环境准备
vi /etc/hosts
192.168.0.211 node01
192.168.0.212 node02
192.168.0.213 node03
依赖包安装
在3个节点都执行
yum -y install jemalloc jemalloc-devel numactl
添加用户
在3个节点都执行
groupadd mysql
useradd -r -g mysql -s /bin/false mysql
目录
在3个节点都执行
mkdir -p /data/mysql/{data,binlog,relaylog,logs,tmp,conf}
chown -R mysql.mysql /data
软件下载
在3个节点都执行
MySQL：mysql-commercial-8.0.28-linux-glibc2.12-x86_64.tar.xz
MySQL Shell: mysq1-shell-commerciai-8.0.28-1.1.e17.x86_64.rpm
MySQL Router：mysql-router-commercial-8.0.28-linux-glibc2.12-x86_64.tar.xz
wget https://mirrors.aliyun.com/mysql/MySQL-8.0/mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz
wget https://downloads.mysql.com/archives/get/p/43/file/mysql-shell-8.0.28-1.el7.x86_64.rpm
wget https://downloads.mysql.com/archives/get/p/41/file/mysql-router-community-8.0.28-1.el7.x86_64.rpm
安装mysql,mysqlsh，mysql router等
在3个节点都执行
tar -xvf mysql-8.0.28-linux-glibc2.12-x86_64.tar.xz -C /usr/local/
ln -s /usr/local/mysql-8.0.28-linux-glibc2.12-x86_64 /usr/local/mysql
chown -R mysql.mysql /usr/local/mysql
ln -s /usr/local/mysql-8.0.28-linux-glibc2.12-x86_64/support-files/mysql.server /etc/init.d/mysql
ln -s /usr/local/mysql-8.0.28-linux-glibc2.12-x86_64/support-files/mysql.server /etc/init.d/mysqld
ln -s /usr/local/mysql-8.0.28-linux-glibc2.12-x86_64/bin/mysqladmin /usr/bin/mysqladmin
cp -rf /usr/local/mysql-8.0.28-linux-glibc2.12-x86_64/bin/mysql* /usr/bin/
vi /etc/profile
PATH=/usr/local/mysql/bin:$PATH
# mysql shell install
rpm -ivh https://downloads.mysql.com/archives/get/p/43/file/mysql-shell-8.0.28-1.el7.x86_64.rpm
# mysql router install
rpm -ivh https://downloads.mysql.com/archives/get/p/41/file/mysql-router-community-8.0.28-1.el7.x86_64.rpm
mysql配置文件
在3个节点都执行，server_id修改成对应的值
vi /data/mysql/conf/my.cnf
#配置文件
[client]
socket = /data/mysql/mysql.sock
[mysqld]
user = mysql
port = 3306
server_id = 211
basedir = /usr/local/mysql
datadir = /data/mysql/data
socket = /data/mysql/mysql.sock
pid-file = mysql.pid
character-set-server = UTF8MB4
skip_name_resolve = 1
default_time_zone = "+8:00"
#performance setttings
lock_wait_timeout = 3600
open_files_limit = 65535
back_log = 1024
max_connections = 5000
max_connect_errors = 1000000
table_open_cache = 2048
table_definition_cache = 2048
#log settings
log_timestamps = SYSTEM
log_error = /data/mysql/logs/error.log
log_error_verbosity = 3
log_bin = /data/mysql/binlog/log_bin
binlog_format = ROW
sync_binlog = 1
gtid_mode = ON
enforce_gtid_consistency = TRUE
数据库初始化
在3个节点都执行
#数据库初始化：
/usr/local/mysql/bin/mysqld --defaults-file=/data/mysql/conf/my.cnf --initialize-insecure
#启动mysqld进程了
/usr/local/mysql/bin/mysqld --defaults-file=/data/mysql/conf/my.cnf &
#设置密码
/usr/local/mysql/bin/mysql -hlocalhost -uroot -S /data/mysql/mysql.sock -p
ALTER USER 'root'@'localhost' IDENTIFIED with mysql_native_password BY '123456';
create user 'root'@'%' IDENTIFIED with mysql_native_password by '123456';
GRANT all privileges on *.* to 'root'@'%' ;
ln -s /data/mysql/mysql.sock /tmp/mysql.sock
mysql shell安装
创建mgr用户
在node01/node02/node03上执行
#只有本地登录才会有创建mgr用户选项(在node01,node02,node03上执行)
mysqlsh -S /data/mysql/mysql.sock root@localhost
dba.configureInstance();
1) Create remotely usable account for 'root' with same grants and password
2) Create a new admin account for InnoDB cluster with minimal required grants
3) Ignore and continue
4) Cancel
Please select an option [1]: 2
Please provide an account name (e.g: icroot@%) to have it created with the necessary
privileges or leave empty and press Enter to cancel.
