1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
<?php
/**
* Reports the hostname of a replica DB server.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Maintenance
*/
require_once __DIR__ . '/Maintenance.php';
/**
* Maintenance script that reports the hostname of a replica DB server.
*
* @ingroup Maintenance
*/
class GetReplicaServer extends Maintenance {
public function __construct() {
parent::__construct();
$this->addOption( "group", "Query group to check specifically" );
$this->addOption( 'cluster', 'Use an external cluster by name', false, true );
$this->addDescription( 'Report the hostname of a replica DB server' );
}
public function execute() {
$lbf = $this->getServiceContainer()->getDBLoadBalancerFactory();
if ( $this->hasOption( 'cluster' ) ) {
try {
$lb = $lbf->getExternalLB( $this->getOption( 'cluster' ) );
} catch ( InvalidArgumentException $e ) {
$this->fatalError( 'Error: ' . $e->getMessage() );
}
} else {
$lb = $lbf->getMainLB();
}
$group = $this->getOption( 'group', false );
$index = $lb->getReaderIndex( $group );
if ( $index === false && $group ) {
// retry without the group; it may not exist
$index = $lb->getReaderIndex( false );
}
if ( $index === false ) {
$this->fatalError( 'Error: unable to get reader index' );
}
$this->output( $lb->getServerName( $index ) . "\n" );
}
}
$maintClass = GetReplicaServer::class;
require_once RUN_MAINTENANCE_IF_MAIN;
|
