이유를 설명할 수는 없지만 밤중에 Ubuntu 12.04.1 상자에서 실행되는 MySQL 중 하나가 고장났습니다. 서비스가 실행 중이지만 더 이상 SQL에 로그인할 수 없으며 이전 비밀번호가 더 이상 작동하지 않습니다.
서버가 손상된 것 같지 않습니다( 에는 아무것도 없음 /var/auth.log).
일부 자동 보안 업그레이드(서버가 해당 작업을 수행하도록 구성됨)가 발생하여 문제가 발생한 것 같습니다. 오류가 발생하기 시작한 시점에 MySQL 서버가 로그에서 몇 번 다시 시작되었습니다(CRON 작업이 실패하면 이메일을 받습니다).
로그에서는 설정되지 않은 루트 비밀번호에 대해 불평합니다(SQL을 사용하여 하루 종일 크론 작업을 실행하므로 비밀번호가 몇 달 동안 설정되고 작동했습니다). 어쨌든 비밀번호 없이는 로그인할 수 없습니다!
무슨 일이 일어났을지 아시나요? 데이터베이스를 다시 가져오려면 어떻게 해야 하나요?
이 줄은 이상해 보입니다.
Nov 6 06:36:12 ns398758 mysqld_safe[6676]: ERROR: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ALTER TABLE user ADD column Show_view_priv enum('N','Y') CHARACTER SET utf8 NOT ' at line 1
아래는 전체 로그입니다.
Nov 6 06:36:06 ns398758 mysqld_safe[6586]:
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: To do so, start the server, then issue the following commands:
Nov 6 06:36:06 ns398758 mysqld_safe[6586]:
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: /usr/bin/mysqladmin -u root password 'new-password'
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: /usr/bin/mysqladmin -u root -h ns398758.ovh.net password 'new-password'
Nov 6 06:36:06 ns398758 mysqld_safe[6586]:
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: Alternatively you can run:
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: /usr/bin/mysql_secure_installation
Nov 6 06:36:06 ns398758 mysqld_safe[6586]:
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: which will also give you the option of removing the test
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: databases and anonymous user created by default. This is
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: strongly recommended for production servers.
Nov 6 06:36:06 ns398758 mysqld_safe[6586]:
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: See the manual for more instructions.
Nov 6 06:36:06 ns398758 mysqld_safe[6586]:
Nov 6 06:36:06 ns398758 mysqld_safe[6586]: Please report any problems with the /usr/scripts/mysqlbug script!
Nov 6 06:36:06 ns398758 mysqld_safe[6586]:
Nov 6 06:36:06 ns398758 mysqld_safe[6632]: 121106 6:36:06 [Note] Plugin 'FEDERATED' is disabled.
Nov 6 06:36:06 ns398758 mysqld_safe[6632]: 121106 6:36:06 InnoDB: The InnoDB memory heap is disabled
Nov 6 06:36:06 ns398758 mysqld_safe[6632]: 121106 6:36:06 InnoDB: Mutexes and rw_locks use GCC atomic builtins
Nov 6 06:36:06 ns398758 mysqld_safe[6632]: 121106 6:36:06 InnoDB: Compressed tables use zlib 1.2.3.4
Nov 6 06:36:06 ns398758 mysqld_safe[6632]: 121106 6:36:06 InnoDB: Initializing buffer pool, size = 128.0M
Nov 6 06:36:06 ns398758 mysqld_safe[6632]: 121106 6:36:06 InnoDB: Completed initialization of buffer pool
Nov 6 06:36:06 ns398758 mysqld_safe[6632]: 121106 6:36:06 InnoDB: highest supported file format is Barracuda.
Nov 6 06:36:07 ns398758 mysqld_safe[6632]: 121106 6:36:07 InnoDB: Waiting for the background threads to start
Nov 6 06:36:08 ns398758 mysqld_safe[6632]: 121106 6:36:08 InnoDB: 1.1.8 started; log sequence number 29276459701
Nov 6 06:36:08 ns398758 mysqld_safe[6632]: 121106 6:36:08 InnoDB: Starting shutdown...
Nov 6 06:36:09 ns398758 mysqld_safe[6632]: 121106 6:36:09 InnoDB: Shutdown completed; log sequence number 29276459701
Nov 6 06:36:11 ns398758 mysqld_safe[6676]: 121106 6:36:11 [Note] Plugin 'FEDERATED' is disabled.
