720 lines
22 KiB
Go
720 lines
22 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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"encoding/json"
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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"math/rand"
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"os"
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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/p2p"
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"github.com/ethereum/go-ethereum/p2p/discover"
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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/rpc"
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"github.com/ethereum/go-ethereum/swarm/network"
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streamTesting "github.com/ethereum/go-ethereum/swarm/network/stream/testing"
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"github.com/ethereum/go-ethereum/swarm/pot"
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"github.com/ethereum/go-ethereum/swarm/storage"
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)
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const testMinProxBinSize = 2
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const MaxTimeout = 600
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var (
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pof = pot.DefaultPof(256)
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conf *synctestConfig
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ids []discover.NodeID
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datadirs map[discover.NodeID]string
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ppmap map[string]*network.PeerPot
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live bool
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history bool
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longrunning = flag.Bool("longrunning", false, "do run long-running tests")
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)
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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[discover.NodeID][]int
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chunksToNodesMap map[string][]int
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addrToIdMap map[string]discover.NodeID
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}
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func init() {
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rand.Seed(time.Now().Unix())
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}
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//common_test needs to initialize the test in a init() func
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//in order for adapters to register the NewStreamerService;
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//this service is dependent on some global variables
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//we thus need to initialize first as init() as well.
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func initSyncTest() {
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//assign the toAddr func so NewStreamerService can build the addr
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toAddr = func(id discover.NodeID) *network.BzzAddr {
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addr := network.NewAddrFromNodeID(id)
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return addr
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}
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//global func to create local store
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if *useMockStore {
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createStoreFunc = createMockStore
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} else {
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createStoreFunc = createTestLocalStorageForId
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}
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//local stores
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stores = make(map[discover.NodeID]storage.ChunkStore)
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//data directories for each node and store
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datadirs = make(map[discover.NodeID]string)
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//deliveries for each node
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deliveries = make(map[discover.NodeID]*Delivery)
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//registries, map of discover.NodeID to its streamer
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registries = make(map[discover.NodeID]*TestRegistry)
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//not needed for this test but required from common_test for NewStreamService
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waitPeerErrC = make(chan error)
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//also not needed for this test but required for NewStreamService
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peerCount = func(id discover.NodeID) int {
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if ids[0] == id || ids[len(ids)-1] == id {
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return 1
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}
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return 2
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}
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if *useMockStore {
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createGlobalStore()
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}
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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 TestSyncing(t *testing.T) {
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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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testSyncing(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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testSyncing(t, chnk, n)
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}
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}
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}
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}
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//Do run the tests
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//Every test runs 3 times, a live, a history, and a live AND history
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func testSyncing(t *testing.T, chunkCount int, nodeCount int) {
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//test live and NO history
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log.Info("Testing live and no history")
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live = true
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history = false
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err := runSyncTest(chunkCount, nodeCount, live, history)
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if err != nil {
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t.Fatal(err)
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}
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//test history only
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log.Info("Testing history only")
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live = false
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history = true
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err = runSyncTest(chunkCount, nodeCount, live, history)
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if err != nil {
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t.Fatal(err)
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}
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//finally test live and history
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log.Info("Testing live and history")
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live = true
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err = runSyncTest(chunkCount, nodeCount, live, history)
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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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The test generates the given number of chunks
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The upload is done by dependency to the global
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`live` and `history` variables;
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If `live` is set, first stream subscriptions are established, then
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upload to a random node.
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If `history` is enabled, first upload then build up subscriptions.
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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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For every test run, a series of three tests will be executed:
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- a LIVE test first, where first subscriptions are established,
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then a file (random chunks) is uploaded
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- a HISTORY test, where the file is uploaded first, and then
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the subscriptions are established
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- a crude LIVE AND HISTORY test last, where (different) chunks
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are uploaded twice, once before and once after subscriptions
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*/
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func runSyncTest(chunkCount int, nodeCount int, live bool, history bool) error {
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initSyncTest()
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//the ids of the snapshot nodes, initiate only now as we need nodeCount
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ids = make([]discover.NodeID, nodeCount)
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//initialize the test struct
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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[discover.NodeID][]int)
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//map of overlay address to discover ID
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conf.addrToIdMap = make(map[string]discover.NodeID)
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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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//channel to trigger node checks in the simulation
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trigger := make(chan discover.NodeID)
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//channel to check for disconnection errors
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disconnectC := make(chan error)
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//channel to close disconnection watcher routine
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quitC := make(chan struct{})
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//load nodes from the snapshot file
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net, err := initNetWithSnapshot(nodeCount)
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if err != nil {
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return err
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}
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var rpcSubscriptionsWg sync.WaitGroup
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//do cleanup after test is terminated
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defer func() {
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// close quitC channel to signall all goroutines to clanup
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// before calling simulation network shutdown.
