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icinga2/lib/remote/apilistener.cpp

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/******************************************************************************
* 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/apiclient.hpp"
#include "remote/endpoint.hpp"
#include "base/convert.hpp"
#include "base/netstring.hpp"
#include "base/json.hpp"
#include "base/dynamictype.hpp"
#include "base/logger.hpp"
#include "base/objectlock.hpp"
#include "base/stdiostream.hpp"
#include "base/application.hpp"
#include "base/context.hpp"
#include "base/statsfunction.hpp"
#include "base/exception.hpp"
#include <fstream>
using namespace icinga;
REGISTER_TYPE(ApiListener);
boost::signals2::signal<void(bool)> ApiListener::OnMasterChanged;
REGISTER_STATSFUNCTION(ApiListenerStats, &ApiListener::StatsFunc);
void ApiListener::OnConfigLoaded(void)
{
/* set up SSL context */
boost::shared_ptr<X509> cert;
try {
cert = GetX509Certificate(GetCertPath());
} catch (const std::exception&) {
Log(LogCritical, "ApiListener")
<< "Cannot get certificate from cert path: '" << GetCertPath() << "'.";
Application::Exit(EXIT_FAILURE);
}
try {
SetIdentity(GetCertificateCN(cert));
} catch (const std::exception&) {
Log(LogCritical, "ApiListener")
<< "Cannot get certificate common name from cert path: '" << GetCertPath() << "'.";
Application::Exit(EXIT_FAILURE);
}
Log(LogInformation, "ApiListener")
<< "My API identity: " << GetIdentity();
try {
m_SSLContext = MakeSSLContext(GetCertPath(), GetKeyPath(), GetCaPath());
} catch (const std::exception&) {
Log(LogCritical, "ApiListener")
<< "Cannot make SSL context for cert path: '" << GetCertPath() << "' key path: '" << GetKeyPath() << "' ca path: '" << GetCaPath() << "'.";
Application::Exit(EXIT_FAILURE);
}
if (!GetCrlPath().IsEmpty()) {
try {
AddCRLToSSLContext(m_SSLContext, GetCrlPath());
} catch (const std::exception&) {
Log(LogCritical, "ApiListener")
<< "Cannot add certificate revocation list to SSL context for crl path: '" << GetCrlPath() << "'.";
Application::Exit(EXIT_FAILURE);
}
}
}
void ApiListener::OnAllConfigLoaded(void)
{
if (!Endpoint::GetByName(GetIdentity())) {
Log(LogCritical, "ApiListener")
<< "Endpoint object for '" << GetIdentity() << "' is missing.";
Application::Exit(EXIT_FAILURE);
}
}
/**
* Starts the component.
*/
void ApiListener::Start(void)
{
SyncZoneDirs();
if (std::distance(DynamicType::GetObjectsByType<ApiListener>().first, DynamicType::GetObjectsByType<ApiListener>().second) > 1) {
Log(LogCritical, "ApiListener", "Only one ApiListener object is allowed.");
return;
}
DynamicObject::Start();
{
boost::mutex::scoped_lock(m_LogLock);
RotateLogFile();
OpenLogFile();
}
/* create the primary JSON-RPC listener */
if (!AddListener(GetBindHost(), GetBindPort())) {
Log(LogCritical, "ApiListener")
<< "Cannot add listener on host '" << GetBindHost() << "' for port '" << GetBindPort() << "'.";
Application::Exit(EXIT_FAILURE);
}
m_Timer = new Timer();
m_Timer->OnTimerExpired.connect(boost::bind(&ApiListener::ApiTimerHandler, this));
m_Timer->SetInterval(5);
m_Timer->Start();
m_Timer->Reschedule(0);
OnMasterChanged(true);
}
ApiListener::Ptr ApiListener::GetInstance(void)
{
BOOST_FOREACH(const ApiListener::Ptr& listener, DynamicType::GetObjectsByType<ApiListener>())
return listener;
return ApiListener::Ptr();
}
boost::shared_ptr<SSL_CTX> ApiListener::GetSSLContext(void) const
{
return m_SSLContext;
}
Endpoint::Ptr ApiListener::GetMaster(void) const
{
Zone::Ptr zone = Zone::GetLocalZone();
if (!zone)
return Endpoint::Ptr();
std::vector<String> names;
BOOST_FOREACH(const Endpoint::Ptr& endpoint, zone->GetEndpoints())
if (endpoint->IsConnected() || endpoint->GetName() == GetIdentity())
names.push_back(endpoint->GetName());
std::sort(names.begin(), names.end());
return Endpoint::GetByName(*names.begin());
}
bool ApiListener::IsMaster(void) const
{
Endpoint::Ptr master = GetMaster();
if (!master)
return false;
return master->GetName() == GetIdentity();
}
/**
* Creates a new JSON-RPC listener on the specified port.
