Example #1
0
func TestMultiPublisher(t *testing.T) {
	var (
		a1 = &mockPublisher{} // target a, endpoint 1
		a2 = &mockPublisher{} // target a, endpoint 2 (duplicate)
		b2 = &mockPublisher{} // target b, endpoint 2 (duplicate)
		b3 = &mockPublisher{} // target b, endpoint 3
	)

	sum := func() int { return a1.count + a2.count + b2.count + b3.count }

	mp := xfer.NewMultiPublisher(func(endpoint string) (string, xfer.Publisher, error) {
		switch endpoint {
		case "a1":
			return "1", a1, nil
		case "a2":
			return "2", a2, nil
		case "b2":
			return "2", b2, nil
		case "b3":
			return "3", b3, nil
		default:
			return "", nil, fmt.Errorf("invalid endpoint %s", endpoint)
		}
	})
	defer mp.Stop()

	mp.Set("a", []string{"a1", "a2"})
	mp.Set("b", []string{"b2", "b3"})

	for i := 1; i < 10; i++ {
		if err := mp.Publish(&bytes.Buffer{}); err != nil {
			t.Error(err)
		}
		if want, have := 3*i, sum(); want != have {
			t.Errorf("want %d, have %d", want, have)
		}
	}
}
Example #2
0
func TestMultiPublisher(t *testing.T) {
	var (
		p              = &mockPublisher{}
		factory        = func(string) (xfer.Publisher, error) { return p, nil }
		multiPublisher = xfer.NewMultiPublisher(factory)
	)

	multiPublisher.Add("first")
	if err := multiPublisher.Publish(report.MakeReport()); err != nil {
		t.Error(err)
	}
	if want, have := 1, p.count; want != have {
		t.Errorf("want %d, have %d", want, have)
	}

	multiPublisher.Add("second") // but factory returns same mockPublisher
	if err := multiPublisher.Publish(report.MakeReport()); err != nil {
		t.Error(err)
	}
	if want, have := 3, p.count; want != have {
		t.Errorf("want %d, have %d", want, have)
	}
}
Example #3
0
func main() {
	var (
		targets            = []string{fmt.Sprintf("localhost:%d", xfer.AppPort), fmt.Sprintf("scope.weave.local:%d", xfer.AppPort)}
		token              = flag.String("token", "default-token", "probe token")
		httpListen         = flag.String("http.listen", "", "listen address for HTTP profiling and instrumentation server")
		publishInterval    = flag.Duration("publish.interval", 3*time.Second, "publish (output) interval")
		spyInterval        = flag.Duration("spy.interval", time.Second, "spy (scan) interval")
		spyProcs           = flag.Bool("processes", true, "report processes (needs root)")
		dockerEnabled      = flag.Bool("docker", false, "collect Docker-related attributes for processes")
		dockerInterval     = flag.Duration("docker.interval", 10*time.Second, "how often to update Docker attributes")
		dockerBridge       = flag.String("docker.bridge", "docker0", "the docker bridge name")
		kubernetesEnabled  = flag.Bool("kubernetes", false, "collect kubernetes-related attributes for containers, should only be enabled on the master node")
		kubernetesAPI      = flag.String("kubernetes.api", "http://localhost:8080", "Address of kubernetes master api")
		kubernetesInterval = flag.Duration("kubernetes.interval", 10*time.Second, "how often to do a full resync of the kubernetes data")
		weaveRouterAddr    = flag.String("weave.router.addr", "", "IP address or FQDN of the Weave router")
		procRoot           = flag.String("proc.root", "/proc", "location of the proc filesystem")
		printVersion       = flag.Bool("version", false, "print version number and exit")
		useConntrack       = flag.Bool("conntrack", true, "also use conntrack to track connections")
		insecure           = flag.Bool("insecure", false, "(SSL) explicitly allow \"insecure\" SSL connections and transfers")
		logPrefix          = flag.String("log.prefix", "<probe>", "prefix for each log line")
	)
	flag.Parse()

	if *printVersion {
		fmt.Println(version)
		return
	}

	// Setup in memory metrics sink
	inm := metrics.NewInmemSink(time.Minute, 2*time.Minute)
	sig := metrics.DefaultInmemSignal(inm)
	defer sig.Stop()
	metrics.NewGlobal(metrics.DefaultConfig("scope-probe"), inm)

