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package transport
import (
"flag"
"fmt"
"io"
"net"
"sync"
"sync/atomic"
"time"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/consts"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/encoding"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/handshake"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/netutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
"github.com/VictoriaMetrics/metrics"
)
var (
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maxTagKeysPerSearch = flag . Int ( "search.maxTagKeys" , 100e3 , "The maximum number of tag keys returned per search" )
maxTagValuesPerSearch = flag . Int ( "search.maxTagValues" , 100e3 , "The maximum number of tag values returned per search" )
maxMetricsPerSearch = flag . Int ( "search.maxUniqueTimeseries" , 300e3 , "The maximum number of unique time series each search can scan" )
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precisionBits = flag . Int ( "precisionBits" , 64 , "The number of precision bits to store per each value. Lower precision bits improves data compression at the cost of precision loss" )
disableRPCCompression = flag . Bool ( ` rpc.disableCompression ` , false , "Disable compression of RPC traffic. This reduces CPU usage at the cost of higher network bandwidth usage" )
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)
// Server processes connections from vminsert and vmselect.
type Server struct {
storage * storage . Storage
vminsertLN net . Listener
vmselectLN net . Listener
vminsertWG sync . WaitGroup
vmselectWG sync . WaitGroup
vminsertConnsMap connsMap
vmselectConnsMap connsMap
stopFlag uint64
}
type connsMap struct {
mu sync . Mutex
m map [ net . Conn ] struct { }
}
func ( cm * connsMap ) Init ( ) {
cm . m = make ( map [ net . Conn ] struct { } )
}
func ( cm * connsMap ) Add ( c net . Conn ) {
cm . mu . Lock ( )
cm . m [ c ] = struct { } { }
cm . mu . Unlock ( )
}
func ( cm * connsMap ) Delete ( c net . Conn ) {
cm . mu . Lock ( )
delete ( cm . m , c )
cm . mu . Unlock ( )
}
func ( cm * connsMap ) CloseAll ( ) {
cm . mu . Lock ( )
for c := range cm . m {
_ = c . Close ( )
}
cm . mu . Unlock ( )
}
// NewServer returns new Server.
func NewServer ( vminsertAddr , vmselectAddr string , storage * storage . Storage ) ( * Server , error ) {
vminsertLN , err := netutil . NewTCPListener ( "vminsert" , vminsertAddr )
if err != nil {
return nil , fmt . Errorf ( "unable to listen vminsertAddr %s: %s" , vminsertAddr , err )
}
vmselectLN , err := netutil . NewTCPListener ( "vmselect" , vmselectAddr )
if err != nil {
return nil , fmt . Errorf ( "unable to listen vmselectAddr %s: %s" , vmselectAddr , err )
}
if err := encoding . CheckPrecisionBits ( uint8 ( * precisionBits ) ) ; err != nil {
return nil , fmt . Errorf ( "invalid -precisionBits: %s" , err )
}
// Set network-level write timeouts to reasonable values in order to protect
// from broken networks.
// Do not set read timeouts, since they are managed separately -
// search for SetReadDeadline in this file.
vminsertLN . WriteTimeout = time . Minute
vmselectLN . WriteTimeout = time . Minute
s := & Server {
storage : storage ,
vminsertLN : vminsertLN ,
vmselectLN : vmselectLN ,
}
s . vminsertConnsMap . Init ( )
s . vmselectConnsMap . Init ( )
return s , nil
}
// RunVMInsert runs a server accepting connections from vminsert.
func ( s * Server ) RunVMInsert ( ) {
logger . Infof ( "accepting vminsert conns at %s" , s . vminsertLN . Addr ( ) )
for {
c , err := s . vminsertLN . Accept ( )
if err != nil {
if pe , ok := err . ( net . Error ) ; ok && pe . Temporary ( ) {
continue
}
if s . isStopping ( ) {
return
}
logger . Panicf ( "FATAL: cannot process vminsert conns at %s: %s" , s . vminsertLN . Addr ( ) , err )
}
logger . Infof ( "accepted vminsert conn from %s" , c . RemoteAddr ( ) )
vminsertConns . Inc ( )
s . vminsertConnsMap . Add ( c )
s . vminsertWG . Add ( 1 )
go func ( ) {
defer func ( ) {
s . vminsertConnsMap . Delete ( c )
vminsertConns . Dec ( )
s . vminsertWG . Done ( )
} ( )
// There is no need in response compression, since
// vmstorage doesn't send anything back to vminsert.
