43 MySQL复制及Galera ClusterMHA

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01 mysql复制及MHA


实战：配置MHA


配置：

node1: MHA 192.168.1.130 CentOS7.2

node2：Master 192.168.1.131 CentOS7.2

node3：Slave  192.168.1.132 CentOS7.2

node4：Slave  192.168.1.133 CentOS7.2


一、准备mysql复制环境

[[email protected] ~]# yum -y install mariadb-server

[[email protected] ~]# vim /etc/my.cnf

添加

innodb_file_per_table = 1 

skip_name_resolve = 1 

log-bin = master-bin

relay-log = relay-bin

server_id = 1

[[email protected] ~]# systemctl start mariadb.service 

[[email protected] ~]# mysql

MariaDB [(none)]> SHOW MASTER STATUS;

+-------------------+----------+--------------+------------------+

| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |

+-------------------+----------+--------------+------------------+

| master-bin.000003 |      245 |              |                  |

+-------------------+----------+--------------+------------------+

MariaDB [(none)]> GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO ‘repluser‘@‘192.168.1.%‘ IDENTIFIED BY ‘replpass‘;

MariaDB [(none)]> FLUSH PRIVILEGES;

[[email protected] ~]# yum -y install mariadb-server

[[email protected] ~]#  yum -y install mariadb-server

[[email protected] ~]# vim /etc/my.cnf

添加

innodb_file_per_table = 1

skip_name_resolve = 1

log-bin = master-bin

relay-log = relay-bin

server_id = 2

read_only = 1

relay_log_purge = 0

[[email protected] ~]# scp /etc/my.cnf node4:/etc

[[email protected] ~]# vim /etc/my.cnf

修改

server_id = 2

为

server_id = 3

[[email protected] ~]# systemctl start mariadb.service 

[[email protected] ~]# mysql

MariaDB [(none)]> CHANGE MASTER TO MASTER_HOST=‘192.168.1.131‘,MASTER_USER=‘repluser‘,MASTER_PASSWORD=‘replpass‘,MASTER_LOG_FILE=‘master-bin.000003‘,MASTER_LOG_POS=245;

MariaDB [(none)]> START SLAVE;

Query OK, 0 rows affected (0.00 sec)


MariaDB [(none)]> SHOW SLAVE STATUS \G

*************************** 1. row ***************************

  Slave_IO_State: Waiting for master to send event

 Master_Host: 192.168.1.131

 Master_User: repluser

 Master_Port: 3306

Connect_Retry: 60

 Master_Log_File: master-bin.000003

 Read_Master_Log_Pos: 498

  Relay_Log_File: relay-bin.000002

Relay_Log_Pos: 783

Relay_Master_Log_File: master-bin.000003

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

[[email protected] ~]# systemctl start mariadb.service 

[[email protected] ~]# mysql

MariaDB [(none)]> CHANGE MASTER TO MASTER_HOST=‘192.168.1.131‘,MASTER_USER=‘repluser‘,MASTER_PASSWORD=‘replpass‘,MASTER_LOG_FILE=‘master-bin.000003‘,MASTER_LOG_POS=245;

MariaDB [(none)]> START SLAVE;

Query OK, 0 rows affected (0.00 sec)


MariaDB [(none)]> SHOW SLAVE STATUS \G

*************************** 1. row ***************************

  Slave_IO_State: Waiting for master to send event

 Master_Host: 192.168.1.131

 Master_User: repluser

 Master_Port: 3306

Connect_Retry: 60

 Master_Log_File: master-bin.000003

 Read_Master_Log_Pos: 498

  Relay_Log_File: relay-bin.000002

Relay_Log_Pos: 783

Relay_Master_Log_File: master-bin.000003

Slave_IO_Running: Yes

Slave_SQL_Running: Yes


#node2（master节点）

MariaDB [(none)]> GRANT ALL ON *.* TO ‘mhauser‘@‘192.168.1.%‘ IDENTIFIED BY ‘mhapass‘;Query OK, 0 rows affected (0.00 sec)


MariaDB [(none)]> FLUSH PRIVILEGES;

Query OK, 0 rows affected (0.00 sec)


