ing

central/api/module/probe.go

@@ -0,0 +1,5 @@
+package module
+
+const (
+	ProbeHeader_ProbeKey = "overFlow-Probe-Key"
+)

main.go

@@ -161,7 +161,10 @@ func main() {
 			return
 		}
 
-		handler = probe.New(confDir)
+		if handler, err = probe.New(confDir); nil != err {
+			logging.Logger.Error(fmt.Sprintf("Probe: error: %v", err))
+			return
+		}
 		if err := handler.Serve(); err != nil {
 			logging.Logger.Error(fmt.Sprintf("Probe: error: %v", err))
 			return

probe/probe.go

@@ -2,32 +2,112 @@ package probe
 
 import (
 	"context"
+	"errors"
+	"fmt"
+	"net/http"
+	"path"
 
+	lfcc "git.loafle.net/commons_go/config"
+	"git.loafle.net/commons_go/logging"
+	"git.loafle.net/overflow/overflow_probes/central/api/module"
+	"git.loafle.net/overflow/overflow_probes/central/client"
 	"git.loafle.net/overflow/overflow_probes/commons"
+	"git.loafle.net/overflow/overflow_probes/config"
+	opuu "git.loafle.net/overflow/overflow_probes/util/url"
 )
 
-func New(configDir string) Probe {
-	p := &probe{
-		configDir: configDir,
-	}
-
-	return p
-}
+const (
+	probeEntryPoint   = "/probe"
+	metricsEntryPoint = "/metrics"
+)
 
 type Probe interface {
 	commons.Handler
 }
 
 type probe struct {
-	configDir string
+	configDir       string
+	probeConfigPath string
+	probeConfig     config.ProbeConfig
+
+	probeEntryURL   string
+	metricsEntryURL string
+
+	probeClient   client.Client
+	metricsClient client.Client
+
+	shutdownChan chan bool
+}
+
+func New(configDir string) (Probe, error) {
+	p := &probe{
+		configDir:    configDir,
+		shutdownChan: make(chan bool),
+	}
+	var err error
+
+	if p.probeEntryURL, err = opuu.Join(config.Config.Central.URL, probeEntryPoint); nil != err {
+		return nil, err
+	}
+	if p.metricsEntryURL, err = opuu.Join(config.Config.Central.URL, metricsEntryPoint); nil != err {
+		return nil, err
+	}
+
+	p.probeConfigPath = path.Join(configDir, config.ProbeConfigFileName)
+
+	conf := lfcc.New()
+	if !lfcc.Exists(p.probeConfigPath) {
+		return nil, fmt.Errorf("Probe: Config file[%s] is not exist", p.probeConfigPath)
+	}
+
+	if err = conf.Load(&p.probeConfig, p.probeConfigPath); nil != err {
+		return nil, fmt.Errorf("Probe: Loading of Probe config file[%s] failed error[%v]", p.probeConfigPath, err)
+	}
+
+	return p, nil
 }
 
 func (p *probe) Serve() error {
+	var err error
 
-	return nil
+	if err = p.connectToCentral(); nil != err {
+		return err
+	}
+
+ListenLoop:
+	for {
+		select {
+		case <-p.shutdownChan:
+			err = errors.New("Shutting down")
+			break ListenLoop
+		}
+	}
+
+	return err
 }
 
 func (p *probe) Shutdown(ctx context.Context) error {
+	p.shutdownChan <- true
+	return nil
+}
+
+func (p *probe) connectToCentral() error {
+	header := http.Header{}
+	header[module.ProbeHeader_ProbeKey] = []string{*p.probeConfig.ID}
+
+	var res *http.Response
+	var err error
+	p.probeClient = client.New()
+	if res, err = p.probeClient.Dial(p.probeEntryURL, header, 4096, 4096); nil != err {
+		return err
+	}
+	logging.Logger.Debug(fmt.Sprintf("Probe: Connect Probe HTTP Status[%s]", res.Status))
+
+	p.metricsClient = client.New()
+	if res, err = p.metricsClient.Dial(p.metricsEntryURL, header, 4096, 4096); nil != err {
+		return err
+	}
+	logging.Logger.Debug(fmt.Sprintf("Probe: Connect Metrics HTTP Status[%s]", res.Status))
 
 	return nil
 }