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prometheus/rules/manager.go

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2.0 KiB

// 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 rules
import (
"github.com/prometheus/prometheus/config"
"github.com/prometheus/prometheus/rules/ast"
"log"
"sync"
"time"
)
type Result struct {
Err error // TODO propagate errors from rule evaluation.
Samples ast.Vector
}
type RuleManager interface {
AddRulesFromConfig(config *config.Config) error
}
type ruleManager struct {
rules []*Rule
results chan *Result
done chan bool
interval time.Duration
}
func NewRuleManager(results chan *Result, interval time.Duration) RuleManager {
manager := &ruleManager{
results: results,
rules: []*Rule{},
interval: interval,
}
go manager.run(results)
return manager
}
func (m *ruleManager) run(results chan *Result) {
ticker := time.Tick(m.interval)
for {
select {
case <-ticker:
m.runIteration(results)
case <-m.done:
log.Printf("RuleManager exiting...")
break
}
}
}
func (m *ruleManager) Stop() {
m.done <- true
}
func (m *ruleManager) runIteration(results chan *Result) {
now := time.Now()
wg := sync.WaitGroup{}
for _, rule := range m.rules {
wg.Add(1)
go func(rule *Rule) {
vector, err := rule.Eval(&now)
m.results <- &Result{
Samples: vector,
Err: err,
}
wg.Done()
}(rule)
}
wg.Wait()
}
func (m *ruleManager) AddRulesFromConfig(config *config.Config) error {
for _, ruleFile := range config.Global.RuleFiles {
newRules, err := LoadRulesFromFile(ruleFile)
if err != nil {
return err
}
m.rules = append(m.rules, newRules...)
}
return nil
}