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main.go
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// Copyright (c) 2018 Couchbase, Inc.
// 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:https://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 main
import (
"bufio"
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"net"
"os"
"os/signal"
"reflect"
"sync"
"sync/atomic"
"time"
"xdcrDiffer/base"
"xdcrDiffer/dcp"
"xdcrDiffer/differ"
fdp "xdcrDiffer/fileDescriptorPool"
"xdcrDiffer/filterPool"
"xdcrDiffer/utils"
"github.com/couchbase/gocb/v2"
xdcrBase "github.com/couchbase/goxdcr/base"
xdcrParts "github.com/couchbase/goxdcr/base/filter"
xdcrLog "github.com/couchbase/goxdcr/log"
"github.com/couchbase/goxdcr/metadata"
"github.com/couchbase/goxdcr/metadata_svc"
"github.com/couchbase/goxdcr/service_def"
service_def_mock "github.com/couchbase/goxdcr/service_def/mocks"
"github.com/couchbase/goxdcr/service_impl"
"github.com/couchbase/goxdcr/streamApiWatcher"
xdcrUtils "github.com/couchbase/goxdcr/utils"
"github.com/stretchr/testify/mock"
)
var done = make(chan bool)
var options struct {
sourceUrl string
sourceUsername string
sourcePassword string
sourceBucketName string
remoteClusterName string
sourceFileDir string
targetUrl string
targetUsername string
targetPassword string
targetBucketName string
targetFileDir string
numberOfSourceDcpClients uint64
numberOfWorkersPerSourceDcpClient uint64
numberOfTargetDcpClients uint64
numberOfWorkersPerTargetDcpClient uint64
numberOfWorkersForFileDiffer uint64
numberOfWorkersForMutationDiffer uint64
numberOfBins uint64
numberOfFileDesc uint64
// the duration that the tools should be run, in minutes
completeByDuration uint64
// whether tool should complete after processing all mutations at tool start time
completeBySeqno bool
// directory for checkpoint files
checkpointFileDir string
// name of source cluster checkpoint file to load from when tool starts
// if not specified, source cluster will start from 0
oldSourceCheckpointFileName string
// name of target cluster checkpoint file to load from when tool starts
// if not specified, target cluster will start from 0
oldTargetCheckpointFileName string
// name of new checkpoint file to write to when tool shuts down
// if not specified, tool will not save checkpoint files
newCheckpointFileName string
// directory for storing diffs generated by file differ
fileDifferDir string
// output directory for mutation differ
mutationDifferDir string
// size of batch used by mutation differ
mutationDifferBatchSize uint64
// timeout, in seconds, used by mutation differ
mutationDifferTimeout uint64
// size of source dcp handler channel
sourceDcpHandlerChanSize uint64
// size of target dcp handler channel
targetDcpHandlerChanSize uint64
// timeout for bucket for stats collection, in seconds
bucketOpTimeout uint64
// max number of retry for get stats
maxNumOfGetStatsRetry uint64
// max number of retry for send batch
maxNumOfSendBatchRetry uint64
// retry interval for get stats, in seconds
getStatsRetryInterval uint64
// retry interval for send batch, in milliseconds
sendBatchRetryInterval uint64
// max backoff for get stats, in seconds
getStatsMaxBackoff uint64
// max backoff for send batch, in seconds
sendBatchMaxBackoff uint64
// delay between source cluster start up and target cluster start up, in seconds
delayBetweenSourceAndTarget uint64
//interval for periodical checkpointing, in seconds
// value of 0 indicates no periodical checkpointing
checkpointInterval uint64
// whether to run data generation
runDataGeneration bool
// whether to run file differ
runFileDiffer bool
// whether to verify diff keys through aysnc Get on clusters
runMutationDiffer bool
// Whether or not to enforce secure communications for data retrieval
enforceTLS bool
// Number of items kept in memory per binary buffer bucket
bucketBufferCapacity int
// Compare metadata, or body, or both
compareType string
// Number of times for mutationsDiffer to retry to resolve doc differences
mutationDifferRetries int
// Number of secs to wait between retries
mutationDifferRetriesWaitSecs int
// Number of filters to be created for the filter pool to be shared
numOfFiltersInFilterPool int
// Enables DEBUG level logs for xdcrDiffer and gocb verbose logging
debugMode bool
// a common setup timeout duration - in seconds
setupTimeout int
//string denoting the xattrs that shouldn't be compared
fileContaingXattrKeysForNoComapre string
}
func argParse() {
flag.StringVar(&options.sourceUrl, "sourceUrl", "",
"url for source cluster")
flag.StringVar(&options.sourceUsername, "sourceUsername", "",
"username for source cluster")
flag.StringVar(&options.sourcePassword, "sourcePassword", "",
"password for source cluster")
flag.StringVar(&options.sourceBucketName, "sourceBucketName", "",
"bucket name for source cluster")
flag.StringVar(&options.remoteClusterName, "remoteClusterName", "",
"Remote cluster reference name used when creating it")
flag.StringVar(&options.sourceFileDir, "sourceFileDir", base.SourceFileDir,
"directory to store mutations in source cluster")
flag.StringVar(&options.targetUrl, "targetUrl", "",
"url for target cluster")
flag.StringVar(&options.targetUsername, "targetUsername", "",
"username for target cluster")
flag.StringVar(&options.targetPassword, "targetPassword", "",
"password for target cluster")
flag.StringVar(&options.targetBucketName, "targetBucketName", "",
