1、在 Centos01 上配置 NTP 时间服务器同步时间
1）挂载系统光盘 yum 安装时间服务器
[root@centos01 ~]# mount /dev/cdrom /mnt/
mount: /dev/sr0 写保护，将以只读方式挂载
[root@centos01 ~]# rm -rf /etc/yum.repos.d/CentOS-*
[root@centos01 ~]# cat /etc/yum.repos.d/local.repo
[local]
name=centos
baseurl=file:///mnt
enabled=1
gpgcheck=0
[root@centos01 ~]# yum -y install ntp
2）修改时间服务器配置文件
root@centos01 ~]# vim /etc/ntp.conf
18 restrict 192.168.100.0 mask 255.255.255.0 nomodify notrap
19 server 127.127.1.0
20 fudge 127.127.1.0 stratum 8
3）重新启动服务设置开启自动启动
[root@centos01 ~]# systemctl restart ntpd
[root@centos01 ~]# systemctl enable ntpd
4）从库和延时从库同步时间
[root@centos02 ~]# ntpdate 192.168.100.10
2 Mar 17:15:21 ntpdate[9744]: adjust time server 192.168.100.10 offset -0.010884 sec[root@centos03 ~]# ntpdate 192.168.100.10
2 Mar 17:15:28 ntpdate[3350]: adjust time server 192.168.100.10 offset -0.007429 sec
2、安装主 Mysql 数据库
1）安装 Mysql
[root@centos01 ~]# tar zxf mysql-8.0.32-el7-x86_64.tar.gz -C /usr/src/
[root@centos01 ~]# mv /usr/src/mysql-8.0.32-el7-x86_64/ /usr/local/mysql
2）创建管理 Mysql 用户
root@centos01 ~]# groupadd mysql
[root@centos01 ~]# useradd -M -s /sbin/nologin -g mysql mysql
3）优化 Mysql 命令
[root@centos01 ~]# echo "PATH=$PATH:/usr/local/mysql/bin/" >> /etc/profile
[root@centos01 ~]# source /etc/profile
4）创建数据和日志存储目录
[root@centos01 ~]# mkdir /usr/local/mysql/date
[root@centos01 ~]# mkdir /usr/local/mysql/mysql-bin/
[root@centos01 ~]# chown -R mysql:mysql /usr/local/mysql/
5）生成 mysql 服务配置文件
[root@centos01 ~]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
[root@centos01 ~]# chmod +x /etc/init.d/mysqld
6）添加系统服务设置开机自动启动
[root@centos01 ~]# chkconfig --add mysqld
[root@centos01 ~]# chkconfig --level 35 mysqld on
7）修改主 Mysql 数据库配置文件
[root@centos01 ~]# vim /proc/sys/kernel/random/uuid
996ae938-6650-48d5-8e21-f030ece7c93d
[root@centos01 ~]# vim /etc/my.cnf[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306
log-bin=/usr/local/mysql/mysql-bin/mysql-master-bin
log_replica_updates=1
server-id=10
secure-file-priv=/tmp
binlog_format=row
gtid-mode=on
enforce-gtid-consistency=true
skip_name_resolve
default_authentication_plugin=mysql_native_password //加载密码插件
binlog_checksum=NONE
binlog_transaction_dependency_tracking=WRITESET
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="996ae938-6650-48d5-8e21-f030ece7c93d" //复制组
名字
loose-group_replication_start_on_boot=OFF //进制自动启动复制
组
loose-group_replication_local_address="192.168.100.10:33061"loose
group_replication_group_seeds="192.168.100.10:33061,192.168.100.20:33062,192.168.100
.30:33063"
loose-group_replication_bootstrap_group=OFF
8）初始化 Mysql 数据库
[root@centos01 ~]# mysqld --initialize-insecure
2023-03-05T08:24:39.842307Z 0 [Warning] [MY-011069] [Server] The syntax '--
transaction-write-set-extraction' is deprecated and will be removed in a future
release.
2023-03-05T08:24:39.842549Z 0 [Warning] [MY-010918] [Server]
'default_authentication_plugin' is deprecated and will be removed in a future
release. Please use authentication_policy instead.
2023-03-05T08:24:39.842613Z 0 [System] [MY-013169] [Server]
/usr/local/mysql/bin/mysqld (mysqld 8.0.32) initializing of server in progress as
process 7504
2023-03-05T08:24:39.865072Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization
has started.
