LBRYCommunity/reflector.go
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started merging all components into one

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This commit is contained in:
Alex Grintsvayg 2018-05-29 17:19:40 -04:00
parent 388c1128ec
commit 1075de77f5
8 changed files with 282 additions and 210 deletions
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174
cluster/cluster.go
View file

@ -3,105 +3,127 @@ package cluster
import (
"io/ioutil"
baselog "log"
"os"
"os/signal"
"strconv"
"sync"
"syscall"
"sort"
"github.com/davecgh/go-spew/spew"
"github.com/lbryio/lbry.go/crypto"
"github.com/lbryio/lbry.go/errors"
"github.com/lbryio/reflector.go/cluster"
"github.com/lbryio/lbry.go/stopOnce"
"github.com/hashicorp/serf/serf"
log "github.com/sirupsen/logrus"
)
const (
DefaultClusterPort = 17946
)
type Cluster struct {
name string
port int
seedAddr string
s *serf.Serf
eventCh <-chan serf.Event
eventCh chan serf.Event
stop *stopOnce.Stopper
}
func New() {
c := &Cluster{}
func New(port int, seedAddr string) *Cluster {
return &Cluster{
name: crypto.RandString(12),
port: port,
seedAddr: seedAddr,
stop: stopOnce.New(),
}
}
func (c *Cluster) Connect() error {
var err error
nodeName := crypto.RandString(12)
clusterAddr := "127.0.0.1:" + strconv.Itoa(clusterPort)
if args[0] == clusterStart {
c.s, c.eventCh, err = cluster.Connect(nodeName, clusterAddr, clusterPort)
} else {
c.s, c.eventCh, err = cluster.Connect(nodeName, clusterAddr, clusterPort+1+int(crypto.RandInt64(1000)))
}
if err != nil {
log.Fatal(err)
}
defer c.Leave()
shutdownCh := make(chan struct{})
var shutdownWg sync.WaitGroup
shutdownWg.Add(1)
go func() {
defer shutdownWg.Done()
for {
select {
case event := <-eventCh:
spew.Dump(event)
switch event.EventType() {
case serf.EventMemberJoin, serf.EventMemberFailed, serf.EventMemberLeave:
memberEvent := event.(serf.MemberEvent)
if event.EventType() == serf.EventMemberJoin && len(memberEvent.Members) == 1 && memberEvent.Members[0].Name == nodeName {
// ignore event from my own joining of the cluster
} else {
//spew.Dump(c.Members())
alive := getAliveMembers(c.Members())
log.Printf("%s: my hash range is now %d of %d\n", nodeName, getHashRangeStart(nodeName, alive), len(alive))
// figure out my new hash range based on the start and the number of alive members
// get hashes in that range that need announcing
// announce them
// if more than one node is announcing each hash, figure out how to deal with last_announced_at so both nodes dont announce the same thing at the same time
}
}
case <-shutdownCh:
log.Debugln("shutting down event dumper")
return
}
}
}()
interruptChan := make(chan os.Signal, 1)
signal.Notify(interruptChan, os.Interrupt, syscall.SIGTERM)
<-interruptChan
log.Debugln("received interrupt")
close(shutdownCh)
log.Debugln("waiting for threads to finish")
shutdownWg.Wait()
log.Debugln("shutting down main thread")
}
func Connect(nodeName, addr string, port int) (*serf.Serf, <-chan serf.Event, error) {
conf := serf.DefaultConfig()
conf.MemberlistConfig.BindPort = port
conf.MemberlistConfig.AdvertisePort = port
conf.NodeName = nodeName
conf.MemberlistConfig.BindPort = c.port
conf.MemberlistConfig.AdvertisePort = c.port
conf.NodeName = c.name
nullLogger := baselog.New(ioutil.Discard, "", 0)
conf.Logger = nullLogger
eventCh := make(chan serf.Event)
conf.EventCh = eventCh
c.eventCh = make(chan serf.Event)
conf.EventCh = c.eventCh
cluster, err := serf.Create(conf)
c.s, err = serf.Create(conf)
if err != nil {
return nil, nil, errors.Prefix("couldn't create cluster", err)
return errors.Prefix("couldn't create cluster", err)
}
_, err = cluster.Join([]string{addr}, true)
if err != nil {
log.Warnf("couldn't join cluster, starting own: %v\n", err)
if c.seedAddr != "" {
_, err = c.s.Join([]string{c.seedAddr}, true)
if err != nil {
return err
}
}
return cluster, eventCh, nil
c.listen()
return nil
}
func (c *Cluster) Shutdown() {
c.stop.StopAndWait()
c.s.Leave()
}
func (c *Cluster) listen() {
c.stop.Add(1)
go func() {
defer c.stop.Done()
for {
select {
case <-c.stop.Ch():
return
case event := <-c.eventCh:
switch event.EventType() {
case serf.EventMemberJoin, serf.EventMemberFailed, serf.EventMemberLeave:
memberEvent := event.(serf.MemberEvent)
if event.EventType() == serf.EventMemberJoin && len(memberEvent.Members) == 1 && memberEvent.Members[0].Name == c.name {
// ignore event from my own joining of the cluster
continue
}
//spew.Dump(c.Members())
alive := getAliveMembers(c.s.Members())
log.Printf("%s: my hash range is now %d of %d\n", c.name, getHashRangeStart(c.name, alive), len(alive))
// figure out my new hash range based on the start and the number of alive members
// get hashes in that range that need announcing
// announce them
// if more than one node is announcing each hash, figure out how to deal with last_announced_at so both nodes dont announce the same thing at the same time
}
}
}
}()
}
func getHashRangeStart(myName string, members []serf.Member) int {
var names []string
for _, m := range members {
names = append(names, m.Name)
}
sort.Strings(names)
i := 1
for _, n := range names {
if n == myName {
return i
}
i++
}
return -1
}
func getAliveMembers(members []serf.Member) []serf.Member {
var alive []serf.Member
for _, m := range members {
if m.Status == serf.StatusAlive {
alive = append(alive, m)
}
}
return alive
}