"bucket name for target cluster")
flag.StringVar(&options.targetFileDir, "targetFileDir", base.TargetFileDir,
"directory to store mutations in target cluster")
flag.Uint64Var(&options.numberOfSourceDcpClients, "numberOfSourceDcpClients", 1,
"number of source dcp clients")
flag.Uint64Var(&options.numberOfWorkersPerSourceDcpClient, "numberOfWorkersPerSourceDcpClient", 64,
"number of workers for each source dcp client")
flag.Uint64Var(&options.numberOfTargetDcpClients, "numberOfTargetDcpClients", 1,
"number of target dcp clients")
flag.Uint64Var(&options.numberOfWorkersPerTargetDcpClient, "numberOfWorkersPerTargetDcpClient", 64,
"number of workers for each target dcp client")
flag.Uint64Var(&options.numberOfWorkersForFileDiffer, "numberOfWorkersForFileDiffer", 30,
"number of worker threads for file differ ")
flag.Uint64Var(&options.numberOfWorkersForMutationDiffer, "numberOfWorkersForMutationDiffer", 30,
"number of worker threads for mutation differ ")
flag.Uint64Var(&options.numberOfBins, "numberOfBins", 5,
"number of buckets per vbucket")
flag.Uint64Var(&options.numberOfFileDesc, "numberOfFileDesc", 500,
"number of file descriptors")
flag.Uint64Var(&options.completeByDuration, "completeByDuration", 0,
"duration that the tool should run")
flag.BoolVar(&options.completeBySeqno, "completeBySeqno", true,
"whether tool should automatically complete (after processing all mutations at start time)")
flag.StringVar(&options.checkpointFileDir, "checkpointFileDir", base.CheckpointFileDir,
"directory for checkpoint files")
flag.StringVar(&options.oldSourceCheckpointFileName, "oldSourceCheckpointFileName", "",
"old source checkpoint file to load from when tool starts")
flag.StringVar(&options.oldTargetCheckpointFileName, "oldTargetCheckpointFileName", "",
"old target checkpoint file to load from when tool starts")
flag.StringVar(&options.newCheckpointFileName, "newCheckpointFileName", "",
"new checkpoint file to write to when tool shuts down")
flag.StringVar(&options.fileDifferDir, "fileDifferDir", base.FileDifferDir,
" directory for storing diffs generated by file differ")
flag.StringVar(&options.mutationDifferDir, "mutationDifferDir", base.MutationDifferDir,
" output directory for mutation differ")
flag.Uint64Var(&options.mutationDifferBatchSize, "mutationDifferBatchSize", 100,
"size of batch used by mutation differ")
flag.Uint64Var(&options.mutationDifferTimeout, "mutationDifferTimeout", 30,
"timeout, in seconds, used by mutation differ")
flag.Uint64Var(&options.sourceDcpHandlerChanSize, "sourceDcpHandlerChanSize", base.DcpHandlerChanSize,
"size of source dcp handler channel")
flag.Uint64Var(&options.targetDcpHandlerChanSize, "targetDcpHandlerChanSize", base.DcpHandlerChanSize,
"size of target dcp handler channel")
flag.Uint64Var(&options.bucketOpTimeout, "bucketOpTimeout", base.BucketOpTimeout,
" timeout for bucket for stats collection, in seconds")
flag.Uint64Var(&options.maxNumOfGetStatsRetry, "maxNumOfGetStatsRetry", base.MaxNumOfGetStatsRetry,
"max number of retry for get stats")
flag.Uint64Var(&options.maxNumOfSendBatchRetry, "maxNumOfSendBatchRetry", base.MaxNumOfSendBatchRetry,
"max number of retry for send batch")
flag.Uint64Var(&options.getStatsRetryInterval, "getStatsRetryInterval", base.GetStatsRetryInterval,
" retry interval for get stats, in seconds")
flag.Uint64Var(&options.sendBatchRetryInterval, "sendBatchRetryInterval", base.SendBatchRetryInterval,
"retry interval for send batch, in milliseconds")
flag.Uint64Var(&options.getStatsMaxBackoff, "getStatsMaxBackoff", base.GetStatsMaxBackoff,
"max backoff for get stats, in seconds")
flag.Uint64Var(&options.sendBatchMaxBackoff, "sendBatchMaxBackoff", base.SendBatchMaxBackoff,
"max backoff for send batch, in seconds")
flag.Uint64Var(&options.delayBetweenSourceAndTarget, "delayBetweenSourceAndTarget", base.DelayBetweenSourceAndTarget,
"delay between source cluster start up and target cluster start up, in seconds")
flag.Uint64Var(&options.checkpointInterval, "checkpointInterval", base.CheckpointInterval,
"interval for periodical checkpointing, in seconds")
flag.BoolVar(&options.runDataGeneration, "runDataGeneration", true,
" whether to run data generation")
flag.BoolVar(&options.runFileDiffer, "runFileDiffer", true,
" whether to file differ")
flag.BoolVar(&options.runMutationDiffer, "runMutationDiffer", true,
" whether to verify diff keys through aysnc Get on clusters")
flag.BoolVar(&options.enforceTLS, "enforceTLS", false,
" stops executing if pre-requisites are not in place to ensure TLS communications")
flag.IntVar(&options.bucketBufferCapacity, "bucketBufferCapacity", base.BucketBufferCapacity,
" number of items kept in memory per binary buffer bucket")
flag.StringVar(&options.compareType, "compareType", base.MutationCompareTypeMetadata,
" whether to compare meta, body, or both. Default meta")
flag.IntVar(&options.mutationDifferRetries, "mutationRetries", 0,
"Additional number of times to retry to resolve the mutation differences")
flag.IntVar(&options.mutationDifferRetriesWaitSecs, "mutationRetriesWaitSecs", 60,
"Seconds to wait in between retries for mutation differences")
flag.IntVar(&options.numOfFiltersInFilterPool, "numOfFiltersInFilterPool", 32,
"Number of filters to be created and shared among all DCP handlers")
flag.BoolVar(&options.debugMode, "debugMode", false,
"The differ to be run with debug log level and the SDK/gocb logging will also be enabled.")
