func (c *cluster) isReplicated() (bool, string) {
db := c.clients[0]
rows, err := db.Scan(keys.Meta2Prefix, keys.Meta2Prefix.PrefixEnd(), 100000)
if err != nil {
log.Fatalf(context.Background(), "scan failed: %s\n", err)
}
var buf bytes.Buffer
tw := tabwriter.NewWriter(&buf, 2, 1, 2, ' ', 0)
done := true
for _, row := range rows {
desc := &roachpb.RangeDescriptor{}
if err := row.ValueProto(desc); err != nil {
log.Fatalf(context.Background(), "%s: unable to unmarshal range descriptor\n", row.Key)
continue
}
var storeIDs []roachpb.StoreID
for _, replica := range desc.Replicas {
storeIDs = append(storeIDs, replica.StoreID)
}
fmt.Fprintf(tw, "\t%s\t%s\t[%d]\t%d\n",
desc.StartKey, desc.EndKey, desc.RangeID, storeIDs)
if len(desc.Replicas) != 3 {
done = false
}
}
_ = tw.Flush()
return done, buf.String()
}
// StartTestServer starts a in-memory test server.
// Adds a permissions config for 'TestUser' under prefix 'TestUser'.
func StartTestServer(t util.Tester) *TestServer {
s := &TestServer{}
if err := s.Start(); err != nil {
if t != nil {
t.Fatalf("Could not start server: %v", err)
} else {
log.Fatalf("Could not start server: %v", err)
}
}
// Setup permissions for a test user.
err := s.WritePermissionConfig(TestUser,
&proto.PermConfig{
Read: []string{TestUser},
Write: []string{TestUser},
})
if err != nil {
if t != nil {
t.Fatalf("Error adding permissions config for %s: %v", TestUser, err)
} else {
log.Fatalf("Error adding permissions config for %s: %v", TestUser, err)
}
}
log.Infof("Test server listening on %s: %s", s.Ctx.RequestScheme(), s.ServingAddr())
return s
}
// connectGossip connects to gossip network and reads cluster ID. If
// this node is already part of a cluster, the cluster ID is verified
// for a match. If not part of a cluster, the cluster ID is set. The
// node's address is gossipped with node ID as the gossip key.
func (n *Node) connectGossip() {
log.Infof("connecting to gossip network to verify cluster ID...")
<-n.gossip.Connected
val, err := n.gossip.GetInfo(gossip.KeyClusterID)
if err != nil || val == nil {
log.Fatalf("unable to ascertain cluster ID from gossip network: %v", err)
}
gossipClusterID := val.(string)
if n.ClusterID == "" {
n.ClusterID = gossipClusterID
} else if n.ClusterID != gossipClusterID {
log.Fatalf("node %d belongs to cluster %q but is attempting to connect to a gossip network for cluster %q",
n.Descriptor.NodeID, n.ClusterID, gossipClusterID)
}
log.Infof("node connected via gossip and verified as part of cluster %q", gossipClusterID)
// Gossip node address keyed by node ID.
if n.Descriptor.NodeID != 0 {
nodeIDKey := gossip.MakeNodeIDGossipKey(n.Descriptor.NodeID)
if err := n.gossip.AddInfo(nodeIDKey, n.Descriptor.Address, ttlNodeIDGossip); err != nil {
log.Errorf("couldn't gossip address for node %d: %v", n.Descriptor.NodeID, err)
}
}
}
// ExampleNewClock shows how to create a new
// hybrid logical clock based on the local machine's
// physical clock. The sanity checks in this example
// will, of course, not fail and the output will be
// the age of the Unix epoch in nanoseconds.
func ExampleNewClock() {
// Initialize a new clock, using the local
// physical clock.
c := NewClock(UnixNano)
// Update the state of the hybrid clock.
s := c.Now()
time.Sleep(50 * time.Nanosecond)
t := proto.Timestamp{WallTime: UnixNano()}
// The sanity checks below will usually never be triggered.