compressionLevel := 0
bc , err := handshake . VMInsertServer ( c , compressionLevel )
if err != nil {
if s . isStopping ( ) {
// c is stopped inside Server.MustClose
return
}
logger . Errorf ( "cannot perform vminsert handshake with client %q: %s" , c . RemoteAddr ( ) , err )
_ = c . Close ( )
return
}
defer func ( ) {
if ! s . isStopping ( ) {
logger . Infof ( "closing vminsert conn from %s" , c . RemoteAddr ( ) )
}
_ = bc . Close ( )
} ( )
logger . Infof ( "processing vminsert conn from %s" , c . RemoteAddr ( ) )
if err := s . processVMInsertConn ( bc ) ; err != nil {
if s . isStopping ( ) {
return
}
vminsertConnErrors . Inc ( )
logger . Errorf ( "cannot process vminsert conn from %s: %s" , c . RemoteAddr ( ) , err )
}
} ( )
}
}
var (
vminsertConns = metrics . NewCounter ( "vm_vminsert_conns" )
vminsertConnErrors = metrics . NewCounter ( "vm_vminsert_conn_errors_total" )
)
// RunVMSelect runs a server accepting connections from vmselect.
func ( s * Server ) RunVMSelect ( ) {
logger . Infof ( "accepting vmselect conns at %s" , s . vmselectLN . Addr ( ) )
for {
c , err := s . vmselectLN . Accept ( )
if err != nil {
if pe , ok := err . ( net . Error ) ; ok && pe . Temporary ( ) {
continue
}
if s . isStopping ( ) {
return
}
logger . Panicf ( "FATAL: cannot process vmselect conns at %s: %s" , s . vmselectLN . Addr ( ) , err )
}
logger . Infof ( "accepted vmselect conn from %s" , c . RemoteAddr ( ) )
vmselectConns . Inc ( )
s . vmselectConnsMap . Add ( c )
s . vmselectWG . Add ( 1 )
go func ( ) {
defer func ( ) {
s . vmselectConnsMap . Delete ( c )
vmselectConns . Dec ( )
s . vmselectWG . Done ( )
} ( )
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// Compress responses to vmselect even if they already contain compressed blocks.
// Responses contain uncompressed metric names, which should compress well
// when the response contains high number of time series.
// Additionally, recently added metric blocks are usually uncompressed, so the compression
// should save network bandwidth.
compressionLevel := 1
if * disableRPCCompression {
compressionLevel = 0
}
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bc , err := handshake . VMSelectServer ( c , compressionLevel )
if err != nil {
if s . isStopping ( ) {
// c is closed inside Server.MustClose
return
}
logger . Errorf ( "cannot perform vmselect handshake with client %q: %s" , c . RemoteAddr ( ) , err )
_ = c . Close ( )
return
}
defer func ( ) {
if ! s . isStopping ( ) {
logger . Infof ( "closing vmselect conn from %s" , c . RemoteAddr ( ) )
}
_ = bc . Close ( )
} ( )
logger . Infof ( "processing vmselect conn from %s" , c . RemoteAddr ( ) )
if err := s . processVMSelectConn ( bc ) ; err != nil {
if s . isStopping ( ) {
return
}
vmselectConnErrors . Inc ( )
logger . Errorf ( "cannot process vmselect conn %s: %s" , c . RemoteAddr ( ) , err )
}
} ( )
}
}
var (
vmselectConns = metrics . NewCounter ( "vm_vmselect_conns" )
vmselectConnErrors = metrics . NewCounter ( "vm_vmselect_conn_errors_total" )
)
// MustClose gracefully closes the server,
// so it no longer touches s.storage after returning.
func ( s * Server ) MustClose ( ) {
// Mark the server as stoping.
s . setIsStopping ( )
// Stop accepting new connections from vminsert and vmselect.
if err := s . vminsertLN . Close ( ) ; err != nil {
logger . Panicf ( "FATAL: cannot close vminsert listener: %s" , err )
}
if err := s . vmselectLN . Close ( ) ; err != nil {
logger . Panicf ( "FATAL: cannot close vmselect listener: %s" , err )
}
// Close existing connections from vminsert, so the goroutines
// processing these connections are finished.
