter
|
||||||
|
x_bytes_total 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "gauge without _total suffix",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes Test metric.
|
||||||
|
# TYPE x_bytes gauge
|
||||||
|
x_bytes 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "untyped with _total suffix",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes_total Test metric.
|
||||||
|
# TYPE x_bytes_total untyped
|
||||||
|
x_bytes_total 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "untyped without _total suffix",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes Test metric.
|
||||||
|
# TYPE x_bytes untyped
|
||||||
|
x_bytes 10
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
runTests(t, tests)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLintHistogramSummaryReserved(t *testing.T) {
|
||||||
|
tests := []test{
|
||||||
|
{
|
||||||
|
name: "gauge with _bucket suffix",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes_bucket Test metric.
|
||||||
|
# TYPE x_bytes_bucket gauge
|
||||||
|
x_bytes_bucket 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_bytes_bucket",
|
||||||
|
Text: `non-histogram metrics should not have "_bucket" suffix`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "gauge with _count suffix",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes_count Test metric.
|
||||||
|
# TYPE x_bytes_count gauge
|
||||||
|
x_bytes_count 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_bytes_count",
|
||||||
|
Text: `non-histogram and non-summary metrics should not have "_count" suffix`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "gauge with _sum suffix",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes_sum Test metric.
|
||||||
|
# TYPE x_bytes_sum gauge
|
||||||
|
x_bytes_sum 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_bytes_sum",
|
||||||
|
Text: `non-histogram and non-summary metrics should not have "_sum" suffix`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "gauge with le label",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes Test metric.
|
||||||
|
# TYPE x_bytes gauge
|
||||||
|
x_bytes{le="1"} 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_bytes",
|
||||||
|
Text: `non-histogram metrics should not have "le" label`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "gauge with quantile label",
|
||||||
|
in: `
|
||||||
|
# HELP x_bytes Test metric.
|
||||||
|
# TYPE x_bytes gauge
|
||||||
|
x_bytes{quantile="1"} 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "x_bytes",
|
||||||
|
Text: `non-summary metrics should not have "quantile" label`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "histogram with quantile label",
|
||||||
|
in: `
|
||||||
|
# HELP tsdb_compaction_duration Duration of compaction runs.
|
||||||
|
# TYPE tsdb_compaction_duration histogram
|
||||||
|
tsdb_compaction_duration_bucket{le="0.005",quantile="0.01"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.01",quantile="0.01"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.025",quantile="0.01"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.05",quantile="0.01"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.1",quantile="0.01"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.25",quantile="0.01"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.5",quantile="0.01"} 57
|
||||||
|
tsdb_compaction_duration_bucket{le="1",quantile="0.01"} 68
|
||||||
|
tsdb_compaction_duration_bucket{le="2.5",quantile="0.01"} 69
|
||||||
|
tsdb_compaction_duration_bucket{le="5",quantile="0.01"} 69
|
||||||
|
tsdb_compaction_duration_bucket{le="10",quantile="0.01"} 69
|
||||||
|
tsdb_compaction_duration_bucket{le="+Inf",quantile="0.01"} 69
|
||||||
|
tsdb_compaction_duration_sum 28.740810936000006
|
||||||
|
tsdb_compaction_duration_count 69
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "tsdb_compaction_duration",
|
||||||
|
Text: `non-summary metrics should not have "quantile" label`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "summary with le label",
