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process_collector.go
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process_collector.go
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package collector
import (
"log"
"time"
common "github.com/ncabatoff/process-exporter"
"github.com/ncabatoff/process-exporter/proc"
"github.com/prometheus/client_golang/prometheus"
)
var (
numprocsDesc = prometheus.NewDesc(
"namedprocess_namegroup_num_procs",
"number of processes in this group",
[]string{"groupname"},
nil)
cpuSecsDesc = prometheus.NewDesc(
"namedprocess_namegroup_cpu_seconds_total",
"Cpu user usage in seconds",
[]string{"groupname", "mode"},
nil)
readBytesDesc = prometheus.NewDesc(
"namedprocess_namegroup_read_bytes_total",
"number of bytes read by this group",
[]string{"groupname"},
nil)
writeBytesDesc = prometheus.NewDesc(
"namedprocess_namegroup_write_bytes_total",
"number of bytes written by this group",
[]string{"groupname"},
nil)
majorPageFaultsDesc = prometheus.NewDesc(
"namedprocess_namegroup_major_page_faults_total",
"Major page faults",
[]string{"groupname"},
nil)
minorPageFaultsDesc = prometheus.NewDesc(
"namedprocess_namegroup_minor_page_faults_total",
"Minor page faults",
[]string{"groupname"},
nil)
contextSwitchesDesc = prometheus.NewDesc(
"namedprocess_namegroup_context_switches_total",
"Context switches",
[]string{"groupname", "ctxswitchtype"},
nil)
membytesDesc = prometheus.NewDesc(
"namedprocess_namegroup_memory_bytes",
"number of bytes of memory in use",
[]string{"groupname", "memtype"},
nil)
openFDsDesc = prometheus.NewDesc(
"namedprocess_namegroup_open_filedesc",
"number of open file descriptors for this group",
[]string{"groupname"},
nil)
worstFDRatioDesc = prometheus.NewDesc(
"namedprocess_namegroup_worst_fd_ratio",
"the worst (closest to 1) ratio between open fds and max fds among all procs in this group",
[]string{"groupname"},
nil)
startTimeDesc = prometheus.NewDesc(
"namedprocess_namegroup_oldest_start_time_seconds",
"start time in seconds since 1970/01/01 of oldest process in group",
[]string{"groupname"},
nil)
numThreadsDesc = prometheus.NewDesc(
"namedprocess_namegroup_num_threads",
"Number of threads",
[]string{"groupname"},
nil)
statesDesc = prometheus.NewDesc(
"namedprocess_namegroup_states",
"Number of processes in states Running, Sleeping, Waiting, Zombie, or Other",
[]string{"groupname", "state"},
nil)
scrapeErrorsDesc = prometheus.NewDesc(
"namedprocess_scrape_errors",
"general scrape errors: no proc metrics collected during a cycle",
nil,
nil)
scrapeProcReadErrorsDesc = prometheus.NewDesc(
"namedprocess_scrape_procread_errors",
"incremented each time a proc's metrics collection fails",
nil,
nil)
scrapePartialErrorsDesc = prometheus.NewDesc(
"namedprocess_scrape_partial_errors",
"incremented each time a tracked proc's metrics collection fails partially, e.g. unreadable I/O stats",
nil,
nil)
threadWchanDesc = prometheus.NewDesc(
"namedprocess_namegroup_threads_wchan",
"Number of threads in this group waiting on each wchan",
[]string{"groupname", "wchan"},
nil)
threadCountDesc = prometheus.NewDesc(
"namedprocess_namegroup_thread_count",
"Number of threads in this group with same threadname",
[]string{"groupname", "threadname"},
nil)
threadCpuSecsDesc = prometheus.NewDesc(
"namedprocess_namegroup_thread_cpu_seconds_total",
"Cpu user/system usage in seconds",
[]string{"groupname", "threadname", "mode"},
nil)
threadIoBytesDesc = prometheus.NewDesc(
"namedprocess_namegroup_thread_io_bytes_total",
"number of bytes read/written by these threads",
[]string{"groupname", "threadname", "iomode"},
nil)
threadMajorPageFaultsDesc = prometheus.NewDesc(
