Cleanup collection of prometheus metrics
This commit is contained in:
Manuel de Brito Fontes
parent
1d38e3a384
commit
7ba389c1d0
11 changed files with 643 additions and 480 deletions
237
controllers/nginx/pkg/metric/collector/vts.go
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237
controllers/nginx/pkg/metric/collector/vts.go
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/*
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Copyright 2016 The Kubernetes 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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package collector
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import (
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"reflect"
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"github.com/golang/glog"
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"github.com/prometheus/client_golang/prometheus"
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)
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var (
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vtsBytesDesc = prometheus.NewDesc(
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"nginx_vts_bytes_total",
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"Nginx bytes count",
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[]string{"server_zone", "direction"}, nil)
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vtsCacheDesc = prometheus.NewDesc(
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"nginx_vts_cache_total",
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"Nginx cache count",
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[]string{"server_zone", "type"}, nil)
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vtsConnectionsDesc = prometheus.NewDesc(
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"nginx_vts_connections_total",
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"Nginx connections count",
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[]string{"type"}, nil)
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vtsResponseDesc = prometheus.NewDesc(
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"nginx_vts_responses_total",
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"The number of responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx.",
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[]string{"server_zone", "status_code"}, nil)
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vtsRequestDesc = prometheus.NewDesc(
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"nginx_vts_requests_total",
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"The total number of requested client connections.",
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[]string{"server_zone"}, nil)
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vtsFilterZoneBytesDesc = prometheus.NewDesc(
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"nginx_vts_filterzone_bytes_total",
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"Nginx bytes count",
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[]string{"server_zone", "country", "direction"}, nil)
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vtsFilterZoneResponseDesc = prometheus.NewDesc(
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"nginx_vts_filterzone_responses_total",
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"The number of responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx.",
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[]string{"server_zone", "country", "status_code"}, nil)
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vtsFilterZoneCacheDesc = prometheus.NewDesc(
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"nginx_vts_filterzone_cache_total",
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"Nginx cache count",
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[]string{"server_zone", "country", "type"}, nil)
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vtsUpstreamBackupDesc = prometheus.NewDesc(
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"nginx_vts_upstream_backup",
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"Current backup setting of the server.",
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[]string{"upstream", "server"}, nil)
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vtsUpstreamBytesDesc = prometheus.NewDesc(
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"nginx_vts_upstream_bytes_total",
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"The total number of bytes sent to this server.",
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[]string{"upstream", "server", "direction"}, nil)
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vtsUpstreamDownDesc = prometheus.NewDesc(
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"nginx_vts_upstream_down_total",
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"Current down setting of the server.",
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[]string{"upstream", "server"}, nil)
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vtsUpstreamFailTimeoutDesc = prometheus.NewDesc(
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"nginx_vts_upstream_fail_timeout",
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"Current fail_timeout setting of the server.",
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[]string{"upstream", "server"}, nil)
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vtsUpstreamMaxFailsDesc = prometheus.NewDesc(
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"nginx_vts_upstream_maxfails",
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"Current max_fails setting of the server.",
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[]string{"upstream", "server"}, nil)
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vtsUpstreamResponsesDesc = prometheus.NewDesc(
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"nginx_vts_upstream_responses_total",
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"The number of upstream responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx.",
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[]string{"upstream", "server", "status_code"}, nil)
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vtsUpstreamRequestDesc = prometheus.NewDesc(
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"nginx_vts_upstream_requests_total",
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"The total number of client connections forwarded to this server.",
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[]string{"upstream", "server"}, nil)
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vtsUpstreamResponseMsecDesc = prometheus.NewDesc(
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"nginx_vts_upstream_response_msecs_avg",
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"The average of only upstream response processing times in milliseconds.",
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[]string{"upstream", "server"}, nil)
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vtsUpstreamWeightDesc = prometheus.NewDesc(
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"nginx_vts_upstream_weight",
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"Current upstream weight setting of the server.",
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[]string{"upstream", "server"}, nil)
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)
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type vtsCollector struct {
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scrapeChan chan scrapeRequest
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}
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func NewNGINXVTSCollector() (prometheus.Collector, error) {
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p := vtsCollector{
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scrapeChan: make(chan scrapeRequest),
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}
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go p.start()
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return p, nil
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}
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// Describe implements prometheus.Collector.
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func (p *vtsCollector) Describe(ch chan<- *prometheus.Desc) {
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ch <- vtsBytesDesc
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ch <- vtsCacheDesc
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ch <- vtsConnectionsDesc
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ch <- vtsRequestDesc
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ch <- vtsResponseDesc
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ch <- vtsUpstreamBackupDesc
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ch <- vtsUpstreamBytesDesc
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ch <- vtsUpstreamDownDesc
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ch <- vtsUpstreamFailTimeoutDesc
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ch <- vtsUpstreamMaxFailsDesc
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ch <- vtsUpstreamRequestDesc
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ch <- vtsUpstreamResponseMsecDesc
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ch <- vtsUpstreamResponsesDesc
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ch <- vtsUpstreamWeightDesc
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ch <- vtsFilterZoneBytesDesc
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ch <- vtsFilterZoneCacheDesc
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ch <- vtsFilterZoneResponseDesc
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}
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// Collect implements prometheus.Collector.