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close(quitC)
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//wait for all rpc subscriptions to unsubscribe
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rpcSubscriptionsWg.Wait()
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//shutdown the snapshot network
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net.Shutdown()
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//after the test, clean up local stores initialized with createLocalStoreForId
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localStoreCleanup()
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//finally clear all data directories
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datadirsCleanup()
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}()
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//get the nodes of the network
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nodes := net.GetNodes()
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//select one index at random...
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idx := rand.Intn(len(nodes))
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//...and get the the node at that index
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//this is the node selected for upload
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node := nodes[idx]
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log.Info("Initializing test config")
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//iterate over all nodes...
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for c := 0; c < len(nodes); c++ {
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//create an array of discovery node IDs
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ids[c] = nodes[c].ID()
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//get the kademlia overlay address from this ID
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a := network.ToOverlayAddr(ids[c].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 discover.NodeID,
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//so we need to know which overlay addr maps to which nodeID
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conf.addrToIdMap[string(a)] = ids[c]
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}
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log.Info("Test config successfully initialized")
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//only needed for healthy call when debugging
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ppmap = network.NewPeerPotMap(testMinProxBinSize, conf.addrs)
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//define the action to be performed before the test checks: start syncing
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action := func(ctx context.Context) error {
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//first run the health check on all nodes,
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//wait until nodes are all healthy
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ticker := time.NewTicker(200 * time.Millisecond)
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defer ticker.Stop()
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for range ticker.C {
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healthy := true
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for _, id := range ids {
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r := registries[id]
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//PeerPot for this node
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addr := common.Bytes2Hex(network.ToOverlayAddr(id.Bytes()))
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pp := ppmap[addr]
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//call Healthy RPC
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h := r.delivery.overlay.Healthy(pp)
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//print info
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log.Debug(r.delivery.overlay.String())
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log.Debug(fmt.Sprintf("IS HEALTHY: %t", h.GotNN && h.KnowNN && h.Full))
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if !h.GotNN || !h.Full {
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healthy = false
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break
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}
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}
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if healthy {
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break
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}
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}
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if history {
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log.Info("Uploading for history")
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//If testing only history, we upload the chunk(s) first
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chunks, err := uploadFileToSingleNodeStore(node.ID(), chunkCount)
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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, chunks...)
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//finally map chunks to the closest addresses
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mapKeysToNodes(conf)
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}
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//variables needed to wait for all subscriptions established before uploading
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errc := make(chan error)
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//now setup and start event watching in order to know when we can upload
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ctx, watchCancel := context.WithTimeout(context.Background(), MaxTimeout*time.Second)
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defer watchCancel()
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log.Info("Setting up stream subscription")
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//We need two iterations, one to subscribe to the subscription events
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//(so we know when setup phase is finished), and one to
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//actually run the stream subscriptions. We can't do it in the same iteration,
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//because while the first nodes in the loop are setting up subscriptions,
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//the latter ones have not subscribed to listen to peer events yet,
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//and then we miss events.
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//first iteration: setup disconnection watcher and subscribe to peer events
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for j, id := range ids {
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log.Trace(fmt.Sprintf("Subscribe to subscription events: %d", j))
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client, err := net.GetNode(id).Client()
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if err != nil {
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return err
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}
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wsDoneC := watchSubscriptionEvents(ctx, id, client, errc, quitC)
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// doneC is nil, the error happened which is sent to errc channel, already
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if wsDoneC == nil {
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continue
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}
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rpcSubscriptionsWg.Add(1)
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go func() {
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<-wsDoneC
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rpcSubscriptionsWg.Done()
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}()
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//watch for peers disconnecting
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wdDoneC, err := streamTesting.WatchDisconnections(id, client, disconnectC, quitC)
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if err != nil {
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return err
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}
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rpcSubscriptionsWg.Add(1)
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go func() {
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<-wdDoneC
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rpcSubscriptionsWg.Done()
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}()
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}
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//second iteration: start syncing
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for j, id := range ids {
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log.Trace(fmt.Sprintf("Start syncing subscriptions: %d", j))
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client, err := net.GetNode(id).Client()
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if err != nil {
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return err
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}
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//start syncing!
