mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-13 13:11:37 +01:00
184 lines
5.4 KiB
Go
184 lines
5.4 KiB
Go
package netstorage
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import (
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"fmt"
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"net/http"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/relabel"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/auth"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/encoding"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompb"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
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xxhash "github.com/cespare/xxhash/v2"
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)
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// InsertCtx is a generic context for inserting data.
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//
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// InsertCtx.Reset must be called before the first usage.
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type InsertCtx struct {
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Labels sortedLabels
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MetricNameBuf []byte
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bufRowss []bufRows
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labelsBuf []byte
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relabelCtx relabel.Ctx
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}
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type bufRows struct {
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buf []byte
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rows int
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}
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func (br *bufRows) reset() {
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br.buf = br.buf[:0]
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br.rows = 0
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}
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func (br *bufRows) pushTo(sn *storageNode) error {
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bufLen := len(br.buf)
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err := sn.push(br.buf, br.rows)
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br.reset()
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if err != nil {
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return &httpserver.ErrorWithStatusCode{
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Err: fmt.Errorf("cannot send %d bytes to storageNode %q: %w", bufLen, sn.dialer.Addr(), err),
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StatusCode: http.StatusServiceUnavailable,
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}
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}
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return nil
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}
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// Reset resets ctx.
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func (ctx *InsertCtx) Reset() {
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for i := range ctx.Labels {
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label := &ctx.Labels[i]
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label.Name = nil
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label.Value = nil
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}
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ctx.Labels = ctx.Labels[:0]
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ctx.MetricNameBuf = ctx.MetricNameBuf[:0]
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if ctx.bufRowss == nil {
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ctx.bufRowss = make([]bufRows, len(storageNodes))
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}
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for i := range ctx.bufRowss {
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ctx.bufRowss[i].reset()
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}
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ctx.labelsBuf = ctx.labelsBuf[:0]
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ctx.relabelCtx.Reset()
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}
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// AddLabelBytes adds (name, value) label to ctx.Labels.
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//
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// name and value must exist until ctx.Labels is used.
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func (ctx *InsertCtx) AddLabelBytes(name, value []byte) {
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if len(value) == 0 {
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// Skip labels without values, since they have no sense.
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// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/600
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// Do not skip labels with empty name, since they are equal to __name__.
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return
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}
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ctx.Labels = append(ctx.Labels, prompb.Label{
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// Do not copy name and value contents for performance reasons.
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// This reduces GC overhead on the number of objects and allocations.
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Name: name,
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Value: value,
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})
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}
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// AddLabel adds (name, value) label to ctx.Labels.
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//
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// name and value must exist until ctx.Labels is used.
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func (ctx *InsertCtx) AddLabel(name, value string) {
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if len(value) == 0 {
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// Skip labels without values, since they have no sense.
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// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/600
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// Do not skip labels with empty name, since they are equal to __name__.
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return
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}
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ctx.Labels = append(ctx.Labels, prompb.Label{
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// Do not copy name and value contents for performance reasons.
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// This reduces GC overhead on the number of objects and allocations.
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Name: bytesutil.ToUnsafeBytes(name),
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Value: bytesutil.ToUnsafeBytes(value),
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})
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}
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// ApplyRelabeling applies relabeling to ctx.Labels.
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func (ctx *InsertCtx) ApplyRelabeling() {
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ctx.Labels = ctx.relabelCtx.ApplyRelabeling(ctx.Labels)
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}
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// WriteDataPoint writes (timestamp, value) data point with the given at and labels to ctx buffer.
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func (ctx *InsertCtx) WriteDataPoint(at *auth.Token, labels []prompb.Label, timestamp int64, value float64) error {
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ctx.MetricNameBuf = storage.MarshalMetricNameRaw(ctx.MetricNameBuf[:0], at.AccountID, at.ProjectID, labels)
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storageNodeIdx := ctx.GetStorageNodeIdx(at, labels)
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return ctx.WriteDataPointExt(at, storageNodeIdx, ctx.MetricNameBuf, timestamp, value)
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}
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// WriteDataPointExt writes the given metricNameRaw with (timestmap, value) to ctx buffer with the given storageNodeIdx.
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func (ctx *InsertCtx) WriteDataPointExt(at *auth.Token, storageNodeIdx int, metricNameRaw []byte, timestamp int64, value float64) error {
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br := &ctx.bufRowss[storageNodeIdx]
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sn := storageNodes[storageNodeIdx]
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bufNew := storage.MarshalMetricRow(br.buf, metricNameRaw, timestamp, value)
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if len(bufNew) >= maxBufSizePerStorageNode {
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// Send buf to storageNode, since it is too big.
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if err := br.pushTo(sn); err != nil {
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return err
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}
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br.buf = storage.MarshalMetricRow(bufNew[:0], metricNameRaw, timestamp, value)
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} else {
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br.buf = bufNew
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}
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br.rows++
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return nil
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}
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// FlushBufs flushes ctx bufs to remote storage nodes.
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func (ctx *InsertCtx) FlushBufs() error {
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var firstErr error
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for i := range ctx.bufRowss {
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br := &ctx.bufRowss[i]
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if len(br.buf) == 0 {
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continue
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}
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if err := br.pushTo(storageNodes[i]); err != nil && firstErr == nil {
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firstErr = err
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}
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}
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return firstErr
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}
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// GetStorageNodeIdx returns storage node index for the given at and labels.
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//
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// The returned index must be passed to WriteDataPoint.
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func (ctx *InsertCtx) GetStorageNodeIdx(at *auth.Token, labels []prompb.Label) int {
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if len(storageNodes) == 1 {
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// Fast path - only a single storage node.
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return 0
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}
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buf := ctx.labelsBuf[:0]
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buf = encoding.MarshalUint32(buf, at.AccountID)
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buf = encoding.MarshalUint32(buf, at.ProjectID)
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for i := range labels {
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label := &labels[i]
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buf = marshalBytesFast(buf, label.Name)
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buf = marshalBytesFast(buf, label.Value)
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}
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h := xxhash.Sum64(buf)
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ctx.labelsBuf = buf
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// Do not exclude unavailable storage nodes in order to properly account for rerouted rows in storageNode.push().
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idx := nodesHash.getNodeIdx(h, nil)
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return idx
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}
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func marshalBytesFast(dst []byte, s []byte) []byte {
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dst = encoding.MarshalUint16(dst, uint16(len(s)))
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dst = append(dst, s...)
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return dst
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}
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