mirror of
https://github.com/prometheus/prometheus.git
synced 2024-09-22 00:37:37 -07:00
0f191629c6
This is now not even trying to throttle in a benign way, but creates a fully-fledged error. Advantage: It shows up very visible on the status page. Disadvantage: The server does not really adjusts to a lower scraping rate. However, if your ingestion backs up, you are in a very irregulare state, I'd say it _should_ be considered an error and not dealt with in a more graceful way. In different news: I'll work on optimizing ingestion so that we will not as easily run into that situation in the first place.
60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
// Copyright 2013 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 retrieval
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/prometheus/client_golang/extraction"
|
|
|
|
clientmodel "github.com/prometheus/client_golang/model"
|
|
)
|
|
|
|
var errIngestChannelFull = errors.New("ingestion channel full")
|
|
|
|
// MergeLabelsIngester merges a labelset ontop of a given extraction result and
|
|
// passes the result on to another ingester. Label collisions are avoided by
|
|
// appending a label prefix to any newly merged colliding labels.
|
|
type MergeLabelsIngester struct {
|
|
Labels clientmodel.LabelSet
|
|
CollisionPrefix clientmodel.LabelName
|
|
|
|
Ingester extraction.Ingester
|
|
}
|
|
|
|
// Ingest ingests the provided extraction result by merging in i.Labels and then
|
|
// handing it over to i.Ingester.
|
|
func (i *MergeLabelsIngester) Ingest(samples clientmodel.Samples) error {
|
|
for _, s := range samples {
|
|
s.Metric.MergeFromLabelSet(i.Labels, i.CollisionPrefix)
|
|
}
|
|
|
|
return i.Ingester.Ingest(samples)
|
|
}
|
|
|
|
// ChannelIngester feeds results into a channel without modifying them.
|
|
type ChannelIngester chan<- clientmodel.Samples
|
|
|
|
// Ingest ingests the provided extraction result by sending it to its channel.
|
|
// It returns an error if the channel is not ready to receive. This is important
|
|
// to fail fast and to not pile up ingestion requests in case of overload.
|
|
func (i ChannelIngester) Ingest(s clientmodel.Samples) error {
|
|
select {
|
|
case i <- s:
|
|
return nil
|
|
default:
|
|
return errIngestChannelFull
|
|
}
|
|
}
|