266 lines
7.3 KiB
Go
266 lines
7.3 KiB
Go
// +build windows
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package win_perf_counters
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import (
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"errors"
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"fmt"
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"strings"
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"unsafe"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/inputs"
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)
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var sampleConfig = `
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## By default this plugin returns basic CPU and Disk statistics.
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## See the README file for more examples.
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## Uncomment examples below or write your own as you see fit. If the system
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## being polled for data does not have the Object at startup of the Telegraf
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## agent, it will not be gathered.
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## Settings:
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# PrintValid = false # Print All matching performance counters
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[[inputs.win_perf_counters.object]]
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# Processor usage, alternative to native, reports on a per core.
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ObjectName = "Processor"
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Instances = ["*"]
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Counters = [
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"%% Idle Time", "%% Interrupt Time",
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"%% Privileged Time", "%% User Time",
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"%% Processor Time"
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]
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Measurement = "win_cpu"
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# Set to true to include _Total instance when querying for all (*).
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# IncludeTotal=false
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# Print out when the performance counter is missing from object, counter or instance.
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# WarnOnMissing = false
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[[inputs.win_perf_counters.object]]
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# Disk times and queues
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ObjectName = "LogicalDisk"
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Instances = ["*"]
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Counters = [
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"%% Idle Time", "%% Disk Time","%% Disk Read Time",
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"%% Disk Write Time", "%% User Time", "Current Disk Queue Length"
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]
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Measurement = "win_disk"
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[[inputs.win_perf_counters.object]]
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ObjectName = "System"
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Counters = ["Context Switches/sec","System Calls/sec"]
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Instances = ["------"]
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Measurement = "win_system"
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[[inputs.win_perf_counters.object]]
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# Example query where the Instance portion must be removed to get data back,
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# such as from the Memory object.
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ObjectName = "Memory"
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Counters = [
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"Available Bytes", "Cache Faults/sec", "Demand Zero Faults/sec",
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"Page Faults/sec", "Pages/sec", "Transition Faults/sec",
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"Pool Nonpaged Bytes", "Pool Paged Bytes"
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]
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Instances = ["------"] # Use 6 x - to remove the Instance bit from the query.
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Measurement = "win_mem"
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`
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type Win_PerfCounters struct {
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PrintValid bool
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PreVistaSupport bool
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Object []perfobject
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configParsed bool
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itemCache []*item
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}
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type perfobject struct {
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ObjectName string
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Counters []string
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Instances []string
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Measurement string
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WarnOnMissing bool
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FailOnMissing bool
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IncludeTotal bool
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}
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type item struct {
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query string
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objectName string
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counter string
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instance string
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measurement string
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include_total bool
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handle PDH_HQUERY
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counterHandle PDH_HCOUNTER
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}
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var sanitizedChars = strings.NewReplacer("/sec", "_persec", "/Sec", "_persec",
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" ", "_", "%", "Percent", `\`, "")
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func (m *Win_PerfCounters) AddItem(query string, objectName string, counter string, instance string,
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measurement string, include_total bool) error {
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var handle PDH_HQUERY
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var counterHandle PDH_HCOUNTER
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ret := PdhOpenQuery(0, 0, &handle)
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if m.PreVistaSupport {
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ret = PdhAddCounter(handle, query, 0, &counterHandle)
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} else {
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ret = PdhAddEnglishCounter(handle, query, 0, &counterHandle)
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}
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// Call PdhCollectQueryData one time to check existence of the counter
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ret = PdhCollectQueryData(handle)
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if ret != ERROR_SUCCESS {
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PdhCloseQuery(handle)
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return errors.New(PdhFormatError(ret))
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}
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newItem := &item{query, objectName, counter, instance, measurement,
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include_total, handle, counterHandle}
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m.itemCache = append(m.itemCache, newItem)
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return nil
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}
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func (m *Win_PerfCounters) Description() string {
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return "Input plugin to query Performance Counters on Windows operating systems"
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}
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func (m *Win_PerfCounters) SampleConfig() string {
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return sampleConfig
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}
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func (m *Win_PerfCounters) ParseConfig() error {
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var query string
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if len(m.Object) > 0 {
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for _, PerfObject := range m.Object {
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for _, counter := range PerfObject.Counters {
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for _, instance := range PerfObject.Instances {
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objectname := PerfObject.ObjectName
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if instance == "------" {
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query = "\\" + objectname + "\\" + counter
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} else {
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query = "\\" + objectname + "(" + instance + ")\\" + counter
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}
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err := m.AddItem(query, objectname, counter, instance,
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PerfObject.Measurement, PerfObject.IncludeTotal)
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if err == nil {
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if m.PrintValid {
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fmt.Printf("Valid: %s\n", query)
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}
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} else {
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if PerfObject.FailOnMissing || PerfObject.WarnOnMissing {
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fmt.Printf("Invalid query: '%s'. Error: %s", query, err.Error())
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}
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if PerfObject.FailOnMissing {
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return err
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}
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}
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}
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}
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}
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return nil
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} else {
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err := errors.New("No performance objects configured!")
