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Mysql部署MHA高可用

news 2026/2/8 14:17:18

部署前准备：

　　mysql-8.0.27下载地址：https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.27-1.el7.x86_64.rpm-bundle.tar

　　mha-manager下载地址：https://github.com/yoshinorim/mha4mysql-manager/releases/download/v0.58/mha4mysql-manager-0.58-0.el7.centos.noarch.rpm

　　mha-node下载地址：https://github.com/yoshinorim/mha4mysql-node/releases/download/v0.58/mha4mysql-node-0.58-0.el7.centos.noarch.rpm

部署架构：

基本配置

4个节点逐台配置hostname和/etc/hosts文件

安装mysql8

4个节点均创建/data目录，将mysql-8.0.27-1.el7.x86_64.rpm-bundle.tar上传到/data目录下，进行解压安装

我这里使用操作系统镜像制作了本地yum源，用来解决依赖问题，命令见下图

看到如下内容，代表安装完成

 配置Mysql异步复制集群

启动hdp2、hdp3、hdp4上的mysql服务，并配置开机自启

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systemctl enable mysqld --now

 连接3个节点的mysql数据库，数据库默认root密码通过查看日志获取

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cat /var/log/mysqld.log |grep password

...... [Server] A temporary password is generated for root@localhost: euBcRQk+3tpa

3个节点数据库修改root用户密码，命令及sql如下

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[root@hdp2 data]# mysql -uroot -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 20

Server version: 8.0.27

Copyright (c) 2000, 2021, Oracle and/or its affiliates.

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> alter user 'root'@'localhost' identified by '1qaz@WSX123';

Query OK, 0 rows affected (0.01 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.01 sec)

mysql> exit;

Bye

3个节点配置数据库server_id，以root用户登录mysql进行临时配置，然后将server_id配置在/etc/my.cnf中，防止重启后失效

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hdp2

mysql> set global server_id=1;

hdp3

mysql> set global server_id=2;

hdp4

mysql> set global server_id=3;

hdp2

]# echo "server_id=1" >> /etc/my.cnf

hdp3

]# echo "server_id=2" >> /etc/my.cnf

hdp4

]# echo "server_id=3" >> /etc/my.cnf

查看主库hdp2的二进制日志信息

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[root@hdp2 data]# mysql -uroot -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 23

Server version: 8.0.27 MySQL Community Server - GPL

Copyright (c) 2000, 2021, Oracle and/or its affiliates.

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> show master status;

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

| File          | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| binlog.000003 |      642 |              |                  |                   |

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

1 row in set (0.00 sec)

mysql>　　

在主库hdp2上建立复制专用用户，并授权

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mysql> create user 'repl'@'%' identified with mysql_native_password by '1qaz@WSX123';

Query OK, 0 rows affected (0.01 sec)

mysql> grant replication client,replication slave on *.* to 'repl'@'%';

Query OK, 0 rows affected (0.01 sec)

mysql>　

在从库hdp3和hdp4上创建主库信息

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mysql> change master to

    -> master_host='192.168.244.151',

    ->  master_port=3306,

    -> master_user='repl',

    -> master_password='1qaz@WSX123',

    -> master_log_file='binlog.000003',               #主库状态显示的File

    -> master_log_pos=642;                            #主库状态显示的Position

Query OK, 0 rows affected, 9 warnings (0.02 sec)

mysql>   

在从库启动复制并查看从库状态

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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: 192.168.244.151

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: binlog.000003

          Read_Master_Log_Pos: 1165

               Relay_Log_File: hdp3-relay-bin.000002

                Relay_Log_Pos: 844

        Relay_Master_Log_File: binlog.000003

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

              Replicate_Do_DB:

          Replicate_Ignore_DB:

           Replicate_Do_Table:

       Replicate_Ignore_Table:

      Replicate_Wild_Do_Table:

  Replicate_Wild_Ignore_Table:

                   Last_Errno: 0

                   Last_Error:

                 Skip_Counter: 0

          Exec_Master_Log_Pos: 1165

              Relay_Log_Space: 1052

              Until_Condition: None

               Until_Log_File:

