icinga2/lib/remote/apilistener-sync.cpp

253 lines
8.2 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 "remote/apilistener.hpp"
#include "remote/apifunction.hpp"
#include "base/dynamictype.hpp"
#include "base/logger.hpp"
#include "base/convert.hpp"
#include "base/exception.hpp"
#include <boost/foreach.hpp>
#include <fstream>
using namespace icinga;
REGISTER_APIFUNCTION(Update, config, &ApiListener::ConfigUpdateHandler);
bool ApiListener::IsConfigMaster(const Zone::Ptr& zone) const
{
String path = Application::GetZonesDir() + "/" + zone->GetName();
return Utility::PathExists(path);
}
void ApiListener::ConfigGlobHandler(Dictionary::Ptr& config, const String& path, const String& file)
{
CONTEXT("Creating config update for file '" + file + "'");
Log(LogNotice, "ApiListener")
<< "Creating config update for file '" << file << "'";
std::ifstream fp(file.CStr());
if (!fp)
return;
String content((std::istreambuf_iterator<char>(fp)), std::istreambuf_iterator<char>());
config->Set(file.SubStr(path.GetLength()), content);
}
Dictionary::Ptr ApiListener::LoadConfigDir(const String& dir)
{
Dictionary::Ptr config = new Dictionary();
Utility::GlobRecursive(dir, "*.conf", boost::bind(&ApiListener::ConfigGlobHandler, boost::ref(config), dir, _1), GlobFile);
return config;
}
bool ApiListener::UpdateConfigDir(const Dictionary::Ptr& oldConfig, const Dictionary::Ptr& newConfig, const String& configDir)
{
bool configChange = false;
if (oldConfig->Contains(".timestamp") && newConfig->Contains(".timestamp")) {
double oldTS = Convert::ToDouble(oldConfig->Get(".timestamp"));
double newTS = Convert::ToDouble(newConfig->Get(".timestamp"));
/* skip update if our config is newer */
if (oldTS <= newTS)
return false;
}
BOOST_FOREACH(const Dictionary::Pair& kv, newConfig) {
if (oldConfig->Get(kv.first) != kv.second) {
configChange = true;
String path = configDir + "/" + kv.first;
Log(LogInformation, "ApiListener")
<< "Updating configuration file: " << path;
//pass the directory and generate a dir tree, if not existing already
Utility::MkDirP(Utility::DirName(path), 0755);
std::ofstream fp(path.CStr(), std::ofstream::out | std::ostream::trunc);
fp << kv.second;
fp.close();
}
}
BOOST_FOREACH(const Dictionary::Pair& kv, oldConfig) {
if (!newConfig->Contains(kv.first)) {
configChange = true;
String path = configDir + "/" + kv.first;
(void) unlink(path.CStr());
}
}
String tsPath = configDir + "/.timestamp";
if (!Utility::PathExists(tsPath)) {
std::ofstream fp(tsPath.CStr(), std::ofstream::out | std::ostream::trunc);
fp << Utility::GetTime();
fp.close();
}
return configChange;
}
void ApiListener::SyncZoneDir(const Zone::Ptr& zone) const
{
String newDir = Application::GetZonesDir() + "/" + zone->GetName();
String oldDir = Application::GetLocalStateDir() + "/lib/icinga2/api/zones/" + zone->GetName();
Log(LogInformation, "ApiListener")
<< "Copying zone configuration files from '" << newDir << "' to '" << oldDir << "'.";
if (!Utility::MkDir(oldDir, 0700)) {
Log(LogCritical, "ApiListener")
<< "mkdir() for path '" << oldDir << "'failed with error code " << errno << ", \"" << Utility::FormatErrorNumber(errno) << "\"";
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("mkdir")
<< boost::errinfo_errno(errno)
<< boost::errinfo_file_name(oldDir));
}
Dictionary::Ptr newConfig = LoadConfigDir(newDir);
