mirror of
https://gitee.com/rainbond/Rainbond.git
synced 2024-12-04 20:57:38 +08:00
664 lines
17 KiB
Go
664 lines
17 KiB
Go
// Copyright (C) 2014-2018 Goodrain Co., Ltd.
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// RAINBOND, Application Management Platform
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version. For any non-GPL usage of Rainbond,
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// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
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// must be obtained first.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package exporter
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import (
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"bufio"
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"bytes"
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"encoding/binary"
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"fmt"
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"hash/fnv"
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"io"
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"net"
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"regexp"
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"strconv"
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"strings"
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"time"
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"unicode/utf8"
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"github.com/Sirupsen/logrus"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/log"
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"github.com/prometheus/common/model"
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)
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const (
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defaultHelp = "Metric autogenerated by statsd_exporter."
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regErrF = "A change of configuration created inconsistent metrics for " +
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"%q. You have to restart the statsd_exporter, and you should " +
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"consider the effects on your monitoring setup. Error: %s"
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)
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var (
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illegalCharsRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
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hash = fnv.New64a()
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strBuf bytes.Buffer // Used for hashing.
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intBuf = make([]byte, 8)
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)
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// hashNameAndLabels returns a hash value of the provided name string and all
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// the label names and values in the provided labels map.
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//
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// Not safe for concurrent use! (Uses a shared buffer and hasher to save on
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// allocations.)
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func hashNameAndLabels(name string, labels prometheus.Labels) uint64 {
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hash.Reset()
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strBuf.Reset()
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strBuf.WriteString(name)
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hash.Write(strBuf.Bytes())
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binary.BigEndian.PutUint64(intBuf, model.LabelsToSignature(labels))
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hash.Write(intBuf)
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return hash.Sum64()
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}
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type CounterContainer struct {
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Elements map[uint64]prometheus.Counter
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Register prometheus.Registerer
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}
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func NewCounterContainer(Register prometheus.Registerer) *CounterContainer {
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return &CounterContainer{
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Elements: make(map[uint64]prometheus.Counter),
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Register: Register,
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}
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}
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func (c *CounterContainer) Get(metricName string, labels prometheus.Labels, help string) (prometheus.Counter, error) {
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hash := hashNameAndLabels(metricName, labels)
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counter, ok := c.Elements[hash]
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if !ok {
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counter = prometheus.NewCounter(prometheus.CounterOpts{
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Name: metricName,
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Help: help,
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ConstLabels: labels,
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})
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if err := c.Register.Register(counter); err != nil {
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return nil, err
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}
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c.Elements[hash] = counter
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}
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return counter, nil
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}
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type GaugeContainer struct {
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Elements map[uint64]prometheus.Gauge
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Register prometheus.Registerer
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}
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func NewGaugeContainer(Register prometheus.Registerer) *GaugeContainer {
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return &GaugeContainer{
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Elements: make(map[uint64]prometheus.Gauge),
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Register: Register,
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}
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}
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func (c *GaugeContainer) Get(metricName string, labels prometheus.Labels, help string) (prometheus.Gauge, error) {
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hash := hashNameAndLabels(metricName, labels)
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gauge, ok := c.Elements[hash]
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if !ok {
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gauge = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: metricName,
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Help: help,
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ConstLabels: labels,
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})
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if err := c.Register.Register(gauge); err != nil {
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return nil, err
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}
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c.Elements[hash] = gauge
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}
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return gauge, nil
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}
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type SummaryContainer struct {
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Elements map[uint64]prometheus.Summary
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Register prometheus.Registerer
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}
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func NewSummaryContainer(Register prometheus.Registerer) *SummaryContainer {
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return &SummaryContainer{
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Elements: make(map[uint64]prometheus.Summary),
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Register: Register,
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}
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}
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func (c *SummaryContainer) Get(metricName string, labels prometheus.Labels, help string) (prometheus.Summary, error) {
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hash := hashNameAndLabels(metricName, labels)
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summary, ok := c.Elements[hash]
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if !ok {
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summary = prometheus.NewSummary(
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prometheus.SummaryOpts{
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Name: metricName,
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Help: help,
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ConstLabels: labels,
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})
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if err := c.Register.Register(summary); err != nil {
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||