|
||||||
|
in: `
|
||||||
|
# HELP go_gc_duration_seconds A summary of the GC invocation durations.
|
||||||
|
# TYPE go_gc_duration_seconds summary
|
||||||
|
go_gc_duration_seconds{quantile="0",le="0.01"} 4.2365e-05
|
||||||
|
go_gc_duration_seconds{quantile="0.25",le="0.01"} 8.1492e-05
|
||||||
|
go_gc_duration_seconds{quantile="0.5",le="0.01"} 0.000100656
|
||||||
|
go_gc_duration_seconds{quantile="0.75",le="0.01"} 0.000113913
|
||||||
|
go_gc_duration_seconds{quantile="1",le="0.01"} 0.021754305
|
||||||
|
go_gc_duration_seconds_sum 1.769429004
|
||||||
|
go_gc_duration_seconds_count 5962
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{{
|
||||||
|
Metric: "go_gc_duration_seconds",
|
||||||
|
Text: `non-histogram metrics should not have "le" label`,
|
||||||
|
}},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "histogram OK",
|
||||||
|
in: `
|
||||||
|
# HELP tsdb_compaction_duration Duration of compaction runs.
|
||||||
|
# TYPE tsdb_compaction_duration histogram
|
||||||
|
tsdb_compaction_duration_bucket{le="0.005"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.01"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.025"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.05"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.1"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.25"} 0
|
||||||
|
tsdb_compaction_duration_bucket{le="0.5"} 57
|
||||||
|
tsdb_compaction_duration_bucket{le="1"} 68
|
||||||
|
tsdb_compaction_duration_bucket{le="2.5"} 69
|
||||||
|
tsdb_compaction_duration_bucket{le="5"} 69
|
||||||
|
tsdb_compaction_duration_bucket{le="10"} 69
|
||||||
|
tsdb_compaction_duration_bucket{le="+Inf"} 69
|
||||||
|
tsdb_compaction_duration_sum 28.740810936000006
|
||||||
|
tsdb_compaction_duration_count 69
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "summary OK",
|
||||||
|
in: `
|
||||||
|
# HELP go_gc_duration_seconds A summary of the GC invocation durations.
|
||||||
|
# TYPE go_gc_duration_seconds summary
|
||||||
|
go_gc_duration_seconds{quantile="0"} 4.2365e-05
|
||||||
|
go_gc_duration_seconds{quantile="0.25"} 8.1492e-05
|
||||||
|
go_gc_duration_seconds{quantile="0.5"} 0.000100656
|
||||||
|
go_gc_duration_seconds{quantile="0.75"} 0.000113913
|
||||||
|
go_gc_duration_seconds{quantile="1"} 0.021754305
|
||||||
|
go_gc_duration_seconds_sum 1.769429004
|
||||||
|
go_gc_duration_seconds_count 5962
|
||||||
|
`,
|
||||||
|
},
|
||||||
|
}
|
||||||
|
runTests(t, tests)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLintMetricTypeInName(t *testing.T) {
|
||||||
|
genTest := func(n, t, err string, problems ...promlint.Problem) test {
|
||||||
|
return test{
|
||||||
|
name: fmt.Sprintf("%s with _%s suffix", t, t),
|
||||||
|
in: fmt.Sprintf(`
|
||||||
|
# HELP %s Test metric.
|
||||||
|
# TYPE %s %s
|
||||||
|
%s 10
|
||||||
|
`, n, n, t, n),
|
||||||
|
problems: append(problems, promlint.Problem{
|
||||||
|
Metric: n,
|
||||||
|
Text: fmt.Sprintf(`metric name should not include type '%s'`, err),
|
||||||
|
}),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
twoProbTest := genTest("http_requests_counter", "counter", "counter", promlint.Problem{
|
||||||
|
Metric: "http_requests_counter",
|
||||||
|
Text: `counter metrics should have "_total" suffix`,
|
||||||
|
})
|
||||||
|
|
||||||
|
tests := []test{
|
||||||
|
twoProbTest,
|
||||||
|
genTest("instance_memory_limit_bytes_gauge", "gauge", "gauge"),
|
||||||
|
genTest("request_duration_seconds_summary", "summary", "summary"),
|
||||||
|
genTest("request_duration_seconds_summary", "histogram", "summary"),
|
||||||
|
genTest("request_duration_seconds_histogram", "histogram", "histogram"),
|
||||||
|
genTest("request_duration_seconds_HISTOGRAM", "histogram", "histogram"),
|
||||||
|
|
||||||
|
genTest("instance_memory_limit_gauge_bytes", "gauge", "gauge"),
|
||||||
|
}
|
||||||
|
runTests(t, tests)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLintReservedChars(t *testing.T) {
