add meta packet statistics (#230)
This change add more metrics around "meta" (non "message" type packets). For lighthouse packets, we also record statistics around the specific lighthouse meta type. We don't keep statistics for the "message" type so that we don't slow down the fast path (and you can just look at metrics on the tun interface to find that information).
This commit is contained in:
Wade Simmons
GitHub
parent
3212b769d4
commit
b37a91cfbc
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@ -28,7 +28,7 @@ func Test_NewConnectionManagerTest(t *testing.T) {
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rawCertificateNoKey: []byte{},
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}
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lh := NewLightHouse(false, 0, []uint32{}, 1000, 0, &udpConn{}, false, 1)
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lh := NewLightHouse(false, 0, []uint32{}, 1000, 0, &udpConn{}, false, 1, false)
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ifce := &Interface{
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hostMap: hostMap,
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inside: &Tun{},
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@ -91,7 +91,7 @@ func Test_NewConnectionManagerTest2(t *testing.T) {
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rawCertificateNoKey: []byte{},
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}
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lh := NewLightHouse(false, 0, []uint32{}, 1000, 0, &udpConn{}, false, 1)
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lh := NewLightHouse(false, 0, []uint32{}, 1000, 0, &udpConn{}, false, 1, false)
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ifce := &Interface{
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hostMap: hostMap,
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inside: &Tun{},
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@ -177,6 +177,15 @@ logging:
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#subsystem: nebula
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#interval: 10s
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# enables counter metrics for meta packets
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# e.g.: `messages.tx.handshake`
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# NOTE: `message.{tx,rx}.recv_error` is always emitted
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#message_metrics: false
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# enables detailed counter metrics for lighthouse packets
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# e.g.: `lighthouse.rx.HostQuery`
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#lighthouse_metrics: false
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# Handshake Manger Settings
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#handshakes:
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# Total time to try a handshake = sequence of `try_interval * retries`
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@ -98,6 +98,7 @@ func ixHandshakeStage1(f *Interface, addr *udpAddr, hostinfo *HostInfo, packet [
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hostinfo, _ := f.handshakeManager.pendingHostMap.QueryReverseIndex(hs.Details.InitiatorIndex)
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if hostinfo != nil && bytes.Equal(hostinfo.HandshakePacket[0], packet[HeaderLen:]) {
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if msg, ok := hostinfo.HandshakePacket[2]; ok {
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f.messageMetrics.Tx(handshake, NebulaMessageSubType(msg[1]), 1)
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err := f.outside.WriteTo(msg, addr)
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if err != nil {
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l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
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@ -191,6 +192,7 @@ func ixHandshakeStage1(f *Interface, addr *udpAddr, hostinfo *HostInfo, packet [
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hostinfo.HandshakePacket[2] = make([]byte, len(msg))
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copy(hostinfo.HandshakePacket[2], msg)
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f.messageMetrics.Tx(handshake, NebulaMessageSubType(msg[1]), 1)
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err := f.outside.WriteTo(msg, addr)
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if err != nil {
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l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
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@ -31,6 +31,8 @@ type HandshakeConfig struct {
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tryInterval time.Duration
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retries int
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waitRotation int
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messageMetrics *MessageMetrics
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}
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type HandshakeManager struct {
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@ -42,6 +44,8 @@ type HandshakeManager struct {
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OutboundHandshakeTimer *SystemTimerWheel
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InboundHandshakeTimer *SystemTimerWheel
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messageMetrics *MessageMetrics
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}
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func NewHandshakeManager(tunCidr *net.IPNet, preferredRanges []*net.IPNet, mainHostMap *HostMap, lightHouse *LightHouse, outside *udpConn, config HandshakeConfig) *HandshakeManager {
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@ -55,6 +59,8 @@ func NewHandshakeManager(tunCidr *net.IPNet, preferredRanges []*net.IPNet, mainH
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OutboundHandshakeTimer: NewSystemTimerWheel(config.tryInterval, config.tryInterval*time.Duration(config.retries)),
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InboundHandshakeTimer: NewSystemTimerWheel(config.tryInterval, config.tryInterval*time.Duration(config.retries)),
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messageMetrics: config.messageMetrics,
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}
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}
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@ -111,6 +117,7 @@ func (c *HandshakeManager) NextOutboundHandshakeTimerTick(now time.Time, f EncWr
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// Ensure the handshake is ready to avoid a race in timer tick and stage 0 handshake generation
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if hostinfo.HandshakeReady && hostinfo.remote != nil {
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c.messageMetrics.Tx(handshake, NebulaMessageSubType(hostinfo.HandshakePacket[0][1]), 1)
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err := c.outside.WriteTo(hostinfo.HandshakePacket[0], hostinfo.remote)
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if err != nil {
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hostinfo.logger().WithField("udpAddr", hostinfo.remote).
