mirror of
https://gitee.com/rainbond/Rainbond.git
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126 lines
3.8 KiB
Go
126 lines
3.8 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 monitor
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import (
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"github.com/goodrain/rainbond/eventlog/cluster"
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"github.com/goodrain/rainbond/eventlog/store"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/prometheus/client_golang/prometheus"
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)
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// Metric name parts.
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const (
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// Namespace for all metrics.
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namespace = "event_log"
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// Subsystem(s).
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exporter = "exporter"
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)
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// Metric descriptors.
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var (
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scrapeDurationDesc = prometheus.NewDesc(
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prometheus.BuildFQName(namespace, exporter, "collector_duration_seconds"),
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"Collector time duration.",
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[]string{"collector"}, nil,
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)
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)
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//Exporter collects entrance metrics. It implements prometheus.Collector.
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type Exporter struct {
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error prometheus.Gauge
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totalScrapes prometheus.Counter
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scrapeErrors *prometheus.CounterVec
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storeManager store.Manager
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cluster cluster.Cluster
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}
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//NewExporter new a exporter
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func NewExporter(storeManager store.Manager, cluster cluster.Cluster) *Exporter {
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return &Exporter{
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totalScrapes: prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: namespace,
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Subsystem: exporter,
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Name: "scrapes_total",
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Help: "Total number of times Entrance was scraped for metrics.",
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}),
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scrapeErrors: prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: namespace,
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Subsystem: exporter,
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Name: "scrape_errors_total",
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Help: "Total number of times an error occurred scraping a Entrance.",
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}, []string{"collector"}),
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error: prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: namespace,
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Subsystem: exporter,
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Name: "last_scrape_error",
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Help: "Whether the last scrape of metrics from Entrance resulted in an error (1 for error, 0 for success).",
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}),
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storeManager: storeManager,
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cluster: cluster,
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}
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}
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//Describe implements prometheus.Collector.
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func (e *Exporter) Describe(ch chan<- *prometheus.Desc) {
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metricCh := make(chan prometheus.Metric)
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doneCh := make(chan struct{})
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go func() {
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for m := range metricCh {
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ch <- m.Desc()
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}
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close(doneCh)
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}()
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e.Collect(metricCh)
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close(metricCh)
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<-doneCh
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}
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// Collect implements prometheus.Collector.
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func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
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e.scrape(ch)
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ch <- e.totalScrapes
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ch <- e.error
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e.scrapeErrors.Collect(ch)
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}
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func (e *Exporter) scrape(ch chan<- prometheus.Metric) {
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scrapeTime := time.Now()
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e.totalScrapes.Inc()
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if err := e.storeManager.Scrape(ch, namespace, exporter, e.cluster.GetInstanceHost()); err != nil {
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logrus.Error("core manager scrape for prometheus error.", err.Error())
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e.error.Set(1)
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}
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if err := e.cluster.Scrape(ch, namespace, exporter); err != nil {
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logrus.Error("core manager scrape for prometheus error.", err.Error())
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e.error.Set(1)
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}
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//step last: scrape time
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scrapeDurationDesc := prometheus.NewDesc(
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prometheus.BuildFQName(namespace, exporter, "collector_duration_seconds"),
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"Collector time duration.",
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nil, nil,
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)
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ch <- prometheus.MustNewConstMetric(scrapeDurationDesc, prometheus.GaugeValue, time.Since(scrapeTime).Seconds())
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}
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