2023-03-05T08:24:40.955156Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization
has ended.
2023-03-05T08:24:42.975603Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_group_name=996ae938-6650-48d5-8e21-f030ece7c93d'.
2023-03-05T08:24:42.975635Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_start_on_boot=OFF'.
2023-03-05T08:24:42.975653Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_local_address=192.168.100.10:33061'.2023-03-05T08:24:42.975671Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose
group_replication_group_seeds=192.168.100.10:33061,192.168.100.20:33062,192.168.100.
30:33063'.
2023-03-05T08:24:42.975689Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_bootstrap_group=OFF'.
2023-03-05T08:24:42.977876Z 6 [Warning] [MY-010453] [Server] root@localhost is
created with an empty password ! Please consider switching off the --initialize
insecure option.
9）启动 Mysql 服务
[root@centos01 ~]# systemctl start mysqld
[root@centos01 ~]# netstat -anptu | grep 3306
tcp6 0 0 :::33060 :::* LISTEN 4549/mysqld
tcp6 0 0 :::3306 :::* LISTEN 4549/mysqld
3、安装第一台从 Mysql 数据库
1）安装 Mysql
[root@centos02 ~]# tar zxf mysql-8.0.32-el7-x86_64.tar.gz -C /usr/src/
[root@centos02 ~]# mv /usr/src/mysql-8.0.32-el7-x86_64/ /usr/local/mysql
2）创建管理 Mysql 用户
[root@centos02 ~]# groupadd mysql
[root@centos02 ~]# useradd -M -s /sbin/nologin -g mysql
mysql
3）优化 Mysql 命令
[root@centos02 ~]# echo "PATH=$PATH:/usr/local/mysql/bin/" >> /etc/profile
[root@centos02 ~]# source /etc/profile
4）创建数据和日志存储目录
[root@centos02 ~]# mkdir /usr/local/mysql/date
[root@centos02 ~]# mkdir /usr/local/mysql/mysql-bin/
[root@centos02 ~]# chown -R mysql:mysql /usr/local/mysql/
5）生成 mysql 服务配置文件
[root@centos02 ~]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
[root@centos02 ~]# chmod +x /etc/init.d/mysqld
6）添加系统服务设置开机自动启动
[root@centos02 ~]# chkconfig --add mysqld
[root@centos02 ~]# chkconfig --level 35 mysqld on
7）修改主 Mysql 数据库配置文件
[root@centos02 ~]# vim /etc/my.cnf
[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306
log-bin=/usr/local/mysql/mysql-bin/mysql-master-bin
log_replica_updates=1
server-id=20
secure-file-priv=/tmp
binlog_format=row
gtid-mode=on
enforce-gtid-consistency=true
skip_name_resolve //跳过DNS反向解析default_authentication_plugin=mysql_native_password //加载密码加密工具
binlog_checksum=NONE
binlog_transaction_dependency_tracking=WRITESET
transaction_write_set_extraction=XXHASH64 //事务读写结合使用sha算法加密
loose-group_replication_group_name="996ae938-6650-48d5-8e21-f030ece7c93d" //配置复
制组名字
loose-group_replication_start_on_boot=OFF //启动服务不自动启动复制组
loose-group_replication_local_address="192.168.100.20:33062" //接收其他组成员连接
loose
group_replication_group_seeds="192.168.100.10:33061,192.168.100.20:33062,192.168.100
.30:33063" //允许一下IP地址和端口连接
loose-group_replication_bootstrap_group=OFF //不需要配置为引导组
8）初始化 Mysql 数据库
[root@centos02 ~]# mysqld --initialize-insecure
2023-03-05T08:25:32.766501Z 0 [Warning] [MY-011069] [Server] The syntax '--
transaction-write-set-extraction' is deprecated and will be removed in a future
release.
2023-03-05T08:25:32.766672Z 0 [Warning] [MY-010918] [Server]
'default_authentication_plugin' is deprecated and will be removed in a future
release. Please use authentication_policy instead.
2023-03-05T08:25:32.766713Z 0 [System] [MY-013169] [Server]
/usr/local/mysql/bin/mysqld (mysqld 8.0.32) initializing of server in progress as
process 15382
2023-03-05T08:25:32.784985Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization
has started.2023-03-05T08:25:33.761875Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization
has ended.