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@ -30,6 +30,7 @@ type HostMap struct {
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vpnCIDR *net.IPNet
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defaultRoute uint32
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unsafeRoutes *CIDRTree
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metricsEnabled bool
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}
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type HostInfo struct {
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@ -384,8 +385,16 @@ func (hm *HostMap) PunchList() []*udpAddr {
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}
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func (hm *HostMap) Punchy(conn *udpConn) {
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var metricsTxPunchy metrics.Counter
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if hm.metricsEnabled {
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metricsTxPunchy = metrics.GetOrRegisterCounter("messages.tx.punchy", nil)
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} else {
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metricsTxPunchy = metrics.NilCounter{}
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}
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for {
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for _, addr := range hm.PunchList() {
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metricsTxPunchy.Inc(1)
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conn.WriteTo([]byte{1}, addr)
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}
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time.Sleep(time.Second * 30)
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@ -46,7 +46,7 @@ func (f *Interface) consumeInsidePacket(packet []byte, fwPacket *FirewallPacket,
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dropReason := f.firewall.Drop(packet, *fwPacket, false, hostinfo, trustedCAs)
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if dropReason == nil {
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f.send(message, 0, ci, hostinfo, hostinfo.remote, packet, nb, out)
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f.sendNoMetrics(message, 0, ci, hostinfo, hostinfo.remote, packet, nb, out)
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if f.lightHouse != nil && *ci.messageCounter%5000 == 0 {
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f.lightHouse.Query(fwPacket.RemoteIP, f)
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}
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@ -118,7 +118,7 @@ func (f *Interface) sendMessageNow(t NebulaMessageType, st NebulaMessageSubType,
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return
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}
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f.send(message, st, hostInfo.ConnectionState, hostInfo, hostInfo.remote, p, nb, out)
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f.sendNoMetrics(message, st, hostInfo.ConnectionState, hostInfo, hostInfo.remote, p, nb, out)
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if f.lightHouse != nil && *hostInfo.ConnectionState.messageCounter%5000 == 0 {
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f.lightHouse.Query(fp.RemoteIP, f)
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}
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@ -175,6 +175,11 @@ func (f *Interface) sendMessageToAll(t NebulaMessageType, st NebulaMessageSubTyp
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}
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func (f *Interface) send(t NebulaMessageType, st NebulaMessageSubType, ci *ConnectionState, hostinfo *HostInfo, remote *udpAddr, p, nb, out []byte) {
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f.messageMetrics.Tx(t, st, 1)
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f.sendNoMetrics(t, st, ci, hostinfo, remote, p, nb, out)
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}
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func (f *Interface) sendNoMetrics(t NebulaMessageType, st NebulaMessageSubType, ci *ConnectionState, hostinfo *HostInfo, remote *udpAddr, p, nb, out []byte) {
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if ci.eKey == nil {
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//TODO: log warning
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return
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@ -25,6 +25,7 @@ type InterfaceConfig struct {
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DropLocalBroadcast bool
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DropMulticast bool
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UDPBatchSize int
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MessageMetrics *MessageMetrics
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}
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type Interface struct {
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@ -45,9 +46,8 @@ type Interface struct {
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udpBatchSize int
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version string
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metricRxRecvError metrics.Counter
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metricTxRecvError metrics.Counter
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metricHandshakes metrics.Histogram