s . vminsertConnsMap . CloseAll ( )
// Close existing connections from vmselect, so the goroutines
// processing these connections are finished.
s . vmselectConnsMap . CloseAll ( )
// Wait until all the goroutines processing vminsert and vmselect conns
// are finished.
s . vminsertWG . Wait ( )
s . vmselectWG . Wait ( )
}
func ( s * Server ) setIsStopping ( ) {
atomic . StoreUint64 ( & s . stopFlag , 1 )
}
func ( s * Server ) isStopping ( ) bool {
return atomic . LoadUint64 ( & s . stopFlag ) != 0
}
func ( s * Server ) processVMInsertConn ( r io . Reader ) error {
sizeBuf := make ( [ ] byte , 8 )
var buf [ ] byte
var mrs [ ] storage . MetricRow
for {
if _ , err := io . ReadFull ( r , sizeBuf ) ; err != nil {
if err == io . EOF {
// Remote end gracefully closed the connection.
return nil
}
return fmt . Errorf ( "cannot read packet size: %s" , err )
}
packetSize := encoding . UnmarshalUint64 ( sizeBuf )
if packetSize > consts . MaxInsertPacketSize {
return fmt . Errorf ( "too big packet size: %d; shouldn't exceed %d" , packetSize , consts . MaxInsertPacketSize )
}
buf = bytesutil . Resize ( buf , int ( packetSize ) )
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if n , err := io . ReadFull ( r , buf ) ; err != nil {
return fmt . Errorf ( "cannot read packet with size %d: %s; read only %d bytes" , packetSize , err , n )
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}
vminsertPacketsRead . Inc ( )
// Read metric rows from the packet.
mrs = mrs [ : 0 ]
tail := buf
for len ( tail ) > 0 {
if len ( mrs ) < cap ( mrs ) {
mrs = mrs [ : len ( mrs ) + 1 ]
} else {
mrs = append ( mrs , storage . MetricRow { } )
}
mr := & mrs [ len ( mrs ) - 1 ]
var err error
tail , err = mr . Unmarshal ( tail )
if err != nil {
return fmt . Errorf ( "cannot unmarshal MetricRow: %s" , err )
}
}
vminsertMetricsRead . Add ( len ( mrs ) )
if err := s . storage . AddRows ( mrs , uint8 ( * precisionBits ) ) ; err != nil {
return fmt . Errorf ( "cannot store metrics: %s" , err )
}
}
}
var (
vminsertPacketsRead = metrics . NewCounter ( "vm_vminsert_packets_read_total" )
vminsertMetricsRead = metrics . NewCounter ( "vm_vminsert_metrics_read_total" )
)
func ( s * Server ) processVMSelectConn ( bc * handshake . BufferedConn ) error {
ctx := & vmselectRequestCtx {
bc : bc ,
sizeBuf : make ( [ ] byte , 8 ) ,
}
for {
err := s . processVMSelectRequest ( ctx )
n := atomic . LoadUint64 ( & ctx . sr . MissingMetricNamesForMetricID )
missingMetricNamesForMetricID . Add ( int ( n ) )
if err != nil {
if err == io . EOF {
// Remote client gracefully closed the connection.
