mirror of
https://github.com/slackhq/nebula.git
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131 lines
6.1 KiB
Go
131 lines
6.1 KiB
Go
package nebula
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// This file is a trimmed, inlined copy of the graphite exporter from
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// github.com/cyberdelia/go-metrics-graphite, retaining only the Config type and
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// the Once entrypoint that Nebula uses. The upstream package has been
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// unmaintained for 10+ years, so it was vendored here to drop the dependency.
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// See https://github.com/slackhq/nebula/issues/1831.
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//
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// Copyright 2015 Timothée Peignier. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import (
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"bufio"
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"context"
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"fmt"
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"net"
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"strconv"
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"strings"
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"time"
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"github.com/rcrowley/go-metrics"
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)
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// graphiteConfigExport provides a container with configuration parameters for
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// the Graphite exporter.
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type graphiteConfigExport struct {
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Addr *net.TCPAddr // Network address to connect to
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Registry metrics.Registry // Registry to be exported
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FlushInterval time.Duration // Flush interval
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DurationUnit time.Duration // Time conversion unit for durations
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Prefix string // Prefix to be prepended to metric names
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Percentiles []float64 // Percentiles to export from timers and histograms
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}
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// graphiteTimeout bounds one submission, the connect and the write together. An export is a few KB, a host that can't
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// take that in this long isn't going to.
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const graphiteTimeout = 30 * time.Second
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// graphiteOnce performs a single submission to Graphite, returning a non-nil
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// error if it could not connect or write all of it within timeout. It gives up
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// as soon as ctx is done.
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func graphiteOnce(ctx context.Context, c graphiteConfigExport, timeout time.Duration) error {
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now := time.Now().Unix()
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du := float64(c.DurationUnit)
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flushSeconds := float64(c.FlushInterval) / float64(time.Second)
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deadline := time.Now().Add(timeout)
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d := net.Dialer{Deadline: deadline}
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conn, err := d.DialContext(ctx, "tcp", c.Addr.String())
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if err != nil {
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return err
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}
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defer conn.Close()
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if err := conn.SetDeadline(deadline); err != nil {
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return err
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}
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stop := context.AfterFunc(ctx, func() { _ = conn.Close() })
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defer stop()
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w := bufio.NewWriter(conn)
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c.Registry.Each(func(name string, i any) {
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switch metric := i.(type) {
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case metrics.Counter:
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count := metric.Count()
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fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, count, now)
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fmt.Fprintf(w, "%s.%s.count_ps %.2f %d\n", c.Prefix, name, float64(count)/flushSeconds, now)
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case metrics.Gauge:
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fmt.Fprintf(w, "%s.%s.value %d %d\n", c.Prefix, name, metric.Value(), now)
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case metrics.GaugeFloat64:
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fmt.Fprintf(w, "%s.%s.value %f %d\n", c.Prefix, name, metric.Value(), now)
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case metrics.Histogram:
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h := metric.Snapshot()
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ps := h.Percentiles(c.Percentiles)
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fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, h.Count(), now)
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fmt.Fprintf(w, "%s.%s.min %d %d\n", c.Prefix, name, h.Min(), now)
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fmt.Fprintf(w, "%s.%s.max %d %d\n", c.Prefix, name, h.Max(), now)
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fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, h.Mean(), now)
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fmt.Fprintf(w, "%s.%s.std-dev %.2f %d\n", c.Prefix, name, h.StdDev(), now)
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for psIdx, psKey := range c.Percentiles {
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key := strings.Replace(strconv.FormatFloat(psKey*100.0, 'f', -1, 64), ".", "", 1)
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fmt.Fprintf(w, "%s.%s.%s-percentile %.2f %d\n", c.Prefix, name, key, ps[psIdx], now)
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}
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case metrics.Meter:
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m := metric.Snapshot()
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fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, m.Count(), now)
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fmt.Fprintf(w, "%s.%s.one-minute %.2f %d\n", c.Prefix, name, m.Rate1(), now)
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fmt.Fprintf(w, "%s.%s.five-minute %.2f %d\n", c.Prefix, name, m.Rate5(), now)
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fmt.Fprintf(w, "%s.%s.fifteen-minute %.2f %d\n", c.Prefix, name, m.Rate15(), now)
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fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, m.RateMean(), now)
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case metrics.Timer:
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t := metric.Snapshot()
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ps := t.Percentiles(c.Percentiles)
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count := t.Count()
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fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, count, now)
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fmt.Fprintf(w, "%s.%s.count_ps %.2f %d\n", c.Prefix, name, float64(count)/flushSeconds, now)
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fmt.Fprintf(w, "%s.%s.min %d %d\n", c.Prefix, name, t.Min()/int64(du), now)
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fmt.Fprintf(w, "%s.%s.max %d %d\n", c.Prefix, name, t.Max()/int64(du), now)
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fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, t.Mean()/du, now)
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fmt.Fprintf(w, "%s.%s.std-dev %.2f %d\n", c.Prefix, name, t.StdDev()/du, now)
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for psIdx, psKey := range c.Percentiles {
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key := strings.Replace(strconv.FormatFloat(psKey*100.0, 'f', -1, 64), ".", "", 1)
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fmt.Fprintf(w, "%s.%s.%s-percentile %.2f %d\n", c.Prefix, name, key, ps[psIdx]/du, now)
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}
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fmt.Fprintf(w, "%s.%s.one-minute %.2f %d\n", c.Prefix, name, t.Rate1(), now)
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fmt.Fprintf(w, "%s.%s.five-minute %.2f %d\n", c.Prefix, name, t.Rate5(), now)
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fmt.Fprintf(w, "%s.%s.fifteen-minute %.2f %d\n", c.Prefix, name, t.Rate15(), now)
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fmt.Fprintf(w, "%s.%s.mean-rate %.2f %d\n", c.Prefix, name, t.RateMean(), now)
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}
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})
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// A failed write sticks, so this reports the first one
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return w.Flush()
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}
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