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messageMetrics *MessageMetrics
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}
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func NewInterface(c *InterfaceConfig) (*Interface, error) {
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@ -80,9 +80,8 @@ func NewInterface(c *InterfaceConfig) (*Interface, error) {
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dropMulticast: c.DropMulticast,
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udpBatchSize: c.UDPBatchSize,
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metricRxRecvError: metrics.GetOrRegisterCounter("messages.rx.recv_error", nil),
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metricTxRecvError: metrics.GetOrRegisterCounter("messages.tx.recv_error", nil),
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metricHandshakes: metrics.GetOrRegisterHistogram("handshakes", nil, metrics.NewExpDecaySample(1028, 0.015)),
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messageMetrics: c.MessageMetrics,
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}
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ifce.connectionManager = newConnectionManager(ifce, c.checkInterval, c.pendingDeletionInterval)
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@ -7,6 +7,7 @@ import (
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"time"
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"github.com/golang/protobuf/proto"
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"github.com/rcrowley/go-metrics"
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"github.com/slackhq/nebula/cert"
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)
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@ -37,6 +38,9 @@ type LightHouse struct {
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nebulaPort int
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punchBack bool
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punchDelay time.Duration
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metrics *MessageMetrics
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metricHolepunchTx metrics.Counter
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}
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type EncWriter interface {
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@ -44,7 +48,7 @@ type EncWriter interface {
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SendMessageToAll(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte)
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}
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func NewLightHouse(amLighthouse bool, myIp uint32, ips []uint32, interval int, nebulaPort int, pc *udpConn, punchBack bool, punchDelay time.Duration) *LightHouse {
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func NewLightHouse(amLighthouse bool, myIp uint32, ips []uint32, interval int, nebulaPort int, pc *udpConn, punchBack bool, punchDelay time.Duration, metricsEnabled bool) *LightHouse {
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h := LightHouse{
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amLighthouse: amLighthouse,
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myIp: myIp,
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@ -58,6 +62,14 @@ func NewLightHouse(amLighthouse bool, myIp uint32, ips []uint32, interval int, n
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punchDelay: punchDelay,
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}
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if metricsEnabled {
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h.metrics = newLighthouseMetrics()
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h.metricHolepunchTx = metrics.GetOrRegisterCounter("messages.tx.holepunch", nil)
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} else {
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h.metricHolepunchTx = metrics.NilCounter{}
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}
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for _, ip := range ips {
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h.lighthouses[ip] = struct{}{}
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}
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@ -111,6 +123,7 @@ func (lh *LightHouse) QueryServer(ip uint32, f EncWriter) {
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return
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}
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lh.metricTx(NebulaMeta_HostQuery, int64(len(lh.lighthouses)))
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nb := make([]byte, 12, 12)
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out := make([]byte, mtu)
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for n := range lh.lighthouses {
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@ -249,6 +262,7 @@ func (lh *LightHouse) LhUpdateWorker(f EncWriter) {
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},
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}
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lh.metricTx(NebulaMeta_HostUpdateNotification, int64(len(lh.lighthouses)))
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nb := make([]byte, 12, 12)
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out := make([]byte, mtu)
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for vpnIp := range lh.lighthouses {
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@ -281,6 +295,8 @@ func (lh *LightHouse) HandleRequest(rAddr *udpAddr, vpnIp uint32, p []byte, c *c