return nil, err
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||
}
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c.Elements[hash] = summary
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||
}
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return summary, nil
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}
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type HistogramContainer struct {
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Elements map[uint64]prometheus.Histogram
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mapper *MetricMapper
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Register prometheus.Registerer
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}
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func NewHistogramContainer(mapper *MetricMapper, Register prometheus.Registerer) *HistogramContainer {
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return &HistogramContainer{
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Elements: make(map[uint64]prometheus.Histogram),
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mapper: mapper,
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Register: Register,
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}
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}
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func (c *HistogramContainer) Get(metricName string, labels prometheus.Labels, help string, mapping *metricMapping) (prometheus.Histogram, error) {
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hash := hashNameAndLabels(metricName, labels)
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histogram, ok := c.Elements[hash]
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if !ok {
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buckets := c.mapper.Defaults.Buckets
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if mapping != nil && mapping.Buckets != nil && len(mapping.Buckets) > 0 {
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buckets = mapping.Buckets
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}
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histogram = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Name: metricName,
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Help: help,
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ConstLabels: labels,
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Buckets: buckets,
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})
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c.Elements[hash] = histogram
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if err := c.Register.Register(histogram); err != nil {
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return nil, err
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}
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}
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return histogram, nil
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}
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type Event interface {
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MetricName() string
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Value() float64
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Labels() map[string]string
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}
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type CounterEvent struct {
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metricName string
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value float64
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labels map[string]string
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}
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func (c *CounterEvent) MetricName() string { return c.metricName }
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func (c *CounterEvent) Value() float64 { return c.value }
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func (c *CounterEvent) Labels() map[string]string { return c.labels }
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type GaugeEvent struct {
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metricName string
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value float64
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relative bool
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labels map[string]string
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}
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func (g *GaugeEvent) MetricName() string { return g.metricName }
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func (g *GaugeEvent) Value() float64 { return g.value }
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func (c *GaugeEvent) Labels() map[string]string { return c.labels }
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type TimerEvent struct {
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metricName string
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value float64
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labels map[string]string
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}
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func (t *TimerEvent) MetricName() string { return t.metricName }
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func (t *TimerEvent) Value() float64 { return t.value }
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func (c *TimerEvent) Labels() map[string]string { return c.labels }
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type Events []Event
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type Exporter struct {
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Counters *CounterContainer
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Gauges *GaugeContainer
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Summaries *SummaryContainer
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Histograms *HistogramContainer
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mapper *MetricMapper
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vitality int64
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}
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func escapeMetricName(metricName string) string {
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// If a metric starts with a digit, prepend an underscore.
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if metricName[0] >= '0' && metricName[0] <= '9' {
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metricName = "_" + metricName
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}
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// Replace all illegal metric chars with underscores.
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metricName = illegalCharsRE.ReplaceAllString(metricName, "_")
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return metricName
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}
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func (b *Exporter) Listen(e <-chan Events) {
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for {
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events, ok := <-e
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if !ok {
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log.Debug("Channel is closed. Break out of Exporter.Listener.")
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return
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}
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for _, event := range events {
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var help string
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metricName := ""
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prometheusLabels := event.Labels()
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timestamp := time.Now().Unix()
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||
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mapping, labels, present := b.mapper.getMapping(event.MetricName())
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if mapping == nil {
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mapping = &metricMapping{}
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}
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||
if mapping.HelpText == "" {
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||
help = defaultHelp
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||
} else {
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||
help = mapping.HelpText
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||
}
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||
if present {
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||
metricName = mapping.Name
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||
for label, value := range labels {
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||
prometheusLabels[label] = value
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||
}
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||
} else {
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||
eventsUnmapped.Inc()
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||
metricName = escapeMetricName(event.MetricName())
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||
}
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||
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||
switch ev := event.(type) {
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||
case *CounterEvent:
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||
// We don't accept negative values for counters. Incrementing the counter with a negative number
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||
// will cause the exporter to panic. Instead we will warn and continue to the next event.