// Timestamp implements the util.Ordered interface.
if s.Less(t) || !t.Less(s) {
log.Fatalf("The later timestamp is smaller than the earlier one")
}
if t.WallTime-s.WallTime > 0 {
log.Fatalf("HLC timestamp %d deviates from physical clock %d", s, t)
}
if s.Logical > 0 {
log.Fatalf("Trivial timestamp has logical component")
}
fmt.Printf("The Unix Epoch is now approximately %dns old.\n", t.WallTime)
}
func (z *zeroSum) verify(d time.Duration) {
for {
time.Sleep(d)
// Grab the count of accounts from committed transactions first. The number
// of accounts found by the SELECT should be at least this number.
committedAccounts := uint64(z.accountsLen())
q := `SELECT count(*), sum(balance) FROM accounts`
var accounts uint64
var total int64
db := z.db[z.randNode(rand.Intn)]
if err := db.QueryRow(q).Scan(&accounts, &total); err != nil {
z.maybeLogError(err)
continue
}
if total != 0 {
log.Fatalf(context.Background(), "unexpected total balance %d", total)
}
if accounts < committedAccounts {
log.Fatalf(context.Background(), "expected at least %d accounts, but found %d",
committedAccounts, accounts)
}
}
}
// initNodeID updates the internal NodeDescriptor with the given ID. If zero is
// supplied, a new NodeID is allocated with the first invocation. For all other
// values, the supplied ID is stored into the descriptor (unless one has been
// set previously, in which case a fatal error occurs).
//
// Upon setting a new NodeID, the descriptor is gossiped and the NodeID is
// stored into the gossip instance.
func (n *Node) initNodeID(id roachpb.NodeID) {
if id < 0 {
log.Fatalf("NodeID must not be negative")
}
if o := n.Descriptor.NodeID; o > 0 {
if id == 0 {
return
}
log.Fatalf("cannot initialize NodeID to %d, already have %d", id, o)
}
var err error
if id == 0 {
id, err = allocateNodeID(n.ctx.DB)
log.Infof("new node allocated ID %d", id)
if err != nil {
log.Fatal(err)
}
if id == 0 {
log.Fatal("new node allocated illegal ID 0")
}
n.ctx.Gossip.SetNodeID(id)
} else {
log.Infof("node ID %d initialized", id)
}
// Gossip the node descriptor to make this node addressable by node ID.
n.Descriptor.NodeID = id
if err = n.ctx.Gossip.SetNodeDescriptor(&n.Descriptor); err != nil {
log.Fatalf("couldn't gossip descriptor for node %d: %s", n.Descriptor.NodeID, err)
}
}
// continuouslyTransferMoney() keeps moving random amounts between
// random accounts.
func (bank *Bank) continuouslyTransferMoney(cash int64) {
for {
from := bank.makeAccountID(rand.Intn(bank.numAccounts))
to := bank.makeAccountID(rand.Intn(bank.numAccounts))
// Continue when from == to.
if bytes.Equal(from, to) {
continue
}
exchangeAmount := rand.Int63n(cash)
// transferMoney transfers exchangeAmount between the two accounts
transferMoney := func(runner client.Runner) *roachpb.Error {
batchRead := &client.Batch{}
batchRead.Get(from)
batchRead.Get(to)
if err := runner.Run(batchRead); err != nil {
return err
}
// Read from value.
fromAccount := &Account{}
if err := fromAccount.decode(batchRead.Results[0].Rows[0].ValueBytes()); err != nil {
log.Fatalf("decoding error: %s", err)
}
// Ensure there is enough cash.
if fromAccount.Balance < exchangeAmount {
return nil
}
// Read to value.
toAccount := &Account{}
if err := toAccount.decode(batchRead.Results[1].Rows[0].ValueBytes()); err != nil {
log.Fatalf("decoding error: %s", err)
}
// Update both accounts.
batchWrite := &client.Batch{}
fromAccount.Balance -= exchangeAmount
toAccount.Balance += exchangeAmount
if fromValue, err := fromAccount.encode(); err != nil {
log.Fatalf("encoding error: %s", err)
} else if toValue, err := toAccount.encode(); err != nil {
log.Fatalf("encoding error: %s", err)
} else {
batchWrite.Put(from, fromValue)
batchWrite.Put(to, toValue)
}
return runner.Run(batchWrite)
}
var err *roachpb.Error
if *useTransaction {
err = bank.db.Txn(func(txn *client.Txn) *roachpb.Error { return transferMoney(txn) })
} else {
err = transferMoney(bank.db)
}
if err != nil {
log.Fatal(err)
}
atomic.AddInt32(&bank.numTransfers, 1)
}
}
func (n *node) start() {
n.Lock()
defer n.Unlock()
if n.Cmd != nil {
return
}
n.Cmd = exec.Command(n.Args[0], n.Args[1:]...)
