MediaWiki REL1_30
getLagTimes.php
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1<?php
24require_once __DIR__ . '/Maintenance.php';
25
27
33class GetLagTimes extends Maintenance {
34 public function __construct() {
35 parent::__construct();
36 $this->addDescription( 'Dump replication lag times' );
37 $this->addOption( 'report', "Report the lag values to StatsD" );
38 }
39
40 public function execute() {
41 $services = MediaWikiServices::getInstance();
42 $lbFactory = $services->getDBLoadBalancerFactory();
43 $stats = $services->getStatsdDataFactory();
44 $lbsByType = [
45 'main' => $lbFactory->getAllMainLBs(),
46 'external' => $lbFactory->getAllExternalLBs()
47 ];
48
49 foreach ( $lbsByType as $type => $lbs ) {
50 foreach ( $lbs as $cluster => $lb ) {
51 if ( $lb->getServerCount() <= 1 ) {
52 continue;
53 }
54 $lags = $lb->getLagTimes();
55 foreach ( $lags as $serverIndex => $lag ) {
56 $host = $lb->getServerName( $serverIndex );
57 if ( IP::isValid( $host ) ) {
58 $ip = $host;
59 $host = gethostbyaddr( $host );
60 } else {
61 $ip = gethostbyname( $host );
62 }
63
64 $starLen = min( intval( $lag ), 40 );
65 $stars = str_repeat( '*', $starLen );
66 $this->output( sprintf( "%10s %20s %3d %s\n", $ip, $host, $lag, $stars ) );
67
68 if ( $this->hasOption( 'report' ) ) {
69 $group = ( $type === 'external' ) ? 'external' : $cluster;
70 $stats->gauge( "loadbalancer.lag.$group.$host", intval( $lag * 1e3 ) );
71 }
72 }
73 }
74 }
75 }
76}
77
78$maintClass = "GetLagTimes";
79require_once RUN_MAINTENANCE_IF_MAIN;
Maintenance script that displays replication lag times.
execute()
Do the actual work.
__construct()
Default constructor.
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
hasOption( $name)
Checks to see if a particular param exists.
addDescription( $text)
Set the description text.
addOption( $name, $description, $required=false, $withArg=false, $shortName=false, $multiOccurrence=false)
Add a parameter to the script.
MediaWikiServices is the service locator for the application scope of MediaWiki.
design txt This is a brief overview of the new design More thorough and up to date information is available on the documentation wiki at etc Handles the details of getting and saving to the user table of the and dealing with sessions and cookies OutputPage Encapsulates the entire HTML page that will be sent in response to any server request It is used by calling its functions to add in any and then calling output() to send it all. It could be easily changed to send incrementally if that becomes useful
static configuration should be added through ResourceLoaderGetConfigVars instead can be used to get the real title after the basic globals have been set but before ordinary actions take place or wrap services the preferred way to define a new service is the $wgServiceWiringFiles array $services
Definition hooks.txt:2243
$maintClass
require_once RUN_MAINTENANCE_IF_MAIN