Account Name: mgrusr
Password for new account: ******
Confirm password: ******
applierWorkerThreads will be set to the default value of 4.
NOTE: Some configuration options need to be fixed:
+----------------------------------------+---------------+----------------+----------------------------+
| Variable | Current Value | Required Value | Note |
+----------------------------------------+---------------+----------------+----------------------------+
| binlog_transaction_dependency_tracking | COMMIT_ORDER | WRITESET | Update the server variable |
+----------------------------------------+---------------+----------------+----------------------------+
Do you want to perform the required configuration changes? [y/n]: y
Cluster admin user 'mgrusr'@'%' created.
Configuring instance...
The instance 'node01:3306' was configured to be used in an InnoDB cluster.
创建MGR
在node01上执行
#创建用户后，退出重登录
mysqlsh --uri mgrusr@node01:3306
#创建MGR（node01上执行）
var c = dba.createCluster('mgrtest');
var c = dba.getCluster('mgrtest');
添加节点
#添加
c.addInstance('mgrusr@node02:3306');
继续添加节点
c.addInstance('mgrusr@node03:3306');
检查MGR状态
var c = dba.getCluster('mgrtest');
c.rescan();
c.describe();
c.status();
MySQL node01:3306 ssl JS > c.rescan();
Rescanning the cluster...
Result of the rescanning operation for the 'mgrtest' cluster:
{
"name": "mgrtest",
"newTopologyMode": null,
"newlyDiscoveredInstances": [],
"unavailableInstances": [],
"updatedInstances": []
}
MySQL node01:3306 ssl JS > c.describe();
{
"clusterName": "mgrtest",
"defaultReplicaSet": {
"name": "default",
"topology": [
{
"address": "node01:3306",
"label": "node01:3306",
"role": "HA"
},
{
"address": "node02:3306",
"label": "node02:3306",
"role": "HA"
},
{
"address": "node03:3306",
"label": "node03:3306",
"role": "HA"
}
],
"topologyMode": "Single-Primary"
}
}
MySQL node01:3306 ssl JS > c.status();
{
"clusterName": "mgrtest",
"defaultReplicaSet": {
"name": "default",
"primary": "node01:3306",
"ssl": "REQUIRED",
"status": "OK",
"statusText": "Cluster is ONLINE and can tolerate up to ONE failure.",
"topology": {
"node01:3306": {
"address": "node01:3306",
"memberRole": "PRIMARY",
"mode": "R/W",
"readReplicas": {},
"replicationLag": null,
"role": "HA",
"status": "ONLINE",
"version": "8.0.28"
},
"node02:3306": {
"address": "node02:3306",
"memberRole": "SECONDARY",
"mode": "R/O",
"readReplicas": {},
"replicationLag": null,
"role": "HA",
"status": "ONLINE",
"version": "8.0.28"
},
"node03:3306": {
"address": "node03:3306",
"memberRole": "SECONDARY",
"mode": "R/O",
"readReplicas": {},
"replicationLag": null,
"role": "HA",
"status": "ONLINE",
"version": "8.0.28"
}
},
"topologyMode": "Single-Primary"
},
"groupInformationSourceMember": "node01:3306"
}
切换SQL检查状态
\sql 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 | 07e68e0d-f8bb-11ee-9e27-080027e6c610 | node01 | 3306 | ONLINE | PRIMARY | 8.0.28 | XCom |
| group_replication_applier | 099a9ab9-f8bb-11ee-9ea3-080027e6c610 | node02 | 3306 | ONLINE | SECONDARY | 8.0.28 | XCom |
| group_replication_applier | 0ae4559e-f8bb-11ee-9cb9-080027e6c610 | node03 | 3306 | ONLINE | SECONDARY | 8.0.28 | XCom |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+----------------------------+
添加节点FAQ
检查/etc/hosts 正确
cat /etc/hosts
192.168.0.211 node01
192.168.0.212 node02
192.168.0.213 node03
确保server_id不重复，否则报错
Instance configuration is suitable.
ERROR: Cannot join instance 'node03:3306' to the cluster because it has the same server ID of a member of the cluster. Please change the server ID of the instance to add: all members must have a unique server ID.
Cluster.addInstance: The server_id '212' is already used by instance 'node02:3306'. (RuntimeError)
MySQL node01:3306 ssl JS > c.addInstance('mgrusr@node03:3306');
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