本文主要給大家介紹openstack是如何修復(fù)MySQL問題，文章內(nèi)容都是筆者用心摘選和編輯的，openstack是如何修復(fù)mysql問題具有一定的針對(duì)性，對(duì)大家的參考意義還是比較大的，下面跟筆者一起了解下主題內(nèi)容吧。
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同事一臺(tái)openstack單節(jié)點(diǎn)云服務(wù)器由于未知原因，無法正常工作。
遠(yuǎn)程引導(dǎo)同事檢查故障。
[root@localhost ~]# nova-manage service list
出現(xiàn)錯(cuò)誤:SQL connection failed 。貌似沒有連接數(shù)據(jù)庫,看來可能是服務(wù)或數(shù)據(jù)庫有問題。
引導(dǎo)同事檢測(cè)openstack服務(wù)及數(shù)據(jù)庫：
[root@sxun init.d]# /etc/init.d/openstack-keystone status keystone (pid 12593) is running... [root@sxun init.d]# /etc/init.d/openstack-nova-api status openstack-nova-api (pid 7446) is running... [root@sxun init.d]# /etc/init.d/openstack-nova-compute status openstack-nova-compute (pid 11728) is running... [root@sxun init.d]# /etc/init.d/openstack-nova-conductor status openstack-nova-conductor (pid 7704) is running... [root@sxun init.d]# /etc/init.d/mysqld status
mysql is stoppd [root@sxun init.d]# /etc/init.d/mysqld start starting mysqld: [FAILED]
restart也是如此，看來是mysqld服務(wù)沒有啟動(dòng)的問題。為什么沒有啟動(dòng)了，找到了mysqld的日志查看：
tail -100 /var/lib/mysql/sxun.err
錯(cuò)誤日志報(bào)大致錯(cuò)誤如下:
170420 15:00:20 InnoDB: Database was not shut down normally! InnoDB: Starting crash recovery.
......
因圖不完整，引用以下網(wǎng)址文本http://blog.chinaunix.net/uid-27038861-id-3667209.html?bsh_bid=310758849 ，也按照其方法處，沒動(dòng)腦地操作了一下試試
##############以下引用#############
130508 16:30:53 mysqld_safe Starting mysqlddaemon with databases from /data/mysql 130508 16:30:54 [Warning] The syntax'--log-slow-queries' is deprecated and will be removed in a future release.Please use '--slow-query-log'/'--slow-query-log-file' instead. 130508 16:30:54 InnoDB: The InnoDB memoryheap is disabled 130508 16:30:54 InnoDB: Mutexes andrw_locks use GCC atomic builtins 130508 16:30:54 InnoDB: Compressed tablesuse zlib 1.2.3 130508 16:30:54 InnoDB: Initializing bufferpool, size = 500.0M 130508 16:30:54 InnoDB: Completedinitialization of buffer pool 130508 16:30:54 InnoDB: highest supportedfile format is Barracuda. InnoDB: Log scan progressed past thecheckpoint lsn 27219795678 130508 16:30:54 InnoDB: Database was not shut down normally! InnoDB: Starting crash recovery. InnoDB: Reading tablespace information fromthe .ibd files... InnoDB: Restoring possible half-writtendata pages from the doublewrite InnoDB: buffer... InnoDB: Doing recovery: scanned up to logsequence number 27219928522
##############引用，中間省略#############
解決辦法：
刪除掉
ibdata* ,
ib_logfile* ,
所有的日志。
重啟后可啟動(dòng)數(shù)據(jù)庫，因數(shù)據(jù)庫是非正常關(guān)閉引起的。所有會(huì)造成數(shù)據(jù)丟失。要做好備份工作
##############以上引用#############
[root@sxun mysql]# ll total 225356 drwx------ 2 mysql mysql 4096 Feb 15 16:06 cinder drwx------ 2 mysql mysql 4096 Oct 1 2016 glance -rw-rw---- 1 mysql mysql 220200960 Apr 20 18:08 ibdata1 -rw-rw---- 1 mysql mysql 5242880 Apr 20 18:08 ib_logfile0 -rw-rw---- 1 mysql mysql 5242880 Apr 20 18:08 ib_logfile1 drwx------ 2 mysql mysql 4096 Oct 1 2016 keystone drwx------ 2 mysql mysql 4096 Oct 1 2016 mysql srwxrwxrwx 1 mysql mysql 0 Feb 16 14:52 mysql.sock drwx------ 2 mysql mysql 4096 Oct 1 2016 nova drwx------ 2 mysql mysql 4096 Oct 1 2016 ovs_neutron -rw-r----- 1 mysql root 38548 Feb 16 14:52 sxun.err drwx------ 2 mysql mysql 4096 Oct 1 2016 test
