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monitor_test.go
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monitor_test.go
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// Copyright 2017-2019 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 (
"crypto/tls"
"crypto/x509"
"encoding/json"
"fmt"
"io/ioutil"
"math/rand"
"net/http"
"reflect"
"runtime"
"strings"
"sync/atomic"
"testing"
"time"
"github.com/hashicorp/raft"
natsd "github.com/nats-io/nats-server/v2/server"
natsdTest "github.com/nats-io/nats-server/v2/test"
"github.com/nats-io/nats-streaming-server/stores"
"github.com/nats-io/nats.go"
"github.com/nats-io/stan.go"
"github.com/nats-io/stan.go/pb"
)
const (
monitorHost = "127.0.0.1"
monitorPort = 8222
expectedJSON = "application/json"
expectedText = "text/html; charset=utf-8"
expectedCb = "application/javascript"
)
var defaultMonitorOptions = natsd.Options{
Host: "127.0.0.1",
Port: 4222,
HTTPHost: monitorHost,
HTTPPort: monitorPort,
Cluster: natsd.ClusterOpts{
Host: "127.0.0.1",
Port: 6222,
},
NoLog: true,
NoSigs: true,
}
func resetPreviousHTTPConnections() {
http.DefaultTransport = &http.Transport{}
}
func runMonitorServer(t *testing.T, sOpts *Options) *StanServer {
nOpts := defaultMonitorOptions
return runServerWithOpts(t, sOpts, &nOpts)
}
func getBodyEx(t *testing.T, client *http.Client, scheme, endpoint string, expectedStatus int, expectedContentType string) (*http.Response, []byte) {
url := fmt.Sprintf("%s://%s:%d%s", scheme, monitorHost, monitorPort, endpoint)
resp, err := client.Get(url)
if err != nil {
stackFatalf(t, "Expected no error: Got %v\n", err)
}
if resp.StatusCode != expectedStatus {
stackFatalf(t, "Expected a %d response, got %d\n", expectedStatus, resp.StatusCode)
}
ct := resp.Header.Get("Content-Type")
if ct != expectedContentType {
stackFatalf(t, "Expected %s content-type, got %s\n", expectedContentType, ct)
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
resp.Body.Close()
stackFatalf(t, "Got an error reading the body: %v\n", err)
}
return resp, body
}
func getBody(t *testing.T, endpoint, expectedContentType string) (*http.Response, []byte) {
return getBodyEx(t, http.DefaultClient, "http", endpoint, http.StatusOK, expectedContentType)
}
func monitorExpectStatusEx(t *testing.T, client *http.Client, scheme, endpoint string, expectedStatus int) {
url := fmt.Sprintf("%s://%s:%d%s", scheme, monitorHost, monitorPort, endpoint)
resp, err := client.Get(url)
if err != nil {
stackFatalf(t, "Expected no error: Got %v\n", err)
}
defer resp.Body.Close()
if resp.StatusCode != expectedStatus {
stackFatalf(t, "Expected a %d response, got %d\n", expectedStatus, resp.StatusCode)
}
}
func monitorExpectStatus(t *testing.T, endpoint string, expectedStatus int) {
monitorExpectStatusEx(t, http.DefaultClient, "http", endpoint, expectedStatus)
}
func TestMonitorUseEmbeddedNATSServer(t *testing.T) {
resetPreviousHTTPConnections()
s := runMonitorServer(t, GetDefaultOptions())
defer s.Shutdown()
resp, _ := getBody(t, RootPath, expectedText)
defer resp.Body.Close()
}
func TestMonitorStartOwnHTTPServer(t *testing.T) {
resetPreviousHTTPConnections()
ns := natsdTest.RunDefaultServer()
defer ns.Shutdown()
nOpts := natsdTest.DefaultTestOptions
nOpts.HTTPHost = monitorHost
nOpts.HTTPPort = monitorPort
sOpts := GetDefaultOptions()
sOpts.NATSServerURL = "nats://127.0.0.1:4222"