2023-03-05T08:25:35.326136Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_group_name=996ae938-6650-48d5-8e21-f030ece7c93d'.
2023-03-05T08:25:35.326168Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_start_on_boot=OFF'.
2023-03-05T08:25:35.326186Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_local_address=192.168.100.20:33062'.
2023-03-05T08:25:35.326204Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose
group_replication_group_seeds=192.168.100.10:33061,192.168.100.20:33062,192.168.100.
30:33063'.
2023-03-05T08:25:35.326222Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_bootstrap_group=OFF'.
2023-03-05T08:25:35.328305Z 6 [Warning] [MY-010453] [Server] root@localhost is
created with an empty password ! Please consider switching off the --initialize
insecure option.
9）启动 Mysql 服务
[root@centos02 ~]# systemctl start mysqld
[root@centos02 ~]# netstat -anptu | grep 3306
tcp6 0 0 :::33060 :::* LISTEN 4549/mysqld
tcp6 0 0 :::3306 :::* LISTEN 4549/mysqld
4、安装第二台从 Mysql 数据库
1）安装 Mysql
[root@centos03 ~]# tar zxf mysql-8.0.32-el7-x86_64.tar.gz -C /usr/src/
[root@centos03 ~]# mv /usr/src/mysql-8.0.32-el7-x86_64/ /usr/local/mysql
2）创建管理 Mysql 用户
[root@centos03 ~]# groupadd mysql
[root@centos03 ~]# useradd -M -s /sbin/nologin -g mysql mysql
3）优化 Mysql 命令
[root@centos03 ~]# echo "PATH=$PATH:/usr/local/mysql/bin/" >> /etc/profile
[root@centos03 ~]# source /etc/profile
4）创建数据和日志存储目录
[root@centos03 ~]# mkdir /usr/local/mysql/date
[root@centos03 ~]# mkdir /usr/local/mysql/mysql-bin/
[root@centos03 ~]# chown -R mysql:mysql /usr/local/mysql/
5）生成 mysql 服务配置文件
[root@centos03 ~]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
[root@centos03 ~]# chmod +x /etc/init.d/mysqld
6）添加系统服务设置开机自动启动
[root@centos03 ~]# chkconfig --add mysqld
[root@centos03 ~]# chkconfig --level 35 mysqld on
7）修改主 Mysql 数据库配置文件
[root@centos03 ~]# vim /etc/my.cnf
[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306log-bin=/usr/local/mysql/mysql-bin/mysql-master-bin
log_replica_updates=1
server-id=30
secure-file-priv=/tmp
binlog_format=row
gtid-mode=on
enforce-gtid-consistency=true
skip_name_resolve
default_authentication_plugin=mysql_native_password
binlog_checksum=NONE
binlog_transaction_dependency_tracking=WRITESET
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="996ae938-6650-48d5-8e21-f030ece7c93d"
loose-group_replication_start_on_boot=OFF
loose-group_replication_local_address="192.168.100.30:33063"
loose
group_replication_group_seeds="192.168.100.10:33061,192.168.100.20:33062,192.168.100
.30:33063"
loose-group_replication_bootstrap_group=OFF
8）初始化 Mysql 数据库
[root@centos03 ~]# mysqld --initialize-insecure
2023-03-05T08:26:17.023471Z 0 [Warning] [MY-011069] [Server] The syntax '--
transaction-write-set-extraction' is deprecated and will be removed in a future
release.2023-03-05T08:26:17.023640Z 0 [Warning] [MY-010918] [Server]
'default_authentication_plugin' is deprecated and will be removed in a future
release. Please use authentication_policy instead.
2023-03-05T08:26:17.023681Z 0 [System] [MY-013169] [Server]
/usr/local/mysql/bin/mysqld (mysqld 8.0.32) initializing of server in progress as
process 15872
2023-03-05T08:26:17.044102Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization
has started.
2023-03-05T08:26:18.065281Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization
has ended.
2023-03-05T08:26:19.888955Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_group_name=996ae938-6650-48d5-8e21-f030ece7c93d'.
2023-03-05T08:26:19.888985Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_start_on_boot=OFF'.
2023-03-05T08:26:19.889003Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_local_address=192.168.100.30:33063'.
2023-03-05T08:26:19.889020Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose
group_replication_group_seeds=192.168.100.10:33061,192.168.100.20:33062,192.168.100.
30:33063'.
