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Copy pathevents_test.go
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events_test.go
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// Copyright 2018-2024 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"bytes"
"crypto/sha256"
"encoding/json"
"errors"
"fmt"
"math/rand"
"net/http"
"net/http/httptest"
"os"
"reflect"
"strings"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/nats-io/jwt/v2"
"github.com/nats-io/nats.go"
"github.com/nats-io/nkeys"
"github.com/nats-io/nuid"
)
func createAccount(s *Server) (*Account, nkeys.KeyPair) {
okp, _ := nkeys.FromSeed(oSeed)
akp, _ := nkeys.CreateAccount()
pub, _ := akp.PublicKey()
nac := jwt.NewAccountClaims(pub)
jwt, _ := nac.Encode(okp)
addAccountToMemResolver(s, pub, jwt)
acc, err := s.LookupAccount(pub)
if err != nil {
panic(err)
}
return acc, akp
}
func createUserCredsEx(t *testing.T, nuc *jwt.UserClaims, akp nkeys.KeyPair) nats.Option {
t.Helper()
kp, _ := nkeys.CreateUser()
nuc.Subject, _ = kp.PublicKey()
ujwt, err := nuc.Encode(akp)
if err != nil {
t.Fatalf("Error generating user JWT: %v", err)
}
userCB := func() (string, error) {
return ujwt, nil
}
sigCB := func(nonce []byte) ([]byte, error) {
sig, _ := kp.Sign(nonce)
return sig, nil
}
return nats.UserJWT(userCB, sigCB)
}
func createUserCreds(t *testing.T, _ *Server, akp nkeys.KeyPair) nats.Option {
return createUserCredsEx(t, jwt.NewUserClaims("test"), akp)
}
func runTrustedServer(t *testing.T) (*Server, *Options) {
t.Helper()
opts := DefaultOptions()
kp, _ := nkeys.FromSeed(oSeed)
pub, _ := kp.PublicKey()
opts.TrustedKeys = []string{pub}
opts.AccountResolver = &MemAccResolver{}
s := RunServer(opts)
return s, opts
}
func runTrustedCluster(t *testing.T) (*Server, *Options, *Server, *Options, nkeys.KeyPair) {
t.Helper()
kp, _ := nkeys.FromSeed(oSeed)
pub, _ := kp.PublicKey()
mr := &MemAccResolver{}
// Now create a system account.
// NOTE: This can NOT be shared directly between servers.
// Set via server options.
okp, _ := nkeys.FromSeed(oSeed)
akp, _ := nkeys.CreateAccount()
apub, _ := akp.PublicKey()
nac := jwt.NewAccountClaims(apub)
jwt, _ := nac.Encode(okp)
mr.Store(apub, jwt)
optsA := DefaultOptions()
optsA.Cluster.Name = "TEST CLUSTER 22"
optsA.Cluster.Host = "127.0.0.1"
optsA.TrustedKeys = []string{pub}
optsA.AccountResolver = mr
optsA.SystemAccount = apub
optsA.ServerName = "A_SRV"
// Add in dummy gateway
optsA.Gateway.Name = "TEST CLUSTER 22"
optsA.Gateway.Host = "127.0.0.1"
optsA.Gateway.Port = -1
optsA.gatewaysSolicitDelay = 30 * time.Second
sa := RunServer(optsA)
optsB := nextServerOpts(optsA)
optsB.ServerName = "B_SRV"
optsB.Routes = RoutesFromStr(fmt.Sprintf("nats://%s:%d", optsA.Cluster.Host, optsA.Cluster.Port))
sb := RunServer(optsB)
checkClusterFormed(t, sa, sb)
return sa, optsA, sb, optsB, akp
}
func runTrustedGateways(t *testing.T) (*Server, *Options, *Server, *Options, nkeys.KeyPair) {
t.Helper()
kp, _ := nkeys.FromSeed(oSeed)
pub, _ := kp.PublicKey()
mr := &MemAccResolver{}
// Now create a system account.
// NOTE: This can NOT be shared directly between servers.
// Set via server options.
okp, _ := nkeys.FromSeed(oSeed)
akp, _ := nkeys.CreateAccount()
apub, _ := akp.PublicKey()
nac := jwt.NewAccountClaims(apub)
jwt, _ := nac.Encode(okp)
mr.Store(apub, jwt)
optsA := testDefaultOptionsForGateway("A")
optsA.Cluster.Name = "A"
optsA.Cluster.Host = "127.0.0.1"
optsA.TrustedKeys = []string{pub}
optsA.AccountResolver = mr
optsA.SystemAccount = apub
sa := RunServer(optsA)
optsB := testGatewayOptionsFromToWithServers(t, "B", "A", sa)
optsB.Cluster.Name = "B"
optsB.TrustedKeys = []string{pub}
optsB.AccountResolver = mr
optsB.SystemAccount = apub
sb := RunServer(optsB)
waitForInboundGateways(t, sa, 1, time.Second)
waitForOutboundGateways(t, sa, 1, time.Second)
waitForInboundGateways(t, sb, 1, time.Second)
waitForOutboundGateways(t, sb, 1, time.Second)
return sa, optsA, sb, optsB, akp
}
func TestSystemAccount(t *testing.T) {
s, _ := runTrustedServer(t)
defer s.Shutdown()
acc, _ := createAccount(s)
s.setSystemAccount(acc)
s.mu.Lock()
defer s.mu.Unlock()
if s.sys == nil || s.sys.account == nil {
t.Fatalf("Expected sys.account to be non-nil")
}
if s.sys.client == nil {
t.Fatalf("Expected sys.client to be non-nil")
}
s.sys.client.mu.Lock()
defer s.sys.client.mu.Unlock()
if s.sys.client.echo {
t.Fatalf("Internal clients should always have echo false")
}
}
func TestSystemAccountNewConnection(t *testing.T) {
s, opts := runTrustedServer(t)
defer s.Shutdown()
acc, akp := createAccount(s)
s.setSystemAccount(acc)
url := fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port)
ncs, err := nats.Connect(url, createUserCreds(t, s, akp))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer ncs.Close()
// We may not be able to hear ourselves (if the event is processed
// before we create the sub), so we need to create a second client to
// trigger the connect/disconnect events.
acc2, akp2 := createAccount(s)
// Be explicit to only receive the event for acc2.
sub, _ := ncs.SubscribeSync(fmt.Sprintf("$SYS.ACCOUNT.%s.>", acc2.Name))
defer sub.Unsubscribe()
ncs.Flush()
nc, err := nats.Connect(url, createUserCreds(t, s, akp2), nats.Name("TEST EVENTS"))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer nc.Close()
msg, err := sub.NextMsg(time.Second)
if err != nil {
t.Fatalf("Error receiving msg: %v", err)
}
connsMsg, err := sub.NextMsg(time.Second)
if err != nil {
t.Fatalf("Error receiving msg: %v", err)
}
if strings.HasPrefix(msg.Subject, fmt.Sprintf("$SYS.ACCOUNT.%s.SERVER.CONNS", acc2.Name)) {
msg, connsMsg = connsMsg, msg
}
if !strings.HasPrefix(connsMsg.Subject, fmt.Sprintf("$SYS.ACCOUNT.%s.SERVER.CONNS", acc2.Name)) {
t.Fatalf("Expected subject to start with %q, got %q", "$SYS.ACCOUNT.<account>.CONNECT", msg.Subject)
}
conns := AccountNumConns{}
if err := json.Unmarshal(connsMsg.Data, &conns); err != nil {
t.Fatalf("Error unmarshalling conns event message: %v", err)
} else if conns.Account != acc2.Name {
t.Fatalf("Wrong account in conns message: %v", conns)
} else if conns.Conns != 1 || conns.TotalConns != 1 || conns.LeafNodes != 0 {
t.Fatalf("Wrong counts in conns message: %v", conns)
}
if !strings.HasPrefix(msg.Subject, fmt.Sprintf("$SYS.ACCOUNT.%s.CONNECT", acc2.Name)) {
t.Fatalf("Expected subject to start with %q, got %q", "$SYS.ACCOUNT.<account>.CONNECT", msg.Subject)
}
tokens := strings.Split(msg.Subject, ".")
if len(tokens) < 4 {
t.Fatalf("Expected 4 tokens, got %d", len(tokens))
}
account := tokens[2]
if account != acc2.Name {
t.Fatalf("Expected %q for account, got %q", acc2.Name, account)
}
cem := ConnectEventMsg{}
if err := json.Unmarshal(msg.Data, &cem); err != nil {
t.Fatalf("Error unmarshalling connect event message: %v", err)
}
if cem.Type != ConnectEventMsgType {
t.Fatalf("Incorrect schema in connect event: %s", cem.Type)
}
if cem.Time.IsZero() {
t.Fatalf("Event time is not set")
}
if len(cem.ID) != 22 {
t.Fatalf("Event ID is incorrectly set to len %d", len(cem.ID))
}
if cem.Server.ID != s.ID() {
t.Fatalf("Expected server to be %q, got %q", s.ID(), cem.Server.ID)
}
if cem.Server.Seq == 0 {
t.Fatalf("Expected sequence to be non-zero")
}
if cem.Client.Name != "TEST EVENTS" {
t.Fatalf("Expected client name to be %q, got %q", "TEST EVENTS", cem.Client.Name)
}
if cem.Client.Lang != "go" {
t.Fatalf("Expected client lang to be \"go\", got %q", cem.Client.Lang)
}
// Now close the other client. Should fire a disconnect event.
// First send and receive some messages.
sub2, _ := nc.SubscribeSync("foo")
defer sub2.Unsubscribe()
sub3, _ := nc.SubscribeSync("*")
defer sub3.Unsubscribe()
for i := 0; i < 10; i++ {
nc.Publish("foo", []byte("HELLO WORLD"))
}
nc.Flush()
nc.Close()
msg, err = sub.NextMsg(time.Second)
if err != nil {
t.Fatalf("Error receiving msg: %v", err)
}
connsMsg, err = sub.NextMsg(time.Second)
if err != nil {
t.Fatalf("Error receiving msg: %v", err)
}
if strings.HasPrefix(msg.Subject, fmt.Sprintf("$SYS.ACCOUNT.%s.SERVER.CONNS", acc2.Name)) {
msg, connsMsg = connsMsg, msg
}
if !strings.HasPrefix(connsMsg.Subject, fmt.Sprintf("$SYS.ACCOUNT.%s.SERVER.CONNS", acc2.Name)) {
t.Fatalf("Expected subject to start with %q, got %q", "$SYS.ACCOUNT.<account>.CONNECT", msg.Subject)
} else if !strings.Contains(string(connsMsg.Data), `"total_conns":0`) {
t.Fatalf("Expected event to reflect created connection, got: %s", string(connsMsg.Data))
}
conns = AccountNumConns{}
if err := json.Unmarshal(connsMsg.Data, &conns); err != nil {
t.Fatalf("Error unmarshalling conns event message: %v", err)
} else if conns.Account != acc2.Name {
t.Fatalf("Wrong account in conns message: %v", conns)
} else if conns.Conns != 0 || conns.TotalConns != 0 || conns.LeafNodes != 0 {
t.Fatalf("Wrong counts in conns message: %v", conns)
}
if !strings.HasPrefix(msg.Subject, fmt.Sprintf("$SYS.ACCOUNT.%s.DISCONNECT", acc2.Name)) {
t.Fatalf("Expected subject to start with %q, got %q", "$SYS.ACCOUNT.<account>.DISCONNECT", msg.Subject)
}
tokens = strings.Split(msg.Subject, ".")
if len(tokens) < 4 {
t.Fatalf("Expected 4 tokens, got %d", len(tokens))
}
account = tokens[2]
if account != acc2.Name {
t.Fatalf("Expected %q for account, got %q", acc2.Name, account)
}
dem := DisconnectEventMsg{}
if err := json.Unmarshal(msg.Data, &dem); err != nil {
t.Fatalf("Error unmarshalling disconnect event message: %v", err)
}
if dem.Type != DisconnectEventMsgType {
t.Fatalf("Incorrect schema in connect event: %s", cem.Type)
}
if dem.Time.IsZero() {
t.Fatalf("Event time is not set")
}
if len(dem.ID) != 22 {
t.Fatalf("Event ID is incorrectly set to len %d", len(cem.ID))
}
if dem.Server.ID != s.ID() {
t.Fatalf("Expected server to be %q, got %q", s.ID(), dem.Server.ID)
}
if dem.Server.Seq == 0 {
t.Fatalf("Expected sequence to be non-zero")
}
if dem.Server.Seq <= cem.Server.Seq {
t.Fatalf("Expected sequence to be increasing")
}
if cem.Client.Name != "TEST EVENTS" {
t.Fatalf("Expected client name to be %q, got %q", "TEST EVENTS", dem.Client.Name)
}
if dem.Client.Lang != "go" {
t.Fatalf("Expected client lang to be \"go\", got %q", dem.Client.Lang)
}
if dem.Sent.Msgs != 10 {
t.Fatalf("Expected 10 msgs sent, got %d", dem.Sent.Msgs)
}
if dem.Sent.Bytes != 110 {
t.Fatalf("Expected 110 bytes sent, got %d", dem.Sent.Bytes)
}
if dem.Received.Msgs != 20 {
t.Fatalf("Expected 20 msgs received, got %d", dem.Sent.Msgs)
}
if dem.Received.Bytes != 220 {
t.Fatalf("Expected 220 bytes sent, got %d", dem.Sent.Bytes)
}
}
func runTrustedLeafServer(t *testing.T) (*Server, *Options) {
t.Helper()
opts := DefaultOptions()
kp, _ := nkeys.FromSeed(oSeed)
pub, _ := kp.PublicKey()
opts.TrustedKeys = []string{pub}
opts.AccountResolver = &MemAccResolver{}
opts.LeafNode.Port = -1
s := RunServer(opts)
return s, opts
}
func genCredsFile(t *testing.T, jwt string, seed []byte) string {
creds := `
-----BEGIN NATS USER JWT-----
%s
------END NATS USER JWT------
************************* IMPORTANT *************************
NKEY Seed printed below can be used to sign and prove identity.
NKEYs are sensitive and should be treated as secrets.
-----BEGIN USER NKEY SEED-----
%s
------END USER NKEY SEED------
*************************************************************
`
return createConfFile(t, []byte(strings.Replace(fmt.Sprintf(creds, jwt, seed), "\t\t", "", -1)))
}
func runSolicitWithCredentials(t *testing.T, opts *Options, creds string) (*Server, *Options, string) {
content := `
port: -1
leafnodes {
remotes = [
{
url: nats-leaf://127.0.0.1:%d
credentials: '%s'
}
]
}
`
config := fmt.Sprintf(content, opts.LeafNode.Port, creds)
conf := createConfFile(t, []byte(config))
s, opts := RunServerWithConfig(conf)
return s, opts, conf
}
// Helper function to check that a leaf node has connected to our server.
func checkLeafNodeConnected(t testing.TB, s *Server) {
t.Helper()
checkLeafNodeConnectedCount(t, s, 1)
}
// Helper function to check that a leaf node has connected to n server.
func checkLeafNodeConnectedCount(t testing.TB, s *Server, lnCons int) {
t.Helper()
checkFor(t, 5*time.Second, 15*time.Millisecond, func() error {
if nln := s.NumLeafNodes(); nln != lnCons {
return fmt.Errorf("Expected %d connected leafnode(s) for server %v, got %d",
lnCons, s, nln)
}
return nil
})
}
func TestSystemAccountingWithLeafNodes(t *testing.T) {
s, opts := runTrustedLeafServer(t)
defer s.Shutdown()
acc, akp := createAccount(s)
s.setSystemAccount(acc)
url := fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port)
ncs, err := nats.Connect(url, createUserCreds(t, s, akp))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer ncs.Close()
acc2, akp2 := createAccount(s)
// Be explicit to only receive the event for acc2 account.
sub, _ := ncs.SubscribeSync(fmt.Sprintf("$SYS.ACCOUNT.%s.DISCONNECT", acc2.Name))
defer sub.Unsubscribe()
ncs.Flush()
kp, _ := nkeys.CreateUser()
pub, _ := kp.PublicKey()
nuc := jwt.NewUserClaims(pub)
ujwt, err := nuc.Encode(akp2)
if err != nil {
t.Fatalf("Error generating user JWT: %v", err)
}
seed, _ := kp.Seed()
mycreds := genCredsFile(t, ujwt, seed)
// Create a server that solicits a leafnode connection.
