* - Binlog-based usage assumes single-source replication and non-hierarchical replication.
* - GTID-based usage allows getting/syncing with multi-source replication. It is assumed
* that GTID sets are complete (e.g. include all domains on the server).
+ *
+ * @see https://mariadb.com/kb/en/library/gtid/
+ * @see https://dev.mysql.com/doc/refman/5.6/en/replication-gtids-concepts.html
*/
class MySQLMasterPos implements DBMasterPos {
- /** @var string|null Binlog file base name */
- public $binlog;
- /** @var int[]|null Binglog file position tuple */
- public $pos;
- /** @var string[] GTID list */
- public $gtids = [];
+ /** @var int One of (BINARY_LOG, GTID_MYSQL, GTID_MARIA) */
+ private $style;
+ /** @var string|null Base name of all Binary Log files */
+ private $binLog;
+ /** @var int[]|null Binary Log position tuple (index number, event number) */
+ private $logPos;
+ /** @var string[] Map of (server_uuid/gtid_domain_id => GTID) */
+ private $gtids = [];
+ /** @var int|null Active GTID domain ID */
+ private $activeDomain;
+ /** @var int|null ID of the server were DB writes originate */
+ private $activeServerId;
+ /** @var string|null UUID of the server were DB writes originate */
+ private $activeServerUUID;
/** @var float UNIX timestamp */
- public $asOfTime = 0.0;
+ private $asOfTime = 0.0;
+
+ const BINARY_LOG = 'binary-log';
+ const GTID_MARIA = 'gtid-maria';
+ const GTID_MYSQL = 'gtid-mysql';
+
+ /** @var int Key name of the binary log index number of a position tuple */
+ const CORD_INDEX = 0;
+ /** @var int Key name of the binary log event number of a position tuple */
+ const CORD_EVENT = 1;
/**
* @param string $position One of (comma separated GTID list, <binlog file>/<integer>)
protected function init( $position, $asOfTime ) {
$m = [];
if ( preg_match( '!^(.+)\.(\d+)/(\d+)$!', $position, $m ) ) {
- $this->binlog = $m[1]; // ideally something like host name
- $this->pos = [ (int)$m[2], (int)$m[3] ];
+ $this->binLog = $m[1]; // ideally something like host name
+ $this->logPos = [ self::CORD_INDEX => (int)$m[2], self::CORD_EVENT => (int)$m[3] ];
+ $this->style = self::BINARY_LOG;
} else {
$gtids = array_filter( array_map( 'trim', explode( ',', $position ) ) );
foreach ( $gtids as $gtid ) {
- if ( !self::parseGTID( $gtid ) ) {
+ $components = self::parseGTID( $gtid );
+ if ( !$components ) {
throw new InvalidArgumentException( "Invalid GTID '$gtid'." );
}
- $this->gtids[] = $gtid;
+
+ list( $domain, $pos ) = $components;
+ if ( isset( $this->gtids[$domain] ) ) {
+ // For MySQL, handle the case where some past issue caused a gap in the
+ // executed GTID set, e.g. [last_purged+1,N-1] and [N+1,N+2+K]. Ignore the
+ // gap by using the GTID with the highest ending sequence number.
