共計 9943 個字符，預計需要花費 25 分鐘才能閱讀完成。
這篇文章主要介紹“CentOS7 安裝 MySQL5.6 遇到的問題怎么解決”，在日常操作中，相信很多人在 CentOS7 安裝 MySQL5.6 遇到的問題怎么解決問題上存在疑惑，丸趣 TV 小編查閱了各式資料，整理出簡單好用的操作方法，希望對大家解答”CentOS7 安裝 MySQL5.6 遇到的問題怎么解決”的疑惑有所幫助！接下來，請跟著丸趣 TV 小編一起來學習吧！
在一測試服務器（centos linux release 7.2.1511）上安裝 mysql 5.6（5.6.19 mysql community server）時遇到下面錯誤，這個是因為 centos 7 的默認數據庫已經不再是 mysql 了，而是 mariadb. mysql 安裝時的 mysql lib 庫與 mariadb 的庫、包沖突了，如下詳情所示（省略了大量日志）
[root@azrlnx06 tmp]# rpm -ivh mysql-server-advanced-5.6.20-1.rhel5.x86_64.rpm
preparing... ################################# [100%]
file /usr/share/mysql/czech/errmsg.sys from install of mysql-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64
file /usr/share/mysql/danish/errmsg.sys from install of mysql-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64
file /usr/share/mysql/dutch/errmsg.sys from install of mysql-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64
file /usr/share/mysql/english/errmsg.sys from install of mysql-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64
file /usr/share/mysql/estonian/errmsg.sys from install of mysql-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64
file /usr/share/mysql/french/errmsg.sys from install of mysql-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64
file /usr/share/mysql/german/errmsg.sys from install of mysql-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64
file /usr/share/mysql/greek/errmsg.sys from install of mysql-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64
........................................................................................................................................................................
file /usr/share/mysql/charsets/macroman.xml from install of mysql-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64
file /usr/share/mysql/charsets/swe7.xml from install of mysql-server-advanced-5.6.20-1.rhel5.x86_64 conflicts with file from package mariadb-libs-1:5.5.50-1.el7_2.x86_64檢查是否存在 mariadb 的相關組件, 然后刪除 mariadb 相關組件。如下所示：
[root@azrlnx06 mysql]# more /etc/redhat-release
centos linux release 7.2.1511 (core)
[root@azrlnx06 mysql]# rpm -qa |grep mariadb
mariadb-libs-5.5.50-1.el7_2.x86_64
[root@azrlnx06 mysql]# rpm -e mariadb-libs-5.5.50-1.el7_2.x86_64
error: failed dependencies:
libmysqlclient.so.18()(64bit) is needed by (installed) postfix-2:2.10.1-6.el7.x86_64
libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) postfix-2:2.10.1-6.el7.x86_64
[root@azrlnx06 mysql]# rpm -e mariadb-libs-5.5.50-1.el7_2.x86_64 --nodeps當然此處刪除 mariadb-libs-5.5.50-1.el7_2.x86_64 組件時遇到依賴錯誤，遂強制刪除該組件，最好使用 yum 刪除 mariadb 相關組件。然后重新安裝 mysql 時遇到 error: mysql-server-advanced-5.6.20-1.rhel5.x86_64: install failed 錯誤，如下所示：
[root@azrlnx06 mysql]# cd /tmp
[root@azrlnx06 tmp]# ls
hsperfdata_azrlnx06 jirasetup mysql-server-advanced-5.6.20-1.rhel5.x86_64.rpm
[root@azrlnx06 tmp]# rpm -ivh mysql-server-advanced-5.6.20-1.rhel5.x86_64.rpm
preparing... ################################# [100%]
updating / installing...
1:mysql-server-advanced-5.6.20-1.rh################################# [100%]
error: unpacking of archive failed on file /usr/bin/innochecksum;582535c8: cpio: read failed - no such file or directory
error: mysql-server-advanced-5.6.20-1.rhel5.x86_64: install failed
[root@azrlnx06 tmp]#
clip_image001對這個錯誤有點莫名其妙，卸載 mysql 相關組件后，重新安裝 mysql，發現缺少 perl 相關模組。如下所示：
[root@azrlnx06 jirasetup]# rpm -ivh mysql-server-advanced-5.6.20-1.rhel5.x86_64.rpm
preparing... ################################# [100%]
updating / installing...