sl, slopts, _ := runSolicitWithCredentials(t, opts, mycreds)
defer sl.Shutdown()
checkLeafNodeConnected(t, s)
// Compute the expected number of subs on "sl" based on number
// of existing subs before creating the sub on "s".
expected := int(sl.NumSubscriptions() + 1)
nc, err := nats.Connect(url, createUserCreds(t, s, akp2), nats.Name("TEST LEAFNODE EVENTS"))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer nc.Close()
fooSub := natsSubSync(t, nc, "foo")
natsFlush(t, nc)
checkExpectedSubs(t, expected, sl)
surl := fmt.Sprintf("nats://%s:%d", slopts.Host, slopts.Port)
nc2, err := nats.Connect(surl, nats.Name("TEST LEAFNODE EVENTS"))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer nc2.Close()
// Compute the expected number of subs on "s" based on number
// of existing subs before creating the sub on "sl".
expected = int(s.NumSubscriptions() + 1)
m := []byte("HELLO WORLD")
// Now generate some traffic
starSub := natsSubSync(t, nc2, "*")
for i := 0; i < 10; i++ {
nc2.Publish("foo", m)
nc2.Publish("bar", m)
}
natsFlush(t, nc2)
checkExpectedSubs(t, expected, s)
// Now send some from the cluster side too.
for i := 0; i < 10; i++ {
nc.Publish("foo", m)
nc.Publish("bar", m)
}
nc.Flush()
// Make sure all messages are received
for i := 0; i < 20; i++ {
if _, err := fooSub.NextMsg(time.Second); err != nil {
t.Fatalf("Did not get message: %v", err)
}
}
for i := 0; i < 40; i++ {
if _, err := starSub.NextMsg(time.Second); err != nil {
t.Fatalf("Did not get message: %v", err)
}
}
// Now shutdown the leafnode server since this is where the event tracking should
// happen. Right now we do not track local clients to the leafnode server that
// solicited to the cluster, but we should track usage once the leafnode connection stops.
sl.Shutdown()
// Make sure we get disconnect event and that tracking is correct.
msg, err := sub.NextMsg(time.Second)
if err != nil {
t.Fatalf("Error receiving msg: %v", err)
}
dem := DisconnectEventMsg{}
if err := json.Unmarshal(msg.Data, &dem); err != nil {
t.Fatalf("Error unmarshalling disconnect event message: %v", err)
}
if dem.Sent.Msgs != 10 {
t.Fatalf("Expected 10 msgs sent, got %d", dem.Sent.Msgs)
}
if dem.Sent.Bytes != 110 {
t.Fatalf("Expected 110 bytes sent, got %d", dem.Sent.Bytes)
}
if dem.Received.Msgs != 20 {
t.Fatalf("Expected 20 msgs received, got %d", dem.Received.Msgs)
}
if dem.Received.Bytes != 220 {
t.Fatalf("Expected 220 bytes sent, got %d", dem.Received.Bytes)
}
}
func TestSystemAccountDisconnectBadLogin(t *testing.T) {
s, opts := runTrustedServer(t)
defer s.Shutdown()
acc, akp := createAccount(s)
s.setSystemAccount(acc)
url := fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port)
ncs, err := nats.Connect(url, createUserCreds(t, s, akp))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer ncs.Close()
// We should never hear $G account events for bad logins.
sub, _ := ncs.SubscribeSync("$SYS.ACCOUNT.$G.*")
defer sub.Unsubscribe()
// Listen for auth error events though.
asub, _ := ncs.SubscribeSync("$SYS.SERVER.*.CLIENT.AUTH.ERR")
defer asub.Unsubscribe()
ncs.Flush()
nats.Connect(url, nats.Name("TEST BAD LOGIN"))
// Should not hear these.