stdoutPath := filepath.Join(n.LogDir, "stdout")
stdout, err := os.OpenFile(stdoutPath,
os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
log.Fatalf(context.Background(), "unable to open file %s: %s", stdoutPath, err)
}
n.Cmd.Stdout = stdout
stderrPath := filepath.Join(n.LogDir, "stderr")
stderr, err := os.OpenFile(stderrPath,
os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
log.Fatalf(context.Background(), "unable to open file %s: %s", stderrPath, err)
}
n.Cmd.Stderr = stderr
err = n.Cmd.Start()
if n.Cmd.Process != nil {
log.Infof(context.Background(), "process %d started: %s",
n.Cmd.Process.Pid, strings.Join(n.Args, " "))
}
if err != nil {
log.Infof(context.Background(), "%v", err)
_ = stdout.Close()
_ = stderr.Close()
return
}
go func(cmd *exec.Cmd) {
if err := cmd.Wait(); err != nil {
log.Errorf(context.Background(), "waiting for command: %v", err)
}
_ = stdout.Close()
_ = stderr.Close()
ps := cmd.ProcessState
sy := ps.Sys().(syscall.WaitStatus)
log.Infof(context.Background(), "Process %d exited with status %d",
ps.Pid(), sy.ExitStatus())
log.Infof(context.Background(), ps.String())
n.Lock()
n.Cmd = nil
n.Unlock()
}(n.Cmd)
}
func main() {
// Seed the random number generator for non-determinism across
// multiple runs.
randutil.SeedForTests()
if f := flag.Lookup("alsologtostderr"); f != nil {
fmt.Println("Starting simulation. Add -alsologtostderr to see progress.")
}
flag.Parse()
dirName, err := ioutil.TempDir("", "gossip-simulation-")
if err != nil {
log.Fatalf(context.TODO(), "could not create temporary directory for gossip simulation output: %s", err)
}
// Simulation callbacks to run the simulation for cycleCount
// cycles. At each cycle % outputEvery, a dot file showing the
// state of the network graph is output.
nodeCount := 3
switch *size {
case "tiny":
// Use default parameters.
case "small":
nodeCount = 10
case "medium":
nodeCount = 25
case "large":
nodeCount = 50
case "huge":
nodeCount = 100
case "ginormous":
nodeCount = 250
default:
log.Fatalf(context.TODO(), "unknown simulation size: %s", *size)
}
edgeSet := make(map[string]edge)
stopper := stop.NewStopper()
defer stopper.Stop()
n := simulation.NewNetwork(stopper, nodeCount, true)
n.SimulateNetwork(
func(cycle int, network *simulation.Network) bool {
// Output dot graph.
dotFN := fmt.Sprintf("%s/sim-cycle-%03d.dot", dirName, cycle)
_, quiescent := outputDotFile(dotFN, cycle, network, edgeSet)
// Run until network has quiesced.
return !quiescent
},
)
// Output instructions for viewing graphs.
fmt.Printf("To view simulation graph output run (you must install graphviz):\n\nfor f in %s/*.dot ; do circo $f -Tpng -o $f.png ; echo $f.png ; done\n", dirName)
}
// createTestConfigFile creates a temporary file and writes the
// testConfig yaml data to it. The caller is responsible for
// removing it. Returns the filename for a subsequent call to
// os.Remove().
func createTestConfigFile(body string) string {
f, err := ioutil.TempFile("", "test-config")
if err != nil {
log.Fatalf("failed to open temporary file: %v", err)
}
defer f.Close()
if _, err = f.Write([]byte(body)); err != nil {
log.Fatalf("failed to write to temporary file: %v", err)
}
return f.Name()
}
// RegisterSender registers the specified function to be used for
// creation of a new sender when the specified scheme is encountered.
func RegisterSender(scheme string, f NewSenderFunc) {
if f == nil {
log.Fatalf("unable to register nil function for \"%s\"", scheme)
}
sendersMu.Lock()
defer sendersMu.Unlock()
if _, ok := senders[scheme]; ok {
log.Fatalf("sender already registered for \"%s\"", scheme)
}
senders[scheme] = f
}
// tempUnixFile creates a temporary file for use with a unix domain socket.