                Until_Log_Pos: 0

           Master_SSL_Allowed: No

           Master_SSL_CA_File:

           Master_SSL_CA_Path:

              Master_SSL_Cert:

            Master_SSL_Cipher:

               Master_SSL_Key:

        Seconds_Behind_Master: 0

Master_SSL_Verify_Server_Cert: No

                Last_IO_Errno: 0

                Last_IO_Error:

               Last_SQL_Errno: 0

               Last_SQL_Error:

  Replicate_Ignore_Server_Ids:

             Master_Server_Id: 1

                  Master_UUID: 7096d4eb-7378-11ec-8ec4-000c29f7d066

             Master_Info_File: mysql.slave_master_info

                    SQL_Delay: 0

          SQL_Remaining_Delay: NULL

      Slave_SQL_Running_State: Replica has read all relay log; waiting for more updates

           Master_Retry_Count: 86400

                  Master_Bind:

      Last_IO_Error_Timestamp:

     Last_SQL_Error_Timestamp:

               Master_SSL_Crl:

           Master_SSL_Crlpath:

           Retrieved_Gtid_Set:

            Executed_Gtid_Set:

                Auto_Position: 0

         Replicate_Rewrite_DB:

                 Channel_Name:

           Master_TLS_Version:

       Master_public_key_path:

        Get_master_public_key: 0

            Network_Namespace:

1 row in set, 1 warning (0.00 sec)

mysql>

配置Mysql半同步复制

在主库加载插件semisync_master.so，从库加载插件semisync_slave.so

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hda2

mysql> install plugin rpl_semi_sync_master soname 'semisync_master.so';

Query OK, 0 rows affected, 1 warning (0.01 sec)

hda3

mysql> install plugin rpl_semi_sync_slave soname 'semisync_slave.so';

Query OK, 0 rows affected, 1 warning (0.01 sec)

hda4

mysql> install plugin rpl_semi_sync_slave soname 'semisync_slave.so';

Query OK, 0 rows affected, 1 warning (0.01 sec)

启用半同步复制

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hdp2

mysql> set global rpl_semi_sync_master_enabled=1;

Query OK, 0 rows affected (0.00 sec)

hdp3

mysql> set global rpl_semi_sync_slave_enabled=1;

Query OK, 0 rows affected (0.00 sec)

hdp4

mysql> set global rpl_semi_sync_slave_enabled=1;

Query OK, 0 rows affected (0.00 sec)

将半同步插件配置持久化到配置文件中

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hda2

]# echo -e "plugin-load=\"rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so\"\nrpl-semi-sync-master-enabled=1\nrpl-semi-sync-slave-enabled=1" >> /etc/my.cnf

hda3

]# echo -e "plugin-load=\"rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so\"\nrpl-semi-sync-master-enabled=1\nrpl-semi-sync-slave-enabled=1" >> /etc/my.cnf

hda4

]# echo -e "plugin-load=\"rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so\"\nrpl-semi-sync-master-enabled=1\nrpl-semi-sync-slave-enabled=1" >> /etc/my.cnf

重启从库上的IO线程，否则仍然为异步复制模式，查询状态及重启命令如下

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hdp3

mysql> show status like 'Rpl_semi_sync_slave_status';

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

| Variable_name              | Value |

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

| Rpl_semi_sync_slave_status | OFF   |

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

1 row in set (0.01 sec)

mysql> stop slave io_thread;

Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> start slave io_thread;

Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> show status like 'Rpl_semi_sync_slave_status';

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

| Variable_name              | Value |

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

| Rpl_semi_sync_slave_status | ON    |

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

1 row in set (0.00 sec)

mysql>

hdp4

mysql> show status like 'Rpl_semi_sync_slave_status';

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

| Variable_name              | Value |

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

| Rpl_semi_sync_slave_status | OFF   |

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

1 row in set (0.01 sec)

mysql> stop slave io_thread;

Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> start slave io_thread;

Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> show status like 'Rpl_semi_sync_slave_status';

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

| Variable_name              | Value |

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

| Rpl_semi_sync_slave_status | ON    |

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

1 row in set (0.00 sec)

mysql>

查询主库的半同步复制是否在运行

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hdp2

mysql> show status like 'Rpl_semi_sync_master_status';

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

| Variable_name               | Value |

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

| Rpl_semi_sync_master_status | ON    |

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

1 row in set (0.00 sec)

mysql>

部署MHA相关组件

环境说明

组件：

　　mha-manager：部署在hdp1

　　mha-node：部署在hdp2、hdp3、hdp4

4个节点安装perl相关依赖

下载epel源

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wget -O /etc/yum.repos.d/epel-7.repo http://mirrors.aliyun.com/repo/epel-7.repo

安装perl-DBD-MySQL、perl-Log-DIspatch、perl-Parallel-ForkManager、perl-Time-HiRes

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yum -y install perl-DBD-MySQL perl-Log-DIspatch perl-Parallel-ForkManager perl-Time-HiRes

安装perl-Config-Tiny，下载地址：http://mirror.centos.org/altarch/7/os/aarch64/Packages/perl-Config-Tiny-2.14-7.el7.noarch.rpm

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]# yum -y install http://mirror.centos.org/altarch/7/os/aarch64/Packages/perl-Config-Tiny-2.14-7.el7.noarch.rpm

Loaded plugins: fastestmirror

perl-Config-Tiny-2.14-7.el7.noarch.rpm                                                                     |  25 kB  00:00:00    

Examining /var/tmp/yum-root-Zu9UoE/perl-Config-Tiny-2.14-7.el7.noarch.rpm: perl-Config-Tiny-2.14-7.el7.noarch

Marking /var/tmp/yum-root-Zu9UoE/perl-Config-Tiny-2.14-7.el7.noarch.rpm to be installed

Resolving Dependencies

--> Running transaction check

---> Package perl-Config-Tiny.noarch 0:2.14-7.el7 will be installed

--> Finished Dependency Resolution

Dependencies Resolved

==================================================================================================================================

 Package                       Arch                Version                 Repository                                        Size

==================================================================================================================================

Installing:

 perl-Config-Tiny              noarch              2.14-7.el7              /perl-Config-Tiny-2.14-7.el7.noarch               39 k

Transaction Summary

==================================================================================================================================

Install  1 Package

Total size: 39 k

Installed size: 39 k

Downloading packages:

Running transaction check

Running transaction test

Transaction test succeeded

Running transaction

  Installing : perl-Config-Tiny-2.14-7.el7.noarch                                                                             1/1

  Verifying  : perl-Config-Tiny-2.14-7.el7.noarch                                                                             1/1

Installed:

  perl-Config-Tiny.noarch 0:2.14-7.el7                                                                                           

Complete!　

4个节点互相配置免密登录

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]# ssh-keygen

Generating public/private rsa key pair.

Enter file in which to save the key (/root/.ssh/id_rsa):

Created directory '/root/.ssh'.

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /root/.ssh/id_rsa.

Your public key has been saved in /root/.ssh/id_rsa.pub.

The key fingerprint is:

SHA256:xOMA98v0Perm0KZ3zwv4TlGqKzzYk3LldUzQaK8f+6M root@hdp1

The key's randomart image is:

+---[RSA 2048]----+

|    . .      o   |

|     o o    + .  |

|      . *  . o.  |

|       * + . oo  |

|        S . =+   |

|         ..+oo+  |

|       +.+*.oo o |

|      o O=++.oo. |

|       o.B+ooE=oo|

+----[SHA256]-----+

]# ssh-copy-id hdp1

/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"

The authenticity of host 'hdp1 (192.168.244.150)' can't be established.

ECDSA key fingerprint is SHA256:tPUBu2Mcd9mClNUjaV9EYZNa9g45k2Ksx5xJktP7voo.

ECDSA key fingerprint is MD5:b2:6c:2e:64:d6:76:fc:2d:1d:7d:e3:32:29:6b:1c:ff.