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return err
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}
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}
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func (m *Win_PerfCounters) GetParsedItemsForTesting() []*item {
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return m.itemCache
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}
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func (m *Win_PerfCounters) Gather(acc telegraf.Accumulator) error {
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// Parse the config once
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if !m.configParsed {
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err := m.ParseConfig()
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m.configParsed = true
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if err != nil {
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return err
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}
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}
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var bufSize uint32
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var bufCount uint32
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var size uint32 = uint32(unsafe.Sizeof(PDH_FMT_COUNTERVALUE_ITEM_DOUBLE{}))
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var emptyBuf [1]PDH_FMT_COUNTERVALUE_ITEM_DOUBLE // need at least 1 addressable null ptr.
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// For iterate over the known metrics and get the samples.
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for _, metric := range m.itemCache {
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// collect
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ret := PdhCollectQueryData(metric.handle)
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if ret == ERROR_SUCCESS {
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ret = PdhGetFormattedCounterArrayDouble(metric.counterHandle, &bufSize,
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&bufCount, &emptyBuf[0]) // uses null ptr here according to MSDN.
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if ret == PDH_MORE_DATA {
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filledBuf := make([]PDH_FMT_COUNTERVALUE_ITEM_DOUBLE, bufCount*size)
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if len(filledBuf) == 0 {
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continue
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}
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ret = PdhGetFormattedCounterArrayDouble(metric.counterHandle,
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&bufSize, &bufCount, &filledBuf[0])
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for i := 0; i < int(bufCount); i++ {
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c := filledBuf[i]
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var s string = UTF16PtrToString(c.SzName)
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var add bool
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if metric.include_total {
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// If IncludeTotal is set, include all.
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add = true
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} else if metric.instance == "*" && !strings.Contains(s, "_Total") {
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// Catch if set to * and that it is not a '*_Total*' instance.
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add = true
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} else if metric.instance == s {
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// Catch if we set it to total or some form of it
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add = true
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} else if strings.Contains(metric.instance, "#") && strings.HasPrefix(metric.instance, s) {
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// If you are using a multiple instance identifier such as "w3wp#1"
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// phd.dll returns only the first 2 characters of the identifier.
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add = true
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s = metric.instance
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} else if metric.instance == "------" {
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add = true
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}
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if add {
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fields := make(map[string]interface{})
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tags := make(map[string]string)
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if s != "" {
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tags["instance"] = s
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}
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tags["objectname"] = metric.objectName
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fields[sanitizedChars.Replace(metric.counter)] =
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float32(c.FmtValue.DoubleValue)
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measurement := sanitizedChars.Replace(metric.measurement)
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if measurement == "" {
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measurement = "win_perf_counters"
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}
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acc.AddFields(measurement, fields, tags)
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}
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}
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filledBuf = nil
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// Need to at least set bufSize to zero, because if not, the function will not
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// return PDH_MORE_DATA and will not set the bufSize.
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bufCount = 0
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bufSize = 0
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}
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}
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}
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return nil
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}
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func init() {
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inputs.Add("win_perf_counters", func() telegraf.Input { return &Win_PerfCounters{} })
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}
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