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Code Issues Releases Activity

Cleanup and speedup network convergence along with direct messaging for connect and solicit

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This commit is contained in:
Asim Aslam 2019-12-07 19:54:29 +00:00
parent 1d8c66780e
commit c445aed6b1
17 changed files with 494 additions and 199 deletions
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40
client/rpc_client.go
View File

@ -316,6 +316,22 @@ func (r *rpcClient) Options() Options {
return r.opts
}
// hasProxy checks if we have proxy set in the environment
func (r *rpcClient) hasProxy() bool {
// get proxy
if prx := os.Getenv("MICRO_PROXY"); len(prx) > 0 {
return true
}
// get proxy address
if prx := os.Getenv("MICRO_PROXY_ADDRESS"); len(prx) > 0 {
return true
}
return false
}
// next returns an iterator for the next nodes to call
func (r *rpcClient) next(request Request, opts CallOptions) (selector.Next, error) {
service := request.Service()
@ -431,10 +447,18 @@ func (r *rpcClient) Call(ctx context.Context, request Request, response interfac
return err
}
ch := make(chan error, callOpts.Retries+1)
// get the retries
retries := callOpts.Retries
// disable retries when using a proxy
if r.hasProxy() {
retries = 0
}
ch := make(chan error, retries+1)
var gerr error
for i := 0; i <= callOpts.Retries; i++ {
for i := 0; i <= retries; i++ {
go func(i int) {
ch <- call(i)
}(i)
@ -514,10 +538,18 @@ func (r *rpcClient) Stream(ctx context.Context, request Request, opts ...CallOpt
err error
}
ch := make(chan response, callOpts.Retries+1)
// get the retries
retries := callOpts.Retries
// disable retries when using a proxy
if r.hasProxy() {
retries = 0
}
ch := make(chan response, retries+1)
var grr error
for i := 0; i <= callOpts.Retries; i++ {
for i := 0; i <= retries; i++ {
go func(i int) {
s, err := call(i)
ch <- response{s, err}

27
client/rpc_codec.go
View File

@ -88,32 +88,24 @@ func (rwc *readWriteCloser) Close() error {
}
func getHeaders(m *codec.Message) {
get := func(hdr string) string {
if hd := m.Header[hdr]; len(hd) > 0 {
return hd
set := func(v, hdr string) string {
if len(v) > 0 {
return v
}
// old
return m.Header["X-"+hdr]
return m.Header[hdr]
}
// check error in header
if len(m.Error) == 0 {
m.Error = get("Micro-Error")
}
m.Error = set(m.Error, "Micro-Error")
// check endpoint in header
if len(m.Endpoint) == 0 {
m.Endpoint = get("Micro-Endpoint")
}
m.Endpoint = set(m.Endpoint, "Micro-Endpoint")
// check method in header
if len(m.Method) == 0 {
m.Method = get("Micro-Method")
}
m.Method = set(m.Method, "Micro-Method")
if len(m.Id) == 0 {
m.Id = get("Micro-Id")
}
// set the request id
m.Id = set(m.Id, "Micro-Id")
}
func setHeaders(m *codec.Message, stream string) {
@ -122,7 +114,6 @@ func setHeaders(m *codec.Message, stream string) {
return
}
m.Header[hdr] = v
m.Header["X-"+hdr] = v
}
set("Micro-Id", m.Id)

