prometheus/config/config.go

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// Copyright 2013 Prometheus Team
// 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 config
import (
"errors"
"fmt"
"github.com/prometheus/prometheus/model"
"github.com/prometheus/prometheus/utility"
"time"
)
type Config struct {
Global *GlobalConfig
Jobs []JobConfig
}
type GlobalConfig struct {
ScrapeInterval time.Duration
EvaluationInterval time.Duration
Labels model.LabelSet
RuleFiles []string
}
type JobConfig struct {
Name string
ScrapeInterval time.Duration
Targets []Targets
}
type Targets struct {
Endpoints []string
Labels model.LabelSet
}
func New() *Config {
return &Config{
Global: &GlobalConfig{Labels: model.LabelSet{}},
}
}
func (config *Config) AddJob(options map[string]string, targets []Targets) error {
name, ok := options["name"]
if !ok {
return errors.New("Missing job name")
}
if len(targets) == 0 {
return fmt.Errorf("No targets configured for job '%v'", name)
}
job := JobConfig{
Targets: tmpJobTargets,
}
for option, value := range options {
if err := job.SetOption(option, value); err != nil {
return err
}
}
config.Jobs = append(config.Jobs, job)
return nil
}
func (config *Config) GetJobByName(name string) (jobConfig *JobConfig) {
for _, job := range config.Jobs {
if job.Name == name {
jobConfig = &job
break
}
}
return
}
func (config *GlobalConfig) SetOption(option string, value string) (err error) {
switch option {
case "scrape_interval":
config.ScrapeInterval, err = utility.StringToDuration(value)
return nil
case "evaluation_interval":
config.EvaluationInterval, err = utility.StringToDuration(value)
return err
default:
err = fmt.Errorf("Unrecognized global configuration option '%v'", option)
}
return
}
func (config *GlobalConfig) SetLabels(labels model.LabelSet) {
for k, v := range labels {
config.Labels[k] = v
}
}
func (config *GlobalConfig) AddRuleFiles(ruleFiles []string) {
for _, ruleFile := range ruleFiles {
config.RuleFiles = append(config.RuleFiles, ruleFile)
}
}
func (job *JobConfig) SetOption(option string, value string) (err error) {
switch option {
case "name":
job.Name = value
case "scrape_interval":
job.ScrapeInterval, err = utility.StringToDuration(value)
default:
err = fmt.Errorf("Unrecognized job configuration option '%v'", option)
}
return
}
func (job *JobConfig) AddTargets(endpoints []string, labels model.LabelSet) {
targets := Targets{
Endpoints: endpoints,
Labels: labels,
}
job.Targets = append(job.Targets, targets)
}