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
|
|
@ -17,446 +17,37 @@ limitations under the License.
|
|||
package main
|
||||
|
||||
import (
|
||||
"path/filepath"
|
||||
|
||||
"github.com/golang/glog"
|
||||
|
||||
common "github.com/ncabatoff/process-exporter"
|
||||
"github.com/ncabatoff/process-exporter/proc"
|
||||
"github.com/prometheus/client_golang/prometheus"
|
||||
"reflect"
|
||||
|
||||
"k8s.io/ingress/controllers/nginx/pkg/metric/collector"
|
||||
)
|
||||
|
||||
// TODO add current namespace
|
||||
// TODO add ingress class
|
||||
var (
|
||||
// descriptions borrow from https://github.com/vozlt/nginx-module-vts
|
||||
|
||||
cpuSecsDesc = prometheus.NewDesc(
|
||||
"nginx_cpu_seconds_total",
|
||||
"Cpu usage in seconds",
|
||||
nil, nil)
|
||||
|
||||
numprocsDesc = prometheus.NewDesc(
|
||||
"nginx_num_procs",
|
||||
"number of processes",
|
||||
nil, nil)
|
||||
|
||||
memResidentbytesDesc = prometheus.NewDesc(
|
||||
"nginx_resident_memory_bytes",
|
||||
"number of bytes of memory in use",
|
||||
nil, nil)
|
||||
|
||||
memVirtualbytesDesc = prometheus.NewDesc(
|
||||
"nginx_virtual_memory_bytes",
|
||||
"number of bytes of memory in use",
|
||||
nil, nil)
|
||||
|
||||
readBytesDesc = prometheus.NewDesc(
|
||||
"nginx_read_bytes_total",
|
||||
"number of bytes read",
|
||||
nil, nil)
|
||||
|
||||
startTimeDesc = prometheus.NewDesc(
|
||||
"nginx_oldest_start_time_seconds",
|
||||
"start time in seconds since 1970/01/01",
|
||||
nil, nil)
|
||||
|
||||
writeBytesDesc = prometheus.NewDesc(
|
||||
"nginx_write_bytes_total",
|
||||
"number of bytes written",
|
||||
nil, nil)
|
||||
|
||||
//vts metrics
|
||||
vtsBytesDesc = prometheus.NewDesc(
|
||||
"nginx_vts_bytes_total",
|
||||
"Nginx bytes count",
|
||||
[]string{"server_zone", "direction"}, nil)
|
||||
|
||||
vtsCacheDesc = prometheus.NewDesc(
|
||||
"nginx_vts_cache_total",
|
||||
"Nginx cache count",
|
||||
[]string{"server_zone", "type"}, nil)
|
||||
|
||||
vtsConnectionsDesc = prometheus.NewDesc(
|
||||
"nginx_vts_connections_total",
|
||||
"Nginx connections count",
|
||||
[]string{"type"}, nil)
|
||||
|
||||
vtsResponseDesc = prometheus.NewDesc(
|
||||
"nginx_vts_responses_total",
|
||||
"The number of responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx.",
|
||||
[]string{"server_zone", "status_code"}, nil)
|
||||
|
||||
vtsRequestDesc = prometheus.NewDesc(
|
||||
"nginx_vts_requests_total",
|
||||
"The total number of requested client connections.",
|
||||
[]string{"server_zone"}, nil)
|
||||
|
||||
vtsFilterZoneBytesDesc = prometheus.NewDesc(
|
||||
"nginx_vts_filterzone_bytes_total",
|
||||
"Nginx bytes count",
|
||||
[]string{"server_zone", "country", "direction"}, nil)
|
||||
|
||||
vtsFilterZoneResponseDesc = prometheus.NewDesc(
|
||||
"nginx_vts_filterzone_responses_total",
|
||||
"The number of responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx.",
|
||||
[]string{"server_zone", "country", "status_code"}, nil)
|
||||
|
||||
vtsFilterZoneCacheDesc = prometheus.NewDesc(
|
||||
"nginx_vts_filterzone_cache_total",
|
||||
"Nginx cache count",
|
||||
[]string{"server_zone", "country", "type"}, nil)
|
||||
|
||||