s := runServerWithOpts(t, sOpts, &nOpts)
defer s.Shutdown()
resp, _ := getBody(t, RootPath, expectedText)
resp.Body.Close()
}
func TestMonitorStartOwnHTTPSServer(t *testing.T) {
resetPreviousHTTPConnections()
ns := natsdTest.RunDefaultServer()
defer ns.Shutdown()
nOpts := natsdTest.DefaultTestOptions
nOpts.HTTPHost = monitorHost
nOpts.HTTPSPort = monitorPort
nOpts.TLSConfig = &tls.Config{ServerName: "localhost"}
cert, err := tls.LoadX509KeyPair("../test/certs/server-cert.pem", "../test/certs/server-key.pem")
if err != nil {
t.Fatalf("Got error reading certificates: %s", err)
}
nOpts.TLSConfig.Certificates = []tls.Certificate{cert}
sOpts := GetDefaultOptions()
sOpts.NATSServerURL = "nats://127.0.0.1:4222"
s := runServerWithOpts(t, sOpts, &nOpts)
defer s.Shutdown()
tlsConfig := &tls.Config{}
caCert, err := ioutil.ReadFile("../test/certs/ca.pem")
if err != nil {
t.Fatalf("Got error reading RootCA file: %s", err)
}
caCertPool := x509.NewCertPool()
caCertPool.AppendCertsFromPEM(caCert)
tlsConfig.RootCAs = caCertPool
transport := &http.Transport{TLSClientConfig: tlsConfig}
httpClient := &http.Client{Transport: transport}
r, _ := getBodyEx(t, httpClient, "https", RootPath, http.StatusOK, expectedText)
r.Body.Close()
}
func TestMonitorServerz(t *testing.T) {
resetPreviousHTTPConnections()
s := runMonitorServer(t, GetDefaultOptions())
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
sub, err := sc.Subscribe("foo", func(_ *stan.Msg) {})
if err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
defer sub.Unsubscribe()
totalMsgs := 10
msg := []byte("hello")
for i := 0; i < totalMsgs; i++ {
if err := sc.Publish("foo", msg); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
}
cs := channelsGet(t, s.channels, "foo").store
_, totalBytes := msgStoreState(t, cs.Msgs)
resp, body := getBody(t, ServerPath, expectedJSON)
defer resp.Body.Close()
sz := Serverz{}
if err := json.Unmarshal(body, &sz); err != nil {
t.Fatalf("Got an error unmarshalling the body: %v", err)
}
if sz.ClusterID != s.ClusterID() {
t.Fatalf("Expected ClusterID to be %v, got %v", s.ClusterID(), sz.ClusterID)
}
if sz.ServerID != s.serverID {
t.Fatalf("Expected ServerID to be %v, got %v", s.serverID, sz.ServerID)
}
if sz.State != Standalone.String() {
t.Fatalf("Expected State to be %v, got %v", Standalone.String(), sz.State)
}
if sz.Now.IsZero() {
t.Fatalf("Expected Now to be set, was not")
}
if sz.Start.IsZero() {
t.Fatalf("Expected Start to be set, was not")
}
if sz.Uptime == "" {
t.Fatalf("Expected Uptime to be set, was not")
}
if sz.Version != VERSION {
t.Fatalf("Expected version to be %v, got %v", VERSION, sz.Version)
}
if sz.GoVersion != runtime.Version() {
t.Fatalf("Expected GoVersion to be %v, got %v", runtime.Version(), sz.Version)
}
if sz.Clients != 1 {
t.Fatalf("Expected 1 client, got %v", sz.Clients)
}
if sz.Channels != 1 {
t.Fatalf("Expected 1 channel, got %v", sz.Channels)
}
if sz.Subscriptions != 1 {
t.Fatalf("Expected 1 subscription, got %v", sz.Subscriptions)
}
if sz.TotalMsgs != totalMsgs {
t.Fatalf("Expected %d messages, got %v", totalMsgs, sz.TotalMsgs)
}
if sz.TotalBytes != totalBytes {
t.Fatalf("Expected %v bytes, got %v", totalBytes, sz.TotalBytes)
}
if runtime.GOOS == "linux" {
if sz.OpenFDs == 0 {
t.Fatalf("Expected more than 0 open files, got %v", sz.OpenFDs)
}
if sz.MaxFDs == 0 {
