mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2025-04-05 21:25:55 +02:00
113 lines
2.7 KiB
Go
113 lines
2.7 KiB
Go
package collectors
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import (
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"encoding/json"
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"fmt"
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"os"
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"strconv"
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"strings"
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"time"
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lp "github.com/ClusterCockpit/cc-lib/ccMessage"
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cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
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)
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// LoadavgCollector collects:
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// * load average of last 1, 5 & 15 minutes
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// * number of processes currently runnable
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// * total number of processes in system
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//
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// See: https://www.kernel.org/doc/html/latest/filesystems/proc.html
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const LOADAVGFILE = "/proc/loadavg"
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type LoadavgCollector struct {
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metricCollector
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tags map[string]string
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config struct {
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ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
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OnlyMetrics []string `json:"only_metrics,omitempty"`
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}
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}
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func (m *LoadavgCollector) shouldOutput(metricName string) bool {
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if len(m.config.OnlyMetrics) > 0 {
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for _, n := range m.config.OnlyMetrics {
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if n == metricName {
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return true
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}
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}
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return false
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}
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for _, n := range m.config.ExcludeMetrics {
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if n == metricName {
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return false
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}
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}
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return true
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}
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func (m *LoadavgCollector) Init(config json.RawMessage) error {
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m.name = "LoadavgCollector"
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m.parallel = true
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m.setup()
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if len(config) > 0 {
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if err := json.Unmarshal(config, &m.config); err != nil {
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return err
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}
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}
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m.meta = map[string]string{"source": m.name, "group": "LOAD"}
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m.tags = map[string]string{"type": "node"}
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m.init = true
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return nil
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}
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func (m *LoadavgCollector) Read(interval time.Duration, output chan lp.CCMessage) {
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if !m.init {
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return
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}
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buffer, err := os.ReadFile(LOADAVGFILE)
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if err != nil {
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cclog.ComponentError(m.name, fmt.Sprintf("Read(): Failed to read file '%s': %v", LOADAVGFILE, err))
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return
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}
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now := time.Now()
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ls := strings.Split(string(buffer), " ")
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// Load metrics
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loadMetrics := []string{"load_one", "load_five", "load_fifteen"}
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for i, name := range loadMetrics {
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x, err := strconv.ParseFloat(ls[i], 64)
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if err != nil {
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cclog.ComponentError(m.name, fmt.Sprintf("Read(): Failed to convert '%s' to float64: %v", ls[i], err))
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continue
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}
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if m.shouldOutput(name) {
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y, err := lp.NewMessage(name, m.tags, m.meta, map[string]interface{}{"value": x}, now)
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if err == nil {
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output <- y
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}
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}
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}
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// Process metrics
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lv := strings.Split(ls[3], `/`)
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procMetrics := []string{"proc_run", "proc_total"}
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for i, name := range procMetrics {
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x, err := strconv.ParseInt(lv[i], 10, 64)
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if err != nil {
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cclog.ComponentError(m.name, fmt.Sprintf("Read(): Failed to convert '%s' to int64: %v", lv[i], err))
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continue
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}
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if m.shouldOutput(name) {
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y, err := lp.NewMessage(name, m.tags, m.meta, map[string]interface{}{"value": x}, now)
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if err == nil {
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output <- y
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}
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}
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}
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}
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func (m *LoadavgCollector) Close() {
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m.init = false
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}
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