flag.IntVar(&options.setupTimeout, "setupTimeout", base.SetupTimeoutSeconds,
"Common setup timeout duration in seconds")
flag.StringVar(&options.fileContaingXattrKeysForNoComapre, "fileContaingXattrKeysForNoComapre", "",
"Path to the file containing the Xattr keys for NoCompare ")
flag.Parse()
}
func validateCompareType(method string) {
for _, str := range base.MutationDiffCompareType {
if method == str {
return
}
}
fmt.Fprintf(os.Stderr, "Invalid compareType '%v'. Accepted values are %v\n", options.compareType, base.MutationDiffCompareType)
os.Exit(1)
}
func usage() {
fmt.Fprintf(os.Stderr, "Usage : %s [OPTIONS] \n", os.Args[0])
flag.PrintDefaults()
}
type diffToolStateType int
const (
StateInitial diffToolStateType = iota
StateDcpStarted diffToolStateType = iota
StateFinal diffToolStateType = iota
)
type difftoolState struct {
state diffToolStateType
mtx sync.Mutex
}
type xdcrDiffTool struct {
utils xdcrUtils.UtilsIface
metadataSvc service_def.MetadataSvc
remoteClusterSvc service_def.RemoteClusterSvc
replicationSpecSvc service_def.ReplicationSpecSvc
collectionsManifestsSvc service_def.CollectionsManifestSvc
bucketTopologySvc service_def.BucketTopologySvc
logger *xdcrLog.CommonLogger
xdcrTopologySvc service_def.XDCRCompTopologySvc
selfRef *metadata.RemoteClusterReference
selfRefPopulated uint32
specifiedRef *metadata.RemoteClusterReference
specifiedSpec *metadata.ReplicationSpecification
filter xdcrParts.Filter
selfDefaultPoolInfo map[string]interface{}
selfPoolsNodes map[string]interface{}
srcCapabilities metadata.Capability
tgtCapabilities metadata.Capability
srcClusterCompat int
srcBucketManifest *metadata.CollectionsManifest
tgtBucketManifest *metadata.CollectionsManifest
// If non-empty, just stream these collection IDs from each side's DCP
srcCollectionIds []uint32
tgtCollectionIds []uint32
// Logically there should only be 1-1 mapping, but make this flexible just in case
srcToTgtColIdsMap map[uint32][]uint32
// For collections migration mode, each filter should cause one or more target collection IDs
colFilterToTgtColIdsMap map[string][]uint32
// Each filter string above is translated into a consistent ordered list below. The *index* of each filter
// string will then be used for the remainder of the differ protocol, and used to determine if a source mutation
// has passed a certain filter or not
colFilterOrderedKeys []string
colFilterOrderedTargetNs []*xdcrBase.CollectionNamespace
colFilterOrderedTargetColId []uint32
// Used for migration mapping
migrationMapping metadata.CollectionNamespaceMapping
duplicatedMapping differ.DuplicatedHintMap
sourceDcpDriver *dcp.DcpDriver
targetDcpDriver *dcp.DcpDriver
curState difftoolState
legacyMode bool
//Xattr Keys to be excluded for comparison
xattrKeysForNoCompare map[string]bool
}
func staticHostAddr() string {
return "http:https://" + options.sourceUrl
}
func NewDiffTool(legacyMode bool) (*xdcrDiffTool, error) {
var err error
difftool := &xdcrDiffTool{
utils: xdcrUtils.NewUtilities(),
legacyMode: legacyMode,
srcToTgtColIdsMap: make(map[uint32][]uint32),
colFilterToTgtColIdsMap: map[string][]uint32{},
xattrKeysForNoCompare: map[string]bool{},
}
if options.fileContaingXattrKeysForNoComapre != "" {
readFile, er := os.Open(options.fileContaingXattrKeysForNoComapre)
if er != nil {
fmt.Printf("Error in reading the file %v. err=%v\n", options.fileContaingXattrKeysForNoComapre, err)
return nil, er
}
fileScanner := bufio.NewScanner(readFile)
fileScanner.Split(bufio.ScanLines)
for fileScanner.Scan() {
difftool.xattrKeysForNoCompare[fileScanner.Text()] = true
}
}
// HLV and ImportCas needs to be stripped from the Xattrs
difftool.xattrKeysForNoCompare[xdcrBase.XATTR_HLV] = true
difftool.xattrKeysForNoCompare[xdcrBase.XATTR_MOU] = true
difftool.xattrKeysForNoCompare[xdcrBase.XATTR_MOBILE] = true
logCtx := xdcrLog.DefaultLoggerContext
difftool.logger = xdcrLog.NewLogger("xdcrDiffTool", xdcrLog.DefaultLoggerContext)
if options.debugMode {
logCtx.SetLogLevel(xdcrLog.LogLevelDebug)
gocb.SetLogger(gocb.VerboseStdioLogger())
}
var poolsInfo map[string]interface{}
var sourceClusterUUID string
err, statusCode := difftool.utils.QueryRestApi(staticHostAddr(), xdcrBase.PoolsPath, false, xdcrBase.MethodGet, "", nil, 0, &poolsInfo, difftool.logger)
if err != nil || statusCode != 200 {
return nil, fmt.Errorf("Failed on calling %v, err=%v, statusCode=%v\n", xdcrBase.PoolsPath, err, statusCode)
}
// note that xdcrBase.RemoteClusterUuid is purely "uuid" and can be used for local cluster UUID as well
uuidObj, ok := poolsInfo[xdcrBase.RemoteClusterUuid]
if !ok {
return nil, fmt.Errorf("Could not get uuid of local cluster.\n")
}
sourceClusterUUID = uuidObj.(string)
difftool.selfRef, _ = metadata.NewRemoteClusterReference(sourceClusterUUID, base.SelfReferenceName, options.sourceUrl, options.sourceUsername, options.sourcePassword,