#在node1节点上配置4台主机能互相通信

[[email protected] ~]# ssh-keygen -t rsa -P ‘‘

[[email protected] ~]# cat .ssh/id_rsa.pub > .ssh/authorized_keys

[[email protected] ~]#scp -p .ssh/id_rsa .ssh/authorized_keys node2:/root/.ssh

[[email protected] ~]#scp -p .ssh/id_rsa .ssh/authorized_keys node3:/root/.ssh

[[email protected] ~]#scp -p .ssh/id_rsa .ssh/authorized_keys node4:/root/.ssh

[[email protected] ~]# ls *rpm

mha4mysql-manager-0.56-0.el6.noarch.rpm

mha4mysql-node-0.56-0.el6.noarch.rpm

[[email protected] ~]# rpm -ivh epel-release-latest-7.noarch.rpm 

[[email protected] ~]# yum install mha4mysql-* -y

[[email protected] ~]# scp mha4mysql-node-0.56-0.el6.noarch.rpm node2:/root

[[email protected] ~]# scp mha4mysql-node-0.56-0.el6.noarch.rpm node3:/root

[[email protected] ~]# scp mha4mysql-node-0.56-0.el6.noarch.rpm node4:/root

[[email protected] ~]# yum -y install mha4mysql-node-0.56-0.el6.noarch.rpm 

[[email protected] ~]# yum -y install mha4mysql-node-0.56-0.el6.noarch.rpm 

[[email protected] ~]# yum -y install mha4mysql-node-0.56-0.el6.noarch.rpm 


[[email protected] ~]# mkdir /etc/masterha

[root[email protected] ~]# vim /etc/masterha/app1.cnf

添加

[server default]

user=mhauser

password=mhapass

manager_workdir=/data/masterha/app1

manager_log=/data/masterha/app1/manager.log

remote_workdir=/data/masterha/app1

ssh_user=root

repl_user=repluser

repl_password=replpass

ping_interval=1


[server1]

hostname=192.168.1.131


[server2]

hostname=192.168.1.132

candidate_master=1


[server3]

hostname=192.168.1.133


#检查ssh环境

[[email protected] ~]# masterha_check_ssh --conf=/etc/masterha/app1.cnf


#检查主从复制环境

[[email protected] ~]# masterha_check_repl --conf=/etc/masterha/app1.cnf


#启动MHA

[[email protected] ~]# masterha_manager --conf=/etc/masterha/app1.cnf


#测试：关掉master mysql 

[[email protected] ~]# killall mysqld mysqld_safe


测试结果：

#master已变为node3（192.168.1.132）

[[email protected] ~]# mysql

MariaDB [(none)]> SHOW SLAVE STATUS \G

*************************** 1. row ***************************

  Slave_IO_State: Waiting for master to send event

 Master_Host: 192.168.1.132

 Master_User: repluser

 Master_Port: 3306

Connect_Retry: 60

 Master_Log_File: master-bin.000003

 Read_Master_Log_Pos: 245

  Relay_Log_File: relay-bin.000002

Relay_Log_Pos: 530

Relay_Master_Log_File: master-bin.000003

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

MariaDB [(none)]> SHOW GLOBAL VARIABLES LIKE ‘read_only‘;

+---------------+-------+

| Variable_name | Value |

+---------------+-------+

| read_only     | ON    |

+---------------+-------+

#node3自动变为master，read_only状态被关闭

[[email protected] ~]# mysql

MariaDB [(none)]> SHOW MASTER STATUS;

+-------------------+----------+--------------+------------------+

| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |

+-------------------+----------+--------------+------------------+

| master-bin.000003 |      245 |              |                  |

+-------------------+----------+--------------+------------------+

MariaDB [(none)]> SHOW GLOBAL VARIABLES LIKE ‘read_only‘;

+---------------+-------+

| Variable_name | Value |

+---------------+-------+

| read_only     | OFF   |

+---------------+-------+

[[email protected] ~]# vim /etc/my.cnf

添加

read_only = 1

relay_log_purge = 0

[[email protected] ~]# rm -rf /var/lib/mysql/*

[[email protected] ~]# systemctl start mariadb.service

[[email protected] ~]# mysql

MariaDB [(none)]> CHANGE MASTER TO MASTER_HOST=‘192.168.1.132‘,MASTER_USER=‘repluser‘,MASTER_PASSWORD=‘replpass‘;

