本文介绍mysql 8版本下的Innodb Cluster配置与测试过程，其核心还是mysql的组复制功能，通过使用mysql shell简化了组复制的配置过程，同时使用mysql route中间件实现了故障的自动转移以及读写分离等功能。之前测试mysql组复制的时候有提出过中间件的问题，mysql-route是个不错的解决方案，前文传送门：https://blog.51cto.com/ylw6006/1976829
一、环境介绍
操作系统：centos linux 7.2 64bit
mysql社区版: 8.0.11
mysql shell版本：8.0.11
mysql route版本：8.0.11
二、下载软件包
1、mysql
https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.11-linux-glibc2.12-x86_64.tar.gz2、mysql-router
https://cdn.mysql.com//Downloads/MySQL-Router/mysql-router-8.0.11-linux-glibc2.12-x86-64bit.tar.gz3、mysql-shell
https://cdn.mysql.com//Downloads/MySQL-Shell/mysql-shell-8.0.11-linux-glibc2.12-x86-64bit.tar.gz
三、安装软件包
（其他两台主机同步配置）
1、配置hosts文件
# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.115.5 vm1
192.168.115.6 vm2
192.168.115.7 vm3
2、安装mysql-shell
# tar -zxvpf mysql-shell-8.0.11-linux-glibc2.12-x86-64bit.tar.gz -C /usr/local/
# cd /usr/local/
# ln -s mysql-shell-8.0.11-linux-glibc2.12-x86-64bit/ mysql-shell
3、安装mysql-route
# tar -zxvpf mysql-router-8.0.11-linux-glibc2.12-x86-64bit.tar.gz -C /usr/local/
# cd /usr/local/
# ln -s mysql-router-8.0.11-linux-glibc2.12-x86-64bit/ mysql-router
4、安装和初始化mysql
# tar -zxvpf mysql-8.0.11-linux-glibc2.12-x86_64.tar.gz -C /usr/local/
# cd /usr/local/
# ln -s mysql-8.0.11-linux-glibc2.12-x86_64/ mysql
# groupadd -g 27 mysql
# useradd -g mysql -u 27 -d /dev/null -s /sbin/nologin mysql
# mkdir -p /mydata
# chown -R mysql.mysql /mydata/
# cat /usr/local/mysql/my.cnf
[client]
password = 123456
[mysqld]
innodb_buffer_pool_size = 256M
socket = /tmp/mysql.sock
skip-external-locking
key_buffer_size = 100M
max_allowed_packet = 1M
table_open_cache = 256
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 16M
thread_cache_size = 4
max_connections=1500
character_set_server=utf8
group_concat_max_len=65535
log_bin_trust_function_creators=1
log_queries_not_using_indexes = ON
log_throttle_queries_not_using_indexes = 2
log-bin=mysql-bin
binlog_format=row
default_authentication_plugin = mysql_native_password
long_query_time=2
slow_query_log=1
slow_query_log_file=/mydata/slow-query.log
ft_min_word_len=1
innodb_ft_min_token_size=1
server-id=1155
lower_case_table_names = 1
skip-name-resolve
innodb_file_per_table=1
gtid_mode = ON
enforce_gtid_consistency = ON
slave_parallel_workers=4
master_verify_checksum = 1
slave_sql_verify_checksum = 1
log-slave-updates=true
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
slave-parallel-type=LOGICAL_CLOCK
slave-preserve-commit-order=ON
master_info_repository = TABLE
relay_log_info_repository = TABLE
# /usr/local/mysql/bin/mysqld --defaults-file=/usr/local/mysql/my.cnf --initialize --user=mysql --basedir=/usr/local/mysql/ --datadir=/mydata --initialize-insecure
# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
# egrep 'basedir|datadir' /etc/init.d/mysqld |head -n 5
# basedir=
# - Add the path to the mysql-installation-directory to the basedir variable
# If you change base dir, you must also change datadir. These may get
basedir=/usr/local/mysql
datadir=/mydata
# chmod +x /etc/init.d/mysqld
# chkconfig --add mysqld
# mv /etc/my.cnf /etc/my.cnf.bak
# ln -s /usr/local/mysql/my.cnf /etc/
# service mysqld start
mysql> set sql_log_bin=0;
mysql> update mysql.user set host='%' where user='root';
mysql> alter user 'root'@'localhost' identified with mysql_native_password by '123456';
mysql> create user test@'%' identified by '123456';
mysql> grant all privileges on *.* to test@'%';
mysql> flush privileges;
mysql> set sql_log_bin=1; 四、检查配置
vm1执行即可
使用JS命令，检查每台服务器的配置。三台服务的mysql都要执行检查
# /usr/local/mysql-shell/bin/mysqlsh
MySQL JS > dba.checkInstanceConfiguration('test@vm1:3306')
Please provide the password for 'test@vm1:3306': ******
Validating local MySQL instance listening at port 3306 for use in an InnoDB cluster...
This instance reports its own address as vm1
Clients and other cluster members will communicate with it through this address by default. If this is not correct, the report_host MySQL system variable should be changed.
Checking whether existing tables comply with Group Replication requirements...
No incompatible tables detected
Checking instance configuration...
Instance configuration is compatible with InnoDB cluster
The instance 'vm1:3306' is valid for InnoDB cluster usage.
{
"status": "ok"
}
执行 dba.checkInstanceConfiguration，当输出 "status": "ok"的时候，表示该服务器检查通过五、创建组复制
vm1执行即可
# /usr/local/mysql-shell/bin/mysqlsh --uri test@vm1:3306
MySQL vm1:3306 ssl JS > var cluster = dba.createCluster('main')
A new InnoDB cluster will be created on instance 'root@vm1:3306'.