|
||||||
|
tests := []test{
|
||||||
|
{
|
||||||
|
name: "request_duration::_seconds",
|
||||||
|
in: `
|
||||||
|
# HELP request_duration::_seconds Test metric.
|
||||||
|
# TYPE request_duration::_seconds histogram
|
||||||
|
request_duration::_seconds 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{
|
||||||
|
{
|
||||||
|
Metric: "request_duration::_seconds",
|
||||||
|
Text: "metric names should not contain ':'",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
}
|
||||||
|
runTests(t, tests)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLintCamelCase(t *testing.T) {
|
||||||
|
tests := []test{
|
||||||
|
{
|
||||||
|
name: "requestDuration_seconds",
|
||||||
|
in: `
|
||||||
|
# HELP requestDuration_seconds Test metric.
|
||||||
|
# TYPE requestDuration_seconds histogram
|
||||||
|
requestDuration_seconds 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{
|
||||||
|
{
|
||||||
|
Metric: "requestDuration_seconds",
|
||||||
|
Text: "metric names should be written in 'snake_case' not 'camelCase'",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "request_duration_seconds",
|
||||||
|
in: `
|
||||||
|
# HELP request_duration_seconds Test metric.
|
||||||
|
# TYPE request_duration_seconds histogram
|
||||||
|
request_duration_seconds{httpService="foo"} 10
|
||||||
|
`,
|
||||||
|
problems: []promlint.Problem{
|
||||||
|
{
|
||||||
|
Metric: "request_duration_seconds",
|
||||||
|
Text: "label names should be written in 'snake_case' not 'camelCase'",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
},
|
||||||
|
}
|
||||||
|
runTests(t, tests)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLintUnitAbbreviations(t *testing.T) {
|
||||||
|
genTest := func(n string) test {
|
||||||
|
return test{
|
||||||
|
name: fmt.Sprintf("%s with abbreviated unit", n),
|
||||||
|
in: fmt.Sprintf(`
|
||||||
|
# HELP %s Test metric.
|
||||||
|
# TYPE %s gauge
|
||||||
|
%s 10
|
||||||
|
`, n, n, n),
|
||||||
|
problems: []promlint.Problem{
|
||||||
|
{
|
||||||
|
Metric: n,
|
||||||
|
Text: "metric names should not contain abbreviated units",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
tests := []test{
|
||||||
|
genTest("instance_memory_limit_b"),
|
||||||
|
genTest("instance_memory_limit_kb"),
|
||||||
|
genTest("instance_memory_limit_mb"),
|
||||||
|
genTest("instance_memory_limit_MB"),
|
||||||
|
genTest("instance_memory_limit_gb"),
|
||||||
|
genTest("instance_memory_limit_tb"),
|
||||||
|
genTest("instance_memory_limit_pb"),
|
||||||
|
|
||||||
|
genTest("request_duration_s"),
|
||||||
|
genTest("request_duration_ms"),
|
||||||
|
genTest("request_duration_us"),
|
||||||
|
genTest("request_duration_ns"),
|
||||||
|
genTest("request_duration_sec"),
|
||||||
|
genTest("request_sec_duration"),
|
||||||
|
genTest("request_duration_m"),
|
||||||
|
genTest("request_duration_h"),
|
||||||
|
genTest("request_duration_d"),
|
||||||
|
}
|
||||||
|
runTests(t, tests)
|
||||||
|
}
|
||||||
|
|
||||||
|
func runTests(t *testing.T, tests []test) {
|
||||||
|
t.Helper()
|
||||||
|
for _, tt := range tests {
|
||||||
|
t.Run(tt.name, func(t *testing.T) {
|
||||||
|
l := promlint.New(strings.NewReader(tt.in))
|
||||||
|
|
||||||
|
problems, err := l.Lint()
|
||||||
|
if err != nil {
|
||||||
|
t.Fatalf("unexpected error: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
if want, got := tt.problems, problems; !reflect.DeepEqual(want, got) {
|
||||||
|
t.Fatalf("unexpected problems:\n- want: %v\n- got: %v",
|
||||||
|
want, got)
|
||||||
|
}
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue