1. Install Mariadb
- Install command
yum -y install mariadb mariadb-server
- After the installation of MariaDB is complete, first start MariaDB
systemctl start mariadb
- Set boot
systemctl enable mariadb
MariaDB related simple configuration
- This command enters the configuration related interface
mysql_secure_installation
- The first is to set a password, you will be prompted to enter the password first
Enter current password for root (enter for none): <– enter directly for the first run
- set password
Set root password? [Y / n] <– set root user password, enter y and press Enter or directly press
New password: <– set root user password
Re-enter new password: <– enter the one you set again password
- Other configuration
Remove anonymous users? [Y / n] <– whether to delete anonymous users,
press Enter Disallow root login remotely? [Y / n] <– whether to prohibit root remote login, enter,
Remove test database and access to it? [Y / n] <– whether to delete the test database and press
Reload privilege tables now? [Y / n] <– whether to reload the privilege tables and press Enter
mariadb character set configuration (emphasis)
File /etc/my.cnf configuration
- command
vi /etc/my.cnf
The complete file is given directly here, and you can compare the differences under the [mysqld] tab
# Example MariaDB config file for very large systems.
#
# This is for a large system with memory of 1G-2G where the system runs mainly
# MariaDB.
#
# MariaDB programs look for option files in a set of
# locations which depend on the deployment platform.
# You can copy this option file to one of those
# locations. For information about these locations, do:
# 'my_print_defaults --help' and see what is printed under
# Default options are read from the following files in the given order:
# More information at: http://dev.mysql.com/doc/mysql/en/option-files.html
#
# In this file, you can use all long options that a program supports.
# If you want to know which options a program supports, run the program
# with the "--help" option.
# The following options will be passed to all MySQL clients
[client]
#password = your_password
port = 3306
socket = /var/lib/mysql/mysql.sock
# Here follows entries for some specific programs
# The MySQL server
[mysqld]
port = 3306
socket = /var/lib/mysql/mysql.sock
skip-external-locking
key_buffer_size = 384M
max_allowed_packet = 1M
table_open_cache = 512
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size = 32M
lower_case_table_names = 1
sql_mode=
default-storage-engine = innodb
innodb_file_per_table
max_connections = 4096
collation-server = utf8_general_ci
character-set-server = utf8
# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 8
# Point the following paths to a dedicated disk
#tmpdir = /tmp/
# Don't listen on a TCP/IP port at all. This can be a security enhancement,
# if all processes that need to connect to mysqld run on the same host.
# All interaction with mysqld must be made via Unix sockets or named pipes.
# Note that using this option without enabling named pipes on Windows
# (via the "enable-named-pipe" option) will render mysqld useless!
#
#skip-networking
# Replication Master Server (default)
# binary logging is required for replication
log-bin=mysql-bin
# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id = 1
# Replication Slave (comment out master section to use this)
#
# To configure this host as a replication slave, you can choose between
# two methods :
#
# 1) Use the CHANGE MASTER TO command (fully described in our manual) -
# the syntax is:
#
# CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
# MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
#
# where you replace <host>, <user>, <password> by quoted strings and
# <port> by the master's port number (3306 by default).
#
# Example:
#
# CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
# MASTER_USER='joe', MASTER_PASSWORD='secret';
#
# OR
#
# 2) Set the variables below. However, in case you choose this method, then
# start replication for the first time (even unsuccessfully, for example
# if you mistyped the password in master-password and the slave fails to
# connect), the slave will create a master.info file, and any later
# change in this file to the variables' values below will be ignored and
# overridden by the content of the master.info file, unless you shutdown
# the slave server, delete master.info and restart the slaver server.
# For that reason, you may want to leave the lines below untouched
# (commented) and instead use CHANGE MASTER TO (see above)
#
# required unique id between 2 and 2^32 - 1
# (and different from the master)
# defaults to 2 if master-host is set
# but will not function as a slave if omitted
#server-id = 2
#
# The replication master for this slave - required
#master-host = <hostname>
#
# The username the slave will use for authentication when connecting
# to the master - required
#master-user = <username>
#
# The password the slave will authenticate with when connecting to
# the master - required
#master-password = <password>
#
# The port the master is listening on.
# optional - defaults to 3306
#master-port = <port>
#
# binary logging - not required for slaves, but recommended
#log-bin=mysql-bin
#
# binary logging format - mixed recommended
#binlog_format=mixed
# Uncomment the following if you are using InnoDB tables
#innodb_data_home_dir = /var/lib/mysql
#innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend
#innodb_log_group_home_dir = /var/lib/mysql
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
#innodb_buffer_pool_size = 384M
#innodb_additional_mem_pool_size = 20M
# Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 100M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates
[myisamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout
File /etc/my.cnf.d/client.cnf
vi /etc/my.cnf.d/client.cnf
Add in [client]
default-character-set=utf8
File /etc/my.cnf.d/mysql-clients.cnf
vi /etc/my.cnf.d/mysql-clients.cnf
Add in [mysql]
default-character-set=utf8
All configuration is complete, restart mariadb
systemctl restart mariadb
If the restart is not successful, check the error message in the log file
cd var/log/mariadb
There are mariadb log files in this directory, Tencent Cloud and local file names are different, but they are all in this directory, go and see for yourself
MariaDB view character set
show variables like "%character%"
The configured results are as follows
3. Add users and set permissions
Create User Command
mysql>create user username@localhost identified by 'password';
Directly create user and authorize commands
mysql>grant all on . to username@localhost indentified by 'password';
Grant access to the Internet
mysql>grant all privileges on . to username@'%' identified by 'password';
Grant permissions and can authorize
mysql>grant all privileges on . to username@'hostname' identified by 'password' with grant option;