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||
if event.Value() < 0.0 {
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||
log.Debugf("Counter %q is: '%f' (counter must be non-negative value)", metricName, event.Value())
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||
eventStats.WithLabelValues("illegal_negative_counter").Inc()
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||
continue
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||
}
|
||
|
||
counter, err := b.Counters.Get(
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||
metricName,
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||
prometheusLabels,
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||
help,
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||
)
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||
if err == nil {
|
||
counter.Add(event.Value())
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||
counter.SetTimestamp(timestamp)
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||
eventStats.WithLabelValues("counter").Inc()
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||
} else {
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||
log.Debugf(regErrF, metricName, err)
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||
conflictingEventStats.WithLabelValues("counter").Inc()
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||
}
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||
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||
case *GaugeEvent:
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||
gauge, err := b.Gauges.Get(
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||
metricName,
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||
prometheusLabels,
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||
help,
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||
)
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||
|
||
if err == nil {
|
||
if ev.relative {
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||
gauge.Add(event.Value())
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||
} else {
|
||
gauge.Set(event.Value())
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||
}
|
||
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||
gauge.SetTimestamp(timestamp)
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||
eventStats.WithLabelValues("gauge").Inc()
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||
} else {
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||
log.Debugf(regErrF, metricName, err)
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||
conflictingEventStats.WithLabelValues("gauge").Inc()
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||
}
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||
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||
case *TimerEvent:
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||
t := timerTypeDefault
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||
if mapping != nil {
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||
t = mapping.TimerType
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||
}
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||
if t == timerTypeDefault {
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||
t = b.mapper.Defaults.TimerType
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||
}
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||
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||
switch t {
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||
case timerTypeHistogram:
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histogram, err := b.Histograms.Get(
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||
metricName,
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||
prometheusLabels,
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help,
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mapping,
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||
)
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||
if err == nil {
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||
histogram.Observe(event.Value() / 1000) // prometheus presumes seconds, statsd millisecond
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||
histogram.SetTimestamp(timestamp)
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eventStats.WithLabelValues("timer").Inc()
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||
} else {
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||
log.Debugf(regErrF, metricName, err)
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||
conflictingEventStats.WithLabelValues("timer").Inc()
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||
}
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||
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||
case timerTypeDefault, timerTypeSummary:
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||
summary, err := b.Summaries.Get(