"", false, "", nil, nil, nil, nil)
if !legacyMode {
difftool.metadataSvc, err = metadata_svc.NewMetaKVMetadataSvc(nil, difftool.utils, true /*readOnly*/)
if err != nil {
return nil, err
}
uiLogSvcMock := &service_def_mock.UILogSvc{}
uiLogSvcMock.On("Write", mock.Anything).Run(func(args mock.Arguments) { fmt.Printf("%v", args.Get(0).(string)) }).Return(nil)
xdcrTopologyMock := &service_def_mock.XDCRCompTopologySvc{}
xdcrTopologyMockSetupCb := func() {
setupXdcrToplogyMock(xdcrTopologyMock, difftool)
}
resolverSvcMock := &service_def_mock.ResolverSvcIface{}
checkpointSvcMock := &service_def_mock.CheckpointsService{}
manifestsSvcMock := &service_def_mock.ManifestsService{}
manifestsSvcMock.On("GetSourceManifests", mock.Anything).Return(nil, service_def.MetadataNotFoundErr)
manifestsSvcMock.On("GetTargetManifests", mock.Anything).Return(nil, service_def.MetadataNotFoundErr)
replicationSettingSvc := metadata_svc.NewReplicationSettingsSvc(difftool.metadataSvc, nil, xdcrTopologyMock)
difftool.remoteClusterSvc, err = metadata_svc.NewRemoteClusterService(uiLogSvcMock, difftool.metadataSvc, xdcrTopologyMock,
xdcrLog.DefaultLoggerContext, difftool.utils)
if err != nil {
return nil, err
}
if err = difftool.retrieveClustersCapabilities(legacyMode, xdcrTopologyMockSetupCb); err != nil {
return nil, err
}
difftool.replicationSpecSvc, err = metadata_svc.NewReplicationSpecService(uiLogSvcMock, difftool.remoteClusterSvc,
difftool.metadataSvc, xdcrTopologyMock, resolverSvcMock, difftool.logger.LoggerContext(), difftool.utils,
replicationSettingSvc)
if err != nil {
return nil, err
}
err = difftool.retrieveReplicationSpecInfo()
if err != nil {
return nil, err
}
securitySvc := &service_def_mock.SecuritySvc{}
setupSecuritySvcMock(securitySvc)
err = setupMyKVNodes(xdcrTopologyMock, difftool)
if err != nil {
return nil, err
}
difftool.bucketTopologySvc, err = service_impl.NewBucketTopologyService(xdcrTopologyMock, difftool.remoteClusterSvc,
difftool.utils, xdcrBase.TopologyChangeCheckInterval, difftool.logger.LoggerContext(),
difftool.replicationSpecSvc, xdcrBase.HealthCheckInterval, securitySvc, streamApiWatcher.GetStreamApiWatcher)
if err != nil {
return nil, err
}
difftool.collectionsManifestsSvc, err = metadata_svc.NewCollectionsManifestService(difftool.remoteClusterSvc,
difftool.replicationSpecSvc, uiLogSvcMock, difftool.logger.LoggerContext(), difftool.utils, checkpointSvcMock,
xdcrTopologyMock, difftool.bucketTopologySvc, manifestsSvcMock)
if err != nil {
return nil, err
}
difftool.logger.Infof("Source cluster supports collections: %v Target cluster supports collections: %v\n",
difftool.srcCapabilities.HasCollectionSupport(), difftool.tgtCapabilities.HasCollectionSupport())
if difftool.srcCapabilities.HasCollectionSupport() || difftool.tgtCapabilities.HasCollectionSupport() {
err = difftool.populateCollectionsPreReq()
if err != nil {
return nil, err
}
}
} else {
// Need to do this outside of legacy mode
if err := difftool.retrieveClustersCapabilities(legacyMode, nil); err != nil {
return nil, err
}
}
// Capture any Ctrl-C for continuing to next steps or cleanup
go difftool.monitorInterruptSignal()
return difftool, err
}
func setupSecuritySvcMock(securitySvc *service_def_mock.SecuritySvc) {
securitySvc.On("IsClusterEncryptionLevelStrict").Return(false)
}
// This may be re-set up once self-reference is populated
func setupXdcrToplogyMock(xdcrTopologyMock *service_def_mock.XDCRCompTopologySvc, diffTool *xdcrDiffTool) {
xdcrTopologyMock.On("IsMyClusterEnterprise").Return(true, nil)
xdcrTopologyMock.On("IsKVNode").Return(true, nil)
xdcrTopologyMock.On("IsMyClusterEncryptionLevelStrict").Return(false)
xdcrTopologyMock.On("MyClusterCompatibility").Return(diffTool.srcClusterCompat, nil)
setupTopologyMockCredentials(xdcrTopologyMock, diffTool)
setupTopologyMockConnectionString(xdcrTopologyMock, diffTool)
}
func setupMyKVNodes(topologyMock *service_def_mock.XDCRCompTopologySvc, diffTool *xdcrDiffTool) error {
// As of XDCR v8, pools/nodes endpoint is gone so we need to do things the legacy way
nodesInfo := diffTool.selfPoolsNodes
if nodes, ok := nodesInfo[base.NodesKey]; !ok {
return fmt.Errorf("%v is not found from pools/nodes output", base.NodesKey)
} else if nodesList, ok := nodes.([]interface{}); !ok {
return fmt.Errorf("nodesList is not an interface list")
} else {
var found bool
for _, node := range nodesList {
nodeInfoMap, ok := node.(map[string]interface{})
if !ok {
// should never get here
return fmt.Errorf("node type is %v", reflect.TypeOf(node))
}
thisNode, ok := nodeInfoMap[xdcrBase.ThisNodeKey]
if ok {
thisNodeBool, ok := thisNode.(bool)
if !ok {
// should never get here
return fmt.Errorf("thisNode is %v", reflect.TypeOf(thisNode))
}
if thisNodeBool {