Dictionary::Ptr oldConfig = LoadConfigDir(oldDir);
UpdateConfigDir(oldConfig, newConfig, oldDir);
}
void ApiListener::SyncZoneDirs(void) const
{
BOOST_FOREACH(const Zone::Ptr& zone, DynamicType::GetObjectsByType<Zone>()) {
if (!IsConfigMaster(zone))
continue;
try {
SyncZoneDir(zone);
} catch (const std::exception&) {
continue;
}
}
}
void ApiListener::SendConfigUpdate(const ApiClient::Ptr& aclient)
{
Endpoint::Ptr endpoint = aclient->GetEndpoint();
ASSERT(endpoint);
Zone::Ptr azone = endpoint->GetZone();
Zone::Ptr lzone = Zone::GetLocalZone();
/* don't try to send config updates to our master */
if (!azone->IsChildOf(lzone))
return;
Dictionary::Ptr configUpdate = new Dictionary();
String zonesDir = Application::GetLocalStateDir() + "/lib/icinga2/api/zones";
BOOST_FOREACH(const Zone::Ptr& zone, DynamicType::GetObjectsByType<Zone>()) {
String zoneDir = zonesDir + "/" + zone->GetName();
if (!zone->IsChildOf(azone) && !zone->IsGlobal()) {
Log(LogNotice, "ApiListener")
<< "Skipping sync for '" << zone->GetName() << "'. Not a child of zone '" << azone->GetName() << "'.";
continue;
}
if (!Utility::PathExists(zoneDir)) {
Log(LogNotice, "ApiListener")
<< "Ignoring sync for '" << zone->GetName() << "'. Zone directory '" << zoneDir << "' does not exist.";
continue;
}
if (zone->IsGlobal())
Log(LogInformation, "ApiListener")
<< "Syncing global zone '" << zone->GetName() << "'.";
configUpdate->Set(zone->GetName(), LoadConfigDir(zonesDir + "/" + zone->GetName()));
}
Dictionary::Ptr params = new Dictionary();
params->Set("update", configUpdate);
Dictionary::Ptr message = new Dictionary();
message->Set("jsonrpc", "2.0");
message->Set("method", "config::Update");
message->Set("params", params);
aclient->SendMessage(message);
}
Value ApiListener::ConfigUpdateHandler(const MessageOrigin& origin, const Dictionary::Ptr& params)
{
if (!origin.FromClient->GetEndpoint() || (origin.FromZone && !Zone::GetLocalZone()->IsChildOf(origin.FromZone)))
return Empty;
ApiListener::Ptr listener = ApiListener::GetInstance();
if (!listener) {
Log(LogCritical, "ApiListener", "No instance available.");
return Empty;
}
if (!listener->GetAcceptConfig()) {
Log(LogWarning, "ApiListener")
<< "Ignoring config update. '" << listener->GetName() << "' does not accept config.";
return Empty;
}
Dictionary::Ptr update = params->Get("update");
bool configChange = false;
ObjectLock olock(update);
BOOST_FOREACH(const Dictionary::Pair& kv, update) {
Zone::Ptr zone = Zone::GetByName(kv.first);
if (!zone) {
Log(LogWarning, "ApiListener")
<< "Ignoring config update for unknown zone: " << kv.first;
continue;
}
String oldDir = Application::GetLocalStateDir() + "/lib/icinga2/api/zones/" + zone->GetName();
if (!Utility::MkDir(oldDir, 0700)) {
Log(LogCritical, "ApiListener")
<< "mkdir() for path '" << oldDir << "'failed with error code " << errno << ", \"" << Utility::FormatErrorNumber(errno) << "\"";
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("mkdir")
<< boost::errinfo_errno(errno)
<< boost::errinfo_file_name(oldDir));
}
Dictionary::Ptr newConfig = kv.second;
Dictionary::Ptr oldConfig = LoadConfigDir(oldDir);
if (UpdateConfigDir(oldConfig, newConfig, oldDir))
configChange = true;
}
if (configChange) {
Log(LogInformation, "ApiListener", "Restarting after configuration change.");
Application::RequestRestart();
}
return Empty;
}