392
network/default.go
View File

@ -71,9 +71,18 @@ type network struct {
connected bool
// closed closes the network
closed chan bool
// whether we've announced the first connect successfully
// and received back some sort of peer message
announced chan bool
// whether we've discovered by the network
discovered chan bool
// solicted checks whether routes were solicited by one node
solicited chan string
}
// message is network message
type message struct {
// msg is transport message
msg *transport.Message
// session is tunnel session
session tunnel.Session
}
// newNetwork returns a new network node
@ -157,6 +166,8 @@ func newNetwork(opts ...Option) Network {
client: client,
tunClient: make(map[string]transport.Client),
peerLinks: make(map[string]tunnel.Link),
discovered: make(chan bool, 1),
solicited: make(chan string, 1),
}
network.node.network = network
@ -278,6 +289,14 @@ func (n *network) handleNetConn(s tunnel.Session, msg chan *message) {
continue
}
// check if peer is set
peer := m.Header["Micro-Peer"]
// check who the message is intended for
if len(peer) > 0 && peer != n.options.Id {
continue
}
select {
case msg <- &message{
msg: m,
@ -367,26 +386,33 @@ func (n *network) processNetChan(listener tunnel.Listener) {
// mark the time the message has been received
now := time.Now()
pbNetConnect := &pbNet.Connect{}
if err := proto.Unmarshal(m.msg.Body, pbNetConnect); err != nil {
log.Debugf("Network tunnel [%s] connect unmarshal error: %v", NetworkChannel, err)
continue
}
// don't process your own messages
if pbNetConnect.Node.Id == n.options.Id {
continue
}
log.Debugf("Network received connect message from: %s", pbNetConnect.Node.Id)
peer := &node{
id: pbNetConnect.Node.Id,
address: pbNetConnect.Node.Address,
peers: make(map[string]*node),
lastSeen: now,
}
// update peer links
log.Tracef("Network updating peer link %s for peer: %s", m.session.Link(), pbNetConnect.Node.Address)
if err := n.updatePeerLinks(pbNetConnect.Node.Address, m.session.Link()); err != nil {
log.Debugf("Network failed updating peer links: %s", err)
}
// add peer to the list of node peers
if err := n.node.AddPeer(peer); err == ErrPeerExists {
log.Debugf("Network peer exists, refreshing: %s", peer.id)
@ -394,50 +420,76 @@ func (n *network) processNetChan(listener tunnel.Listener) {
if err := n.RefreshPeer(peer.id, now); err != nil {
log.Debugf("Network failed refreshing peer %s: %v", peer.id, err)
}
continue
}
// we send the peer message because someone has sent connect
// and wants to know what's on the network. The faster we
// respond the faster we start to converge
// get node peers down to MaxDepth encoded in protobuf
msg := PeersToProto(n.node, MaxDepth)
node := pbNetConnect.Node.Id
// advertise yourself to the network
if err := n.sendMsg("peer", msg, NetworkChannel); err != nil {
if err := n.sendTo("peer", NetworkChannel, node, msg); err != nil {
log.Debugf("Network failed to advertise peers: %v", err)
}
// advertise all the routes when a new node has connected
if err := n.router.Solicit(); err != nil {
log.Debugf("Network failed to solicit routes: %s", err)
}
// specify that we're soliciting
select {
case n.solicited <- node:
default:
// don't block
}
case "peer":
// mark the time the message has been received
now := time.Now()
pbNetPeer := &pbNet.Peer{}
if err := proto.Unmarshal(m.msg.Body, pbNetPeer); err != nil {
log.Debugf("Network tunnel [%s] peer unmarshal error: %v", NetworkChannel, err)
continue
}
// don't process your own messages
if pbNetPeer.Node.Id == n.options.Id {
continue
}
log.Debugf("Network received peer message from: %s %s", pbNetPeer.Node.Id, pbNetPeer.Node.Address)
peer := &node{
id: pbNetPeer.Node.Id,
address: pbNetPeer.Node.Address,
peers: make(map[string]*node),
lastSeen: now,
}
// update peer links
log.Tracef("Network updating peer link %s for peer: %s", m.session.Link(), pbNetPeer.Node.Address)
if err := n.updatePeerLinks(pbNetPeer.Node.Address, m.session.Link()); err != nil {
log.Debugf("Network failed updating peer links: %s", err)
}
if err := n.node.AddPeer(peer); err == nil {
// send a solicit message when discovering new peer
msg := &pbRtr.Solicit{
Id: n.options.Id,
}
if err := n.sendMsg("solicit", msg, ControlChannel); err != nil {
node := pbNetPeer.Node.Id
// only solicit this peer
if err := n.sendTo("solicit", ControlChannel, node, msg); err != nil {
log.Debugf("Network failed to send solicit message: %s", err)
}
continue
// we're expecting any error to be ErrPeerExists
} else if err != ErrPeerExists {
@ -446,6 +498,7 @@ func (n *network) processNetChan(listener tunnel.Listener) {
}
log.Debugf("Network peer exists, refreshing: %s", pbNetPeer.Node.Id)
// update lastSeen time for the peer
if err := n.RefreshPeer(pbNetPeer.Node.Id, now); err != nil {
log.Debugf("Network failed refreshing peer %s: %v", pbNetPeer.Node.Id, err)