t.Fatalf("Expected open files limit to be bigger than 0, got %v", sz.MaxFDs)
}
} else {
if sz.OpenFDs != 0 {
t.Fatalf("Expected 0 open files, got %v", sz.OpenFDs)
}
if sz.MaxFDs != 0 {
t.Fatalf("Expected open files limit to 0, got %v", sz.MaxFDs)
}
// Not only check that values are expected to be 0, but that we don't even
// find them in the json content (omitempty)
if strings.Contains(string(body), "max_fds") || strings.Contains(string(body), "open_fds") {
t.Fatal("open_fds and max_fds should be omitempty")
}
}
resp.Body.Close()
if err := sub.Unsubscribe(); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
waitForNumSubs(t, s, clientName, 0)
resp, body = getBody(t, ServerPath, expectedJSON)
defer resp.Body.Close()
sz = Serverz{}
if err := json.Unmarshal(body, &sz); err != nil {
t.Fatalf("Got an error unmarshalling the body: %v", err)
}
if sz.Clients != 1 {
t.Fatalf("Expected 1 client, got %v", sz.Clients)
}
if sz.Channels != 1 {
t.Fatalf("Expected 1 channel, got %v", sz.Channels)
}
if sz.Subscriptions != 0 {
t.Fatalf("Expected 0 subscription, got %v", sz.Subscriptions)
}
if sz.TotalMsgs != totalMsgs {
t.Fatalf("Expected %d messages, got %v", totalMsgs, sz.TotalMsgs)
}
if sz.TotalBytes != totalBytes {
t.Fatalf("Expected %v bytes, got %v", totalBytes, sz.TotalBytes)
}
resp.Body.Close()
sc.Close()
waitForNumClients(t, s, 0)
resp, body = getBody(t, ServerPath, expectedJSON)
defer resp.Body.Close()
sz = Serverz{}
if err := json.Unmarshal(body, &sz); err != nil {
t.Fatalf("Got an error unmarshalling the body: %v", err)
}
if sz.Clients != 0 {
t.Fatalf("Expected 0 client, got %v", sz.Clients)
}
if sz.Channels != 1 {
t.Fatalf("Expected 1 channel, got %v", sz.Channels)
}
if sz.Subscriptions != 0 {
t.Fatalf("Expected 0 subscription, got %v", sz.Subscriptions)
}
if sz.TotalMsgs != totalMsgs {
t.Fatalf("Expected %d messages, got %v", totalMsgs, sz.TotalMsgs)
}
if sz.TotalBytes != totalBytes {
t.Fatalf("Expected %v bytes, got %v", totalBytes, sz.TotalBytes)
}
resp.Body.Close()
// Test JSONP
resp, _ = getBody(t, ServerPath+"?callback=callback", expectedCb)
resp.Body.Close()
// Restart server, for memory based server, things should have been reset
s.Shutdown()
resetPreviousHTTPConnections()
s = runMonitorServer(t, GetDefaultOptions())
defer s.Shutdown()
resp, body = getBody(t, ServerPath, expectedJSON)
defer resp.Body.Close()
sz = Serverz{}
if err := json.Unmarshal(body, &sz); err != nil {
t.Fatalf("Got an error unmarshalling the body: %v", err)
}
if sz.ClusterID != s.ClusterID() {
t.Fatalf("Expected ClusterID to be %v, got %v", s.ClusterID(), sz.ClusterID)
}
if sz.ServerID != s.serverID {
t.Fatalf("Expected ServerID to be %v, got %v", s.serverID, sz.ServerID)
}
if sz.State != Standalone.String() {
t.Fatalf("Expected State to be %v, got %v", Standalone.String(), sz.State)
}
if sz.Now.IsZero() {
t.Fatalf("Expected Now to be set, was not")
}
if sz.Start.IsZero() {
t.Fatalf("Expected Start to be set, was not")
}
if sz.Uptime == "" {
t.Fatalf("Expected Uptime to be set, was not")
}
if sz.Version != VERSION {
t.Fatalf("Expected version to be %v, got %v", VERSION, sz.Version)
}
if sz.GoVersion != runtime.Version() {
t.Fatalf("Expected GoVersion to be %v, got %v", runtime.Version(), sz.Version)
}
if sz.Clients != 0 {
t.Fatalf("Expected 0 client, got %v", sz.Clients)
}
if sz.Channels != 0 {
t.Fatalf("Expected 0 channel, got %v", sz.Channels)
}
if sz.Subscriptions != 0 {
t.Fatalf("Expected 0 subscription, got %v", sz.Subscriptions)
}
if sz.TotalMsgs != 0 {
t.Fatalf("Expected 0 message, got %v", sz.TotalMsgs)
}
if sz.TotalBytes > 0 {
t.Fatalf("Expected 0 bytes, got %v", sz.TotalBytes)
}
// Produce store failure
c := channelsLookupOrCreate(t, s, "foo")
c.store.Msgs = &msgStoreFailMsgState{MsgStore: c.store.Msgs}
monitorExpectStatus(t, ServerPath, http.StatusInternalServerError)
}
func TestMonitorIsFTActiveFTServer(t *testing.T) {
for _, test := range []struct {
name string
checkActive bool
expectedStatus int
}{
{"active", true, http.StatusOK},
{"standby", false, http.StatusNoContent},
} {
t.Run(test.name, func(t *testing.T) {
resetPreviousHTTPConnections()
cleanupFTDatastore(t)
defer cleanupFTDatastore(t)
nopts := defaultMonitorOptions
var aNOpts *natsd.Options
var sNOpts *natsd.Options
if test.checkActive {
aNOpts = &nopts
} else {
sNOpts = &nopts
}
opts := getTestFTDefaultOptions()
active := runServerWithOpts(t, opts, aNOpts)
defer active.Shutdown()
getFTActiveServer(t, active)
opts = getTestFTDefaultOptions()
opts.NATSServerURL = "nats://127.0.0.1:4222"
standby := runServerWithOpts(t, opts, sNOpts)
defer standby.Shutdown()
resp, _ := getBodyEx(t, http.DefaultClient, "http", IsFTActivePath, test.expectedStatus, "")
defer resp.Body.Close()
})
}
}
func TestMonitorUptime(t *testing.T) {
expected := []string{"1y2d3h4m5s", "1d2h3m4s", "1h2m3s", "1m2s", "1s"}
durations := []time.Duration{
365*24*time.Hour + 2*24*time.Hour + 3*time.Hour + 4*time.Minute + 5*time.Second,
24*time.Hour + 2*time.Hour + 3*time.Minute + 4*time.Second,
time.Hour + 2*time.Minute + 3*time.Second,
time.Minute + 2*time.Second,
time.Second,
}
for i, d := range durations {
got := myUptime(d)
if got != expected[i] {
t.Fatalf("Expected %v, got %v", expected[i], got)
}
}
}
func TestMonitorServerzAfterRestart(t *testing.T) {
resetPreviousHTTPConnections()
cleanupDatastore(t)
defer cleanupDatastore(t)
opts := getTestDefaultOptsForPersistentStore()
s := runMonitorServer(t, opts)
defer s.Shutdown()
nc, err := nats.Connect(nats.DefaultURL, nats.ReconnectWait(100*time.Millisecond))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer nc.Close()
sc, err := stan.Connect(clusterName, clientName, stan.NatsConn(nc))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer sc.Close()
sub, err := sc.Subscribe("foo", func(_ *stan.Msg) {})
if err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
defer sub.Unsubscribe()
totalMsgs := 10
msg := []byte("hello")
for i := 0; i < totalMsgs; i++ {
if err := sc.Publish("foo", msg); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
}
cs := channelsGet(t, s.channels, "foo").store
_, totalBytes := msgStoreState(t, cs.Msgs)
for i := 0; i < 2; i++ {
resp, body := getBody(t, ServerPath, expectedJSON)
defer resp.Body.Close()
sz := Serverz{}
if err := json.Unmarshal(body, &sz); err != nil {
t.Fatalf("Got an error unmarshalling the body: %v", err)
}
if sz.ClusterID != s.ClusterID() {
t.Fatalf("Expected ClusterID to be %v, got %v", s.ClusterID(), sz.ClusterID)
}
if sz.ServerID != s.serverID {
t.Fatalf("Expected ServerID to be %v, got %v", s.serverID, sz.ServerID)
}
if sz.Now.IsZero() {
t.Fatalf("Expected Now to be set, was not")
}
if sz.Start.IsZero() {
t.Fatalf("Expected Start to be set, was not")
}