// found current node
found = true
}
}
if found {
ports := nodeInfoMap[xdcrBase.PortsKey]
portsMap := ports.(map[string]interface{})
directPort := portsMap[xdcrBase.DirectPortKey]
directPortFloat := directPort.(float64)
memcachedPort := uint16(directPortFloat)
hostAddr := nodeInfoMap[xdcrBase.HostNameKey]
hostAddrStr := hostAddr.(string)
hostName := xdcrBase.GetHostName(hostAddrStr)
memcachedAddr := xdcrBase.GetHostAddr(hostName, memcachedPort)
topologyMock.On("MyKVNodes").Return([]string{memcachedAddr}, nil)
break
}
}
if !found {
return fmt.Errorf("Unable to set memcached port")
}
}
return nil
}
func setupTopologyMockConnectionString(xdcrTopologyMock *service_def_mock.XDCRCompTopologySvc, diffTool *xdcrDiffTool) {
connFunc := func() string {
if atomic.LoadUint32(&diffTool.selfRefPopulated) == 1 {
connStr, _ := diffTool.selfRef.MyConnectionStr()
return connStr
} else {
return ""
}
}
errFunc := func() error {
if atomic.LoadUint32(&diffTool.selfRefPopulated) == 1 {
return nil
} else {
return fmt.Errorf("Not initialized yet")
}
}
xdcrTopologyMock.On("MyConnectionStr").Return(connFunc, errFunc)
}
func setupTopologyMockCredentials(xdcrTopologyMock *service_def_mock.XDCRCompTopologySvc, diffTool *xdcrDiffTool) {
getUserName := func() string {
if atomic.LoadUint32(&diffTool.selfRefPopulated) == 1 {
return diffTool.selfRef.UserName()
} else {
return ""
}
}
getPw := func() string {
if atomic.LoadUint32(&diffTool.selfRefPopulated) == 1 {
return diffTool.selfRef.Password()
} else {
return ""
}
}
getAuthMech := func() xdcrBase.HttpAuthMech {
if atomic.LoadUint32(&diffTool.selfRefPopulated) == 1 {
return diffTool.selfRef.HttpAuthMech()
} else {
return xdcrBase.HttpAuthMechPlain
}
}
getCert := func() []byte {
if atomic.LoadUint32(&diffTool.selfRefPopulated) == 1 {
return diffTool.selfRef.Certificates()
} else {
return nil
}
}
getSanCert := func() bool {
if atomic.LoadUint32(&diffTool.selfRefPopulated) == 1 {
return diffTool.selfRef.SANInCertificate()
} else {
return false
}
}
getClientCert := func() []byte {
if atomic.LoadUint32(&diffTool.selfRefPopulated) == 1 {
return diffTool.selfRef.ClientCertificate()
} else {
return nil
}
}
getClientKey := func() []byte {
if atomic.LoadUint32(&diffTool.selfRefPopulated) == 1 {
return diffTool.selfRef.ClientKey()
} else {
return nil
}
}
getErr := func() error {
if atomic.LoadUint32(&diffTool.selfRefPopulated) == 1 {
return nil
} else {
return fmt.Errorf("Not initialized yet")
}
}
xdcrTopologyMock.On("MyCredentials").Return(getUserName, getPw, getAuthMech, getCert, getSanCert, getClientCert, getClientKey, getErr)
}
func maybeSetEnv(key, value string) {
if os.Getenv(key) != "" {
return
}
os.Setenv(key, value)
}
func main() {
argParse()
base.SetupTimeoutSeconds = options.setupTimeout
validateCompareType(options.compareType)
fmt.Printf("differ is run with options: %+v\n", options)
legacyMode := len(options.targetUsername) > 0
if err := setupDirectories(); err != nil {
fmt.Printf("Unable to set up directory structure: %v\n", err)
os.Exit(1)
}
difftool, err := NewDiffTool(legacyMode)
if err != nil {
fmt.Printf("Error creating difftool: %v\n", err)
os.Exit(1)
}
if options.enforceTLS {
// For using certificates, the source cluster must be on a loopback device since we will be retrieving the
// source cluster's certificate to prevent sniffing
if !isURLLoopBack(options.sourceUrl) {
fmt.Printf("enforceTLS options requires that source addr %v to use loopback device\n", options.sourceUrl)
os.Exit(1)
}
}
if legacyMode {
if options.enforceTLS {
fmt.Printf("enforceTLS option is not compatible with legacyMode")
os.Exit(1)
}
// OK to ignore metakv err in manual mode
if err := difftool.populateTemporarySpecAndRef(); err != nil {
fmt.Printf("%v\n", err)
os.Exit(1)
}
}
if options.runDataGeneration {
err := difftool.generateDataFiles()
if err != nil {
fmt.Printf("Error generating data files. err=%v\n", err)
os.Exit(1)
}
} else {
fmt.Printf("Skipping generating data files since it has been disabled\n")
}
if options.runFileDiffer {
err := difftool.diffDataFiles()
if err != nil {
fmt.Printf("Error running file difftool. err=%v\n", err)
os.Exit(1)
}
} else {
fmt.Printf("Skipping file difftool since it has been disabled\n")
}
if options.runMutationDiffer {
difftool.runMutationDiffer()
} else {
fmt.Printf("Skipping mutation diff since it has been disabled\n")
}
}
func isURLLoopBack(url string) bool {
IPLoopbackCheck := net.ParseIP(xdcrBase.GetHostName(url))
hostNameIsLocalHost := xdcrBase.GetHostName(url) == "localhost"
return IPLoopbackCheck.IsLoopback() || hostNameIsLocalHost
}
func setupDirectories() error {
err := os.MkdirAll(options.sourceFileDir, 0777)
if err != nil {
fmt.Printf("Error mkdir sourceFileDir: %v\n", err)
}
err = os.MkdirAll(options.targetFileDir, 0777)
if err != nil {
