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loadavgMetric.go
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loadavgMetric.go
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package collectors
import (
"encoding/json"
"fmt"
"io/ioutil"
"strconv"
"strings"
"time"
cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
)
//
// LoadavgCollector collects:
// * load average of last 1, 5 & 15 minutes
// * number of processes currently runnable
// * total number of processes in system
//
// See: https://www.kernel.org/doc/html/latest/filesystems/proc.html
//
const LOADAVGFILE = "/proc/loadavg"
type LoadavgCollector struct {
metricCollector
tags map[string]string
load_matches []string
load_skips []bool
proc_matches []string
proc_skips []bool
config struct {
ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
}
}
func (m *LoadavgCollector) Init(config json.RawMessage) error {
m.name = "LoadavgCollector"
m.setup()
if len(config) > 0 {
err := json.Unmarshal(config, &m.config)
if err != nil {
return err
}
}
m.meta = map[string]string{
"source": m.name,
"group": "LOAD"}
m.tags = map[string]string{"type": "node"}
m.load_matches = []string{
"load_one",
"load_five",
"load_fifteen"}
m.load_skips = make([]bool, len(m.load_matches))
m.proc_matches = []string{
"proc_run",
"proc_total"}
m.proc_skips = make([]bool, len(m.proc_matches))
for i, name := range m.load_matches {
_, m.load_skips[i] = stringArrayContains(m.config.ExcludeMetrics, name)
}
for i, name := range m.proc_matches {
_, m.proc_skips[i] = stringArrayContains(m.config.ExcludeMetrics, name)
}
m.init = true
return nil
}
func (m *LoadavgCollector) Read(interval time.Duration, output chan lp.CCMetric) {
if !m.init {
return
}
buffer, err := ioutil.ReadFile(LOADAVGFILE)
if err != nil {
if err != nil {
cclog.ComponentError(
m.name,
fmt.Sprintf("Read(): Failed to read file '%s': %v", LOADAVGFILE, err))
}
return
}
now := time.Now()
// Load metrics
ls := strings.Split(string(buffer), ` `)
for i, name := range m.load_matches {
x, err := strconv.ParseFloat(ls[i], 64)
if err != nil {
cclog.ComponentError(
m.name,
fmt.Sprintf("Read(): Failed to convert '%s' to float64: %v", ls[i], err))
continue
}
if m.load_skips[i] {
continue
}
y, err := lp.New(name, m.tags, m.meta, map[string]interface{}{"value": x}, now)
if err == nil {
output <- y
}
}
// Process metrics
lv := strings.Split(ls[3], `/`)
for i, name := range m.proc_matches {
x, err := strconv.ParseInt(lv[i], 10, 64)
if err != nil {
cclog.ComponentError(
m.name,
fmt.Sprintf("Read(): Failed to convert '%s' to float64: %v", lv[i], err))
continue
}
if m.proc_skips[i] {
continue
}
y, err := lp.New(name, m.tags, m.meta, map[string]interface{}{"value": x}, now)
if err == nil {
output <- y
}
}
}
func (m *LoadavgCollector) Close() {
m.init = false
}