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var cnt int
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err = client.CallContext(ctx, &cnt, "stream_startSyncing")
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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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//now wait until the number of expected subscriptions has been finished
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//`watchSubscriptionEvents` will write with a `nil` value to errc
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for err := range errc {
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if err != nil {
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return err
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}
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//`nil` received, decrement count
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subscriptionCount--
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//all subscriptions received
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if subscriptionCount == 0 {
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break
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}
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}
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log.Info("Stream subscriptions successfully requested")
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if live {
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//now upload the chunks to the selected random single node
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hashes, err := uploadFileToSingleNodeStore(node.ID(), chunkCount)
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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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//finally map chunks to the closest addresses
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log.Debug(fmt.Sprintf("Uploaded chunks for live syncing: %v", conf.hashes))
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mapKeysToNodes(conf)
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log.Info(fmt.Sprintf("Uploaded %d chunks to random single node", chunkCount))
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}
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log.Info("Action terminated")
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return nil
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}
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//check defines what will be checked during the test
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check := func(ctx context.Context, id discover.NodeID) (bool, error) {
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select {
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case <-ctx.Done():
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return false, ctx.Err()
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case e := <-disconnectC:
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log.Error(e.Error())
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return false, fmt.Errorf("Disconnect event detected, network unhealthy")
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default:
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}
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log.Trace(fmt.Sprintf("Checking node: %s", id))
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//select the local store for the given node
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//if there are more than one chunk, test only succeeds if all expected chunks are found
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allSuccess := true
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//all the chunk indexes which are supposed to be found for this node
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localChunks := conf.idToChunksMap[id]
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//for each expected chunk, check if it is in the local store
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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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if globalStore == nil {
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return false, fmt.Errorf("Something went wrong; using mockStore enabled but globalStore is nil")
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}
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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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lstore := stores[id]
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_, err = lstore.Get(chunk)
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}
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if err != nil {
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log.Warn(fmt.Sprintf("Chunk %s NOT found for id %s", chunk, id))
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allSuccess = false
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} else {
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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 allSuccess, nil
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}
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//for each tick, run the checks on all nodes
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timingTicker := time.NewTicker(time.Second * 1)
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defer timingTicker.Stop()
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go func() {
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for range timingTicker.C {
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for i := 0; i < len(ids); i++ {
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log.Trace(fmt.Sprintf("triggering step %d, id %s", i, ids[i]))
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trigger <- ids[i]
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}
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}
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}()
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log.Info("Starting simulation run...")
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timeout := MaxTimeout * time.Second
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ctx, cancel := context.WithTimeout(context.Background(), timeout)
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defer cancel()
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//run the simulation
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result := simulations.NewSimulation(net).Run(ctx, &simulations.Step{
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Action: action,
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Trigger: trigger,
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Expect: &simulations.Expectation{
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Nodes: ids,
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Check: check,
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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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log.Info("Simulation terminated")