95
cmd/cluster.go
View file

@ -3,32 +3,21 @@ package cmd
import (
"os"
"os/signal"
"sort"
"strconv"
"sync"
"syscall"
"github.com/lbryio/lbry.go/crypto"
"github.com/lbryio/reflector.go/cluster"
"github.com/davecgh/go-spew/spew"
"github.com/hashicorp/serf/serf"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
const (
clusterStart = "start"
clusterJoin = "join"
clusterPort = 17946
)
func init() {
var cmd = &cobra.Command{
Use: "cluster [start|join]",
Short: "Connect to cluster",
ValidArgs: []string{clusterStart, clusterJoin},
ValidArgs: []string{"start", "join"},
Args: argFuncs(cobra.ExactArgs(1), cobra.OnlyValidArgs),
Run: clusterCmd,
}
@ -36,87 +25,21 @@ func init() {
}
func clusterCmd(cmd *cobra.Command, args []string) {
var c *serf.Serf
var eventCh <-chan serf.Event
var err error
nodeName := crypto.RandString(12)
clusterAddr := "127.0.0.1:" + strconv.Itoa(clusterPort)
if args[0] == clusterStart {
c, eventCh, err = cluster.Connect(nodeName, clusterAddr, clusterPort)
port := 17946
var c *cluster.Cluster
if args[0] == "start" {
c = cluster.New(port, "")
} else {
c, eventCh, err = cluster.Connect(nodeName, clusterAddr, clusterPort+1+int(crypto.RandInt64(1000)))
c = cluster.New(port+1+int(crypto.RandInt64(1000)), "127.0.0.1:"+strconv.Itoa(port))
}
err := c.Connect()
if err != nil {
log.Fatal(err)
}
defer c.Leave()
shutdownCh := make(chan struct{})
var shutdownWg sync.WaitGroup
shutdownWg.Add(1)
go func() {
defer shutdownWg.Done()
for {
select {
case event := <-eventCh:
spew.Dump(event)
switch event.EventType() {
case serf.EventMemberJoin, serf.EventMemberFailed, serf.EventMemberLeave:
memberEvent := event.(serf.MemberEvent)
if event.EventType() == serf.EventMemberJoin && len(memberEvent.Members) == 1 && memberEvent.Members[0].Name == nodeName {
// ignore event from my own joining of the cluster
} else {
//spew.Dump(c.Members())
alive := getAliveMembers(c.Members())
log.Printf("%s: my hash range is now %d of %d\n", nodeName, getHashRangeStart(nodeName, alive), len(alive))
// figure out my new hash range based on the start and the number of alive members
// get hashes in that range that need announcing
// announce them
// if more than one node is announcing each hash, figure out how to deal with last_announced_at so both nodes dont announce the same thing at the same time
}
}
case <-shutdownCh:
log.Debugln("shutting down event dumper")
return
}
}
}()
interruptChan := make(chan os.Signal, 1)
signal.Notify(interruptChan, os.Interrupt, syscall.SIGTERM)
<-interruptChan
log.Debugln("received interrupt")
close(shutdownCh)
log.Debugln("waiting for threads to finish")
shutdownWg.Wait()
log.Debugln("shutting down main thread")
}
func getHashRangeStart(myName string, members []serf.Member) int {
var names []string
for _, m := range members {
names = append(names, m.Name)
}
sort.Strings(names)
i := 1
for _, n := range names {
if n == myName {
return i
}
i++
}
return -1
}
func getAliveMembers(members []serf.Member) []serf.Member {
var alive []serf.Member
for _, m := range members {
if m.Status == serf.StatusAlive {
alive = append(alive, m)
}
}
return alive
c.Shutdown()
}