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||
metricName,
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||
prometheusLabels,
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||
help,
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||
)
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||
if err == nil {
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||
summary.Observe(event.Value())
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summary.SetTimestamp(timestamp)
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||
eventStats.WithLabelValues("timer").Inc()
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||
} else {
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||
log.Debugf(regErrF, metricName, err)
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||
conflictingEventStats.WithLabelValues("timer").Inc()
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||
}
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||
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||
default:
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||
panic(fmt.Sprintf("unknown timer type '%s'", t))
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||
}
|
||
|
||
default:
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||
log.Debugln("Unsupported event type")
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||
eventStats.WithLabelValues("illegal").Inc()
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||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
//GCollector 循环检查Exporter对象中的性能指标数据是否有过期，有则清除
|
||
func (b *Exporter) GCollector() {
|
||
var HP = b.vitality
|
||
timer := time.NewTicker(time.Second * 10)
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||
defer timer.Stop()
|
||
for {
|
||
select {
|
||
case <-timer.C:
|
||
}
|
||
currentTime := time.Now().Unix()
|
||
oldCounters := len(b.Counters.Elements)
|
||
oldGauges := len(b.Gauges.Elements)
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||
oldHistograms := len(b.Histograms.Elements)
|
||
oldSummaries := len(b.Summaries.Elements)
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||
|
||
for k, v := range b.Counters.Elements {
|
||
oldTime := v.GetTimestamp()
|
||
if (currentTime - oldTime) > HP {
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||
delete(b.Counters.Elements, k)
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||
b.Counters.Register.Unregister(v)
|
||
}
|
||
}
|
||
|
||
for k, v := range b.Gauges.Elements {
|
||
oldTime := v.GetTimestamp()
|
||
if (currentTime - oldTime) > HP {
|
||
delete(b.Gauges.Elements, k)
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||
b.Gauges.Register.Unregister(v)
|
||
}
|
||
}
|
||
|
||
for k, v := range b.Histograms.Elements {
|
||
oldTime := v.GetTimestamp()
|
||
if (currentTime - oldTime) > HP {
|
||
delete(b.Histograms.Elements, k)
|
||
b.Histograms.Register.Unregister(v)
|
||
}
|
||
}
|
||
|
||
for k, v := range b.Summaries.Elements {
|
||
oldTime := v.GetTimestamp()
|
||
if (currentTime - oldTime) > HP {
|
||
delete(b.Summaries.Elements, k)
|
||
b.Summaries.Register.Unregister(v)
|
||
}
|
||
}
|
||
|
||
logrus.Debugf("current amount for Counters: %v => %v", oldCounters, len(b.Counters.Elements))
|
||
logrus.Debugf("current amount for Gauges: %v => %v", oldGauges, len(b.Gauges.Elements))
|
||
logrus.Debugf("current amount for Histograms: %v => %v", oldHistograms, len(b.Histograms.Elements))
|
||
logrus.Debugf("current amount for Summaries: %v => %v", oldSummaries, len(b.Summaries.Elements))
|
||
logrus.Info("clean exporter data complete")
|
||
}
|
||
}
|
||
|
||
//NewExporter new exporter
|
||
func NewExporter(mapper *MetricMapper, Register prometheus.Registerer) *Exporter {
|
||
return &Exporter{
|
||
Counters: NewCounterContainer(Register),
|
||
Gauges: NewGaugeContainer(Register),
|
||
Summaries: NewSummaryContainer(Register),
|
||
Histograms: NewHistogramContainer(mapper, Register),
|
||
mapper: mapper,
|
||
vitality: 20,
|
||
}
|
||
}
|
||
|
||
func buildEvent(statType, metric string, value float64, relative bool, labels map[string]string) (Event, error) {
|
||
switch statType {
|
||
case "c":
|
||
return &CounterEvent{
|
||
metricName: metric,
|
||
value: float64(value),
|
||
labels: labels,
|
||
}, nil
|
||
case "g":
|
||
return &GaugeEvent{
|
||
metricName: metric,
|
||
value: float64(value),
|
||
relative: relative,
|
||
labels: labels,
|
||
}, nil
|
||
case "ms", "h":
|
||
return &TimerEvent{
|
||
metricName: metric,
|
||
value: float64(value),
|
||
labels: labels,
|
||
}, nil
|
||
case "s":
|
||
return nil, fmt.Errorf("No support for StatsD sets")
|
||
default:
|
||
return nil, fmt.Errorf("Bad stat type %s", statType)
|
||
}
|
||
}
|
||
|
||
func parseDogStatsDTagsToLabels(component string) map[string]string {
|
||
labels := map[string]string{}
|
||
tagsReceived.Inc()
|
||
tags := strings.Split(component, ",")
|
||
for _, t := range tags {
|
||
