add start metrics server

weed/command/filer.go

@@ -36,7 +36,7 @@ type FilerOptions struct {
 	disableHttp             *bool
 	cipher                  *bool
 	peers                   *string
-
+	metricsHttpPort         *int
 	// default leveldb directory, used in "weed server" mode
 	defaultLevelDbDirectory *string
 }
@@ -57,6 +57,7 @@ func init() {
 	f.disableHttp = cmdFiler.Flag.Bool("disableHttp", false, "disable http request, only gRpc operations are allowed")
 	f.cipher = cmdFiler.Flag.Bool("encryptVolumeData", false, "encrypt data on volume servers")
 	f.peers = cmdFiler.Flag.String("peers", "", "all filers sharing the same filer store in comma separated ip:port list")
+	f.metricsHttpPort = cmdFiler.Flag.Int("metricsPort", 0, "Prometheus metrics listen port")
 }
 
 var cmdFiler = &Command{
@@ -122,6 +123,7 @@ func (fo *FilerOptions) startFiler() {
 		Port:               uint32(*fo.port),
 		Cipher:             *fo.cipher,
 		Filers:             peers,
+		MetricsHttpPort:    *fo.metricsHttpPort,
 	})
 	if nfs_err != nil {
 		glog.Fatalf("Filer startup error: %v", nfs_err)

weed/command/s3.go

@@ -29,6 +29,7 @@ type S3Options struct {
 	domainName      *string
 	tlsPrivateKey   *string
 	tlsCertificate  *string
+	metricsHttpPort *int
 }
 
 func init() {
@@ -39,6 +40,7 @@ func init() {
 	s3StandaloneOptions.config = cmdS3.Flag.String("config", "", "path to the config file")
 	s3StandaloneOptions.tlsPrivateKey = cmdS3.Flag.String("key.file", "", "path to the TLS private key file")
 	s3StandaloneOptions.tlsCertificate = cmdS3.Flag.String("cert.file", "", "path to the TLS certificate file")
+	s3StandaloneOptions.metricsHttpPort = cmdS3.Flag.Int("metricsPort", 0, "Prometheus metrics listen port")
 }
 
 var cmdS3 = &Command{
@@ -153,6 +155,7 @@ func (s3opt *S3Options) startS3Server() bool {
 		}
 	}
 
+	go stats_collect.StartMetricsServer(stats_collect.S3Gather, *s3opt.metricsHttpPort)
 	go stats_collect.LoopPushingMetric("s3", stats_collect.SourceName(uint32(*s3opt.port)), stats_collect.S3Gather, metricsAddress, metricsIntervalSec)
 
 	router := mux.NewRouter().SkipClean(true)
@@ -169,7 +172,6 @@ func (s3opt *S3Options) startS3Server() bool {
 	if s3ApiServer_err != nil {
 		glog.Fatalf("S3 API Server startup error: %v", s3ApiServer_err)
 	}
-
 	httpS := &http.Server{Handler: router}
 
 	listenAddress := fmt.Sprintf(":%d", *s3opt.port)

weed/command/server.go

@@ -89,6 +89,7 @@ func init() {
 	filerOptions.dirListingLimit = cmdServer.Flag.Int("filer.dirListLimit", 1000, "limit sub dir listing size")
 	filerOptions.cipher = cmdServer.Flag.Bool("filer.encryptVolumeData", false, "encrypt data on volume servers")
 	filerOptions.peers = cmdServer.Flag.String("filer.peers", "", "all filers sharing the same filer store in comma separated ip:port list")
+	filerOptions.metricsHttpPort = cmdServer.Flag.Int("filer.metricsPort", 0, "Prometheus metrics listen port")
 
 	serverOptions.v.port = cmdServer.Flag.Int("volume.port", 8080, "volume server http listen port")
 	serverOptions.v.publicPort = cmdServer.Flag.Int("volume.port.public", 0, "volume server public port")
@@ -100,12 +101,14 @@ func init() {
 	serverOptions.v.publicUrl = cmdServer.Flag.String("volume.publicUrl", "", "publicly accessible address")
 	serverOptions.v.preStopSeconds = cmdServer.Flag.Int("volume.preStopSeconds", 10, "number of seconds between stop send heartbeats and stop volume server")
 	serverOptions.v.pprof = cmdServer.Flag.Bool("volume.pprof", false, "enable pprof http handlers. precludes --memprofile and --cpuprofile")
+	serverOptions.v.metricsHttpPort = cmdServer.Flag.Int("volume.metricsPort", 0, "Prometheus metrics listen port")
 
