prometheus/storage/remote/influxdb/client.go

110 lines
3.0 KiB
Go

// Copyright 2015 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 influxdb
import (
"math"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/log"
"github.com/prometheus/common/model"
influx "github.com/influxdb/influxdb/client"
)
// Client allows sending batches of Prometheus samples to InfluxDB.
type Client struct {
client *influx.Client
database string
retentionPolicy string
ignoredSamples prometheus.Counter
}
// NewClient creates a new Client.
func NewClient(conf influx.Config, db string, rp string) *Client {
c, err := influx.NewClient(conf)
// Currently influx.NewClient() *should* never return an error.
if err != nil {
log.Fatal(err)
}
return &Client{
client: c,
database: db,
retentionPolicy: rp,
ignoredSamples: prometheus.NewCounter(
prometheus.CounterOpts{
Name: "prometheus_influxdb_ignored_samples_total",
Help: "The total number of samples not sent to InfluxDB due to unsupported float values (Inf, -Inf, NaN).",
},
),
}
}
// tagsFromMetric extracts InfluxDB tags from a Prometheus metric.
func tagsFromMetric(m model.Metric) map[string]string {
tags := make(map[string]string, len(m)-1)
for l, v := range m {
if l != model.MetricNameLabel {
tags[string(l)] = string(v)
}
}
return tags
}
// Store sends a batch of samples to InfluxDB via its HTTP API.
func (c *Client) Store(samples model.Samples) error {
points := make([]influx.Point, 0, len(samples))
for _, s := range samples {
v := float64(s.Value)
if math.IsNaN(v) || math.IsInf(v, 0) {
log.Debugf("cannot send value %f to InfluxDB, skipping sample %#v", v, s)
c.ignoredSamples.Inc()
continue
}
points = append(points, influx.Point{
Measurement: string(s.Metric[model.MetricNameLabel]),
Tags: tagsFromMetric(s.Metric),
Time: s.Timestamp.Time(),
Precision: "ms",
Fields: map[string]interface{}{
"value": v,
},
})
}
bps := influx.BatchPoints{
Points: points,
Database: c.database,
RetentionPolicy: c.retentionPolicy,
}
_, err := c.client.Write(bps)
return err
}
// Name identifies the client as an InfluxDB client.
func (c Client) Name() string {
return "influxdb"
}
// Describe implements prometheus.Collector.
func (c *Client) Describe(ch chan<- *prometheus.Desc) {
ch <- c.ignoredSamples.Desc()
}
// Collect implements prometheus.Collector.
func (c *Client) Collect(ch chan<- prometheus.Metric) {
ch <- c.ignoredSamples
}