mirror of
https://github.com/prometheus/prometheus
synced 2024-12-28 09:42:22 +00:00
77605649a9
Switch back to a single remote writer, as we were only ever meant to have one and the relabel semantics are clearer that way.
121 lines
3.0 KiB
Go
121 lines
3.0 KiB
Go
// Copyright 2016 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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"bytes"
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"fmt"
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"net/http"
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"time"
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"github.com/golang/protobuf/proto"
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"github.com/golang/snappy"
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"golang.org/x/net/context"
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"golang.org/x/net/context/ctxhttp"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/util/httputil"
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)
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// Client allows sending batches of Prometheus samples to an HTTP endpoint.
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type Client struct {
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url config.URL
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client *http.Client
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timeout time.Duration
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}
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// NewClient creates a new Client.
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func NewClient(conf config.RemoteWriteConfig) (*Client, error) {
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tlsConfig, err := httputil.NewTLSConfig(conf.TLSConfig)
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if err != nil {
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return nil, err
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}
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// The only timeout we care about is the configured push timeout.
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// It is applied on request. So we leave out any timings here.
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var rt http.RoundTripper = &http.Transport{
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Proxy: http.ProxyURL(conf.ProxyURL.URL),
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TLSClientConfig: tlsConfig,
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}
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if conf.BasicAuth != nil {
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rt = httputil.NewBasicAuthRoundTripper(conf.BasicAuth.Username, conf.BasicAuth.Password, rt)
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}
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return &Client{
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url: *conf.URL,
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client: httputil.NewClient(rt),
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timeout: time.Duration(conf.RemoteTimeout),
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}, nil
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}
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// Store sends a batch of samples to the HTTP endpoint.
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func (c *Client) Store(samples model.Samples) error {
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req := &WriteRequest{
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Timeseries: make([]*TimeSeries, 0, len(samples)),
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}
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for _, s := range samples {
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ts := &TimeSeries{
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Labels: make([]*LabelPair, 0, len(s.Metric)),
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}
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for k, v := range s.Metric {
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ts.Labels = append(ts.Labels,
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&LabelPair{
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Name: string(k),
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Value: string(v),
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})
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}
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ts.Samples = []*Sample{
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{
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Value: float64(s.Value),
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TimestampMs: int64(s.Timestamp),
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},
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}
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req.Timeseries = append(req.Timeseries, ts)
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}
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data, err := proto.Marshal(req)
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if err != nil {
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return err
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}
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buf := bytes.Buffer{}
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if _, err := snappy.NewWriter(&buf).Write(data); err != nil {
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return err
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}
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httpReq, err := http.NewRequest("POST", c.url.String(), &buf)
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if err != nil {
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return err
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}
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httpReq.Header.Add("Content-Encoding", "snappy")
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ctx, _ := context.WithTimeout(context.Background(), c.timeout)
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httpResp, err := ctxhttp.Do(ctx, c.client, httpReq)
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if err != nil {
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return err
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}
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defer httpResp.Body.Close()
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if httpResp.StatusCode/100 != 2 {
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return fmt.Errorf("server returned HTTP status %s", httpResp.Status)
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}
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return nil
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}
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// Name identifies the client as a generic client.
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func (c Client) Name() string {
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return "generic"
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}
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