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8ebeed0b44
The Client type is already exposed, but can't be used without the config for it also being exposed. Using the remote.Client from other programs is useful to do full end-to-end tests of Prometheus's remote protocol against adapter implementations.
90 lines
2.2 KiB
Go
90 lines
2.2 KiB
Go
// Copyright 2017 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 remote
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import (
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"sync"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/config"
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)
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// Writer allows queueing samples for remote writes.
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type Writer struct {
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mtx sync.RWMutex
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queues []*QueueManager
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}
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// ApplyConfig updates the state as the new config requires.
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func (w *Writer) ApplyConfig(conf *config.Config) error {
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w.mtx.Lock()
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defer w.mtx.Unlock()
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newQueues := []*QueueManager{}
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// TODO: we should only stop & recreate queues which have changes,
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// as this can be quite disruptive.
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for i, rwConf := range conf.RemoteWriteConfigs {
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c, err := NewClient(i, &ClientConfig{
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URL: rwConf.URL,
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Timeout: rwConf.RemoteTimeout,
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HTTPClientConfig: rwConf.HTTPClientConfig,
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})
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if err != nil {
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return err
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}
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newQueues = append(newQueues, NewQueueManager(
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rwConf.QueueConfig,
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conf.GlobalConfig.ExternalLabels,
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rwConf.WriteRelabelConfigs,
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c,
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))
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}
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for _, q := range w.queues {
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q.Stop()
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}
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w.queues = newQueues
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for _, q := range w.queues {
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q.Start()
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}
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return nil
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}
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// Stop the background processing of the storage queues.
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func (w *Writer) Stop() {
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for _, q := range w.queues {
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q.Stop()
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}
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}
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// Append implements storage.SampleAppender. Always returns nil.
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func (w *Writer) Append(smpl *model.Sample) error {
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w.mtx.RLock()
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defer w.mtx.RUnlock()
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for _, q := range w.queues {
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q.Append(smpl)
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}
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return nil
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}
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// NeedsThrottling implements storage.SampleAppender. It will always return
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// false as a remote storage drops samples on the floor if backlogging instead
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// of asking for throttling.
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func (w *Writer) NeedsThrottling() bool {
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return false
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}
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