	if !strings.HasSuffix(*logPrefix, " ") {
		*logPrefix += " "
	}
	log.SetPrefix(*logPrefix)

	defer log.Print("probe exiting")

	if *spyProcs && os.Getegid() != 0 {
		log.Printf("warning: -process=true, but that requires root to find everything")
	}

	rand.Seed(time.Now().UnixNano())
	probeID := strconv.FormatInt(rand.Int63(), 16)
	var (
		hostName = probe.Hostname()
		hostID   = hostName // TODO(pb): we should sanitize the hostname
	)
	log.Printf("probe starting, version %s, ID %s", version, probeID)

	addrs, err := net.InterfaceAddrs()
	if err != nil {
		log.Fatal(err)
	}
	localNets := report.Networks{}
	for _, addr := range addrs {
		// Not all addrs are IPNets.
		if ipNet, ok := addr.(*net.IPNet); ok {
			localNets = append(localNets, ipNet)
		}
	}

	if len(flag.Args()) > 0 {
		targets = flag.Args()
	}
	log.Printf("publishing to: %s", strings.Join(targets, ", "))

	factory := func(hostname, endpoint string) (string, xfer.Publisher, error) {
		id, publisher, err := xfer.NewHTTPPublisher(hostname, endpoint, *token, probeID, *insecure)
		if err != nil {
			return "", nil, err
		}
		return id, xfer.NewBackgroundPublisher(publisher), nil
	}

	publishers := xfer.NewMultiPublisher(factory)
	defer publishers.Stop()

	clients := xfer.NewMultiAppClient(xfer.ProbeConfig{
		Token:    *token,
		ProbeID:  probeID,
		Insecure: *insecure,
	}, xfer.ControlHandlerFunc(controls.HandleControlRequest), xfer.NewAppClient)
	defer clients.Stop()

	resolver := xfer.NewStaticResolver(targets, publishers.Set, clients.Set)
	defer resolver.Stop()

	endpointReporter := endpoint.NewReporter(hostID, hostName, *spyProcs, *useConntrack)
	defer endpointReporter.Stop()

	processCache := process.NewCachingWalker(process.NewWalker(*procRoot))
	p := probe.New(*spyInterval, *publishInterval, publishers)
	p.AddTicker(processCache)
	p.AddReporter(
		endpointReporter,
		host.NewReporter(hostID, hostName, localNets),
		process.NewReporter(processCache, hostID),
	)
	p.AddTagger(probe.NewTopologyTagger(), host.NewTagger(hostID, probeID))

	if *dockerEnabled {
		if err := report.AddLocalBridge(*dockerBridge); err != nil {
			log.Printf("Docker: problem with bridge %s: %v", *dockerBridge, err)
		}
		if registry, err := docker.NewRegistry(*dockerInterval); err == nil {
			defer registry.Stop()
			p.AddTagger(docker.NewTagger(registry, processCache))
			p.AddReporter(docker.NewReporter(registry, hostID, p))
		} else {
			log.Printf("Docker: failed to start registry: %v", err)
		}
	}

	if *kubernetesEnabled {
		if client, err := kubernetes.NewClient(*kubernetesAPI, *kubernetesInterval); err == nil {
			defer client.Stop()
			p.AddReporter(kubernetes.NewReporter(client))
		} else {
			log.Printf("Kubernetes: failed to start client: %v", err)
		}
	}

	if *weaveRouterAddr != "" {
		weave := overlay.NewWeave(hostID, *weaveRouterAddr)
		defer weave.Stop()
		p.AddTicker(weave)
		p.AddTagger(weave)
		p.AddReporter(weave)
	}

	if *httpListen != "" {
		go func() {
			log.Printf("Profiling data being exported to %s", *httpListen)
			log.Printf("go tool pprof http://%s/debug/pprof/{profile,heap,block}", *httpListen)
			log.Printf("Profiling endpoint %s terminated: %v", *httpListen, http.ListenAndServe(*httpListen, nil))
		}()
	}

	p.Start()
	defer p.Stop()

