mirror of https://github.com/prometheus/prometheus
Signed-off-by: jessicagreben <jessicagrebens@gmail.com>pull/7675/head
jessicagreben
4 years ago
parent
36ac0b68f1
commit
3ed6457dd4
@ -1,120 +0,0 @@
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// Copyright 2020 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package blocks
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import (
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"github.com/go-kit/kit/log"
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"github.com/oklog/ulid"
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"github.com/pkg/errors"
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"github.com/prometheus/prometheus/pkg/labels"
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"github.com/prometheus/prometheus/storage"
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tsdb_errors "github.com/prometheus/prometheus/tsdb/errors"
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"github.com/prometheus/prometheus/tsdb/index"
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)
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type errAppender struct{ err error }
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func (a errAppender) Add(l labels.Labels, t int64, v float64) (uint64, error) { return 0, a.err }
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func (a errAppender) AddFast(ref uint64, t int64, v float64) error { return a.err }
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func (a errAppender) Commit() error { return a.err }
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func (a errAppender) Rollback() error { return a.err }
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func rangeForTimestamp(t int64, width int64) (maxt int64) {
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return (t/width)*width + width
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}
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type MultiWriter struct {
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blocks map[index.Range]Writer
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activeAppenders map[index.Range]storage.Appender
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logger log.Logger
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dir string
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// TODO(bwplotka): Allow more complex compaction levels.
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sizeMillis int64
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}
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func NewMultiWriter(logger log.Logger, dir string, sizeMillis int64) *MultiWriter {
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return &MultiWriter{
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logger: logger,
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dir: dir,
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sizeMillis: sizeMillis,
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blocks: map[index.Range]Writer{},
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activeAppenders: map[index.Range]storage.Appender{},
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}
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}
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// Appender is not thread-safe. Returned Appender is not thread-save as well.
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// TODO(bwplotka): Consider making it thread safe.
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func (w *MultiWriter) Appender() storage.Appender { return w }
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func (w *MultiWriter) getOrCreate(t int64) storage.Appender {
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maxt := rangeForTimestamp(t, w.sizeMillis)
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hash := index.Range{Start: maxt - w.sizeMillis, End: maxt}
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if a, ok := w.activeAppenders[hash]; ok {
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return a
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}
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nw, err := NewTSDBWriter(w.logger, w.dir)
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if err != nil {
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return errAppender{err: errors.Wrap(err, "new tsdb writer")}
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}
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w.blocks[hash] = nw
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w.activeAppenders[hash] = nw.Appender()
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return w.activeAppenders[hash]
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}
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func (w *MultiWriter) Add(l labels.Labels, t int64, v float64) (uint64, error) {
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return w.getOrCreate(t).Add(l, t, v)
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}
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func (w *MultiWriter) AddFast(ref uint64, t int64, v float64) error {
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return w.getOrCreate(t).AddFast(ref, t, v)
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}
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func (w *MultiWriter) Commit() error {
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var merr tsdb_errors.MultiError
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for _, a := range w.activeAppenders {
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merr.Add(a.Commit())
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}
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return merr.Err()
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}
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func (w *MultiWriter) Rollback() error {
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var merr tsdb_errors.MultiError
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for _, a := range w.activeAppenders {
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merr.Add(a.Rollback())
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}
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return merr.Err()
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}
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func (w *MultiWriter) Flush() ([]ulid.ULID, error) {
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ids := make([]ulid.ULID, 0, len(w.blocks))
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for _, b := range w.blocks {
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id, err := b.Flush()
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if err != nil {
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return nil, err
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}
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ids = append(ids, id...)
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}
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return ids, nil
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}
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func (w *MultiWriter) Close() error {
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var merr tsdb_errors.MultiError
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for _, b := range w.blocks {
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merr.Add(b.Close())
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}
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return merr.Err()
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}
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@ -1,139 +0,0 @@
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// Copyright 2020 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package blocks
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import (
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"context"
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"io/ioutil"
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"math"
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"os"
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"time"
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"github.com/oklog/ulid"
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"github.com/prometheus/prometheus/storage"
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"github.com/prometheus/prometheus/tsdb"
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"github.com/go-kit/kit/log"
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"github.com/go-kit/kit/log/level"
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"github.com/pkg/errors"
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"github.com/prometheus/prometheus/pkg/timestamp"
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"github.com/prometheus/prometheus/tsdb/chunkenc"
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)
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// Writer is interface to write time series into Prometheus blocks.