Are you sure you want to continue connecting (yes/no)? yes

/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed

/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys

root@hdp1's password:

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'hdp1'"

and check to make sure that only the key(s) you wanted were added.

]# ssh-copy-id hdp2

/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"

The authenticity of host 'hdp2 (192.168.244.151)' can't be established.

ECDSA key fingerprint is SHA256:tPUBu2Mcd9mClNUjaV9EYZNa9g45k2Ksx5xJktP7voo.

ECDSA key fingerprint is MD5:b2:6c:2e:64:d6:76:fc:2d:1d:7d:e3:32:29:6b:1c:ff.

Are you sure you want to continue connecting (yes/no)? yes

/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed

/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys

root@hdp2's password:

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'hdp2'"

and check to make sure that only the key(s) you wanted were added.

]# ssh-copy-id hdp3

/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"

The authenticity of host 'hdp3 (192.168.244.152)' can't be established.

ECDSA key fingerprint is SHA256:tPUBu2Mcd9mClNUjaV9EYZNa9g45k2Ksx5xJktP7voo.

ECDSA key fingerprint is MD5:b2:6c:2e:64:d6:76:fc:2d:1d:7d:e3:32:29:6b:1c:ff.

Are you sure you want to continue connecting (yes/no)? yes

/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed

/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys

root@hdp3's password:

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'hdp3'"

and check to make sure that only the key(s) you wanted were added.

]# ssh-copy-id hdp4

/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"

The authenticity of host 'hdp4 (192.168.244.153)' can't be established.

ECDSA key fingerprint is SHA256:tPUBu2Mcd9mClNUjaV9EYZNa9g45k2Ksx5xJktP7voo.

ECDSA key fingerprint is MD5:b2:6c:2e:64:d6:76:fc:2d:1d:7d:e3:32:29:6b:1c:ff.

Are you sure you want to continue connecting (yes/no)? yes

/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed

/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys

root@hdp4's password:

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'hdp4'"

and check to make sure that only the key(s) you wanted were added.　

hdp2、hdp3、hdp4安装mha-node

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]# rpm -ivh mha4mysql-node-0.58-0.el7.centos.noarch.rpm

Preparing...                          ################################# [100%]

Updating / installing...

   1:mha4mysql-node-0.58-0.el7.centos ################################# [100%]

hdp1安装mha-manager和mha-node

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]# yum -y install mha4mysql-manager-0.58-0.el7.centos.noarch.rpm mha4mysql-node-0.58-0.el7.centos.noarch.rpm

Loaded plugins: fastestmirror

Examining mha4mysql-manager-0.58-0.el7.centos.noarch.rpm: mha4mysql-manager-0.58-0.el7.centos.noarch

Marking mha4mysql-manager-0.58-0.el7.centos.noarch.rpm to be installed

Examining mha4mysql-node-0.58-0.el7.centos.noarch.rpm: mha4mysql-node-0.58-0.el7.centos.noarch

Marking mha4mysql-node-0.58-0.el7.centos.noarch.rpm to be installed

Resolving Dependencies

--> Running transaction check

---> Package mha4mysql-manager.noarch 0:0.58-0.el7.centos will be installed

---> Package mha4mysql-node.noarch 0:0.58-0.el7.centos will be installed

--> Finished Dependency Resolution

Dependencies Resolved

==================================================================================================================================

 Package                    Arch            Version                    Repository                                            Size

==================================================================================================================================

Installing:

 mha4mysql-manager          noarch          0.58-0.el7.centos          /mha4mysql-manager-0.58-0.el7.centos.noarch          328 k

 mha4mysql-node             noarch          0.58-0.el7.centos          /mha4mysql-node-0.58-0.el7.centos.noarch             106 k

Transaction Summary

==================================================================================================================================

Install  2 Packages

Total size: 434 k

Installed size: 434 k

Downloading packages:

Running transaction check

Running transaction test

Transaction test succeeded

Running transaction

Warning: RPMDB altered outside of yum.

