79c7a69ac8
* swarm: Better syncing and retrieval option definition * swarm/network/stream: better comments * swarm/network/stream: addressed PR comments
619 lines
19 KiB
Go
619 lines
19 KiB
Go
// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package stream
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import (
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"context"
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crand "crypto/rand"
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"fmt"
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"io"
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"os"
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"runtime"
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"sync"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/p2p/simulations"
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"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
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"github.com/ethereum/go-ethereum/swarm/network"
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"github.com/ethereum/go-ethereum/swarm/network/simulation"
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"github.com/ethereum/go-ethereum/swarm/pot"
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"github.com/ethereum/go-ethereum/swarm/state"
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"github.com/ethereum/go-ethereum/swarm/storage"
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mockdb "github.com/ethereum/go-ethereum/swarm/storage/mock/db"
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)
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const MaxTimeout = 600
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type synctestConfig struct {
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addrs [][]byte
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hashes []storage.Address
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idToChunksMap map[enode.ID][]int
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//chunksToNodesMap map[string][]int
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addrToIDMap map[string]enode.ID
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}
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const (
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// EventTypeNode is the type of event emitted when a node is either
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// created, started or stopped
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EventTypeChunkCreated simulations.EventType = "chunkCreated"
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EventTypeChunkOffered simulations.EventType = "chunkOffered"
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EventTypeChunkWanted simulations.EventType = "chunkWanted"
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EventTypeChunkDelivered simulations.EventType = "chunkDelivered"
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EventTypeChunkArrived simulations.EventType = "chunkArrived"
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EventTypeSimTerminated simulations.EventType = "simTerminated"
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)
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// Tests in this file should not request chunks from peers.
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// This function will panic indicating that there is a problem if request has been made.
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func dummyRequestFromPeers(_ context.Context, req *network.Request) (*enode.ID, chan struct{}, error) {
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panic(fmt.Sprintf("unexpected request: address %s, source %s", req.Addr.String(), req.Source.String()))
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}
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//This test is a syncing test for nodes.
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//One node is randomly selected to be the pivot node.
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//A configurable number of chunks and nodes can be
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//provided to the test, the number of chunks is uploaded
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//to the pivot node, and we check that nodes get the chunks
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//they are expected to store based on the syncing protocol.
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//Number of chunks and nodes can be provided via commandline too.
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func TestSyncingViaGlobalSync(t *testing.T) {
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if runtime.GOOS == "darwin" && os.Getenv("TRAVIS") == "true" {
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t.Skip("Flaky on mac on travis")
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}
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//if nodes/chunks have been provided via commandline,
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//run the tests with these values
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if *nodes != 0 && *chunks != 0 {
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log.Info(fmt.Sprintf("Running test with %d chunks and %d nodes...", *chunks, *nodes))
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testSyncingViaGlobalSync(t, *chunks, *nodes)
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} else {
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var nodeCnt []int
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var chnkCnt []int
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//if the `longrunning` flag has been provided
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//run more test combinations
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if *longrunning {
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chnkCnt = []int{1, 8, 32, 256, 1024}
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nodeCnt = []int{16, 32, 64, 128, 256}
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} else {
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//default test
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chnkCnt = []int{4, 32}
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nodeCnt = []int{32, 16}
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}
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for _, chnk := range chnkCnt {
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for _, n := range nodeCnt {
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log.Info(fmt.Sprintf("Long running test with %d chunks and %d nodes...", chnk, n))
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testSyncingViaGlobalSync(t, chnk, n)
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}
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}
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}
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}
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func TestSyncingViaDirectSubscribe(t *testing.T) {
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if runtime.GOOS == "darwin" && os.Getenv("TRAVIS") == "true" {
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t.Skip("Flaky on mac on travis")
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}
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//if nodes/chunks have been provided via commandline,
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//run the tests with these values
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if *nodes != 0 && *chunks != 0 {
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log.Info(fmt.Sprintf("Running test with %d chunks and %d nodes...", *chunks, *nodes))
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err := testSyncingViaDirectSubscribe(t, *chunks, *nodes)
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if err != nil {
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t.Fatal(err)
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}
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} else {
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var nodeCnt []int
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var chnkCnt []int
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//if the `longrunning` flag has been provided
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//run more test combinations
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if *longrunning {
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chnkCnt = []int{1, 8, 32, 256, 1024}
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nodeCnt = []int{32, 16}
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} else {
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//default test
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chnkCnt = []int{4, 32}
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nodeCnt = []int{32, 16}
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}
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for _, chnk := range chnkCnt {
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for _, n := range nodeCnt {
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log.Info(fmt.Sprintf("Long running test with %d chunks and %d nodes...", chnk, n))