fmt.Printf("Error mkdir targetFileDir: %v\n", err)
}
err = os.MkdirAll(options.checkpointFileDir, 0777)
if err != nil {
// it is ok for checkpoint dir to be existing, since we do not clean it up
fmt.Printf("Error mkdir checkpointFileDir: %v\n", err)
}
return nil
}
func (difftool *xdcrDiffTool) createFilter() error {
var ok bool
var expr string
expr, ok = difftool.specifiedSpec.Settings.Values[metadata.FilterExpressionKey].(string)
filterMode := difftool.specifiedSpec.Settings.GetExpDelMode()
if ok && len(expr) > 0 {
var filterVersion xdcrBase.FilterVersionType
if filterVersion, ok = difftool.specifiedSpec.Settings.Values[metadata.FilterVersionKey].(xdcrBase.FilterVersionType); !ok {
err := fmt.Errorf("Unable to find filter version given filter expression %v\nsettings:%v\n", expr, difftool.specifiedSpec.Settings)
return err
}
if filterVersion == xdcrBase.FilterVersionKeyOnly {
expr = xdcrBase.UpgradeFilter(expr)
}
difftool.logger.Infof("Found filtering expression: %v\n", expr)
}
mobileCompat := difftool.specifiedSpec.Settings.GetMobileCompatible()
filter, err := filterPool.NewFilterPool(options.numOfFiltersInFilterPool, expr, difftool.utils, filterMode, mobileCompat)
difftool.filter = filter
return err
}
func (difftool *xdcrDiffTool) generateDataFiles() error {
difftool.logger.Infof("GenerateDataFiles routine started\n")
defer difftool.logger.Infof("GenerateDataFiles routine completed\n")
if options.completeByDuration == 0 && !options.completeBySeqno {
difftool.logger.Infof("completeByDuration is required when completeBySeqno is false\n")
os.Exit(1)
}
errChan := make(chan error, 1)
waitGroup := &sync.WaitGroup{}
var fileDescPool fdp.FdPoolIface
if options.numberOfFileDesc > 0 {
fileDescPool = fdp.NewFileDescriptorPool(int(options.numberOfFileDesc))
}
if err := difftool.createFilter(); err != nil {
difftool.logger.Errorf("Error creating filter: %v", err.Error())
os.Exit(1)
}
difftool.sourceDcpDriver = startDcpDriver(difftool.logger, base.SourceClusterName, options.sourceUrl, difftool.specifiedSpec.SourceBucketName,
difftool.selfRef, options.sourceFileDir, options.checkpointFileDir,
options.oldSourceCheckpointFileName, options.newCheckpointFileName, options.numberOfSourceDcpClients,
options.numberOfWorkersPerSourceDcpClient, options.numberOfBins, options.sourceDcpHandlerChanSize,
options.bucketOpTimeout, options.maxNumOfGetStatsRetry, options.getStatsRetryInterval,
options.getStatsMaxBackoff, options.checkpointInterval, errChan, waitGroup, options.completeBySeqno, fileDescPool, difftool.filter,
difftool.srcCapabilities, difftool.srcCollectionIds, difftool.colFilterOrderedKeys, difftool.utils, options.bucketBufferCapacity,
difftool.migrationMapping, difftool.specifiedSpec.Settings.GetMobileCompatible(), difftool.specifiedSpec.Settings.GetExpDelMode(), difftool.xattrKeysForNoCompare)
delayDurationBetweenSourceAndTarget := time.Duration(options.delayBetweenSourceAndTarget) * time.Second
difftool.logger.Infof("Waiting for %v before starting target dcp clients\n", delayDurationBetweenSourceAndTarget)
time.Sleep(delayDurationBetweenSourceAndTarget)
difftool.logger.Infof("Starting target dcp clients\n")
difftool.targetDcpDriver = startDcpDriver(difftool.logger, base.TargetClusterName, difftool.specifiedRef.HostName_,
difftool.specifiedSpec.TargetBucketName, difftool.specifiedRef,
options.targetFileDir, options.checkpointFileDir, options.oldTargetCheckpointFileName, options.newCheckpointFileName,
options.numberOfTargetDcpClients, options.numberOfWorkersPerTargetDcpClient, options.numberOfBins, options.targetDcpHandlerChanSize,
options.bucketOpTimeout, options.maxNumOfGetStatsRetry, options.getStatsRetryInterval, options.getStatsMaxBackoff,
options.checkpointInterval, errChan, waitGroup, options.completeBySeqno, fileDescPool, difftool.filter,
difftool.tgtCapabilities, difftool.tgtCollectionIds, difftool.colFilterOrderedKeys, difftool.utils, options.bucketBufferCapacity,
difftool.migrationMapping, difftool.specifiedSpec.Settings.GetMobileCompatible(), difftool.specifiedSpec.Settings.GetExpDelMode(), difftool.xattrKeysForNoCompare)
difftool.curState.mtx.Lock()
difftool.curState.state = StateDcpStarted
difftool.curState.mtx.Unlock()
var err error
if options.completeBySeqno {
err = difftool.waitForCompletion(difftool.sourceDcpDriver, difftool.targetDcpDriver, errChan, waitGroup)
} else {
err = difftool.waitForDuration(difftool.sourceDcpDriver, difftool.targetDcpDriver, errChan, options.completeByDuration, delayDurationBetweenSourceAndTarget)
}
return err
}
func (difftool *xdcrDiffTool) diffDataFiles() error {
difftool.logger.Infof("DiffDataFiles routine started\n")
defer difftool.logger.Infof("DiffDataFiles routine completed\n")
err := os.RemoveAll(options.fileDifferDir)
if err != nil {