*
* @param node The host the listener should be bound to.
* @param service The port to listen on.
*/
bool ApiListener::AddListener(const String& node, const String& service)
{
ObjectLock olock(this);
boost::shared_ptr<SSL_CTX> sslContext = m_SSLContext;
if (!sslContext) {
Log(LogCritical, "ApiListener", "SSL context is required for AddListener()");
return false;
}
Log(LogInformation, "ApiListener")
<< "Adding new listener on port '" << service << "'";
TcpSocket::Ptr server = new TcpSocket();
try {
server->Bind(node, service, AF_UNSPEC);
} catch (const std::exception&) {
Log(LogCritical, "ApiListener")
<< "Cannot bind TCP socket for host '" << node << "' on port '" << service << "'.";
return false;
}
boost::thread thread(boost::bind(&ApiListener::ListenerThreadProc, this, server));
thread.detach();
m_Servers.insert(server);
return true;
}
void ApiListener::ListenerThreadProc(const Socket::Ptr& server)
{
Utility::SetThreadName("API Listener");
server->Listen();
for (;;) {
try {
Socket::Ptr client = server->Accept();
Utility::QueueAsyncCallback(boost::bind(&ApiListener::NewClientHandler, this, client, RoleServer), LowLatencyScheduler);
} catch (const std::exception&) {
Log(LogCritical, "ApiListener", "Cannot accept new connection.");
}
}
}
/**
* Creates a new JSON-RPC client and connects to the specified endpoint.
*
* @param endpoint The endpoint.
*/
void ApiListener::AddConnection(const Endpoint::Ptr& endpoint)
{
{
ObjectLock olock(this);
boost::shared_ptr<SSL_CTX> sslContext = m_SSLContext;
if (!sslContext) {
Log(LogCritical, "ApiListener", "SSL context is required for AddConnection()");
return;
}
}
String host = endpoint->GetHost();
String port = endpoint->GetPort();
Log(LogInformation, "ApiClient")
<< "Reconnecting to API endpoint '" << endpoint->GetName() << "' via host '" << host << "' and port '" << port << "'";
TcpSocket::Ptr client = new TcpSocket();
try {
endpoint->SetConnecting(true);
client->Connect(host, port);
NewClientHandler(client, RoleClient);
endpoint->SetConnecting(false);
} catch (const std::exception& ex) {
endpoint->SetConnecting(false);
client->Close();
std::ostringstream info;
info << "Cannot connect to host '" << host << "' on port '" << port << "'";
Log(LogCritical, "ApiListener", info.str());
Log(LogDebug, "ApiListener")
<< info.str() << "\n" << DiagnosticInformation(ex);
}
}
/**
* Processes a new client connection.
*
* @param client The new client.