vtsUpstreamBackupDesc = prometheus.NewDesc(
|
||||
"nginx_vts_upstream_backup",
|
||||
"Current backup setting of the server.",
|
||||
[]string{"upstream", "server"}, nil)
|
||||
|
||||
vtsUpstreamBytesDesc = prometheus.NewDesc(
|
||||
"nginx_vts_upstream_bytes_total",
|
||||
"The total number of bytes sent to this server.",
|
||||
[]string{"upstream", "server", "direction"}, nil)
|
||||
|
||||
vtsUpstreamDownDesc = prometheus.NewDesc(
|
||||
"nginx_vts_upstream_down_total",
|
||||
"Current down setting of the server.",
|
||||
[]string{"upstream", "server"}, nil)
|
||||
|
||||
vtsUpstreamFailTimeoutDesc = prometheus.NewDesc(
|
||||
"nginx_vts_upstream_fail_timeout",
|
||||
"Current fail_timeout setting of the server.",
|
||||
[]string{"upstream", "server"}, nil)
|
||||
|
||||
vtsUpstreamMaxFailsDesc = prometheus.NewDesc(
|
||||
"nginx_vts_upstream_maxfails",
|
||||
"Current max_fails setting of the server.",
|
||||
[]string{"upstream", "server"}, nil)
|
||||
|
||||
vtsUpstreamResponsesDesc = prometheus.NewDesc(
|
||||
"nginx_vts_upstream_responses_total",
|
||||
"The number of upstream responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx.",
|
||||
[]string{"upstream", "server", "status_code"}, nil)
|
||||
|
||||
vtsUpstreamRequestDesc = prometheus.NewDesc(
|
||||
"nginx_vts_upstream_requests_total",
|
||||
"The total number of client connections forwarded to this server.",
|
||||
[]string{"upstream", "server"}, nil)
|
||||
|
||||
vtsUpstreamResponseMsecDesc = prometheus.NewDesc(
|
||||
"nginx_vts_upstream_response_msecs_avg",
|
||||
"The average of only upstream response processing times in milliseconds.",
|
||||
[]string{"upstream", "server"}, nil)
|
||||
|
||||
vtsUpstreamWeightDesc = prometheus.NewDesc(
|
||||
"nginx_vts_upstream_weight",
|
||||
"Current upstream weight setting of the server.",
|
||||
[]string{"upstream", "server"}, nil)
|
||||
|
||||
activeDesc = prometheus.NewDesc(
|
||||
"nginx_active_connections",
|
||||
"total number of active connections",
|
||||
nil, nil)
|
||||
|
||||
acceptedDesc = prometheus.NewDesc(
|
||||
"nginx_accepted_connections",
|
||||
"total number of accepted client connections",
|
||||
nil, nil)
|
||||
|
||||
handledDesc = prometheus.NewDesc(
|
||||
"nginx_handled_connections",
|
||||
"total number of handled connections",
|
||||
nil, nil)
|
||||
|
||||
requestsDesc = prometheus.NewDesc(
|
||||
"nginx_total_requests",
|
||||
"total number of client requests",
|
||||
nil, nil)
|
||||
|
||||
readingDesc = prometheus.NewDesc(
|
||||
"nginx_current_reading_connections",
|
||||
"current number of connections where nginx is reading the request header",
|
||||
nil, nil)
|
||||
|
||||
writingDesc = prometheus.NewDesc(
|
||||
"nginx_current_writing_connections",
|
||||
"current number of connections where nginx is writing the response back to the client",
|
||||
nil, nil)
|
||||
|
||||
waitingDesc = prometheus.NewDesc(
|
||||
"nginx_current_waiting_connections",
|
||||
"current number of idle client connections waiting for a request",
|
||||
nil, nil)
|
||||
)
|
||||
|
||||
type exeMatcher struct {
|
||||
name string
|
||||
args []string
|
||||
}
|
||||
|
||||
func (em exeMatcher) MatchAndName(nacl common.NameAndCmdline) (bool, string) {
