Status ReplSetConfig::checkIfWriteConcernCanBeSatisfied(
const WriteConcernOptions& writeConcern) const {
if (!writeConcern.wMode.empty() && writeConcern.wMode != WriteConcernOptions::kMajority &&
writeConcern.wMode != WriteConcernOptions::kInternalMajorityNoSnapshot) {
StatusWith<ReplSetTagPattern> tagPatternStatus = findCustomWriteMode(writeConcern.wMode);
if (!tagPatternStatus.isOK()) {
return tagPatternStatus.getStatus();
}
ReplSetTagMatch matcher(tagPatternStatus.getValue());
for (size_t j = 0; j < _members.size(); ++j) {
const MemberConfig& memberConfig = _members[j];
for (MemberConfig::TagIterator it = memberConfig.tagsBegin();
it != memberConfig.tagsEnd();
++it) {
if (matcher.update(*it)) {
return Status::OK();
}
}
}
// Even if all the nodes in the set had a given write it still would not satisfy this
// write concern mode.
return Status(ErrorCodes::UnsatisfiableWriteConcern,
str::stream() << "Not enough nodes match write concern mode \""
<< writeConcern.wMode
<< "\"");
} else {
int nodesRemaining = writeConcern.wNumNodes;
for (size_t j = 0; j < _members.size(); ++j) {
if (!_members[j].isArbiter()) { // Only count data-bearing nodes
--nodesRemaining;
if (nodesRemaining <= 0) {
return Status::OK();
}
}
}
return Status(ErrorCodes::UnsatisfiableWriteConcern, "Not enough data-bearing nodes");
}
}
Status ReplicaSetConfig::validate() const {
if (_version <= 0 || _version > std::numeric_limits<int>::max()) {
return Status(ErrorCodes::BadValue,
str::stream() << kVersionFieldName << " field value of " << _version
<< " is out of range");
}
if (_replSetName.empty()) {
return Status(ErrorCodes::BadValue,
str::stream() << "Replica set configuration must have non-empty "
<< kIdFieldName << " field");
}
if (_heartbeatInterval < Milliseconds(0)) {
return Status(ErrorCodes::BadValue,
str::stream() << kSettingsFieldName << '.' << kHeartbeatIntervalFieldName
<< " field value must be non-negative, "
"but found "
<< durationCount<Milliseconds>(_heartbeatInterval));
}
if (_heartbeatTimeoutPeriod < Seconds(0)) {
return Status(ErrorCodes::BadValue,
str::stream() << kSettingsFieldName << '.' << kHeartbeatTimeoutFieldName
<< " field value must be non-negative, "
"but found "
<< durationCount<Seconds>(_heartbeatTimeoutPeriod));
}
if (_electionTimeoutPeriod < Milliseconds(0)) {
return Status(ErrorCodes::BadValue,
str::stream() << kSettingsFieldName << '.' << kElectionTimeoutFieldName
<< " field value must be non-negative, "
"but found "
<< durationCount<Milliseconds>(_electionTimeoutPeriod));
}
if (_members.size() > kMaxMembers || _members.empty()) {
return Status(ErrorCodes::BadValue,
str::stream() << "Replica set configuration contains " << _members.size()
<< " members, but must have at least 1 and no more than "
<< kMaxMembers);
}
size_t localhostCount = 0;
size_t voterCount = 0;
size_t arbiterCount = 0;
size_t electableCount = 0;
for (size_t i = 0; i < _members.size(); ++i) {
const MemberConfig& memberI = _members[i];
Status status = memberI.validate();
if (!status.isOK())
return status;
if (memberI.getHostAndPort().isLocalHost()) {
++localhostCount;
}
if (memberI.isVoter()) {
++voterCount;
}
// Nodes may be arbiters or electable, or neither, but never both.
if (memberI.isArbiter()) {
++arbiterCount;
} else if (memberI.getPriority() > 0) {
++electableCount;
}
for (size_t j = 0; j < _members.size(); ++j) {
if (i == j)
continue;
const MemberConfig& memberJ = _members[j];
if (memberI.getId() == memberJ.getId()) {
return Status(ErrorCodes::BadValue,
str::stream()
<< "Found two member configurations with same "
<< MemberConfig::kIdFieldName << " field, " << kMembersFieldName
<< "." << i << "." << MemberConfig::kIdFieldName
<< " == " << kMembersFieldName << "." << j << "."
