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arangodb/arangod/Agency/AgentConfiguration.cpp

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////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2014-2018 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Kaveh Vahedipour
////////////////////////////////////////////////////////////////////////////////
#include "AgentConfiguration.h"
#include "Basics/ReadLocker.h"
#include "Basics/WriteLocker.h"
using namespace arangodb::consensus;
config_t::config_t()
: _agencySize(0),
_poolSize(0),
_minPing(0.0),
_maxPing(0.0),
_timeoutMult(1),
_endpoint(defaultEndpointStr),
_supervision(false),
_supervisionTouched(false),
_waitForSync(true),
_supervisionFrequency(5.0),
_compactionStepSize(2000),
_compactionKeepSize(500),
_supervisionGracePeriod(15.0),
_cmdLineTimings(false),
_version(0),
_startup("origin"),
_maxAppendSize(250),
_lock() {}
config_t::config_t(
std::string const& rid, size_t as, size_t ps, double minp, double maxp,
std::string const& e, std::vector<std::string> const& g, bool s, bool st,
bool w, double f, uint64_t c, uint64_t k, double p, bool t, size_t a)
: _recoveryId(rid),
_agencySize(as),
_poolSize(ps),
_minPing(minp),
_maxPing(maxp),
_timeoutMult(1),
_endpoint(e),
_gossipPeers(g),
_supervision(s),
_supervisionTouched(st),
_waitForSync(w),
_supervisionFrequency(f),
_compactionStepSize(c),
_compactionKeepSize(k),
_supervisionGracePeriod(p),
_cmdLineTimings(t),
_version(0),
_startup("origin"),
_maxAppendSize(a),
_lock() {}
config_t::config_t(config_t const& other) {
// will call operator=, which will ensure proper locking
*this = other;
}
config_t& config_t::operator=(config_t const& other) {
// must hold the lock of other to copy _pool, _minPing, _maxPing etc.
READ_LOCKER(readLocker, other._lock);
_id = other._id;
_recoveryId = other._recoveryId;
_agencySize = other._agencySize;
_poolSize = other._poolSize;
_minPing = other._minPing;
_maxPing = other._maxPing;
_timeoutMult = other._timeoutMult;
_endpoint = other._endpoint;
_pool = other._pool;
_gossipPeers = other._gossipPeers;
_active = other._active;
_supervision = other._supervision;
_supervisionTouched = other._supervisionTouched;
_waitForSync = other._waitForSync;
_supervisionFrequency = other._supervisionFrequency;
_compactionStepSize = other._compactionStepSize;
_compactionKeepSize = other._compactionKeepSize;
_supervisionGracePeriod = other._supervisionGracePeriod;
_cmdLineTimings = other._cmdLineTimings;
_version = other._version;
_startup = other._startup;
_maxAppendSize = other._maxAppendSize;
return *this;
}
config_t& config_t::operator=(config_t&& other) {
READ_LOCKER(readLocker, other._lock);
_id = std::move(other._id);
_agencySize = std::move(other._agencySize);
_poolSize = std::move(other._poolSize);
_minPing = std::move(other._minPing);
_maxPing = std::move(other._maxPing);
_timeoutMult = std::move(other._timeoutMult);
_endpoint = std::move(other._endpoint);
_pool = std::move(other._pool);
_gossipPeers = std::move(other._gossipPeers);
_active = std::move(other._active);
_supervision = std::move(other._supervision);
_supervisionTouched = std::move(other._supervisionTouched);
_waitForSync = std::move(other._waitForSync);
_supervisionFrequency = std::move(other._supervisionFrequency);
_compactionStepSize = std::move(other._compactionStepSize);
_compactionKeepSize = std::move(other._compactionKeepSize);
_supervisionGracePeriod = std::move(other._supervisionGracePeriod);
_cmdLineTimings = std::move(other._cmdLineTimings);
_version = std::move(other._version);
_startup = std::move(other._startup);
_maxAppendSize = std::move(other._maxAppendSize);
return *this;
}
size_t config_t::version() const {
READ_LOCKER(readLocker, _lock);
return _version;
}
bool config_t::cmdLineTimings() const {
READ_LOCKER(readLocker, _lock);
return _cmdLineTimings;
}
