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dcos-metrics.go
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/
dcos-metrics.go
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// Copyright 2016 Mesosphere, Inc.
//
// 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.
// 'go generate' must be run for the 'metrics_schema' package to be present:
//go:generate go generate github.com/dcos/dcos-metrics/schema/
package main
import (
"os"
"reflect"
"strings"
log "github.com/sirupsen/logrus"
frameworkCollector "github.com/dcos/dcos-metrics/collectors/framework"
mesosAgentCollector "github.com/dcos/dcos-metrics/collectors/mesos/agent"
nodeCollector "github.com/dcos/dcos-metrics/collectors/node"
"github.com/dcos/dcos-metrics/producers"
httpProducer "github.com/dcos/dcos-metrics/producers/http"
promProducer "github.com/dcos/dcos-metrics/producers/prometheus"
"github.com/dcos/dcos-metrics/util/http/profiler"
)
func main() {
// Get configuration
cfg, err := getNewConfig(os.Args[1:])
if err != nil {
log.Fatal(err)
os.Exit(1)
}
// Set logging level
lvl, err := log.ParseLevel(cfg.LogLevel)
if err != nil {
log.Fatal(err)
os.Exit(1)
}
log.SetLevel(lvl)
// HTTP profiling
if cfg.Collector.HTTPProfiler {
log.Info("HTTP profiling enabled")
go profiler.RunHTTPProfAccess()
}
var producerChans []chan<- producers.MetricsMessage
// HTTP producer
if producerIsConfigured("http", cfg) {
log.Info("HTTP producer enabled")
cfg.Producers.HTTPProducerConfig.DCOSRole = cfg.DCOSRole
hp, httpProducerChan := httpProducer.New(
cfg.Producers.HTTPProducerConfig)
producerChans = append(producerChans, httpProducerChan)
go hp.Run()
}
// Prometheus producer
if producerIsConfigured("prometheus", cfg) {
log.Info("Prometheus producer enabled")
pp, promChan := promProducer.New(
cfg.Producers.PrometheusProducerConfig)
producerChans = append(producerChans, promChan)
go pp.Run()
}
// Initialize and run the node poller
node, nodeChan := nodeCollector.New(*cfg.Collector.Node, cfg.nodeInfo)
go node.RunPoller()
// Create a ContainerTaskRels object for collectors to rely on
containerTaskRels := mesosAgentCollector.NewContainerTaskRels()
// Initialize and run the StatsD collector and the Mesos agent poller
mesosAgent, mesosAgentChan := mesosAgentCollector.New(*cfg.Collector.MesosAgent, cfg.nodeInfo, containerTaskRels)
framework, frameworkChan := frameworkCollector.New(*cfg.Collector.Framework, cfg.nodeInfo, containerTaskRels)
if cfg.DCOSRole == "agent" {
go framework.RunFrameworkTCPListener()
go mesosAgent.RunPoller()
}
// Broadcast (many-to-many) messages from the collector to the various producers.
for {
select {
case metric := <-frameworkChan:
broadcast(metric, producerChans)
case metric := <-nodeChan:
broadcast(metric, producerChans)
case metric := <-mesosAgentChan:
broadcast(metric, producerChans)
}
}
}
// broadcast sends a MetricsMessage to a range of producer chans
func broadcast(msg producers.MetricsMessage, producers []chan<- producers.MetricsMessage) {
for _, producer := range producers {
producer <- msg
}
}
// producerIsConfigured analyzes the ProducersConfig struct and determines if
// configuration exists for a given producer by name (i.e., is the "http"
// producer configured?). If a configuration exists, this function will return
// true, as a configured producer is an enabled one.
func producerIsConfigured(name string, cfg Config) bool {
s := reflect.ValueOf(cfg.Producers)
cfgType := s.Type()
for i := 0; i < s.NumField(); i++ {
if strings.Split(cfgType.Field(i).Tag.Get("yaml"), ",")[0] == name {
return true
}
}
return false
}