<< MemberConfig::kIdFieldName << " == " << memberI.getId());
}
if (memberI.getHostAndPort() == memberJ.getHostAndPort()) {
return Status(ErrorCodes::BadValue,
str::stream() << "Found two member configurations with same "
<< MemberConfig::kHostFieldName << " field, "
<< kMembersFieldName << "." << i << "."
<< MemberConfig::kHostFieldName
<< " == " << kMembersFieldName << "." << j << "."
<< MemberConfig::kHostFieldName
<< " == " << memberI.getHostAndPort().toString());
}
}
}
if (localhostCount != 0 && localhostCount != _members.size()) {
return Status(
ErrorCodes::BadValue,
str::stream()
<< "Either all host names in a replica set configuration must be localhost "
"references, or none must be; found " << localhostCount << " out of "
<< _members.size());
}
if (voterCount > kMaxVotingMembers || voterCount == 0) {
return Status(ErrorCodes::BadValue,
str::stream() << "Replica set configuration contains " << voterCount
<< " voting members, but must be at least 1 and no more than "
<< kMaxVotingMembers);
}
if (electableCount == 0) {
return Status(ErrorCodes::BadValue,
"Replica set configuration must contain at least "
"one non-arbiter member with priority > 0");
}
// TODO(schwerin): Validate satisfiability of write modes? Omitting for backwards
// compatibility.
if (_defaultWriteConcern.wMode.empty()) {
if (_defaultWriteConcern.wNumNodes == 0) {
return Status(ErrorCodes::BadValue,
"Default write concern mode must wait for at least 1 member");
}
} else {
if (WriteConcernOptions::kMajority != _defaultWriteConcern.wMode &&
!findCustomWriteMode(_defaultWriteConcern.wMode).isOK()) {
return Status(ErrorCodes::BadValue,
str::stream() << "Default write concern requires undefined write mode "
<< _defaultWriteConcern.wMode);
}
}
if (_protocolVersion < 0 || _protocolVersion > std::numeric_limits<int>::max()) {
return Status(ErrorCodes::BadValue,
str::stream() << kProtocolVersionFieldName << " field value of "
<< _protocolVersion << " is out of range");
}
if (_configServer) {
if (arbiterCount > 0) {
return Status(ErrorCodes::BadValue,
"Arbiters are not allowed in replica set configurations being used for "
"config servers");
}
if (!serverGlobalParams.configsvr) {
return Status(ErrorCodes::BadValue,
"Nodes being used for config servers must be started with the "
"--configsvr flag");
}
} else if (serverGlobalParams.configsvr) {
return Status(ErrorCodes::BadValue,
"Nodes started with the --configsvr flag must have configsvr:true in "
"their config");
}
return Status::OK();
}
Status ReplSetConfig::validate() const {
if (_version <= 0 || _version > std::numeric_limits<int>::max()) {
return Status(ErrorCodes::BadValue,
str::stream() << kVersionFieldName << " field value of " << _version
<< " is out of range");
}
if (_replSetName.empty()) {
return Status(ErrorCodes::BadValue,
str::stream() << "Replica set configuration must have non-empty "
<< kIdFieldName
<< " field");
}
if (_heartbeatInterval < Milliseconds(0)) {
return Status(ErrorCodes::BadValue,
str::stream() << kSettingsFieldName << '.' << kHeartbeatIntervalFieldName
<< " field value must be non-negative, "
"but found "
<< durationCount<Milliseconds>(_heartbeatInterval));
}
if (_members.size() > kMaxMembers || _members.empty()) {
return Status(ErrorCodes::BadValue,
str::stream() << "Replica set configuration contains " << _members.size()
<< " members, but must have at least 1 and no more than "
<< kMaxMembers);
}
size_t localhostCount = 0;
size_t voterCount = 0;
size_t arbiterCount = 0;
size_t electableCount = 0;
for (size_t i = 0; i < _members.size(); ++i) {
const MemberConfig& memberI = _members[i];
Status status = memberI.validate();
if (!status.isOK())
return status;
if (memberI.getHostAndPort().isLocalHost()) {
++localhostCount;
}
if (memberI.isVoter()) {
++voterCount;
}
// Nodes may be arbiters or electable, or neither, but never both.
if (memberI.isArbiter()) {
++arbiterCount;
} else if (memberI.getPriority() > 0) {
++electableCount;
}
for (size_t j = 0; j < _members.size(); ++j) {
if (i == j)
continue;
const MemberConfig& memberJ = _members[j];
if (memberI.getId() == memberJ.getId()) {
return Status(ErrorCodes::BadValue,
str::stream() << "Found two member configurations with same "
<< MemberConfig::kIdFieldName
<< " field, "
<< kMembersFieldName
<< "."
