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341 lines
9.8 KiB
341 lines
9.8 KiB
package main
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import (
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"fmt"
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"math/rand"
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"sort"
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"strings"
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e2e "github.com/tendermint/tendermint/test/e2e/pkg"
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"github.com/tendermint/tendermint/types"
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)
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var (
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// testnetCombinations defines global testnet options, where we generate a
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// separate testnet for each combination (Cartesian product) of options.
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testnetCombinations = map[string][]interface{}{
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"topology": {"single", "quad", "large"},
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"queueType": {"priority"}, // "fifo"
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"initialHeight": {0, 1000},
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"initialState": {
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map[string]string{},
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map[string]string{"initial01": "a", "initial02": "b", "initial03": "c"},
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},
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"validators": {"genesis", "initchain"},
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}
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// The following specify randomly chosen values for testnet nodes.
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nodeDatabases = weightedChoice{
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"goleveldb": 35,
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"badgerdb": 35,
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"boltdb": 15,
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"rocksdb": 10,
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"cleveldb": 5,
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}
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nodeABCIProtocols = weightedChoice{
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"builtin": 50,
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"tcp": 20,
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"grpc": 20,
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"unix": 10,
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}
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nodePrivvalProtocols = weightedChoice{
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"file": 50,
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"grpc": 20,
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"tcp": 20,
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"unix": 10,
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}
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nodeStateSyncs = weightedChoice{
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e2e.StateSyncDisabled: 10,
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e2e.StateSyncP2P: 45,
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e2e.StateSyncRPC: 45,
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}
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nodePersistIntervals = uniformChoice{0, 1, 5}
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nodeSnapshotIntervals = uniformChoice{0, 5}
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nodeRetainBlocks = uniformChoice{
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0,
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2 * int(e2e.EvidenceAgeHeight),
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4 * int(e2e.EvidenceAgeHeight),
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}
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nodePerturbations = probSetChoice{
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"disconnect": 0.1,
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"pause": 0.1,
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"kill": 0.1,
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"restart": 0.1,
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}
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evidence = uniformChoice{0, 1, 10}
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txSize = uniformChoice{1024, 4096} // either 1kb or 4kb
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ipv6 = uniformChoice{false, true}
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keyType = uniformChoice{types.ABCIPubKeyTypeEd25519, types.ABCIPubKeyTypeSecp256k1}
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)
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// Generate generates random testnets using the given RNG.
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func Generate(r *rand.Rand, opts Options) ([]e2e.Manifest, error) {
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manifests := []e2e.Manifest{}
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for _, opt := range combinations(testnetCombinations) {
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manifest, err := generateTestnet(r, opt)
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if err != nil {
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return nil, err
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}
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if len(manifest.Nodes) < opts.MinNetworkSize {
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continue
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}
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if opts.MaxNetworkSize > 0 && len(manifest.Nodes) >= opts.MaxNetworkSize {
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continue
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}
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manifests = append(manifests, manifest)
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}
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return manifests, nil
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}
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type Options struct {
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MinNetworkSize int
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MaxNetworkSize int
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NumGroups int
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Directory string
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Reverse bool
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}
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// generateTestnet generates a single testnet with the given options.
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func generateTestnet(r *rand.Rand, opt map[string]interface{}) (e2e.Manifest, error) {
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manifest := e2e.Manifest{
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IPv6: ipv6.Choose(r).(bool),
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ABCIProtocol: nodeABCIProtocols.Choose(r),
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InitialHeight: int64(opt["initialHeight"].(int)),
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InitialState: opt["initialState"].(map[string]string),
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Validators: &map[string]int64{},
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ValidatorUpdates: map[string]map[string]int64{},
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Nodes: map[string]*e2e.ManifestNode{},
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KeyType: keyType.Choose(r).(string),
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Evidence: evidence.Choose(r).(int),
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QueueType: opt["queueType"].(string),
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TxSize: txSize.Choose(r).(int),
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}
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var numSeeds, numValidators, numFulls, numLightClients int
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switch opt["topology"].(string) {
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case "single":
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numValidators = 1
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case "quad":
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numValidators = 4
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case "large":
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// FIXME Networks are kept small since large ones use too much CPU.