@ -458,12 +511,12 @@ func (n *network) processNetChan(listener tunnel.Listener) {
log.Debugf("Network failed to update peers: %v", err)
}
// check if we announced and were discovered
// tell the connect loop that we've been discovered
// so it stops sending connect messages out
select {
case <-n.announced:
// we've sent the connect and received this response
case n.discovered <- true:
default:
close(n.announced)
// don't block here
}
case "close":
pbNetClose := &pbNet.Close{}
@ -471,22 +524,28 @@ func (n *network) processNetChan(listener tunnel.Listener) {
log.Debugf("Network tunnel [%s] close unmarshal error: %v", NetworkChannel, err)
continue
}
// don't process your own messages
if pbNetClose.Node.Id == n.options.Id {
continue
}
log.Debugf("Network received close message from: %s", pbNetClose.Node.Id)
peer := &node{
id: pbNetClose.Node.Id,
address: pbNetClose.Node.Address,
}
if err := n.DeletePeerNode(peer.id); err != nil {
log.Debugf("Network failed to delete node %s routes: %v", peer.id, err)
}
if err := n.prunePeerRoutes(peer); err != nil {
log.Debugf("Network failed pruning peer %s routes: %v", peer.id, err)
}
// deelete peer from the peerLinks
// delete peer from the peerLinks
n.Lock()
delete(n.peerLinks, pbNetClose.Node.Address)
n.Unlock()
@ -497,57 +556,6 @@ func (n *network) processNetChan(listener tunnel.Listener) {
}
}
// sendMsg sends a message to the tunnel channel
func (n *network) sendMsg(method string, msg proto.Message, channel string) error {
body, err := proto.Marshal(msg)
if err != nil {
return err
}
// create transport message and chuck it down the pipe
m := transport.Message{
Header: map[string]string{
"Micro-Method": method,
},
Body: body,
}
// check if the channel client is initialized
n.RLock()
client, ok := n.tunClient[channel]
if !ok || client == nil {
n.RUnlock()
return ErrClientNotFound
}
n.RUnlock()
log.Debugf("Network sending %s message from: %s", method, n.options.Id)
if err := client.Send(&m); err != nil {
return err
}
return nil
}
// announce announces node peers to the network
func (n *network) announce(client transport.Client) {
announce := time.NewTicker(AnnounceTime)
defer announce.Stop()
for {
select {
case <-n.closed:
return
case <-announce.C:
msg := PeersToProto(n.node, MaxDepth)
// advertise yourself to the network
if err := n.sendMsg("peer", msg, NetworkChannel); err != nil {
log.Debugf("Network failed to advertise peers: %v", err)
continue
}
}
}
}
// pruneRoutes prunes routes return by given query
func (n *network) pruneRoutes(q ...router.QueryOption) error {
routes, err := n.router.Table().Query(q...)
@ -585,9 +593,12 @@ func (n *network) prunePeerRoutes(peer *node) error {
return nil
}
// prune deltes node peers that have not been seen for longer than PruneTime seconds
// prune also removes all the routes either originated by or routable by the stale nodes
func (n *network) prune() {
// manage the process of announcing to peers and prune any peer nodes that have not been
// seen for a period of time. Also removes all the routes either originated by or routable
//by the stale nodes
func (n *network) manage() {
announce := time.NewTicker(AnnounceTime)
defer announce.Stop()
prune := time.NewTicker(PruneTime)
defer prune.Stop()
@ -595,8 +606,14 @@ func (n *network) prune() {
select {
case <-n.closed:
return
case <-announce.C:
msg := PeersToProto(n.node, MaxDepth)
// advertise yourself to the network
if err := n.sendMsg("peer", NetworkChannel, msg); err != nil {
log.Debugf("Network failed to advertise peers: %v", err)
}
case <-prune.C:
pruned := n.PruneStalePeerNodes(PruneTime)
pruned := n.PruneStalePeers(PruneTime)
for id, peer := range pruned {
log.Debugf("Network peer exceeded prune time: %s", id)
n.Lock()
@ -606,19 +623,31 @@ func (n *network) prune() {
log.Debugf("Network failed pruning peer %s routes: %v", id, err)
}
}
// get a list of all routes
routes, err := n.options.Router.Table().List()
if err != nil {
log.Debugf("Network failed listing routes when pruning peers: %v", err)
continue
}
// collect all the router IDs in the routing table
routers := make(map[string]bool)
for _, route := range routes {
if _, ok := routers[route.Router]; !ok {
// check if its been processed
if _, ok := routers[route.Router]; ok {
continue
}
// mark as processed
routers[route.Router] = true
// if the router is NOT in our peer graph, delete all routes originated by it
if peerNode := n.node.GetPeerNode(route.Router); peerNode == nil {
if peer := n.node.GetPeerNode(route.Router); peer != nil {
continue
}
if err := n.pruneRoutes(router.QueryRouter(route.Router)); err != nil {
log.Debugf("Network failed deleting routes by %s: %v", route.Router, err)
}
@ -626,7 +655,56 @@ func (n *network) prune() {
}
}
}
// sendTo sends a message to a specific node as a one off.
// we need this because when links die, we have no discovery info,
