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ruler: add ability to remote_write directly
Add ability to use remote_write directly. This makes the component more general and makes it possible to use it with Thanos. Signed-off-by: Giedrius Statkevičius <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| package ruler | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
|
|
||
| "github.com/cortexproject/cortex/pkg/cortexpb" | ||
| "github.com/klauspost/compress/snappy" | ||
| "github.com/prometheus/prometheus/prompb" | ||
| ) | ||
|
|
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| type RemoteWritePusher struct { | ||
| u string | ||
| headers map[string]string | ||
| } | ||
|
|
||
| func NewRemoteWritePusher(u string, headers map[string]string) *RemoteWritePusher { | ||
| return &RemoteWritePusher{ | ||
| u: u, | ||
| headers: headers, | ||
| } | ||
| } | ||
|
|
||
| var _ Pusher = &RemoteWritePusher{} | ||
|
|
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| func (r *RemoteWritePusher) Push(ctx context.Context, wr *cortexpb.WriteRequest) (*cortexpb.WriteResponse, error) { | ||
| promwr := &prompb.WriteRequest{ | ||
| Timeseries: make([]prompb.TimeSeries, 0, len(wr.Timeseries)), | ||
| Metadata: make([]prompb.MetricMetadata, 0, len(wr.Metadata)), | ||
| } | ||
|
|
||
| for _, ts := range wr.Timeseries { | ||
| promwr.Timeseries = append(promwr.Timeseries, prompb.TimeSeries{ | ||
| Labels: makeLabels(ts.Labels), | ||
| Samples: makeSamples(ts.Samples), | ||
| Exemplars: makeExemplars(ts.Exemplars), | ||
| //Histograms: makeHistograms(ts.Histograms), | ||
| }) | ||
| } | ||
|
|
||
| for _, m := range wr.Metadata { | ||
| promwr.Metadata = append(promwr.Metadata, prompb.MetricMetadata{ | ||
| Type: prompb.MetricMetadata_MetricType(m.Type), | ||
| Unit: m.Unit, | ||
| Help: m.Help, | ||
| MetricFamilyName: m.MetricFamilyName, | ||
| }) | ||
| } | ||
|
|
||
| m, err := promwr.Marshal() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| encoded := snappy.Encode(nil, m) | ||
|
|
||
| req, err := http.NewRequestWithContext(ctx, http.MethodPost, r.u, bytes.NewReader(encoded)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| for k, v := range r.headers { | ||
| req.Header.Set(k, v) | ||
| } | ||
|
|
||
| resp, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if resp.Body != nil { | ||
| io.Copy(io.Discard, resp.Body) | ||
| resp.Body.Close() | ||
| } | ||
|
|
||
| if resp.StatusCode/100 != 2 { | ||
| return nil, fmt.Errorf("got status code: %d", resp.StatusCode) | ||
| } | ||
|
|
||
| return &cortexpb.WriteResponse{}, nil | ||
| } | ||
|
|
||
| func makeLabels(in []cortexpb.LabelAdapter) []prompb.Label { | ||
| out := make([]prompb.Label, 0, len(in)) | ||
| for _, l := range in { | ||
| out = append(out, prompb.Label{Name: l.Name, Value: l.Value}) | ||
| } | ||
| return out | ||
| } | ||
|
|
||
| func makeSamples(in []cortexpb.Sample) []prompb.Sample { | ||
| out := make([]prompb.Sample, 0, len(in)) | ||
| for _, s := range in { | ||
| out = append(out, prompb.Sample{ | ||
| Value: s.Value, | ||
| Timestamp: s.TimestampMs, | ||
| }) | ||
| } | ||
| return out | ||
| } | ||
|
|
||
| func makeExemplars(in []cortexpb.Exemplar) []prompb.Exemplar { | ||
| out := make([]prompb.Exemplar, 0, len(in)) | ||
| for _, e := range in { | ||
| out = append(out, prompb.Exemplar{ | ||
| Labels: makeLabels(e.Labels), | ||
| Value: e.Value, | ||
| Timestamp: e.TimestampMs, | ||
| }) | ||
| } | ||
| return out | ||
| } | ||
|
|
||
| /* | ||
| func makeHistograms(in []cortexpb.Histogram) []prompb.Histogram { | ||
| out := make([]prompb.Histogram, 0, len(in)) | ||
| for _, h := range in { | ||
| out = append(out, cortexpb.HistogramPromProtoToHistogramProto(h)) | ||
| } | ||
| return out | ||
| } | ||
| */ |
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