 	s3Options.port = cmdServer.Flag.Int("s3.port", 8333, "s3 server http listen port")
 	s3Options.domainName = cmdServer.Flag.String("s3.domainName", "", "suffix of the host name, {bucket}.{domainName}")
 	s3Options.tlsPrivateKey = cmdServer.Flag.String("s3.key.file", "", "path to the TLS private key file")
 	s3Options.tlsCertificate = cmdServer.Flag.String("s3.cert.file", "", "path to the TLS certificate file")
 	s3Options.config = cmdServer.Flag.String("s3.config", "", "path to the config file")
+	s3Options.metricsHttpPort = cmdServer.Flag.Int("s3.metricsPort", 0, "Prometheus metrics listen port")
 
 	msgBrokerOptions.port = cmdServer.Flag.Int("msgBroker.port", 17777, "broker gRPC listen port")
 

weed/command/volume.go

@@ -56,6 +56,7 @@ type VolumeServerOptions struct {
 	minFreeSpacePercents  []float32
 	pprof                 *bool
 	preStopSeconds        *int
+	metricsHttpPort       *int
 	// pulseSeconds          *int
 }
 
@@ -80,6 +81,7 @@ func init() {
 	v.compactionMBPerSecond = cmdVolume.Flag.Int("compactionMBps", 0, "limit background compaction or copying speed in mega bytes per second")
 	v.fileSizeLimitMB = cmdVolume.Flag.Int("fileSizeLimitMB", 1024, "limit file size to avoid out of memory")
 	v.pprof = cmdVolume.Flag.Bool("pprof", false, "enable pprof http handlers. precludes --memprofile and --cpuprofile")
+	v.metricsHttpPort = cmdVolume.Flag.Int("metricsPort", 0, "Prometheus metrics listen port")
 }
 
 var cmdVolume = &Command{
@@ -207,6 +209,7 @@ func (v VolumeServerOptions) startVolumeServer(volumeFolders, maxVolumeCounts, v
 		*v.fixJpgOrientation, *v.readRedirect,
 		*v.compactionMBPerSecond,
 		*v.fileSizeLimitMB,
+		*v.metricsHttpPort,
 	)
 	// starting grpc server
 	grpcS := v.startGrpcService(volumeServer)

weed/server/filer_server.go

@@ -54,6 +54,7 @@ type FilerOption struct {
 	recursiveDelete    bool
 	Cipher             bool
 	Filers             []string
+	MetricsHttpPort    int
 }
 
 type FilerServer struct {
@@ -157,6 +158,7 @@ func (fs *FilerServer) maybeStartMetrics() {
 		}
 	}
 
+	go stats.StartMetricsServer(stats.FilerGather, fs.option.MetricsHttpPort)
 	go stats.LoopPushingMetric("filer", stats.SourceName(fs.option.Port), stats.FilerGather, fs.metricsAddress, fs.metricsIntervalSec)
 }
 

weed/server/volume_server.go

@@ -46,6 +46,7 @@ func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
 	readRedirect bool,
 	compactionMBPerSecond int,
 	fileSizeLimitMB int,
+	metricsHttpPort int,
 ) *VolumeServer {
 
 	v := util.GetViper()
@@ -97,6 +98,7 @@ func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
 	}
 
 	go vs.heartbeat()
+	go stats.StartMetricsServer(stats.VolumeServerGather, metricsHttpPort)
 	go stats.LoopPushingMetric("volumeServer", fmt.Sprintf("%s:%d", ip, port), stats.VolumeServerGather, vs.metricsAddress, vs.metricsIntervalSec)
 
 	return vs

weed/stats/metrics.go

@@ -2,11 +2,14 @@ package stats
 
 import (
 	"fmt"
+	"log"
+	"net/http"
 	"os"
 	"strings"
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/prometheus/client_golang/prometheus/push"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
@@ -150,6 +153,14 @@ func LoopPushingMetric(name, instance string, gatherer *prometheus.Registry, add
 	}
 }
 
+func StartMetricsServer(gatherer *prometheus.Registry, port int) {
+	if port == 0 {
+		return
+	}
+	http.Handle("/metrics", promhttp.HandlerFor(gatherer, promhttp.HandlerOpts{}))
+	log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", port), nil))
+}
+
 func SourceName(port uint32) string {
 	hostname, err := os.Hostname()
 	if err != nil {