double config_t::supervisionGracePeriod() const {
READ_LOCKER(readLocker, _lock);
return _supervisionGracePeriod;
}
double config_t::minPing() const {
READ_LOCKER(readLocker, _lock);
return _minPing;
}
double config_t::maxPing() const {
READ_LOCKER(readLocker, _lock);
return _maxPing;
}
int64_t config_t::timeoutMult() const {
READ_LOCKER(readLocker, _lock);
return _timeoutMult;
}
void config_t::pingTimes(double minPing, double maxPing) {
WRITE_LOCKER(writeLocker, _lock);
if (_minPing != minPing || _maxPing != maxPing ) {
_minPing = minPing;
_maxPing = maxPing;
++_version;
}
}
void config_t::setTimeoutMult(int64_t m) {
WRITE_LOCKER(writeLocker, _lock);
if (_timeoutMult != m) {
_timeoutMult = m;
// this is called during election, do NOT update ++_version
}
}
std::unordered_map<std::string, std::string> config_t::pool() const {
READ_LOCKER(readLocker, _lock);
return _pool;
}
std::string config_t::id() const {
READ_LOCKER(readLocker, _lock);
return _id;
}
std::string config_t::recoveryId() const {
READ_LOCKER(readLocker, _lock);
return _recoveryId;
}
std::string config_t::poolAt(std::string const& id) const {
READ_LOCKER(readLocker, _lock);
return _pool.at(id);
}
std::string config_t::endpoint() const {
READ_LOCKER(readLocker, _lock);
return _endpoint;
}
std::vector<std::string> config_t::active() const {
READ_LOCKER(readLocker, _lock);
return _active;
}
bool config_t::activeEmpty() const {
READ_LOCKER(readLocker, _lock);
return _active.empty();
}
void config_t::activate() {
WRITE_LOCKER(readLocker, _lock);
_active.clear();
for (auto const& pair : _pool) {
_active.push_back(pair.first);
}
}
bool config_t::waitForSync() const {
READ_LOCKER(readLocker, _lock);
return _waitForSync;
}
bool config_t::supervision() const {
READ_LOCKER(readLocker, _lock);
return _supervision;
}
double config_t::supervisionFrequency() const {
READ_LOCKER(readLocker, _lock);
return _supervisionFrequency;
}
bool config_t::activePushBack(std::string const& id) {
WRITE_LOCKER(writeLocker, _lock);
if (_active.size() < _agencySize &&
std::find(_active.begin(), _active.end(), id) == _active.end()) {
_active.push_back(id);
++_version;
return true;
}
return false;
}
std::vector<std::string> config_t::gossipPeers() const {
READ_LOCKER(readLocker, _lock);
return _gossipPeers;
}
void config_t::eraseFromGossipPeers(std::string const& endpoint) {
WRITE_LOCKER(readLocker, _lock);
if (std::find(_gossipPeers.begin(), _gossipPeers.end(), endpoint) !=
_gossipPeers.end()) {
_gossipPeers.erase(
std::remove(_gossipPeers.begin(), _gossipPeers.end(), endpoint),
_gossipPeers.end());
++_version;
}
}
bool config_t::upsertPool(
VPackSlice const& otherPool, std::string const& otherId) {
WRITE_LOCKER(readLocker, _lock);
for (auto const& entry : VPackObjectIterator(otherPool)) {
auto const id = entry.key.copyString();
auto const endpoint = entry.value.copyString();
if (_pool.find(id) == _pool.end()) {
LOG_TOPIC(INFO, Logger::AGENCY)
<< "Adding " << id << "(" << endpoint << ") to agent pool";
_pool[id] = endpoint;
++_version;
} else {
if (_pool.at(id) != endpoint) {
if (id != otherId) { /// discrepancy!
return false;
} else { /// we trust the other guy on his own endpoint
_pool.at(id) = endpoint;
}
}
}
}
return true;
}
size_t config_t::maxAppendSize() const {
READ_LOCKER(readLocker, _lock);
return _maxAppendSize;
}
size_t config_t::compactionStepSize() const {
READ_LOCKER(readLocker, _lock);
return _compactionStepSize;
}
size_t config_t::compactionKeepSize() const {
READ_LOCKER(readLocker, _lock);
return _compactionKeepSize;
}
size_t config_t::size() const {
READ_LOCKER(readLocker, _lock);
return _agencySize;
}
size_t config_t::poolSize() const {
READ_LOCKER(readLocker, _lock);
return _poolSize;
}
bool config_t::poolComplete() const {
READ_LOCKER(readLocker, _lock);
return _poolSize == _pool.size();
}
query_t config_t::activeToBuilder() const {
query_t ret = std::make_shared<arangodb::velocypack::Builder>();