"namedprocess_namegroup_thread_major_page_faults_total",
"Major page faults for these threads",
[]string{"groupname", "threadname"},
nil)
threadMinorPageFaultsDesc = prometheus.NewDesc(
"namedprocess_namegroup_thread_minor_page_faults_total",
"Minor page faults for these threads",
[]string{"groupname", "threadname"},
nil)
threadContextSwitchesDesc = prometheus.NewDesc(
"namedprocess_namegroup_thread_context_switches_total",
"Context switches for these threads",
[]string{"groupname", "threadname", "ctxswitchtype"},
nil)
)
type (
scrapeRequest struct {
results chan<- prometheus.Metric
done chan struct{}
}
ProcessCollectorOption struct {
ProcFSPath string
Children bool
Threads bool
GatherSMaps bool
Namer common.MatchNamer
Recheck bool
RecheckTimeLimit time.Duration
Debug bool
RemoveEmptyGroups bool
}
NamedProcessCollector struct {
scrapeChan chan scrapeRequest
*proc.Grouper
threads bool
smaps bool
source proc.Source
scrapeErrors int
scrapeProcReadErrors int
scrapePartialErrors int
debug bool
}
)
func NewProcessCollector(options ProcessCollectorOption) (*NamedProcessCollector, error) {
fs, err := proc.NewFS(options.ProcFSPath, options.Debug)
if err != nil {
return nil, err
}
fs.GatherSMaps = options.GatherSMaps
p := &NamedProcessCollector{
scrapeChan: make(chan scrapeRequest),
Grouper: proc.NewGrouper(options.Namer, options.Children, options.Threads, options.Recheck, options.RecheckTimeLimit, options.Debug, options.RemoveEmptyGroups),
source: fs,
threads: options.Threads,
smaps: options.GatherSMaps,
debug: options.Debug,
}
colErrs, _, err := p.Update(p.source.AllProcs())
if err != nil {
if options.Debug {
log.Print(err)
}
return nil, err
}
p.scrapePartialErrors += colErrs.Partial
p.scrapeProcReadErrors += colErrs.Read
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 <- membytesDesc
ch <- openFDsDesc
ch <- worstFDRatioDesc
ch <- startTimeDesc
ch <- majorPageFaultsDesc
ch <- minorPageFaultsDesc
ch <- contextSwitchesDesc
ch <- numThreadsDesc
ch <- statesDesc
ch <- scrapeErrorsDesc
ch <- scrapeProcReadErrorsDesc
ch <- scrapePartialErrorsDesc
ch <- threadWchanDesc
ch <- threadCountDesc
ch <- threadCpuSecsDesc
ch <- threadIoBytesDesc
ch <- threadMajorPageFaultsDesc
ch <- threadMinorPageFaultsDesc
ch <- threadContextSwitchesDesc
}
// 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.scrape(ch)
req.done <- struct{}{}
}
}
func (p *NamedProcessCollector) scrape(ch chan<- prometheus.Metric) {
permErrs, groups, err := p.Update(p.source.AllProcs())
p.scrapePartialErrors += permErrs.Partial
if err != nil {
p.scrapeErrors++
log.Printf("error reading procs: %v", err)
} else {
for gname, gcounts := range groups {
ch <- prometheus.MustNewConstMetric(numprocsDesc,
prometheus.GaugeValue, float64(gcounts.Procs), gname)
ch <- prometheus.MustNewConstMetric(membytesDesc,
prometheus.GaugeValue, float64(gcounts.Memory.ResidentBytes), gname, "resident")
ch <- prometheus.MustNewConstMetric(membytesDesc,
prometheus.GaugeValue, float64(gcounts.Memory.VirtualBytes), gname, "virtual")
ch <- prometheus.MustNewConstMetric(membytesDesc,
prometheus.GaugeValue, float64(gcounts.Memory.VmSwapBytes), gname, "swapped")
ch <- prometheus.MustNewConstMetric(startTimeDesc,
prometheus.GaugeValue, float64(gcounts.OldestStartTime.Unix()), gname)
ch <- prometheus.MustNewConstMetric(openFDsDesc,
prometheus.GaugeValue, float64(gcounts.OpenFDs), gname)
ch <- prometheus.MustNewConstMetric(worstFDRatioDesc,
prometheus.GaugeValue, float64(gcounts.WorstFDratio), gname)
ch <- prometheus.MustNewConstMetric(cpuSecsDesc,
prometheus.CounterValue, gcounts.CPUUserTime, gname, "user")
ch <- prometheus.MustNewConstMetric(cpuSecsDesc,