2
cmd/root.go
View file

@ -5,7 +5,7 @@ import (
"io/ioutil"
"os"
"github.com/lbryio/errors.go"
"github.com/lbryio/lbry.go/errors"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"

50
cmd/start.go Normal file
View file

@ -0,0 +1,50 @@
package cmd
import (
"os"
"os/signal"
"syscall"
"github.com/lbryio/reflector.go/db"
"github.com/lbryio/reflector.go/reflector"
"github.com/lbryio/reflector.go/store"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
func init() {
var cmd = &cobra.Command{
Use: "start [cluster-address]",
Short: "Run prism server",
Run: startCmd,
Args: cobra.RangeArgs(0, 1),
}
RootCmd.AddCommand(cmd)
}
func startCmd(cmd *cobra.Command, args []string) {
db := new(db.SQL)
err := db.Connect(GlobalConfig.DBConn)
checkErr(err)
s3 := store.NewS3BlobStore(GlobalConfig.AwsID, GlobalConfig.AwsSecret, GlobalConfig.BucketRegion, GlobalConfig.BucketName)
comboStore := store.NewDBBackedS3Store(s3, db)
clusterAddr := ""
if len(args) > 0 {
clusterAddr = args[0]
}
p := reflector.NewPrism(comboStore, clusterAddr)
err = p.Connect()
if err != nil {
log.Error(err)
return
}
interruptChan := make(chan os.Signal, 1)
signal.Notify(interruptChan, os.Interrupt, syscall.SIGTERM)
<-interruptChan
p.Shutdown()
}

56
peer/server.go
View file

@ -10,9 +10,10 @@ import (
"strings"
"time"
"github.com/davecgh/go-spew/spew"
"github.com/lbryio/lbry.go/errors"
"github.com/lbryio/reflector.go/store"
"github.com/davecgh/go-spew/spew"
log "github.com/sirupsen/logrus"
)
@ -22,7 +23,9 @@ const (
)
type Server struct {
store store.BlobStore
store store.BlobStore
l net.Listener
closed bool
}
func NewServer(store store.BlobStore) *Server {
@ -31,6 +34,12 @@ func NewServer(store store.BlobStore) *Server {
}
}
func (s *Server) Shutdown() {
// TODO: need waitgroup so we can finish whatever we're doing before stopping
s.closed = true
s.l.Close()
}
func (s *Server) ListenAndServe(address string) error {
log.Println("Listening on " + address)
l, err := net.Listen("tcp", address)
@ -42,6 +51,9 @@ func (s *Server) ListenAndServe(address string) error {
for {
conn, err := l.Accept()
if err != nil {
if s.closed {
return nil
}
log.Error(err)
} else {
go s.handleConnection(conn)
@ -217,3 +229,43 @@ func GetBlobHash(blob []byte) string {
hashBytes := sha512.Sum384(blob)
return hex.EncodeToString(hashBytes[:])
}
const (
maxRequestSize = 64 * (2 ^ 10) // 64kb
paymentRateAccepted = "RATE_ACCEPTED"
paymentRateTooLow = "RATE_TOO_LOW"
paymentRateUnset = "RATE_UNSET"
)
var errRequestTooLarge = errors.Base("request is too large")
type availabilityRequest struct {
LbrycrdAddress bool `json:"lbrycrd_address"`
RequestedBlobs []string `json:"requested_blobs"`
}
type availabilityResponse struct {
LbrycrdAddress string `json:"lbrycrd_address"`
AvailableBlobs []string `json:"available_blobs"`
}
type paymentRateRequest struct {
BlobDataPaymentRate float64 `json:"blob_data_payment_rate"`
}
type paymentRateResponse struct {
BlobDataPaymentRate string `json:"blob_data_payment_rate"`
}
type blobRequest struct {
RequestedBlob string `json:"requested_blob"`
}
type incomingBlob struct {
Error string `json:"error,omitempty"`
BlobHash string `json:"blob_hash"`
Length int `json:"length"`
}
type blobResponse struct {
IncomingBlob incomingBlob `json:"incoming_blob"`
}

