Porting promlint from prometheus/prometheus.
Signed-off-by: RainbowMango <renhongcai@huawei.com>
This commit is contained in:
RainbowMango
parent
efb148ca4d
commit
3c5e60edc1
|
|
@ -0,0 +1,372 @@
|
|||
// Copyright 2017 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 provides a linter for Prometheus metrics.
|
||||
package promlint
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
"regexp"
|
||||
"sort"
|
||||
"strings"
|
||||
|
||||
dto "github.com/prometheus/client_model/go"
|
||||
"github.com/prometheus/common/expfmt"
|
||||
)
|
||||
|
||||
// A Linter is a Prometheus metrics linter. It identifies issues with metric
|
||||
// names, types, and metadata, and reports them to the caller.
|
||||
type Linter struct {
|
||||
r io.Reader
|
||||
}
|
||||
|
||||
// A Problem is an issue detected by a Linter.
|
||||
type Problem struct {
|
||||
// The name of the metric indicated by this Problem.
|
||||
Metric string
|
||||
|
||||
// A description of the issue for this Problem.
|
||||
Text string
|
||||
}
|
||||
|
||||
// problems is a slice of Problems with a helper method to easily append
|
||||
// additional Problems to the slice.
|
||||
type problems []Problem
|
||||
|
||||
// Add appends a new Problem to the slice for the specified metric, with
|
||||
// the specified issue text.
|
||||
func (p *problems) Add(mf dto.MetricFamily, text string) {
|
||||
*p = append(*p, Problem{
|
||||
Metric: mf.GetName(),
|
||||
Text: text,
|
||||
})
|
||||
}
|
||||
|
||||
// New creates a new Linter that reads an input stream of Prometheus metrics.
|
||||
// Only the text exposition format is supported.
|
||||
func New(r io.Reader) *Linter {
|
||||
return &Linter{
|
||||
r: r,
|
||||
}
|
||||
}
|
||||
|
||||
// Lint performs a linting pass, returning a slice of Problems indicating any
|
||||
// issues found in the metrics stream. The slice is sorted by metric name
|
||||
// and issue description.
|
||||
func (l *Linter) Lint() ([]Problem, error) {
|
||||
// TODO(mdlayher): support for protobuf exposition format?
|
||||
d := expfmt.NewDecoder(l.r, expfmt.FmtText)
|
||||
|
||||
var problems []Problem
|
||||
|
||||
var mf dto.MetricFamily
|
||||
for {
|
||||
if err := d.Decode(&mf); err != nil {
|
||||
if err == io.EOF {
|
||||
break
|
||||
}
|
||||
|
||||
return nil, err
|
||||
}
|
||||
|
||||
problems = append(problems, lint(mf)...)
|
||||
}
|
||||
|
||||
// Ensure deterministic output.
|
||||
sort.SliceStable(problems, func(i, j int) bool {
|
||||
if problems[i].Metric == problems[j].Metric {
|
||||
return problems[i].Text < problems[j].Text
|
||||
}
|
||||
return problems[i].Metric < problems[j].Metric
|
||||
})
|
||||
|
||||
return problems, nil
|
||||
}
|
||||
|
||||
// lint is the entry point for linting a single metric.
|
||||
func lint(mf dto.MetricFamily) []Problem {
|
||||
fns := []func(mf dto.MetricFamily) []Problem{
|
||||
lintHelp,
|
||||
lintMetricUnits,
|
||||
lintCounter,
|
||||
lintHistogramSummaryReserved,
|
||||
lintMetricTypeInName,
|
||||
lintReservedChars,
|
||||
lintCamelCase,
|
||||
lintUnitAbbreviations,
|
||||
}
|
||||
|
||||
var problems []Problem
|
||||
for _, fn := range fns {
|
||||
problems = append(problems, fn(mf)...)
|
||||
}
|
||||
|
||||
// TODO(mdlayher): lint rules for specific metrics types.
|
||||
return problems
|
||||
}
|
||||
|
||||
// lintHelp detects issues related to the help text for a metric.
|
||||
func lintHelp(mf dto.MetricFamily) []Problem {
|
||||
var problems problems
|
||||
|
||||
// Expect all metrics to have help text available.
|
||||
if mf.Help == nil {
|
||||
problems.Add(mf, "no help text")
|
||||
}
|
||||
|
||||
return problems
|
||||
}
|
||||
|
||||
// lintMetricUnits detects issues with metric unit names.
|
||||
func lintMetricUnits(mf dto.MetricFamily) []Problem {
|
||||
var problems problems
|
||||
|
||||
unit, base, ok := metricUnits(*mf.Name)
|
||||
if !ok {
|
||||
// No known units detected.
