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| 1 | <?php |
| 2 | /** |
| 3 | * Reports the hostname of a replica DB server. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | * http://www.gnu.org/copyleft/gpl.html |
| 19 | * |
| 20 | * @file |
| 21 | * @ingroup Maintenance |
| 22 | */ |
| 23 | |
| 24 | require_once __DIR__ . '/Maintenance.php'; |
| 25 | |
| 26 | /** |
| 27 | * Maintenance script that reports the hostname of a replica DB server. |
| 28 | * |
| 29 | * @ingroup Maintenance |
| 30 | */ |
| 31 | class GetReplicaServer extends Maintenance { |
| 32 | public function __construct() { |
| 33 | parent::__construct(); |
| 34 | $this->addOption( "group", "Query group to check specifically" ); |
| 35 | $this->addOption( 'cluster', 'Use an external cluster by name', false, true ); |
| 36 | $this->addDescription( 'Report the hostname of a replica DB server' ); |
| 37 | } |
| 38 | |
| 39 | public function execute() { |
| 40 | $lbf = $this->getServiceContainer()->getDBLoadBalancerFactory(); |
| 41 | if ( $this->hasOption( 'cluster' ) ) { |
| 42 | try { |
| 43 | $lb = $lbf->getExternalLB( $this->getOption( 'cluster' ) ); |
| 44 | } catch ( InvalidArgumentException $e ) { |
| 45 | $this->fatalError( 'Error: ' . $e->getMessage() ); |
| 46 | } |
| 47 | } else { |
| 48 | $lb = $lbf->getMainLB(); |
| 49 | } |
| 50 | |
| 51 | $group = $this->getOption( 'group', false ); |
| 52 | $index = $lb->getReaderIndex( $group ); |
| 53 | if ( $index === false && $group ) { |
| 54 | // retry without the group; it may not exist |
| 55 | $index = $lb->getReaderIndex( false ); |
| 56 | } |
| 57 | if ( $index === false ) { |
| 58 | $this->fatalError( 'Error: unable to get reader index' ); |
| 59 | } |
| 60 | |
| 61 | $this->output( $lb->getServerName( $index ) . "\n" ); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | $maintClass = GetReplicaServer::class; |
| 66 | require_once RUN_MAINTENANCE_IF_MAIN; |