// NewNetwork creates nodeCount gossip nodes.
func NewNetwork(stopper *stop.Stopper, nodeCount int, createResolvers bool) *Network {
log.Infof(context.TODO(), "simulating gossip network with %d nodes", nodeCount)
n := &Network{
Nodes: []*Node{},
Stopper: stopper,
}
n.rpcContext = rpc.NewContext(
log.AmbientContext{},
&base.Config{Insecure: true},
hlc.NewClock(hlc.UnixNano, time.Nanosecond),
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
}
// createTestNode creates an rpc server using the specified address,
// gossip instance, KV database and a node using the specified slice
// of engines. The server, clock and node are returned. If gossipBS is
// not nil, the gossip bootstrap address is set to gossipBS.
func createTestNode(
addr net.Addr, engines []engine.Engine, gossipBS net.Addr, t *testing.T,
) (*grpc.Server, net.Addr, *hlc.Clock, *Node, *stop.Stopper) {
cfg := storage.StoreConfig{}
stopper := stop.NewStopper()
cfg.Clock = hlc.NewClock(hlc.UnixNano)
nodeRPCContext := rpc.NewContext(log.AmbientContext{}, nodeTestBaseContext, cfg.Clock, stopper)
cfg.ScanInterval = 10 * time.Hour
cfg.ConsistencyCheckInterval = 10 * time.Hour
grpcServer := rpc.NewServer(nodeRPCContext)
serverCfg := makeTestConfig()
cfg.Gossip = gossip.NewTest(
0,
nodeRPCContext,
grpcServer,
serverCfg.GossipBootstrapResolvers,
stopper,
metric.NewRegistry(),
)
ln, err := netutil.ListenAndServeGRPC(stopper, grpcServer, addr)
if err != nil {
t.Fatal(err)
}
if gossipBS != nil {
// Handle possibility of a :0 port specification.
if gossipBS.Network() == addr.Network() && gossipBS.String() == addr.String() {
gossipBS = ln.Addr()
}
r, err := resolver.NewResolverFromAddress(gossipBS)
if err != nil {
t.Fatalf("bad gossip address %s: %s", gossipBS, err)
}
cfg.Gossip.SetResolvers([]resolver.Resolver{r})
cfg.Gossip.Start(ln.Addr())
}
retryOpts := base.DefaultRetryOptions()
retryOpts.Closer = stopper.ShouldQuiesce()
distSender := kv.NewDistSender(kv.DistSenderConfig{
Clock: cfg.Clock,
RPCContext: nodeRPCContext,
RPCRetryOptions: &retryOpts,
}, cfg.Gossip)
cfg.AmbientCtx.Tracer = tracing.NewTracer()
sender := kv.NewTxnCoordSender(
cfg.AmbientCtx,
distSender,
cfg.Clock,
false,
stopper,
kv.MakeTxnMetrics(metric.TestSampleInterval),
)
cfg.DB = client.NewDB(sender)
cfg.Transport = storage.NewDummyRaftTransport()
cfg.MetricsSampleInterval = metric.TestSampleInterval
node := NewNode(cfg, status.NewMetricsRecorder(cfg.Clock), metric.NewRegistry(), stopper,
kv.MakeTxnMetrics(metric.TestSampleInterval), sql.MakeEventLogger(nil))
roachpb.RegisterInternalServer(grpcServer, node)
return grpcServer, ln.Addr(), cfg.Clock, node, stopper
}
// TestGossipStorage verifies that a gossip node can join the cluster
// using the bootstrap hosts in a gossip.Storage object.
func TestGossipStorage(t *testing.T) {
defer leaktest.AfterTest(t)()
stopper := stop.NewStopper()
defer stopper.Stop()
network := simulation.NewNetwork(stopper, 3, true)
// Set storage for each of the nodes.
addresses := make(unresolvedAddrSlice, len(network.Nodes))
stores := make([]testStorage, len(network.Nodes))
for i, n := range network.Nodes {
addresses[i] = util.MakeUnresolvedAddr(n.Addr().Network(), n.Addr().String())
if err := n.Gossip.SetStorage(&stores[i]); err != nil {
t.Fatal(err)
}
}
// Wait for the gossip network to connect.
network.RunUntilFullyConnected()
// Wait long enough for storage to get the expected number of addresses.
testutils.SucceedsSoon(t, func() error {
for i := range stores {
p := &stores[i]
if expected, actual := len(network.Nodes)-1 /* -1 is ourself */, p.Len(); expected != actual {
return errors.Errorf("expected %v, got %v (info: %#v)", expected, actual, p.Info().Addresses)
}
}
return nil
})
for i := range stores {
p := &stores[i]
if !p.isRead() {
t.Errorf("%d: expected read from storage", i)
}
if !p.isWrite() {
t.Errorf("%d: expected write from storage", i)
}
p.Lock()
gotAddresses := unresolvedAddrSlice(p.info.Addresses)
sort.Sort(gotAddresses)
var expectedAddresses unresolvedAddrSlice
for j, addr := range addresses {
if i != j { // skip node's own address
expectedAddresses = append(expectedAddresses, addr)
}
}
sort.Sort(expectedAddresses)
// Verify all gossip addresses are written to each persistent store.
if !reflect.DeepEqual(gotAddresses, expectedAddresses) {
t.Errorf("%d: expected addresses: %s, got: %s", i, expectedAddresses, gotAddresses)
}
p.Unlock()
}
// Create an unaffiliated gossip node with only itself as a resolver,
// leaving it no way to reach the gossip network.
node, err := network.CreateNode()
if err != nil {
t.Fatal(err)
}
node.Gossip.SetBootstrapInterval(1 * time.Millisecond)
r, err := resolver.NewResolverFromAddress(node.Addr())
if err != nil {
t.Fatal(err)
}
node.Gossip.SetResolvers([]resolver.Resolver{r})
if err := network.StartNode(node); err != nil {
t.Fatal(err)
}
// Wait for a bit to ensure no connection.
select {
case <-time.After(10 * time.Millisecond):
// expected outcome...
case <-node.Gossip.Connected:
t.Fatal("unexpectedly connected to gossip")
}
// Give the new node storage with info established from a node
// in the established network.
var ts2 testStorage
if err := stores[0].ReadBootstrapInfo(&ts2.info); err != nil {
t.Fatal(err)
}
if err := node.Gossip.SetStorage(&ts2); err != nil {
t.Fatal(err)
}
network.SimulateNetwork(func(cycle int, network *simulation.Network) bool {
if cycle > 1000 {
t.Fatal("failed to connect to gossip")
}
select {
case <-node.Gossip.Connected:
return false
default:
return true
}
})
testutils.SucceedsSoon(t, func() error {
if expected, actual := len(network.Nodes)-1 /* -1 is ourself */, ts2.Len(); expected != actual {
return errors.Errorf("expected %v, got %v (info: %#v)", expected, actual, ts2.Info().Addresses)
}
return nil
})
}