*/
void ApiListener::NewClientHandler(const Socket::Ptr& client, ConnectionRole role)
{
CONTEXT("Handling new API client connection");
TlsStream::Ptr tlsStream;
{
ObjectLock olock(this);
try {
tlsStream = new TlsStream(client, role, m_SSLContext);
} catch (const std::exception&) {
Log(LogCritical, "ApiListener", "Cannot create TLS stream from client connection.");
return;
}
}
try {
tlsStream->Handshake();
} catch (const std::exception&) {
Log(LogCritical, "ApiListener", "Client TLS handshake failed.");
return;
}
boost::shared_ptr<X509> cert = tlsStream->GetPeerCertificate();
String identity;
try {
identity = GetCertificateCN(cert);
} catch (const std::exception&) {
Log(LogCritical, "ApiListener")
<< "Cannot get certificate common name from cert path: '" << GetCertPath() << "'.";
return;
}
bool verify_ok = tlsStream->IsVerifyOK();
Log(LogInformation, "ApiListener")
<< "New client connection for identity '" << identity << "'" << (verify_ok ? "" : " (unauthenticated)");
Endpoint::Ptr endpoint;
if (verify_ok)
endpoint = Endpoint::GetByName(identity);
bool need_sync = false;
if (endpoint)
need_sync = !endpoint->IsConnected();
ApiClient::Ptr aclient = new ApiClient(identity, verify_ok, tlsStream, role);
aclient->Start();
if (endpoint) {
endpoint->AddClient(aclient);
if (need_sync) {
{
ObjectLock olock(endpoint);
endpoint->SetSyncing(true);
}
ReplayLog(aclient);
}
SendConfigUpdate(aclient);
} else
AddAnonymousClient(aclient);
}
void ApiListener::ApiTimerHandler(void)
{
double now = Utility::GetTime();
std::vector<int> files;
Utility::Glob(GetApiDir() + "log/*", boost::bind(&ApiListener::LogGlobHandler, boost::ref(files), _1), GlobFile);
std::sort(files.begin(), files.end());
BOOST_FOREACH(int ts, files) {
bool need = false;
BOOST_FOREACH(const Endpoint::Ptr& endpoint, DynamicType::GetObjectsByType<Endpoint>()) {
if (endpoint->GetName() == GetIdentity())
continue;
if (endpoint->GetLogDuration() >= 0 && ts < now - endpoint->GetLogDuration())
continue;
if (ts > endpoint->GetLocalLogPosition()) {
need = true;
break;
}
}
if (!need) {
String path = GetApiDir() + "log/" + Convert::ToString(ts);
Log(LogNotice, "ApiListener")
<< "Removing old log file: " << path;
(void)unlink(path.CStr());
}
}
if (IsMaster()) {
Zone::Ptr my_zone = Zone::GetLocalZone();
BOOST_FOREACH(const Zone::Ptr& zone, DynamicType::GetObjectsByType<Zone>()) {
/* only connect to endpoints in a) the same zone b) our parent zone c) immediate child zones */
if (my_zone != zone && my_zone != zone->GetParent() && zone != my_zone->GetParent())
continue;
bool connected = false;
BOOST_FOREACH(const Endpoint::Ptr& endpoint, zone->GetEndpoints()) {
if (endpoint->IsConnected()) {
connected = true;
break;
}
}
/* don't connect to an endpoint if we already have a connection to the zone */
if (connected)
continue;
BOOST_FOREACH(const Endpoint::Ptr& endpoint, zone->GetEndpoints()) {
/* don't connect to ourselves */
if (endpoint->GetName() == GetIdentity())
continue;
/* don't try to connect to endpoints which don't have a host and port */
if (endpoint->GetHost().IsEmpty() || endpoint->GetPort().IsEmpty())
continue;
/* don't try to connect if there's already a connection attempt */
if (endpoint->GetConnecting())
continue;
Utility::QueueAsyncCallback(boost::bind(&ApiListener::AddConnection, this, endpoint));
}
}
}
