mirror of https://github.com/prometheus/prometheus
102 lines
2.4 KiB
Go
102 lines
2.4 KiB
Go
// Copyright 2016 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 remote
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"net/http"
|
|
"time"
|
|
|
|
"github.com/golang/protobuf/proto"
|
|
"github.com/golang/snappy"
|
|
"github.com/prometheus/common/model"
|
|
)
|
|
|
|
// Client allows sending batches of Prometheus samples to an HTTP endpoint.
|
|
type Client struct {
|
|
url string
|
|
client http.Client
|
|
}
|
|
|
|
// NewClient creates a new Client.
|
|
func NewClient(url string, timeout time.Duration) (*Client, error) {
|
|
return &Client{
|
|
url: url,
|
|
client: http.Client{
|
|
Timeout: timeout,
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
// Store sends a batch of samples to the HTTP endpoint.
|
|
func (c *Client) Store(samples model.Samples) error {
|
|
req := &WriteRequest{
|
|
Timeseries: make([]*TimeSeries, 0, len(samples)),
|
|
}
|
|
for _, s := range samples {
|
|
ts := &TimeSeries{
|
|
Labels: make([]*LabelPair, 0, len(s.Metric)),
|
|
}
|
|
for k, v := range s.Metric {
|
|
ts.Labels = append(ts.Labels,
|
|
&LabelPair{
|
|
Name: string(k),
|
|
Value: string(v),
|
|
})
|
|
}
|
|
ts.Samples = []*Sample{
|
|
{
|
|
Value: float64(s.Value),
|
|
TimestampMs: int64(s.Timestamp),
|
|
},
|
|
}
|
|
req.Timeseries = append(req.Timeseries, ts)
|
|
}
|
|
|
|
data, err := proto.Marshal(req)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
buf := bytes.Buffer{}
|
|
if _, err := snappy.NewWriter(&buf).Write(data); err != nil {
|
|
return err
|
|
}
|
|
|
|
httpReq, err := http.NewRequest("POST", c.url, &buf)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
httpReq.Header.Add("Content-Encoding", "snappy")
|
|
httpResp, err := c.client.Do(httpReq)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer httpResp.Body.Close()
|
|
if httpResp.StatusCode/100 != 2 {
|
|
return fmt.Errorf("server returned HTTP status %s", httpResp.Status)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Name identifies the client as a generic client.
|
|
//
|
|
// TODO: This client is going to be the only one soon - then this method
|
|
// will simply be removed in the restructuring and the whole "generic" naming
|
|
// will be gone for good.
|
|
func (c Client) Name() string {
|
|
return "generic"
|
|
}
|