Mysql8.0主从部署
1、mysql双主规划
初始规划
| 服务器ip | 功能 |
|---|---|
| 10.0.0.1 | 主机点、从节点 |
| 10.0.0.2 | 从节点、主节点 |
2、mysql安装
主节点操作（10.0.0.1）
创建目录
mkdir /data/mysql
mkdir /data/mysql/data
mkdir /data/mysql/log
2、上次rpm包
$ll /data/mysql/
mysql80-community-release-el7-6.noarch.rpm
3、安装mysql
$rpm -ivh /data/mysql/mysql80-community-release-el7-6.noarch.rpm
$rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022
$yum -y install mysql-community-server
4、更改配置文件
$vi /etc/my.cnf
[mysqld]
#数据存储目录
datadir=/data/mysql/data
socket=/var/lib/mysql/mysql.sock
#日志存储目录
log-error=/data/mysql/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
$chown -R mysql:mysql /data/mysql/
5、启动
systemctl start mysqld.service
systemctl enable mysqld.service
systemctl status mysqld.service
6、查看启动
ps -ef|grep mysql
ss -lntup|grep 3306
7、登录修改密码（是否修改密码根据实际要求）
#查看临时密码
$grep 'temporary password' /data/mysql/log/mysqld.log
#登录
mysql -u root -p
#设置密码
mysql> set password="123456";
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements #mysql有密码复杂度要求
mysql> set password="eUok!3qdQ3Dk";
Query OK, 0 rows affected (0.01 sec)
mysql> use mysql;
mysql> select user,host from user;
+------------------+-----------+
| user | host |
+------------------+-----------+
| mysql.infoschema | localhost |
| mysql.session | localhost |
| mysql.sys | localhost |
| root | localhost |
+------------------+-----------+
8、开启主从
修改 master 的配置（ my.cnf）加入下面的内容
$vi /etc/my.cnf
[mysqld]
log-bin=mysql-bin
# id 必须唯一！！！
server-id=1
重启
systemctl restart mysqld.service
创建同步用户
#指定了内网ip段
mysql> CREATE USER 'slave'@'10.0.0.%' IDENTIFIED BY 'gWOp^$8z9L2D';
授权
mysql> GRANT REPLICATION SLAVE ON *.* TO 'slave'@'10.0.0.%';
mysql> flush privileges;
查看状态
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 | 876 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
#记录下 File 和 Position 的值，之后要用到
从节点操作（10.0.0.2）
创建目录
mkdir /data/mysql -p
mkdir /data/mysql/data
mkdir /data/mysql/log
2、上次rpm包
$ll /data/mysql/
mysql80-community-release-el7-6.noarch.rpm
3、安装mysql
$rpm -ivh /data/mysql/mysql80-community-release-el7-6.noarch.rpm
$rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022
$yum -y install mysql-community-server
$chown -R mysql:mysql /data/mysql/
4、更改配置文件
$vi /etc/my.cnf
[mysqld]
#数据存储目录
datadir=/data/mysql/data
socket=/var/lib/mysql/mysql.sock
#日志存储目录
log-error=/data/mysql/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
5、启动
systemctl start mysqld.service
systemctl enable mysqld.service
systemctl status mysqld.service
6、查看启动
ps -ef|grep mysql
ss -lntup|grep 3306
7、登录修改密码（是否修改密码根据实际要求）
#查看临时密码
$grep 'temporary password' /data/mysql/log/mysqld.log
#登录
$mysql -u root -p
#设置密码
mysql> set password="123456";
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements #mysql有密码复杂度要求
mysql> set password="eUok!3qdQ3Dk";
Query OK, 0 rows affected (0.01 sec)
3、主从部署
主节点操作（10.0.0.1）
修改 master 的配置（ my.cnf）加入下面的内容
$vi /etc/my.cnf
[mysqld]
log-bin=mysql-bin
# id 必须唯一！！！
server-id=2
重启
systemctl restart mysqld.service
创建同步用户
#指定了内网ip段
mysql> CREATE USER 'slave'@'10.0.0.%' IDENTIFIED BY 'gWOp^$8z9L2D';
授权
mysql> GRANT REPLICATION SLAVE ON *.* TO 'slave'@'10.0.0.%';
mysql> flush privileges;
查看状态
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 | 876 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
#记录下 File 和 Position 的值，之后要用到
从节点操作（10.0.0.2）
修改slave 的配置（ my.cnf）加入下面的内容
$vi /etc/my.cnf
[mysqld]
# id 必须唯一！！！
server-id=2
重启
systemctl restart mysqld.service
设置主节点参数(根据实际修改)
mysql> CHANGE MASTER TO
-> MASTER_HOST='10.0.0.1',
-> MASTER_USER='slave',
-> MASTER_PASSWORD='gWOp^$8z9L2D',
-> MASTER_LOG_FILE='mysql-bin.000001',
-> MASTER_LOG_POS=876;
开启主从
mysql> start slave;
查看状态
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for source to send event