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numSeeds = r.Intn(1)
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numLightClients = r.Intn(2)
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numValidators = 4 + r.Intn(4)
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numFulls = r.Intn(4)
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default:
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return manifest, fmt.Errorf("unknown topology %q", opt["topology"])
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}
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// First we generate seed nodes, starting at the initial height.
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for i := 1; i <= numSeeds; i++ {
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node := generateNode(r, manifest, e2e.ModeSeed, 0, false)
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manifest.Nodes[fmt.Sprintf("seed%02d", i)] = node
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}
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var numSyncingNodes = 0
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// Next, we generate validators. We make sure a BFT quorum of validators start
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// at the initial height, and that we have two archive nodes. We also set up
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// the initial validator set, and validator set updates for delayed nodes.
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nextStartAt := manifest.InitialHeight + 5
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quorum := numValidators*2/3 + 1
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for i := 1; i <= numValidators; i++ {
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startAt := int64(0)
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if i > quorum && numSyncingNodes < 2 && r.Float64() >= 0.25 {
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numSyncingNodes++
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startAt = nextStartAt
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nextStartAt += 5
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}
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name := fmt.Sprintf("validator%02d", i)
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node := generateNode(r, manifest, e2e.ModeValidator, startAt, i <= 2)
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manifest.Nodes[name] = node
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if startAt == 0 {
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(*manifest.Validators)[name] = int64(30 + r.Intn(71))
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} else {
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manifest.ValidatorUpdates[fmt.Sprint(startAt+5)] = map[string]int64{
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name: int64(30 + r.Intn(71)),
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}
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}
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}
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// Move validators to InitChain if specified.
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switch opt["validators"].(string) {
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case "genesis":
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case "initchain":
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manifest.ValidatorUpdates["0"] = *manifest.Validators
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manifest.Validators = &map[string]int64{}
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default:
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return manifest, fmt.Errorf("invalid validators option %q", opt["validators"])
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}
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// Finally, we generate random full nodes.
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for i := 1; i <= numFulls; i++ {
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startAt := int64(0)
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if numSyncingNodes < 2 && r.Float64() >= 0.5 {
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numSyncingNodes++
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startAt = nextStartAt
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nextStartAt += 5
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}
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node := generateNode(r, manifest, e2e.ModeFull, startAt, false)
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manifest.Nodes[fmt.Sprintf("full%02d", i)] = node
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}
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// We now set up peer discovery for nodes. Seed nodes are fully meshed with
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// each other, while non-seed nodes either use a set of random seeds or a
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// set of random peers that start before themselves.
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var seedNames, peerNames, lightProviders []string
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for name, node := range manifest.Nodes {
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if node.Mode == string(e2e.ModeSeed) {
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seedNames = append(seedNames, name)
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} else {
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// if the full node or validator is an ideal candidate, it is added as a light provider.
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// There are at least two archive nodes so there should be at least two ideal candidates
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if (node.StartAt == 0 || node.StartAt == manifest.InitialHeight) && node.RetainBlocks == 0 {
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lightProviders = append(lightProviders, name)
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}
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peerNames = append(peerNames, name)
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}
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}
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for _, name := range seedNames {
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for _, otherName := range seedNames {
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if name != otherName {
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manifest.Nodes[name].Seeds = append(manifest.Nodes[name].Seeds, otherName)
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}
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}
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}
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sort.Slice(peerNames, func(i, j int) bool {
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iName, jName := peerNames[i], peerNames[j]
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switch {
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case manifest.Nodes[iName].StartAt < manifest.Nodes[jName].StartAt:
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return true
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case manifest.Nodes[iName].StartAt > manifest.Nodes[jName].StartAt:
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return false
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default:
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return strings.Compare(iName, jName) == -1
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}
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})
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for i, name := range peerNames {
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// there are seeds, statesync is disabled, and it's
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// either the first peer by the sort order, and
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// (randomly half of the remaining peers use a seed
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// node; otherwise, choose some remaining set of the
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// peers.
