mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-30 07:59:40 -08:00
103 lines
4.6 KiB
Go
103 lines
4.6 KiB
Go
// Copyright 2014 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// 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 local
|
|
|
|
import (
|
|
"time"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/common/model"
|
|
|
|
"github.com/prometheus/prometheus/storage/metric"
|
|
)
|
|
|
|
// Storage ingests and manages samples, along with various indexes. All methods
|
|
// are goroutine-safe. Storage implements storage.SampleAppender.
|
|
type Storage interface {
|
|
prometheus.Collector
|
|
// Append stores a sample in the Storage. Multiple samples for the same
|
|
// fingerprint need to be submitted in chronological order, from oldest
|
|
// to newest. When Append has returned, the appended sample might not be
|
|
// queryable immediately. (Use WaitForIndexing to wait for complete
|
|
// processing.) The implementation might remove labels with empty value
|
|
// from the provided Sample as those labels are considered equivalent to
|
|
// a label not present at all.
|
|
Append(*model.Sample)
|
|
// NewPreloader returns a new Preloader which allows preloading and pinning
|
|
// series data into memory for use within a query.
|
|
NewPreloader() Preloader
|
|
// MetricsForLabelMatchers returns the metrics from storage that satisfy the given
|
|
// label matchers. At least one label matcher must be specified that does not
|
|
// match the empty string.
|
|
MetricsForLabelMatchers(...*metric.LabelMatcher) map[model.Fingerprint]model.COWMetric
|
|
// LastSamplePairForFingerprint returns the last sample pair for the
|
|
// provided fingerprint. If the respective time series does not exist or
|
|
// has an evicted head chunk, nil is returned.
|
|
LastSamplePairForFingerprint(model.Fingerprint) *model.SamplePair
|
|
// Get all of the label values that are associated with a given label name.
|
|
LabelValuesForLabelName(model.LabelName) model.LabelValues
|
|
// Get the metric associated with the provided fingerprint.
|
|
MetricForFingerprint(model.Fingerprint) model.COWMetric
|
|
// Construct an iterator for a given fingerprint.
|
|
// The iterator will never return samples older than retention time,
|
|
// relative to the time NewIterator was called.
|
|
NewIterator(model.Fingerprint) SeriesIterator
|
|
// Drop all time series associated with the given fingerprints. This operation
|
|
// will not show up in the series operations metrics.
|
|
DropMetricsForFingerprints(...model.Fingerprint)
|
|
// Run the various maintenance loops in goroutines. Returns when the
|
|
// storage is ready to use. Keeps everything running in the background
|
|
// until Stop is called.
|
|
Start() error
|
|
// Stop shuts down the Storage gracefully, flushes all pending
|
|
// operations, stops all maintenance loops,and frees all resources.
|
|
Stop() error
|
|
// WaitForIndexing returns once all samples in the storage are
|
|
// indexed. Indexing is needed for FingerprintsForLabelMatchers and
|
|
// LabelValuesForLabelName and may lag behind.
|
|
WaitForIndexing()
|
|
}
|
|
|
|
// SeriesIterator enables efficient access of sample values in a series. Its
|
|
// methods are not goroutine-safe. A SeriesIterator iterates over a snapshot of
|
|
// a series, i.e. it is safe to continue using a SeriesIterator after or during
|
|
// modifying the corresponding series, but the iterator will represent the state
|
|
// of the series prior the modification.
|
|
type SeriesIterator interface {
|
|
// Gets the two values that are immediately adjacent to a given time. In
|
|
// case a value exist at precisely the given time, only that single
|
|
// value is returned. Only the first or last value is returned (as a
|
|
// single value), if the given time is before or after the first or last
|
|
// value, respectively.
|
|
ValueAtTime(model.Time) []model.SamplePair
|
|
// Gets the boundary values of an interval: the first and last value
|
|
// within a given interval.
|
|
BoundaryValues(metric.Interval) []model.SamplePair
|
|
// Gets all values contained within a given interval.
|
|
RangeValues(metric.Interval) []model.SamplePair
|
|
}
|
|
|
|
// A Preloader preloads series data necessary for a query into memory and pins
|
|
// them until released via Close(). Its methods are generally not
|
|
// goroutine-safe.
|
|
type Preloader interface {
|
|
PreloadRange(
|
|
fp model.Fingerprint,
|
|
from model.Time, through model.Time,
|
|
stalenessDelta time.Duration,
|
|
) error
|
|
// Close unpins any previously requested series data from memory.
|
|
Close()
|
|
}
|