BOOST_FOREACH(const Endpoint::Ptr& endpoint, DynamicType::GetObjectsByType<Endpoint>()) {
if (!endpoint->IsConnected())
continue;
double ts = endpoint->GetRemoteLogPosition();
if (ts == 0)
continue;
Dictionary::Ptr lparams = new Dictionary();
lparams->Set("log_position", ts);
Dictionary::Ptr lmessage = new Dictionary();
lmessage->Set("jsonrpc", "2.0");
lmessage->Set("method", "log::SetLogPosition");
lmessage->Set("params", lparams);
BOOST_FOREACH(const ApiClient::Ptr& client, endpoint->GetClients())
client->SendMessage(lmessage);
Log(LogNotice, "ApiListener")
<< "Setting log position for identity '" << endpoint->GetName() << "': "
<< Utility::FormatDateTime("%Y/%m/%d %H:%M:%S", ts);
}
Endpoint::Ptr master = GetMaster();
if (master)
Log(LogNotice, "ApiListener")
<< "Current zone master: " << master->GetName();
std::vector<String> names;
BOOST_FOREACH(const Endpoint::Ptr& endpoint, DynamicType::GetObjectsByType<Endpoint>())
if (endpoint->IsConnected())
names.push_back(endpoint->GetName() + " (" + Convert::ToString(endpoint->GetClients().size()) + ")");
Log(LogNotice, "ApiListener")
<< "Connected endpoints: " << Utility::NaturalJoin(names);
}
void ApiListener::RelayMessage(const MessageOrigin& origin, const DynamicObject::Ptr& secobj, const Dictionary::Ptr& message, bool log)
{
m_RelayQueue.Enqueue(boost::bind(&ApiListener::SyncRelayMessage, this, origin, secobj, message, log));
}
void ApiListener::PersistMessage(const Dictionary::Ptr& message, const DynamicObject::Ptr& secobj)
{
double ts = message->Get("ts");
ASSERT(ts != 0);
Dictionary::Ptr pmessage = new Dictionary();
pmessage->Set("timestamp", ts);
pmessage->Set("message", JsonEncode(message));
Dictionary::Ptr secname = new Dictionary();
secname->Set("type", secobj->GetType()->GetName());
secname->Set("name", secobj->GetName());
pmessage->Set("secobj", secname);
boost::mutex::scoped_lock lock(m_LogLock);
if (m_LogFile) {
NetString::WriteStringToStream(m_LogFile, JsonEncode(pmessage));
m_LogMessageCount++;
SetLogMessageTimestamp(ts);
if (m_LogMessageCount > 50000) {
CloseLogFile();
RotateLogFile();
OpenLogFile();
}
}
}
void ApiListener::SyncSendMessage(const Endpoint::Ptr& endpoint, const Dictionary::Ptr& message)
{
ObjectLock olock(endpoint);
if (!endpoint->GetSyncing()) {
Log(LogNotice, "ApiListener")
<< "Sending message to '" << endpoint->GetName() << "'";
BOOST_FOREACH(const ApiClient::Ptr& client, endpoint->GetClients())
client->SendMessage(message);
}
}
void ApiListener::SyncRelayMessage(const MessageOrigin& origin, const DynamicObject::Ptr& secobj, const Dictionary::Ptr& message, bool log)
{
double ts = Utility::GetTime();
message->Set("ts", ts);
Log(LogNotice, "ApiListener")
<< "Relaying '" << message->Get("method") << "' message";
if (log)
PersistMessage(message, secobj);
if (origin.FromZone)
message->Set("originZone", origin.FromZone->GetName());
bool is_master = IsMaster();
Endpoint::Ptr master = GetMaster();
Zone::Ptr my_zone = Zone::GetLocalZone();
std::vector<Endpoint::Ptr> skippedEndpoints;
std::set<Zone::Ptr> finishedZones;
BOOST_FOREACH(const Endpoint::Ptr& endpoint, DynamicType::GetObjectsByType<Endpoint>()) {
/* don't relay messages to ourselves or disconnected endpoints */
if (endpoint->GetName() == GetIdentity() || !endpoint->IsConnected())
continue;
Zone::Ptr target_zone = endpoint->GetZone();
/* don't relay the message to the zone through more than one endpoint */
