NetWorker : Échec de la sauvegarde MySQL lorsque le fichier « binlog » n’existe pas
Summary: Les premières sauvegardes MySQL à l’aide de NetWorker Module for Databases and Applications (NMDA) ne se terminent jamais lorsque le fichier « binlog » n’existe pas.
Symptoms
La première sauvegarde de MySQL ne se termine jamais lorsque le fichier « binlog » n’existe pas dans la base de données MySQL.
Cause
Étant donné que le fichier « binlog » MySQL n’existe pas, le client NetWorker ne poursuit pas l’activité de sauvegarde.
À partir du client NetWorker, le fichier journal NetWorker (emplacement par défaut : /nsr/logs) signale l’absence de « binlog » dans cette base de données MySQL :
mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000331' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000332' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000333' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000334' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000335' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000336' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000337' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000338' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000339' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000340' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.000341' does not exist. It could have been purged. PITR will not be possible from this backup. ... mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.004583' does not exist. It could have been purged. PITR will not be possible from this backup. mysqlbackup: WARNING: binlog file '/data/mysql/mysql-bin.004584' does not exist. It could have been purged. PITR will not be possible from this backup. 200901 14:37:32 mysqlbackup: INFO: Copying /data/mysql/mysql-bin.004585. <-- Activity log stuck in this step and backup does not send any new data.The backup job must be canceled manually or wait to timeout (in this case it was after 8 hours running). mysqlbackup: Progress in MB: 383400 mysqlbackup: ERROR: Signal 15 received.
Resolution
Pour résoudre ce problème, purgez tous les précédents « binlog » manqués jusqu’au premier « binlog » disponible.
Procédure
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Connectez-vous à votre serveur MySQL en tant qu’utilisateur « root ».
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Connectez-vous à la console de votre base de données MySQL.
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Vérifiez la disponibilité actuelle de « binlog » en exécutant la commande suivante :
mysql> show master logs; <-- Name of the DB that contains the information from the logs missed. | mysql-bin.004580 | 0 | | mysql-bin.004581 | 0 | | mysql-bin.004582 | 0 | | mysql-bin.004583 | 0 | | mysql-bin.004584 | 0 | <-- Last missed log. | mysql-bin.004585 | 1064394753 |
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Purgez tous les « binlog » manqués, avant le premier « binlog » disponible en exécutant la commande suivante :
Remarque : Dans ce cas, « mysql-bin.004585 » est le premier « binlog » disponible.mysql> purge binary logs to 'mysql-bin.004585'; Query OK, 0 rows affected, 4584 warnings (10.12 sec)
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Réexécutez la procédure de sauvegarde pour vérifier qu’elle se termine sans erreur.
- Preuve d’une procédure de sauvegarde réussie (comme indiqué dans les logs NetWorker du côté client) :
200903 09:38:14 mysqlbackup: INFO: Backup image created successfully. mysqlbackup: INFO: Image Path = sbt:MYSQL:/MySQLTest 200903 09:38:14 mysqlbackup: INFO: MySQL binlog position: filename mysql-bin.004957, position 154 ------------------------------------------------------------- Parameters Summary ------------------------------------------------------------- Start LSN : 15597868102656 End LSN : 15597868102712 ------------------------------------------------------------- mysqlbackup completed OK! with 2 warnings.