	log.Printf("%s", <-interrupt())
}
Example #4
0
func main() {
	var (
		targets            = []string{fmt.Sprintf("localhost:%d", xfer.AppPort), fmt.Sprintf("scope.weave.local:%d", xfer.AppPort)}
		token              = flag.String("token", "default-token", "probe token")
		httpListen         = flag.String("http.listen", "", "listen address for HTTP profiling and instrumentation server")
		publishInterval    = flag.Duration("publish.interval", 3*time.Second, "publish (output) interval")
		spyInterval        = flag.Duration("spy.interval", time.Second, "spy (scan) interval")
		prometheusEndpoint = flag.String("prometheus.endpoint", "/metrics", "Prometheus metrics exposition endpoint (requires -http.listen)")
		spyProcs           = flag.Bool("processes", true, "report processes (needs root)")
		dockerEnabled      = flag.Bool("docker", false, "collect Docker-related attributes for processes")
		dockerInterval     = flag.Duration("docker.interval", 10*time.Second, "how often to update Docker attributes")
		dockerBridge       = flag.String("docker.bridge", "docker0", "the docker bridge name")
		weaveRouterAddr    = flag.String("weave.router.addr", "", "IP address or FQDN of the Weave router")
		procRoot           = flag.String("proc.root", "/proc", "location of the proc filesystem")
		printVersion       = flag.Bool("version", false, "print version number and exit")
		useConntrack       = flag.Bool("conntrack", true, "also use conntrack to track connections")
		logPrefix          = flag.String("log.prefix", "<probe>", "prefix for each log line")
	)
	flag.Parse()

	if *printVersion {
		fmt.Println(version)
		return
	}

	if !strings.HasSuffix(*logPrefix, " ") {
		*logPrefix += " "
	}
	log.SetPrefix(*logPrefix)

	defer log.Print("probe exiting")

	if *spyProcs && os.Getegid() != 0 {
		log.Printf("warning: -process=true, but that requires root to find everything")
	}

	var (
		hostName = hostname()
		hostID   = hostName // TODO(pb): we should sanitize the hostname
		probeID  = hostName // TODO(pb): does this need to be a random string instead?
	)
	log.Printf("probe starting, version %s, ID %s", version, probeID)

	addrs, err := net.InterfaceAddrs()
	if err != nil {
		log.Fatal(err)
	}
	localNets := report.Networks{}
	for _, addr := range addrs {
		// Not all addrs are IPNets.
		if ipNet, ok := addr.(*net.IPNet); ok {
			localNets = append(localNets, ipNet)
		}
	}

	if len(flag.Args()) > 0 {
		targets = flag.Args()
	}
	log.Printf("publishing to: %s", strings.Join(targets, ", "))

	factory := func(endpoint string) (string, xfer.Publisher, error) {
		id, publisher, err := xfer.NewHTTPPublisher(endpoint, *token, probeID)
		if err != nil {
			return "", nil, err
		}
		return id, xfer.NewBackgroundPublisher(publisher), nil
	}

	publishers := xfer.NewMultiPublisher(factory)
	defer publishers.Stop()

	resolver := newStaticResolver(targets, publishers.Set)
	defer resolver.Stop()

	endpointReporter := endpoint.NewReporter(hostID, hostName, *spyProcs, *useConntrack)
	defer endpointReporter.Stop()

	processCache := process.NewCachingWalker(process.NewWalker(*procRoot))

	var (
		tickers   = []Ticker{processCache}
		reporters = []Reporter{endpointReporter, host.NewReporter(hostID, hostName, localNets), process.NewReporter(processCache, hostID)}
		taggers   = []Tagger{newTopologyTagger(), host.NewTagger(hostID)}
	)

	dockerTagger, dockerReporter, dockerRegistry := func() (*docker.Tagger, *docker.Reporter, docker.Registry) {
		if !*dockerEnabled {
			return nil, nil, nil
		}
		if err := report.AddLocalBridge(*dockerBridge); err != nil {
			log.Printf("Docker: problem with bridge %s: %v", *dockerBridge, err)
			return nil, nil, nil
		}
		registry, err := docker.NewRegistry(*dockerInterval)
		if err != nil {
			log.Printf("Docker: failed to start registry: %v", err)
			return nil, nil, nil
		}
		return docker.NewTagger(registry, processCache), docker.NewReporter(registry, hostID), registry
	}()
	if dockerTagger != nil {
		taggers = append(taggers, dockerTagger)
	}
	if dockerReporter != nil {
		reporters = append(reporters, dockerReporter)
	}
	if dockerRegistry != nil {
		defer dockerRegistry.Stop()
	}

	if *weaveRouterAddr != "" {
		weave := overlay.NewWeave(hostID, *weaveRouterAddr)
		tickers = append(tickers, weave)
		taggers = append(taggers, weave)
		reporters = append(reporters, weave)
	}

