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https://github.com/prometheus/prometheus.git
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eeb1da36ac
Because the InfluxDB client library currently pulls in multiple MBs of unnecessary dependencies, I have modified and cut up the vendored version to only pull in the few pieces that are actually needed. On InfluxDB's side, this dependency issue is tracked in: https://github.com/influxdb/influxdb/issues/3447 Hopefully, it will be resolved soon. If a password is needed for InfluxDB, it may be supplied via the INFLUXDB_PW environment variable.
110 lines
3 KiB
Go
110 lines
3 KiB
Go
// Copyright 2015 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 influxdb
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import (
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"math"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/model"
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"github.com/prometheus/log"
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influx "github.com/influxdb/influxdb/client"
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)
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// Client allows sending batches of Prometheus samples to InfluxDB.
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type Client struct {
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client *influx.Client
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database string
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retentionPolicy string
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ignoredSamples prometheus.Counter
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}
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// NewClient creates a new Client.
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func NewClient(conf influx.Config, db string, rp string) *Client {
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c, err := influx.NewClient(conf)
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// Currently influx.NewClient() *should* never return an error.
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if err != nil {
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log.Fatal(err)
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}
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return &Client{
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client: c,
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database: db,
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retentionPolicy: rp,
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ignoredSamples: prometheus.NewCounter(
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prometheus.CounterOpts{
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Name: "prometheus_influxdb_ignored_samples_total",
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Help: "The total number of samples not sent to InfluxDB due to unsupported float values (Inf, -Inf, NaN).",
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},
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),
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}
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}
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// tagsFromMetric extracts InfluxDB tags from a Prometheus metric.
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func tagsFromMetric(m model.Metric) map[string]string {
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tags := make(map[string]string, len(m)-1)
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for l, v := range m {
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if l != model.MetricNameLabel {
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tags[string(l)] = string(v)
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}
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}
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return tags
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}
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// Store sends a batch of samples to InfluxDB via its HTTP API.
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func (c *Client) Store(samples model.Samples) error {
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points := make([]influx.Point, 0, len(samples))
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for _, s := range samples {
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v := float64(s.Value)
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if math.IsNaN(v) || math.IsInf(v, 0) {
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log.Debugf("cannot send value %f to InfluxDB, skipping sample %#v", v, s)
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c.ignoredSamples.Inc()
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continue
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}
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points = append(points, influx.Point{
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Measurement: string(s.Metric[model.MetricNameLabel]),
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Tags: tagsFromMetric(s.Metric),
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Time: s.Timestamp.Time(),
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Precision: "ms",
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Fields: map[string]interface{}{
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"value": v,
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},
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})
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}
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bps := influx.BatchPoints{
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Points: points,
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Database: c.database,
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RetentionPolicy: c.retentionPolicy,
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}
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_, err := c.client.Write(bps)
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return err
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}
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// Name identifies the client as an InfluxDB client.
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func (c Client) Name() string {
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return "influxdb"
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}
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// Describe implements prometheus.Collector.
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func (c *Client) Describe(ch chan<- *prometheus.Desc) {
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ch <- c.ignoredSamples.Desc()
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}
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// Collect implements prometheus.Collector.
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func (c *Client) Collect(ch chan<- prometheus.Metric) {
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ch <- c.ignoredSamples
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}
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