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feat: Support OpenMetrics (#1772)

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Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>
This commit is contained in:
Jan-Otto Kröpke
2024-11-26 19:43:52 +01:00
committed by GitHub
parent 1a4c6c5ce7
commit c8eeb595c0
9 changed files with 89 additions and 64 deletions
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32
internal/perfdata/collector.go
View File

@@ -193,6 +193,13 @@ func (c *Collector) Collect() (CounterValues, error) {
}
func (c *Collector) collectRoutine() {
var (
itemCount uint32
bytesNeeded uint32
)
buf := make([]byte, 1)
for range c.collectCh {
if ret := PdhCollectQueryData(c.handle); ret != ErrorSuccess {
c.counterValuesCh <- nil
@@ -207,25 +214,24 @@ func (c *Collector) collectRoutine() {
for _, counter := range c.counters {
for _, instance := range counter.Instances {
// Get the info with the current buffer size
var itemCount uint32
bytesNeeded = uint32(cap(buf))
// Get the info with the current buffer size
bufLen := uint32(0)
for {
ret := PdhGetRawCounterArray(instance, &bytesNeeded, &itemCount, &buf[0])
ret := PdhGetRawCounterArray(instance, &bufLen, &itemCount, nil)
if ret != PdhMoreData {
return nil, fmt.Errorf("PdhGetRawCounterArray: %w", NewPdhError(ret))
}
if ret == ErrorSuccess {
break
}
buf := make([]byte, bufLen)
ret = PdhGetRawCounterArray(instance, &bufLen, &itemCount, &buf[0])
if ret != ErrorSuccess {
if err := NewPdhError(ret); !isKnownCounterDataError(err) {
if err := NewPdhError(ret); ret != PdhMoreData && !isKnownCounterDataError(err) {
return nil, fmt.Errorf("PdhGetRawCounterArray: %w", err)
}
continue
if bytesNeeded <= uint32(cap(buf)) {
return nil, fmt.Errorf("PdhGetRawCounterArray reports buffer too small (%d), but buffer is large enough (%d): %w", uint32(cap(buf)), bytesNeeded, NewPdhError(ret))
}
buf = make([]byte, bytesNeeded)
}
items := unsafe.Slice((*PdhRawCounterItem)(unsafe.Pointer(&buf[0])), itemCount)

2
internal/perfdata/collector_bench_test.go
View File

@@ -61,4 +61,6 @@ func BenchmarkTestCollector(b *testing.B) {
}
performanceData.Close()
b.ReportAllocs()
}