Nov 6 06:36:11 ns398758 mysqld_safe[6676]: 121106 6:36:11 InnoDB: The InnoDB memory heap is disabled
Nov 6 06:36:11 ns398758 mysqld_safe[6676]: 121106 6:36:11 InnoDB: Mutexes and rw_locks use GCC atomic builtins
Nov 6 06:36:11 ns398758 mysqld_safe[6676]: 121106 6:36:11 InnoDB: Compressed tables use zlib 1.2.3.4
Nov 6 06:36:11 ns398758 mysqld_safe[6676]: 121106 6:36:11 InnoDB: Initializing buffer pool, size = 128.0M
Nov 6 06:36:11 ns398758 mysqld_safe[6676]: 121106 6:36:11 InnoDB: Completed initialization of buffer pool
Nov 6 06:36:11 ns398758 mysqld_safe[6676]: 121106 6:36:11 InnoDB: highest supported file format is Barracuda.
Nov 6 06:36:11 ns398758 mysqld_safe[6676]: 121106 6:36:11 InnoDB: Waiting for the background threads to start
Nov 6 06:36:12 ns398758 mysqld_safe[6676]: 121106 6:36:12 InnoDB: 1.1.8 started; log sequence number 29276459701
Nov 6 06:36:12 ns398758 mysqld_safe[6676]: ERROR: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ALTER TABLE user ADD column Show_view_priv enum('N','Y') CHARACTER SET utf8 NOT ' at line 1
Nov 6 06:36:12 ns398758 mysqld_safe[6676]: 121106 6:36:12 [ERROR] Aborting
Nov 6 06:36:12 ns398758 mysqld_safe[6676]:
Nov 6 06:36:12 ns398758 mysqld_safe[6676]: 121106 6:36:12 InnoDB: Starting shutdown...
Nov 6 06:36:13 ns398758 mysqld_safe[6676]: 121106 6:36:13 InnoDB: Shutdown completed; log sequence number 29276459701
Nov 6 06:36:13 ns398758 mysqld_safe[6676]: 121106 6:36:13 [Note] /usr/sbin/mysqld: Shutdown complete
Nov 6 06:36:13 ns398758 mysqld_safe[6676]:
Nov 6 06:36:13 ns398758 mysqld_safe[6697]: 121106 6:36:13 [Note] Plugin 'FEDERATED' is disabled.
Nov 6 06:36:13 ns398758 mysqld_safe[6697]: 121106 6:36:13 InnoDB: The InnoDB memory heap is disabled
Nov 6 06:36:13 ns398758 mysqld_safe[6697]: 121106 6:36:13 InnoDB: Mutexes and rw_locks use GCC atomic builtins
Nov 6 06:36:13 ns398758 mysqld_safe[6697]: 121106 6:36:13 InnoDB: Compressed tables use zlib 1.2.3.4
Nov 6 06:36:13 ns398758 mysqld_safe[6697]: 121106 6:36:13 InnoDB: Initializing buffer pool, size = 128.0M
Nov 6 06:36:13 ns398758 mysqld_safe[6697]: 121106 6:36:13 InnoDB: Completed initialization of buffer pool
Nov 6 06:36:13 ns398758 mysqld_safe[6697]: 121106 6:36:13 InnoDB: highest supported file format is Barracuda.
Nov 6 06:36:13 ns398758 mysqld_safe[6697]: 121106 6:36:13 InnoDB: Waiting for the background threads to start
Nov 6 06:36:14 ns398758 mysqld_safe[6697]: 121106 6:36:14 InnoDB: 1.1.8 started; log sequence number 29276459701
Nov 6 06:36:14 ns398758 mysqld_safe[6697]: 121106 6:36:14 InnoDB: Starting shutdown...
Nov 6 06:36:15 ns398758 mysqld_safe[6697]: 121106 6:36:15 InnoDB: Shutdown completed; log sequence number 29276459701
Nov 6 06:36:15 ns398758 mysqld_safe[6718]: 121106 6:36:15 [Note] Plugin 'FEDERATED' is disabled.