{
READ_LOCKER(readLocker, _lock);
VPackArrayBuilder r(ret.get());
for (auto const& i : _active) {
ret->add(VPackValue(i));
}
}
return ret;
}
query_t config_t::activeAgentsToBuilder() const {
query_t ret = std::make_shared<arangodb::velocypack::Builder>();
{
READ_LOCKER(readLocker, _lock);
VPackObjectBuilder r(ret.get());
for (auto const& i : _active) {
ret->add(i, VPackValue(_pool.at(i)));
}
}
return ret;
}
query_t config_t::poolToBuilder() const {
query_t ret = std::make_shared<arangodb::velocypack::Builder>();
{
READ_LOCKER(readLocker, _lock);
VPackObjectBuilder r(ret.get());
for (auto const& i : _pool) {
ret->add(i.first, VPackValue(i.second));
}
}
return ret;
}
bool config_t::updateEndpoint(std::string const& id, std::string const& ep) {
WRITE_LOCKER(readLocker, _lock);
if (_pool[id] != ep) {
_pool[id] = ep;
++_version;
return true;
}
return false;
}
void config_t::update(query_t const& message) {
VPackSlice slice = message->slice();
std::unordered_map<std::string, std::string> pool;
bool changed = false;
for (auto const& p : VPackObjectIterator(slice.get(poolStr))) {
auto const& id = p.key.copyString();
if (id != _id) {
pool[id] = p.value.copyString();
} else {
pool[id] = _endpoint;
}
}
std::vector<std::string> active;
for (auto const& a : VPackArrayIterator(slice.get(activeStr))) {
active.push_back(a.copyString());
}
double minPing = slice.get(minPingStr).getNumber<double>();
double maxPing = slice.get(maxPingStr).getNumber<double>();
int64_t timeoutMult = slice.get(timeoutMultStr).getNumber<int64_t>();
WRITE_LOCKER(writeLocker, _lock);
if (pool != _pool) {
_pool = pool;
changed=true;
}
if (active != _active) {
_active = active;
changed=true;
}
if (minPing != _minPing) {
_minPing = minPing;
changed=true;
}
if (maxPing != _maxPing) {
_maxPing = maxPing;
changed=true;
}
if (timeoutMult != _timeoutMult) {
_timeoutMult = timeoutMult;
changed=true;
}
if (changed) {
++_version;
}
}
/// @brief vpack representation
query_t config_t::toBuilder() const {
query_t ret = std::make_shared<arangodb::velocypack::Builder>();
{
VPackObjectBuilder b(ret.get());
READ_LOCKER(readLocker, _lock);
ret->add(VPackValue(poolStr));
{
VPackObjectBuilder bb(ret.get());
for (auto const& i : _pool) {
ret->add(i.first, VPackValue(i.second));
}
}
ret->add(VPackValue(activeStr));
{
VPackArrayBuilder bb(ret.get());
for (auto const& i : _active) {
ret->add(VPackValue(i));
}
}
ret->add(idStr, VPackValue(_id));
ret->add(agencySizeStr, VPackValue(_agencySize));
ret->add(poolSizeStr, VPackValue(_poolSize));
ret->add(endpointStr, VPackValue(_endpoint));
ret->add(minPingStr, VPackValue(_minPing));
ret->add(maxPingStr, VPackValue(_maxPing));
ret->add(timeoutMultStr, VPackValue(_timeoutMult));
ret->add(supervisionStr, VPackValue(_supervision));
ret->add(supervisionFrequencyStr, VPackValue(_supervisionFrequency));
ret->add(compactionStepSizeStr, VPackValue(_compactionStepSize));
ret->add(compactionKeepSizeStr, VPackValue(_compactionKeepSize));
ret->add(supervisionGracePeriodStr, VPackValue(_supervisionGracePeriod));
ret->add(versionStr, VPackValue(_version));
ret->add(startupStr, VPackValue(_startup));
}
return ret;
}
// Set my id
bool config_t::setId(std::string const& i) {
WRITE_LOCKER(writeLocker, _lock);
if (_id.empty()) {
_id = i;
_pool[_id] = _endpoint; // Register my endpoint with it
++_version;
return true;
} else {
return false;
}
}
// Get startup fix
std::string config_t::startup() const {
READ_LOCKER(readLocker, _lock);
return _startup;
}
/// @brief merge from persisted configuration
bool config_t::merge(VPackSlice const& conf) {
WRITE_LOCKER(writeLocker, _lock); // All must happen under the lock or else ...
// FIXME: All these "command line beats persistence" are wrong, since
// the given default values never happen. Only fixed _supervision with
// _supervisionTouched as an emergency measure.