if sz.Uptime == "" {
t.Fatalf("Expected Uptime to be set, was not")
}
if sz.Version != VERSION {
t.Fatalf("Expected version to be %v, got %v", VERSION, sz.Version)
}
if sz.GoVersion != runtime.Version() {
t.Fatalf("Expected GoVersion to be %v, got %v", runtime.Version(), sz.Version)
}
if sz.Clients != 1 {
t.Fatalf("Expected 1 client, got %v", sz.Clients)
}
if sz.Channels != 1 {
t.Fatalf("Expected 1 channel, got %v", sz.Channels)
}
if sz.Subscriptions != 1 {
t.Fatalf("Expected 1 subscription, got %v", sz.Subscriptions)
}
if sz.TotalMsgs != totalMsgs {
t.Fatalf("Expected %d messages, got %v", totalMsgs, sz.TotalMsgs)
}
if sz.TotalBytes != totalBytes {
t.Fatalf("Expected %v bytes, got %v", totalBytes, sz.TotalBytes)
}
resp.Body.Close()
// Restart server
s.Shutdown()
resetPreviousHTTPConnections()
s = runMonitorServer(t, opts)
defer s.Shutdown()
}
sc.Close()
nc.Close()
s.Shutdown()
}
func TestMonitorStorez(t *testing.T) {
msg := []byte("hello")
total := 1000
testStore := func(s *StanServer, expectedType string) {
defer s.Shutdown()
resetPreviousHTTPConnections()
sc := NewDefaultConnection(t)
defer sc.Close()
expectedTotalMsgs := 0
expectedTotalBytes := uint64(0)
for i := 0; i < 2; i++ {
resp, body := getBody(t, StorePath, expectedJSON)
defer resp.Body.Close()
sz := Storez{}
if err := json.Unmarshal(body, &sz); err != nil {
t.Fatalf("Got an error unmarshalling the body: %v", err)
}
if sz.ClusterID != s.ClusterID() {
t.Fatalf("Expected ClusterID to be %v, got %v", s.ClusterID(), sz.ClusterID)
}
if sz.ServerID != s.serverID {
t.Fatalf("Expected ServerID to be %v, got %v", s.serverID, sz.ServerID)
}
if sz.Now.IsZero() {
t.Fatalf("Expected Now to be set, was not")
}
if sz.Type != expectedType {
t.Fatalf("Expected Type to be %v, got %v", expectedType, sz.Type)
}
if !reflect.DeepEqual(sz.Limits, s.opts.StoreLimits) {
t.Fatalf("Expected Limits to be %v, got %v", s.opts.StoreLimits, sz.Limits)
}
if sz.TotalMsgs != expectedTotalMsgs {
t.Fatalf("Expected TotalMsgs to be %v, got %v", expectedTotalMsgs, sz.TotalMsgs)
}
if sz.TotalBytes != expectedTotalBytes {
t.Fatalf("Expected TotalMsgs to be %v, got %v", expectedTotalBytes, sz.TotalBytes)
}
resp.Body.Close()
if i == 0 {
for j := 0; j < total; j++ {
if err := sc.Publish("foo", msg); err != nil {
t.Fatalf("Unexpected error on publish: %v", err)
}
}
cs := channelsGet(t, s.channels, "foo").store
expectedTotalMsgs, expectedTotalBytes = msgStoreState(t, cs.Msgs)
}
}
// Produce store failure
c := channelsGet(t, s.channels, "foo")
c.store.Msgs = &msgStoreFailMsgState{MsgStore: c.store.Msgs}
monitorExpectStatus(t, StorePath, http.StatusInternalServerError)
}
s := runMonitorServer(t, GetDefaultOptions())
testStore(s, stores.TypeMemory)
cleanupDatastore(t)
defer cleanupDatastore(t)
opts := getTestDefaultOptsForPersistentStore()
s = runMonitorServer(t, opts)
testStore(s, persistentStoreType)
}
func TestMonitorClientsz(t *testing.T) {
resetPreviousHTTPConnections()
s := runMonitorServer(t, GetDefaultOptions())
defer s.Shutdown()
cids := []string{"me1", "me2", "me3", "me4", "me5"}
totalClients := len(cids)
scs := make([]stan.Conn, 0, totalClients)
for _, cid := range cids {
sc, err := stan.Connect(clusterName, cid)
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer sc.Close()
if _, err := sc.Subscribe("bar", func(_ *stan.Msg) {}); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