1:mysql-server-advanced-5.6.20-1.rh################################# [100%]
fatal error: please install the following perl modules before executing /usr/bin/mysql_install_db:
data::dumper
[root@azrlnx06 jirasetup]#使用 yum 安裝了 perl perl-devel 相關包（注意：此處安裝 mysql 時，沒有輸出安裝相關 detail 的信息，是因為 perl 相關模組沒有安裝的緣故，此處還漏掉了安裝 perl-data-dumper）
[root@azrlnx06 jirasetup]# yum install -y perl perl-devel安裝完 perl 相關組件后，重新安裝 mysql，如下所示，安裝成功，但是沒有輸出安裝相關 detail 的信息（因為沒有安裝 perl-data-dumper），啟動 mysql 報錯
root@azrlnx06 jirasetup]# rpm -ivh mysql-server-advanced-5.6.20-1.rhel5.x86_64.rpm
preparing... ################################# [100%]
updating / installing...
1:mysql-server-advanced-5.6.20-1.rh################################# [100%]
[root@azrlnx06 jirasetup]# rpm -ivh mysql-client-advanced-5.6.20-1.rhel5.x86_64.rpm
preparing... ################################# [100%]
updating / installing...
1:mysql-client-advanced-5.6.20-1.rh################################# [100%]
[root@azrlnx06 ~]# service mysql start
starting mysql............. error! the server quit without updating pid file (/var/lib/mysql/azrlnx06.pid).
[root@azrlnx06 ~]#找到 mysql 的錯誤日志，然后檢查 /var/lib/mysql/azrlnx06.err 錯誤日志，發現如下錯誤信息：
[root@azrlnx06 mysql]# find / -name *.err
/var/lib/mysql/azrlnx06.err
/var/log/azure/microsoft.ostcextensions.linuxdiagnostic/2.3.9011/mdsd.err
/var/log/azure/microsoft.ostcextensions.linuxdiagnostic/2.3.9013/mdsd.err
/var/log/mdsd/mdsd.err
[root@azrlnx06 mysql]# more /var/lib/mysql/azrlnx06.err
161111 03:28:25 mysqld_safe starting mysqld daemon with databases from /var/lib/mysql
2016-11-11 03:28:25 0 [warning] timestamp with implicit default value is deprecated. please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2016-11-11 03:28:25 2144 [note] plugin federated is disabled.
/usr/sbin/mysqld: table mysql.plugin doesn t exist
2016-11-11 03:28:25 2144 [error] can t open the mysql.plugin table. please run mysql_upgrade to create it.
2016-11-11 03:28:25 2144 [note] innodb: using atomics to ref count buffer pool pages
2016-11-11 03:28:25 2144 [note] innodb: the innodb memory heap is disabled
2016-11-11 03:28:25 2144 [note] innodb: mutexes and rw_locks use gcc atomic builtins
2016-11-11 03:28:25 2144 [note] innodb: memory barrier is not used
2016-11-11 03:28:25 2144 [note] innodb: compressed tables use zlib 1.2.3
2016-11-11 03:28:25 2144 [note] innodb: using linux native aio
2016-11-11 03:28:25 2144 [note] innodb: using cpu crc32 instructions
2016-11-11 03:28:25 2144 [note] innodb: initializing buffer pool, size = 128.0m
2016-11-11 03:28:25 2144 [note] innodb: completed initialization of buffer pool
2016-11-11 03:28:25 2144 [note] innodb: the first specified data file ./ibdata1 did not exist: a new database to be created!
2016-11-11 03:28:25 2144 [note] innodb: setting file ./ibdata1 size to 12 mb
2016-11-11 03:28:25 2144 [note] innodb: database physically writes the file full: wait...