Validating instance at vm1:3306...
This instance reports its own address as vm1
Instance configuration is suitable.
Creating InnoDB cluster 'main' on 'root@vm1:3306'...
Adding Seed Instance...
Cluster successfully created. Use Cluster.addInstance() to add MySQL instances.
At least 3 instances are needed for the cluster to be able to withstand up to
one server failure.
JS > cluster.addInstance('root@vm2:3306')
JS > cluster.addInstance('root@vm3:3306')
MySQL vm1:3306 ssl JS > cluster.status()
{
"clusterName": "main",
"defaultReplicaSet": {
"name": "default",
"primary": "vm1:3306",
"ssl": "REQUIRED",
"status": "OK",
"statusText": "Cluster is ONLINE and can tolerate up to ONE failure.",
"topology": {
"vm1:3306": {
"address": "vm1:3306",
"mode": "R/W",
"readReplicas": {},
"role": "HA",
"status": "ONLINE"
},
"vm2:3306": {
"address": "vm2:3306",
"mode": "R/O",
"readReplicas": {},
"role": "HA",
"status": "ONLINE"
},
"vm3:3306": {
"address": "vm3:3306",
"mode": "R/O",
"readReplicas": {},
"role": "HA",
"status": "ONLINE"
}
}
},
"groupInformationSourceMember": "mysql://root@vm1:3306"
}六、配置mysql-route
vm1执行即可
# useradd mysql-router
# /usr/local/mysql-router/bin/mysqlrouter --bootstrap root@vm3:3306 --user mysql-router --directory /data/mysqlrouter --user=root --conf-use-sockets --force
Please enter MySQL password for root:
Reconfiguring MySQL Router instance at '/data/mysqlrouter'...
MySQL Router has now been configured for the InnoDB cluster 'main'.
The following connection information can be used to connect to the cluster.
Classic MySQL protocol connections to cluster 'main':
- Read/Write Connections: localhost:6446
- Read/Write Connections: /data/mysqlrouter/mysql.sock
- Read/Only Connections: localhost:6447
- Read/Only Connections: /data/mysqlrouter/mysqlro.sock
X protocol connections to cluster 'main':
- Read/Write Connections: localhost:64460
- Read/Write Connections: /data/mysqlrouter/mysqlx.sock
- Read/Only Connections: localhost:64470
- Read/Only Connections: /data/mysqlrouter/mysqlxro.sock
# /data/mysqlrouter/start.sh
# netstat -anpt |grep router
tcp 0 0 0.0.0.0:64460 0.0.0.0:* LISTEN 4865/mysqlrouter
tcp 0 0 0.0.0.0:6446 0.0.0.0:* LISTEN 4865/mysqlrouter
tcp 0 0 0.0.0.0:6447 0.0.0.0:* LISTEN 4865/mysqlrouter
tcp 0 0 0.0.0.0:64470 0.0.0.0:* LISTEN 4865/mysqlrouter
tcp 0 0 192.168.115.5:6446 192.168.115.1:63131 ESTABLISHED 4865/mysqlrouter
tcp 0 0 192.168.115.5:36458 192.168.115.5:3306 ESTABLISHED 4865/mysqlrouter
tcp 0 0 192.168.115.5:46488 192.168.115.7:3306 ESTABLISHED 4865/mysqlrouter 七、连接测试
[root@vm1 ~]# /usr/local/mysql/bin/mysql -u root -h 192.168.115.5 -P 6446 -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 87
Server version: 8.0.11 MySQL Community Server - GPL
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> SELECT @@port;
+--------+
| @@port |
+--------+
| 3306 |
+--------+
1 row in set (0.00 sec)
mysql> select user,host from mysql.user;
+----------------------------------+-----------+
| user | host |
+----------------------------------+-----------+
| mysql_innodb_cluster_r0467305354 | % |
| mysql_innodb_cluster_r0467308990 | % |
| mysql_innodb_cluster_r0467310325 | % |
| mysql_router1_2x0gxmyjbatp | % |
| mysql_router1_x017h4ui76aq | % |
| root | % |
| test | % |
| mysql.infoschema | localhost |
| mysql.session | localhost |
| mysql.sys | localhost |
| mysql_innodb_cluster_r0467286081 | localhost |
| mysql_innodb_cluster_r0467305354 | localhost |
| mysql_innodb_cluster_r0467308990 | localhost |
| mysql_innodb_cluster_r0467310325 | localhost |
+----------------------------------+-----------+
14 rows in set (0.00 sec)
[root@vm1 ~]# /usr/local/mysql/bin/mysql -u root -h 192.168.115.5 -P 6447 -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 233
Server version: 8.0.11 MySQL Community Server - GPL
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create database yang;
ERROR 1290 (HY000): The MySQL server is running with the --super-read-only option so it cannot execute this statement
mysql> select * from performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
| group_replication_applier | 7c8712b3-8b2c-11e8-b41f-000c2994965c | vm1 | 3306 | ONLINE | SECONDARY | 8.0.11 |
| group_replication_applier | 862443de-8b2c-11e8-bf4c-000c29c9b5f9 | vm3 | 3306 | ONLINE | PRIMARY | 8.0.11 |
| group_replication_applier | 8852b2af-8b2c-11e8-8487-000c2971a45f | vm2 | 3306 | ONLINE | SECONDARY | 8.0.11 |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
3 rows in set (0.37 sec)