102 lines
2.9 KiB
Go
102 lines
2.9 KiB
Go
// 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 validations
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"regexp"
|
|
"strings"
|
|
|
|
dto "github.com/prometheus/client_model/go"
|
|
)
|
|
|
|
var camelCase = regexp.MustCompile(`[a-z][A-Z]`)
|
|
|
|
// LintMetricUnits detects issues with metric unit names.
|
|
func LintMetricUnits(mf *dto.MetricFamily) []error {
|
|
var problems []error
|
|
|
|
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 = append(problems, fmt.Errorf("use base unit %q instead of %q", base, unit))
|
|
|
|
return problems
|
|
}
|
|
|
|
// LintMetricTypeInName detects when the metric type is included in the metric name.
|
|
func LintMetricTypeInName(mf *dto.MetricFamily) []error {
|
|
if mf.GetType() == dto.MetricType_UNTYPED {
|
|
return nil
|
|
}
|
|
|
|
var problems []error
|
|
|
|
n := strings.ToLower(mf.GetName())
|
|
typename := strings.ToLower(mf.GetType().String())
|
|
|
|
if strings.Contains(n, "_"+typename+"_") || strings.HasSuffix(n, "_"+typename) {
|
|
problems = append(problems, fmt.Errorf(`metric name should not include type '%s'`, typename))
|
|
}
|
|
|
|
return problems
|
|
}
|
|
|
|
// LintReservedChars detects colons in metric names.
|
|
func LintReservedChars(mf *dto.MetricFamily) []error {
|
|
var problems []error
|
|
if strings.Contains(mf.GetName(), ":") {
|
|
problems = append(problems, errors.New("metric names should not contain ':'"))
|
|
}
|
|
return problems
|
|
}
|
|
|
|
// LintCamelCase detects metric names and label names written in camelCase.
|
|
func LintCamelCase(mf *dto.MetricFamily) []error {
|
|
var problems []error
|
|
if camelCase.FindString(mf.GetName()) != "" {
|
|
problems = append(problems, errors.New("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 = append(problems, errors.New("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) []error {
|
|
var problems []error
|
|
n := strings.ToLower(mf.GetName())
|
|
for _, s := range unitAbbreviations {
|
|
if strings.Contains(n, "_"+s+"_") || strings.HasSuffix(n, "_"+s) {
|
|
problems = append(problems, errors.New("metric names should not contain abbreviated units"))
|
|
}
|
|
}
|
|
return problems
|
|
}
|