CentOS7 Deploy MySQL database server

Environmental preparation

• host

Host name	IP Address 1（ Extranet ）	IP Address 2（ Intranet ）	System	other
mysql-server	192.168.72.130	202.207.240.130	CetOS7.5.1804	MEM:2G ;CPU:2P/2C;DISK:15G

• Turn off security components such as firewalls
• To configure CentOS-Base Source
• To configure mysql Install source （yum The installation method requires ）

explain ： In this paper, the experimental method is yum And binary installation MySQL, among MySQL The version is 5.xx

YUM install

• install mysql Source

mkdir -p /server/tools
wget -O /server/tools/mysql-community-release-el7-5.noarch.rpm http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
rpm -ivh /server/tools/mysql-community-release-el7-5.noarch.rpm

• install

1. Uninstall the default mariadb

   rpm -aq mariadb*
   rpm -e --nodeps mariadb-libs
   

2. install mysql

   yum install mysql mysql-server -y
   

3. start-up mysql service

   systemctl start mysqld
   systemctl enable mysqld
   

4. Enter the command mysql verification mysql Is the installation successful

5. Set up mysql Database password

   mysqladmin -uroot password 'xxxxxx'
   

   

Binary installation

• Download binary mysql software package

  Download address ：https://mirrors.aliyun.com/mysql/MySQL-5.7/mysql-5.7.35-linux-glibc2.12-x86_64.tar.gz

  It is recommended to download in advance and upload to the specified directory , The package is relatively large, and the online download is slow

mkdir -p /server/tools
cd /server/tools
wget https://mirrors.aliyun.com/mysql/MySQL-5.7/mysql-5.7.35-linux-glibc2.12-x86_64.tar.gz

• decompression , And move to the specified installation directory

cd /server/tools
tar xzvf mysql-5.7.35-linux-glibc2.12-x86_64.tar.gz
mkdir -p /application
mv mysql-5.7.35-linux-glibc2.12-x86_64 /application/mysql-5.7.35
ln -s /application/mysql-5.7.35 /application/mysql

• Uninstall the default mariadb database , And install mysql Related dependencies

rpm -aq mariadb*
rpm -e --nodeps mariadb-libs

yum install libaio-devel -y

• establish mysql user , Related database directory

useradd mysql -s /sbin/nologin -M

mkdir -p /application/mysql/data
chown -R mysql:mysql /application/mysql

• Modify the configuration file

cat >/etc/my.cnf <<EOF [mysqld] basedir = /application/mysql datadir = /application/mysql/data socket = /tmp/mysql.sock server_id = 1 port = 3306 log_error = /application/mysql/data/error_mysql.err [mysql] socket = /tmp/mysql.sock prompt = wjz [\\d]> EOF

• Initialize database

/application/mysql/bin/mysqld --initialize-insecure --user=mysql \
--basedir=/application/mysql/ --datadir=/application/mysql/data

• To write systemd Service management scripts /usr/lib/systemd/system/mysql.service

cat >/usr/lib/systemd/system/mysql.service <<EOF [Unit] Description=MySQL5.7.35 database server After=syslog.target After=network.target [Service] User=mysql Group=mysql ExecStart=/application/mysql/bin/mysqld --defaults-file=/etc/my.cnf LimitNOFILE = 5000 [Install] WantedBy=multi-user.target EOF

After writing , You can start mysql To test

systemctl start mysql
systemctl enable mysql
systemctl status mysql

• Configure environment variables , test mysql Is the installation successful

echo 'export PATH=/application/mysql/bin:$PATH' >>/etc/profile
source /etc/profile

• Set database password

mysqladmin -uroot password 'xxxxxx'