|
||||
if len(nacl.Cmdline) == 0 {
|
||||
return false, ""
|
||||
func (n *NGINXController) setupMonitor(sm statusModule) {
|
||||
csm := n.statusModule
|
||||
if csm != sm {
|
||||
prometheus
|
||||
n.statusModule = sm
|
||||
}
|
||||
cmd := filepath.Base(nacl.Cmdline[0])
|
||||
return em.name == cmd, ""
|
||||
}
|
||||
|
||||
func (n *NGINXController) setupMonitor(args []string, vtsCollector bool) {
|
||||
|
||||
pc, err := newProcessCollector(true, exeMatcher{"nginx", args}, vtsCollector)
|
||||
type statsCollector struct {
|
||||
process prometheus.Collector
|
||||
basic prometheus.Collector
|
||||
vts prometheus.Collector
|
||||
}
|
||||
|
||||
func newStatsCollector() (*statsCollector, error) {
|
||||
pc, err := collector.NewNamedProcess(true, collector.BinaryNameMatcher{"nginx", n.cmdArgs})
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
err = prometheus.Register(pc)
|
||||
if err != nil {
|
||||
glog.Fatalf("unexpected error registering nginx collector: %v", err)
|
||||
}
|
||||
|
||||
err = prometheus.Register(pc)
|
||||
|
||||
if err != nil {
|
||||
if _, ok := err.(prometheus.AlreadyRegisteredError); !ok {
|
||||
glog.Warningf("unexpected error registering nginx collector: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
type (
|
||||
scrapeRequest struct {
|
||||
results chan<- prometheus.Metric
|
||||
done chan struct{}
|
||||
}
|
||||
|
||||
namedProcessCollector struct {
|
||||
scrapeChan chan scrapeRequest
|
||||
*proc.Grouper
|
||||
fs *proc.FS
|
||||
enableVtsCollector bool
|
||||
}
|
||||
)
|
||||
|
||||
func newProcessCollector(
|
||||
children bool,
|
||||
n common.MatchNamer,
|
||||
enableVtsCollector bool) (*namedProcessCollector, error) {
|
||||
|
||||
fs, err := proc.NewFS("/proc")
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
p := &namedProcessCollector{
|
||||
scrapeChan: make(chan scrapeRequest),
|
||||
Grouper: proc.NewGrouper(children, n),
|
||||
fs: fs,
|
||||
enableVtsCollector: enableVtsCollector,
|
||||
}
|
||||
_, err = p.Update(p.fs.AllProcs())
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
go p.start()
|
||||
|
||||
return p, nil
|
||||
}
|
||||
|
||||
// Describe implements prometheus.Collector.
|
||||
func (p *namedProcessCollector) Describe(ch chan<- *prometheus.Desc) {
|
||||
|
||||
ch <- cpuSecsDesc
|
||||
ch <- numprocsDesc
|
||||
ch <- readBytesDesc
|
||||
ch <- writeBytesDesc
|
||||
ch <- memResidentbytesDesc
|
||||
ch <- memVirtualbytesDesc
|
||||
ch <- startTimeDesc
|
||||
|
||||
//vts metrics
|
||||
ch <- vtsBytesDesc
|
||||
ch <- vtsCacheDesc
|
||||
ch <- vtsConnectionsDesc
|
||||
ch <- vtsRequestDesc
|
||||
ch <- vtsResponseDesc
|
||||
ch <- vtsUpstreamBackupDesc
|
||||
ch <- vtsUpstreamBytesDesc
|
||||
ch <- vtsUpstreamDownDesc
|
||||
ch <- vtsUpstreamFailTimeoutDesc
|
||||
ch <- vtsUpstreamMaxFailsDesc
|
||||
ch <- vtsUpstreamRequestDesc
|
||||
ch <- vtsUpstreamResponseMsecDesc
|
||||
ch <- vtsUpstreamResponsesDesc
|
||||
ch <- vtsUpstreamWeightDesc
|
||||
ch <- vtsFilterZoneBytesDesc
|
||||
ch <- vtsFilterZoneCacheDesc
|
||||
ch <- vtsFilterZoneResponseDesc
|
||||
|
||||
}
|
||||
|
||||
// Collect implements prometheus.Collector.