// and sending to an existing multicast link doesn't immediately work
func (n *network) sendTo(method, channel, peer string, msg proto.Message) error {
body, err := proto.Marshal(msg)
if err != nil {
return err
}
c, err := n.tunnel.Dial(channel, tunnel.DialMode(tunnel.Multicast))
if err != nil {
return err
}
defer c.Close()
log.Debugf("Network sending %s message from: %s to %s", method, n.options.Id, peer)
return c.Send(&transport.Message{
Header: map[string]string{
"Micro-Method": method,
"Micro-Peer": peer,
},
Body: body,
})
}
// sendMsg sends a message to the tunnel channel
func (n *network) sendMsg(method, channel string, msg proto.Message) error {
body, err := proto.Marshal(msg)
if err != nil {
return err
}
// check if the channel client is initialized
n.RLock()
client, ok := n.tunClient[channel]
if !ok || client == nil {
n.RUnlock()
return ErrClientNotFound
}
n.RUnlock()
log.Debugf("Network sending %s message from: %s", method, n.options.Id)
return client.Send(&transport.Message{
Header: map[string]string{
"Micro-Method": method,
},
Body: body,
})
}
// handleCtrlConn handles ControlChannel connections
@ -642,6 +720,14 @@ func (n *network) handleCtrlConn(s tunnel.Session, msg chan *message) {
continue
}
// check if peer is set
peer := m.Header["Micro-Peer"]
// check who the message is intended for
if len(peer) > 0 && peer != n.options.Id {
continue
}
select {
case msg <- &message{
msg: m,
@ -770,15 +856,19 @@ func (n *network) processCtrlChan(listener tunnel.Listener) {
switch m.msg.Header["Micro-Method"] {
case "advert":
pbRtrAdvert := &pbRtr.Advert{}
if err := proto.Unmarshal(m.msg.Body, pbRtrAdvert); err != nil {
log.Debugf("Network fail to unmarshal advert message: %v", err)
continue
}
// don't process your own messages
if pbRtrAdvert.Id == n.options.Id {
continue
}
log.Debugf("Network received advert message from: %s", pbRtrAdvert.Id)
// loookup advertising node in our peer topology
advertNode := n.node.GetPeerNode(pbRtrAdvert.Id)
if advertNode == nil {
@ -788,6 +878,7 @@ func (n *network) processCtrlChan(listener tunnel.Listener) {
}
var events []*router.Event
for _, event := range pbRtrAdvert.Events {
// we know the advertising node is not the origin of the route
if pbRtrAdvert.Id != event.Route.Router {
@ -798,6 +889,7 @@ func (n *network) processCtrlChan(listener tunnel.Listener) {
continue
}
}
route := router.Route{
Service: event.Route.Service,
Address: event.Route.Address,
@ -807,6 +899,7 @@ func (n *network) processCtrlChan(listener tunnel.Listener) {
Link: event.Route.Link,
Metric: event.Route.Metric,
}
// calculate route metric and add to the advertised metric
// we need to make sure we do not overflow math.MaxInt64
metric := n.getRouteMetric(event.Route.Router, event.Route.Gateway, event.Route.Link)
@ -829,11 +922,13 @@ func (n *network) processCtrlChan(listener tunnel.Listener) {
}
events = append(events, e)
}
// if no events are eligible for processing continue
if len(events) == 0 {
log.Tracef("Network no events to be processed by router: %s", n.options.Id)
continue
}
// create an advert and process it
advert := &router.Advert{
Id: pbRtrAdvert.Id,
@ -853,16 +948,27 @@ func (n *network) processCtrlChan(listener tunnel.Listener) {
log.Debugf("Network fail to unmarshal solicit message: %v", err)
continue
}
log.Debugf("Network received solicit message from: %s", pbRtrSolicit.Id)
// ignore solicitation when requested by you
if pbRtrSolicit.Id == n.options.Id {
continue
}
log.Debugf("Network router flushing routes for: %s", pbRtrSolicit.Id)
// advertise all the routes when a new node has connected
if err := n.router.Solicit(); err != nil {
log.Debugf("Network failed to solicit routes: %s", err)
}
// specify that someone solicited the route
select {
case n.solicited <- pbRtrSolicit.Id:
default:
// don't block
}
}
case <-n.closed:
return
@ -879,6 +985,7 @@ func (n *network) advertise(advertChan <-chan *router.Advert) {
case advert := <-advertChan:
// create a proto advert
var events []*pbRtr.Event
for _, event := range advert.Events {
// the routes service address
address := event.Route.Address
@ -912,16 +1019,33 @@ func (n *network) advertise(advertChan <-chan *router.Advert) {
}
events = append(events, e)
}
msg := &pbRtr.Advert{
Id: advert.Id,
Type: pbRtr.AdvertType(advert.Type),
Timestamp: advert.Timestamp.UnixNano(),
Events: events,
}
if err := n.sendMsg("advert", msg, ControlChannel); err != nil {
// send the advert to all on the control channel
// since its not a solicitation
if advert.Type != router.Solicitation {
if err := n.sendMsg("advert", ControlChannel, msg); err != nil {
log.Debugf("Network failed to advertise routes: %v", err)
}
continue
}
// it's a solication, someone asked for it
// so we're going to pick off the node and send it
select {
case node := <-n.solicited:
// someone requested the route
n.sendTo("advert", ControlChannel, node, msg)