MariaDB [(none)]> START SLAVE;

Query OK, 0 rows affected (0.01 sec)


MariaDB [(none)]> SHOW SLAVE STATUS \G

*************************** 1. row ***************************

  Slave_IO_State: Waiting for master to send event

 Master_Host: 192.168.1.132

 Master_User: repluser

 Master_Port: 3306

Connect_Retry: 60

 Master_Log_File: master-bin.000003

 Read_Master_Log_Pos: 245

  Relay_Log_File: relay-bin.000002

Relay_Log_Pos: 25940

Relay_Master_Log_File: master-bin.000001

Slave_IO_Running: Yes

Slave_SQL_Running: No

 Replicate_Do_DB: 

 Replicate_Ignore_DB: 

  Replicate_Do_Table: 

  Replicate_Ignore_Table: 

 Replicate_Wild_Do_Table: 

 Replicate_Wild_Ignore_Table: 

  Last_Errno: 1062

  Last_Error: Error ‘Duplicate entry ‘%-test-‘ for key ‘PRIMARY‘‘ on query. Default database: ‘mysql‘. Query: ‘INSERT INTO db SELECT * FROM tmp_db WHERE @had_db_table=0‘

MariaDB [(none)]> \q

[[email protected] ~]# systemctl stop mariadb.service 

[[email protected] ~]# rm -rf /var/lib/mysql/*

[[email protected] ~]# systemctl start mariadb.service

[[email protected] ~]# mysql

MariaDB [(none)]> GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO ‘repluser‘@‘192.168.1.%‘ IDENTIFIED BY ‘replpass‘;

MariaDB [(none)]> CHANGE MASTER TO MASTER_HOST=‘192.168.1.132‘,MASTER_USER=‘repluser‘,MASTER_PASSWORD=‘replpass‘;

MariaDB [(none)]> GRANT ALL ON *.* TO ‘mhauser‘@‘192.168.1.%‘ IDENTIFIED BY ‘mhapass‘;

MariaDB [(none)]> CHANGE MASTER TO MASTER_HOST=‘192.168.1.132‘,MASTER_USER=‘repluser‘,MASTER_PASSWORD=‘replpass‘,MASTER_LOG_FILE=‘master-bin.000003‘,MASTER_LOG_POS=245;

MariaDB [(none)]> START SLAVE; 

MariaDB [(none)]> SHOW SLAVE STATUS \G

*************************** 1. row ***************************

  Slave_IO_State: Waiting for master to send event

 Master_Host: 192.168.1.132

 Master_User: repluser

 Master_Port: 3306

Connect_Retry: 60

 Master_Log_File: master-bin.000003

 Read_Master_Log_Pos: 245

  Relay_Log_File: relay-bin.000002

Relay_Log_Pos: 530

Relay_Master_Log_File: master-bin.000003

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

[[email protected] ~]#  masterha_check_status --conf=/etc/masterha/app1.cnf

app1 (pid:37651) is running(0:PING_OK), master:192.168.1.132


02 MySQL复制及Galera Cluster


实战：配置Galera Cluster

配置环境：

node1: MHA 192.168.1.130 CentOS7.2

node2：Master 192.168.1.131 CentOS7.2

node3：Slave  192.168.1.132 CentOS7.2

node4：Slave  192.168.1.133 CentOS7.2


环境准备

[[email protected] ~]# vim /etc/hosts

添加

192.168.1.131       node1

192.168.1.132       node2

192.168.1.133       node3

[[email protected] ~]# scp /etc/hosts node2:/etc

[[email protected] ~]# scp /etc/hosts node3:/etc


#在node1节点上配置3台主机能互相通信

[[email protected] ~]# ssh-keygen -t rsa -P ‘‘

[[email protected] ~]# cat .ssh/id_rsa.pub > .ssh/authorized_keys

[[email protected] ~]#scp -p .ssh/id_rsa .ssh/authorized_keys node2:/root/.ssh

[[email protected] ~]#scp -p .ssh/id_rsa .ssh/authorized_keys node3:/root/.ssh


[[email protected] ~]# cd /etc/yum.repos.d/

[[email protected] yum.repos.d]# vim galera.repo

添加

[galera]

