centos7 mariaDb5.5 升级到最新版本

1.创建/etc/yum.repos.d/MariaDB.repo文件，这里用到了刚刚发布正式版的10.0

[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.0/centos6-amd64/
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1

2.关闭并卸载旧版本的mariadb，安装新版本的mariadb。

systemctl stop mariadb
yum remove mariadb-server mariadb mariadb-libs
yum clean all
yum install MariaDB-server MariaDB-client

3.自定义数据目录和服务端口，移除默认的数据目录，创建新的数据目录。

rm -rf /var/lib/mysql
mkdir /var/data/db/mariadb

4.修改配置文件/etc/my.cnf.d/mysql-clients.cnf，重点是[client]，其他的可以参考

[client]
port        = 3307
socket      = /var/data/db/mariadb/mysql.sock

[mysql]
no-auto-rehash

[mysqldump]
quick
max_allowed_packet = 64M

[myisamchk]
key_buffer_size = 128M
sort_buffer_size = 128M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

5.修改配置文件/etc/my.cnf.d/server.cnf，这里的性能参数来自my-large.ini文件

[mysqld]
port            = 3307
datadir         = /var/data/db/mariadb
socket          = /var/data/db/mariadb/mysql.sock
skip-external-locking
key_buffer_size = 256M
max_allowed_packet = 64M
table_open_cache = 256
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size= 16M
thread_concurrency = 8
log-bin=mysql-bin
binlog_format=mixed
server-id   = 1

6.初始化数据

mysql_install_db --defaults-file=/etc/my.cnf --datadir=/var/data/db/mariadb/ --user=mysql

7.启动服务
systemctl restart mysql

8.设置ROOT密码
mysqladmin -u root password "8888888"

9.登陆mysql
mysql -uroot -p

10.授权root远程登录
root可从任何IP登陆，注意修改密码:'888888'

mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '888888' WITH GRANT OPTION;
mysql>FLUSH RIVILEGES;

root可从指定IP登陆，注意修改密码:'888888'、IP:'192.168.1.188'

mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.1.188' IDENTIFIED BY '888888' WITH GRANT OPTION;
mysql>FLUSH RIVILEGES;