return nil
}
return fmt . Errorf ( "cannot process vmselect request: %s" , err )
}
if err := bc . Flush ( ) ; err != nil {
return fmt . Errorf ( "cannot flush compressed buffers: %s" , err )
}
}
}
var missingMetricNamesForMetricID = metrics . NewCounter ( ` vm_missing_metric_names_for_metric_id_total ` )
type vmselectRequestCtx struct {
bc * handshake . BufferedConn
sizeBuf [ ] byte
dataBuf [ ] byte
sq storage . SearchQuery
tfss [ ] * storage . TagFilters
sr storage . Search
}
func ( ctx * vmselectRequestCtx ) readUint32 ( ) ( uint32 , error ) {
ctx . sizeBuf = bytesutil . Resize ( ctx . sizeBuf , 4 )
if _ , err := io . ReadFull ( ctx . bc , ctx . sizeBuf ) ; err != nil {
if err == io . EOF {
return 0 , err
}
return 0 , fmt . Errorf ( "cannot read uint32: %s" , err )
}
n := encoding . UnmarshalUint32 ( ctx . sizeBuf )
return n , nil
}
func ( ctx * vmselectRequestCtx ) readDataBufBytes ( maxDataSize int ) error {
ctx . sizeBuf = bytesutil . Resize ( ctx . sizeBuf , 8 )
if _ , err := io . ReadFull ( ctx . bc , ctx . sizeBuf ) ; err != nil {
if err == io . EOF {
return err
}
return fmt . Errorf ( "cannot read data size: %s" , err )
}
dataSize := encoding . UnmarshalUint64 ( ctx . sizeBuf )
if dataSize > uint64 ( maxDataSize ) {
return fmt . Errorf ( "too big data size: %d; it mustn't exceed %d bytes" , dataSize , maxDataSize )
}
ctx . dataBuf = bytesutil . Resize ( ctx . dataBuf , int ( dataSize ) )
if dataSize == 0 {
return nil
}
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if n , err := io . ReadFull ( ctx . bc , ctx . dataBuf ) ; err != nil {
return fmt . Errorf ( "cannot read data with size %d: %s; read only %d bytes" , dataSize , err , n )
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}
return nil
}
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func ( ctx * vmselectRequestCtx ) readBool ( ) ( bool , error ) {
ctx . dataBuf = bytesutil . Resize ( ctx . dataBuf , 1 )
if _ , err := io . ReadFull ( ctx . bc , ctx . dataBuf ) ; err != nil {
if err == io . EOF {
return false , err
}
return false , fmt . Errorf ( "cannot read bool: %s" , err )
}
v := ctx . dataBuf [ 0 ] != 0
return v , nil
}
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func ( ctx * vmselectRequestCtx ) writeDataBufBytes ( ) error {
if err := ctx . writeUint64 ( uint64 ( len ( ctx . dataBuf ) ) ) ; err != nil {
return fmt . Errorf ( "cannot write data size: %s" , err )
}
if len ( ctx . dataBuf ) == 0 {
return nil
}
if _ , err := ctx . bc . Write ( ctx . dataBuf ) ; err != nil {
return fmt . Errorf ( "cannot write data with size %d: %s" , len ( ctx . dataBuf ) , err )
}
return nil
}
func ( ctx * vmselectRequestCtx ) writeString ( s string ) error {
ctx . dataBuf = append ( ctx . dataBuf [ : 0 ] , s ... )
return ctx . writeDataBufBytes ( )
}
func ( ctx * vmselectRequestCtx ) writeUint64 ( n uint64 ) error {
ctx . sizeBuf = encoding . MarshalUint64 ( ctx . sizeBuf [ : 0 ] , n )
if _ , err := ctx . bc . Write ( ctx . sizeBuf ) ; err != nil {
return fmt . Errorf ( "cannot write uint64 %d: %s" , n , err )
}
return nil
}
const maxRPCNameSize = 128
var zeroTime time . Time
func ( s * Server ) processVMSelectRequest ( ctx * vmselectRequestCtx ) error {
// Read rpcName
// Do not set deadline on reading rpcName, since it may take a
// lot of time for idle connection.
if err := ctx . readDataBufBytes ( maxRPCNameSize ) ; err != nil {
if err == io . EOF {
// Remote client gracefully closed the connection.
return err
}
return fmt . Errorf ( "cannot read rpcName: %s" , err )
}
// Limit the time required for reading request args.
if err := ctx . bc . SetReadDeadline ( time . Now ( ) . Add ( 5 * time . Second ) ) ; err != nil {
return fmt . Errorf ( "cannot set read deadline for reading request args: %s" , err )
}
defer func ( ) {
_ = ctx . bc . SetReadDeadline ( zeroTime )
} ( )
switch string ( ctx . dataBuf ) {
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case "search_v3" :
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return s . processVMSelectSearchQuery ( ctx )
case "labelValues" :
return s . processVMSelectLabelValues ( ctx )
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case "labelEntries" :
return s . processVMSelectLabelEntries ( ctx )
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case "labels" :
return s . processVMSelectLabels ( ctx )
case "seriesCount" :
return s . processVMSelectSeriesCount ( ctx )
case "deleteMetrics_v2" :
return s . processVMSelectDeleteMetrics ( ctx )
default :
return fmt . Errorf ( "unsupported rpcName: %q" , ctx . dataBuf )
}
}
const maxTagFiltersSize = 64 * 1024
func ( s * Server ) processVMSelectDeleteMetrics ( ctx * vmselectRequestCtx ) error {
vmselectDeleteMetricsRequests . Inc ( )
// Read request
if err := ctx . readDataBufBytes ( maxTagFiltersSize ) ; err != nil {
return fmt . Errorf ( "cannot read labelName: %s" , err )
}
tail , err := ctx . sq . Unmarshal ( ctx . dataBuf )
if err != nil {
return fmt . Errorf ( "cannot unmarshal SearchQuery: %s" , err )
}
if len ( tail ) > 0 {
return fmt . Errorf ( "unexpected non-zero tail left after unmarshaling SearchQuery: (len=%d) %q" , len ( tail ) , tail )
}
// Setup ctx.tfss
if err := ctx . setupTfss ( ) ; err != nil {
// Send the error message to vmselect.