	if *httpListen != "" {
		go func() {
			log.Printf("Profiling data being exported to %s", *httpListen)
			log.Printf("go tool pprof http://%s/debug/pprof/{profile,heap,block}", *httpListen)
			if *prometheusEndpoint != "" {
				log.Printf("exposing Prometheus endpoint at %s%s", *httpListen, *prometheusEndpoint)
				http.Handle(*prometheusEndpoint, makePrometheusHandler())
			}
			log.Printf("Profiling endpoint %s terminated: %v", *httpListen, http.ListenAndServe(*httpListen, nil))
		}()
	}

	quit, done := make(chan struct{}), sync.WaitGroup{}
	done.Add(2)
	defer func() { done.Wait() }() // second, wait for the main loops to be killed
	defer close(quit)              // first, kill the main loops

	var rpt syncReport
	rpt.swap(report.MakeReport())

	go func() {
		defer done.Done()
		spyTick := time.Tick(*spyInterval)

		for {
			select {
			case <-spyTick:
				start := time.Now()
				for _, ticker := range tickers {
					if err := ticker.Tick(); err != nil {
						log.Printf("error doing ticker: %v", err)
					}
				}

				localReport := rpt.copy()
				localReport = localReport.Merge(doReport(reporters))
				localReport = Apply(localReport, taggers)
				rpt.swap(localReport)

				if took := time.Since(start); took > *spyInterval {
					log.Printf("report generation took too long (%s)", took)
				}

			case <-quit:
				return
			}
		}
	}()

	go func() {
		defer done.Done()
		var (
			pubTick = time.Tick(*publishInterval)
			p       = xfer.NewReportPublisher(publishers)
		)

		for {
			select {
			case <-pubTick:
				publishTicks.WithLabelValues().Add(1)
				localReport := rpt.swap(report.MakeReport())
				localReport.Window = *publishInterval
				if err := p.Publish(localReport); err != nil {
					log.Printf("publish: %v", err)
				}

			case <-quit:
				return
			}
		}
	}()

	log.Printf("%s", <-interrupt())
}
Example #5
0
func main() {
	var (
		targets            = []string{fmt.Sprintf("localhost:%d", xfer.AppPort), fmt.Sprintf("scope.weave.local:%d", xfer.AppPort)}
		token              = flag.String("token", "default-token", "probe token")
		httpListen         = flag.String("http.listen", "", "listen address for HTTP profiling and instrumentation server")
		publishInterval    = flag.Duration("publish.interval", 3*time.Second, "publish (output) interval")
		spyInterval        = flag.Duration("spy.interval", time.Second, "spy (scan) interval")
		prometheusEndpoint = flag.String("prometheus.endpoint", "/metrics", "Prometheus metrics exposition endpoint (requires -http.listen)")
		spyProcs           = flag.Bool("processes", true, "report processes (needs root)")
		dockerEnabled      = flag.Bool("docker", false, "collect Docker-related attributes for processes")
		dockerInterval     = flag.Duration("docker.interval", 10*time.Second, "how often to update Docker attributes")
		dockerBridge       = flag.String("docker.bridge", "docker0", "the docker bridge name")
		weaveRouterAddr    = flag.String("weave.router.addr", "", "IP address or FQDN of the Weave router")
		procRoot           = flag.String("proc.root", "/proc", "location of the proc filesystem")
		captureEnabled     = flag.Bool("capture", false, "perform sampled packet capture")
		captureInterfaces  = flag.String("capture.interfaces", interfaces(), "packet capture on these interfaces")
		captureOn          = flag.Duration("capture.on", 1*time.Second, "packet capture duty cycle 'on'")
		captureOff         = flag.Duration("capture.off", 5*time.Second, "packet capture duty cycle 'off'")
		printVersion       = flag.Bool("version", false, "print version number and exit")
		useConntrack       = flag.Bool("conntrack", true, "also use conntrack to track connections")
	)
	flag.Parse()

	if *printVersion {
		fmt.Println(version)
		return
	}

	var (
		hostName = hostname()
		hostID   = hostName // TODO: we should sanitize the hostname
		probeID  = hostName // TODO: does this need to be a random string instead?
	)
	log.Printf("probe starting, version %s, ID %s", version, probeID)

	if len(flag.Args()) > 0 {
		targets = flag.Args()
	}
	log.Printf("publishing to: %s", strings.Join(targets, ", "))