|
||||
return nil
|
||||
}
|
||||
|
||||
// Unit is already a base unit.
|
||||
if unit == base {
|
||||
return nil
|
||||
}
|
||||
|
||||
problems.Add(mf, fmt.Sprintf("use base unit %q instead of %q", base, unit))
|
||||
|
||||
return problems
|
||||
}
|
||||
|
||||
// lintCounter detects issues specific to counters, as well as patterns that should
|
||||
// only be used with counters.
|
||||
func lintCounter(mf dto.MetricFamily) []Problem {
|
||||
var problems problems
|
||||
|
||||
isCounter := mf.GetType() == dto.MetricType_COUNTER
|
||||
isUntyped := mf.GetType() == dto.MetricType_UNTYPED
|
||||
hasTotalSuffix := strings.HasSuffix(mf.GetName(), "_total")
|
||||
|
||||
switch {
|
||||
case isCounter && !hasTotalSuffix:
|
||||
problems.Add(mf, `counter metrics should have "_total" suffix`)
|
||||
case !isUntyped && !isCounter && hasTotalSuffix:
|
||||
problems.Add(mf, `non-counter metrics should not have "_total" suffix`)
|
||||
}
|
||||
|
||||
return problems
|
||||
}
|
||||
|
||||
// lintHistogramSummaryReserved detects when other types of metrics use names or labels
|
||||
// reserved for use by histograms and/or summaries.
|
||||
func lintHistogramSummaryReserved(mf dto.MetricFamily) []Problem {
|
||||
// These rules do not apply to untyped metrics.
|
||||
t := mf.GetType()
|
||||
if t == dto.MetricType_UNTYPED {
|
||||
return nil
|
||||
}
|
||||
|
||||
var problems problems
|
||||
|
||||
isHistogram := t == dto.MetricType_HISTOGRAM
|
||||
isSummary := t == dto.MetricType_SUMMARY
|
||||
|
||||
n := mf.GetName()
|
||||
|
||||
if !isHistogram && strings.HasSuffix(n, "_bucket") {
|
||||
problems.Add(mf, `non-histogram metrics should not have "_bucket" suffix`)
|
||||
}
|
||||
if !isHistogram && !isSummary && strings.HasSuffix(n, "_count") {
|
||||
problems.Add(mf, `non-histogram and non-summary metrics should not have "_count" suffix`)
|
||||
}
|
||||
if !isHistogram && !isSummary && strings.HasSuffix(n, "_sum") {
|
||||
problems.Add(mf, `non-histogram and non-summary metrics should not have "_sum" suffix`)
|
||||
}
|
||||
|
||||
for _, m := range mf.GetMetric() {
|
||||
for _, l := range m.GetLabel() {
|
||||
ln := l.GetName()
|
||||
|
||||
if !isHistogram && ln == "le" {
|
||||
problems.Add(mf, `non-histogram metrics should not have "le" label`)
|
||||
}
|
||||
if !isSummary && ln == "quantile" {
|
||||
problems.Add(mf, `non-summary metrics should not have "quantile" label`)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return problems
|
||||
}
|
||||
|
||||
// lintMetricTypeInName detects when metric types are included in the metric name.
|
||||
func lintMetricTypeInName(mf dto.MetricFamily) []Problem {
|
||||
var problems problems
|
||||
n := strings.ToLower(mf.GetName())
|
||||
|
||||
for i, t := range dto.MetricType_name {
|
||||
if i == int32(dto.MetricType_UNTYPED) {
|
||||
continue
|
||||
}
|
||||
|
||||
typename := strings.ToLower(t)
|
||||
if strings.Contains(n, "_"+typename+"_") || strings.HasSuffix(n, "_"+typename) {
|
||||
problems.Add(mf, fmt.Sprintf(`metric name should not include type '%s'`, typename))
|
||||
}
|
||||
}
|
||||
return problems
|
||||
}
|
||||
|
||||
// lintReservedChars detects colons in metric names.
|
||||
func lintReservedChars(mf dto.MetricFamily) []Problem {
|
||||
var problems problems
|
||||
if strings.Contains(mf.GetName(), ":") {
|
||||
problems.Add(mf, "metric names should not contain ':'")
|
||||
}
|
||||
return problems
|
||||
}
|
||||
|
||||
var camelCase = regexp.MustCompile(`[a-z][A-Z]`)
|
||||
|
||||
// lintCamelCase detects metric names and label names written in camelCase.