_id = conf.get(idStr).copyString(); // I get my id
_recoveryId.clear();
_startup = "persistence";
std::stringstream ss;
ss << "Agency size: ";
if (conf.hasKey(agencySizeStr)) { // Persistence beats command line
_agencySize = conf.get(agencySizeStr).getUInt();
ss << _agencySize << " (persisted)";
} else {
if (_agencySize == 0) {
_agencySize = 1;
ss << _agencySize << " (default)";
} else {
ss << _agencySize << " (command line)";
}
}
LOG_TOPIC(DEBUG, Logger::AGENCY) << ss.str();
ss.str("");
ss.clear();
ss << "Agency pool size: ";
if (_poolSize == 0) { // Command line beats persistence
if (conf.hasKey(poolSizeStr)) {
_poolSize = conf.get(poolSizeStr).getUInt();
ss << _poolSize << " (persisted)";
} else {
_poolSize = _agencySize;
ss << _poolSize << " (default)";
}
} else {
ss << _poolSize << " (command line)";
}
LOG_TOPIC(DEBUG, Logger::AGENCY) << ss.str();
ss.str("");
ss.clear();
ss << "Agent pool: ";
if (conf.hasKey(poolStr)) { // Persistence only
LOG_TOPIC(DEBUG, Logger::AGENCY) << "Found agent pool in persistence:";
for (auto const& peer : VPackObjectIterator(conf.get(poolStr))) {
auto const& id = peer.key.copyString();
if (id != _id) {
_pool[id] = peer.value.copyString();
} else {
_pool[id] = _endpoint;
}
}
ss << conf.get(poolStr).toJson() << " (persisted)";
} else {
ss << "empty (default)";
}
LOG_TOPIC(DEBUG, Logger::AGENCY) << ss.str();
ss.str("");
ss.clear();
ss << "Active agents: ";
if (conf.hasKey(activeStr)) { // Persistence only?
for (auto const& a : VPackArrayIterator(conf.get(activeStr))) {
_active.push_back(a.copyString());
ss << a.copyString() << " ";
}
ss << conf.get(activeStr).toJson();
} else {
ss << "empty (default)";
}
LOG_TOPIC(DEBUG, Logger::AGENCY) << ss.str();
ss.str("");
ss.clear();
ss << "Min RAFT interval: ";
if (_minPing == 0) { // Command line beats persistence
if (conf.hasKey(minPingStr)) {
_minPing = conf.get(minPingStr).getNumber<double>();
ss << _minPing << " (persisted)";
} else {
_minPing = 1.0;
ss << _minPing << " (default)";
}
} else {
ss << _minPing << " (command line)";
}
LOG_TOPIC(DEBUG, Logger::AGENCY) << ss.str();
ss.str("");
ss.clear();
ss << "Max RAFT interval: ";
if (_maxPing == 0) { // Command line beats persistence
if (conf.hasKey(maxPingStr)) {
_maxPing = conf.get(maxPingStr).getNumber<double>();
ss << _maxPing << " (persisted)";
} else {
_maxPing = 5.0;
ss << _maxPing << " (default)";
}
} else {
ss << _maxPing << " (command line)";
}
LOG_TOPIC(DEBUG, Logger::AGENCY) << ss.str();
ss.str("");
ss.clear();
ss << "Supervision: ";
if (!_supervisionTouched) { // Command line beats persistence
if (conf.hasKey(supervisionStr)) {
_supervision = conf.get(supervisionStr).getBoolean();
ss << _supervision << " (persisted)";
} else {
ss << _supervision << " (default)";
}
} else {
ss << _supervision << " (command line)";
}
LOG_TOPIC(DEBUG, Logger::AGENCY) << ss.str();
ss.str("");
ss.clear();
ss << "Supervision interval [s]: ";
if (_supervisionFrequency == 0) { // Command line beats persistence
if (conf.hasKey(supervisionFrequencyStr)) {
_supervisionFrequency = conf.get(supervisionFrequencyStr).getNumber<double>();
ss << _supervisionFrequency << " (persisted)";
} else {
_supervisionFrequency = 2.5;
ss << _supervisionFrequency << " (default)";
}
} else {
ss << _supervisionFrequency << " (command line)";
}
LOG_TOPIC(DEBUG, Logger::AGENCY) << ss.str();
ss.str("");
ss.clear();
ss << "Compaction step size: ";
if (_compactionStepSize == 0) { // Command line beats persistence
if (conf.hasKey(compactionStepSizeStr)) {
_compactionStepSize = conf.get(compactionStepSizeStr).getUInt();
ss << _compactionStepSize << " (persisted)";
} else {
_compactionStepSize = 2000;
ss << _compactionStepSize << " (default)";
}
} else {
ss << _compactionStepSize << " (command line)";
}
LOG_TOPIC(DEBUG, Logger::AGENCY) << ss.str();
ss.str("");
ss.clear();
ss << "Compaction keep size: ";
if (_compactionKeepSize == 0) { // Command line beats persistence
if (conf.hasKey(compactionKeepSizeStr)) {
_compactionKeepSize = conf.get(compactionKeepSizeStr).getUInt();
ss << _compactionKeepSize << " (persisted)";
} else {
_compactionStepSize = 500;
ss << _compactionKeepSize << " (default)";
}
} else {
ss << _compactionKeepSize << " (command line)";
}
LOG_TOPIC(DEBUG, Logger::AGENCY) << ss.str();
++_version;
return true;
}
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