t = strings.TrimPrefix(t, "#")
|
||
kv := strings.SplitN(t, ":", 2)
|
||
|
||
if len(kv) < 2 || len(kv[1]) == 0 {
|
||
tagErrors.Inc()
|
||
log.Debugf("Malformed or empty DogStatsD tag %s in component %s", t, component)
|
||
continue
|
||
}
|
||
|
||
labels[escapeMetricName(kv[0])] = kv[1]
|
||
}
|
||
return labels
|
||
}
|
||
|
||
func lineToEvents(line string) Events {
|
||
events := Events{}
|
||
if line == "" {
|
||
return events
|
||
}
|
||
|
||
elements := strings.SplitN(line, ":", 2)
|
||
if len(elements) < 2 || len(elements[0]) == 0 || !utf8.ValidString(line) {
|
||
sampleErrors.WithLabelValues("malformed_line").Inc()
|
||
log.Debugln("Bad line from StatsD:", line)
|
||
return events
|
||
}
|
||
metric := elements[0]
|
||
var samples []string
|
||
if strings.Contains(elements[1], "|#") {
|
||
// using datadog extensions, disable multi-metrics
|
||
samples = elements[1:]
|
||
} else {
|
||
samples = strings.Split(elements[1], ":")
|
||
}
|
||
samples:
|
||
for _, sample := range samples {
|
||
samplesReceived.Inc()
|
||
components := strings.Split(sample, "|")
|
||
samplingFactor := 1.0
|
||
if len(components) < 2 || len(components) > 4 {
|
||
sampleErrors.WithLabelValues("malformed_component").Inc()
|
||
log.Debugln("Bad component on line:", line)
|
||
continue
|
||
}
|
||
valueStr, statType := components[0], components[1]
|
||
|
||
var relative = false
|
||
if strings.Index(valueStr, "+") == 0 || strings.Index(valueStr, "-") == 0 {
|
||
relative = true
|
||
}
|
||
|
||
value, err := strconv.ParseFloat(valueStr, 64)
|
||
if err != nil {
|
||
log.Debugf("Bad value %s on line: %s", valueStr, line)
|
||
sampleErrors.WithLabelValues("malformed_value").Inc()
|
||
continue
|
||
}
|
||
|
||
multiplyEvents := 1
|
||
labels := map[string]string{}
|
||
if len(components) >= 3 {
|
||
for _, component := range components[2:] {
|
||
if len(component) == 0 {
|
||
log.Debugln("Empty component on line: ", line)
|
||
sampleErrors.WithLabelValues("malformed_component").Inc()
|
||
continue samples
|
||
}
|
||
}
|
||
|
||
for _, component := range components[2:] {
|
||
switch component[0] {
|
||
case '@':
|
||
if statType != "c" && statType != "ms" {
|
||
log.Debugln("Illegal sampling factor for non-counter metric on line", line)
|
||
sampleErrors.WithLabelValues("illegal_sample_factor").Inc()
|
||
continue
|
||
}
|
||
samplingFactor, err = strconv.ParseFloat(component[1:], 64)
|
||
if err != nil {
|
||
log.Debugf("Invalid sampling factor %s on line %s", component[1:], line)
|
||
sampleErrors.WithLabelValues("invalid_sample_factor").Inc()
|
||
}
|
||
if samplingFactor == 0 {
|
||
samplingFactor = 1
|
||
}
|
||
|
||
if statType == "c" {
|
||
value /= samplingFactor
|
||
} else if statType == "ms" {
|
||
multiplyEvents = int(1 / samplingFactor)
|
||
}
|
||
case '#':
|
||
labels = parseDogStatsDTagsToLabels(component)
|
||
default:
|
||
log.Debugf("Invalid sampling factor or tag section %s on line %s", components[2], line)
|
||
sampleErrors.WithLabelValues("invalid_sample_factor").Inc()
|
||
continue
|
||
}
|
||
}
|
||
}
|
||
|
||
for i := 0; i < multiplyEvents; i++ {
|
||
event, err := buildEvent(statType, metric, value, relative, labels)
|
||
if err != nil {
|
||
log.Debugf("Error building event on line %s: %s", line, err)
|
||
sampleErrors.WithLabelValues("illegal_event").Inc()
|
||
continue
|
||
}
|
||
events = append(events, event)
|
||
}
|
||
}
|
||
return events
|
||
}
|
||
|
||
type StatsDUDPListener struct {
|
||
Conn *net.UDPConn
|
||
}
|
||
|
||
func (l *StatsDUDPListener) Listen(e chan<- Events) {
|
||
buf := make([]byte, 65535)
|
||
for {
|
||
n, _, err := l.Conn.ReadFromUDP(buf)
|
||
if err != nil {
|
||
log.Fatal(err)
|
||
}
|
||
l.handlePacket(buf[0:n], e)
|
||
}
|
||
}
|
||
|
||
func (l *StatsDUDPListener) handlePacket(packet []byte, e chan<- Events) {
|
||
udpPackets.Inc()
|
||
lines := strings.Split(string(packet), "\n")
|
||
events := Events{}
|
||
for _, line := range lines {
|
||
linesReceived.Inc()
|
||
events = append(events, lineToEvents(line)...)
|
||
}
|
||
e <- events
|
||
}
|
||
|
||
type StatsDTCPListener struct {
|
||
Conn *net.TCPListener
|
||
}
|
||
|
||
func (l *StatsDTCPListener) Listen(e chan<- Events) {
|
||
defer l.Conn.Close()
|
||
for {
|
||
c, err := l.Conn.AcceptTCP()
|
||
if err != nil {
|
||
log.Fatalf("AcceptTCP failed: %v", err)
|
||
}
|
||
go l.handleConn(c, e)
|
||
}
|
||
}
|
||
|
||
func (l *StatsDTCPListener) handleConn(c *net.TCPConn, e chan<- Events) {
|
||
defer c.Close()
|
||
|
||
tcpConnections.Inc()
|
||
|
||
r := bufio.NewReader(c)
|
||
for {
|
||
line, isPrefix, err := r.ReadLine()
|
||
if err != nil {
|
||
if err != io.EOF {
|
||
tcpErrors.Inc()
|
||
log.Debugf("Read %s failed: %v", c.RemoteAddr(), err)
|
||
}
|
||
break
|
||
}
|
||
if isPrefix {
|
||
tcpLineTooLong.Inc()
|
||
log.Debugf("Read %s failed: line too long", c.RemoteAddr())
|
||
break
|
||
}
|
||
linesReceived.Inc()
|
||
e <- lineToEvents(string(line))
|
||
}
|
||
}
|