forked from mongodb/mongo-go-driver
/
initial_dns_seedlist_discovery_test.go
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/
initial_dns_seedlist_discovery_test.go
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// Copyright (C) MongoDB, Inc. 2017-present.
//
// 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
package integration
import (
"context"
"crypto/tls"
"io/ioutil"
"os"
"path"
"runtime"
"strings"
"testing"
"time"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/internal/testutil/assert"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/description"
"go.mongodb.org/mongo-driver/mongo/integration/mtest"
"go.mongodb.org/mongo-driver/mongo/options"
"go.mongodb.org/mongo-driver/mongo/readpref"
"go.mongodb.org/mongo-driver/x/mongo/driver/connstring"
"go.mongodb.org/mongo-driver/x/mongo/driver/topology"
)
const (
seedlistDiscoveryTestsBaseDir = "../../testdata/initial-dns-seedlist-discovery"
)
type seedlistTest struct {
URI string `bson:"uri"`
Seeds []string `bson:"seeds"`
NumSeeds *int `bson:"numSeeds"`
Hosts []string `bson:"hosts"`
NumHosts *int `bson:"numHosts"`
Error bool `bson:"error"`
Options bson.Raw `bson:"options"`
Ping *bool `bson:"ping"`
}
func TestInitialDNSSeedlistDiscoverySpec(t *testing.T) {
mt := mtest.New(t, noClientOpts)
defer mt.Close()
mt.RunOpts("replica set", mtest.NewOptions().Topologies(mtest.ReplicaSet).CreateClient(false), func(mt *mtest.T) {
mt.Parallel()
runSeedlistDiscoveryDirectory(mt, "replica-set")
})
mt.RunOpts("sharded", mtest.NewOptions().Topologies(mtest.Sharded).CreateClient(false), func(mt *mtest.T) {
mt.Parallel()
runSeedlistDiscoveryDirectory(mt, "sharded")
})
mt.RunOpts("load balanced", mtest.NewOptions().Topologies(mtest.LoadBalanced).CreateClient(false), func(mt *mtest.T) {
mt.Parallel()
runSeedlistDiscoveryDirectory(mt, "load-balanced")
})
}
func runSeedlistDiscoveryDirectory(mt *mtest.T, subdirectory string) {
directoryPath := path.Join(seedlistDiscoveryTestsBaseDir, subdirectory)
for _, file := range jsonFilesInDir(mt, directoryPath) {
mt.RunOpts(file, noClientOpts, func(mt *mtest.T) {
runSeedlistDiscoveryTest(mt, path.Join(directoryPath, file))
})
}
}
// runSeedlistDiscoveryPingTest will create a new connection using the test URI and attempt to "ping" the server.
func runSeedlistDiscoveryPingTest(mt *mtest.T, clientOpts *options.ClientOptions) {
ctx := context.Background()
client, err := mongo.Connect(ctx, clientOpts)
assert.Nil(mt, err, "Connect error: %v", err)
defer func() { _ = client.Disconnect(ctx) }()
// Create a context with a timeout to prevent the ping operation from blocking indefinitely.
pingCtx, cancel := context.WithTimeout(ctx, 1*time.Second)
defer cancel()
// Ping the server.
err = client.Ping(pingCtx, readpref.Nearest())
assert.Nil(mt, err, "Ping error: %v", err)
}
func runSeedlistDiscoveryTest(mt *mtest.T, file string) {
content, err := ioutil.ReadFile(file)
assert.Nil(mt, err, "ReadFile error for %v: %v", file, err)
var test seedlistTest
err = bson.UnmarshalExtJSONWithRegistry(specTestRegistry, content, false, &test)
assert.Nil(mt, err, "UnmarshalExtJSONWithRegistry error: %v", err)
if runtime.GOOS == "windows" && strings.HasSuffix(file, "/two-txt-records.json") {
mt.Skip("skipping to avoid windows multiple TXT record lookup bug")
}
if strings.HasPrefix(runtime.Version(), "go1.11") && strings.HasSuffix(file, "/one-txt-record-multiple-strings.json") {
mt.Skip("skipping to avoid go1.11 problem with multiple strings in one TXT record")
}
cs, err := connstring.ParseAndValidate(test.URI)
if test.Error {
assert.NotNil(mt, err, "expected URI parsing error, got nil")
return
}
assert.Nil(mt, err, "ParseAndValidate error: %v", err)
assert.Equal(mt, connstring.SchemeMongoDBSRV, cs.Scheme,
"expected scheme %v, got %v", connstring.SchemeMongoDBSRV, cs.Scheme)
// DNS records may be out of order from the test file's ordering.
actualSeedlist := buildSet(cs.Hosts)
// If NumSeeds is set, check number of seeds in seedlist.
if test.NumSeeds != nil {
assert.Equal(mt, len(actualSeedlist), *test.NumSeeds,
"expected %v seeds, got %v", *test.NumSeeds, len(actualSeedlist))
}
// If Seeds is set, check contents of seedlist.
if test.Seeds != nil {
expectedSeedlist := buildSet(test.Seeds)
assert.Equal(mt, expectedSeedlist, actualSeedlist, "expected seedlist %v, got %v", expectedSeedlist, actualSeedlist)
}
verifyConnstringOptions(mt, test.Options, cs)
tlsConfig := getSSLSettings(mt, test)
// Make a topology from the options.
