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ce97cdd477
* Move remote read handler to remote package. This follows the pattern I started with the remote write handler. The api/v1 package is getting pretty cluttered. Moving code to other packages helps reduce this size and also makes it reusable - eg Cortex doesn't do streaming remote writes yet, and will very soon. Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com> * Deal with a nil remoteReadHandler for tests. Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com> * Remove the global metrics. Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com> * Fix test. Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com> * Review feedback. Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
// Copyright 2021 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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"context"
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"net/http"
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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/prometheus/prometheus/prompb"
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"github.com/prometheus/prometheus/storage"
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)
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type writeHandler struct {
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logger log.Logger
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appendable storage.Appendable
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}
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// NewWriteHandler creates a http.Handler that accepts remote write requests and
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// writes them to the provided appendable.
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func NewWriteHandler(logger log.Logger, appendable storage.Appendable) http.Handler {
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return &writeHandler{
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logger: logger,
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appendable: appendable,
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}
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}
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func (h *writeHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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req, err := DecodeWriteRequest(r.Body)
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if err != nil {
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level.Error(h.logger).Log("msg", "Error decoding remote write request", "err", err.Error())
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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err = h.write(r.Context(), req)
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switch err {
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case nil:
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case storage.ErrOutOfOrderSample, storage.ErrOutOfBounds, storage.ErrDuplicateSampleForTimestamp:
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// Indicated an out of order sample is a bad request to prevent retries.
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level.Error(h.logger).Log("msg", "Out of order sample from remote write", "err", err.Error())
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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default:
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level.Error(h.logger).Log("msg", "Error appending remote write", "err", err.Error())
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.WriteHeader(http.StatusNoContent)
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}
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func (h *writeHandler) write(ctx context.Context, req *prompb.WriteRequest) (err error) {
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app := h.appendable.Appender(ctx)
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defer func() {
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if err != nil {
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app.Rollback()
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return
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}
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err = app.Commit()
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}()
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for _, ts := range req.Timeseries {
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labels := labelProtosToLabels(ts.Labels)
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for _, s := range ts.Samples {
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_, err = app.Append(0, labels, s.Timestamp, s.Value)
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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