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return
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}
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lh.metricRx(n.Type, 1)
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switch n.Type {
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case NebulaMeta_HostQuery:
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// Exit if we don't answer queries
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@ -308,6 +324,7 @@ func (lh *LightHouse) HandleRequest(rAddr *udpAddr, vpnIp uint32, p []byte, c *c
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l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).Error("Failed to marshal lighthouse host query reply")
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return
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}
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lh.metricTx(NebulaMeta_HostQueryReply, 1)
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f.SendMessageToVpnIp(lightHouse, 0, vpnIp, reply, make([]byte, 12, 12), make([]byte, mtu))
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// This signals the other side to punch some zero byte udp packets
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@ -326,6 +343,7 @@ func (lh *LightHouse) HandleRequest(rAddr *udpAddr, vpnIp uint32, p []byte, c *c
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},
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}
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reply, _ := proto.Marshal(answer)
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lh.metricTx(NebulaMeta_HostPunchNotification, 1)
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f.SendMessageToVpnIp(lightHouse, 0, n.Details.VpnIp, reply, make([]byte, 12, 12), make([]byte, mtu))
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}
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//fmt.Println(reply, remoteaddr)
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@ -362,6 +380,7 @@ func (lh *LightHouse) HandleRequest(rAddr *udpAddr, vpnIp uint32, p []byte, c *c
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vpnPeer := NewUDPAddr(a.Ip, uint16(a.Port))
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go func() {
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time.Sleep(lh.punchDelay)
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lh.metricHolepunchTx.Inc(1)
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lh.punchConn.WriteTo(empty, vpnPeer)
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}()
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@ -380,6 +399,13 @@ func (lh *LightHouse) HandleRequest(rAddr *udpAddr, vpnIp uint32, p []byte, c *c
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}
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}
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func (lh *LightHouse) metricRx(t NebulaMeta_MessageType, i int64) {
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lh.metrics.Rx(NebulaMessageType(t), 0, i)
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}
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func (lh *LightHouse) metricTx(t NebulaMeta_MessageType, i int64) {
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lh.metrics.Tx(NebulaMessageType(t), 0, i)
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}
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/*
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func (f *Interface) sendPathCheck(ci *ConnectionState, endpoint *net.UDPAddr, counter int) {
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c := ci.messageCounter
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@ -52,7 +52,7 @@ func Test_lhStaticMapping(t *testing.T) {
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udpServer, _ := NewListener("0.0.0.0", 0, true)
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meh := NewLightHouse(true, 1, []uint32{ip2int(lh1IP)}, 10, 10003, udpServer, false, 1)
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meh := NewLightHouse(true, 1, []uint32{ip2int(lh1IP)}, 10, 10003, udpServer, false, 1, false)
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meh.AddRemote(ip2int(lh1IP), NewUDPAddr(ip2int(lh1IP), uint16(4242)), true)
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err := meh.ValidateLHStaticEntries()
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assert.Nil(t, err)
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@ -60,7 +60,7 @@ func Test_lhStaticMapping(t *testing.T) {
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lh2 := "10.128.0.3"
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lh2IP := net.ParseIP(lh2)
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meh = NewLightHouse(true, 1, []uint32{ip2int(lh1IP), ip2int(lh2IP)}, 10, 10003, udpServer, false, 1)
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meh = NewLightHouse(true, 1, []uint32{ip2int(lh1IP), ip2int(lh2IP)}, 10, 10003, udpServer, false, 1, false)
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meh.AddRemote(ip2int(lh1IP), NewUDPAddr(ip2int(lh1IP), uint16(4242)), true)
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err = meh.ValidateLHStaticEntries()
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assert.EqualError(t, err, "Lighthouse 10.128.0.3 does not have a static_host_map entry")
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12
main.go
12
main.go