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func (p *vtsCollector) Collect(ch chan<- prometheus.Metric) {
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req := scrapeRequest{results: ch, done: make(chan struct{})}
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p.scrapeChan <- req
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<-req.done
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}
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func (p *vtsCollector) start() {
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for req := range p.scrapeChan {
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ch := req.results
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p.scrapeVts(ch)
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req.done <- struct{}{}
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}
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}
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func (p *vtsCollector) Stop() {
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close(p.scrapeChan)
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}
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// scrapeVts scrape nginx vts metrics
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func (p *vtsCollector) scrapeVts(ch chan<- prometheus.Metric) {
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nginxMetrics, err := getNginxVtsMetrics()
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if err != nil {
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glog.Warningf("unexpected error obtaining nginx status info: %v", err)
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return
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}
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reflectMetrics(&nginxMetrics.Connections, vtsConnectionsDesc, ch)
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for name, zones := range nginxMetrics.UpstreamZones {
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for pos, value := range zones {
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reflectMetrics(&zones[pos].Responses, vtsUpstreamResponsesDesc, ch, name, value.Server)
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ch <- prometheus.MustNewConstMetric(vtsUpstreamRequestDesc,
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prometheus.CounterValue, float64(zones[pos].RequestCounter), name, value.Server)
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ch <- prometheus.MustNewConstMetric(vtsUpstreamDownDesc,
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prometheus.CounterValue, float64(zones[pos].Down), name, value.Server)
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ch <- prometheus.MustNewConstMetric(vtsUpstreamWeightDesc,
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prometheus.CounterValue, float64(zones[pos].Weight), name, value.Server)
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ch <- prometheus.MustNewConstMetric(vtsUpstreamResponseMsecDesc,
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prometheus.CounterValue, float64(zones[pos].ResponseMsec), name, value.Server)
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ch <- prometheus.MustNewConstMetric(vtsUpstreamBackupDesc,
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prometheus.CounterValue, float64(zones[pos].Backup), name, value.Server)
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ch <- prometheus.MustNewConstMetric(vtsUpstreamFailTimeoutDesc,
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prometheus.CounterValue, float64(zones[pos].FailTimeout), name, value.Server)
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ch <- prometheus.MustNewConstMetric(vtsUpstreamMaxFailsDesc,
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prometheus.CounterValue, float64(zones[pos].MaxFails), name, value.Server)
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ch <- prometheus.MustNewConstMetric(vtsUpstreamBytesDesc,
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prometheus.CounterValue, float64(zones[pos].InBytes), name, value.Server, "in")
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ch <- prometheus.MustNewConstMetric(vtsUpstreamBytesDesc,
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prometheus.CounterValue, float64(zones[pos].OutBytes), name, value.Server, "out")
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}
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}
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for name, zone := range nginxMetrics.ServerZones {
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reflectMetrics(&zone.Responses, vtsResponseDesc, ch, name)
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reflectMetrics(&zone.Cache, vtsCacheDesc, ch, name)
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ch <- prometheus.MustNewConstMetric(vtsRequestDesc,
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prometheus.CounterValue, float64(zone.RequestCounter), name)
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ch <- prometheus.MustNewConstMetric(vtsBytesDesc,
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prometheus.CounterValue, float64(zone.InBytes), name, "in")
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ch <- prometheus.MustNewConstMetric(vtsBytesDesc,
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prometheus.CounterValue, float64(zone.OutBytes), name, "out")
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}
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for serverZone, countries := range nginxMetrics.FilterZones {
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for country, zone := range countries {
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reflectMetrics(&zone.Responses, vtsFilterZoneResponseDesc, ch, serverZone, country)
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reflectMetrics(&zone.Cache, vtsFilterZoneCacheDesc, ch, serverZone, country)
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ch <- prometheus.MustNewConstMetric(vtsFilterZoneBytesDesc,
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prometheus.CounterValue, float64(zone.InBytes), serverZone, country, "in")
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ch <- prometheus.MustNewConstMetric(vtsFilterZoneBytesDesc,
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prometheus.CounterValue, float64(zone.OutBytes), serverZone, country, "out")
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}
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}
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}
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func reflectMetrics(value interface{}, desc *prometheus.Desc, ch chan<- prometheus.Metric, labels ...string) {
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val := reflect.ValueOf(value).Elem()
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for i := 0; i < val.NumField(); i++ {
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tag := val.Type().Field(i).Tag
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labels := append(labels, tag.Get("json"))
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ch <- prometheus.MustNewConstMetric(desc,
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prometheus.CounterValue, float64(val.Field(i).Interface().(float64)),
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labels...)
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}
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}
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