difftool.logger.Errorf("Error removing fileDifferDir: %v\n", err)
}
err = os.MkdirAll(options.fileDifferDir, 0777)
if err != nil {
return fmt.Errorf("Error mkdir fileDifferDir: %v\n", err)
}
difftoolDriver := differ.NewDifferDriver(options.sourceFileDir, options.targetFileDir, options.fileDifferDir,
base.DiffKeysFileName, int(options.numberOfWorkersForFileDiffer), int(options.numberOfBins),
int(options.numberOfFileDesc), difftool.srcToTgtColIdsMap, difftool.colFilterOrderedKeys, difftool.colFilterOrderedTargetColId, difftool.selfRef.Uuid_, difftool.specifiedRef.Uuid_, difftool.specifiedSpec.SourceBucketUUID, difftool.specifiedSpec.TargetBucketUUID, difftool.bucketTopologySvc, difftool.specifiedSpec, difftool.logger)
err = difftoolDriver.Run()
if err != nil {
difftool.logger.Errorf("Error from diffDataFiles = %v\n", err)
}
difftoolDriver.MapLock.RLock()
if difftool.colFilterOrderedKeys == nil {
difftool.logger.Infof("Source vb to item count map: %v", difftoolDriver.SrcVbItemCntMap)
}
difftool.logger.Infof("Target vb to item count map: %v", difftoolDriver.TgtVbItemCntMap)
difftoolDriver.MapLock.RUnlock()
if difftool.colFilterOrderedKeys == nil {
difftool.logger.Infof("Source bucket item count including tombstones is %v (excluding %v filtered mutations)", difftoolDriver.SourceItemCount, difftool.sourceDcpDriver.FilteredCount())
} else {
difftool.logger.Infof("Replication is in migration mode from the source bucket")
}
difftool.logger.Infof("Target bucket item count including tombstones is %v (excluding %v filtered mutations)", difftoolDriver.TargetItemCount, difftool.targetDcpDriver.FilteredCount())
if difftool.colFilterOrderedKeys == nil && difftoolDriver.SourceItemCount != difftoolDriver.TargetItemCount {
difftool.logger.Infof("Here are the vbuckets with different item counts:")
for vb, c1 := range difftoolDriver.SrcVbItemCntMap {
c2 := difftoolDriver.TgtVbItemCntMap[vb]
if c1 != c2 {
difftool.logger.Infof("vb:%v source count %v, target count %v", vb, c1, c2)
}
}
}
difftool.duplicatedMapping = difftoolDriver.DuplicatedHint
return err
}
func (difftool *xdcrDiffTool) runMutationDiffer() {
difftool.logger.Infof("runMutationDiffer started with compareBody=%v\n", options.compareType)
defer difftool.logger.Infof("runMutationDiffer completed\n")
err := os.RemoveAll(options.mutationDifferDir)
if err != nil {
difftool.logger.Errorf("Error removing mutationDifferDir: %v\n", err)
}
err = os.MkdirAll(options.mutationDifferDir, 0777)
if err != nil {
err = fmt.Errorf("Error mkdir mutationDifferDir: %v\n", err)
return
}
mutationDiffer := differ.NewMutationDiffer(difftool.selfRef.Uuid_, difftool.specifiedSpec.SourceBucketName, difftool.specifiedSpec.SourceBucketUUID,
difftool.selfRef, difftool.specifiedRef.Uuid_, difftool.specifiedSpec.TargetBucketName, difftool.specifiedSpec.TargetBucketUUID, difftool.specifiedRef,
options.fileDifferDir, options.mutationDifferDir, int(options.numberOfWorkersForMutationDiffer),
int(options.mutationDifferBatchSize), int(options.mutationDifferTimeout), int(options.maxNumOfSendBatchRetry),
time.Duration(options.sendBatchRetryInterval)*time.Millisecond,
time.Duration(options.sendBatchMaxBackoff)*time.Second, options.compareType, difftool.logger, difftool.srcToTgtColIdsMap,
difftool.srcCapabilities, difftool.tgtCapabilities, difftool.utils, options.mutationDifferRetries,
options.mutationDifferRetriesWaitSecs, difftool.duplicatedMapping)
err = mutationDiffer.Run()
if err != nil {
difftool.logger.Errorf("Error from runMutationDiffer = %v\n", err)
}
}
func startDcpDriver(logger *xdcrLog.CommonLogger, name, url, bucketName string, ref *metadata.RemoteClusterReference, fileDir, checkpointFileDir, oldCheckpointFileName, newCheckpointFileName string, numberOfDcpClients, numberOfWorkersPerDcpClient, numberOfBins, dcpHandlerChanSize, bucketOpTimeout, maxNumOfGetStatsRetry, getStatsRetryInterval, getStatsMaxBackoff, checkpointInterval uint64, errChan chan error, waitGroup *sync.WaitGroup, completeBySeqno bool, fdPool fdp.FdPoolIface, filter xdcrParts.Filter, capabilities metadata.Capability, collectionIDs []uint32, colMigrationFilters []string, utils xdcrUtils.UtilsIface, bucketBufferCap int, migrationMapping metadata.CollectionNamespaceMapping, mobileCompat int, expDelMode xdcrBase.FilterExpDelType, xattrKeysForNoCompare map[string]bool) *dcp.DcpDriver {
waitGroup.Add(1)
dcpDriver := dcp.NewDcpDriver(logger, name, url, bucketName, ref, fileDir, checkpointFileDir, oldCheckpointFileName,
newCheckpointFileName, int(numberOfDcpClients), int(numberOfWorkersPerDcpClient), int(numberOfBins),
int(dcpHandlerChanSize), time.Duration(bucketOpTimeout)*time.Second, int(maxNumOfGetStatsRetry),
time.Duration(getStatsRetryInterval)*time.Second, time.Duration(getStatsMaxBackoff)*time.Second,