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@ -172,6 +172,7 @@ func Main(configPath string, configTest bool, buildVersion string) {
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hostMap := NewHostMap("main", tunCidr, preferredRanges)
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hostMap.SetDefaultRoute(ip2int(net.ParseIP(config.GetString("default_route", "0.0.0.0"))))
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hostMap.addUnsafeRoutes(&unsafeRoutes)
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hostMap.metricsEnabled = config.GetBool("stats.message_metrics", false)
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l.WithField("network", hostMap.vpnCIDR).WithField("preferredRanges", hostMap.preferredRanges).Info("Main HostMap created")
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@ -226,6 +227,7 @@ func Main(configPath string, configTest bool, buildVersion string) {
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udpServer,
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punchy.Respond,
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punchy.Delay,
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config.GetBool("stats.lighthouse_metrics", false),
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)
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remoteAllowList, err := config.GetAllowList("lighthouse.remote_allow_list", false)
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@ -280,10 +282,19 @@ func Main(configPath string, configTest bool, buildVersion string) {
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l.WithError(err).Error("Lighthouse unreachable")
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}
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var messageMetrics *MessageMetrics
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if config.GetBool("stats.message_metrics", false) {
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messageMetrics = newMessageMetrics()
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} else {
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messageMetrics = newMessageMetricsOnlyRecvError()
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}
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handshakeConfig := HandshakeConfig{
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tryInterval: config.GetDuration("handshakes.try_interval", DefaultHandshakeTryInterval),
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retries: config.GetInt("handshakes.retries", DefaultHandshakeRetries),
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waitRotation: config.GetInt("handshakes.wait_rotation", DefaultHandshakeWaitRotation),
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messageMetrics: messageMetrics,
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}
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handshakeManager := NewHandshakeManager(tunCidr, preferredRanges, hostMap, lightHouse, udpServer, handshakeConfig)
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@ -310,6 +321,7 @@ func Main(configPath string, configTest bool, buildVersion string) {
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DropLocalBroadcast: config.GetBool("tun.drop_local_broadcast", false),
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DropMulticast: config.GetBool("tun.drop_multicast", false),
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UDPBatchSize: config.GetInt("listen.batch", 64),
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MessageMetrics: messageMetrics,
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}
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switch ifConfig.Cipher {
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@ -0,0 +1,97 @@
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package nebula
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import (
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"fmt"
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"github.com/rcrowley/go-metrics"
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)
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type MessageMetrics struct {
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rx [][]metrics.Counter
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tx [][]metrics.Counter
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rxUnknown metrics.Counter
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txUnknown metrics.Counter
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}
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func (m *MessageMetrics) Rx(t NebulaMessageType, s NebulaMessageSubType, i int64) {
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if m != nil {
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if t >= 0 && int(t) < len(m.rx) && s >= 0 && int(s) < len(m.rx[t]) {
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m.rx[t][s].Inc(i)
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} else if m.rxUnknown != nil {
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m.rxUnknown.Inc(i)
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}
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}
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}
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func (m *MessageMetrics) Tx(t NebulaMessageType, s NebulaMessageSubType, i int64) {
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if m != nil {
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if t >= 0 && int(t) < len(m.tx) && s >= 0 && int(s) < len(m.tx[t]) {