errMsg := err . Error ( )
if err := ctx . writeString ( errMsg ) ; err != nil {
return fmt . Errorf ( "cannot send error message: %s" , err )
}
return nil
}
// Delete the given metrics.
deletedCount , err := s . storage . DeleteMetrics ( ctx . tfss )
if err != nil {
if err := ctx . writeString ( err . Error ( ) ) ; err != nil {
return fmt . Errorf ( "cannot send error message: %s" , err )
}
return nil
}
// Send an empty error message to vmselect.
if err := ctx . writeString ( "" ) ; err != nil {
return fmt . Errorf ( "cannot send empty error message: %s" , err )
}
// Send deletedCount to vmselect.
if err := ctx . writeUint64 ( uint64 ( deletedCount ) ) ; err != nil {
return fmt . Errorf ( "cannot send deletedCount=%d: %s" , deletedCount , err )
}
return nil
}
func ( s * Server ) processVMSelectLabels ( ctx * vmselectRequestCtx ) error {
vmselectLabelsRequests . Inc ( )
// Read request
accountID , err := ctx . readUint32 ( )
if err != nil {
return fmt . Errorf ( "cannot read accountID: %s" , err )
}
projectID , err := ctx . readUint32 ( )
if err != nil {
return fmt . Errorf ( "cannot read projectID: %s" , err )
}
// Search for tag keys
labels , err := s . storage . SearchTagKeys ( accountID , projectID , * maxTagKeysPerSearch )
if err != nil {
// Send the error message to vmselect.
errMsg := fmt . Sprintf ( "error during labels search: %s" , err )
if err := ctx . writeString ( errMsg ) ; err != nil {
return fmt . Errorf ( "cannot send error message: %s" , err )
}
return nil
}
// Send an empty error message to vmselect.
if err := ctx . writeString ( "" ) ; err != nil {
return fmt . Errorf ( "cannot send empty error message: %s" , err )
}
// Send labels to vmselect
for _ , label := range labels {
if len ( label ) == 0 {
// Do this substitution in order to prevent clashing with 'end of response' marker.
label = "__name__"
}
if err := ctx . writeString ( label ) ; err != nil {
return fmt . Errorf ( "cannot write label %q: %s" , label , err )
}
}
// Send 'end of response' marker
if err := ctx . writeString ( "" ) ; err != nil {
return fmt . Errorf ( "cannot send 'end of response' marker" )
}
return nil
}
const maxLabelValueSize = 16 * 1024
func ( s * Server ) processVMSelectLabelValues ( ctx * vmselectRequestCtx ) error {
vmselectLabelValuesRequests . Inc ( )
// Read request
accountID , err := ctx . readUint32 ( )
if err != nil {
return fmt . Errorf ( "cannot read accountID: %s" , err )
}
projectID , err := ctx . readUint32 ( )
if err != nil {
return fmt . Errorf ( "cannot read projectID: %s" , err )
}
if err := ctx . readDataBufBytes ( maxLabelValueSize ) ; err != nil {
return fmt . Errorf ( "cannot read labelName: %s" , err )
}
labelName := ctx . dataBuf
// Search for tag values
labelValues , err := s . storage . SearchTagValues ( accountID , projectID , labelName , * maxTagValuesPerSearch )
if err != nil {
// Send the error message to vmselect.
errMsg := fmt . Sprintf ( "error during label values search for labelName=%q: %s" , labelName , err )
if err := ctx . writeString ( errMsg ) ; err != nil {
return fmt . Errorf ( "cannot send error message: %s" , err )
}
return nil
}
// Send an empty error message to vmselect.