opts := options.Client().ApplyURI(test.URI)
if tlsConfig != nil {
opts.SetTLSConfig(tlsConfig)
}
cfg, err := topology.NewConfig(opts, nil)
assert.Nil(mt, err, "error constructing toplogy config: %v", err)
topo, err := topology.New(cfg)
assert.Nil(mt, err, "topology.New error: %v", err)
err = topo.Connect()
assert.Nil(mt, err, "topology.Connect error: %v", err)
defer func() { _ = topo.Disconnect(context.Background()) }()
// If NumHosts is set, check number of hosts currently stored on the Topology.
if test.NumHosts != nil {
actualNumHosts := len(topo.Description().Servers)
assert.Equal(mt, *test.NumHosts, actualNumHosts, "expected to find %v hosts, found %v",
*test.NumHosts, actualNumHosts)
}
for _, host := range test.Hosts {
_, err := getServerByAddress(host, topo)
assert.Nil(mt, err, "error finding host %q: %v", host, err)
}
if ping := test.Ping; ping == nil || *ping {
runSeedlistDiscoveryPingTest(mt, opts)
}
}
func buildSet(list []string) map[string]struct{} {
set := make(map[string]struct{})
for _, s := range list {
set[s] = struct{}{}
}
return set
}
func verifyConnstringOptions(mt *mtest.T, expected bson.Raw, cs connstring.ConnString) {
mt.Helper()
elems, _ := expected.Elements()
for _, elem := range elems {
key := elem.Key()
opt := elem.Value()
switch key {
case "replicaSet":
rs := opt.StringValue()
assert.Equal(mt, rs, cs.ReplicaSet, "expected replicaSet value %v, got %v", rs, cs.ReplicaSet)
case "ssl":
ssl := opt.Boolean()
assert.Equal(mt, ssl, cs.SSL, "expected ssl value %v, got %v", ssl, cs.SSL)
case "authSource":
source := opt.StringValue()
assert.Equal(mt, source, cs.AuthSource, "expected auth source value %v, got %v", source, cs.AuthSource)
case "directConnection":
dc := opt.Boolean()
assert.True(mt, cs.DirectConnectionSet, "expected cs.DirectConnectionSet to be true, got false")
assert.Equal(mt, dc, cs.DirectConnection, "expected cs.DirectConnection to be %v, got %v", dc, cs.DirectConnection)
case "loadBalanced":
lb := opt.Boolean()
assert.True(mt, cs.LoadBalancedSet, "expected cs.LoadBalancedSet set to be true, got false")
assert.Equal(mt, lb, cs.LoadBalanced, "expected cs.LoadBalanced to be %v, got %v", lb, cs.LoadBalanced)
case "srvMaxHosts":
srvMaxHosts := opt.Int32()
assert.Equal(mt, srvMaxHosts, int32(cs.SRVMaxHosts), "expected cs.SRVMaxHosts to be %v, got %v", srvMaxHosts, cs.SRVMaxHosts)
case "srvServiceName":
srvName := opt.StringValue()
assert.Equal(mt, srvName, cs.SRVServiceName, "expected cs.SRVServiceName to be %q, got %q", srvName, cs.SRVServiceName)
default:
mt.Fatalf("unrecognized connstring option %v", key)
}
}
}
// Because the Go driver tests can be run either against a server with SSL enabled or without, a
// number of configurations have to be checked to ensure that the SRV tests are run properly.
//
// First, the "ssl" option in the JSON test description has to be checked. If this option is not
// present, we assume that the test will assert an error, so we proceed with the test as normal.
// If the option is false, then we skip the test if the server is running with SSL enabled.
// If the option is true, then we skip the test if the server is running without SSL enabled; if
// the server is running with SSL enabled, then we return a tls.Config with InsecureSkipVerify
// set to true.
func getSSLSettings(mt *mtest.T, test seedlistTest) *tls.Config {
ssl, err := test.Options.LookupErr("ssl")
if err != nil {
// No "ssl" option is specified
return nil
}
testCaseExpectsSSL := ssl.Boolean()
envSSL := os.Getenv("SSL") == "ssl"
// Skip non-SSL tests if the server is running with SSL.
if !testCaseExpectsSSL && envSSL {
mt.Skip("skipping test that does not expect ssl in an ssl environment")
}
// Skip SSL tests if the server is running without SSL.
if testCaseExpectsSSL && !envSSL {
mt.Skip("skipping test that expects ssl in a non-ssl environment")
}
// If SSL tests are running, set the CA file.
if testCaseExpectsSSL && envSSL {
tlsConfig := new(tls.Config)
tlsConfig.InsecureSkipVerify = true
return tlsConfig
}
return nil
}
func getServerByAddress(address string, topo *topology.Topology) (description.Server, error) {
selectByName := description.ServerSelectorFunc(func(_ description.Topology, servers []description.Server) ([]description.Server, error) {
for _, s := range servers {
if s.Addr.String() == address {
return []description.Server{s}, nil
}
}
return []description.Server{}, nil
})
selectedServer, err := topo.SelectServer(context.Background(), selectByName)
if err != nil {
return description.Server{}, err
}
// If the selected server is a topology.SelectedServer, then we can get the description without creating a
// connect pool.
topologySelectedServer, ok := selectedServer.(*topology.SelectedServer)
if ok {
return topologySelectedServer.Description().Server, nil
}
selectedServerConnection, err := selectedServer.Connection(context.Background())
if err != nil {
return description.Server{}, err
}
defer selectedServerConnection.Close()
return selectedServerConnection.Description(), nil
}