prometheus/main.go

105 lines
3.1 KiB
Go
Raw Normal View History

// Copyright 2013 Prometheus Team
2012-11-26 19:11:34 +00:00
// 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.
2012-11-24 11:33:34 +00:00
package main
import (
"flag"
2013-03-01 17:51:36 +00:00
"fmt"
"github.com/prometheus/prometheus/appstate"
"github.com/prometheus/prometheus/config"
"github.com/prometheus/prometheus/retrieval"
"github.com/prometheus/prometheus/retrieval/format"
"github.com/prometheus/prometheus/rules"
"github.com/prometheus/prometheus/rules/ast"
"github.com/prometheus/prometheus/storage/metric"
"github.com/prometheus/prometheus/web"
"log"
"os"
2013-01-06 22:30:46 +00:00
"os/signal"
2013-02-08 17:03:26 +00:00
"time"
2012-11-24 11:33:34 +00:00
)
// Commandline flags.
var (
2013-03-01 17:51:36 +00:00
_ = fmt.Sprintf("")
configFile = flag.String("configFile", "prometheus.conf", "Prometheus configuration file name.")
metricsStoragePath = flag.String("metricsStoragePath", "/tmp/metrics", "Base path for metrics storage.")
scrapeResultsQueueCapacity = flag.Int("scrapeResultsQueueCapacity", 4096, "The size of the scrape results queue.")
ruleResultsQueueCapacity = flag.Int("ruleResultsQueueCapacity", 4096, "The size of the rule results queue.")
concurrentRetrievalAllowance = flag.Int("concurrentRetrievalAllowance", 15, "The number of concurrent metrics retrieval requests allowed.")
)
2012-11-24 11:33:34 +00:00
func main() {
flag.Parse()
conf, err := config.LoadFromFile(*configFile)
if err != nil {
log.Fatalf("Error loading configuration from %s: %v", *configFile, err)
}
ts, err := metric.NewTieredStorage(5000, 5000, 100, time.Second*30, time.Second*1, time.Second*20, *metricsStoragePath)
if err != nil {
log.Fatalf("Error opening storage: %s", err)
}
go ts.Serve()
2013-01-06 22:30:46 +00:00
go func() {
notifier := make(chan os.Signal)
signal.Notify(notifier, os.Interrupt)
<-notifier
ts.Close()
2013-01-06 22:30:46 +00:00
os.Exit(0)
}()
// Queue depth will need to be exposed
scrapeResults := make(chan format.Result, *scrapeResultsQueueCapacity)
2013-01-04 13:41:47 +00:00
targetManager := retrieval.NewTargetManager(scrapeResults, *concurrentRetrievalAllowance)
targetManager.AddTargetsFromConfig(conf)
ruleResults := make(chan *rules.Result, *ruleResultsQueueCapacity)
ast.SetStorage(ts)
ruleManager := rules.NewRuleManager(ruleResults, conf.Global.EvaluationInterval)
err = ruleManager.AddRulesFromConfig(conf)
if err != nil {
log.Fatalf("Error loading rule files: %v", err)
}
appState := &appstate.ApplicationState{
Config: conf,
RuleManager: ruleManager,
Storage: ts,
TargetManager: targetManager,
}
web.StartServing(appState)
2013-01-04 13:41:47 +00:00
for {
select {
case scrapeResult := <-scrapeResults:
if scrapeResult.Err == nil {
2013-02-08 17:03:26 +00:00
ts.AppendSample(scrapeResult.Sample)
}
2013-02-08 17:03:26 +00:00
case ruleResult := <-ruleResults:
if ruleResult.Err == nil {
for _, sample := range ruleResult.Samples {
ts.AppendSample(sample)
}
}
}
2012-11-24 11:33:34 +00:00
}
}