if err := ctx . writeString ( "" ) ; err != nil {
return fmt . Errorf ( "cannot send empty error message: %s" , err )
}
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return writeLabelValues ( ctx , labelValues )
}
func writeLabelValues ( ctx * vmselectRequestCtx , labelValues [ ] string ) error {
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for _ , labelValue := range labelValues {
if len ( labelValue ) == 0 {
// Skip empty label values, since they have no sense for prometheus.
continue
}
if err := ctx . writeString ( labelValue ) ; err != nil {
return fmt . Errorf ( "cannot write labelValue %q: %s" , labelValue , err )
}
}
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// Send 'end of label values' marker
if err := ctx . writeString ( "" ) ; err != nil {
return fmt . Errorf ( "cannot send 'end of response' marker" )
}
return nil
}
func ( s * Server ) processVMSelectLabelEntries ( ctx * vmselectRequestCtx ) error {
vmselectLabelEntriesRequests . Inc ( )
// Read request
accountID , err := ctx . readUint32 ( )
if err != nil {
return fmt . Errorf ( "cannot read accountID: %s" , err )
}
projectID , err := ctx . readUint32 ( )
if err != nil {
return fmt . Errorf ( "cannot read projectID: %s" , err )
}
// Perform the request
labelEntries , err := s . storage . SearchTagEntries ( accountID , projectID , * maxTagKeysPerSearch , * maxTagValuesPerSearch )
if err != nil {
// Send the error message to vmselect.
errMsg := fmt . Sprintf ( "error during label entries search: %s" , err )
if err := ctx . writeString ( errMsg ) ; err != nil {
return fmt . Errorf ( "cannot send error message: %s" , err )
}
return nil
}
// Send an empty error message to vmselect.
if err := ctx . writeString ( "" ) ; err != nil {
return fmt . Errorf ( "cannot send empty error message: %s" , err )
}
// Send labelEntries to vmselect
for i := range labelEntries {
e := & labelEntries [ i ]
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label := e . Key
if label == "" {
// Do this substitution in order to prevent clashing with 'end of response' marker.
label = "__name__"
}
if err := ctx . writeString ( label ) ; err != nil {
return fmt . Errorf ( "cannot write label %q: %s" , label , err )
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}
if err := writeLabelValues ( ctx , e . Values ) ; err != nil {
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return fmt . Errorf ( "cannot write label values for %q: %s" , label , err )
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}
}
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// Send 'end of response' marker
if err := ctx . writeString ( "" ) ; err != nil {
return fmt . Errorf ( "cannot send 'end of response' marker" )
}
return nil
}
func ( s * Server ) processVMSelectSeriesCount ( ctx * vmselectRequestCtx ) error {
vmselectSeriesCountRequests . Inc ( )
// Read request
accountID , err := ctx . readUint32 ( )
if err != nil {
return fmt . Errorf ( "cannot read accountID: %s" , err )
}
projectID , err := ctx . readUint32 ( )
if err != nil {
return fmt . Errorf ( "cannot read projectID: %s" , err )
}
// Execute the request
n , err := s . storage . GetSeriesCount ( accountID , projectID )
if err != nil {
// Send the error message to vmselect.
errMsg := fmt . Sprintf ( "error during obtaining series count: %s" , err )
if err := ctx . writeString ( errMsg ) ; err != nil {
return fmt . Errorf ( "cannot send error message: %s" , err )
}
return nil
}
// Send an empty error message to vmselect.
if err := ctx . writeString ( "" ) ; err != nil {
return fmt . Errorf ( "cannot send empty error message: %s" , err )
}
// Send series count to vmselect.
if err := ctx . writeUint64 ( n ) ; err != nil {
return fmt . Errorf ( "cannot write series count to vmselect: %s" , err )
}
return nil
}
// maxSearchQuerySize is the maximum size of SearchQuery packet in bytes.
const maxSearchQuerySize = 1024 * 1024
func ( s * Server ) processVMSelectSearchQuery ( ctx * vmselectRequestCtx ) error {
vmselectSearchQueryRequests . Inc ( )
// Read search query.