2016-11-11 03:28:26 2144 [note] innodb: setting log file ./ib_logfile101 size to 48 mb
2016-11-11 03:28:31 2144 [note] innodb: setting log file ./ib_logfile1 size to 48 mb
2016-11-11 03:28:37 2144 [note] innodb: renaming log file ./ib_logfile101 to ./ib_logfile0
2016-11-11 03:28:37 2144 [warning] innodb: new log files created, lsn=45781
2016-11-11 03:28:37 2144 [note] innodb: doublewrite buffer not found: creating new
2016-11-11 03:28:37 2144 [note] innodb: doublewrite buffer created
2016-11-11 03:28:37 2144 [note] innodb: 128 rollback segment(s) are active.
2016-11-11 03:28:37 2144 [warning] innodb: creating foreign key constraint system tables.
2016-11-11 03:28:37 2144 [note] innodb: foreign key constraint system tables created
2016-11-11 03:28:37 2144 [note] innodb: creating tablespace and datafile system tables.
2016-11-11 03:28:38 2144 [note] innodb: tablespace and datafile system tables created.
2016-11-11 03:28:38 2144 [note] innodb: waiting for purge to start
2016-11-11 03:28:38 2144 [note] innodb: 5.6.20 started; log sequence number 0
2016-11-11 03:28:38 2144 [warning] no existing uuid has been found, so we assume that this is the first time that this server has been started. generating a new uuid: ef3b0cd5-a7be-11e6-98b3-000d3a8062fe.
2016-11-11 03:28:38 2144 [note] rsa private key file not found: /var/lib/mysql//private_key.pem. some authentication plugins will not work.
2016-11-11 03:28:38 2144 [note] rsa public key file not found: /var/lib/mysql//public_key.pem. some authentication plugins will not work.
2016-11-11 03:28:38 2144 [note] server hostname (bind-address): * port: 3306
2016-11-11 03:28:38 2144 [note] ipv6 is available.
2016-11-11 03:28:38 2144 [note] - :: resolves to ::
2016-11-11 03:28:38 2144 [note] server socket created on ip: :: .
2016-11-11 03:28:38 2144 [error] fatal error: can t open and lock privilege tables: table mysql.user doesn t exist
161111 03:28:38 mysqld_safe mysqld from pid file /var/lib/mysql/azrlnx06.pid ended
clip_image002搜索了一些相關資料，應該是 perl-data-dumper 模組沒有安裝，導致安裝過程中，初始化數據庫失敗，所以啟動 mysql 服務時，找不到相關系統表。具體參考官方文檔 mysql-server rpm does not install perl-data-dumper as a dependency
description:
mysql-server requires perl-data-dumper to function. however, perl-data-dumper is not listed by the mysql-server rpm as a dependency. so if a linux server does not have perl-data-dumper installed, the install-mysql-db will fail. and because of missing the initial database, the mysql service could not be started.
how to repeat:
on a linux server, make sure there is no perl-data-dumper installed. install mysql-server using yum. there should be error message complaining database could not be created.
suggested fix:
add perl-data-dumper as a dependency of the rpm package
解決方法：
1：安裝 perl-data-dumper 模組。
[root@azrlnx06 mysql]# yum install -y perl-data-dumper2：初始化數據庫
[root@azrlnx06 mysql]# sudo mysql_install_db --user=mysql --basedir=/usr/ --ldata=/var/lib/mysql/
clip_image003[root@azrlnx06 mysql]# service mysql start
starting mysql. success!
[root@azrlnx06 mysql]# /usr//bin/mysqladmin -u root password qwe!23
warning: using a password on the command line interface can be insecure.當然也可以卸載 mysql，然后重新安裝，就能看到安裝過程輸出的 detail 信息輸出了。
到此，關于“CentOS7 安裝 MySQL5.6 遇到的問題怎么解決”的學習就結束了，希望能夠解決大家的疑惑。理論與實踐的搭配能更好的幫助大家學習，快去試試吧！若想繼續學習更多相關知識，請繼續關注丸趣 TV 網站，丸趣 TV 小編會繼續努力為大家帶來更多實用的文章！
向 AI 問一下細節
丸趣 TV 網 – 提供最優質的資源集合！