name=Galera Cluster from MariaDB

baseurl=ftp://192.168.1.131/pub/galera_cluster/

gpgcheck=0

[[email protected] ~]# rpm -ivh /mnt/Packages/vsftpd-3.0.2-10.el7.x86_64.rpm

[[email protected] ~]# systemctl start vsftpd.service

[[email protected] ~]# cp -r galer_cluster /var/ftp/pub/

[[email protected] yum.repos.d]# yum repolist

[[email protected] ~]# yum -y install MariaDB-Cluster

[[email protected] ~]# yum list all | grep -i "mariadb"

[[email protected] ~]# yum -y install MariaDB-Galera-server

[[email protected] ~]# scp /etc/yum.repos.d/galera.repo node2:/etc/yum.repos.d/galera.repo

[[email protected] ~]# scp /etc/yum.repos.d/galera.repo node3:/etc/yum.repos.d/galera.repo

[[email protected] ~]# yum -y install MariaDB-Galera-server

[[email protected] ~]# yum -y install MariaDB-Galera-server


[[email protected] ~]# vim /etc/my.cnf.d/server.cnf 

修改[galera]的内容为：

[galera]

# Mandatory settings

wsrep_provider=/usr/lib64/galera/libgalera_smm.so

wsrep_cluster_address="gcomm://192.168.1.131,192.168.1.132,192.168.1.133"

binlog_format=row

default_storage_engine=InnoDB

innodb_autoinc_lock_mode=2

bind-address=0.0.0.0

wsrep_cluster_name=‘mycluster‘

[[email protected] ~]# scp /etc/my.cnf.d/server.cnf node2:/etc/my.cnf.d/

[[email protected] ~]# scp /etc/my.cnf.d/server.cnf node3:/etc/my.cnf.d/

#启动

[[email protected] ~]# /etc/rc.d/init.d/mysql start --wsrep-new-cluster

[[email protected] ~]# service mysql start

[[email protected] ~]# service mysql start


[[email protected] ~]# mysql

MariaDB [(none)]> CREATE DATABASE mydb;

MariaDB [(none)]> SHOW DATABASES;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mydb               |

| mysql              |

| performance_schema |

| test               |

+--------------------+


[[email protected] ~]# mysql

MariaDB [(none)]> SHOW DATABASES;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mydb               |

| mysql              |

| performance_schema |

| test               |

+--------------------+

MariaDB [(none)]> use mydb;

Database changed

MariaDB [mydb]> CREATE TABLE tb1(id int,name char(10));


[[email protected] ~]# mysql

MariaDB [(none)]> SHOW DATABASES;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mydb               |

| mysql              |

| performance_schema |

| test               |

+--------------------+

MariaDB [(none)]> use mydb;

MariaDB [mydb]> SHOW TABLES;

+----------------+

| Tables_in_mydb |

+----------------+

| tb1            |

+----------------+

MariaDB [mydb]> DESC tb1;

+-------+----------+------+-----+---------+-------+

| Field | Type     | Null | Key | Default | Extra |

+-------+----------+------+-----+---------+-------+

| id    | int(11)  | YES  |     | NULL    |       |

| name  | char(10) | YES  |     | NULL    |       |

+-------+----------+------+-----+---------+-------+

MariaDB [mydb]> CREATE TABLE tb2(id int UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,name CHAR(30));

MariaDB [mydb]> INSERT INTO tb2 (name) VALUES (‘hi‘),(‘hello‘);


node2节点：

MariaDB [mydb]> SELECT * FROM tb2;

+----+-------+

| id | name  |

+----+-------+

|  2 | hi    |

|  5 | hello |

+----+-------+

MariaDB [mydb]> INSERT INTO tb2 (name) VALUES (‘to‘),(‘from‘);

MariaDB [mydb]> SELECT * FROM tb2;                            

+----+-------+

| id | name  |

+----+-------+

|  2 | hi    |

|  5 | hello |

|  7 | to    |

| 10 | from  |

+----+-------+




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