|
||||
func (p *namedProcessCollector) Collect(ch chan<- prometheus.Metric) {
|
||||
req := scrapeRequest{results: ch, done: make(chan struct{})}
|
||||
p.scrapeChan <- req
|
||||
<-req.done
|
||||
}
|
||||
|
||||
func (p *namedProcessCollector) start() {
|
||||
|
||||
for req := range p.scrapeChan {
|
||||
ch := req.results
|
||||
p.scrapeNginxStatus(ch)
|
||||
p.scrapeProcs(ch)
|
||||
p.scrapeVts(ch)
|
||||
|
||||
req.done <- struct{}{}
|
||||
return nil, &statsCollector{
|
||||
process: pc,
|
||||
}
|
||||
}
|
||||
|
||||
// scrapeNginxStatus scrap the nginx status
|
||||
func (p *namedProcessCollector) scrapeNginxStatus(ch chan<- prometheus.Metric) {
|
||||
s, err := getNginxStatus()
|
||||
|
||||
if err != nil {
|
||||
glog.Warningf("unexpected error obtaining nginx status info: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(activeDesc,
|
||||
prometheus.GaugeValue, float64(s.Active))
|
||||
ch <- prometheus.MustNewConstMetric(acceptedDesc,
|
||||
prometheus.GaugeValue, float64(s.Accepted))
|
||||
ch <- prometheus.MustNewConstMetric(handledDesc,
|
||||
prometheus.GaugeValue, float64(s.Handled))
|
||||
ch <- prometheus.MustNewConstMetric(requestsDesc,
|
||||
prometheus.GaugeValue, float64(s.Requests))
|
||||
ch <- prometheus.MustNewConstMetric(readingDesc,
|
||||
prometheus.GaugeValue, float64(s.Reading))
|
||||
ch <- prometheus.MustNewConstMetric(writingDesc,
|
||||
prometheus.GaugeValue, float64(s.Writing))
|
||||
ch <- prometheus.MustNewConstMetric(waitingDesc,
|
||||
prometheus.GaugeValue, float64(s.Waiting))
|
||||
|
||||
}
|
||||
|
||||
// scrapeVts scrape nginx vts metrics
|
||||
func (p *namedProcessCollector) scrapeVts(ch chan<- prometheus.Metric) {
|
||||
|
||||
nginxMetrics, err := getNginxVtsMetrics()
|
||||
if err != nil {
|
||||
glog.Warningf("unexpected error obtaining nginx status info: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
reflectMetrics(&nginxMetrics.Connections, vtsConnectionsDesc, ch)
|
||||
|
||||
for name, zones := range nginxMetrics.UpstreamZones {
|
||||
|
||||
for pos, value := range zones {
|
||||
|
||||
reflectMetrics(&zones[pos].Responses, vtsUpstreamResponsesDesc, ch, name, value.Server)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsUpstreamRequestDesc,
|
||||
prometheus.CounterValue, float64(zones[pos].RequestCounter), name, value.Server)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsUpstreamDownDesc,
|
||||
prometheus.CounterValue, float64(zones[pos].Down), name, value.Server)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsUpstreamWeightDesc,
|
||||
prometheus.CounterValue, float64(zones[pos].Weight), name, value.Server)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsUpstreamResponseMsecDesc,
|
||||
prometheus.CounterValue, float64(zones[pos].ResponseMsec), name, value.Server)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsUpstreamBackupDesc,
|
||||
prometheus.CounterValue, float64(zones[pos].Backup), name, value.Server)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsUpstreamFailTimeoutDesc,
|
||||
prometheus.CounterValue, float64(zones[pos].FailTimeout), name, value.Server)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsUpstreamMaxFailsDesc,
|
||||
prometheus.CounterValue, float64(zones[pos].MaxFails), name, value.Server)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsUpstreamBytesDesc,