default:
// send to all since we can't get anything
n.sendMsg("advert", ControlChannel, msg)
}
case <-n.closed:
return
}
@ -939,41 +1063,87 @@ func (n *network) sendConnect() {
Address: n.node.address,
},
}
if err := n.sendMsg("connect", msg, NetworkChannel); err != nil {
if err := n.sendMsg("connect", NetworkChannel, msg); err != nil {
log.Debugf("Network failed to send connect message: %s", err)
}
}
// connect will wait for a link to be established
// connect will wait for a link to be established and send the connect
// message. We're trying to ensure convergence pretty quickly. So we want
// to hear back. In the case we become completely disconnected we'll
// connect again once a new link is established
func (n *network) connect() {
// wait for connected state
var connected bool
// discovered lets us know what we received a peer message back
var discovered bool
var attempts int
// our advertise address
loopback := n.server.Options().Advertise
// actual address
address := n.tunnel.Address()
for {
// check the links
// connected is used to define if the link is connected
var connected bool
// check the links state
for _, link := range n.tunnel.Links() {
// skip loopback
if link.Loopback() {
continue
}
// if remote is ourselves
switch link.Remote() {
case loopback, address:
continue
}
if link.State() == "connected" {
connected = true
break
}
}
// if we're not conencted wait
// if we're not connected wait
if !connected {
// reset discovered
discovered = false
// sleep for a second
time.Sleep(time.Second)
// now try again
continue
}
// we're connected but are we discovered?
if !discovered {
// recreate the clients because all the tunnel links are gone
// so we haven't send discovery beneath
if err := n.createClients(); err != nil {
log.Debugf("Failed to recreate network/control clients: %v", err)
continue
}
// send the connect message
n.sendConnect()
}
// check the announce channel
// check if we've been discovered
select {
case <-n.announced:
case <-n.discovered:
discovered = true
attempts = 0
case <-n.closed:
return
default:
time.Sleep(time.Second)
// we have to go again
case <-time.After(time.Second + backoff.Do(attempts)):
// we have to try again
attempts++
// reset attempts 5 == ~2mins
if attempts > 5 {
attempts = 0
}
}
}
}
@ -982,18 +1152,18 @@ func (n *network) connect() {
func (n *network) Connect() error {
n.Lock()
// try to resolve network nodes
nodes, err := n.resolveNodes()
if err != nil {
log.Debugf("Network failed to resolve nodes: %v", err)
}
// connect network tunnel
if err := n.tunnel.Connect(); err != nil {
n.Unlock()
return err
}
// try to resolve network nodes
nodes, err := n.resolveNodes()
if err != nil {
log.Debugf("Network failed to resolve nodes: %v", err)
}
// initialize the tunnel to resolved nodes
n.tunnel.Init(
tunnel.Nodes(nodes...),
@ -1048,8 +1218,6 @@ func (n *network) Connect() error {
// create closed channel
n.closed = make(chan bool)
// create new announced channel
n.announced = make(chan bool)
// start the router
if err := n.options.Router.Start(); err != nil {
@ -1073,16 +1241,14 @@ func (n *network) Connect() error {
// send connect after there's a link established
go n.connect()
// go resolving network nodes
// resolve network nodes and re-init the tunnel
go n.resolve()
// broadcast peers
go n.announce(netClient)
// prune stale nodes
go n.prune()
// listen to network messages
go n.processNetChan(netListener)
// broadcast announcements and prune stale nodes
go n.manage()
// advertise service routes
go n.advertise(advertChan)
// listen to network messages
go n.processNetChan(netListener)
// accept and process routes
go n.processCtrlChan(ctrlListener)
@ -1112,6 +1278,40 @@ func (n *network) close() error {
return nil
}
// createClients is used to create new clients in the event we lose all the tunnels
func (n *network) createClients() error {
// dial into ControlChannel to send route adverts
ctrlClient, err := n.tunnel.Dial(ControlChannel, tunnel.DialMode(tunnel.Multicast))
if err != nil {
return err
}
// dial into NetworkChannel to send network messages
netClient, err := n.tunnel.Dial(NetworkChannel, tunnel.DialMode(tunnel.Multicast))
if err != nil {
return err
}
n.Lock()
defer n.Unlock()
// set the control client
c, ok := n.tunClient[ControlChannel]
if ok {
c.Close()
}
n.tunClient[ControlChannel] = ctrlClient
// set the network client
c, ok = n.tunClient[NetworkChannel]
if ok {
c.Close()
}
n.tunClient[NetworkChannel] = netClient
return nil
}
// Close closes network connection
func (n *network) Close() error {
n.Lock()
@ -1140,7 +1340,7 @@ func (n *network) Close() error {
Address: n.node.address,
},
}
if err := n.sendMsg("close", msg, NetworkChannel); err != nil {
if err := n.sendMsg("close", NetworkChannel, msg); err != nil {
log.Debugf("Network failed to send close message: %s", err)
}
}