	procspy.SetProcRoot(*procRoot)

	if *httpListen != "" {
		log.Printf("profiling data being exported to %s", *httpListen)
		log.Printf("go tool pprof http://%s/debug/pprof/{profile,heap,block}", *httpListen)
		if *prometheusEndpoint != "" {
			log.Printf("exposing Prometheus endpoint at %s%s", *httpListen, *prometheusEndpoint)
			http.Handle(*prometheusEndpoint, makePrometheusHandler())
		}
		go func() {
			err := http.ListenAndServe(*httpListen, nil)
			log.Print(err)
		}()
	}

	if *spyProcs && os.Getegid() != 0 {
		log.Printf("warning: process reporting enabled, but that requires root to find everything")
	}

	publisherFactory := func(target string) (xfer.Publisher, error) { return xfer.NewHTTPPublisher(target, *token, probeID) }
	publishers := xfer.NewMultiPublisher(publisherFactory)
	resolver := newStaticResolver(targets, publishers.Add)
	defer resolver.Stop()

	addrs, err := net.InterfaceAddrs()
	if err != nil {
		log.Fatal(err)
	}
	localNets := report.Networks{}
	for _, addr := range addrs {
		// Not all addrs are IPNets.
		if ipNet, ok := addr.(*net.IPNet); ok {
			localNets = append(localNets, ipNet)
		}
	}

	var (
		endpointReporter = endpoint.NewReporter(hostID, hostName, *spyProcs, *useConntrack)
		processCache     = process.NewCachingWalker(process.NewWalker(*procRoot))
		reporters        = []Reporter{
			endpointReporter,
			host.NewReporter(hostID, hostName, localNets),
			process.NewReporter(processCache, hostID),
		}
		taggers = []Tagger{newTopologyTagger(), host.NewTagger(hostID)}
	)
	defer endpointReporter.Stop()

	if *dockerEnabled {
		if err := report.AddLocalBridge(*dockerBridge); err != nil {
			log.Fatalf("failed to get docker bridge address: %v", err)
		}

		dockerRegistry, err := docker.NewRegistry(*dockerInterval)
		if err != nil {
			log.Fatalf("failed to start docker registry: %v", err)
		}
		defer dockerRegistry.Stop()

		taggers = append(taggers, docker.NewTagger(dockerRegistry, processCache))
		reporters = append(reporters, docker.NewReporter(dockerRegistry, hostID))
	}

	if *weaveRouterAddr != "" {
		weave, err := overlay.NewWeave(hostID, *weaveRouterAddr)
		if err != nil {
			log.Fatalf("failed to start Weave tagger: %v", err)
		}
		taggers = append(taggers, weave)
		reporters = append(reporters, weave)
	}

	if *captureEnabled {
		var sniffers int
		for _, iface := range strings.Split(*captureInterfaces, ",") {
			source, err := sniff.NewSource(iface)
			if err != nil {
				log.Printf("warning: %v", err)
				continue
			}
			defer source.Close()
			log.Printf("capturing packets on %s", iface)
			reporters = append(reporters, sniff.New(hostID, localNets, source, *captureOn, *captureOff))
			sniffers++
		}
		// Packet capture can block OS threads on Linux, so we need to provide
		// sufficient overhead in GOMAXPROCS.
		if have, want := runtime.GOMAXPROCS(-1), (sniffers + 1); have < want {
			runtime.GOMAXPROCS(want)
		}
	}

	quit := make(chan struct{})
	defer close(quit)
	go func() {
		var (
			pubTick = time.Tick(*publishInterval)
			spyTick = time.Tick(*spyInterval)
			r       = report.MakeReport()
		)

		for {
			select {
			case <-pubTick:
				publishTicks.WithLabelValues().Add(1)
				r.Window = *publishInterval
				if err := publishers.Publish(r); err != nil {
					log.Printf("publish: %v", err)
				}
				r = report.MakeReport()

			case <-spyTick:
				if err := processCache.Update(); err != nil {
					log.Printf("error reading processes: %v", err)
				}
				for _, reporter := range reporters {
					newReport, err := reporter.Report()
					if err != nil {
						log.Printf("error generating report: %v", err)
					}
					r = r.Merge(newReport)
				}
				r = Apply(r, taggers)

			case <-quit:
				return
			}
		}
	}()
	log.Printf("%s", <-interrupt())
}