  Installing : mha4mysql-node-0.58-0.el7.centos.noarch                                                                        1/2

  Installing : mha4mysql-manager-0.58-0.el7.centos.noarch                                                                     2/2

  Verifying  : mha4mysql-manager-0.58-0.el7.centos.noarch                                                                     1/2

  Verifying  : mha4mysql-node-0.58-0.el7.centos.noarch                                                                        2/2

Installed:

  mha4mysql-manager.noarch 0:0.58-0.el7.centos                      mha4mysql-node.noarch 0:0.58-0.el7.centos                    

Complete!

配置MHA

在hdp1上创建配置文件目录并创建配置app1.cnf

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]# mkdir -p /etc/masterha

]# vim /etc/masterha/app1.cnf

[server default]

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

manager_workdir=/var/log/masterha/app1.log

master_binlog_dir=/var/lib/mysql

master_ip_failover_script=/usr/bin/master_ip_failover

master_ip_online_change_script=/usr/bin/master_ip_online_change

password=1qaz@WSX123

ping_interval=1

remote_workdir=/tmp

repl_password=1qaz@WSX123

repl_user=repl

secondary_check_script=/usr/bin/masterha_secondary_check -s hdp2 -s hdp3 -s hdp4 --user=root --master_host=hdp2 --master_ip=192.168.244.151 --master_port=3306

shutdown_script=""

ssh_user=root

user=root

[server1]

hostname=192.168.244.151

ssh_port=22

candidate_master=1

[server2]

candidate_master=1

check_repl_delay=0

hostname=192.168.244.152

port=3306

[server3]

hostname=192.168.244.153

port=3306

在hdp3、hdp4设置从库relay_log_purge参数

MHA在发生主从切换的过程中，从库的恢复过程依赖于relay log，所以这里要将relay log的自动清除设置为OFF，即采用手动清除relay log的方式。

在默认情况下，从服务器上的中继日志会在SQL线程执行完毕后被自动删除。

但是在MHA环境中，这些中继日志在恢复其他从服务器时可能会被用到，因此需要禁用中继日志的自动删除功能。

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]# mysql -uroot -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 21

Server version: 8.0.27 MySQL Community Server - GPL

Copyright (c) 2000, 2021, Oracle and/or its affiliates.

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> set global relay_log_purge=0;

Query OK, 0 rows affected (0.00 sec)

mysql>

在hdp1上创建自动故障转移脚本

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]# vim master_ip_failover

#!/usr/bin/env perl

#  Copyright (C) 2011 DeNA Co.,Ltd.

#  You should have received a copy of the GNU General Public License

#   along with this program; if not, write to the Free Software

#  Foundation, Inc.,

#  51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

## Note: This is a sample script and is not complete. Modify the script based on your environment.

use strict;

use warnings FATAL => 'all';

use Getopt::Long;

use MHA::DBHelper;

my (

  $command,        $ssh_user,         $orig_master_host,

  $orig_master_ip, $orig_master_port, $new_master_host,

  $new_master_ip,  $new_master_port,  $new_master_user,

  $new_master_password

);

my $vip = '192.168.244.154/24';

my $key = '88';

my $ssh_start_vip = "/sbin/ifconfig ens33:$key $vip";

my $ssh_stop_vip = "/sbin/ifconfig ens33:$key down";

GetOptions(

  'command=s'             => \$command,

  'ssh_user=s'            => \$ssh_user,

  'orig_master_host=s'    => \$orig_master_host,

  'orig_master_ip=s'      => \$orig_master_ip,

  'orig_master_port=i'    => \$orig_master_port,

  'new_master_host=s'     => \$new_master_host,

  'new_master_ip=s'       => \$new_master_ip,

  'new_master_port=i'     => \$new_master_port,

  'new_master_user=s'     => \$new_master_user,

  'new_master_password=s' => \$new_master_password,

);

exit &main();

sub main {

    print "\n\nIN SCRIPT TEST====$ssh_stop_vip==$ssh_start_vip===\n\n";

    if ( $command eq "stop" || $command eq "stopssh" ) {

        my $exit_code = 1;

        eval {

            print "Disabling the VIP on old master: $orig_master_host \n";