scs = append(scs, sc)
}
generateExpectedCZ := func(offset, limit, count, total int, cids []string, expectSubs bool) *Clientsz {
clientsz := &Clientsz{
ClusterID: s.info.ClusterID,
ServerID: s.serverID,
Offset: offset,
Limit: limit,
Count: count,
Total: total,
}
clientsz.Clients = make([]*Clientz, 0, len(cids))
for _, cid := range cids {
cli := s.clients.lookup(cid)
cli.RLock()
cz := &Clientz{
ID: cid,
HBInbox: cli.info.HbInbox,
SubsCount: len(cli.subs),
}
if expectSubs {
cz.Subscriptions = getCliSubs(cli.subs)
}
cli.RUnlock()
clientsz.Clients = append(clientsz.Clients, cz)
}
return clientsz
}
paths := []string{"", "?offset=-1", "?offset=1", "?offset=10", "?limit=-1", "?limit=1", "?offset=1&limit=2", "?subs=1"}
expected := []*Clientsz{
generateExpectedCZ(0, defaultMonitorListLimit, totalClients, totalClients, cids, false),
generateExpectedCZ(0, defaultMonitorListLimit, totalClients, totalClients, cids, false),
generateExpectedCZ(1, defaultMonitorListLimit, totalClients-1, totalClients, cids[1:], false),
generateExpectedCZ(10, defaultMonitorListLimit, 0, totalClients, cids[totalClients:], false),
generateExpectedCZ(0, defaultMonitorListLimit, totalClients, totalClients, cids, false),
generateExpectedCZ(0, 1, 1, totalClients, cids[:1], false),
generateExpectedCZ(1, 2, 2, totalClients, cids[1:1+2], false),
generateExpectedCZ(0, defaultMonitorListLimit, totalClients-2, totalClients-2, cids[2:], true), // We have closed the 2 first clients
}
for i := 0; i < len(paths); i++ {
resp, body := getBody(t, ClientsPath+paths[i], expectedJSON)
defer resp.Body.Close()
cz := Clientsz{}
if err := json.Unmarshal(body, &cz); err != nil {
t.Fatalf("Got an error unmarshalling the body: %v", err)
}
resp.Body.Close()
goal := *expected[i]
// We cannot assume Now, so remove it for comparison
cz.Now = time.Time{}
// We have only 1 sub per client, so DeepEqual will be ok.
if !reflect.DeepEqual(cz, goal) {
t.Fatalf("Iter=%v - Path=%q - Expected to get %v, got %v", i, ClientsPath+paths[i], goal, cz)
}
if i == len(paths)-2 {
// Close the 2 first clients
scs[0].Close()
scs[1].Close()
}
}
for _, sc := range scs {
sc.Close()
}
}
func getCliSubs(subs []*subState) map[string][]*Subscriptionz {
if len(subs) == 0 {
return nil
}
subsz := make(map[string][]*Subscriptionz)
for _, sub := range subs {
subz := createSubz(sub)
sarr := subsz[sub.subject]
newSarr := append(sarr, subz)
if &newSarr != &sarr {
subsz[sub.subject] = newSarr
}
}
return subsz
}
func getChannelSubs(subs []*subState) []*Subscriptionz {
if len(subs) == 0 {
return nil
}
subsz := make([]*Subscriptionz, 0, len(subs))
for _, sub := range subs {
subsz = append(subsz, createSubz(sub))
}
return subsz
}
func createSubz(sub *subState) *Subscriptionz {
sub.RLock()
subz := &Subscriptionz{
ClientID: sub.ClientID,
Inbox: sub.Inbox,
AckInbox: sub.AckInbox,
DurableName: sub.DurableName,
QueueName: sub.QGroup,
IsDurable: sub.IsDurable,
MaxInflight: int(sub.MaxInFlight),
AckWait: int(sub.AckWaitInSecs),
LastSent: sub.LastSent,
PendingCount: len(sub.acksPending),
IsStalled: sub.stalled,
}
sub.RUnlock()
return subz
}
func TestMonitorClientz(t *testing.T) {
resetPreviousHTTPConnections()
s := runMonitorServer(t, GetDefaultOptions())
defer s.Shutdown()
cids := []string{"me1", "me2"}
numClients := len(cids)
numSubs := 10
scs := make([]stan.Conn, 0, numClients)