Nov 6 06:36:15 ns398758 mysqld_safe[6718]: 121106 6:36:15 InnoDB: The InnoDB memory heap is disabled
Nov 6 06:36:15 ns398758 mysqld_safe[6718]: 121106 6:36:15 InnoDB: Mutexes and rw_locks use GCC atomic builtins
Nov 6 06:36:15 ns398758 mysqld_safe[6718]: 121106 6:36:15 InnoDB: Compressed tables use zlib 1.2.3.4
Nov 6 06:36:15 ns398758 mysqld_safe[6718]: 121106 6:36:15 InnoDB: Initializing buffer pool, size = 128.0M
Nov 6 06:36:15 ns398758 mysqld_safe[6718]: 121106 6:36:15 InnoDB: Completed initialization of buffer pool
Nov 6 06:36:15 ns398758 mysqld_safe[6718]: 121106 6:36:15 InnoDB: highest supported file format is Barracuda.
Nov 6 06:36:15 ns398758 mysqld_safe[6718]: 121106 6:36:15 InnoDB: Waiting for the background threads to start
Nov 6 06:36:16 ns398758 mysqld_safe[6718]: 121106 6:36:16 InnoDB: 1.1.8 started; log sequence number 29276459701
Nov 6 06:36:16 ns398758 mysqld_safe[6718]: ERROR: 1050 Table 'plugin' already exists
Nov 6 06:36:16 ns398758 mysqld_safe[6718]: 121106 6:36:16 [ERROR] Aborting
Nov 6 06:36:16 ns398758 mysqld_safe[6718]:
Nov 6 06:36:16 ns398758 mysqld_safe[6718]: 121106 6:36:16 InnoDB: Starting shutdown...
Nov 6 06:36:17 ns398758 mysqld_safe[6718]: 121106 6:36:17 InnoDB: Shutdown completed; log sequence number 29276459701
Nov 6 06:36:17 ns398758 mysqld_safe[6718]: 121106 6:36:17 [Note] /usr/sbin/mysqld: Shutdown complete
Nov 6 06:36:17 ns398758 mysqld_safe[6718]:
Nov 6 06:36:19 ns398758 /etc/mysql/debian-start[6816]: Upgrading MySQL tables if necessary.
Nov 6 06:36:20 ns398758 /etc/mysql/debian-start[6819]: /usr/bin/mysql_upgrade: the '--basedir' option is always ignored
Nov 6 06:36:20 ns398758 /etc/mysql/debian-start[6819]: Looking for 'mysql' as: /usr/bin/mysql
Nov 6 06:36:20 ns398758 /etc/mysql/debian-start[6819]: Looking for 'mysqlcheck' as: /usr/bin/mysqlcheck
Nov 6 06:36:20 ns398758 /etc/mysql/debian-start[6819]: Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/var/run/mysqld/mysqld.sock' '--host=localhost' '--socket=/var/run/mysqld/mysqld.sock' '--host=localhost' '--socket=/var/run/mysqld/mysqld.sock'
Nov 6 06:36:20 ns398758 /etc/mysql/debian-start[6819]: Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/var/run/mysqld/mysqld.sock' '--host=localhost' '--socket=/var/run/mysqld/mysqld.sock' '--host=localhost' '--socket=/var/run/mysqld/mysqld.sock'
Nov 6 06:36:20 ns398758 /etc/mysql/debian-start[6819]: col_digitas.acos OK
Nov 6 06:36:20 ns398758 /etc/mysql/debian-start[6819]: col_digitas.aros OK
...
답변1
다음 단계를 시도해 보세요.http://blog.mclaughlinsoftware.com/2010/10/21/reset-mysql-root-password/
주요 단계는 mysql 구성(적절하게 /etc/mysql/my.cnf)에 다음 줄을 추가하는 것입니다. 이는 기본적으로 mysql 보안 및 네트워크 액세스를 비활성화합니다.
[mysqld]
# These let you safely reset the lost root password.
skip-grant-tables
#enable-named-pipe
#skip-networking
mysql을 다시 시작하면 비밀번호 없이 다음을 수행할 수 있습니다.
mysql -u root
루트 비밀번호를 재설정한 후에는 구성 파일을 다시 변경하는 것을 잊지 마세요.
방법 2
우분투를 사용하고 있으므로 열어주세요./etc/mysql/debian.cnf
다음과 같은 내용이 표시됩니다.
[client]
host = localhost
user = debian-sys-maint
password = xxxxxxxxxx
socket = /var/run/mysqld/mysqld.sock
...
다음을 시도해 보세요
mysql -u debian-sys-maint
해당 파일의 비밀번호로 mysql 프롬프트가 나타나면 my.cnf를 조작하지 않고도 루트 비밀번호를 재설정할 수 있습니다.