<< i
<< "."
<< MemberConfig::kIdFieldName
<< " == "
<< kMembersFieldName
<< "."
<< j
<< "."
<< MemberConfig::kIdFieldName
<< " == "
<< memberI.getId());
}
if (memberI.getHostAndPort() == memberJ.getHostAndPort()) {
return Status(ErrorCodes::BadValue,
str::stream() << "Found two member configurations with same "
<< MemberConfig::kHostFieldName
<< " field, "
<< kMembersFieldName
<< "."
<< i
<< "."
<< MemberConfig::kHostFieldName
<< " == "
<< kMembersFieldName
<< "."
<< j
<< "."
<< MemberConfig::kHostFieldName
<< " == "
<< memberI.getHostAndPort().toString());
}
}
}
if (localhostCount != 0 && localhostCount != _members.size()) {
return Status(
ErrorCodes::BadValue,
str::stream()
<< "Either all host names in a replica set configuration must be localhost "
"references, or none must be; found "
<< localhostCount
<< " out of "
<< _members.size());
}
if (voterCount > kMaxVotingMembers || voterCount == 0) {
return Status(ErrorCodes::BadValue,
str::stream() << "Replica set configuration contains " << voterCount
<< " voting members, but must be at least 1 and no more than "
<< kMaxVotingMembers);
}
if (electableCount == 0) {
return Status(ErrorCodes::BadValue,
"Replica set configuration must contain at least "
"one non-arbiter member with priority > 0");
}
if (_defaultWriteConcern.wMode.empty()) {
if (_defaultWriteConcern.wNumNodes == 0) {
return Status(ErrorCodes::BadValue,
"Default write concern mode must wait for at least 1 member");
}
} else {
if (WriteConcernOptions::kMajority != _defaultWriteConcern.wMode &&
!findCustomWriteMode(_defaultWriteConcern.wMode).isOK()) {
return Status(ErrorCodes::BadValue,
str::stream() << "Default write concern requires undefined write mode "
<< _defaultWriteConcern.wMode);
}
}
if (_protocolVersion != 0 && _protocolVersion != 1) {
return Status(ErrorCodes::BadValue,
str::stream() << kProtocolVersionFieldName << " field value of "
<< _protocolVersion
<< " is not 1 or 0");
}
if (_configServer) {
if (_protocolVersion == 0) {
return Status(ErrorCodes::BadValue, "Config servers cannot run in protocolVersion 0");
}
if (arbiterCount > 0) {
return Status(ErrorCodes::BadValue,
"Arbiters are not allowed in replica set configurations being used for "
"config servers");
}
for (MemberIterator mem = membersBegin(); mem != membersEnd(); mem++) {
if (!mem->shouldBuildIndexes()) {
return Status(ErrorCodes::BadValue,
"Members in replica set configurations being used for config "
"servers must build indexes");
}
if (mem->getSlaveDelay() != Seconds(0)) {
return Status(ErrorCodes::BadValue,
"Members in replica set configurations being used for config "
"servers cannot have a non-zero slaveDelay");
}
}
if (serverGlobalParams.clusterRole != ClusterRole::ConfigServer &&
!skipShardingConfigurationChecks) {
return Status(ErrorCodes::BadValue,
"Nodes being used for config servers must be started with the "
"--configsvr flag");
}
if (!_writeConcernMajorityJournalDefault) {
return Status(ErrorCodes::BadValue,
str::stream() << kWriteConcernMajorityJournalDefaultFieldName
<< " must be true in replica set configurations being "
"used for config servers");
}
} else if (serverGlobalParams.clusterRole == ClusterRole::ConfigServer) {
return Status(ErrorCodes::BadValue,
"Nodes started with the --configsvr flag must have configsvr:true in "
"their config");
}
if (!_connectionString.isValid()) {
return Status(ErrorCodes::BadValue,
"ReplSetConfig represented an invalid replica set ConnectionString");
}
return Status::OK();
}