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err := testSyncingViaDirectSubscribe(t, chnk, n)
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if err != nil {
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t.Fatal(err)
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}
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}
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}
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}
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}
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var simServiceMap = map[string]simulation.ServiceFunc{
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"streamer": streamerFunc,
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}
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func streamerFunc(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
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n := ctx.Config.Node()
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addr := network.NewAddr(n)
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store, datadir, err := createTestLocalStorageForID(n.ID(), addr)
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if err != nil {
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return nil, nil, err
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}
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bucket.Store(bucketKeyStore, store)
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localStore := store.(*storage.LocalStore)
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netStore, err := storage.NewNetStore(localStore, nil)
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if err != nil {
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return nil, nil, err
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}
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kad := network.NewKademlia(addr.Over(), network.NewKadParams())
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delivery := NewDelivery(kad, netStore)
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netStore.NewNetFetcherFunc = network.NewFetcherFactory(dummyRequestFromPeers, true).New
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r := NewRegistry(addr.ID(), delivery, netStore, state.NewInmemoryStore(), &RegistryOptions{
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Retrieval: RetrievalDisabled,
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Syncing: SyncingAutoSubscribe,
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SyncUpdateDelay: 3 * time.Second,
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})
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bucket.Store(bucketKeyRegistry, r)
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cleanup = func() {
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os.RemoveAll(datadir)
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netStore.Close()
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r.Close()
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}
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return r, cleanup, nil
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}
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func testSyncingViaGlobalSync(t *testing.T, chunkCount int, nodeCount int) {
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sim := simulation.New(simServiceMap)
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defer sim.Close()
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log.Info("Initializing test config")
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conf := &synctestConfig{}
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//map of discover ID to indexes of chunks expected at that ID
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conf.idToChunksMap = make(map[enode.ID][]int)
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//map of overlay address to discover ID
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conf.addrToIDMap = make(map[string]enode.ID)
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//array where the generated chunk hashes will be stored
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conf.hashes = make([]storage.Address, 0)
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err := sim.UploadSnapshot(fmt.Sprintf("testing/snapshot_%d.json", nodeCount))
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if err != nil {
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t.Fatal(err)
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}
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ctx, cancelSimRun := context.WithTimeout(context.Background(), 2*time.Minute)
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defer cancelSimRun()
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if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
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t.Fatal(err)
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}
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disconnections := sim.PeerEvents(
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context.Background(),
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sim.NodeIDs(),
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simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeDrop),
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)
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go func() {
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for d := range disconnections {
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log.Error("peer drop", "node", d.NodeID, "peer", d.Event.Peer)
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t.Fatal("unexpected disconnect")
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cancelSimRun()
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}
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}()
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result := runSim(conf, ctx, sim, chunkCount)
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if result.Error != nil {
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t.Fatal(result.Error)
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}
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log.Info("Simulation ended")
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}
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func runSim(conf *synctestConfig, ctx context.Context, sim *simulation.Simulation, chunkCount int) simulation.Result {
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return sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
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nodeIDs := sim.UpNodeIDs()
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for _, n := range nodeIDs {
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//get the kademlia overlay address from this ID
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a := n.Bytes()
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//append it to the array of all overlay addresses
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conf.addrs = append(conf.addrs, a)
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//the proximity calculation is on overlay addr,
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//the p2p/simulations check func triggers on enode.ID,
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//so we need to know which overlay addr maps to which nodeID
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conf.addrToIDMap[string(a)] = n
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}
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//get the node at that index
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//this is the node selected for upload
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node := sim.RandomUpNode()
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item, ok := sim.NodeItem(node.ID, bucketKeyStore)
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if !ok {
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return fmt.Errorf("No localstore")
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}
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lstore := item.(*storage.LocalStore)
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hashes, err := uploadFileToSingleNodeStore(node.ID, chunkCount, lstore)
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if err != nil {
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return err
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}
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for _, h := range hashes {
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evt := &simulations.Event{
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Type: EventTypeChunkCreated,
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Node: sim.Net.GetNode(node.ID),
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Data: h.String(),
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}
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sim.Net.Events().Send(evt)
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}
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conf.hashes = append(conf.hashes, hashes...)