8
network/network.go
View File

@ -56,14 +56,6 @@ type Network interface {
Server() server.Server
}
// message is network message
type message struct {
// msg is transport message
msg *transport.Message
// session is tunnel session
session tunnel.Session
}
// NewNetwork returns a new network interface
func NewNetwork(opts ...Option) Network {
return newNetwork(opts...)

2
network/node.go
View File

@ -216,7 +216,7 @@ func (n *node) DeletePeerNode(id string) error {
// PruneStalePeerNodes prune the peers that have not been seen for longer than given time
// It returns a map of the the nodes that got pruned
func (n *node) PruneStalePeerNodes(pruneTime time.Duration) map[string]*node {
func (n *node) PruneStalePeers(pruneTime time.Duration) map[string]*node {
n.Lock()
defer n.Unlock()

2
network/node_test.go
View File

@ -225,7 +225,7 @@ func TestPruneStalePeerNodes(t *testing.T) {
time.Sleep(pruneTime)
// should delete all nodes besides node
pruned := node.PruneStalePeerNodes(pruneTime)
pruned := node.PruneStalePeers(pruneTime)
if len(pruned) != len(nodes)-1 {
t.Errorf("Expected pruned node count: %d, got: %d", len(nodes)-1, len(pruned))

53
proxy/mucp/mucp.go
View File

@ -83,7 +83,8 @@ func readLoop(r server.Request, s client.Stream) error {
// toNodes returns a list of node addresses from given routes
func toNodes(routes []router.Route) []string {
nodes := make([]string, len(routes))
nodes := make([]string, 0, len(routes))
for _, node := range routes {
address := node.Address
if len(node.Gateway) > 0 {
@ -91,11 +92,13 @@ func toNodes(routes []router.Route) []string {
}
nodes = append(nodes, address)
}
return nodes
}
func toSlice(r map[uint64]router.Route) []router.Route {
routes := make([]router.Route, 0, len(r))
for _, v := range r {
routes = append(routes, v)
}
@ -161,6 +164,8 @@ func (p *Proxy) filterRoutes(ctx context.Context, routes []router.Route) []route
filteredRoutes = append(filteredRoutes, route)
}
log.Tracef("Proxy filtered routes %+v vs %+v\n", routes, filteredRoutes)
return filteredRoutes
}
@ -225,13 +230,15 @@ func (p *Proxy) cacheRoutes(service string) ([]router.Route, error) {
// refreshMetrics will refresh any metrics for our local cached routes.
// we may not receive new watch events for these as they change.
func (p *Proxy) refreshMetrics() {
services := make([]string, 0, len(p.Routes))
// get a list of services to update
p.RLock()
services := make([]string, 0, len(p.Routes))
for service := range p.Routes {
services = append(services, service)
}
p.RUnlock()
// get and cache the routes for the service
@ -246,6 +253,8 @@ func (p *Proxy) manageRoutes(route router.Route, action string) error {
p.Lock()
defer p.Unlock()
log.Tracef("Proxy taking route action %v %+v\n", action, route)
switch action {
case "create", "update":
if _, ok := p.Routes[route.Service]; !ok {
@ -253,7 +262,12 @@ func (p *Proxy) manageRoutes(route router.Route, action string) error {
}
p.Routes[route.Service][route.Hash()] = route
case "delete":
// delete that specific route
delete(p.Routes[route.Service], route.Hash())
// clean up the cache entirely
if len(p.Routes[route.Service]) == 0 {
delete(p.Routes, route.Service)
}
default:
return fmt.Errorf("unknown action: %s", action)
}
@ -288,7 +302,7 @@ func (p *Proxy) ProcessMessage(ctx context.Context, msg server.Message) error {
// TODO: check that we're not broadcast storming by sending to the same topic
// that we're actually subscribed to
log.Tracef("Received message for %s", msg.Topic())
log.Tracef("Proxy received message for %s", msg.Topic())
var errors []string
@ -329,7 +343,7 @@ func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server
return errors.BadRequest("go.micro.proxy", "service name is blank")
}
log.Tracef("Received request for %s", service)
log.Tracef("Proxy received request for %s", service)
// are we network routing or local routing
if len(p.Links) == 0 {
@ -363,15 +377,17 @@ func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server
}
//nolint:prealloc
var opts []client.CallOption
opts := []client.CallOption{
// set strategy to round robin
opts = append(opts, client.WithSelectOption(selector.WithStrategy(selector.RoundRobin)))
client.WithSelectOption(selector.WithStrategy(selector.RoundRobin)),
}
// if the address is already set just serve it
// TODO: figure it out if we should know to pick a link
if len(addresses) > 0 {
opts = append(opts, client.WithAddress(addresses...))
opts = append(opts,
client.WithAddress(addresses...),
)
// serve the normal way
return p.serveRequest(ctx, p.Client, service, endpoint, req, rsp, opts...)
@ -387,10 +403,16 @@ func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server
opts = append(opts, client.WithAddress(addresses...))
}
log.Tracef("Proxy calling %+v\n", addresses)
// serve the normal way
return p.serveRequest(ctx, p.Client, service, endpoint, req, rsp, opts...)
}
// we're assuming we need routes to operate on
if len(routes) == 0 {
return errors.InternalServerError("go.micro.proxy", "route not found")
}
var gerr error
// we're routing globally with multiple links
@ -404,11 +426,16 @@ func (p *Proxy) ServeRequest(ctx context.Context, req server.Request, rsp server
continue
}
log.Debugf("Proxy using route %+v\n", route)
log.Tracef("Proxy using route %+v\n", route)
// set the address to call
addresses := toNodes([]router.Route{route})
opts = append(opts, client.WithAddress(addresses...))
// set the address in the options
// disable retries since its one route processing
opts = append(opts,
client.WithAddress(addresses...),
client.WithRetries(0),
)
// do the request with the link
gerr = p.serveRequest(ctx, link, service, endpoint, req, rsp, opts...)
@ -558,7 +585,9 @@ func NewProxy(opts ...options.Option) proxy.Proxy {
}()
go func() {
t := time.NewTicker(time.Minute)
// TODO: speed up refreshing of metrics
// without this ticking effort e.g stream
t := time.NewTicker(time.Second * 10)
defer t.Stop()
// we must refresh route metrics since they do not trigger new events

8
router/default.go
View File

@ -799,7 +799,8 @@ func (r *router) flushRouteEvents(evType EventType) ([]*Event, error) {
// build a list of events to advertise
events := make([]*Event, len(bestRoutes))
i := 0
var i int
for _, route := range bestRoutes {
event := &Event{
Type: evType,
@ -823,9 +824,10 @@ func (r *router) Solicit() error {
// advertise the routes
r.advertWg.Add(1)
go func() {
defer r.advertWg.Done()
r.publishAdvert(RouteUpdate, events)
r.publishAdvert(Solicitation, events)
r.advertWg.Done()
}()
return nil

4
router/router.go
View File

@ -111,6 +111,8 @@ const (
Announce AdvertType = iota
// RouteUpdate advertises route updates
RouteUpdate
// Solicitation indicates routes were solicited
Solicitation
)
// String returns human readable advertisement type
@ -120,6 +122,8 @@ func (t AdvertType) String() string {
return "announce"
case RouteUpdate:
return "update"
case Solicitation:
return "solicitation"
default:
return "unknown"
}

21
server/rpc_codec.go
View File

@ -86,24 +86,18 @@ func getHeader(hdr string, md map[string]string) string {
}
func getHeaders(m *codec.Message) {
get := func(hdr, v string) string {
set := func(v, hdr string) string {
if len(v) > 0 {
return v
}
if hd := m.Header[hdr]; len(hd) > 0 {
return hd
return m.Header[hdr]
}
// old
return m.Header["X-"+hdr]
}
m.Id = get("Micro-Id", m.Id)
m.Error = get("Micro-Error", m.Error)
m.Endpoint = get("Micro-Endpoint", m.Endpoint)
m.Method = get("Micro-Method", m.Method)
m.Target = get("Micro-Service", m.Target)
m.Id = set(m.Id, "Micro-Id")
m.Error = set(m.Error, "Micro-Error")
m.Endpoint = set(m.Endpoint, "Micro-Endpoint")
m.Method = set(m.Method, "Micro-Method")
m.Target = set(m.Target, "Micro-Service")
// TODO: remove this cruft
if len(m.Endpoint) == 0 {
@ -321,7 +315,6 @@ func (c *rpcCodec) Write(r *codec.Message, b interface{}) error {
// write an error if it failed
m.Error = errors.Wrapf(err, "Unable to encode body").Error()
m.Header["X-Micro-Error"] = m.Error
m.Header["Micro-Error"] = m.Error
// no body to write
if err := c.codec.Write(m, nil); err != nil {