+ list( , $otherPos ) = self::parseGTID( $this->gtids[$domain] );
+ if ( $pos > $otherPos ) {
+ $this->gtids[$domain] = $gtid;
+ }
+ } else {
+ $this->gtids[$domain] = $gtid;
+ }
+
+ if ( is_int( $domain ) ) {
+ $this->style = self::GTID_MARIA; // gtid_domain_id
+ } else {
+ $this->style = self::GTID_MYSQL; // server_uuid
+ }
}
if ( !$this->gtids ) {
- throw new InvalidArgumentException( "Got empty GTID set." );
+ throw new InvalidArgumentException( "GTID set cannot be empty." );
}
}
}
// Prefer GTID comparisons, which work with multi-tier replication
- $thisPosByDomain = $this->getGtidCoordinates();
- $thatPosByDomain = $pos->getGtidCoordinates();
+ $thisPosByDomain = $this->getActiveGtidCoordinates();
+ $thatPosByDomain = $pos->getActiveGtidCoordinates();
if ( $thisPosByDomain && $thatPosByDomain ) {
$comparisons = [];
// Check that this has positions reaching those in $pos for all domains in common
}
// Prefer GTID comparisons, which work with multi-tier replication
- $thisPosDomains = array_keys( $this->getGtidCoordinates() );
- $thatPosDomains = array_keys( $pos->getGtidCoordinates() );
+ $thisPosDomains = array_keys( $this->getActiveGtidCoordinates() );
+ $thatPosDomains = array_keys( $pos->getActiveGtidCoordinates() );
if ( $thisPosDomains && $thatPosDomains ) {
// Check that $this has a GTID for at least one domain also in $pos; due to MariaDB
// quirks, prior master switch-overs may result in inactive garbage GTIDs that cannot
}
/**
- * @return string|null
+ * @return string|null Base name of binary log files
+ * @since 1.31
+ */
+ public function getLogName() {
+ return $this->gtids ? null : $this->binLog;
+ }
+
+ /**
+ * @return int[]|null Tuple of (binary log file number, event number)
+ * @since 1.31
+ */
+ public function getLogPosition() {
+ return $this->gtids ? null : $this->logPos;
+ }
+
+ /**
+ * @return string|null Name of the binary log file for this position
+ * @since 1.31
*/
public function getLogFile() {
- return $this->gtids ? null : "{$this->binlog}.{$this->pos[0]}";
+ return $this->gtids ? null : "{$this->binLog}.{$this->logPos[self::CORD_INDEX]}";
}
/**
- * @return string[]
+ * @return string[] Map of (server_uuid/gtid_domain_id => GTID)
+ * @since 1.31
*/
public function getGTIDs() {
return $this->gtids;
}
/**
- * @return string GTID set or <binlog file>/<position> (e.g db1034-bin.000976/843431247)
+ * @param int|null $id @@gtid_domain_id of the active replication stream
+ * @since 1.31
*/
- public function __toString() {
- return $this->gtids
- ? implode( ',', $this->gtids )
- : $this->getLogFile() . "/{$this->pos[1]}";
+ public function setActiveDomain( $id ) {
+ $this->activeDomain = (int)$id;
+ }
+
+ /**
+ * @param int|null $id @@server_id of the server were writes originate
+ * @since 1.31
+ */
+ public function setActiveOriginServerId( $id ) {
+ $this->activeServerId = (int)$id;
+ }
+
+ /**
+ * @param string|null $id @@server_uuid of the server were writes originate
+ * @since 1.31
+ */
+ public function setActiveOriginServerUUID( $id ) {
+ $this->activeServerUUID = $id;
}
/**
* @param MySQLMasterPos $pos
* @param MySQLMasterPos $refPos
* @return string[] List of GTIDs from $pos that have domains in $refPos
+ * @since 1.31
*/
public static function getCommonDomainGTIDs( MySQLMasterPos $pos, MySQLMasterPos $refPos ) {
- $gtidsCommon = [];
-
- $relevantDomains = $refPos->getGtidCoordinates(); // (domain => unused)
- foreach ( $pos->gtids as $gtid ) {
- list( $domain ) = self::parseGTID( $gtid );
- if ( isset( $relevantDomains[$domain] ) ) {
- $gtidsCommon[] = $gtid;
- }
- }
-
- return $gtidsCommon;
+ return array_values(
+ array_intersect_key( $pos->gtids, $refPos->getActiveGtidCoordinates() )
+ );
}
/**
* @see https://mariadb.com/kb/en/mariadb/gtid
* @see https://dev.mysql.com/doc/refman/5.6/en/replication-gtids-concepts.html
- * @return array Map of (domain => integer position); possibly empty