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mapKeysToNodes(conf)
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// File retrieval check is repeated until all uploaded files are retrieved from all nodes
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// or until the timeout is reached.
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var gDir string
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var globalStore *mockdb.GlobalStore
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if *useMockStore {
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gDir, globalStore, err = createGlobalStore()
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if err != nil {
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return fmt.Errorf("Something went wrong; using mockStore enabled but globalStore is nil")
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}
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defer func() {
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os.RemoveAll(gDir)
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err := globalStore.Close()
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if err != nil {
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log.Error("Error closing global store! %v", "err", err)
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}
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}()
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}
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REPEAT:
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for {
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for _, id := range nodeIDs {
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//for each expected chunk, check if it is in the local store
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localChunks := conf.idToChunksMap[id]
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for _, ch := range localChunks {
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//get the real chunk by the index in the index array
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chunk := conf.hashes[ch]
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log.Trace(fmt.Sprintf("node has chunk: %s:", chunk))
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//check if the expected chunk is indeed in the localstore
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var err error
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if *useMockStore {
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//use the globalStore if the mockStore should be used; in that case,
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//the complete localStore stack is bypassed for getting the chunk
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_, err = globalStore.Get(common.BytesToAddress(id.Bytes()), chunk)
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} else {
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//use the actual localstore
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item, ok := sim.NodeItem(id, bucketKeyStore)
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if !ok {
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return fmt.Errorf("Error accessing localstore")
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}
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lstore := item.(*storage.LocalStore)
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_, err = lstore.Get(ctx, chunk)
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}
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if err != nil {
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log.Debug(fmt.Sprintf("Chunk %s NOT found for id %s", chunk, id))
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// Do not get crazy with logging the warn message
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time.Sleep(500 * time.Millisecond)
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continue REPEAT
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}
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evt := &simulations.Event{
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Type: EventTypeChunkArrived,
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Node: sim.Net.GetNode(id),
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Data: chunk.String(),
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}
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sim.Net.Events().Send(evt)
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log.Debug(fmt.Sprintf("Chunk %s IS FOUND for id %s", chunk, id))
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}
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}
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return nil
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}
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})
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}
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/*
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The test generates the given number of chunks
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For every chunk generated, the nearest node addresses
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are identified, we verify that the nodes closer to the
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chunk addresses actually do have the chunks in their local stores.
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The test loads a snapshot file to construct the swarm network,
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assuming that the snapshot file identifies a healthy
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kademlia network. The snapshot should have 'streamer' in its service list.
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*/
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func testSyncingViaDirectSubscribe(t *testing.T, chunkCount int, nodeCount int) error {
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sim := simulation.New(map[string]simulation.ServiceFunc{
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"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
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n := ctx.Config.Node()
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addr := network.NewAddr(n)
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store, datadir, err := createTestLocalStorageForID(n.ID(), addr)
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if err != nil {
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return nil, nil, err
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}
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bucket.Store(bucketKeyStore, store)
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localStore := store.(*storage.LocalStore)
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netStore, err := storage.NewNetStore(localStore, nil)
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if err != nil {
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return nil, nil, err
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}
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kad := network.NewKademlia(addr.Over(), network.NewKadParams())
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delivery := NewDelivery(kad, netStore)
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netStore.NewNetFetcherFunc = network.NewFetcherFactory(dummyRequestFromPeers, true).New
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r := NewRegistry(addr.ID(), delivery, netStore, state.NewInmemoryStore(), &RegistryOptions{
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Retrieval: RetrievalDisabled,
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Syncing: SyncingRegisterOnly,
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})
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bucket.Store(bucketKeyRegistry, r)
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fileStore := storage.NewFileStore(netStore, storage.NewFileStoreParams())
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bucket.Store(bucketKeyFileStore, fileStore)
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cleanup = func() {
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os.RemoveAll(datadir)
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netStore.Close()
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r.Close()
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}
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return r, cleanup, nil
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},
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})
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defer sim.Close()
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ctx, cancelSimRun := context.WithTimeout(context.Background(), 2*time.Minute)
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defer cancelSimRun()
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conf := &synctestConfig{}
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//map of discover ID to indexes of chunks expected at that ID
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conf.idToChunksMap = make(map[enode.ID][]int)
