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synced 2024-11-09 23:24:05 -08:00
More promlint rules (#5515)
* Extra promlint rules for Issue 5453 * broaden type name and camelCase checks * Expand unit test to catch non base units * Use only celsius as the base unit for temperature * Remove candela and moles from the unit check Signed-off-by: David Ellis <ellisda@gmail.com>
This commit is contained in:
David Ellis
Chris Marchbanks
parent
94b1af1471
commit
dbfd493265
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@ -17,6 +17,7 @@ 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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@ -101,6 +102,10 @@ func lint(mf dto.MetricFamily) []Problem {
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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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@ -205,12 +210,70 @@ func lintHistogramSummaryReserved(mf dto.MetricFamily) []Problem {
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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 problems
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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.Add(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 problems
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if strings.Contains(mf.GetName(), ":") {
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problems.Add(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 problems
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if camelCase.FindString(mf.GetName()) != "" {
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problems.Add(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.Add(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 problems
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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.Add(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 _, u := range baseUnits {
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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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@ -219,8 +282,8 @@ func metricUnits(m string) (unit string, base string, ok bool) {
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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+u {
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return p + u, u, true
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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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@ -232,17 +295,41 @@ func metricUnits(m string) (unit string, base string, ok bool) {
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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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baseUnits = []string{
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"amperes",
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"bytes",
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"candela",
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"grams",
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"kelvin", // Both plural and non-plural form allowed.
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"kelvins",
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"meters", // Both American and international spelling permitted.
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"metres",
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"moles",
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"seconds",
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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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@ -265,4 +352,22 @@ var (
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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",
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"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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}
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)
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@ -14,6 +14,7 @@
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package promlint_test
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import (
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"fmt"
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"reflect"
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"strings"
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"testing"
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@ -21,14 +22,16 @@ import (
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"github.com/prometheus/prometheus/util/promlint"
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)
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type test struct {
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name string
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in string
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problems []promlint.Problem
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}
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func TestLintNoHelpText(t *testing.T) {
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const msg = "no help text"
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tests := []struct {
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name string
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in string
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problems []promlint.Problem
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}{
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tests := []test{
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{
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name: "no help",
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in: `
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@ -81,22 +84,7 @@ go_goroutines 24
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`,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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l := promlint.New(strings.NewReader(tt.in))
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problems, err := l.Lint()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if want, got := tt.problems, problems; !reflect.DeepEqual(want, got) {
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t.Fatalf("unexpected problems:\n- want: %v\n- got: %v",
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want, got)
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}
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})
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}
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runTests(t, tests)
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}
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func TestLintMetricUnits(t *testing.T) {
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@ -105,9 +93,83 @@ func TestLintMetricUnits(t *testing.T) {
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in string
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problems []promlint.Problem
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}{
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// good cases.
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{
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name: "amperes",
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in: `
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# HELP x_amperes Test metric.
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# TYPE x_amperes untyped
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x_amperes 10
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`,
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},
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{
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name: "bytes",
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in: `
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# HELP x_bytes Test metric.
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# TYPE x_bytes untyped
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x_bytes 10
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`,
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},
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{
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name: "grams",
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in: `
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# HELP x_grams Test metric.
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# TYPE x_grams untyped
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x_grams 10
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`,
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},
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{
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name: "celsius",
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in: `
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# HELP x_celsius Test metric.
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# TYPE x_celsius untyped
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x_celsius 10
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`,
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},
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{
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name: "meters",
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in: `
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# HELP x_meters Test metric.
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# TYPE x_meters untyped
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x_meters 10
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`,
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},
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{
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name: "metres",
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in: `
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# HELP x_metres Test metric.
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# TYPE x_metres untyped
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x_metres 10
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`,
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},
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{
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name: "moles",
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in: `
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# HELP x_moles Test metric.
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# TYPE x_moles untyped
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x_moles 10
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`,
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},
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{
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name: "seconds",
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in: `
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# HELP x_seconds Test metric.
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# TYPE x_seconds untyped
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x_seconds 10
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`,
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},
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{
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name: "joules",
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in: `
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# HELP x_joules Test metric.
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# TYPE x_joules untyped
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x_joules 10
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`,
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},
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// bad cases.
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{
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name: "milliamperes",
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in: `
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# HELP x_milliamperes Test metric.
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# TYPE x_milliamperes untyped
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x_milliamperes 10
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@ -118,7 +180,7 @@ x_milliamperes 10
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}},
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},
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{
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name: "bytes",
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name: "gigabytes",
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in: `
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# HELP x_gigabytes Test metric.
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# TYPE x_gigabytes untyped
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@ -130,19 +192,7 @@ x_gigabytes 10
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}},
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},
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{
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name: "candela",
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in: `
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# HELP x_kilocandela Test metric.
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# TYPE x_kilocandela untyped
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x_kilocandela 10
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`,
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problems: []promlint.Problem{{
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Metric: "x_kilocandela",
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Text: `use base unit "candela" instead of "kilocandela"`,
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}},
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},
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{
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name: "grams",
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name: "kilograms",
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in: `
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# HELP x_kilograms Test metric.
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# TYPE x_kilograms untyped
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@ -154,31 +204,19 @@ x_kilograms 10
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}},
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},
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{
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name: "kelvin",
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name: "nanocelsius",
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in: `
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# HELP x_nanokelvin Test metric.
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# TYPE x_nanokelvin untyped
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x_nanokelvin 10
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# HELP x_nanocelsius Test metric.
