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File pdns-slavedb.patch of Package powerdns (Revision 98)
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98
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--- modules/gmysqlbackend/gmysqlbackend.cc 2013-01-17 10:16:53.000000000 +0100 +++ modules/gmysqlbackend/gmysqlbackend.cc 2013-05-03 10:51:33.033534080 +0200 @@ -31,6 +31,24 @@ throw AhuException("Unable to launch "+mode+" connection: "+e.txtReason()); } L<<Logger::Info<<mode<<" Connection successful"<<endl; + + if(!getArg("slave-socket").empty() || !getArg("slave-host").empty()) { + try { + setDBReadonly(new SMySQL(getArg("slave-dbname"), + getArg("slave-host"), + getArgAsNum("slave-port"), + getArg("slave-socket"), + getArg("slave-user"), + getArg("slave-password"))); + L<<Logger::Warning<<mode<<" Slave connection successful."<<endl; + } catch(ArgException &e) { + // Ignore exception, slave not + L<<Logger::Warning<<mode<<" Slave configuration."<<endl; + } catch(SSqlException &e) { + // Ignore exception, slave not + L<<Logger::Warning<<mode<<" Unable to connect to slave."<<endl; + } + } } class gMySQLFactory : public BackendFactory @@ -49,6 +67,13 @@ declare(suffix,"group", "Pdns backend MySQL 'group' to connect as", "client"); declare(suffix,"dnssec","Assume DNSSEC Schema is in place","no"); + declare(suffix,"slave-dbname","Pdns backend database name to connect to",""); + declare(suffix,"slave-user","Database backend user to connect as",""); + declare(suffix,"slave-host","Database backend host to connect to",""); + declare(suffix,"slave-port","Database backend port to connect to","0"); + declare(suffix,"slave-socket","Pdns backend socket to connect to",""); + declare(suffix,"slave-password","Pdns backend password to connect with",""); + declare(suffix,"basic-query","Basic query","select content,ttl,prio,type,domain_id,name from records where type='%s' and name='%s'"); declare(suffix,"id-query","Basic with ID query","select content,ttl,prio,type,domain_id,name from records where type='%s' and name='%s' and domain_id=%d"); declare(suffix,"wildcard-query","Wildcard query","select content,ttl,prio,type,domain_id,name from records where type='%s' and name like '%s'"); --- pdns/backends/gsql/gsqlbackend.cc 2013-01-17 10:16:52.000000000 +0100 +++ pdns/backends/gsql/gsqlbackend.cc 2013-05-03 10:46:20.135360708 +0200 @@ -78,7 +78,7 @@ d_MasterOfDomainsZoneQuery.c_str(), sqlEscape(domain).c_str()); try { - d_db->doQuery(output, d_result); + getDBReadonly()->doQuery(output, d_result); } catch (SSqlException &e) { throw AhuException("GSQLBackend unable to retrieve list of master domains: "+e.txtReason()); @@ -111,7 +111,7 @@ snprintf(output,sizeof(output)-1,d_InfoOfDomainsZoneQuery.c_str(), sqlEscape(domain).c_str()); try { - d_db->doQuery(output,d_result); + getDBReadonly()->doQuery(output,d_result); } catch(SSqlException &e) { throw AhuException("GSQLBackend unable to retrieve information about a domain: "+e.txtReason()); @@ -156,7 +156,7 @@ /* list all domains that need refreshing for which we are slave, and insert into SlaveDomain: id,name,master IP,serial */ try { - d_db->doQuery(d_InfoOfAllSlaveDomainsQuery, d_result); + getDBReadonly()->doQuery(d_InfoOfAllSlaveDomainsQuery, d_result); } catch (SSqlException &e) { throw AhuException("GSQLBackend unable to retrieve list of slave domains: "+e.txtReason()); @@ -192,7 +192,7 @@ /* list all domains that need notifications for which we are master, and insert into updatedDomains id,name,master IP,serial */ try { - d_db->doQuery(d_InfoOfAllMasterDomainsQuery,d_result); + getDBReadonly()->doQuery(d_InfoOfAllMasterDomainsQuery,d_result); } catch(SSqlException &e) { throw AhuException("GSQLBackend unable to retrieve list of master domains: "+e.txtReason()); @@ -243,6 +243,7 @@ { setArgPrefix(mode+suffix); d_db=0; + d_db_slave=NULL; d_logprefix="["+mode+"Backend"+suffix+"] "; try @@ -643,7 +644,7 @@ snprintf(output,sizeof(output)-1,d_GetDomainMetadataQuery.c_str(), sqlEscape(name).c_str(), sqlEscape(kind).c_str()); try { - d_db->doQuery(output); + getDBReadonly()->doQuery(output); } catch (SSqlException &e) { throw AhuException("GSQLBackend unable to list metadata: "+e.txtReason()); @@ -732,7 +733,7 @@ } try { - d_db->doQuery(output); + getDBReadonly()->doQuery(output); } catch(SSqlException &e) { throw AhuException(e.txtReason()); @@ -750,7 +751,7 @@ char output[1024]; snprintf(output,sizeof(output)-1,d_listQuery.c_str(),domain_id); try { - d_db->doQuery(output); + getDBReadonly()->doQuery(output); } catch(SSqlException &e) { throw AhuException("GSQLBackend list query: "+e.txtReason()); @@ -770,7 +771,7 @@ for(vector<DNSResourceRecord>::const_iterator i=nsset.begin();i!=nsset.end();++i) { try { snprintf(output,sizeof(output)-1,format.c_str(),sqlEscape(ip).c_str(),sqlEscape(i->content).c_str()); - d_db->doQuery(output, d_result); + getDBReadonly()->doQuery(output, d_result); } catch (SSqlException &e) { throw AhuException("GSQLBackend unable to search for a domain: "+e.txtReason()); @@ -847,7 +848,7 @@ { // L << "GSQLBackend get() was called for "<<qtype.getName() << " record: "; SSql::row_t row; - if(d_db->getRow(row)) { + if(getDBReadonly()->getRow(row)) { r.content=row[0]; if (row[1].empty()) r.ttl = ::arg().asNum( "default-ttl" ); @@ -955,7 +956,7 @@ sd.domain_id); try { - d_db->doQuery(output, d_result); + getDBReadonly()->doQuery(output, d_result); } catch (const SSqlException& e) { //DLOG(L<<"GSQLBackend unable to calculate SOA serial: " << e.txtReason()<<endl); diff -ru pdns-3.2/pdns/backends/gsql/gsqlbackend.hh pdns-3.2.new/pdns/backends/gsql/gsqlbackend.hh --- pdns/backends/gsql/gsqlbackend.hh 2013-01-17 10:16:52.000000000 +0100 +++ pdns/backends/gsql/gsqlbackend.hh 2013-05-03 10:46:20.135360708 +0200 @@ -15,12 +15,24 @@ { if(d_db) delete d_db; + if(d_db_slave) + delete d_db_slave; } void setDB(SSql *db) { d_db=db; } + + void setDBReadonly(SSql *db) + { + d_db_slave=db; + } + + SSql *getDBReadonly() + { + return d_db_slave != NULL ? d_db_slave : d_db; + } virtual string sqlEscape(const string &name); void lookup(const QType &, const string &qdomain, DNSPacket *p=0, int zoneId=-1); @@ -67,6 +79,7 @@ QType d_qtype; int d_count; SSql *d_db; + SSql *d_db_slave; SSql::result_t d_result; string d_wildCardNoIDQuery;