int(checkpointInterval), errChan, waitGroup, completeBySeqno, fdPool, filter, capabilities, collectionIDs, colMigrationFilters,
utils, bucketBufferCap, migrationMapping, mobileCompat, expDelMode, xattrKeysForNoCompare)
// dcp driver startup may take some time. Do it asynchronously
go startDcpDriverAysnc(dcpDriver, errChan, logger)
return dcpDriver
}
func startDcpDriverAysnc(dcpDriver *dcp.DcpDriver, errChan chan error, logger *xdcrLog.CommonLogger) {
err := dcpDriver.Start()
if err != nil {
logger.Errorf("Error starting dcp driver %v. err=%v\n", dcpDriver.Name, err)
utils.AddToErrorChan(errChan, err)
}
}
func (difftool *xdcrDiffTool) waitForCompletion(sourceDcpDriver, targetDcpDriver *dcp.DcpDriver, errChan chan error, waitGroup *sync.WaitGroup) error {
doneChan := make(chan bool, 1)
go utils.WaitForWaitGroup(waitGroup, doneChan)
select {
case err := <-errChan:
difftool.logger.Errorf("Stop diff generation due to error from dcp client %v\n", err)
err1 := sourceDcpDriver.Stop()
if err1 != nil {
difftool.logger.Errorf("Error stopping source dcp client. err=%v\n", err1)
}
err1 = targetDcpDriver.Stop()
if err1 != nil {
difftool.logger.Errorf("Error stopping target dcp client. err=%v\n", err1)
}
return err
case <-doneChan:
difftool.logger.Infof("Source cluster and target cluster have completed\n")
return nil
}
return nil
}
func (difftool *xdcrDiffTool) waitForDuration(sourceDcpDriver, targetDcpDriver *dcp.DcpDriver, errChan chan error, duration uint64, delayDurationBetweenSourceAndTarget time.Duration) (err error) {
timer := time.NewTimer(time.Duration(duration) * time.Second)
select {
case err = <-errChan:
difftool.logger.Errorf("Stop diff generation due to error from dcp client %v\n", err)
case <-timer.C:
difftool.logger.Infof("Stop diff generation after specified processing duration\n")
}
err1 := sourceDcpDriver.Stop()
if err1 != nil {
difftool.logger.Errorf("Error stopping source dcp client. err=%v\n", err1)
}
time.Sleep(delayDurationBetweenSourceAndTarget)
err1 = targetDcpDriver.Stop()
if err1 != nil {
difftool.logger.Errorf("Error stopping target dcp client. err=%v\n", err1)
}
return err
}
func (difftool *xdcrDiffTool) retrieveReplicationSpecInfo() error {
// CBAUTH has already been setup
var err error
if options.enforceTLS && !difftool.specifiedRef.IsHttps() {
err = fmt.Errorf("enforceTLS requires that the remote cluster reference %v to use Full-Encryption mode", difftool.specifiedRef.Name())
difftool.logger.Errorf(err.Error())
return err
}
if options.targetUsername != "" && options.targetUsername != difftool.specifiedRef.UserName() && options.targetPassword != "" && options.targetPassword != difftool.specifiedRef.Password() {
err = fmt.Errorf("user-specified username and password is different from that of the credentials from reference %v", difftool.specifiedRef.Name())
difftool.logger.Errorf(err.Error())
return err
}
specMap, err := difftool.replicationSpecSvc.AllReplicationSpecs()
if err != nil {
difftool.logger.Errorf("Error retrieving specs: %v\n", err)
return err
}
for _, spec := range specMap {
if spec.SourceBucketName == options.sourceBucketName && spec.TargetBucketName == options.targetBucketName && spec.TargetClusterUUID == difftool.specifiedRef.Uuid() {
difftool.specifiedSpec = spec
break
}
}
if difftool.specifiedSpec == nil {
difftool.logger.Warnf("Unable to find Replication Spec with source %v target %v, attempting to create a temporary one\n", options.sourceBucketName, options.targetBucketName)
// Create a dummy spec
difftool.specifiedSpec, err = metadata.NewReplicationSpecification(options.sourceBucketName, "" /*sourceBucketUUID*/, difftool.specifiedRef.Uuid(), options.targetBucketName, "" /*targetBucketUUID*/)
if err != nil {
difftool.logger.Errorf(err.Error())
}
return err
}
difftool.logger.Infof("Found Remote Cluster: %v and Replication Spec: %v\n", difftool.specifiedRef.String(), difftool.specifiedSpec.String())
return nil
}
func (difftool *xdcrDiffTool) populateTemporarySpecAndRef() error {
var err error
difftool.specifiedSpec, err = metadata.NewReplicationSpecification(options.sourceBucketName, "", /*sourceBucketUUID*/
"" /*targetClusterUUID*/, options.targetBucketName, "" /*targetBucketUUID*/)
if err != nil {
return fmt.Errorf("populateTemporarySpecAndRef() - %v", err)
}
difftool.specifiedRef, err = metadata.NewRemoteClusterReference("" /*uuid*/, options.remoteClusterName /*name*/, options.targetUrl, options.targetUsername, options.targetPassword,
"", false, "", nil, nil, nil, nil)
if err != nil {
return fmt.Errorf("populateTemporarySpecAndRef() - %v", err)
}
err = difftool.populateSelfRef()
if err != nil {
return fmt.Errorf("populateTemporarySpecAndRef() - %v", err)
}
return err
}
func (difftool *xdcrDiffTool) monitorInterruptSignal() {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)