2023-03-05T08:26:19.889038Z 0 [Warning] [MY-000067] [Server] unknown variable
'loose-group_replication_bootstrap_group=OFF'.2023-03-05T08:26:19.891231Z 6 [Warning] [MY-010453] [Server] root@localhost is
created with an empty password ! Please consider switching off the --initialize
insecure option.
9）启动 Mysql 服务
[root@centos03 ~]# systemctl start mysqld
[root@centos03 ~]# netstat -anptu | grep 3306
tcp6 0 0 :::33060 :::* LISTEN 4549/mysqld
tcp6 0 0 :::3306 :::* LISTEN 4549/mysqld
5、修改 hosts 文件
1）修改第一台 Mysql 数据库 hosts 文件
[root@centos01 ~]# vim /etc/hosts
192.168.100.10 centos01
192.168.100.20 centos02
192.168.100.30 centos03
2）将 hosts 文件复制到第二台 Mysql 服务器
[root@centos01 ~]# scp /etc/hosts root@192.168.100.20:/etc/
3）将 hosts 文件复制到第三台 Mysql 服务器
[root@centos01 ~]# scp /etc/hosts root@192.168.100.30:/etc/
二、在 Mysql 中配置单主多从复制组
1、在所有 Mysql 节点开启 Mysql 组复制功能
1）在主 Mysql 节点上安装 MGR 组复制插件创建授权访问用户
[root@centos01 ~]# mysqladmin -uroot password
New password:
Confirm new password:[root@centos01 ~]# mysql -uroot -ppwd@123 -e "install plugin group_replication
soname 'group_replication.so';"
[root@centos01 ~]# mysql -uroot -ppwd@123
mysql> set sql_log_bin=0;
mysql> create user repl@'%' identified by 'pwd@123';
mysql> create user repl@'localhost' identified by 'pwd@123';
mysql> create user repl@'127.0.0.1' identified by 'pwd@123';
mysql> grant replication slave,replication client on *.* to repl@'%';
mysql> grant replication slave,replication client on *.* to repl@'localhost';
mysql> grant replication slave,replication client on *.* to repl@'127.0.0.1';
mysql> flush privileges;
mysql> set sql_log_bin=1;
2）在第一台从 Mysql 节点上安装 MGR 组复制插件创建授权访问用户
[root@centos02 ~]# mysqladmin -uroot password
New password:
Confirm new password:
[root@centos01 ~]# mysql -uroot -ppwd@123 -e "install plugin group_replication
soname 'group_replication.so';"
[root@centos02 ~]# mysql -uroot -ppwd@123
mysql> set sql_log_bin=0;
mysql> create user repl@'%' identified by 'pwd@123';
mysql> create user repl@'localhost' identified by 'pwd@123';
mysql> create user repl@'127.0.0.1' identified by 'pwd@123';
mysql> grant replication slave,replication client on *.* to repl@'%';
mysql> grant replication slave,replication client on *.* to repl@'localhost';mysql> grant replication slave,replication client on *.* to repl@'127.0.0.1';
mysql> flush privileges;
mysql> set sql_log_bin=1;
3）在第二台从 Mysql 节点上安装 MGR 复制插件创建授权访问用户
[root@centos03 ~]# mysqladmin -uroot password
New password:
Confirm new password:
[root@centos03 ~]# mysql -uroot -ppwd@123 -e "install plugin group_replication
soname 'group_replication.so';"
[root@centos01 ~]# mysql -uroot -ppwd@123
mysql> set sql_log_bin=0;
mysql> create user repl@'%' identified by 'pwd@123';
mysql> create user repl@'localhost' identified by 'pwd@123';
mysql> create user repl@'127.0.0.1' identified by 'pwd@123';
mysql> grant replication slave,replication client on *.* to repl@'%';
mysql> grant replication slave,replication client on *.* to repl@'localhost';
mysql> grant replication slave,replication client on *.* to repl@'127.0.0.1';
mysql> flush privileges;
mysql> set sql_log_bin=1;
2、在主 Mysql 服务器配置为群集引导节点将两个从 Mysql 加入复制群集验
证
1）配置主 Mysql 为 MGR 群集引导节点
[root@centos01 ~]# mysql -uroot -ppwd@123mysql> change master to master_user='repl',master_password='pwd@123' for channel
'group_replication_recovery';
Query OK, 0 rows affected, 5 warnings (0.02 sec)
mysql> set global group_replication_bootstrap_group=on; //设置引导组启动
Query OK, 0 rows affected (0.00 sec)
mysql> start group_replication; //启动复制组
Query OK, 0 rows affected (1.43 sec)
mysql> set global group_replication_bootstrap_group=off; //设置关闭引导组
Query OK, 0 rows affected (0.00 sec)
mysql> select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------
+-------------+--------------+-------------+----------------+-----------------------
-----+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST |
MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
MEMBER_COMMUNICATION_STACK |
+---------------------------+--------------------------------------+----------------