if err := ctx . readDataBufBytes ( maxSearchQuerySize ) ; err != nil {
return fmt . Errorf ( "cannot read searchQuery: %s" , err )
}
tail , err := ctx . sq . Unmarshal ( ctx . dataBuf )
if err != nil {
return fmt . Errorf ( "cannot unmarshal SearchQuery: %s" , err )
}
if len ( tail ) > 0 {
return fmt . Errorf ( "unexpected non-zero tail left after unmarshaling SearchQuery: (len=%d) %q" , len ( tail ) , tail )
}
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fetchData , err := ctx . readBool ( )
if err != nil {
return fmt . Errorf ( "cannot read `fetchData` bool: %s" , err )
}
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// Setup search.
if err := ctx . setupTfss ( ) ; err != nil {
// Send the error message to vmselect.
errMsg := err . Error ( )
if err := ctx . writeString ( errMsg ) ; err != nil {
return fmt . Errorf ( "cannot send error message: %s" , err )
}
return nil
}
tr := storage . TimeRange {
MinTimestamp : ctx . sq . MinTimestamp ,
MaxTimestamp : ctx . sq . MaxTimestamp ,
}
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ctx . sr . Init ( s . storage , ctx . tfss , tr , fetchData , * maxMetricsPerSearch )
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defer ctx . sr . MustClose ( )
if err := ctx . sr . Error ( ) ; err != nil {
// Send the error message to vmselect.
errMsg := fmt . Sprintf ( "search error: %s" , err )
if err := ctx . writeString ( errMsg ) ; err != nil {
return fmt . Errorf ( "cannot send error message: %s" , err )
}
return nil
}
// Send empty error message to vmselect.
if err := ctx . writeString ( "" ) ; err != nil {
return fmt . Errorf ( "cannot send empty error message: %s" , err )
}
// Send found blocks to vmselect.
for ctx . sr . NextMetricBlock ( ) {
mb := ctx . sr . MetricBlock
vmselectMetricBlocksRead . Inc ( )
vmselectMetricRowsRead . Add ( mb . Block . RowsCount ( ) )
ctx . dataBuf = mb . Marshal ( ctx . dataBuf [ : 0 ] )
if err := ctx . writeDataBufBytes ( ) ; err != nil {
return fmt . Errorf ( "cannot send MetricBlock: %s" , err )
}
}
if err := ctx . sr . Error ( ) ; err != nil {
return fmt . Errorf ( "search error: %s" , err )
}
// Send 'end of response' marker
if err := ctx . writeString ( "" ) ; err != nil {
return fmt . Errorf ( "cannot send 'end of response' marker" )
}
return nil
}
var (
vmselectDeleteMetricsRequests = metrics . NewCounter ( "vm_vmselect_delete_metrics_requests_total" )
vmselectLabelsRequests = metrics . NewCounter ( "vm_vmselect_labels_requests_total" )
vmselectLabelValuesRequests = metrics . NewCounter ( "vm_vmselect_label_values_requests_total" )
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vmselectLabelEntriesRequests = metrics . NewCounter ( "vm_vmselect_label_entries_requests_total" )
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vmselectSeriesCountRequests = metrics . NewCounter ( "vm_vmselect_series_count_requests_total" )
vmselectSearchQueryRequests = metrics . NewCounter ( "vm_vmselect_search_query_requests_total" )
vmselectMetricBlocksRead = metrics . NewCounter ( "vm_vmselect_metric_blocks_read_total" )
vmselectMetricRowsRead = metrics . NewCounter ( "vm_vmselect_metric_rows_read_total" )
)
func ( ctx * vmselectRequestCtx ) setupTfss ( ) error {
tfss := ctx . tfss [ : 0 ]
for _ , tagFilters := range ctx . sq . TagFilterss {
if len ( tfss ) < cap ( tfss ) {
tfss = tfss [ : len ( tfss ) + 1 ]
} else {
tfss = append ( tfss , & storage . TagFilters { } )
}
tfs := tfss [ len ( tfss ) - 1 ]
tfs . Reset ( ctx . sq . AccountID , ctx . sq . ProjectID )
for i := range tagFilters {
tf := & tagFilters [ i ]
if err := tfs . Add ( tf . Key , tf . Value , tf . IsNegative , tf . IsRegexp ) ; err != nil {
return fmt . Errorf ( "cannot parse tag filter %s: %s" , tf , err )
}
}
}
ctx . tfss = tfss
return nil
}