13
server/rpc_server.go
View File

@ -549,6 +549,7 @@ func (s *rpcServer) Register() error {
node.Metadata["protocol"] = "mucp"
s.RLock()
// Maps are ordered randomly, sort the keys for consistency
var handlerList []string
for n, e := range s.handlers {
@ -557,6 +558,7 @@ func (s *rpcServer) Register() error {
handlerList = append(handlerList, n)
}
}
sort.Strings(handlerList)
var subscriberList []Subscriber
@ -566,18 +568,20 @@ func (s *rpcServer) Register() error {
subscriberList = append(subscriberList, e)
}
}
sort.Slice(subscriberList, func(i, j int) bool {
return subscriberList[i].Topic() > subscriberList[j].Topic()
})
endpoints := make([]*registry.Endpoint, 0, len(handlerList)+len(subscriberList))
for _, n := range handlerList {
endpoints = append(endpoints, s.handlers[n].Endpoints()...)
}
for _, e := range subscriberList {
endpoints = append(endpoints, e.Endpoints()...)
}
s.RUnlock()
service := &registry.Service{
Name: config.Name,
@ -586,9 +590,10 @@ func (s *rpcServer) Register() error {
Endpoints: endpoints,
}
s.Lock()
// get registered value
registered := s.registered
s.Unlock()
s.RUnlock()
if !registered {
log.Logf("Registry [%s] Registering node: %s", config.Registry.String(), node.Id)
@ -610,6 +615,8 @@ func (s *rpcServer) Register() error {
defer s.Unlock()
s.registered = true
// set what we're advertising
s.opts.Advertise = addr
// subscribe to the topic with own name
sub, err := s.opts.Broker.Subscribe(config.Name, s.HandleEvent)

2
service.go
View File

@ -9,9 +9,9 @@ import (
"github.com/micro/go-micro/client"
"github.com/micro/go-micro/config/cmd"
"github.com/micro/go-micro/debug/service/handler"
"github.com/micro/go-micro/debug/profile"
"github.com/micro/go-micro/debug/profile/pprof"
"github.com/micro/go-micro/debug/service/handler"
"github.com/micro/go-micro/plugin"
"github.com/micro/go-micro/server"
"github.com/micro/go-micro/util/log"

17
tunnel/default.go
View File

@ -327,6 +327,7 @@ func (t *tun) process() {
// and the message is being sent outbound via
// a dialled connection don't use this link
if loopback && msg.outbound {
log.Tracef("Link for node %s is loopback", node)
err = errors.New("link is loopback")
continue
}
@ -334,6 +335,7 @@ func (t *tun) process() {
// if the message was being returned by the loopback listener
// send it back up the loopback link only
if msg.loopback && !loopback {
log.Tracef("Link for message %s is loopback", node)
err = errors.New("link is not loopback")
continue
}
@ -363,7 +365,7 @@ func (t *tun) process() {
// send the message
for _, link := range sendTo {
// send the message via the current link
log.Tracef("Sending %+v to %s", newMsg.Header, link.Remote())
log.Tracef("Tunnel sending %+v to %s", newMsg.Header, link.Remote())
if errr := link.Send(newMsg); errr != nil {
log.Debugf("Tunnel error sending %+v to %s: %v", newMsg.Header, link.Remote(), errr)
@ -502,6 +504,7 @@ func (t *tun) listen(link *link) {
// nothing more to do
continue
case "close":
log.Debugf("Tunnel link %s received close message", link.Remote())
// if there is no channel then we close the link
// as its a signal from the other side to close the connection
if len(channel) == 0 {
@ -555,9 +558,11 @@ func (t *tun) listen(link *link) {
// a continued session
case "session":
// process message
log.Tracef("Received %+v from %s", msg.Header, link.Remote())
log.Tracef("Tunnel received %+v from %s", msg.Header, link.Remote())
// an announcement of a channel listener
case "announce":
log.Tracef("Tunnel received %+v from %s", msg.Header, link.Remote())
// process the announcement
channels := strings.Split(channel, ",")
@ -629,7 +634,7 @@ func (t *tun) listen(link *link) {
s, exists = t.getSession(channel, "listener")
// only return accept to the session
case mtype == "accept":
log.Debugf("Received accept message for channel: %s session: %s", channel, sessionId)
log.Debugf("Tunnel received accept message for channel: %s session: %s", channel, sessionId)
s, exists = t.getSession(channel, sessionId)
if exists && s.accepted {
continue
@ -649,7 +654,7 @@ func (t *tun) listen(link *link) {
// bail if no session or listener has been found
if !exists {
log.Debugf("Tunnel skipping no channel: %s session: %s exists", channel, sessionId)
log.Tracef("Tunnel skipping no channel: %s session: %s exists", channel, sessionId)
// drop it, we don't care about
// messages we don't know about
continue
@ -665,7 +670,7 @@ func (t *tun) listen(link *link) {
// otherwise process
}
log.Debugf("Tunnel using channel: %s session: %s type: %s", s.channel, s.session, mtype)
log.Tracef("Tunnel using channel: %s session: %s type: %s", s.channel, s.session, mtype)
// construct a new transport message
tmsg := &transport.Message{
@ -740,7 +745,7 @@ func (t *tun) keepalive(link *link) {
"Micro-Tunnel-Id": t.id,
},
}); err != nil {
log.Debugf("Error sending keepalive to link %v: %v", link.Remote(), err)
log.Debugf("Tunnel error sending keepalive to link %v: %v", link.Remote(), err)
t.delLink(link.Remote())
return
}

