Stream subscriptions (#18355)
* swarm/network: eachBin now starts at kaddepth for nn * swarm/network: fix Kademlia.EachBin * swarm/network: fix kademlia.EachBin * swarm/network: correct EachBin implementation according to requirements * swarm/network: less addresses simplified tests * swarm: calc kad depth outside loop in EachBin test * swarm/network: removed printResults * swarm/network: cleanup imports * swarm/network: remove kademlia.EachBin; fix RequestSubscriptions and add unit test * swarm/network/stream: address PR comments * swarm/network/stream: package-wide subscriptionFunc * swarm/network/stream: refactor to kad.EachConn
This commit is contained in:
holisticode
Viktor Trón
@ -106,43 +106,6 @@ func TestSyncingViaGlobalSync(t *testing.T) {
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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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@ -323,235 +286,6 @@ func runSim(conf *synctestConfig, ctx context.Context, sim *simulation.Simulatio
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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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}, nil)
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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); 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().Drop(),
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)
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var disconnected atomic.Value
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go func() {
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for d := range disconnections {
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if d.Error != nil {
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log.Error("peer drop", "node", d.NodeID, "peer", d.PeerID)
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disconnected.Store(true)
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}
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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,
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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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var subscriptionCount int
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filter := simulation.NewPeerEventsFilter().ReceivedMessages().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.Net.GetRandomUpNode()
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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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if _, err := sim.WaitTillHealthy(ctx); err != nil {
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return err
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}
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var globalStore mock.GlobalStorer
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if *useMockStore {
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globalStore = mockmem.NewGlobalStore()
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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 {
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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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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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if result.Error != nil {
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return result.Error
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}
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if yes, ok := disconnected.Load().(bool); ok && yes {
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t.Fatal("disconnect events received")
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}
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log.Info("Simulation ended")
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return nil
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}
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//the server func to start syncing
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//issues `RequestSubscriptionMsg` to peers, based on po, by iterating over
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//the kademlia's `EachBin` function.
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//returns the number of subscriptions requested
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func startSyncing(r *Registry, conf *synctestConfig) (int, error) {
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var err error
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kad := r.delivery.kad
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subCnt := 0
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//iterate over each bin and solicit needed subscription to bins
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kad.EachBin(r.addr[:], pof, 0, func(conn *network.Peer, po int) bool {
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//identify begin and start index of the bin(s) we want to subscribe to
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subCnt++
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err = r.RequestSubscription(conf.addrToIDMap[string(conn.Address())], NewStream("SYNC", FormatSyncBinKey(uint8(po)), true), NewRange(0, 0), High)
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if err != nil {
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log.Error(fmt.Sprintf("Error in RequestSubsciption! %v", err))
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return false
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}
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return true
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})
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return subCnt, nil
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}
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//map chunk keys to addresses which are responsible
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func mapKeysToNodes(conf *synctestConfig) {
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nodemap := make(map[string][]int)
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