+ * @return array Map of (server_uuid/gtid_domain_id => integer position); possibly empty
*/
- protected function getGtidCoordinates() {
+ protected function getActiveGtidCoordinates() {
$gtidInfos = [];
- foreach ( $this->gtids as $gtid ) {
- list( $domain, $pos ) = self::parseGTID( $gtid );
- $gtidInfos[$domain] = $pos;
+
+ foreach ( $this->gtids as $domain => $gtid ) {
+ list( $domain, $pos, $server ) = self::parseGTID( $gtid );
+
+ $ignore = false;
+ // Filter out GTIDs from non-active replication domains
+ if ( $this->style === self::GTID_MARIA && $this->activeDomain !== null ) {
+ $ignore |= ( $domain !== $this->activeDomain );
+ }
+ // Likewise for GTIDs from non-active replication origin servers
+ if ( $this->style === self::GTID_MARIA && $this->activeServerId !== null ) {
+ $ignore |= ( $server !== $this->activeServerId );
+ } elseif ( $this->style === self::GTID_MYSQL && $this->activeServerUUID !== null ) {
+ $ignore |= ( $server !== $this->activeServerUUID );
+ }
+
+ if ( !$ignore ) {
+ $gtidInfos[$domain] = $pos;
+ }
}
return $gtidInfos;
}
/**
- * @param string $gtid
- * @return array|null [domain, integer position] or null
+ * @param string $id GTID
+ * @return array|null [domain ID or server UUID, sequence number, server ID/UUID] or null
*/
- protected static function parseGTID( $gtid ) {
+ protected static function parseGTID( $id ) {
$m = [];
- if ( preg_match( '!^(\d+)-\d+-(\d+)$!', $gtid, $m ) ) {
+ if ( preg_match( '!^(\d+)-(\d+)-(\d+)$!', $id, $m ) ) {
// MariaDB style: <domain>-<server id>-<sequence number>
- return [ (int)$m[1], (int)$m[2] ];
- } elseif ( preg_match( '!^(\w{8}-\w{4}-\w{4}-\w{4}-\w{12}):(\d+)$!', $gtid, $m ) ) {
- // MySQL style: <UUID domain>:<sequence number>
- return [ $m[1], (int)$m[2] ];
+ return [ (int)$m[1], (int)$m[3], (int)$m[2] ];
+ } elseif ( preg_match( '!^(\w{8}-\w{4}-\w{4}-\w{4}-\w{12}):(?:\d+-|)(\d+)$!', $id, $m ) ) {
+ // MySQL style: <server UUID>:<sequence number>-<sequence number>
+ // Normally, the first number should reflect the point (gtid_purged) where older
+ // binary logs where purged to save space. When doing comparisons, it may as well
+ // be 1 in that case. Assume that this is generally the situation.
+ return [ $m[1], (int)$m[2], $m[1] ];
}
return null;
/**
* @see https://dev.mysql.com/doc/refman/5.7/en/show-master-status.html
* @see https://dev.mysql.com/doc/refman/5.7/en/show-slave-status.html
- * @return array|bool (binlog, (integer file number, integer position)) or false
+ * @return array|bool Map of (binlog:<string>, pos:(<integer>, <integer>)) or false
*/
protected function getBinlogCoordinates() {
- return ( $this->binlog !== null && $this->pos !== null )
- ? [ 'binlog' => $this->binlog, 'pos' => $this->pos ]
+ return ( $this->binLog !== null && $this->logPos !== null )
+ ? [ 'binlog' => $this->binLog, 'pos' => $this->logPos ]
: false;
}
public function serialize() {
- return serialize( [ 'position' => $this->__toString(), 'asOfTime' => $this->asOfTime ] );
+ return serialize( [
+ 'position' => $this->__toString(),
+ 'activeDomain' => $this->activeDomain,
+ 'activeServerId' => $this->activeServerId,
+ 'activeServerUUID' => $this->activeServerUUID,
+ 'asOfTime' => $this->asOfTime
+ ] );
}
public function unserialize( $serialized ) {
}
$this->init( $data['position'], $data['asOfTime'] );
+ if ( isset( $data['activeDomain'] ) ) {
+ $this->setActiveDomain( $data['activeDomain'] );
+ }
+ if ( isset( $data['activeServerId'] ) ) {
+ $this->setActiveOriginServerId( $data['activeServerId'] );
+ }
+ if ( isset( $data['activeServerUUID'] ) ) {
+ $this->setActiveOriginServerUUID( $data['activeServerUUID'] );
+ }
+ }
+
+ /**
+ * @return string GTID set or <binary log file>/<position> (e.g db1034-bin.000976/843431247)
+ */
+ public function __toString() {
+ return $this->gtids
+ ? implode( ',', $this->gtids )
+ : $this->getLogFile() . "/{$this->logPos[self::CORD_EVENT]}";
}
}
dépôts / lhc / web / wiklou.git / blobdiff