icinga2/plugins/check_perfmon.cpp

388 lines
11 KiB
C++

/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
#include "plugins/thresholds.hpp"
#include <boost/program_options.hpp>
#include <iostream>
#include <vector>
#include <windows.h>
#include <pdh.h>
#include <pdhmsg.h>
#include <shlwapi.h>
#define VERSION 1.0
namespace po = boost::program_options;
struct printInfoStruct
{
threshold tWarn;
threshold tCrit;
std::wstring wsFullPath;
double dValue;
DWORD dwPerformanceWait = 1000;
DWORD dwRequestedType = PDH_FMT_DOUBLE;
};
static bool parseArguments(const int ac, WCHAR **av, po::variables_map& vm, printInfoStruct& printInfo)
{
WCHAR szNamePath[MAX_PATH + 1];
GetModuleFileName(NULL, szNamePath, MAX_PATH);
WCHAR *szProgName = PathFindFileName(szNamePath);
po::options_description desc("Options");
desc.add_options()
("help,h", "Print help page and exit")
("version,V", "Print version and exit")
("warning,w", po::wvalue<std::wstring>(), "Warning thershold")
("critical,c", po::wvalue<std::wstring>(), "Critical threshold")
("performance-counter,P", po::wvalue<std::wstring>(), "The performance counter string to use")
("performance-wait", po::value<DWORD>(), "Sleep in milliseconds between the two perfomance querries (Default: 1000ms)")
("fmt-countertype", po::wvalue<std::wstring>(), "Value type of counter: 'double'(default), 'long', 'int64'")
("print-objects", "Prints all available objects to console")
("print-object-info", "Prints all available instances and counters of --performance-counter, do not use a full perfomance counter string here")
("perf-syntax", po::wvalue<std::wstring>(), "Use this string as name for the performance counter (graphite compatibility)")
;
po::wcommand_line_parser parser(ac, av);
try {
po::store(
parser
.options(desc)
.style(
po::command_line_style::unix_style |
po::command_line_style::allow_long_disguise)
.run(),
vm);
vm.notify();
} catch (const std::exception& e) {
std::cout << e.what() << '\n' << desc << '\n';
return false;
}
if (vm.count("version")) {
std::wcout << "Version: " << VERSION << '\n';
return false;
}
if (vm.count("help")) {
std::wcout << szProgName << " Help\n\tVersion: " << VERSION << '\n';
wprintf(
L"%s runs a check against a performance counter.\n"
L"You can use the following options to define its behaviour:\n\n", szProgName);
std::cout << desc;
wprintf(
L"\nIt will then output a string looking something like this:\n\n"
L"\tPERFMON CRITICAL \"\\Processor(_Total)\\%% Idle Time\" = 40.34 | "
L"perfmon=40.34;20;40;; \"\\Processor(_Total)\\%% Idle Time\"=40.34\n\n"
L"\"tPERFMON\" being the type of the check, \"CRITICAL\" the returned status\n"
L"and \"40.34\" is the performance counters value.\n"
L"%s' exit codes denote the following:\n"
L" 0\tOK,\n\tNo Thresholds were exceeded\n"
L" 1\tWARNING,\n\tThe warning was broken, but not the critical threshold\n"
L" 2\tCRITICAL,\n\tThe critical threshold was broken\n"
L" 3\tUNKNOWN, \n\tNo check could be performed\n\n"
, szProgName);
return false;
}
if (vm.count("warning")) {
try {
printInfo.tWarn = threshold(vm["warning"].as<std::wstring>());
} catch (const std::invalid_argument& e) {
std::wcout << e.what() << '\n';
return false;
}
}
if (vm.count("critical")) {
try {
printInfo.tCrit = threshold(vm["critical"].as<std::wstring>());
} catch (const std::invalid_argument& e) {
std::wcout << e.what() << '\n';
return false;
}
}
if (vm.count("fmt-countertype")) {
if (!vm["fmt-countertype"].as<std::wstring>().compare(L"int64"))
printInfo.dwRequestedType = PDH_FMT_LARGE;
else if (!vm["fmt-countertype"].as<std::wstring>().compare(L"long"))
printInfo.dwRequestedType = PDH_FMT_LONG;
else if (vm["fmt-countertype"].as<std::wstring>().compare(L"double")) {
std::wcout << "Unknown value type " << vm["fmt-countertype"].as<std::wstring>() << '\n';
return false;
}
}
if (vm.count("performance-counter"))
printInfo.wsFullPath = vm["performance-counter"].as<std::wstring>();
if (vm.count("performance-wait"))
printInfo.dwPerformanceWait = vm["performance-wait"].as<DWORD>();
return true;
}
static bool getInstancesAndCountersOfObject(const std::wstring& wsObject,
std::vector<std::wstring>& vecInstances, std::vector<std::wstring>& vecCounters)
{
DWORD dwCounterListLength = 0, dwInstanceListLength = 0;
if (PdhEnumObjectItems(NULL, NULL, wsObject.c_str(),
NULL, &dwCounterListLength, NULL,
&dwInstanceListLength, PERF_DETAIL_WIZARD, 0) != PDH_MORE_DATA)
return false;
std::vector<WCHAR> mszCounterList(dwCounterListLength + 1);
std::vector<WCHAR> mszInstanceList(dwInstanceListLength + 1);
if (FAILED(PdhEnumObjectItems(NULL, NULL, wsObject.c_str(),
mszCounterList.data(), &dwCounterListLength, mszInstanceList.data(),
&dwInstanceListLength, PERF_DETAIL_WIZARD, 0))) {
return false;
}
if (dwInstanceListLength) {
std::wstringstream wssInstanceName;
// XXX: is the "- 1" correct?
for (DWORD c = 0; c < dwInstanceListLength - 1; ++c) {
if (mszInstanceList[c])
wssInstanceName << mszInstanceList[c];
else {
vecInstances.push_back(wssInstanceName.str());
wssInstanceName.str(L"");
}
}
}
if (dwCounterListLength) {
std::wstringstream wssCounterName;
// XXX: is the "- 1" correct?
for (DWORD c = 0; c < dwCounterListLength - 1; ++c) {
if (mszCounterList[c])
wssCounterName << mszCounterList[c];
else {
vecCounters.push_back(wssCounterName.str());
wssCounterName.str(L"");
}
}
}
return true;
}
static void printPDHError(PDH_STATUS status)
{
HMODULE hPdhLibrary = NULL;
LPWSTR pMessage = NULL;
hPdhLibrary = LoadLibrary(L"pdh.dll");
if (!hPdhLibrary) {
std::wcout << "LoadLibrary failed with " << GetLastError() << '\n';
return;
}
if (!FormatMessage(FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_ARGUMENT_ARRAY,
hPdhLibrary, status, 0, (LPWSTR)&pMessage, 0, NULL)) {
FreeLibrary(hPdhLibrary);
std::wcout << "Format message failed with " << std::hex << GetLastError() << '\n';
return;
}
FreeLibrary(hPdhLibrary);
std::wcout << pMessage << '\n';
LocalFree(pMessage);
}
static void printObjects()
{
DWORD dwBufferLength = 0;
PDH_STATUS status = PdhEnumObjects(NULL, NULL, NULL,
&dwBufferLength, PERF_DETAIL_WIZARD, FALSE);
//HEX HEX! Only a Magicians gets all the info he wants, and only Microsoft knows what that means
if (status != PDH_MORE_DATA) {
printPDHError(status);
return;
}
std::vector<WCHAR> mszObjectList(dwBufferLength + 2);
status = PdhEnumObjects(NULL, NULL, mszObjectList.data(),
&dwBufferLength, PERF_DETAIL_WIZARD, FALSE);
if (FAILED(status)) {
printPDHError(status);
return;
}
DWORD c = 0;
while (++c < dwBufferLength) {
if (mszObjectList[c] == '\0')
std::wcout << '\n';
else
std::wcout << mszObjectList[c];
}
}
static void printObjectInfo(const printInfoStruct& pI)
{
if (pI.wsFullPath.empty()) {
std::wcout << "No object given!\n";
return;
}
std::vector<std::wstring> vecInstances, vecCounters;
if (!getInstancesAndCountersOfObject(pI.wsFullPath, vecInstances, vecCounters)) {
std::wcout << "Could not enumerate instances and counters of " << pI.wsFullPath << '\n'
<< "Make sure it exists!\n";
return;
}
std::wcout << "Instances of " << pI.wsFullPath << ":\n";
if (vecInstances.empty())
std::wcout << "> Has no instances\n";
else {
for (const auto& instance : vecInstances)
std::wcout << "> " << instance << '\n';
}
std::wcout << std::endl;
std::wcout << "Performance Counters of " << pI.wsFullPath << ":\n";
if (vecCounters.empty())
std::wcout << "> Has no counters\n";
else {
for (const auto& counter : vecCounters)
std::wcout << "> " << counter << "\n";
}
std::wcout << std::endl;
}
bool QueryPerfData(printInfoStruct& pI)
{
PDH_HQUERY hQuery = NULL;
PDH_HCOUNTER hCounter = NULL;
DWORD dwBufferSize = 0, dwItemCount = 0;
if (pI.wsFullPath.empty()) {
std::wcout << "No performance counter path given!\n";
return false;
}
PDH_FMT_COUNTERVALUE_ITEM *pDisplayValues = NULL;
PDH_STATUS status = PdhOpenQuery(NULL, NULL, &hQuery);
if (FAILED(status))
goto die;
status = PdhAddEnglishCounter(hQuery, pI.wsFullPath.c_str(), NULL, &hCounter);
if (FAILED(status))
status = PdhAddCounter(hQuery, pI.wsFullPath.c_str(), NULL, &hCounter);
if (FAILED(status))
goto die;
status = PdhCollectQueryData(hQuery);
if (FAILED(status))
goto die;
/*
* Most counters need two queries to provide a value.
* Those which need only one will return the second.
*/
Sleep(pI.dwPerformanceWait);
status = PdhCollectQueryData(hQuery);
if (FAILED(status))
goto die;
status = PdhGetFormattedCounterArray(hCounter, pI.dwRequestedType, &dwBufferSize, &dwItemCount, NULL);
if (status != PDH_MORE_DATA)
goto die;
pDisplayValues = reinterpret_cast<PDH_FMT_COUNTERVALUE_ITEM*>(new BYTE[dwBufferSize]);
status = PdhGetFormattedCounterArray(hCounter, pI.dwRequestedType, &dwBufferSize, &dwItemCount, pDisplayValues);
if (FAILED(status))
goto die;
switch (pI.dwRequestedType) {
case (PDH_FMT_LONG):
pI.dValue = pDisplayValues[0].FmtValue.longValue;
break;
case (PDH_FMT_LARGE):
pI.dValue = (double) pDisplayValues[0].FmtValue.largeValue;
break;
default:
pI.dValue = pDisplayValues[0].FmtValue.doubleValue;
break;
}
delete[]pDisplayValues;
return true;
die:
printPDHError(status);
delete[]pDisplayValues;
return false;
}
static int printOutput(const po::variables_map& vm, printInfoStruct& pi)
{
std::wstringstream wssPerfData;
if (vm.count("perf-syntax"))
wssPerfData << "'" << vm["perf-syntax"].as<std::wstring>() << "'=";
else
wssPerfData << "'" << pi.wsFullPath << "'=";
wssPerfData << pi.dValue << ';' << pi.tWarn.pString() << ';' << pi.tCrit.pString() << ";;";
if (pi.tCrit.rend(pi.dValue)) {
std::wcout << "PERFMON CRITICAL for '" << (vm.count("perf-syntax") ? vm["perf-syntax"].as<std::wstring>() : pi.wsFullPath)
<< "' = " << pi.dValue << " | " << wssPerfData.str() << "\n";
return 2;
}
if (pi.tWarn.rend(pi.dValue)) {
std::wcout << "PERFMON WARNING for '" << (vm.count("perf-syntax") ? vm["perf-syntax"].as<std::wstring>() : pi.wsFullPath)
<< "' = " << pi.dValue << " | " << wssPerfData.str() << "\n";
return 1;
}
std::wcout << "PERFMON OK for '" << (vm.count("perf-syntax") ? vm["perf-syntax"].as<std::wstring>() : pi.wsFullPath)
<< "' = " << pi.dValue << " | " << wssPerfData.str() << "\n";
return 0;
}
int wmain(int argc, WCHAR **argv)
{
po::variables_map variables_map;
printInfoStruct stPrintInfo;
if (!parseArguments(argc, argv, variables_map, stPrintInfo))
return 3;
if (variables_map.count("print-objects")) {
printObjects();
return 0;
}
if (variables_map.count("print-object-info")) {
printObjectInfo(stPrintInfo);
return 0;
}
if (QueryPerfData(stPrintInfo))
return printOutput(variables_map, stPrintInfo);
else
return 3;
}