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//map of overlay address to discover ID
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conf.addrToIDMap = make(map[string]enode.ID)
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//array where the generated chunk hashes will be stored
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conf.hashes = make([]storage.Address, 0)
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err := sim.UploadSnapshot(fmt.Sprintf("testing/snapshot_%d.json", nodeCount))
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if err != nil {
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return err
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}
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if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
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return err
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}
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disconnections := sim.PeerEvents(
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context.Background(),
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sim.NodeIDs(),
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simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeDrop),
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)
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go func() {
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for d := range disconnections {
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log.Error("peer drop", "node", d.NodeID, "peer", d.Event.Peer)
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t.Fatal("unexpected disconnect")
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cancelSimRun()
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}
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}()
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result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
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nodeIDs := sim.UpNodeIDs()
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for _, n := range nodeIDs {
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//get the kademlia overlay address from this ID
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a := n.Bytes()
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//append it to the array of all overlay addresses
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conf.addrs = append(conf.addrs, a)
|
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//the proximity calculation is on overlay addr,
|
|
//the p2p/simulations check func triggers on enode.ID,
|
|
//so we need to know which overlay addr maps to which nodeID
|
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conf.addrToIDMap[string(a)] = n
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}
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var subscriptionCount int
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filter := simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeMsgRecv).Protocol("stream").MsgCode(4)
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eventC := sim.PeerEvents(ctx, nodeIDs, filter)
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for j, node := range nodeIDs {
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log.Trace(fmt.Sprintf("Start syncing subscriptions: %d", j))
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//start syncing!
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item, ok := sim.NodeItem(node, bucketKeyRegistry)
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if !ok {
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return fmt.Errorf("No registry")
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}
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registry := item.(*Registry)
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var cnt int
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cnt, err = startSyncing(registry, conf)
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if err != nil {
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return err
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}
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//increment the number of subscriptions we need to wait for
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//by the count returned from startSyncing (SYNC subscriptions)
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subscriptionCount += cnt
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}
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for e := range eventC {
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if e.Error != nil {
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return e.Error
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}
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subscriptionCount--
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if subscriptionCount == 0 {
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break
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}
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}
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//select a random node for upload
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node := sim.RandomUpNode()
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item, ok := sim.NodeItem(node.ID, bucketKeyStore)
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if !ok {
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return fmt.Errorf("No localstore")
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}
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lstore := item.(*storage.LocalStore)
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hashes, err := uploadFileToSingleNodeStore(node.ID, chunkCount, lstore)
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if err != nil {
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return err
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}
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conf.hashes = append(conf.hashes, hashes...)
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mapKeysToNodes(conf)
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|
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if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
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return err
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}
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|
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var gDir string
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var globalStore *mockdb.GlobalStore
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if *useMockStore {
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gDir, globalStore, err = createGlobalStore()
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if err != nil {
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return fmt.Errorf("Something went wrong; using mockStore enabled but globalStore is nil")
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}
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defer os.RemoveAll(gDir)
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}
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// File retrieval check is repeated until all uploaded files are retrieved from all nodes
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// or until the timeout is reached.
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REPEAT:
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for {
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for _, id := range nodeIDs {
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//for each expected chunk, check if it is in the local store
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localChunks := conf.idToChunksMap[id]
|
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for _, ch := range localChunks {
|
|
//get the real chunk by the index in the index array
|
|
chunk := conf.hashes[ch]
|
|
log.Trace(fmt.Sprintf("node has chunk: %s:", chunk))
|
|
//check if the expected chunk is indeed in the localstore
|
|
var err error
|
|
if *useMockStore {
|
|
//use the globalStore if the mockStore should be used; in that case,
|
|
//the complete localStore stack is bypassed for getting the chunk
|
|
_, err = globalStore.Get(common.BytesToAddress(id.Bytes()), chunk)
|
|
} else {
|
|
//use the actual localstore
|
|
item, ok := sim.NodeItem(id, bucketKeyStore)
|
|
if !ok {
|
|
return fmt.Errorf("Error accessing localstore")
|
|
}
|
|
lstore := item.(*storage.LocalStore)
|
|
_, err = lstore.Get(ctx, chunk)
|
|
}
|
|
if err != nil {
|
|
log.Debug(fmt.Sprintf("Chunk %s NOT found for id %s", chunk, id))
|
|
// Do not get crazy with logging the warn message
|
|
time.Sleep(500 * time.Millisecond)
|
|
continue REPEAT
|
|
}
|
|
log.Debug(fmt.Sprintf("Chunk %s IS FOUND for id %s", chunk, id))
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
})
|
|
|
|
if result.Error != nil {
|
|
return result.Error
|
|
}
|
|
|
|
log.Info("Simulation ended")
|
|
return nil
|
|
}
|
|
|
|
//the server func to start syncing
|
|
//issues `RequestSubscriptionMsg` to peers, based on po, by iterating over
|
|
//the kademlia's `EachBin` function.