|
||||
func lintCamelCase(mf dto.MetricFamily) []Problem {
|
||||
var problems problems
|
||||
if camelCase.FindString(mf.GetName()) != "" {
|
||||
problems.Add(mf, "metric names should be written in 'snake_case' not 'camelCase'")
|
||||
}
|
||||
|
||||
for _, m := range mf.GetMetric() {
|
||||
for _, l := range m.GetLabel() {
|
||||
if camelCase.FindString(l.GetName()) != "" {
|
||||
problems.Add(mf, "label names should be written in 'snake_case' not 'camelCase'")
|
||||
}
|
||||
}
|
||||
}
|
||||
return problems
|
||||
}
|
||||
|
||||
// lintUnitAbbreviations detects abbreviated units in the metric name.
|
||||
func lintUnitAbbreviations(mf dto.MetricFamily) []Problem {
|
||||
var problems problems
|
||||
n := strings.ToLower(mf.GetName())
|
||||
for _, s := range unitAbbreviations {
|
||||
if strings.Contains(n, "_"+s+"_") || strings.HasSuffix(n, "_"+s) {
|
||||
problems.Add(mf, "metric names should not contain abbreviated units")
|
||||
}
|
||||
}
|
||||
return problems
|
||||
}
|
||||
|
||||
// metricUnits attempts to detect known unit types used as part of a metric name,
|
||||
// e.g. "foo_bytes_total" or "bar_baz_milligrams".
|
||||
func metricUnits(m string) (unit string, base string, ok bool) {
|
||||
ss := strings.Split(m, "_")
|
||||
|
||||
for unit, base := range units {
|
||||
// Also check for "no prefix".
|
||||
for _, p := range append(unitPrefixes, "") {
|
||||
for _, s := range ss {
|
||||
// Attempt to explicitly match a known unit with a known prefix,
|
||||
// as some words may look like "units" when matching suffix.
|
||||
//
|
||||
// As an example, "thermometers" should not match "meters", but
|
||||
// "kilometers" should.
|
||||
if s == p+unit {
|
||||
return p + unit, base, true
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return "", "", false
|
||||
}
|
||||
|
||||
// Units and their possible prefixes recognized by this library. More can be
|
||||
// added over time as needed.
|
||||
var (
|
||||
// map a unit to the appropriate base unit.
|
||||
units = map[string]string{
|
||||
// Base units.
|
||||
"amperes": "amperes",
|
||||
"bytes": "bytes",
|
||||
"celsius": "celsius", // Celsius is more common in practice than Kelvin.
|
||||
"grams": "grams",
|
||||
"joules": "joules",
|
||||
"meters": "meters", // Both American and international spelling permitted.
|
||||
"metres": "metres",
|
||||
"seconds": "seconds",
|
||||
"volts": "volts",
|
||||
|
||||
// Non base units.
|
||||
// Time.
|
||||
"minutes": "seconds",
|
||||
"hours": "seconds",
|
||||
"days": "seconds",
|
||||
"weeks": "seconds",
|
||||
// Temperature.
|
||||
"kelvin": "celsius",
|
||||
"kelvins": "celsius",
|
||||
"fahrenheit": "celsius",
|
||||
"rankine": "celsius",
|
||||
// Length.
|
||||
"inches": "meters",
|
||||
"yards": "meters",
|
||||
"miles": "meters",
|
||||
// Bytes.
|
||||
"bits": "bytes",
|
||||
// Energy.
|
||||
"calories": "joules",
|
||||
// Mass.
|
||||
"pounds": "grams",
|
||||
"ounces": "grams",
|
||||
}
|
||||
|
||||
unitPrefixes = []string{
|
||||
"pico",
|
||||
"nano",
|
||||
"micro",
|
||||
"milli",
|
||||
"centi",
|
||||
"deci",
|
||||
"deca",
|
||||
"hecto",
|
||||
"kilo",
|
||||
"kibi",
|
||||
"mega",
|
||||
"mibi",
|
||||
"giga",
|
||||
"gibi",
|
||||
"tera",
|
||||
"tebi",
|
||||
"peta",
|
||||
"pebi",
|
||||
}
|
||||
|
||||
// Common abbreviations that we'd like to discourage.
|
||||
unitAbbreviations = []string{
|
||||
"s",
|
||||
"ms",
|
||||
"us",
|
||||
"ns",
|
||||
"sec",
|
||||
"b",
|
||||
"kb",
|
||||
"mb",
|
||||
"gb",
|
||||
"tb",
|
||||
"pb",
|
||||
"m",
|
||||
"h",
|
||||
"d",
|
||||
}
|
||||
)
|
||||
|
|
@ -0,0 +1,788 @@
|
|||
// Copyright 2017 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"
|
||||
)
|
||||
|
||||
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