+-------------+--------------+-------------+----------------+-----------------------
-----+
| group_replication_applier | ff85a6dd-bafd-11ed-b7e8-000c294cc769 | 192.168.100.10
| 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
+---------------------------+--------------------------------------+----------------
+-------------+--------------+-------------+----------------+-----------------------
-----+1 row in set (0.01 sec)
2）将第一台从 Mysql 加入到群集中
mysql> reset master;
Query OK, 0 rows affected (0.01 sec)
mysql> change master to master_user='repl',master_password='pwd@123' for channel
'group_replication_recovery';
Query OK, 0 rows affected, 5 warnings (0.02 sec)
mysql> start group_replication;
Query OK, 0 rows affected (3.17 sec)
3）将第二台从 Mysql 加入到群集中
mysql> reset master;
Query OK, 0 rows affected (0.01 sec)
mysql> change master to master_user='repl',master_password='pwd@123' for channel
'group_replication_recovery';
Query OK, 0 rows affected, 5 warnings (0.02 sec)
mysql> start group_replication;
Query OK, 0 rows affected (2.34 sec)
4）查看创建的 Mysql 组复制群集
[root@centos01 ~]# mysql -uroot -ppwd@123
mysql> select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------
+-------------+--------------+-------------+----------------+-----------------------
-----+| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST |
MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
MEMBER_COMMUNICATION_STACK |
+---------------------------+--------------------------------------+----------------
+-------------+--------------+-------------+----------------+-----------------------
-----+
| group_replication_applier | f08b8188-bafa-11ed-89a5-000c29bdb4a4 | 192.168.100.20
| 3306 | ONLINE | SECONDARY | 8.0.32 | XCom |
| group_replication_applier | fc73f235-bafa-11ed-9eed-000c2962859c | 192.168.100.30
| 3306 | ONLINE | SECONDARY | 8.0.32 | XCom |
| group_replication_applier | ff85a6dd-bafd-11ed-b7e8-000c294cc769 | 192.168.100.10
| 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
+---------------------------+--------------------------------------+----------------
+-------------+--------------+-------------+----------------+-----------------------
-----+
3 rows in set (0.00 sec)
3、验证 MGR 复制
1）停止主 mysql 服务指定选举新的主节点
[root@centos01 ~]# systemctl stop mysqld
[root@centos02 ~]# mysql -uroot -ppwd@123
mysql> select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION | MEMBER_COMMUNICATION_STACK |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| group_replication_applier | f08b8188-bafa-11ed-89a5-000c29bdb4a4 | 192.168.100.20 | 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
| group_replication_applier | fc73f235-bafa-11ed-9eed-000c2962859c | 192.168.100.30 | 3306 | ONLINE | SECONDARY | 8.0.32 | XCom |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
2 rows in set (0.00 sec)2）在线修改主节点
mysql> select group_replication_set_as_primary('fc73f235-bafa-11ed-9eed-000c2962859c');
+--------------------------------------------------------------------------+
| group_replication_set_as_primary('fc73f235-bafa-11ed-9eed-000c2962859c') |
+--------------------------------------------------------------------------+
| Primary server switched to: fc73f235-bafa-11ed-9eed-000c2962859c |
+--------------------------------------------------------------------------+
1 row in set (0.07 sec)
mysql> select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION | MEMBER_COMMUNICATION_STACK |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| group_replication_applier | f08b8188-bafa-11ed-89a5-000c29bdb4a4 | 192.168.100.20| 3306 | ONLINE | SECONDARY | 8.0.32 | XCom |
| group_replication_applier | fc73f235-bafa-11ed-9eed-000c2962859c | 192.168.100.30 | 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
| group_replication_applier | ff85a6dd-bafd-11ed-b7e8-000c294cc769 | 192.168.100.10 | 3306 | ONLINE | SECONDARY | 8.0.32 | XCom |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
3 rows in set (0.01 sec)
3）从单主模式修改为多主模式
mysql> select group_replication_switch_to_multi_primary_mode();
//多主模式
+--------------------------------------------------+
| group_replication_switch_to_multi_primary_mode() |