if (finishedZones.find(target_zone) != finishedZones.end()) {
skippedEndpoints.push_back(endpoint);
continue;
}
/* don't relay messages back to the endpoint which we got the message from */
if (origin.FromClient && endpoint == origin.FromClient->GetEndpoint()) {
skippedEndpoints.push_back(endpoint);
continue;
}
/* don't relay messages back to the zone which we got the message from */
if (origin.FromZone && target_zone == origin.FromZone) {
skippedEndpoints.push_back(endpoint);
continue;
}
/* only relay message to the master if we're not currently the master */
if (!is_master && master != endpoint) {
skippedEndpoints.push_back(endpoint);
continue;
}
/* only relay the message to a) the same zone, b) the parent zone and c) direct child zones */
if (target_zone != my_zone && target_zone != my_zone->GetParent() &&
secobj->GetZone() != target_zone->GetName()) {
skippedEndpoints.push_back(endpoint);
continue;
}
/* only relay messages to zones which have access to the object */
if (!target_zone->CanAccessObject(secobj))
continue;
finishedZones.insert(target_zone);
SyncSendMessage(endpoint, message);
}
BOOST_FOREACH(const Endpoint::Ptr& endpoint, skippedEndpoints)
endpoint->SetLocalLogPosition(ts);
}
String ApiListener::GetApiDir(void)
{
return Application::GetLocalStateDir() + "/lib/icinga2/api/";
}
/* must hold m_LogLock */
void ApiListener::OpenLogFile(void)
{
String path = GetApiDir() + "log/current";
std::fstream *fp = new std::fstream(path.CStr(), std::fstream::out | std::ofstream::app);
if (!fp->good()) {
Log(LogWarning, "ApiListener")
<< "Could not open spool file: " << path;
return;
}
m_LogFile = new StdioStream(fp, true);
m_LogMessageCount = 0;
SetLogMessageTimestamp(Utility::GetTime());
}
/* must hold m_LogLock */
void ApiListener::CloseLogFile(void)
{
if (!m_LogFile)
return;
m_LogFile->Close();
m_LogFile.reset();
}
/* must hold m_LogLock */
void ApiListener::RotateLogFile(void)
{
double ts = GetLogMessageTimestamp();
if (ts == 0)
ts = Utility::GetTime();
String oldpath = GetApiDir() + "log/current";
String newpath = GetApiDir() + "log/" + Convert::ToString(static_cast<int>(ts)+1);
(void) rename(oldpath.CStr(), newpath.CStr());
}
void ApiListener::LogGlobHandler(std::vector<int>& files, const String& file)
{
String name = Utility::BaseName(file);
int ts;
try {
ts = Convert::ToLong(name);
}
catch (const std::exception&) {
return;
}
files.push_back(ts);
}
void ApiListener::ReplayLog(const ApiClient::Ptr& client)
{
Endpoint::Ptr endpoint = client->GetEndpoint();
CONTEXT("Replaying log for Endpoint '" + endpoint->GetName() + "'");
int count = -1;
double peer_ts = endpoint->GetLocalLogPosition();
bool last_sync = false;
Endpoint::Ptr target_endpoint = client->GetEndpoint();
ASSERT(target_endpoint);
Zone::Ptr target_zone = target_endpoint->GetZone();
if (!target_zone)
return;
for (;;) {
boost::mutex::scoped_lock lock(m_LogLock);
CloseLogFile();
RotateLogFile();
if (count == -1 || count > 50000) {
OpenLogFile();
lock.unlock();
} else {
last_sync = true;
}
count = 0;
std::vector<int> files;
Utility::Glob(GetApiDir() + "log/*", boost::bind(&ApiListener::LogGlobHandler, boost::ref(files), _1), GlobFile);
std::sort(files.begin(), files.end());
BOOST_FOREACH(int ts, files) {
String path = GetApiDir() + "log/" + Convert::ToString(ts);
if (ts < peer_ts)
continue;
Log(LogNotice, "ApiListener")
