ClusterCockpit/cc-metric-collector
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Fix startup error of iostat collector

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This commit is contained in:
Thomas Roehl
2025-10-20 17:03:55 +02:00
parent 6a4ad067ac
commit b6ac62676f
1 changed files with 24 additions and 10 deletions
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34
collectors/iostatMetric.go
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@@ -20,18 +20,17 @@ import (
lp "github.com/ClusterCockpit/cc-lib/ccMessage" lp "github.com/ClusterCockpit/cc-lib/ccMessage"
) )
// Konstante für den Pfad zu /proc/diskstats
const IOSTATFILE = `/proc/diskstats` const IOSTATFILE = `/proc/diskstats`
type IOstatCollectorConfig struct { type IOstatCollectorConfig struct {
ExcludeMetrics []string `json:"exclude_metrics,omitempty"` ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
// Neues Feld zum Ausschließen von Devices per JSON-Konfiguration
ExcludeDevices []string `json:"exclude_devices,omitempty"` ExcludeDevices []string `json:"exclude_devices,omitempty"`
} }
type IOstatCollectorEntry struct { type IOstatCollectorEntry struct {
lastValues map[string]int64 currentValues map[string]int64
tags map[string]string lastValues map[string]int64
tags map[string]string
} }
type IOstatCollector struct { type IOstatCollector struct {
@@ -105,16 +104,27 @@ func (m *IOstatCollector) Init(config json.RawMessage) error {
if _, skip := stringArrayContains(m.config.ExcludeDevices, device); skip { if _, skip := stringArrayContains(m.config.ExcludeDevices, device); skip {
continue continue
} }
values := make(map[string]int64) currentValues := make(map[string]int64)
lastValues := make(map[string]int64)
for m := range m.matches { for m := range m.matches {
values[m] = 0 currentValues[m] = 0
lastValues[m] = 0
}
for name, idx := range m.matches {
if idx < len(linefields) {
if value, err := strconv.ParseInt(linefields[idx], 0, 64); err == nil {
currentValues[name] = value
lastValues[name] = value // Set last to current for first read
}
}
} }
m.devices[device] = IOstatCollectorEntry{ m.devices[device] = IOstatCollectorEntry{
tags: map[string]string{ tags: map[string]string{
"device": device, "device": device,
"type": "node", "type": "node",
}, },
lastValues: values, currentValues: currentValues,
lastValues: lastValues,
} }
} }
m.init = true m.init = true
@@ -153,18 +163,22 @@ func (m *IOstatCollector) Read(interval time.Duration, output chan lp.CCMessage)
if _, ok := m.devices[device]; !ok { if _, ok := m.devices[device]; !ok {
continue continue
} }
// Update current and last values
entry := m.devices[device] entry := m.devices[device]
for name, idx := range m.matches { for name, idx := range m.matches {
if idx < len(linefields) { if idx < len(linefields) {
x, err := strconv.ParseInt(linefields[idx], 0, 64) x, err := strconv.ParseInt(linefields[idx], 0, 64)
if err == nil { if err == nil {
diff := x - entry.lastValues[name] // Calculate difference using previous current and new value
y, err := lp.NewMessage(name, entry.tags, m.meta, map[string]interface{}{"value": int(diff)}, time.Now()) diff := x - entry.currentValues[name]
y, err := lp.NewMetric(name, entry.tags, m.meta, int(diff), time.Now())
if err == nil { if err == nil {
output <- y output <- y
} }
// Update last to previous current, and current to new value
entry.lastValues[name] = entry.currentValues[name]
entry.currentValues[name] = x
} }
entry.lastValues[name] = x
} }
} }
m.devices[device] = entry m.devices[device] = entry