// TODO(bdarnell): use TempDir instead to make this atomic.
func tempUnixFile() string {
f, err := ioutil.TempFile("", "unix-socket")
if err != nil {
log.Fatalf("unable to create temp file: %s", err)
}
f.Close()
if err := os.Remove(f.Name()); err != nil {
log.Fatalf("unable to remove temp file: %s", err)
}
return f.Name()
}
// ExampleManualClock shows how a manual clock can be
// used as a physical clock. This is useful for testing.
func ExampleManualClock() {
var m ManualClock = 10
c := NewClock(m.UnixNano)
c.Now()
if c.Timestamp().WallTime != 10 {
log.Fatalf("manual clock error")
}
m = 20
c.Now()
if c.Timestamp().WallTime != 20 {
log.Fatalf("manual clock error")
}
}
// ExampleManualClock shows how a manual clock can be
// used as a physical clock. This is useful for testing.
func ExampleManualClock() {
m := NewManualClock(10)
c := NewClock(m.UnixNano)
c.Now()
if c.Timestamp().WallTime != 10 {
log.Fatalf("manual clock error")
}
m.Set(20)
c.Now()
if c.Timestamp().WallTime != 20 {
log.Fatalf("manual clock error")
}
}
// NewNetwork creates nodeCount gossip nodes.
func NewNetwork(nodeCount int, createResolvers bool) *Network {
log.Infof(context.TODO(), "simulating gossip network with %d nodes", nodeCount)
n := &Network{
Nodes: []*Node{},
Stopper: stop.NewStopper(),
}
n.rpcContext = rpc.NewContext(&base.Context{Insecure: true}, nil, n.Stopper)
var err error
n.tlsConfig, err = n.rpcContext.GetServerTLSConfig()
if err != nil {
log.Fatal(context.TODO(), err)
}
for i := 0; i < nodeCount; i++ {
node, err := n.CreateNode()
if err != nil {
log.Fatal(context.TODO(), err)
}
// Build a resolver for each instance or we'll get data races.
if createResolvers {
r, err := resolver.NewResolverFromAddress(n.Nodes[0].Addr())
if err != nil {
log.Fatalf(context.TODO(), "bad gossip address %s: %s", n.Nodes[0].Addr(), err)
}
node.Gossip.SetResolvers([]resolver.Resolver{r})
}
}
return n
}
func (c *cluster) freeze(nodeIdx int, freeze bool) {
addr := c.rpcAddr(nodeIdx)
conn, err := c.rpcCtx.GRPCDial(addr)
if err != nil {
log.Fatalf(context.Background(), "unable to dial: %s: %v", addr, err)
}
adminClient := serverpb.NewAdminClient(conn)
stream, err := adminClient.ClusterFreeze(
context.Background(), &serverpb.ClusterFreezeRequest{Freeze: freeze})
if err != nil {
log.Fatal(context.Background(), err)
}
for {
resp, err := stream.Recv()
if err != nil {
if err == io.EOF {
break
}
log.Fatal(context.Background(), err)
}
fmt.Println(resp.Message)
}
fmt.Println("ok")
}
// CreateLocal creates a new local cockroach cluster. The stopper is used to
// gracefully shutdown the channel (e.g. when a signal arrives). The cluster
// must be started before being used.
func CreateLocal(numLocal, numStores int, logDir string, stopper chan struct{}) *LocalCluster {
select {
case <-stopper:
// The stopper was already closed, exit early.
os.Exit(1)
default:
}
if *cockroachImage == builderImage && !exists(*cockroachBinary) {
log.Fatalf("\"%s\": does not exist", *cockroachBinary)
}
cli, err := dockerclient.NewEnvClient()
maybePanic(err)
return &LocalCluster{
client: cli,
stopper: stopper,
numLocal: numLocal,
numStores: numStores,
// TODO(tschottdorf): deadlocks will occur if these channels fill up.
events: make(chan Event, 1000),
expectedEvents: make(chan Event, 1000),
logDir: logDir,
}
}
// start starts the node by registering the storage instance for the
// RPC service "Node" and initializing stores for each specified
// engine. Launches periodic store gossiping in a goroutine.
func (n *Node) start(rpcServer *rpc.Server, engines []engine.Engine,
attrs proto.Attributes, stopper *util.Stopper) error {
n.initDescriptor(rpcServer.Addr(), attrs)
if err := rpcServer.RegisterName("Node", (*nodeServer)(n)); err != nil {
log.Fatalf("unable to register node service with RPC server: %s", err)
}
// Start status monitor.
n.status.StartMonitorFeed(n.ctx.EventFeed)
stopper.AddCloser(n.ctx.EventFeed)
// Initialize stores, including bootstrapping new ones.
if err := n.initStores(engines, stopper); err != nil {
return err
}
// Pass NodeID to status monitor - this value is initialized in initStores,
// but the StatusMonitor must be active before initStores.
n.status.SetNodeID(n.Descriptor.NodeID)
// Initialize publisher for Node Events.
n.feed = status.NewNodeEventFeed(n.Descriptor.NodeID, n.ctx.EventFeed)
n.startedAt = n.ctx.Clock.Now().WallTime
n.startStoresScanner(stopper)
n.startPublishStatuses(stopper)
n.startGossip(stopper)
log.Infoc(n.context(), "Started node with %v engine(s) and attributes %v", engines, attrs.Attrs)
return nil
}
// strictErrorLog panics in strict mode and logs an error otherwise. Arguments are printf-style
// and will be passed directly to either log.Errorf or log.Fatalf.
func (m *MultiRaft) strictErrorLog(format string, args ...interface{}) {
if m.Strict {
log.Fatalf(format, args...)
} else {
log.Errorf(format, args...)
}
}
// getNextBootstrapAddress returns the next available bootstrap
// address by consulting the first non-exhausted resolver from the
// slice supplied to the constructor or set using setBootstrap().
// The lock is assumed held.
func (g *Gossip) getNextBootstrapAddress() net.Addr {
if len(g.resolvers) == 0 {
log.Fatalf("no resolvers specified for gossip network")
}
// Run through resolvers round robin starting at last resolved index.
for i := 0; i < len(g.resolvers); i++ {
g.resolverIdx = (g.resolverIdx + 1) % len(g.resolvers)
if g.resolverIdx == len(g.resolvers)-1 {
g.triedAll = true
}
resolver := g.resolvers[g.resolverIdx]
addr, err := resolver.GetAddress()
if err != nil {
log.Errorf("invalid bootstrap address: %+v, %v", resolver, err)
continue
} else if addr.String() == g.is.NodeAddr.String() {
// Skip our own node address.
continue
}
_, addrActive := g.bootstrapping[addr.String()]
if !resolver.IsExhausted() || !addrActive {
g.bootstrapping[addr.String()] = struct{}{}
return addr
}
}
return nil
}
// CreateLocal creates a new local cockroach cluster. The stopper is used to
// gracefully shutdown the channel (e.g. when a signal arrives). The cluster
// must be started before being used.
func CreateLocal(cfg TestConfig, logDir string, privileged bool, stopper chan struct{}) *LocalCluster {
select {
case <-stopper:
// The stopper was already closed, exit early.
os.Exit(1)
default:
}
if *cockroachImage == builderImageFull && !exists(*cockroachBinary) {
log.Fatalf("\"%s\": does not exist", *cockroachBinary)
}
cli, err := client.NewEnvClient()
maybePanic(err)
retryingClient := retryingDockerClient{
resilientDockerClient: resilientDockerClient{APIClient: cli},
attempts: 10,
timeout: 10 * time.Second,
}
return &LocalCluster{
client: retryingClient,
stopper: stopper,
config: cfg,
// TODO(tschottdorf): deadlocks will occur if these channels fill up.
