Reference article:

https://blog.csdn.net/dongdong9223/article/details/86687735

Ready to work

1. Set the firewall port

firewall-cmd --zone=public --add-port=3306/tcp --permanent

Reload:

firewall-cmd --reload

View all open ports:

firewall-cmd --zone=public --list-ports

2. See if CentOS comes with MariaDB

rpm -qa|grep mariadb

mariadb-libs-5.5.56-2.el7.x86_64

3. View the MariaDB installation package configuration file

rpm -qc mariadb-libs-5.5.56-2.el7.x86_64

/etc/my.cnf

/etc/my.cnf.d/mysql-clients.cnf

In addition: you can use rpm -qi to view the installation package information, and use rpm -ql to view the location of all files in the installation package.

4. Uninstall the installed MariaDB

rpm -e --nodeps mariadb-libs-5.5.56-2.el7.x86_64

2. Download MariaDB

Baidu SkyDrive Download

Link: https://pan.baidu.com/s/1I1ONRLOM7mEv5sZw8_4MSQ

Extraction code: hyop

Three, install MariaDB

Go to the cd /home/software/mariadb/ directory

cd /home/software/mariadb/

1. Unzip the tar.gz file

tar -zxvf mariadb-10.2.21-linux-x86_64.tar.gz

mv mariadb-10.2.21-linux-x86_64 /usr/local

2. Move the decompressed folder to the /usr/local folder

cd /usr/local

mv mariadb-10.2.21-linux-x86_64  mysql

3. Create mysql user group and users

groupadd mysql

useradd -g mysql mysql

4. Authorize the mysql folder:

cd /usr/local/

chown -R mysql:mysql /usr/local/mysql

5. Set environment variables

Modify the configuration file:

vi /etc/profile

add content:

# set for mariadb
export MARIADB=/usr/local/mysql
export PATH=$MARIADB/bin:$PATH

#Effective configuration file

source /etc/profile

6. Copy the my.cnf file (optional)

Go to the /usr/local directory

cd /usr/local/mysql/

cp support-files/my-huge.cnf my.cnf

That is, put it in the mysql directory.

In fact, there are several files in the support-files folder:

my-huge.cnf

my-large.cnf

my-medium.cnf

my-small.cnf

These files are for different database sizes, you can check the comments at the beginning of the file content to find out.

7. Copy mysql.server as mysqld

File:

/usr/local/mysql/support-files/mysql.server

Copy as:

/etc/init.d/mysqld

The command is as follows:

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld

8. Initialization

Install libaio

Follow libaio before initialization, the command is as follows:

yum install libaio

Otherwise, an error will be reported:

error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory

7.2 Initialize MariaDB

Use the command:

./scripts/mysql_install_db --user=mysql

or:

./scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --defaults-file=/usr/local/mysql/my.cnf

Pay special attention here! The command is:

./scripts/mysql_install_db --user=mysql

Instead of:

scripts/mysql_install_db --user=mysql

The dot and slash symbol in front of the folder scripts cannot be omitted!

9. Check status

service mysqld status

[root@shizhi001 mysql]#

MariaDB running (818) [ OK ]

10. Start MariaDB

service mysqld start

Starting MariaDB.190129 15:05:00 mysqld_safe Logging to '/usr/local/mysql/data/shizhi001.err'.

190129 15:05:00 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data [OK]

11. Set the database root user password

Go to the /usr/local/mysql directory

cd /usr/local/mysql

Set root user password

./bin/mysqladmin -u root password '123456'

View hostname

hostname

mariadb

Set the root user password to connect to this host

./bin/mysqladmin -u root -h  mariadb  password '123456'

5. Close the database

./bin/mysqladmin -uroot -p shutdown

Enter password:
[1]+  Done                    ./bin/mysqld_safe --user=mysql

Set up remote access

Four, database connection, query

1. Connect and log in

./bin/mysql -uroot -p

Enter password:

#Enter password 123456

MariaDB [(none)]> show databases;

MariaDB [(none)]> use mysql;

MariaDB [mysql]> desc user;

MariaDB [mysql]> select host,user,password from user;

#Note: root is the user who logs in to the database, 123456 is the password to log in to the database, * means any host from any source

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;

#Refresh to take effect

mysql> FLUSH PRIVILEGES;

MariaDB adds a boot-up service:

chkconfig --add mysqld

View the boot-up service:

chkconfig --list

Restart the server and verify whether the configuration is successful at startup

Install-MariaDB on CentOS 7.5