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type Writer interface {
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storage.Appendable
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// Flush writes current data to disk.
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// The block or blocks will contain values accumulated by `Write`.
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Flush() ([]ulid.ULID, error)
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// Close releases all resources. No append is allowed anymore to such writer.
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Close() error
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}
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var _ Writer = &TSDBWriter{}
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// Writer is a block writer that allows appending and flushing to disk.
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type TSDBWriter struct {
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logger log.Logger
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dir string
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head *tsdb.Head
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tmpDir string
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}
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func durToMillis(t time.Duration) int64 {
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return int64(t.Seconds() * 1000)
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}
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// NewTSDBWriter create new block writer.
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//
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// The returned writer accumulates all series in memory until `Flush` is called.
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//
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// Note that the writer will not check if the target directory exists or
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// contains anything at all. It is the caller's responsibility to
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// ensure that the resulting blocks do not overlap etc.
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// Writer ensures the block flush is atomic (via rename).
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func NewTSDBWriter(logger log.Logger, dir string) (*TSDBWriter, error) {
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res := &TSDBWriter{
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logger: logger,
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dir: dir,
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}
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return res, res.initHead()
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}
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// initHead creates and initialises new head.
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func (w *TSDBWriter) initHead() error {
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logger := w.logger
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// Keep Registerer and WAL nil as we don't use them.
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// Put huge chunkRange; It has to be equal then expected block size.
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// Since we don't have info about block size here, set it to large number.
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tmpDir, err := ioutil.TempDir(os.TempDir(), "head")
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if err != nil {
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return errors.Wrap(err, "create temp dir")
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}
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w.tmpDir = tmpDir
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h, err := tsdb.NewHead(nil, logger, nil, durToMillis(9999*time.Hour), w.tmpDir, nil, tsdb.DefaultStripeSize, nil)
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if err != nil {
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return errors.Wrap(err, "tsdb.NewHead")
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}
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w.head = h
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return w.head.Init(math.MinInt64)
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}
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// Appender is not thread-safe. Returned Appender is thread-save however.
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func (w *TSDBWriter) Appender() storage.Appender {
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return w.head.Appender()
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}
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// Flush implements Writer interface. This is where actual block writing
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// happens. After flush completes, no write can be done.
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func (w *TSDBWriter) Flush() ([]ulid.ULID, error) {
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seriesCount := w.head.NumSeries()
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if w.head.NumSeries() == 0 {
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return nil, errors.New("no series appended; aborting.")
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}
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mint := w.head.MinTime()
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maxt := w.head.MaxTime() + 1
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level.Info(w.logger).Log("msg", "flushing", "series_count", seriesCount, "mint", timestamp.Time(mint), "maxt", timestamp.Time(maxt))
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// Flush head to disk as a block.
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compactor, err := tsdb.NewLeveledCompactor(
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context.Background(),
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nil,
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w.logger,
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[]int64{durToMillis(2 * time.Hour)}, // Does not matter, used only for planning.
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chunkenc.NewPool())
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if err != nil {
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return nil, errors.Wrap(err, "create leveled compactor")
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}
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id, err := compactor.Write(w.dir, w.head, mint, maxt, nil)
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if err != nil {
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return nil, errors.Wrap(err, "compactor write")
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}
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// TODO(bwplotka): Potential truncate head, and allow writer reuse. Currently truncating fails with
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// truncate chunks.HeadReadWriter: maxt of the files are not set.
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return []ulid.ULID{id}, nil
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}
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func (w *TSDBWriter) Close() error {
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_ = os.RemoveAll(w.tmpDir)
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return w.head.Close()
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}
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