+--------------------------------------------------+
| Mode switched to multi-primary successfully. |
+--------------------------------------------------+
1 row in set (0.01 sec)
mysql> select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION | MEMBER_COMMUNICATION_STACK |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| group_replication_applier | f08b8188-bafa-11ed-89a5-000c29bdb4a4 | 192.168.100.20| 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
| group_replication_applier | fc73f235-bafa-11ed-9eed-000c2962859c | 192.168.100.30 | 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
| group_replication_applier | ff85a6dd-bafd-11ed-b7e8-000c294cc769 | 192.168.100.10 | 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
3 rows in set (0.00 sec)
mysql> select group_replication_switch_to_single_primary_mode();
//修改为单主
模式
+---------------------------------------------------+
| group_replication_switch_to_single_primary_mode() |
+---------------------------------------------------+
| Mode switched to single-primary successfully. |
+---------------------------------------------------+
1 row in set (0.01 sec)mysql> select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION | MEMBER_COMMUNICATION_STACK |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| group_replication_applier | f08b8188-bafa-11ed-89a5-000c29bdb4a4 | 192.168.100.20 | 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
|group_replication_applier | fc73f235-bafa-11ed-9eed-000c2962859c | 192.168.100.30 | 3306 | ONLINE | SECONDARY | 8.0.32 | XCom |
| group_replication_applier | ff85a6dd-bafd-11ed-b7e8-000c294cc769 | 192.168.100.10 | 3306 | ONLINE | SECONDARY | 8.0.32 | XCom |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
3 rows in set (0.00 sec)
4、配置 MGR 多主复制
1）停止单主复制模式配置多主
[root@centos02 ~]# mysql -uroot -ppwd@123
mysql> stop group_replication;
Query OK, 0 rows affected (3.22 sec)
mysql> set global group_replication_single_primary_mode=off;
Query OK, 0 rows affected (0.00 sec)
mysql> set global group_replication_enforce_update_everywhere_checks=1;
Query OK, 0 rows affected (0.00 sec)
mysql> select
@@group_replication_single_primary_mode,@@group_replication_enforce_update_everywher
e_checks;
+-----------------------------------------+-----------------------------------------
-------------+
| @@group_replication_single_primary_mode |
@@group_replication_enforce_update_everywhere_checks |
+-----------------------------------------+-----------------------------------------
-------------+
| 0 | 1 |+-----------------------------------------+-----------------------------------------
-------------+
1 row in set (0.00 sec)
mysql> set global read_only=0; //关闭只读功能
Query OK, 0 rows affected (0.00 sec)
mysql> set global super_read_only=0;
Query OK, 0 rows affected (0.00 sec)
2）修改主 Mysql 数据库配置设置为引导节点
mysql> stop group_replication;
Query OK, 0 rows affected (3.25 sec)
mysql> set global group_replication_single_primary_mode=off;
Query OK, 0 rows affected (0.00 sec)
mysql> set global group_replication_enforce_update_everywhere_checks=on;
Query OK, 0 rows affected (0.00 sec)
mysql> set global group_replication_bootstrap_group=on;
Query OK, 0 rows affected (0.00 sec)
mysql> start group_replication;
Query OK, 0 rows affected (1.25 sec)
3）将第二个主节点添加到 Mysql 复制组群集
[root@centos02 ~]# mysql -uroot -ppwd@123
mysql> start group_replication;
Query OK, 0 rows affected (2.29 sec)
4）查看多主复制数据
mysql> select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION | MEMBER_COMMUNICATION_STACK |+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| group_replication_applier | f08b8188-bafa-11ed-89a5-000c29bdb4a4 | 192.168.100.20 | 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
| group_replication_applier | fc73f235-bafa-11ed-9eed-000c2962859c | 192.168.100.30 | 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
| group_replication_applier | ff85a6dd-bafd-11ed-b7e8-000c294cc769 | 192.168.100.10 | 3306 | ONLINE | PRIMARY | 8.0.32 | XCom |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
3 rows in set (0.00 sec)