events: make(chan Event, 1000),
expectedEvents: make(chan Event, 1000),
logDir: logDir,
privileged: privileged,
}
}
func (lt *localRPCTransport) Listen(id proto.RaftNodeID, server ServerInterface) error {
addr := util.CreateTestAddr("tcp")
rpcServer := crpc.NewServer(addr, &crpc.Context{
Context: base.Context{
Insecure: true,
},
Stopper: lt.stopper,
DisableCache: true,
})
err := rpcServer.RegisterAsync(raftMessageName,
func(argsI gogoproto.Message, callback func(gogoproto.Message, error)) {
protoArgs := argsI.(*proto.RaftMessageRequest)
args := RaftMessageRequest{
GroupID: protoArgs.GroupID,
}
if err := args.Message.Unmarshal(protoArgs.Msg); err != nil {
callback(nil, err)
}
err := server.RaftMessage(&args, &RaftMessageResponse{})
callback(&proto.RaftMessageResponse{}, err)
}, &proto.RaftMessageRequest{})
if err != nil {
return err
}
lt.mu.Lock()
if _, ok := lt.servers[id]; ok {
log.Fatalf("node %d already listening", id)
}
lt.servers[id] = rpcServer
lt.mu.Unlock()
return rpcServer.Start()
}
func Example_node() {
c := newCLITest()
defer c.stop()
// Refresh time series data, which is required to retrieve stats.
if err := c.TestServer.WriteSummaries(); err != nil {
log.Fatalf(context.Background(), "Couldn't write stats summaries: %s", err)
}
c.Run("node ls")
c.Run("node ls --pretty")
c.Run("node status 10000")
// Output:
// node ls
// 1 row
// id
// 1
// node ls --pretty
// +----+
// | id |
// +----+
// | 1 |
// +----+
// (1 row)
// node status 10000
// Error: node 10000 doesn't exist
}
// Start runs the RPC server. After this method returns, the socket
// will have been bound. Use Server.Addr() to ascertain server address.
func (s *Server) Start() error {
ln, err := net.Listen(s.addr.Network(), s.addr.String())
if err != nil {
return err
}
s.listener = ln
s.mu.Lock()
s.addr = ln.Addr()
s.mu.Unlock()
go func() {
// Start serving in a loop until listener is closed.
log.Infof("serving on %+v...", s.Addr())
for {
conn, err := ln.Accept()
if err != nil {
s.mu.Lock()
if !s.closed {
log.Fatalf("server terminated: %s", err)
}
s.mu.Unlock()
break
}
// Serve connection to completion in a goroutine.
go s.serveConn(conn)
}
log.Infof("done serving on %+v", s.Addr())
}()
return nil
}
func ExampleDB_Put_insecure() {
s := &server.TestServer{}
s.Ctx = server.NewTestContext()
s.Ctx.Insecure = true
if pErr := s.Start(); pErr != nil {
log.Fatalf("Could not start server: %v", pErr)
}
defer s.Stop()
db, err := client.Open(s.Stopper(), "rpc://foo@"+s.ServingAddr())
if err != nil {
log.Fatal(err)
}
if pErr := db.Put("aa", "1"); pErr != nil {
panic(pErr)
}
result, pErr := db.Get("aa")
if pErr != nil {
panic(pErr)
}
fmt.Printf("aa=%s\n", result.ValueBytes())
// Output:
// aa=1
}
func (lt *localRPCTransport) Listen(id roachpb.StoreID, server ServerInterface) error {
addr := util.CreateTestAddr("tcp")
rpcServer := crpc.NewServer(addr, &crpc.Context{
Context: base.Context{
Insecure: true,
},
Stopper: lt.stopper,
DisableCache: true,
})
err := rpcServer.RegisterAsync(raftMessageName, false, /*not public*/
func(argsI proto.Message, callback func(proto.Message, error)) {
args := argsI.(*RaftMessageRequest)
resp, err := server.RaftMessage(args)
callback(resp, err)
}, &RaftMessageRequest{})
if err != nil {
return err
}
lt.mu.Lock()
if _, ok := lt.servers[id]; ok {
log.Fatalf("node %d already listening", id)
}
lt.servers[id] = rpcServer
lt.mu.Unlock()
return rpcServer.Start()
}
// runExterminate destroys the data held in the specified stores.