|
|
//returns the number of subscriptions requested
|
|
func startSyncing(r *Registry, conf *synctestConfig) (int, error) {
|
|
var err error
|
|
kad := r.delivery.kad
|
|
subCnt := 0
|
|
//iterate over each bin and solicit needed subscription to bins
|
|
kad.EachBin(r.addr[:], pof, 0, func(conn *network.Peer, po int) bool {
|
|
//identify begin and start index of the bin(s) we want to subscribe to
|
|
subCnt++
|
|
err = r.RequestSubscription(conf.addrToIDMap[string(conn.Address())], NewStream("SYNC", FormatSyncBinKey(uint8(po)), true), NewRange(0, 0), High)
|
|
if err != nil {
|
|
log.Error(fmt.Sprintf("Error in RequestSubsciption! %v", err))
|
|
return false
|
|
}
|
|
return true
|
|
|
|
})
|
|
return subCnt, nil
|
|
}
|
|
|
|
//map chunk keys to addresses which are responsible
|
|
func mapKeysToNodes(conf *synctestConfig) {
|
|
nodemap := make(map[string][]int)
|
|
//build a pot for chunk hashes
|
|
np := pot.NewPot(nil, 0)
|
|
indexmap := make(map[string]int)
|
|
for i, a := range conf.addrs {
|
|
indexmap[string(a)] = i
|
|
np, _, _ = pot.Add(np, a, pof)
|
|
}
|
|
|
|
var kadMinProxSize = 2
|
|
|
|
ppmap := network.NewPeerPotMap(kadMinProxSize, conf.addrs)
|
|
|
|
//for each address, run EachNeighbour on the chunk hashes pot to identify closest nodes
|
|
log.Trace(fmt.Sprintf("Generated hash chunk(s): %v", conf.hashes))
|
|
for i := 0; i < len(conf.hashes); i++ {
|
|
var a []byte
|
|
np.EachNeighbour([]byte(conf.hashes[i]), pof, func(val pot.Val, po int) bool {
|
|
// take the first address
|
|
a = val.([]byte)
|
|
return false
|
|
})
|
|
|
|
nns := ppmap[common.Bytes2Hex(a)].NNSet
|
|
nns = append(nns, a)
|
|
|
|
for _, p := range nns {
|
|
nodemap[string(p)] = append(nodemap[string(p)], i)
|
|
}
|
|
}
|
|
for addr, chunks := range nodemap {
|
|
//this selects which chunks are expected to be found with the given node
|
|
conf.idToChunksMap[conf.addrToIDMap[addr]] = chunks
|
|
}
|
|
log.Debug(fmt.Sprintf("Map of expected chunks by ID: %v", conf.idToChunksMap))
|
|
}
|
|
|
|
//upload a file(chunks) to a single local node store
|
|
func uploadFileToSingleNodeStore(id enode.ID, chunkCount int, lstore *storage.LocalStore) ([]storage.Address, error) {
|
|
log.Debug(fmt.Sprintf("Uploading to node id: %s", id))
|
|
fileStore := storage.NewFileStore(lstore, storage.NewFileStoreParams())
|
|
size := chunkSize
|
|
var rootAddrs []storage.Address
|
|
for i := 0; i < chunkCount; i++ {
|
|
rk, wait, err := fileStore.Store(context.TODO(), io.LimitReader(crand.Reader, int64(size)), int64(size), false)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
err = wait(context.TODO())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
rootAddrs = append(rootAddrs, (rk))
|
|
}
|
|
|
|
return rootAddrs, nil
|
|
}
|