|
||||
prometheus.CounterValue, float64(zones[pos].InBytes), name, value.Server, "in")
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsUpstreamBytesDesc,
|
||||
prometheus.CounterValue, float64(zones[pos].OutBytes), name, value.Server, "out")
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
for name, zone := range nginxMetrics.ServerZones {
|
||||
|
||||
reflectMetrics(&zone.Responses, vtsResponseDesc, ch, name)
|
||||
reflectMetrics(&zone.Cache, vtsCacheDesc, ch, name)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsRequestDesc,
|
||||
prometheus.CounterValue, float64(zone.RequestCounter), name)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsBytesDesc,
|
||||
prometheus.CounterValue, float64(zone.InBytes), name, "in")
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsBytesDesc,
|
||||
prometheus.CounterValue, float64(zone.OutBytes), name, "out")
|
||||
|
||||
}
|
||||
|
||||
for serverZone, countries := range nginxMetrics.FilterZones {
|
||||
|
||||
for country, zone := range countries {
|
||||
|
||||
reflectMetrics(&zone.Responses, vtsFilterZoneResponseDesc, ch, serverZone, country)
|
||||
reflectMetrics(&zone.Cache, vtsFilterZoneCacheDesc, ch, serverZone, country)
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsFilterZoneBytesDesc,
|
||||
prometheus.CounterValue, float64(zone.InBytes), serverZone, country, "in")
|
||||
|
||||
ch <- prometheus.MustNewConstMetric(vtsFilterZoneBytesDesc,
|
||||
prometheus.CounterValue, float64(zone.OutBytes), serverZone, country, "out")
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
func (p *namedProcessCollector) scrapeProcs(ch chan<- prometheus.Metric) {
|
||||
|
||||
_, err := p.Update(p.fs.AllProcs())
|
||||
if err != nil {
|
||||
glog.Warningf("unexpected error obtaining nginx process info: %v", err)
|
||||
return
|
||||
}
|
||||
|
||||
for gname, gcounts := range p.Groups() {
|
||||
glog.Infof("%v", gname)
|
||||
glog.Infof("%v", gcounts)
|
||||
ch <- prometheus.MustNewConstMetric(numprocsDesc,
|
||||
prometheus.GaugeValue, float64(gcounts.Procs))
|
||||
ch <- prometheus.MustNewConstMetric(memResidentbytesDesc,
|
||||
prometheus.GaugeValue, float64(gcounts.Memresident))
|
||||
ch <- prometheus.MustNewConstMetric(memVirtualbytesDesc,
|
||||
prometheus.GaugeValue, float64(gcounts.Memvirtual))
|
||||
ch <- prometheus.MustNewConstMetric(startTimeDesc,
|
||||
prometheus.GaugeValue, float64(gcounts.OldestStartTime.Unix()))
|
||||
ch <- prometheus.MustNewConstMetric(cpuSecsDesc,
|
||||
prometheus.CounterValue, gcounts.Cpu)
|
||||
ch <- prometheus.MustNewConstMetric(readBytesDesc,
|
||||
prometheus.CounterValue, float64(gcounts.ReadBytes))
|
||||
ch <- prometheus.MustNewConstMetric(writeBytesDesc,
|
||||
prometheus.CounterValue, float64(gcounts.WriteBytes))
|
||||
}
|
||||
}
|
||||
|
||||
func reflectMetrics(value interface{}, desc *prometheus.Desc, ch chan<- prometheus.Metric, labels ...string) {
|
||||
|
||||
val := reflect.ValueOf(value).Elem()
|
||||
|
||||
for i := 0; i < val.NumField(); i++ {
|
||||
tag := val.Type().Field(i).Tag
|
||||
|
||||
labels := append(labels, tag.Get("json"))
|
||||
ch <- prometheus.MustNewConstMetric(desc,
|
||||
prometheus.CounterValue, float64(val.Field(i).Interface().(float64)),
|
||||
labels...)
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue