icinga2/icinga-app/icinga.cpp

748 lines
21 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "config/configcompilercontext.hpp"
#include "config/configcompiler.hpp"
#include "config/configitembuilder.hpp"
#include "base/application.hpp"
#include "base/logger.hpp"
#include "base/timer.hpp"
#include "base/utility.hpp"
#include "base/exception.hpp"
#include "base/convert.hpp"
#include "base/scriptvariable.hpp"
#include "base/context.hpp"
#include "config.h"
#include <boost/program_options.hpp>
#include <boost/tuple/tuple.hpp>
#include <boost/foreach.hpp>
#ifndef _WIN32
# include <sys/types.h>
# include <pwd.h>
# include <grp.h>
#endif /* _WIN32 */
using namespace icinga;
namespace po = boost::program_options;
static po::variables_map g_AppParams;
#ifdef _WIN32
SERVICE_STATUS l_SvcStatus;
SERVICE_STATUS_HANDLE l_SvcStatusHandle;
#endif /* _WIN32 */
static String LoadAppType(const String& typeSpec)
{
Log(LogInformation, "icinga-app", "Loading application type: " + typeSpec);
String::SizeType index = typeSpec.FindFirstOf('/');
if (index == String::NPos)
return typeSpec;
String library = typeSpec.SubStr(0, index);
(void) Utility::LoadExtensionLibrary(library);
return typeSpec.SubStr(index + 1);
}
static void IncludeZoneDirRecursive(const String& path)
{
String zoneName = Utility::BaseName(path);
Utility::GlobRecursive(path, "*.conf", boost::bind(&ConfigCompiler::CompileFile, _1, zoneName), GlobFile);
}
static void IncludeNonLocalZone(const String& zonePath)
{
String etcPath = Application::GetZonesDir() + "/" + Utility::BaseName(zonePath);
if (Utility::PathExists(etcPath))
return;
IncludeZoneDirRecursive(zonePath);
}
static bool LoadConfigFiles(const String& appType)
{
ConfigCompilerContext::GetInstance()->Reset();
if (g_AppParams.count("config") > 0) {
BOOST_FOREACH(const String& configPath, g_AppParams["config"].as<std::vector<std::string> >()) {
ConfigCompiler::CompileFile(configPath);
}
}
/* Load cluster config files - this should probably be in libremote but
* unfortunately moving it there is somewhat non-trivial. */
String zonesEtcDir = Application::GetZonesDir();
if (!zonesEtcDir.IsEmpty() && Utility::PathExists(zonesEtcDir))
Utility::Glob(zonesEtcDir + "/*", &IncludeZoneDirRecursive, GlobDirectory);
String zonesVarDir = Application::GetLocalStateDir() + "/lib/icinga2/api/zones";
if (Utility::PathExists(zonesVarDir))
Utility::Glob(zonesVarDir + "/*", &IncludeNonLocalZone, GlobDirectory);
String name, fragment;
BOOST_FOREACH(boost::tie(name, fragment), ConfigFragmentRegistry::GetInstance()->GetItems()) {
ConfigCompiler::CompileText(name, fragment);
}
ConfigItemBuilder::Ptr builder = make_shared<ConfigItemBuilder>();
builder->SetType(appType);
builder->SetName("application");
ConfigItem::Ptr item = builder->Compile();
item->Register();
bool result = ConfigItem::ValidateItems();
int warnings = 0, errors = 0;
BOOST_FOREACH(const ConfigCompilerMessage& message, ConfigCompilerContext::GetInstance()->GetMessages()) {
std::ostringstream locbuf;
ShowCodeFragment(locbuf, message.Location, true);
String location = locbuf.str();
String logmsg;
if (!location.IsEmpty())
logmsg = "Location:\n" + location;
logmsg += String("\nConfig ") + (message.Error ? "error" : "warning") + ": " + message.Text;
if (message.Error) {
Log(LogCritical, "config", logmsg);
errors++;
} else {
Log(LogWarning, "config", logmsg);
warnings++;
}
}
if (warnings > 0 || errors > 0) {
LogSeverity severity;
if (errors == 0)
severity = LogWarning;
else
severity = LogCritical;
Log(severity, "config", Convert::ToString(errors) + " errors, " + Convert::ToString(warnings) + " warnings.");
}
if (!result)
return false;
return true;
}
#ifndef _WIN32
static void SigHupHandler(int)
{
Application::RequestRestart();
}
#endif /* _WIN32 */
static bool Daemonize(void)
{
#ifndef _WIN32
pid_t pid = fork();
if (pid == -1) {
return false;
}
if (pid) {
// systemd requires that the pidfile of the daemon is written before the forking
// process terminates. So wait till either the forked daemon has written a pidfile or died.
int status;
int ret;
pid_t readpid;
do {
Utility::Sleep(0.1);
readpid = Application::ReadPidFile(Application::GetPidPath());
ret = waitpid(pid, &status, WNOHANG);
} while (readpid != pid && ret == 0);
if (ret == pid) {
Log(LogCritical, "icinga-app", "The daemon could not be started. See logfile for details.");
exit(EXIT_FAILURE);
} else if (ret == -1) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("waitpid")
<< boost::errinfo_errno(errno));
}
exit(0);
}
#endif /* _WIN32 */
return true;
}
static bool SetDaemonIO(const String& stderrFile)
{
#ifndef _WIN32
int fdnull = open("/dev/null", O_RDWR);
if (fdnull >= 0) {
if (fdnull != 0)
dup2(fdnull, 0);
if (fdnull != 1)
dup2(fdnull, 1);
if (fdnull > 1)
close(fdnull);
}
const char *errPath = "/dev/null";
if (!stderrFile.IsEmpty())
errPath = stderrFile.CStr();
int fderr = open(errPath, O_WRONLY | O_APPEND);
if (fderr < 0 && errno == ENOENT)
fderr = open(errPath, O_CREAT | O_WRONLY | O_APPEND, 0600);
if (fderr > 0) {
if (fderr != 2)
dup2(fderr, 2);
if (fderr > 2)
close(fderr);
}
pid_t sid = setsid();
if (sid == -1) {
return false;
}
#endif
return true;
}
/**
* Terminate another process and wait till it has ended
*
* @params target PID of the process to end
*/
static void TerminateAndWaitForEnd(pid_t target)
{
#ifndef _WIN32
// allow 30 seconds timeout
double timeout = Utility::GetTime() + 30;
int ret = kill(target, SIGTERM);
while (Utility::GetTime() < timeout && (ret == 0 || errno != ESRCH)) {
Utility::Sleep(0.1);
ret = kill(target, 0);
}
// timeout and the process still seems to live: kill it
if (ret == 0 || errno != ESRCH)
kill(target, SIGKILL);
#else
// TODO: implement this for Win32
#endif /* _WIN32 */
}
int Main(void)
{
int argc = Application::GetArgC();
char **argv = Application::GetArgV();
Application::SetStartTime(Utility::GetTime());
Application::SetResourceLimits();
/* Set thread title. */
Utility::SetThreadName("Main Thread", false);
/* Install exception handlers to make debugging easier. */
Application::InstallExceptionHandlers();
#ifdef _WIN32
bool builtinPaths = true;
HKEY hKey;
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\Icinga Development Team\\ICINGA2", 0,
KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS) {
BYTE pvData[MAX_PATH];
DWORD cbData = sizeof(pvData)-1;
DWORD lType;
if (RegQueryValueEx(hKey, NULL, NULL, &lType, pvData, &cbData) == ERROR_SUCCESS && lType == REG_SZ) {
pvData[cbData] = '\0';
String prefix = (char *)pvData;
Application::DeclarePrefixDir(prefix);
Application::DeclareSysconfDir(prefix + "\\etc");
Application::DeclareLocalStateDir(prefix + "\\var");
Application::DeclarePkgDataDir(prefix + "\\share\\icinga2");
Application::DeclareIncludeConfDir(prefix + "\\share\\icinga2\\include");
builtinPaths = false;
}
RegCloseKey(hKey);
}
if (builtinPaths) {
Log(LogWarning, "icinga-app", "Registry key could not be read. Falling back to built-in paths.");
#endif /* _WIN32 */
Application::DeclarePrefixDir(ICINGA_PREFIX);
Application::DeclareSysconfDir(ICINGA_SYSCONFDIR);
Application::DeclareLocalStateDir(ICINGA_LOCALSTATEDIR);
Application::DeclarePkgDataDir(ICINGA_PKGDATADIR);
Application::DeclareIncludeConfDir(ICINGA_INCLUDECONFDIR);
#ifdef _WIN32
}
#endif /* _WIN32 */
Application::DeclareZonesDir(Application::GetSysconfDir() + "/icinga2/zones.d");
Application::DeclareApplicationType("icinga/IcingaApplication");
po::options_description desc("Supported options");
desc.add_options()
("help", "show this help message")
("version,V", "show version information")
("library,l", po::value<std::vector<std::string> >(), "load a library")
("include,I", po::value<std::vector<std::string> >(), "add include search directory")
("define,D", po::value<std::vector<std::string> >(), "define a constant")
("config,c", po::value<std::vector<std::string> >(), "parse a configuration file")
("no-config,z", "start without a configuration file")
("validate,C", "exit after validating the configuration")
("log-level,x", po::value<std::string>(), "specify the log level for the console log")
("errorlog,e", po::value<std::string>(), "log fatal errors to the specified log file (only works in combination with --daemonize)")
#ifndef _WIN32
("reload-internal", po::value<int>(), "used internally to implement config reload: do not call manually, send SIGHUP instead")
("daemonize,d", "detach from the controlling terminal")
("user,u", po::value<std::string>(), "user to run Icinga as")
("group,g", po::value<std::string>(), "group to run Icinga as")
# ifdef RLIMIT_STACK
("no-stack-rlimit", "don't attempt to set RLIMIT_STACK")
# endif /* RLIMIT_STACK */
#else /* _WIN32 */
("scm", "run as a Windows service (must be the first argument if specified)")
("scm-install", "installs Icinga 2 as a Windows service (must be the first argument if specified")
("scm-uninstall", "uninstalls the Icinga 2 Windows service (must be the first argument if specified")
#endif /* _WIN32 */
;
try {
po::store(po::parse_command_line(argc, argv, desc), g_AppParams);
} catch (const std::exception& ex) {
std::ostringstream msgbuf;
msgbuf << "Error while parsing command-line options: " << ex.what();
Log(LogCritical, "icinga-app", msgbuf.str());
return EXIT_FAILURE;
}
po::notify(g_AppParams);
if (g_AppParams.count("define")) {
BOOST_FOREACH(const String& define, g_AppParams["define"].as<std::vector<std::string> >()) {
String key, value;
size_t pos = define.FindFirstOf('=');
if (pos != String::NPos) {
key = define.SubStr(0, pos);
value = define.SubStr(pos + 1);
} else {
key = define;
value = "1";
}
ScriptVariable::Set(key, value);
}
}
Application::DeclareStatePath(Application::GetLocalStateDir() + "/lib/icinga2/icinga2.state");
Application::DeclarePidPath(Application::GetLocalStateDir() + "/run/icinga2/icinga2.pid");
#ifndef _WIN32
if (g_AppParams.count("group")) {
String group = g_AppParams["group"].as<std::string>();
errno = 0;
struct group *gr = getgrnam(group.CStr());
if (!gr) {
if (errno == 0) {
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid group specified: " + group));
} else {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("getgrnam")
<< boost::errinfo_errno(errno));
}
}
if (setgid(gr->gr_gid) < 0) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("setgid")
<< boost::errinfo_errno(errno));
}
}
if (g_AppParams.count("user")) {
String user = g_AppParams["user"].as<std::string>();
errno = 0;
struct passwd *pw = getpwnam(user.CStr());
if (!pw) {
if (errno == 0) {
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid user specified: " + user));
} else {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("getpwnam")
<< boost::errinfo_errno(errno));
}
}
if (setuid(pw->pw_uid) < 0) {
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("setuid")
<< boost::errinfo_errno(errno));
}
}
#endif /* _WIN32 */
if (g_AppParams.count("log-level")) {
LogSeverity logLevel = Logger::StringToSeverity(g_AppParams["log-level"].as<std::string>());
Logger::SetConsoleLogSeverity(logLevel);
}
if (g_AppParams.count("help") || g_AppParams.count("version")) {
String appName = Utility::BaseName(argv[0]);
if (appName.GetLength() > 3 && appName.SubStr(0, 3) == "lt-")
appName = appName.SubStr(3, appName.GetLength() - 3);
std::cout << appName << " " << "- The Icinga 2 network monitoring daemon.";
if (g_AppParams.count("version")) {
std::cout << " (Version: " << Application::GetVersion() << ")";
std::cout << std::endl
<< "Copyright (c) 2012-2014 Icinga Development Team (http://www.icinga.org)" << std::endl
<< "License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl2.html>" << std::endl
<< "This is free software: you are free to change and redistribute it." << std::endl
<< "There is NO WARRANTY, to the extent permitted by law.";
}
std::cout << std::endl;
if (g_AppParams.count("version"))
return EXIT_SUCCESS;
}
if (g_AppParams.count("help")) {
std::cout << std::endl
<< desc << std::endl
<< "Report bugs at <https://dev.icinga.org/>" << std::endl
<< "Icinga home page: <http://www.icinga.org/>" << std::endl;
return EXIT_SUCCESS;
}
ScriptVariable::Set("UseVfork", true, false, true);
Application::MakeVariablesConstant();
Log(LogInformation, "icinga-app", "Icinga application loader (version: " + Application::GetVersion() + ")");
String appType = LoadAppType(Application::GetApplicationType());
if (g_AppParams.count("library")) {
BOOST_FOREACH(const String& libraryName, g_AppParams["library"].as<std::vector<std::string> >()) {
(void)Utility::LoadExtensionLibrary(libraryName);
}
}
ConfigCompiler::AddIncludeSearchDir(Application::GetIncludeConfDir());
if (g_AppParams.count("include")) {
BOOST_FOREACH(const String& includePath, g_AppParams["include"].as<std::vector<std::string> >()) {
ConfigCompiler::AddIncludeSearchDir(includePath);
}
}
if (g_AppParams.count("no-config") == 0 && g_AppParams.count("config") == 0) {
Log(LogCritical, "icinga-app", "You need to specify at least one config file (using the --config option).");
return EXIT_FAILURE;
}
if (!g_AppParams.count("validate") && !g_AppParams.count("reload-internal")) {
pid_t runningpid = Application::ReadPidFile(Application::GetPidPath());
if (runningpid > 0) {
Log(LogCritical, "icinga-app", "Another instance of Icinga already running with PID " + Convert::ToString(runningpid));
return EXIT_FAILURE;
}
}
if (!LoadConfigFiles(appType))
return EXIT_FAILURE;
if (g_AppParams.count("validate")) {
Log(LogInformation, "icinga-app", "Finished validating the configuration file(s).");
return EXIT_SUCCESS;
}
if(g_AppParams.count("reload-internal")) {
int parentpid = g_AppParams["reload-internal"].as<int>();
Log(LogInformation, "icinga-app", "Terminating previous instance of Icinga (PID " + Convert::ToString(parentpid) + ")");
TerminateAndWaitForEnd(parentpid);
Log(LogInformation, "icinga-app", "Previous instance has ended, taking over now.");
}
if (g_AppParams.count("daemonize")) {
if (!g_AppParams.count("reload-internal")) {
// no additional fork neccessary on reload
Daemonize();
}
String errorLog;
if (g_AppParams.count("errorlog"))
errorLog = g_AppParams["errorlog"].as<std::string>();
SetDaemonIO(errorLog);
Logger::DisableConsoleLog();
}
// activate config only after daemonization: it starts threads and that is not compatible with fork()
if (!ConfigItem::ActivateItems()) {
Log(LogCritical, "icinga-app", "Error activating configuration.");
return EXIT_FAILURE;
}
#ifndef _WIN32
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = &SigHupHandler;
sigaction(SIGHUP, &sa, NULL);
#endif /* _WIN32 */
int rc = Application::GetInstance()->Run();
#ifndef _DEBUG
_exit(rc); // Yay, our static destructors are pretty much beyond repair at this point.
#endif /* _DEBUG */
return rc;
}
#ifdef _WIN32
static int SetupService(bool install, int argc, char **argv)
{
SC_HANDLE schSCManager = OpenSCManager(
NULL,
NULL,
SC_MANAGER_ALL_ACCESS);
if (NULL == schSCManager) {
printf("OpenSCManager failed (%d)\n", GetLastError());
return 1;
}
TCHAR szPath[MAX_PATH];
if (!GetModuleFileName(NULL, szPath, MAX_PATH)) {
printf("Cannot install service (%d)\n", GetLastError());
return 1;
}
String szArgs;
szArgs = Utility::EscapeShellArg(szPath) + " --scm";
for (int i = 0; i < argc; i++)
szArgs += " " + Utility::EscapeShellArg(argv[i]);
SC_HANDLE schService = OpenService(schSCManager, "icinga2", DELETE | SERVICE_STOP | SERVICE_QUERY_STATUS);
if (schService != NULL) {
SERVICE_STATUS status;
ControlService(schService, SERVICE_CONTROL_STOP, &status);
double start = Utility::GetTime();
while (status.dwCurrentState != SERVICE_STOPPED) {
double end = Utility::GetTime();
if (end - start > 30) {
printf("Could not stop the service.\n");
break;
}
Utility::Sleep(5);
if (!QueryServiceStatus(schService, &status)) {
printf("QueryServiceStatus failed (%d)\n", GetLastError());
return 1;
}
}
if (!DeleteService(schService)) {
printf("DeleteService failed (%d)\n", GetLastError());
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
return 1;
}
if (!install)
printf("Service uninstalled successfully\n");
CloseServiceHandle(schService);
}
if (install) {
schService = CreateService(
schSCManager,
"icinga2",
"Icinga 2",
SERVICE_ALL_ACCESS,
SERVICE_WIN32_OWN_PROCESS,
SERVICE_DEMAND_START,
SERVICE_ERROR_NORMAL,
szArgs.CStr(),
NULL,
NULL,
NULL,
"NT AUTHORITY\\NetworkService",
NULL);
if (schService == NULL) {
printf("CreateService failed (%d)\n", GetLastError());
CloseServiceHandle(schSCManager);
return 1;
} else
printf("Service installed successfully\n");
ChangeServiceConfig(schService, SERVICE_NO_CHANGE, SERVICE_AUTO_START,
SERVICE_ERROR_NORMAL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
SERVICE_DESCRIPTION sdDescription = { "The Icinga 2 monitoring application" };
ChangeServiceConfig2(schService, SERVICE_CONFIG_DESCRIPTION, &sdDescription);
if (!StartService(schService, 0, NULL)) {
printf("StartService failed (%d)\n", GetLastError());
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
return 1;
}
CloseServiceHandle(schService);
}
CloseServiceHandle(schSCManager);
return 0;
}
VOID ReportSvcStatus(DWORD dwCurrentState,
DWORD dwWin32ExitCode,
DWORD dwWaitHint)
{
static DWORD dwCheckPoint = 1;
l_SvcStatus.dwCurrentState = dwCurrentState;
l_SvcStatus.dwWin32ExitCode = dwWin32ExitCode;
l_SvcStatus.dwWaitHint = dwWaitHint;
if (dwCurrentState == SERVICE_START_PENDING)
l_SvcStatus.dwControlsAccepted = 0;
else
l_SvcStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP;
if ((dwCurrentState == SERVICE_RUNNING) ||
(dwCurrentState == SERVICE_STOPPED))
l_SvcStatus.dwCheckPoint = 0;
else
l_SvcStatus.dwCheckPoint = dwCheckPoint++;
SetServiceStatus(l_SvcStatusHandle, &l_SvcStatus);
}
VOID WINAPI ServiceControlHandler(DWORD dwCtrl)
{
if (dwCtrl == SERVICE_CONTROL_STOP) {
ReportSvcStatus(SERVICE_STOP_PENDING, NO_ERROR, 0);
Application::RequestShutdown();
}
}
VOID WINAPI ServiceMain(DWORD argc, LPSTR *argv)
{
l_SvcStatusHandle = RegisterServiceCtrlHandler(
"icinga2",
ServiceControlHandler);
l_SvcStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
l_SvcStatus.dwServiceSpecificExitCode = 0;
ReportSvcStatus(SERVICE_RUNNING, NO_ERROR, 0);
int rc = Main();
ReportSvcStatus(SERVICE_STOPPED, NO_ERROR, rc);
}
#endif /* _WIN32 */
/**
* Entry point for the Icinga application.
*
* @params argc Number of command line arguments.
* @params argv Command line arguments.
* @returns The application's exit status.
*/
int main(int argc, char **argv)
{
/* must be called before using any other libbase functions */
Application::InitializeBase();
/* Set command-line arguments. */
Application::SetArgC(argc);
Application::SetArgV(argv);
#ifdef _WIN32
if (argc > 1 && strcmp(argv[1], "--scm-install") == 0) {
return SetupService(true, argc - 2, &argv[2]);
}
if (argc > 1 && strcmp(argv[1], "--scm-uninstall") == 0) {
return SetupService(false, argc - 2, &argv[2]);
}
if (argc > 1 && strcmp(argv[1], "--scm") == 0) {
SERVICE_TABLE_ENTRY dispatchTable[] = {
{ "icinga2", ServiceMain },
{ NULL, NULL }
};
StartServiceCtrlDispatcher(dispatchTable);
_exit(1);
}
#endif /* _WIN32 */
int rc = Main();
exit(rc);
}