生產(chǎn)環(huán)境不敢刪除，先移動(dòng)其它地方備份記
[root@sxun init.d]#mv ibdata* /root/ [root@sxun init.d]#mv ib_logfile* /root/ [root@sxun init.d]# /etc/init.d/mysqld start starting mysqld: [OK]
云服務(wù)器的數(shù)據(jù)庫已經(jīng)是啟動(dòng)起來了，也生成了新的ib*文件。測(cè)試一下keystone和nova服務(wù)，但是：
重慶分公司
重慶分公司
[root@sxun instances]# nova-manage service list
CRITICAL nova[req-97fd8f67-8a06-4ab7-b421-01d36bc6ad02 None None] (ProgrammingError) (1146,"Table 'nova.services' doesn't exist") 'SELECT services.created_at ASservices_created_at, services.updated_at AS services_updated_at,services.deleted_at AS services_deleted_at, services.deleted ASservices_deleted, services.id AS services_id, services.host AS services_host,services.`binary` AS services_binary, services.topic AS services_topic,services.report_count AS services_report_count, services.disabled ASservices_disabled, services.disabled_reason AS services_disabled_reason \nFROMservices \nWHERE services.deleted = %s' (0,)
[root@sxun instances]# keystone user-list
Authorization Failed: An unexpected errorprevented the server from fulfilling your request. (ProgrammingError) (1146,"Table 'keystone.domain' doesn't exist") 'SELECT domain.id ASdomain_id, domain.name AS domain_name, domain.enabled AS domain_enabled,domain.extra AS domain_extra \nFROM domain \nWHERE domain.id = %s' ('default',)(HTTP 500)mysqld起來了,但由于ib*文件已經(jīng)更換，數(shù)據(jù)不一樣了。nova等各項(xiàng)服務(wù)已經(jīng)出錯(cuò)了， 嘗試reboot重啟了一下云服務(wù)器，仍然不行，ib*得還原，但還原又啟動(dòng)不了mysqld了。
直接抄襲主義不行，關(guān)鍵還得想辦法：
InnoDB: Database was not shut down normally! InnoDB: Starting crash recovery.
問題在于這個(gè)錯(cuò)誤，數(shù)據(jù)庫非正常關(guān)機(jī)，然后數(shù)據(jù)庫重啟后有一個(gè)恢復(fù)操作，恢復(fù)不了就掛了。
后續(xù)的解決方案：
1、還原ib*文件，
2、在配置文件加入 不強(qiáng)制恢復(fù)數(shù)據(jù)的 關(guān)掉 #innodb_force_recover = 6。
3、啟動(dòng)數(shù)據(jù)庫，mysqldump將數(shù)據(jù)庫導(dǎo)出。
4、刪除數(shù)據(jù)庫文件，mysql啟動(dòng)完成后重新導(dǎo)入mysql數(shù)據(jù)庫
同事操的刀，具體操作如下：
[root@sxun01 mysql(keystone_admin)]#mysqldump -uroot --all-database >> my_mysql.dump -- Warning: Skipping the data of tablemysql.event. Specify the --events option explicitly. [root@sxun01 mysql(keystone_admin)]#/etc/init.d/mysqld stop Stopping mysqld: [ OK ] [root@sxun01 mysql(keystone_admin)]# rm -rfibdata1 ib_logfile0 ib_logfile1 [root@sxun01 mysql(keystone_admin)]# vi/etc/my.cnf [client] port = 3306 socket = /var/lib/mysql/mysql.sock [mysqld_safe] socket = /var/lib/mysql/mysql.sock [client] port = 3306 socket = /var/lib/mysql/mysql.sock [mysqld_safe] socket = /var/lib/mysql/mysql.sock nice = 0 [mysqld] user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/lib/mysql/mysql.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp skip-external-locking #innodb_force_recover = 6 bind-address = 0.0.0.0 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 log_error = /var/log/mysqld.log expire_logs_days = 10 max_binlog_size = 100M default-storage-engine = InnoDB [mysqldump] quick quote-names "/etc/my.cnf" 43L, 811C written [root@sxun01 mysql(keystone_admin)]# mkdirdatabase_bak [root@sxun01 mysql(keystone_admin)]# mvcinder/ glance/ keystone/ nova/ ovs_neutron/ database_bak/ [root@sxun01 mysql(keystone_admin)]# lldatabase_bak/ total 20 drwx------ 2 mysql mysql 4096 Oct 25 15:08cinder drwx------ 2 mysql mysql 4096 Oct 25 15:08glance drwx------ 2 mysql mysql 4096 Oct 25 15:08keystone drwx------ 2 mysql mysql 4096 Oct 25 15:08nova drwx------ 2 mysql mysql 4096 Oct 25 15:08ovs_neutron [root@sxun01 mysql(keystone_admin)]# ll total 29648 drwxr-xr-x 2 root root 4096 Apr 20 15:15 aaa drwxr-xr-x 2 root root 4096 Apr 20 15:33 bbb drwxr-xr-x 7 root root 4096 Apr 20 15:47 database_bak -rw-r--r-- 1 root root 29610746 Apr 20 15:45 my_mysql.dump drwx------ 2 mysql mysql 4096 Oct 25 15:05 mysql -rw-r----- 1 mysql root 82317 Apr 20 15:46 sxun01.err -rw-r----- 1 mysql root 637765 Apr 20 15:35 sxun01.err-- drwx------ 2 mysql mysql 4096 Oct 25 15:05 test [root@sxun01 mysql(keystone_admin)]# [root@sxun01 mysql(keystone_admin)]# [root@sxun01 mysql(keystone_admin)]#/etc/init.d/mysqld restart Stopping mysqld: [ OK ] Starting mysqld: [ OK ] [root@sxun01 mysql(keystone_admin)]# mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 22 Server version: 5.1.73 Source distribution Copyright (c) 2000, 2013, Oracle and/or itsaffiliates. All rights reserved. Oracle is a registered trademark of OracleCorporation and/or its affiliates. Other names may be trademarksof their respective owners. Type 'help;' or '\h' for help. Type '\c' toclear the current input statement. mysql> quit Bye [root@sxun01 mysql(keystone_admin)]# mysql-uroot < my_mysql.dump [root@sxun01 mysql(keystone_admin)]# [root@sxun01 mysql(keystone_admin)]# [root@sxun01 mysql(keystone_admin)]# mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 93 Server version: 5.1.73 Source distribution Copyright (c) 2000, 2013, Oracle and/or itsaffiliates. All rights reserved. Oracle is a registered trademark of OracleCorporation and/or its affiliates. Other names may be trademarksof their respective owners. Type 'help;' or '\h' for help. Type '\c' toclear the current input statement. mysql> use nova ; Reading table information for completion oftable and column names You can turn off this feature to get aquicker startup with -A Database changed mysql> select * from instances; mysql> quit Bye [root@sxun01 mysql(keystone_admin)]#nova-manage service list Binary Host Zone Status State Updated_At nova-consoleauth sxun01 internal enabled XXX 2017-04-20 05:31:48 nova-scheduler sxun01 internal enabled XXX 2017-04-20 05:31:54 nova-conductor sxun01 internal enabled :-) 2017-04-20 07:49:07 nova-cert sxun01 internal enabled XXX 2017-04-20 05:31:55 nova-compute sxun01 nova enabled XXX 2017-04-20 05:31:53 [root@sxun01 mysql(keystone_admin)]# reboot [root@sxun01 mysql(keystone_admin)]# Broadcast message from root@sxun01 (/dev/pts/0) at 15:49 ... The system is going down for reboot NOW! Last login: Thu Apr 20 15:28:26 2017 [root@sxun01 ~]# nova-manage service list Binary Host Zone Status State Updated_At nova-consoleauth sxun01 internal enabled :-) 2017-04-20 07:53:28 nova-scheduler sxun01 internal enabled :-) 2017-04-20 07:53:28 nova-conductor sxun01 internal enabled :-) 2017-04-20 07:53:28 nova-cert sxun01 internal enabled :-) 2017-04-20 07:53:28 nova-compute sxun01 nova enabled :-) 2017-04-20 07:53:24
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