for _, cid := range cids {
sc, err := stan.Connect(clusterName, cid)
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer sc.Close()
for i := 0; i < numSubs; i++ {
if _, err := sc.Subscribe("bar", func(_ *stan.Msg) {}); err != nil {
t.Fatalf("Unexpected error on subscribe: %v", err)
}
}
scs = append(scs, sc)
}
generateExpectedCZ := func(cid string, expectSubs bool) *Clientz {
cli := s.clients.lookup(cid)
if cli == nil {
return nil
}
cli.RLock()
cz := &Clientz{
ID: cid,
HBInbox: cli.info.HbInbox,
SubsCount: len(cli.subs),
}
if expectSubs {
cz.Subscriptions = getCliSubs(cli.subs)
}
cli.RUnlock()
return cz
}
paths := []string{"?client=me1", "?client=me2&subs=1"}
expected := []*Clientz{
generateExpectedCZ("me1", false),
generateExpectedCZ("me2", true),
}
for i := 0; i < len(paths); i++ {
resp, body := getBody(t, ClientsPath+paths[i], expectedJSON)
defer resp.Body.Close()
cz := Clientz{}
if err := json.Unmarshal(body, &cz); err != nil {
t.Fatalf("Got an error unmarshalling the body: %v", err)
}
resp.Body.Close()
goal := *expected[i]
if goal.Subscriptions != nil {
if err := compareCliSubs(goal.Subscriptions, cz.Subscriptions); err != nil {
t.Fatalf("Iter=%v - Path=%q - %v", i, ClientsPath+paths[i], err)
}
// Now nilify the Subscriptions for the DeepEqual call
goal.Subscriptions = nil
cz.Subscriptions = nil
} else if cz.Subscriptions != nil {
t.Fatalf("Iter=%v - Path=%q - Did not expect to get subscriptions, got %v", i, ClientsPath+paths[i], cz.Subscriptions)
}
if !reflect.DeepEqual(cz, goal) {
t.Fatalf("Iter=%v - Path=%q - Expected to get %v, got %v", i, ClientsPath+paths[i], goal, cz)
}
}
// Check one that does not exist, expect 404
monitorExpectStatus(t, ClientsPath+"?client=donotexist", http.StatusNotFound)
for _, sc := range scs {
sc.Close()
}
}
func compareCliSubs(expected, got map[string][]*Subscriptionz) error {
if len(expected) != len(got) {
return fmt.Errorf("expected %d channels, got %v", len(expected), len(got))
}
for cn, sarr := range got {
expectedSarr := expected[cn]
if len(sarr) != len(expectedSarr) {
return fmt.Errorf("channel %v, expected %d subscriptions, got %v", cn, len(expectedSarr), len(sarr))
}
if err := compareChannelSubs(cn, expectedSarr, sarr); err != nil {
return err
}
}
return nil
}
func compareChannelSubs(cn string, expected, got []*Subscriptionz) error {
if len(expected) != len(got) {
return fmt.Errorf("expected %d subscriptions, got %v", len(expected), len(got))
}
ok := false
for _, sub := range got {
for _, expectedSub := range expected {
if reflect.DeepEqual(sub, expectedSub) {
ok = true
break
}
}
if ok {
break
}
}
if !ok {
return fmt.Errorf("channel %v, expected subscriptions %v, got %v", cn, expected, got)
}
return nil
}
func TestMonitorChannelsz(t *testing.T) {
resetPreviousHTTPConnections()
s := runMonitorServer(t, GetDefaultOptions())
defer s.Shutdown()
channels := []string{"bar", "baz", "foo", "foo.bar"}
totalChannels := len(channels)
for _, c := range channels {
channelsLookupOrCreate(t, s, c)
}
generateExpectedCZ := func(offset, limit, count int, channels []string) *Channelsz {
channelsz := &Channelsz{
ClusterID: s.info.ClusterID,
ServerID: s.serverID,
Offset: offset,
Limit: limit,
Count: count,
Total: totalChannels,
}
if channels != nil {
channelsz.Names = make([]string, 0, len(channels))
channelsz.Names = append(channelsz.Names, channels...)