Master_Host: 10.0.0.1
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 876
Relay_Log_File: middleware2-relay-bin.000002
Relay_Log_Pos: 326
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
#保证
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
4、反向主从
主节点操作（10.0.0.2）
mysql> CREATE USER 'slave'@'10.0.0.%' IDENTIFIED BY 'gWOp^$8z9L2D';
Query OK, 0 rows affected (0.01 sec)
mysql> GRANT REPLICATION SLAVE ON *.* TO 'slave'@'10.0.0.%';
Query OK, 0 rows affected (0.01 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 | 876 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
从节点操作（10.0.0.1）
mysql> stop slave;
Query OK, 0 rows affected, 2 warnings (0.00 sec)
mysql> CHANGE MASTER TO
-> MASTER_HOST='10.0.0.2',
-> MASTER_USER='slave',
-> MASTER_PASSWORD='gWOp^$8z9L2D',
-> MASTER_LOG_FILE='mysql-bin.000001',
-> MASTER_LOG_POS=876;
Query OK, 0 rows affected, 8 warnings (0.02 sec)
mysql> start slave;
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for source to send event
Master_Host: 10.0.0.2
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 876
Relay_Log_File: middleware1-relay-bin.000002
Relay_Log_Pos: 326
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
5、keepalived高可用
主节点操作（10.0.0.1）
安装keepalived
$yum install -y keepalived
$rpm -ql keepalived
/etc/keepalived
/etc/keepalived/keepalived.conf
/etc/sysconfig/keepalived
/usr/bin/genhash
/usr/lib/systemd/system/keepalived.service
/usr/libexec/keepalived
/usr/sbin/keepalived
/usr/share/doc/keepalived-1.3.5
修改配置文件
$vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id mysql
}
vrrp_script chk_mysql_port { #检测mysql服务是否在运行。有很多方式，比如进程，用脚本检测等等
script "/data/keepalived/chk_mysql.sh" #这里通过脚本监测
interval 5 #脚本执行间隔，每2s检测一次
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.200.16 #vip外网ip
}
track_script {
chk_mysql_port
}
}
创建chk_mysql.sh
$mkdir /data/keepalived
$vi /data/keepalived/chk_mysql.sh
#!/bin/bash
counter=$(netstat -na|grep "LISTEN"|grep "3306"|wc -l)
if [ "${counter}" -eq 0 ]; then
systemctl stop keepalived
fi
$chmod +x /data/keepalived/chk_mysql.sh
$chmod 777 /data/keepalived/chk_mysql.sh
启动服务
systemctl start keepalived.service
systemctl status keepalived.service
systemctl stop keepalived.service
systemctl enable keepalived.service
systemctl restart keepalived.service
查看vip
$ip a|grep eth0
2: eth0: mtu 1450 qdisc mq state UP group default qlen 1000
inet 10.0.0.1/20 brd 10.0.111.255 scope global noprefixroute dynamic eth0
inet 192.168.200.16/32 scope global eth0
从节点操作（10.0.0.2）
安装keepalived
$yum install -y keepalived
$rpm -ql keepalived
/etc/keepalived
/etc/keepalived/keepalived.conf
/etc/sysconfig/keepalived
/usr/bin/genhash
/usr/lib/systemd/system/keepalived.service
/usr/libexec/keepalived
/usr/sbin/keepalived
/usr/share/doc/keepalived-1.3.5
修改配置文件
$vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id mysql
}
vrrp_script chk_mysql_port { #检测mysql服务是否在运行。有很多方式，比如进程，用脚本检测等等
script "/data/keepalived/chk_mysql.sh" #这里通过脚本监测
interval 5 #脚本执行间隔，每2s检测一次
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.200.16 #vip外网ip
}
track_script {
chk_mysql_port
}
}
创建chk_mysql.sh
$mkdir /data/keepalived
$vi /data/keepalived/chk_mysql.sh
#!/bin/bash
counter=$(netstat -na|grep "LISTEN"|grep "3306"|wc -l)
if [ "${counter}" -eq 0 ]; then
systemctl stop keepalived
fi
$chmod +x /data/keepalived/chk_mysql.sh
$chmod 777 /data/keepalived/chk_mysql.sh
启动服务
systemctl start keepalived.service
systemctl status keepalived.service
systemctl stop keepalived.service
systemctl enable keepalived.service
查看vip（master停止时）
$ip a|grep eth0
2: eth0: mtu 1450 qdisc mq state UP group default qlen 1000
inet 10.0.0.2/20 brd 10.0.111.255 scope global noprefixroute dynamic eth0
inet 192.168.200.16/32 scope global eth0