web-dev-qa-db-fra.com

Dans MySQL, plusieurs instances multiples, l'instance par défaut est en cours d'exécution, la deuxième instance n'est pas

J'ai été configuré pour créer plusieurs instances sur la machine Ubuntu. Lorsque je démarre les instances MySQL MySQLD1 est en cours d'exécution mais mysqld2 ne fonctionne pas.

root@ubuntu:/var/lib# mysqld_multi report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is not running


Below is my my.cnf file :

[client]
port            = 3306
socket          = /var/run/mysqld/mysqld.sock

[mysqld_safe]
socket          = /var/run/mysqld/mysqld.sock
Nice            = 0

[mysqld]
basedir         = /usr
tmpdir          = /tmp
skip-external-locking
bind-address            = 127.0.0.1
key_buffer              = 16M
max_allowed_packet      = 16M
thread_stack            = 192K
thread_cache_size       = 8
myisam-recover         = BACKUP
query_cache_limit       = 1M
query_cache_size        = 16M
expire_logs_days        = 10
max_binlog_size         = 100M

[mysqld_multi]
mysqld     = /usr/bin/mysqld_safe
mysqladmin = /usr/bin/mysqladmin
log        = /var/log/mysqld_multi.log
user       = multi_admin
password   = admin123

[mysqld1]
port       = 3306
datadir    = /var/lib/mysql
pid-file   = /var/lib/mysql/mysqld.pid
socket     = /var/lib/mysql/mysql.sock
user       = mysql
log-error  = /var/log/mysql1.err
[mysqld2]
port       = 3307
datadir    = /var/lib/mysql-databases/mysqld2
pid-file   = /var/lib/mysql-databases/mysqld2/mysql.pid
socket     = /var/lib/mysql-databases/mysqld2/mysql.sock
user       = mysql
log-error  = /var/log/mysql2.err

[mysqldump]
quick
quote-names
max_allowed_packet      = 16M

[mysql]

[isamchk]
key_buffer              = 16M

!includedir /etc/mysql/conf.d/

Lorsque je vérifie mon fichier journal d'erreur mysql2.err, l'erreur était comme,

130120 18:41:59 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql-databases/mysqld2
130120 18:41:59 [Warning] Can't create test file /var/lib/mysql-databases/mysqld2/ubuntu.lower-test
130120 18:41:59 [Warning] Can't create test file /var/lib/mysql-databases/mysqld2/ubuntu.lower-test
130120 18:41:59 [Note] Plugin 'FEDERATED' is disabled.
/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
130120 18:41:59 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
130120 18:41:59  InnoDB: Initializing buffer pool, size = 8.0M
130120 18:41:59  InnoDB: Completed initialization of buffer pool
130120 18:41:59  InnoDB: Operating system error number 13 in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory.
InnoDB: File name ./ibdata1
InnoDB: File operation call: 'create'.
InnoDB: Cannot continue operation.
130120 18:41:59 mysqld_safe mysqld from pid file /var/lib/mysql-databases/mysqld2/mysql.pid ended

Vous trouverez ci-dessous mon fichier APARMOR.

#include <tunables/global>

/usr/sbin/mysqld {
capability dac_override,
capability sys_resource,
capability setgid,
capability setuid,
network tcp,
/etc/hosts.allow r,
/etc/hosts.deny r,
/etc/mysql/*.pem r,
/etc/mysql/conf.d/ r,
/etc/mysql/conf.d/* r,
/etc/mysql/*.cnf r,
/usr/lib/mysql/plugin/ r,
/usr/lib/mysql/plugin/*.so* mr,
/usr/sbin/mysqld mr,
/usr/share/mysql/** r,
/var/log/mysql.log rw,
/var/log/mysql.err rw,
/var/lib/mysql/ r,
/var/lib/mysql/** rwk,
/var/log/mysql/ r,
/var/log/mysql/* rw,
/{,var/}run/mysqld/mysqld.pid w,
/{,var/}run/mysqld/mysqld.sock w,
/sys/devices/system/cpu/ r,
}

My Deuxième instance Le chemin du répertoire des données est:/var/lib/mysql-Bases de données/mysqld2/mysql S'il vous plaît laissez-moi savoir comment résoudre ce problème. Merci d'avance.

mysqlmysqld-multi
1
vellaidurai

J'ai regardé et j'ai vu ça

/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)

C'est un problème d'autorisation de fichier.

S'il vous plaît aller à Linux et courir

cd /var/lib/mysql-databases/
chown -R mysql:mysql mysqld2

Maintenant, vous devriez être capable de redémarrer MySQL pour le port 3307

1
RolandoMySQLDBA

Je pense que vous avez besoin de deux fichiers my.cnf différents - un pour chaque instance MySQL.

Vous aurez besoin de valeurs distinctes dans chaque fichier pour le port, la prise, le datadir de fichiers PID (et d'autres autres que si vous prévoyez d'utiliser la réplication; Server-ID, relais-journal, relais-log-info-file, relais-journal -indice).

Créez les deux fichiers, puis commencez vos instances comme celle-ci;

/ usr/bin/mysqld_safe --default-file =/etc/mysql/my1.cnf

/ usr/bin/mysqld_safe --default-file =/etc/mysql/my2.cnf

0
digitalronin