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m.tx[t][s].Inc(i)
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} else if m.txUnknown != nil {
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m.txUnknown.Inc(i)
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}
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}
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}
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func newMessageMetrics() *MessageMetrics {
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gen := func(t string) [][]metrics.Counter {
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return [][]metrics.Counter{
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{
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metrics.GetOrRegisterCounter(fmt.Sprintf("messages.%s.handshake_ixpsk0", t), nil),
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},
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nil,
|
||||
{metrics.GetOrRegisterCounter(fmt.Sprintf("messages.%s.recv_error", t), nil)},
|
||||
{metrics.GetOrRegisterCounter(fmt.Sprintf("messages.%s.lighthouse", t), nil)},
|
||||
{
|
||||
metrics.GetOrRegisterCounter(fmt.Sprintf("messages.%s.test_request", t), nil),
|
||||
metrics.GetOrRegisterCounter(fmt.Sprintf("messages.%s.test_response", t), nil),
|
||||
},
|
||||
{metrics.GetOrRegisterCounter(fmt.Sprintf("messages.%s.close_tunnel", t), nil)},
|
||||
}
|
||||
}
|
||||
return &MessageMetrics{
|
||||
rx: gen("rx"),
|
||||
tx: gen("tx"),
|
||||
|
||||
rxUnknown: metrics.GetOrRegisterCounter("messages.rx.other", nil),
|
||||
txUnknown: metrics.GetOrRegisterCounter("messages.tx.other", nil),
|
||||
}
|
||||
}
|
||||
|
||||
// Historically we only recorded recv_error, so this is backwards compat
|
||||
func newMessageMetricsOnlyRecvError() *MessageMetrics {
|
||||
gen := func(t string) [][]metrics.Counter {
|
||||
return [][]metrics.Counter{
|
||||
nil,
|
||||
nil,
|
||||
{metrics.GetOrRegisterCounter(fmt.Sprintf("messages.%s.recv_error", t), nil)},
|
||||
}
|
||||
}
|
||||
return &MessageMetrics{
|
||||
rx: gen("rx"),
|
||||
tx: gen("tx"),
|
||||
}
|
||||
}
|
||||
|
||||
func newLighthouseMetrics() *MessageMetrics {
|
||||
gen := func(t string) [][]metrics.Counter {
|
||||
h := make([][]metrics.Counter, len(NebulaMeta_MessageType_name))
|
||||
used := []NebulaMeta_MessageType{
|
||||
NebulaMeta_HostQuery,
|
||||
NebulaMeta_HostQueryReply,
|
||||
NebulaMeta_HostUpdateNotification,
|
||||
NebulaMeta_HostPunchNotification,
|
||||
}
|
||||
for _, i := range used {
|
||||
h[i] = []metrics.Counter{metrics.GetOrRegisterCounter(fmt.Sprintf("lighthouse.%s.%s", t, i.String()), nil)}
|
||||
}
|
||||
return h
|
||||
}
|
||||
return &MessageMetrics{
|
||||
rx: gen("rx"),
|
||||
tx: gen("tx"),
|
||||
|
||||
rxUnknown: metrics.GetOrRegisterCounter("lighthouse.rx.other", nil),
|
||||
txUnknown: metrics.GetOrRegisterCounter("lighthouse.tx.other", nil),
|
||||
}
|
||||
}
|
||||
10
outside.go
10
outside.go
|
|
@ -54,6 +54,7 @@ func (f *Interface) readOutsidePackets(addr *udpAddr, out []byte, packet []byte,
|
|||
// Fallthrough to the bottom to record incoming traffic
|
||||
|
||||
case lightHouse:
|
||||
f.messageMetrics.Rx(header.Type, header.Subtype, 1)
|
||||
if !f.handleEncrypted(ci, addr, header) {
|
||||
return
|
||||
}
|
||||
|
|
@ -74,6 +75,7 @@ func (f *Interface) readOutsidePackets(addr *udpAddr, out []byte, packet []byte,
|
|||
// Fallthrough to the bottom to record incoming traffic
|
||||
|
||||
case test:
|
||||
f.messageMetrics.Rx(header.Type, header.Subtype, 1)
|
||||
if !f.handleEncrypted(ci, addr, header) {
|
||||
return
|
||||
}
|
||||
|
|
@ -102,15 +104,18 @@ func (f *Interface) readOutsidePackets(addr *udpAddr, out []byte, packet []byte,
|
|||
// are unauthenticated
|
||||
|
||||
case handshake:
|
||||
f.messageMetrics.Rx(header.Type, header.Subtype, 1)
|
||||
HandleIncomingHandshake(f, addr, packet, header, hostinfo)
|
||||
return
|
||||
|
||||
case recvError:
|
||||
f.messageMetrics.Rx(header.Type, header.Subtype, 1)
|
||||
// TODO: Remove this with recv_error deprecation
|
||||
f.handleRecvError(addr, header)
|
||||
return
|
||||
|
||||
case closeTunnel:
|
||||
f.messageMetrics.Rx(header.Type, header.Subtype, 1)
|
||||
if !f.handleEncrypted(ci, addr, header) {
|
||||
return
|
||||
}
|
||||
|
|
@ -122,6 +127,7 @@ func (f *Interface) readOutsidePackets(addr *udpAddr, out []byte, packet []byte,
|
|||
return
|
||||
|
||||
default:
|
||||
f.messageMetrics.Rx(header.Type, header.Subtype, 1)
|
||||
hostinfo.logger().Debugf("Unexpected packet received from %s", addr)
|
||||
return
|
||||
}
|
||||
|
|
@ -298,7 +304,7 @@ func (f *Interface) decryptToTun(hostinfo *HostInfo, messageCounter uint64, out
|
|||
}
|
||||
|
||||
func (f *Interface) sendRecvError(endpoint *udpAddr, index uint32) {
|
||||
f.metricTxRecvError.Inc(1)
|
||||
f.messageMetrics.Tx(recvError, 0, 1)
|
||||
|
||||
//TODO: this should be a signed message so we can trust that we should drop the index
|
||||
b := HeaderEncode(make([]byte, HeaderLen), Version, uint8(recvError), 0, index, 0)
|
||||
|
|
@ -311,8 +317,6 @@ func (f *Interface) sendRecvError(endpoint *udpAddr, index uint32) {
|
|||
}
|
||||
|
||||
func (f *Interface) handleRecvError(addr *udpAddr, h *Header) {
|
||||
f.metricRxRecvError.Inc(1)
|
||||
|
||||
// This flag is to stop caring about recv_error from old versions
|
||||
// This should go away when the old version is gone from prod
|
||||
if l.Level >= logrus.DebugLevel {
|
||||
|
|
|
|||
Loading…
Reference in New Issue