44
peer/shared.go
View file

@ -1,44 +0,0 @@
package peer
import "github.com/lbryio/lbry.go/errors"
const maxRequestSize = 64 * (2 ^ 10) // 64kb
var errRequestTooLarge = errors.Base("request is too large")
type availabilityRequest struct {
LbrycrdAddress bool `json:"lbrycrd_address"`
RequestedBlobs []string `json:"requested_blobs"`
}
type availabilityResponse struct {
LbrycrdAddress string `json:"lbrycrd_address"`
AvailableBlobs []string `json:"available_blobs"`
}
const (
paymentRateAccepted = "RATE_ACCEPTED"
paymentRateTooLow = "RATE_TOO_LOW"
paymentRateUnset = "RATE_UNSET"
)
type paymentRateRequest struct {
BlobDataPaymentRate float64 `json:"blob_data_payment_rate"`
}
type paymentRateResponse struct {
BlobDataPaymentRate string `json:"blob_data_payment_rate"`
}
type blobRequest struct {
RequestedBlob string `json:"requested_blob"`
}
type incomingBlob struct {
Error string `json:"error,omitempty"`
BlobHash string `json:"blob_hash"`
Length int `json:"length"`
}
type blobResponse struct {
IncomingBlob incomingBlob `json:"incoming_blob"`
}

58
reflector/prism.go Normal file
View file

@ -0,0 +1,58 @@
package reflector
import (
"github.com/lbryio/lbry.go/stopOnce"
"github.com/lbryio/reflector.go/cluster"
"github.com/lbryio/reflector.go/dht"
"github.com/lbryio/reflector.go/peer"
"github.com/lbryio/reflector.go/store"
)
type Prism struct {
dht *dht.DHT
peer *peer.Server
reflector *Server
cluster *cluster.Cluster
stop *stopOnce.Stopper
}
func NewPrism(store store.BlobStore, clusterSeedAddr string) *Prism {
d, err := dht.New(nil)
if err != nil {
panic(err)
}
return &Prism{
dht: d,
peer: peer.NewServer(store),
reflector: NewServer(store),
cluster: cluster.New(cluster.DefaultClusterPort, clusterSeedAddr),
stop: stopOnce.New(),
}
}
func (p *Prism) Connect() error {
err := p.dht.Start()
if err != nil {
return err
}
err = p.cluster.Connect()
if err != nil {
return err
}
// start peer
// start reflector
return nil
}
func (p *Prism) Shutdown() {
p.stop.StopAndWait()
p.reflector.Shutdown()
p.peer.Shutdown()
p.cluster.Shutdown()
p.dht.Shutdown()
}

13
reflector/server.go
View file

@ -15,7 +15,9 @@ import (
)
type Server struct {
store store.BlobStore
store store.BlobStore
l net.Listener
closed bool
}
func NewServer(store store.BlobStore) *Server {
@ -24,6 +26,12 @@ func NewServer(store store.BlobStore) *Server {
}
}
func (s *Server) Shutdown() {
// TODO: need waitgroup so we can finish whatever we're doing before stopping
s.closed = true
s.l.Close()
}
func (s *Server) ListenAndServe(address string) error {
log.Println("Listening on " + address)
l, err := net.Listen("tcp", address)
@ -35,6 +43,9 @@ func (s *Server) ListenAndServe(address string) error {
for {
conn, err := l.Accept()
if err != nil {
if s.closed {
return nil
}
log.Error(err)
} else {
go s.handleConn(conn)