54
tunnel/link.go
View File

@ -2,6 +2,7 @@ package tunnel
import (
"bytes"
"errors"
"io"
"sync"
"time"
@ -14,7 +15,11 @@ import (
type link struct {
transport.Socket
// transport to use for connections
transport transport.Transport
sync.RWMutex
// stops the link
closed chan bool
// link state channel for testing link
@ -65,6 +70,8 @@ var (
linkRequest = []byte{0, 0, 0, 0}
// the 4 byte 1 filled packet sent to determine link state
linkResponse = []byte{1, 1, 1, 1}
ErrLinkConnectTimeout = errors.New("link connect timeout")
)
func newLink(s transport.Socket) *link {
@ -72,8 +79,8 @@ func newLink(s transport.Socket) *link {
Socket: s,
id: uuid.New().String(),
lastKeepAlive: time.Now(),
channels: make(map[string]time.Time),
closed: make(chan bool),
channels: make(map[string]time.Time),
state: make(chan *packet, 64),
sendQueue: make(chan *packet, 128),
recvQueue: make(chan *packet, 128),
@ -87,6 +94,32 @@ func newLink(s transport.Socket) *link {
return l
}
func (l *link) connect(addr string) error {
c, err := l.transport.Dial(addr)
if err != nil {
return err
}
l.Lock()
l.Socket = c
l.Unlock()
return nil
}
func (l *link) accept(sock transport.Socket) error {
l.Lock()
l.Socket = sock
l.Unlock()
return nil
}
func (l *link) setLoopback(v bool) {
l.Lock()
l.loopback = v
l.Unlock()
}
// setRate sets the bits per second rate as a float64
func (l *link) setRate(bits int64, delta time.Duration) {
// rate of send in bits per nanosecond
@ -201,11 +234,15 @@ func (l *link) manage() {
t := time.NewTicker(time.Minute)
defer t.Stop()
// get link id
linkId := l.Id()
// used to send link state packets
send := func(b []byte) error {
return l.Send(&transport.Message{
Header: map[string]string{
"Micro-Method": "link",
"Micro-Link-Id": linkId,
}, Body: b,
})
}
@ -229,9 +266,7 @@ func (l *link) manage() {
// check the type of message
switch {
case bytes.Equal(p.message.Body, linkRequest):
l.RLock()
log.Tracef("Link %s received link request %v", l.id, p.message.Body)
l.RUnlock()
log.Tracef("Link %s received link request", linkId)
// send response
if err := send(linkResponse); err != nil {
@ -242,9 +277,7 @@ func (l *link) manage() {
case bytes.Equal(p.message.Body, linkResponse):
// set round trip time
d := time.Since(now)
l.RLock()
log.Tracef("Link %s received link response in %v", p.message.Body, d)
l.RUnlock()
log.Tracef("Link %s received link response in %v", linkId, d)
// set the RTT
l.setRTT(d)
}
@ -309,6 +342,12 @@ func (l *link) Rate() float64 {
return l.rate
}
func (l *link) Loopback() bool {
l.RLock()
defer l.RUnlock()
return l.loopback
}
// Length returns the roundtrip time as nanoseconds (lower is better).
// Returns 0 where no measurement has been taken.
func (l *link) Length() int64 {
@ -320,7 +359,6 @@ func (l *link) Length() int64 {
func (l *link) Id() string {
l.RLock()
defer l.RUnlock()
return l.id
}

4
tunnel/listener.go
View File

@ -80,7 +80,7 @@ func (t *tunListener) process() {
// get a session
sess, ok := conns[sessionId]
log.Debugf("Tunnel listener received channel %s session %s type %s exists: %t", m.channel, sessionId, m.typ, ok)
log.Tracef("Tunnel listener received channel %s session %s type %s exists: %t", m.channel, sessionId, m.typ, ok)
if !ok {
// we only process open and session types
switch m.typ {
@ -159,7 +159,7 @@ func (t *tunListener) process() {
case <-sess.closed:
delete(conns, sessionId)
case sess.recv <- m:
log.Debugf("Tunnel listener sent to recv chan channel %s session %s type %s", m.channel, sessionId, m.typ)
log.Tracef("Tunnel listener sent to recv chan channel %s session %s type %s", m.channel, sessionId, m.typ)
}
}
}

2
tunnel/session.go
View File

@ -356,7 +356,7 @@ func (s *session) Recv(m *transport.Message) error {
}
//log.Tracef("Received %+v from recv backlog", msg)
log.Debugf("Received %+v from recv backlog", msg)
log.Tracef("Received %+v from recv backlog", msg)
// decrypt the received payload using the token
// we have to used msg.session because multicast has a shared

4
tunnel/tunnel.go
View File

@ -64,7 +64,9 @@ type Link interface {
Length() int64
// Current transfer rate as bits per second (lower is better)
Rate() float64
// State of the link e.g connected/closed
// Is this a loopback link
Loopback() bool
// State of the link: connected/closed/error
State() string
// honours transport socket
transport.Socket