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# TYPE x_nanocelsius untyped
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x_nanocelsius 10
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`,
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problems: []promlint.Problem{{
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Metric: "x_nanokelvin",
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Text: `use base unit "kelvin" instead of "nanokelvin"`,
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Metric: "x_nanocelsius",
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Text: `use base unit "celsius" instead of "nanocelsius"`,
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}},
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},
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{
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name: "kelvins",
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in: `
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# HELP x_nanokelvins Test metric.
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# TYPE x_nanokelvins untyped
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x_nanokelvins 10
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`,
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problems: []promlint.Problem{{
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Metric: "x_nanokelvins",
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Text: `use base unit "kelvins" instead of "nanokelvins"`,
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}},
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},
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{
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name: "meters",
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name: "kilometers",
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in: `
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# HELP x_kilometers Test metric.
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# TYPE x_kilometers untyped
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@ -190,31 +228,19 @@ x_kilometers 10
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}},
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},
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{
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name: "metres",
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name: "picometers",
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in: `
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# HELP x_kilometres Test metric.
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# TYPE x_kilometres untyped
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x_kilometres 10
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# HELP x_picometers Test metric.
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# TYPE x_picometers untyped
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x_picometers 10
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`,
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problems: []promlint.Problem{{
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Metric: "x_kilometres",
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Text: `use base unit "metres" instead of "kilometres"`,
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Metric: "x_picometers",
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Text: `use base unit "meters" instead of "picometers"`,
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}},
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},
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{
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name: "moles",
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in: `
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# HELP x_picomoles Test metric.
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# TYPE x_picomoles untyped
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x_picomoles 10
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`,
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problems: []promlint.Problem{{
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Metric: "x_picomoles",
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Text: `use base unit "moles" instead of "picomoles"`,
|
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}},
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},
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{
|
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name: "seconds",
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name: "microseconds",
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in: `
|
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# HELP x_microseconds Test metric.
|
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# TYPE x_microseconds untyped
|
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|
|
@ -226,12 +252,168 @@ x_microseconds 10
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}},
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},
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{
|
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name: "OK",
|
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name: "minutes",
|
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in: `
|
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# HELP thermometers_kelvin Test metric with name that looks like "meters".
|
||||
# TYPE thermometers_kelvin untyped
|
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thermometers_kelvin 0
|
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# HELP x_minutes Test metric.
|
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# TYPE x_minutes untyped
|
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x_minutes 10
|
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`,
|
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problems: []promlint.Problem{{
|
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Metric: "x_minutes",
|
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Text: `use base unit "seconds" instead of "minutes"`,
|
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}},
|
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},
|
||||
{
|
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name: "hours",
|
||||
in: `
|
||||
# HELP x_hours Test metric.
|
||||
# TYPE x_hours untyped
|
||||
x_hours 10
|
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`,
|
||||
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
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`,
|
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problems: []promlint.Problem{{
|
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Metric: "x_kelvin",
|
||||
Text: `use base unit "celsius" instead of "kelvin"`,
|
||||
}},
|
||||
},
|
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{
|
||||
name: "kelvins",
|
||||
in: `
|
||||
# HELP x_kelvins Test metric.
|
||||
# TYPE x_kelvins untyped
|
||||
x_kelvins 10
|
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`,
|
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problems: []promlint.Problem{{
|
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Metric: "x_kelvins",
|
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Text: `use base unit "celsius" instead of "kelvins"`,
|
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}},
|
||||
},
|
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{
|
||||
name: "fahrenheit",
|
||||
in: `
|
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# HELP thermometers_fahrenheit Test metric.
|
||||
# TYPE thermometers_fahrenheit untyped
|
||||
thermometers_fahrenheit 10
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`,
|
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problems: []promlint.Problem{{
|
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Metric: "thermometers_fahrenheit",
|
||||
Text: `use base unit "celsius" instead of "fahrenheit"`,
|
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}},
|
||||
},
|
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{
|
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name: "rankine",
|
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in: `
|
||||
# HELP thermometers_rankine Test metric.
|
||||
# TYPE thermometers_rankine untyped
|
||||
thermometers_rankine 10
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||||
`,
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problems: []promlint.Problem{{
|
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Metric: "thermometers_rankine",
|
||||
Text: `use base unit "celsius" instead of "rankine"`,
|
||||
}},
|
||||
}, {
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name: "inches",
|
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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"`,
|
||||
}},
|
||||
},
|
||||
}
|
||||
|
||||
|
|
@ -253,11 +435,7 @@ thermometers_kelvin 0
|
|||
}
|
||||
|
||||
func TestLintCounter(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
in string
|
||||
problems []promlint.Problem
|
||||
}{
|
||||
tests := []test{
|
||||
{
|
||||
name: "counter without _total suffix",
|
||||
in: `
|
||||
|
|
@ -316,29 +494,11 @@ x_bytes 10
|
|||
},
|
||||
}
|
||||
|
||||
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)
|
||||
}
|
||||
})
|
||||
}
|
||||
runTests(t, tests)
|
||||
}
|
||||
|
||||
func TestLintHistogramSummaryReserved(t *testing.T) {
|
||||
tests := []struct {
|
||||
name string
|
||||
in string
|
||||
problems []promlint.Problem
|
||||
}{
|
||||
tests := []test{
|
||||
{
|
||||
name: "gauge with _bucket suffix",
|
||||
in: `
|
||||
|
|
@ -478,7 +638,138 @@ 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{
|
||||
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))
|
||||
|
|
|
|||
Loading…
Reference in a new issue