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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 (r *TestRegistry) StartSyncing(ctx context.Context) (int, error) {
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var err error
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if log.Lvl(*loglevel) == log.LvlDebug {
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//PeerPot for this node
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addr := common.Bytes2Hex(r.addr.OAddr)
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pp := ppmap[addr]
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//call Healthy RPC
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h := r.delivery.overlay.Healthy(pp)
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//print info
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log.Debug(r.delivery.overlay.String())
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log.Debug(fmt.Sprintf("IS HEALTHY: %t", h.GotNN && h.KnowNN && h.Full))
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}
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kad, ok := r.delivery.overlay.(*network.Kademlia)
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if !ok {
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return 0, fmt.Errorf("Not a Kademlia!")
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}
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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.Over(), pof, 0, func(conn network.OverlayConn, po int) bool {
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//identify begin and start index of the bin(s) we want to subscribe to
|
|
log.Debug(fmt.Sprintf("Requesting subscription by: registry %s from peer %s for bin: %d", r.addr.ID(), conf.addrToIdMap[string(conn.Address())], po))
|
|
var histRange *Range
|
|
if history {
|
|
histRange = &Range{}
|
|
}
|
|
|
|
subCnt++
|
|
err = r.RequestSubscription(conf.addrToIdMap[string(conn.Address())], NewStream("SYNC", FormatSyncBinKey(uint8(po)), live), histRange, Top)
|
|
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) {
|
|
kmap := make(map[string][]int)
|
|
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)
|
|
}
|
|
//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++ {
|
|
pl := 256 //highest possible proximity
|
|
var nns []int
|
|
np.EachNeighbour([]byte(conf.hashes[i]), pof, func(val pot.Val, po int) bool {
|
|
a := val.([]byte)
|
|
if pl < 256 && pl != po {
|
|
return false
|
|
}
|
|
if pl == 256 || pl == po {
|
|
log.Trace(fmt.Sprintf("appending %s", conf.addrToIdMap[string(a)]))
|
|
nns = append(nns, indexmap[string(a)])
|
|
nodemap[string(a)] = append(nodemap[string(a)], i)
|
|
}
|
|
if pl == 256 && len(nns) >= testMinProxBinSize {
|
|
//maxProxBinSize has been reached at this po, so save it
|
|
//we will add all other nodes at the same po
|
|
pl = po
|
|
}
|
|
return true
|
|
})
|
|
kmap[string(conf.hashes[i])] = nns
|
|
}
|
|
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))
|
|
conf.chunksToNodesMap = kmap
|
|
}
|
|
|
|
//upload a file(chunks) to a single local node store
|
|
func uploadFileToSingleNodeStore(id discover.NodeID, chunkCount int) ([]storage.Address, error) {
|
|
log.Debug(fmt.Sprintf("Uploading to node id: %s", id))
|
|
lstore := stores[id]
|
|
size := chunkSize
|
|
fileStore := storage.NewFileStore(lstore, storage.NewFileStoreParams())
|
|
var rootAddrs []storage.Address
|
|
for i := 0; i < chunkCount; i++ {
|
|
rk, wait, err := fileStore.Store(io.LimitReader(crand.Reader, int64(size)), int64(size), false)
|
|
wait()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
rootAddrs = append(rootAddrs, (rk))
|
|
}
|
|
|
|
return rootAddrs, nil
|
|
}
|
|
|
|
//initialize a network from a snapshot
|
|
func initNetWithSnapshot(nodeCount int) (*simulations.Network, error) {
|
|
|
|
var a adapters.NodeAdapter
|
|
//add the streamer service to the node adapter
|
|
|
|
if *adapter == "exec" {
|
|
dirname, err := ioutil.TempDir(".", "")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
a = adapters.NewExecAdapter(dirname)
|
|
} else if *adapter == "tcp" {
|
|
a = adapters.NewTCPAdapter(services)
|
|
} else if *adapter == "sim" {
|
|
a = adapters.NewSimAdapter(services)
|
|
}
|
|
|
|
log.Info("Setting up Snapshot network")
|
|
|
|
net := simulations.NewNetwork(a, &simulations.NetworkConfig{
|
|
ID: "0",
|
|
DefaultService: "streamer",
|
|
})
|
|
|
|
f, err := os.Open(fmt.Sprintf("testing/snapshot_%d.json", nodeCount))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer f.Close()
|
|
jsonbyte, err := ioutil.ReadAll(f)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var snap simulations.Snapshot
|
|
err = json.Unmarshal(jsonbyte, &snap)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
//the snapshot probably has the property EnableMsgEvents not set
|
|
//just in case, set it to true!
|
|
//(we need this to wait for messages before uploading)
|
|
for _, n := range snap.Nodes {
|
|
n.Node.Config.EnableMsgEvents = true
|
|
}
|
|
|
|
log.Info("Waiting for p2p connections to be established...")
|
|
|
|
//now we can load the snapshot
|
|
err = net.Load(&snap)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
log.Info("Snapshot loaded")
|
|
return net, nil
|
|
}
|
|
|
|
//we want to wait for subscriptions to be established before uploading to test
|
|
//that live syncing is working correctly
|
|
func watchSubscriptionEvents(ctx context.Context, id discover.NodeID, client *rpc.Client, errc chan error, quitC chan struct{}) (doneC <-chan struct{}) {
|
|
events := make(chan *p2p.PeerEvent)
|
|
sub, err := client.Subscribe(context.Background(), "admin", events, "peerEvents")
|
|
if err != nil {
|
|
log.Error(err.Error())
|
|
errc <- fmt.Errorf("error getting peer events for node %v: %s", id, err)
|
|
return
|
|
}
|
|
c := make(chan struct{})
|
|
|
|
go func() {
|
|
defer func() {
|
|
log.Trace("watch subscription events: unsubscribe", "id", id)
|
|
sub.Unsubscribe()
|
|
close(c)
|
|
}()
|
|
|
|
for {
|
|
select {
|
|
case <-quitC:
|
|
return
|
|
case <-ctx.Done():
|
|
select {
|
|
case errc <- ctx.Err():
|
|
case <-quitC:
|
|
}
|
|
return
|
|
case e := <-events:
|
|
//just catch SubscribeMsg
|
|
if e.Type == p2p.PeerEventTypeMsgRecv && e.Protocol == "stream" && e.MsgCode != nil && *e.MsgCode == 4 {
|
|
errc <- nil
|
|
}
|
|
case err := <-sub.Err():
|
|
if err != nil {
|
|
select {
|
|
case errc <- fmt.Errorf("error getting peer events for node %v: %v", id, err):
|
|
case <-quitC:
|
|
}
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}()
|
|
return c
|
|
}
|
|
|
|
//create a local store for the given node
|
|
func createTestLocalStorageForId(id discover.NodeID, addr *network.BzzAddr) (storage.ChunkStore, error) {
|
|
var datadir string
|
|
var err error
|
|
datadir, err = ioutil.TempDir("", fmt.Sprintf("syncer-test-%s", id.TerminalString()))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
datadirs[id] = datadir
|
|
var store storage.ChunkStore
|
|
params := storage.NewDefaultLocalStoreParams()
|
|
params.ChunkDbPath = datadir
|
|
params.BaseKey = addr.Over()
|
|
store, err = storage.NewTestLocalStoreForAddr(params)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return store, nil
|
|
}
|