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if len(seedNames) > 0 &&
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manifest.Nodes[name].StateSync == e2e.StateSyncDisabled &&
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(i == 0 || r.Float64() >= 0.5) {
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// choose one of the seeds
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manifest.Nodes[name].Seeds = uniformSetChoice(seedNames).Choose(r)
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} else if i > 1 && r.Float64() >= 0.5 {
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peers := uniformSetChoice(peerNames[:i])
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manifest.Nodes[name].PersistentPeers = peers.ChooseAtLeast(r, 2)
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}
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}
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// lastly, set up the light clients
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for i := 1; i <= numLightClients; i++ {
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startAt := manifest.InitialHeight + 5
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node := generateLightNode(r, startAt+(5*int64(i)), lightProviders)
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manifest.Nodes[fmt.Sprintf("light%02d", i)] = node
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}
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return manifest, nil
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}
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// generateNode randomly generates a node, with some constraints to avoid
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// generating invalid configurations. We do not set Seeds or PersistentPeers
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// here, since we need to know the overall network topology and startup
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// sequencing.
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func generateNode(
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r *rand.Rand,
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manifest e2e.Manifest,
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mode e2e.Mode,
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startAt int64,
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forceArchive bool,
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) *e2e.ManifestNode {
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node := e2e.ManifestNode{
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Mode: string(mode),
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StartAt: startAt,
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Database: nodeDatabases.Choose(r),
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PrivvalProtocol: nodePrivvalProtocols.Choose(r),
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StateSync: e2e.StateSyncDisabled,
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PersistInterval: ptrUint64(uint64(nodePersistIntervals.Choose(r).(int))),
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SnapshotInterval: uint64(nodeSnapshotIntervals.Choose(r).(int)),
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RetainBlocks: uint64(nodeRetainBlocks.Choose(r).(int)),
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Perturb: nodePerturbations.Choose(r),
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}
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if node.PrivvalProtocol == "" {
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node.PrivvalProtocol = "file"
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}
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if startAt > 0 {
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node.StateSync = nodeStateSyncs.Choose(r)
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if manifest.InitialHeight-startAt <= 5 && node.StateSync == e2e.StateSyncDisabled {
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// avoid needing to blocsync more than five total blocks.
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node.StateSync = uniformSetChoice([]string{
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e2e.StateSyncP2P,
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e2e.StateSyncRPC,
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}).Choose(r)[0]
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}
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}
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// If this node is forced to be an archive node, retain all blocks and
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// enable state sync snapshotting.
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if forceArchive {
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node.RetainBlocks = 0
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node.SnapshotInterval = 3
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}
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// If a node which does not persist state also does not retain blocks, randomly
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// choose to either persist state or retain all blocks.
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if node.PersistInterval != nil && *node.PersistInterval == 0 && node.RetainBlocks > 0 {
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if r.Float64() > 0.5 {
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node.RetainBlocks = 0
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} else {
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node.PersistInterval = ptrUint64(node.RetainBlocks)
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}
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}
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// If either PersistInterval or SnapshotInterval are greater than RetainBlocks,
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// expand the block retention time.
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if node.RetainBlocks > 0 {
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if node.PersistInterval != nil && node.RetainBlocks < *node.PersistInterval {
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node.RetainBlocks = *node.PersistInterval
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}
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if node.RetainBlocks < node.SnapshotInterval {
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node.RetainBlocks = node.SnapshotInterval
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}
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}
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return &node
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}
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func generateLightNode(r *rand.Rand, startAt int64, providers []string) *e2e.ManifestNode {
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return &e2e.ManifestNode{
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Mode: string(e2e.ModeLight),
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StartAt: startAt,
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Database: nodeDatabases.Choose(r),
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PersistInterval: ptrUint64(0),
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PersistentPeers: providers,
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}
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}
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func ptrUint64(i uint64) *uint64 {
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return &i
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}
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