}
return channelsz
}
paths := []string{"", "?offset=-1", "?offset=1", "?offset=10", "?limit=-1", "?limit=1", "?offset=1&limit=2"}
expected := []*Channelsz{
generateExpectedCZ(0, defaultMonitorListLimit, totalChannels, channels),
generateExpectedCZ(0, defaultMonitorListLimit, totalChannels, channels),
generateExpectedCZ(1, defaultMonitorListLimit, totalChannels-1, channels[1:]),
generateExpectedCZ(10, defaultMonitorListLimit, 0, nil),
generateExpectedCZ(0, defaultMonitorListLimit, totalChannels, channels),
generateExpectedCZ(0, 1, 1, channels[:1]),
generateExpectedCZ(1, 2, 2, channels[1:1+2]),
}
for i := 0; i < len(paths); i++ {
resp, body := getBody(t, ChannelsPath+paths[i], expectedJSON)
defer resp.Body.Close()
cz := Channelsz{}
if err := json.Unmarshal(body, &cz); err != nil {
t.Fatalf("Got an error unmarshalling the body: %v", err)
}
resp.Body.Close()
goal := *expected[i]
// We cannot assume Now, so remove it for comparison
cz.Now = time.Time{}
if !reflect.DeepEqual(cz, goal) {
t.Fatalf("Iter=%v - Path=%q - Expected to get %v, got %v", i, ChannelsPath+paths[i], goal, cz)
}
}
cs := channelsGet(t, s.channels, "foo").store
// Produce store failure that prevents getting the list of channels
cs.Msgs = &msgStoreFailMsgState{MsgStore: cs.Msgs}
monitorExpectStatus(t, ChannelsPath+"?subs=1", http.StatusInternalServerError)
}
func TestMonitorChannelsWithSubsz(t *testing.T) {
resetPreviousHTTPConnections()
s := runMonitorServer(t, GetDefaultOptions())
defer s.Shutdown()
sc := NewDefaultConnection(t)
defer sc.Close()
channels := []string{"bar", "baz", "foo", "foo.bar"}
totalChannels := len(channels)
totalSubs := 0
for _, c := range channels {
cs := channelsLookupOrCreate(t, s, c)
for i := 0; i < rand.Intn(10)+1; i++ {
cs.store.Msgs.Store(&pb.MsgProto{Data: []byte("hello")})
}
numSubs := rand.Intn(4) + 1
totalSubs += numSubs
for i := 0; i < numSubs; i++ {
if _, err := sc.Subscribe(c, func(_ *stan.Msg) {}); err != nil {
t.Fatalf("Error on subscribe: %v", err)
}
}
if _, err := sc.Subscribe(c, func(_ *stan.Msg) {},
stan.DurableName(fmt.Sprintf("%s_dur", c))); err != nil {
t.Fatalf("Error on subscribe: %v", err)
}
totalSubs++
if _, err := sc.QueueSubscribe(c, "queue", func(_ *stan.Msg) {}); err != nil {
t.Fatalf("Error on subscribe: %v", err)
}
totalSubs++
}
waitForNumSubs(t, s, clientName, totalSubs)
generateExpectedCZ := func(offset, limit, count int, channels []string) *Channelsz {
channelsz := &Channelsz{
ClusterID: s.info.ClusterID,
ServerID: s.serverID,
Offset: offset,
Limit: limit,
Count: count,
Total: totalChannels,
}
if channels != nil {
channelsz.Channels = make([]*Channelz, 0, len(channels))
for _, c := range channels {
cs := s.channels.get(c)
if cs == nil {
continue
}
msgs, bytes := msgStoreState(t, cs.store.Msgs)
firstSeq, lastSeq := msgStoreFirstAndLastSequence(t, cs.store.Msgs)
channelz := &Channelz{
Name: c,
FirstSeq: firstSeq,
LastSeq: lastSeq,
Msgs: msgs,
Bytes: bytes,
}
ss := cs.ss
ss.RLock()
subscriptions := getChannelSubs(ss.psubs)
for _, dur := range ss.durables {
if dur.ClientID == "" {
subscriptions = append(subscriptions, createSubz(dur))
}
}
for _, qsub := range ss.qsubs {
qsub.RLock()
subscriptions = append(subscriptions, getChannelSubs(qsub.subs)...)
qsub.RUnlock()
}
ss.RUnlock()
channelz.SubsCount = len(subscriptions)
channelz.Subscriptions = subscriptions
channelsz.Channels = append(channelsz.Channels, channelz)
}
}
return channelsz
}
paths := []string{"?subs=1", "?offset=-1&subs=1", "?offset=1&subs=1", "?offset=10&subs=1", "?limit=-1&subs=1", "?limit=1&subs=1", "?offset=1&limit=2&subs=1"}
expected := []*Channelsz{
generateExpectedCZ(0, defaultMonitorListLimit, totalChannels, channels),