func runExterminate(cmd *cobra.Command, args []string) {
err := Context.Init("exterminate")
if err != nil {
log.Errorf("failed to initialize context: %s", err)
return
}
// First attempt to shutdown the server. Note that an error of EOF just
// means the HTTP server shutdown before the request to quit returned.
if err := server.SendQuit(Context); err != nil {
log.Infof("shutdown node %s: %s", Context.Addr, err)
} else {
log.Infof("shutdown node in anticipation of data extermination")
}
// Exterminate all data held in specified stores.
for _, e := range Context.Engines {
if rocksdb, ok := e.(*engine.RocksDB); ok {
log.Infof("exterminating data from store %s", e)
if err := rocksdb.Destroy(); err != nil {
log.Fatalf("unable to destroy store %s: %s", e, err)
}
}
}
log.Infof("exterminated all data from stores %s", Context.Engines)
}
func verifyBank(db *sql.DB) {
var sum int64
if *aggregate {
if err := db.QueryRow("SELECT SUM(balance) FROM accounts").Scan(&sum); err != nil {
log.Fatal(err)
}
} else {
tx, err := db.Begin()
if err != nil {
log.Fatal(err)
}
rows, err := tx.Query("SELECT balance FROM accounts")
if err != nil {
log.Fatal(err)
}
for rows.Next() {
var balance int64
if err = rows.Scan(&balance); err != nil {
log.Fatal(err)
}
sum += balance
}
if err = tx.Commit(); err != nil {
log.Fatal(err)
}
}
if sum == 0 {
log.Info("The bank is in good order.")
} else {
log.Fatalf("The bank is not in good order. Total value: %d", sum)
}
}
// start starts the node by registering the storage instance for the
// RPC service "Node" and initializing stores for each specified
// engine. Launches periodic store gossiping in a goroutine.
func (n *Node) start(rpcServer *rpc.Server, addr net.Addr, engines []engine.Engine,
attrs roachpb.Attributes, stopper *stop.Stopper) error {
n.initDescriptor(addr, attrs)
const method = "Node.Batch"
if err := rpcServer.Register(method, n.executeCmd, &roachpb.BatchRequest{}); err != nil {
log.Fatalf("unable to register node service with RPC server: %s", err)
}
// Start status monitor.
n.status.StartMonitorFeed(n.ctx.EventFeed)
// Initialize stores, including bootstrapping new ones.
if err := n.initStores(engines, stopper); err != nil {
return err
}
n.startedAt = n.ctx.Clock.Now().WallTime
// Initialize publisher for Node Events. This requires the NodeID, which is
// initialized by initStores(); because of this, some Store initialization
// events will precede the StartNodeEvent on the feed.
n.feed = status.NewNodeEventFeed(n.Descriptor.NodeID, n.ctx.EventFeed)
n.feed.StartNode(n.Descriptor, n.startedAt)
n.startPublishStatuses(stopper)
n.startGossip(stopper)
log.Infoc(n.context(), "Started node with %v engine(s) and attributes %v", engines, attrs.Attrs)
return nil
}
// NewNetwork creates nodeCount gossip nodes.
func NewNetwork(nodeCount int) *Network {
clock := hlc.NewClock(hlc.UnixNano)
log.Infof("simulating gossip network with %d nodes", nodeCount)
n := &Network{
Nodes: []*Node{},
Stopper: stop.NewStopper(),
}
n.rpcContext = rpc.NewContext(&base.Context{Insecure: true}, clock, n.Stopper)
var err error
n.tlsConfig, err = n.rpcContext.GetServerTLSConfig()
if err != nil {
log.Fatal(err)
}
for i := 0; i < nodeCount; i++ {
node, err := n.CreateNode()
if err != nil {
log.Fatal(err)
}
// Build a resolver for each instance or we'll get data races.
r, err := resolver.NewResolverFromAddress(n.Nodes[0].Addr)
if err != nil {
log.Fatalf("bad gossip address %s: %s", n.Nodes[0].Addr, err)
}
node.Gossip.SetResolvers([]resolver.Resolver{r})
if err := n.StartNode(node); err != nil {
log.Fatal(err)
}
}
return n
}