<< "Replaying log: " << path;
std::fstream *fp = new std::fstream(path.CStr(), std::fstream::in);
StdioStream::Ptr logStream = new StdioStream(fp, true);
String message;
while (true) {
Dictionary::Ptr pmessage;
try {
if (!NetString::ReadStringFromStream(logStream, &message))
break;
pmessage = JsonDecode(message);
} catch (const std::exception&) {
Log(LogWarning, "ApiListener")
<< "Unexpected end-of-file for cluster log: " << path;
/* Log files may be incomplete or corrupted. This is perfectly OK. */
break;
}
if (pmessage->Get("timestamp") <= peer_ts)
continue;
Dictionary::Ptr secname = pmessage->Get("secobj");
if (secname) {
DynamicType::Ptr dtype = DynamicType::GetByName(secname->Get("type"));
if (!dtype)
continue;
DynamicObject::Ptr secobj = dtype->GetObject(secname->Get("name"));
if (!secobj)
continue;
if (!target_zone->CanAccessObject(secobj))
continue;
}
NetString::WriteStringToStream(client->GetStream(), pmessage->Get("message"));
count++;
peer_ts = pmessage->Get("timestamp");
}
logStream->Close();
}
Log(LogNotice, "ApiListener")
<< "Replayed " << count << " messages.";
if (last_sync) {
{
ObjectLock olock2(endpoint);
endpoint->SetSyncing(false);
}
OpenLogFile();
break;
}
}
}
Value ApiListener::StatsFunc(Dictionary::Ptr& status, Array::Ptr& perfdata)
{
Dictionary::Ptr nodes = new Dictionary();
std::pair<Dictionary::Ptr, Dictionary::Ptr> stats;
ApiListener::Ptr listener = ApiListener::GetInstance();
if (!listener)
return 0;
stats = listener->GetStatus();
ObjectLock olock(stats.second);
BOOST_FOREACH(const Dictionary::Pair& kv, stats.second)
perfdata->Add("'api_" + kv.first + "'=" + Convert::ToString(kv.second));
status->Set("api", stats.first);
return 0;
}
std::pair<Dictionary::Ptr, Dictionary::Ptr> ApiListener::GetStatus(void)
{
Dictionary::Ptr status = new Dictionary();
Dictionary::Ptr perfdata = new Dictionary();
/* cluster stats */
status->Set("identity", GetIdentity());
double count_endpoints = 0;
Array::Ptr not_connected_endpoints = new Array();
Array::Ptr connected_endpoints = new Array();
BOOST_FOREACH(const Endpoint::Ptr& endpoint, DynamicType::GetObjectsByType<Endpoint>()) {
if (endpoint->GetName() == GetIdentity())
continue;
count_endpoints++;
if (!endpoint->IsConnected())
not_connected_endpoints->Add(endpoint->GetName());
else
connected_endpoints->Add(endpoint->GetName());
}
status->Set("num_endpoints", count_endpoints);
status->Set("num_conn_endpoints", connected_endpoints->GetLength());
status->Set("num_not_conn_endpoints", not_connected_endpoints->GetLength());
status->Set("conn_endpoints", connected_endpoints);
status->Set("not_conn_endpoints", not_connected_endpoints);
perfdata->Set("num_endpoints", count_endpoints);
perfdata->Set("num_conn_endpoints", Convert::ToDouble(connected_endpoints->GetLength()));
perfdata->Set("num_not_conn_endpoints", Convert::ToDouble(not_connected_endpoints->GetLength()));
return std::make_pair(status, perfdata);
}
void ApiListener::AddAnonymousClient(const ApiClient::Ptr& aclient)
{
ObjectLock olock(this);
m_AnonymousClients.insert(aclient);
}
void ApiListener::RemoveAnonymousClient(const ApiClient::Ptr& aclient)
{
ObjectLock olock(this);
m_AnonymousClients.erase(aclient);
}
std::set<ApiClient::Ptr> ApiListener::GetAnonymousClients(void) const
{
ObjectLock olock(this);
return m_AnonymousClients;
}
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