prometheus.CounterValue, gcounts.CPUSystemTime, gname, "system")
ch <- prometheus.MustNewConstMetric(readBytesDesc,
prometheus.CounterValue, float64(gcounts.ReadBytes), gname)
ch <- prometheus.MustNewConstMetric(writeBytesDesc,
prometheus.CounterValue, float64(gcounts.WriteBytes), gname)
ch <- prometheus.MustNewConstMetric(majorPageFaultsDesc,
prometheus.CounterValue, float64(gcounts.MajorPageFaults), gname)
ch <- prometheus.MustNewConstMetric(minorPageFaultsDesc,
prometheus.CounterValue, float64(gcounts.MinorPageFaults), gname)
ch <- prometheus.MustNewConstMetric(contextSwitchesDesc,
prometheus.CounterValue, float64(gcounts.CtxSwitchVoluntary), gname, "voluntary")
ch <- prometheus.MustNewConstMetric(contextSwitchesDesc,
prometheus.CounterValue, float64(gcounts.CtxSwitchNonvoluntary), gname, "nonvoluntary")
ch <- prometheus.MustNewConstMetric(numThreadsDesc,
prometheus.GaugeValue, float64(gcounts.NumThreads), gname)
ch <- prometheus.MustNewConstMetric(statesDesc,
prometheus.GaugeValue, float64(gcounts.States.Running), gname, "Running")
ch <- prometheus.MustNewConstMetric(statesDesc,
prometheus.GaugeValue, float64(gcounts.States.Sleeping), gname, "Sleeping")
ch <- prometheus.MustNewConstMetric(statesDesc,
prometheus.GaugeValue, float64(gcounts.States.Waiting), gname, "Waiting")
ch <- prometheus.MustNewConstMetric(statesDesc,
prometheus.GaugeValue, float64(gcounts.States.Zombie), gname, "Zombie")
ch <- prometheus.MustNewConstMetric(statesDesc,
prometheus.GaugeValue, float64(gcounts.States.Other), gname, "Other")
for wchan, count := range gcounts.Wchans {
ch <- prometheus.MustNewConstMetric(threadWchanDesc,
prometheus.GaugeValue, float64(count), gname, wchan)
}
if p.smaps {
ch <- prometheus.MustNewConstMetric(membytesDesc,
prometheus.GaugeValue, float64(gcounts.Memory.ProportionalBytes), gname, "proportionalResident")
ch <- prometheus.MustNewConstMetric(membytesDesc,
prometheus.GaugeValue, float64(gcounts.Memory.ProportionalSwapBytes), gname, "proportionalSwapped")
}
if p.threads {
for _, thr := range gcounts.Threads {
ch <- prometheus.MustNewConstMetric(threadCountDesc,
prometheus.GaugeValue, float64(thr.NumThreads),
gname, thr.Name)
ch <- prometheus.MustNewConstMetric(threadCpuSecsDesc,
prometheus.CounterValue, float64(thr.CPUUserTime),
gname, thr.Name, "user")
ch <- prometheus.MustNewConstMetric(threadCpuSecsDesc,
prometheus.CounterValue, float64(thr.CPUSystemTime),
gname, thr.Name, "system")
ch <- prometheus.MustNewConstMetric(threadIoBytesDesc,
prometheus.CounterValue, float64(thr.ReadBytes),
gname, thr.Name, "read")
ch <- prometheus.MustNewConstMetric(threadIoBytesDesc,
prometheus.CounterValue, float64(thr.WriteBytes),
gname, thr.Name, "write")
ch <- prometheus.MustNewConstMetric(threadMajorPageFaultsDesc,
prometheus.CounterValue, float64(thr.MajorPageFaults),
gname, thr.Name)
ch <- prometheus.MustNewConstMetric(threadMinorPageFaultsDesc,
prometheus.CounterValue, float64(thr.MinorPageFaults),
gname, thr.Name)
ch <- prometheus.MustNewConstMetric(threadContextSwitchesDesc,
prometheus.CounterValue, float64(thr.CtxSwitchVoluntary),
gname, thr.Name, "voluntary")
ch <- prometheus.MustNewConstMetric(threadContextSwitchesDesc,
prometheus.CounterValue, float64(thr.CtxSwitchNonvoluntary),
gname, thr.Name, "nonvoluntary")
}
}
}
}
ch <- prometheus.MustNewConstMetric(scrapeErrorsDesc,
prometheus.CounterValue, float64(p.scrapeErrors))
ch <- prometheus.MustNewConstMetric(scrapeProcReadErrorsDesc,
prometheus.CounterValue, float64(p.scrapeProcReadErrors))
ch <- prometheus.MustNewConstMetric(scrapePartialErrorsDesc,
prometheus.CounterValue, float64(p.scrapePartialErrors))
}