if _, err := sub.NextMsg(100 * time.Millisecond); err == nil {
t.Fatalf("Received a disconnect message from bad login, expected none")
}
m, err := asub.NextMsg(100 * time.Millisecond)
if err != nil {
t.Fatalf("Should have heard an auth error event")
}
dem := DisconnectEventMsg{}
if err := json.Unmarshal(m.Data, &dem); err != nil {
t.Fatalf("Error unmarshalling disconnect event message: %v", err)
}
if dem.Reason != "Authentication Failure" {
t.Fatalf("Expected auth error, got %q", dem.Reason)
}
}
func TestSysSubscribeRace(t *testing.T) {
s, opts := runTrustedServer(t)
defer s.Shutdown()
acc, akp := createAccount(s)
s.setSystemAccount(acc)
url := fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port)
nc, err := nats.Connect(url, createUserCreds(t, s, akp))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer nc.Close()
done := make(chan struct{})
wg := sync.WaitGroup{}
wg.Add(1)
go func() {
defer wg.Done()
for {
nc.Publish("foo", []byte("hello"))
select {
case <-done:
return
default:
}
}
}()
time.Sleep(10 * time.Millisecond)
received := make(chan struct{})
// Create message callback handler.
cb := func(sub *subscription, producer *client, _ *Account, subject, reply string, msg []byte) {
select {
case received <- struct{}{}:
default:
}
}
// Now create an internal subscription
sub, err := s.sysSubscribe("foo", cb)
if sub == nil || err != nil {
t.Fatalf("Expected to subscribe, got %v", err)
}
select {
case <-received:
close(done)
case <-time.After(time.Second):
t.Fatalf("Did not receive the message")
}
wg.Wait()
}
func TestSystemAccountInternalSubscriptions(t *testing.T) {
s, opts := runTrustedServer(t)
defer s.Shutdown()
sub, err := s.sysSubscribe("foo", nil)
if sub != nil || err != ErrNoSysAccount {
t.Fatalf("Expected to get proper error, got %v", err)
}
acc, akp := createAccount(s)
s.setSystemAccount(acc)
url := fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port)
nc, err := nats.Connect(url, createUserCreds(t, s, akp))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer nc.Close()
sub, err = s.sysSubscribe("foo", nil)
if sub != nil || err == nil {
t.Fatalf("Expected to get error for no handler, got %v", err)
}
received := make(chan *nats.Msg)
// Create message callback handler.
cb := func(sub *subscription, _ *client, _ *Account, subject, reply string, msg []byte) {
copy := append([]byte(nil), msg...)
received <- &nats.Msg{Subject: subject, Reply: reply, Data: copy}
}
// Now create an internal subscription
sub, err = s.sysSubscribe("foo", cb)
if sub == nil || err != nil {
t.Fatalf("Expected to subscribe, got %v", err)
}
// Now send out a message from our normal client.
nc.Publish("foo", []byte("HELLO WORLD"))
var msg *nats.Msg
select {
case msg = <-received:
if msg.Subject != "foo" {
t.Fatalf("Expected \"foo\" as subject, got %q", msg.Subject)
}
if msg.Reply != "" {
t.Fatalf("Expected no reply, got %q", msg.Reply)
}
if !bytes.Equal(msg.Data, []byte("HELLO WORLD")) {
t.Fatalf("Got the wrong msg payload: %q", msg.Data)
}
break
case <-time.After(time.Second):
t.Fatalf("Did not receive the message")
}
s.sysUnsubscribe(sub)
// Now send out a message from our normal client.
// We should not see this one.
nc.Publish("foo", []byte("You There?"))
select {
case <-received:
t.Fatalf("Received a message when we should not have")
case <-time.After(100 * time.Millisecond):
break
}
// Now make sure we do not hear ourselves. We optimize this for internally
// generated messages.
s.mu.Lock()
s.sendInternalMsg("foo", "", nil, msg.Data)
s.mu.Unlock()
select {
case <-received:
t.Fatalf("Received a message when we should not have")
case <-time.After(100 * time.Millisecond):
break
}
}
func TestSystemAccountConnectionUpdatesStopAfterNoLocal(t *testing.T) {
sa, _, sb, optsB, _ := runTrustedCluster(t)
defer sa.Shutdown()
defer sb.Shutdown()
// Normal Account
okp, _ := nkeys.FromSeed(oSeed)
akp, _ := nkeys.CreateAccount()
pub, _ := akp.PublicKey()
nac := jwt.NewAccountClaims(pub)
nac.Limits.Conn = 4 // Limit to 4 connections.
jwt, _ := nac.Encode(okp)
addAccountToMemResolver(sa, pub, jwt)
// Listen for updates to the new account connection activity.
received := make(chan *nats.Msg, 10)
cb := func(sub *subscription, _ *client, _ *Account, subject, reply string, msg []byte) {
copy := append([]byte(nil), msg...)
received <- &nats.Msg{Subject: subject, Reply: reply, Data: copy}
}
subj := fmt.Sprintf(accConnsEventSubjNew, pub)
sub, err := sa.sysSubscribe(subj, cb)
if sub == nil || err != nil {
t.Fatalf("Expected to subscribe, got %v", err)
}
defer sa.sysUnsubscribe(sub)
// Create a few users on the new account.
clients := []*nats.Conn{}
url := fmt.Sprintf("nats://%s:%d", optsB.Host, optsB.Port)
for i := 0; i < 4; i++ {
nc, err := nats.Connect(url, createUserCreds(t, sb, akp))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer nc.Close()
clients = append(clients, nc)
}
// Wait for all 4 notifications.
checkFor(t, time.Second, 50*time.Millisecond, func() error {
if len(received) == 4 {
return nil
}
return fmt.Errorf("Not enough messages, %d vs 4", len(received))
})
// Now lookup the account doing the events on sb.
acc, _ := sb.LookupAccount(pub)
// Make sure we have the timer running.
acc.mu.RLock()
ctmr := acc.ctmr
acc.mu.RUnlock()
if ctmr == nil {
t.Fatalf("Expected event timer for acc conns to be running")
}
// Now close all of the connections.
for _, nc := range clients {
nc.Close()
}
// Wait for the 4 new notifications, 8 total (4 for connect, 4 for disconnect)
checkFor(t, time.Second, 50*time.Millisecond, func() error {
if len(received) == 8 {
return nil
}
return fmt.Errorf("Not enough messages, %d vs 4", len(received))
})
// Drain the messages.
for i := 0; i < 7; i++ {
<-received
}
// Check last one.
msg := <-received
m := AccountNumConns{}
if err := json.Unmarshal(msg.Data, &m); err != nil {
t.Fatalf("Error unmarshalling account connections request message: %v", err)
}
if m.Conns != 0 {
t.Fatalf("Expected Conns to be 0, got %d", m.Conns)
}
// Should not receive any more messages..
select {
case <-received:
t.Fatalf("Did not expect a message here")
case <-time.After(50 * time.Millisecond):
break
}
// Make sure we have the timer is NOT running.
acc.mu.RLock()
ctmr = acc.ctmr
acc.mu.RUnlock()
if ctmr != nil {
t.Fatalf("Expected event timer for acc conns to NOT be running after reaching zero local clients")
}
}
func TestSystemAccountConnectionLimits(t *testing.T) {
sa, optsA, sb, optsB, _ := runTrustedCluster(t)
defer sa.Shutdown()
defer sb.Shutdown()
// We want to test that we are limited to a certain number of active connections
// across multiple servers.
// Let's create a user account.
okp, _ := nkeys.FromSeed(oSeed)
akp, _ := nkeys.CreateAccount()
pub, _ := akp.PublicKey()
nac := jwt.NewAccountClaims(pub)
nac.Limits.Conn = 4 // Limit to 4 connections.
jwt, _ := nac.Encode(okp)
addAccountToMemResolver(sa, pub, jwt)
urlA := fmt.Sprintf("nats://%s:%d", optsA.Host, optsA.Port)
urlB := fmt.Sprintf("nats://%s:%d", optsB.Host, optsB.Port)
// Create a user on each server. Break on first failure.
for {
nca1, err := nats.Connect(urlA, createUserCreds(t, sa, akp))
if err != nil {
break
}
defer nca1.Close()
ncb1, err := nats.Connect(urlB, createUserCreds(t, sb, akp))
if err != nil {
break
}
defer ncb1.Close()
}
checkFor(t, 5*time.Second, 50*time.Millisecond, func() error {
total := sa.NumClients() + sb.NumClients()
if total > int(nac.Limits.Conn) {
return fmt.Errorf("Expected only %d connections, was allowed to connect %d", nac.Limits.Conn, total)
}
return nil
})
}
func TestBadAccountUpdate(t *testing.T) {
sa, _ := runTrustedServer(t)
defer sa.Shutdown()
akp1, _ := nkeys.CreateAccount()
pub, _ := akp1.PublicKey()
nac := jwt.NewAccountClaims(pub)
ajwt1, err := nac.Encode(oKp)
require_NoError(t, err)
addAccountToMemResolver(sa, pub, ajwt1)
akp2, _ := nkeys.CreateAccount()
pub2, _ := akp2.PublicKey()
nac.Subject = pub2 // maliciously use a different subject but pretend to remain pub
ajwt2, err := nac.Encode(oKp)
require_NoError(t, err)
acc, err := sa.fetchAccount(pub)
require_NoError(t, err)
if err := sa.updateAccountWithClaimJWT(acc, ajwt2); err != ErrAccountValidation {
t.Fatalf("expected %v but got %v", ErrAccountValidation, err)
}
}
// Make sure connection limits apply to the system account itself.
func TestSystemAccountSystemConnectionLimitsHonored(t *testing.T) {
sa, optsA, sb, optsB, sakp := runTrustedCluster(t)
defer sa.Shutdown()
defer sb.Shutdown()
okp, _ := nkeys.FromSeed(oSeed)
// Update system account to have 10 connections
pub, _ := sakp.PublicKey()
nac := jwt.NewAccountClaims(pub)
nac.Limits.Conn = 10
ajwt, _ := nac.Encode(okp)
addAccountToMemResolver(sa, pub, ajwt)
addAccountToMemResolver(sb, pub, ajwt)
// Update the accounts on each server with new claims to force update.
sysAccA := sa.SystemAccount()
sa.updateAccountWithClaimJWT(sysAccA, ajwt)
sysAccB := sb.SystemAccount()
sb.updateAccountWithClaimJWT(sysAccB, ajwt)
// Check system here first, with no external it should be zero.
sacc := sa.SystemAccount()
if nlc := sacc.NumLocalConnections(); nlc != 0 {
t.Fatalf("Expected no local connections, got %d", nlc)
}
urlA := fmt.Sprintf("nats://%s:%d", optsA.Host, optsA.Port)
urlB := fmt.Sprintf("nats://%s:%d", optsB.Host, optsB.Port)
// Create a user on each server. Break on first failure.
tc := 0
for {
nca1, err := nats.Connect(urlA, createUserCreds(t, sa, sakp))
if err != nil {
break
}
defer nca1.Close()
tc++
ncb1, err := nats.Connect(urlB, createUserCreds(t, sb, sakp))
if err != nil {
break
}
defer ncb1.Close()
tc++
// The account's connection count is exchanged between servers
// so that the local count on each server reflects the total count.
// Pause a bit to give a chance to each server to process the update.
time.Sleep(15 * time.Millisecond)
}
if tc != 10 {
t.Fatalf("Expected to get 10 external connections, got %d", tc)
}
checkFor(t, 1*time.Second, 50*time.Millisecond, func() error {
total := sa.NumClients() + sb.NumClients()
if total > int(nac.Limits.Conn) {
return fmt.Errorf("Expected only %d connections, was allowed to connect %d", nac.Limits.Conn, total)
}
return nil
})
}
// Test that the remote accounting works when a server is started some time later.
func TestSystemAccountConnectionLimitsServersStaggered(t *testing.T) {
sa, optsA, sb, optsB, _ := runTrustedCluster(t)
defer sa.Shutdown()
sb.Shutdown()
// Let's create a user account.
okp, _ := nkeys.FromSeed(oSeed)
akp, _ := nkeys.CreateAccount()
pub, _ := akp.PublicKey()
nac := jwt.NewAccountClaims(pub)
nac.Limits.Conn = 4 // Limit to 4 connections.
jwt, _ := nac.Encode(okp)
addAccountToMemResolver(sa, pub, jwt)