            &stop_vip();

            $exit_code = 0;

        };

        if ($@) {

            warn "Got Error: $@\n";

            exit $exit_code;

        }

        exit $exit_code;

    }

    elsif ( $command eq "start" ) {

        my $exit_code = 10;

        eval {

            print "Enabling the VIP - $vip on the new master - $new_master_host \n";

            &start_vip();

            $exit_code = 0;

        };

        if ($@) {

            warn $@;

            exit $exit_code;

        }

        exit $exit_code;

    }

    elsif ( $command eq "status" ) {

        print "Checking the Status of the script.. OK \n";

        exit 0;

    }

    else {

        &usage();

        exit 1;

    }

}

sub start_vip() {

    `ssh $ssh_user\@$new_master_host \" $ssh_start_vip \"`;

}

sub stop_vip() {

     return 0  unless  ($ssh_user);

    `ssh $ssh_user\@$orig_master_host \" $ssh_stop_vip \"`;

}

sub usage {

  print

"Usage: master_ip_failover --command=start|stop|stopssh|status --orig_master_host=host --orig_master_ip=ip --orig_master_port=port --new_master_host=host --new_master_ip=ip --new_master_port=port\n";

}

给自动故障转移脚本授权

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]# chmod 777  /usr/bin/master_ip_failover

hdp1上检查MHA

1、检查SSH

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]# masterha_check_ssh --conf=/etc/masterha/app1.cnf

Wed Jan 12 05:27:26 2022 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.

Wed Jan 12 05:27:26 2022 - [info] Reading application default configuration from /etc/masterha/app1.cnf..

Wed Jan 12 05:27:26 2022 - [info] Reading server configuration from /etc/masterha/app1.cnf..

Wed Jan 12 05:27:26 2022 - [info] Starting SSH connection tests..

Wed Jan 12 05:27:27 2022 - [debug]

Wed Jan 12 05:27:26 2022 - [debug]  Connecting via SSH from root@192.168.244.152(192.168.244.152:22) to root@192.168.244.153(192.168.244.153:22)..

Wed Jan 12 05:27:27 2022 - [debug]   ok.

Wed Jan 12 05:27:28 2022 - [debug]

Wed Jan 12 05:27:27 2022 - [debug]  Connecting via SSH from root@192.168.244.153(192.168.244.153:22) to root@192.168.244.152(192.168.244.152:22)..

Wed Jan 12 05:27:27 2022 - [debug]   ok.

Wed Jan 12 05:27:28 2022 - [info] All SSH connection tests passed successfully.

2、 检查整个复制环境状况

在hdp2执行root的登录授权，以及普通用户repl的登录授权

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mysql> update mysql.user set host='%'  where user='root';

Query OK, 1 row affected (0.03 sec)

Rows matched: 1  Changed: 1  Warnings: 0

mysql>  flush privileges;

Query OK, 0 rows affected (0.02 sec)

mysql> alter user 'repl'@'%' identified with mysql_native_password by '1qaz@WSX123';

Query OK, 0 rows affected (0.02 sec)

mysql> FLUSH PRIVILEGES;

Query OK, 0 rows affected (0.00 sec)

mysql> alter user 'root'@'%' identified with mysql_native_password by '1qaz@WSX123';

Query OK, 0 rows affected (0.01 sec)

mysql> FLUSH PRIVILEGES;

Query OK, 0 rows affected (0.01 sec)

进行复制环境检查

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]# masterha_check_repl --conf=/etc/masterha/app1.cnf

Wed Jan 12 05:49:57 2022 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.

Wed Jan 12 05:49:57 2022 - [info] Reading application default configuration from /etc/masterha/app1.cnf..

Wed Jan 12 05:49:57 2022 - [info] Reading server configuration from /etc/masterha/app1.cnf..

Wed Jan 12 05:49:57 2022 - [info] MHA::MasterMonitor version 0.58.

Wed Jan 12 05:49:58 2022 - [info] GTID failover mode = 0

Wed Jan 12 05:49:58 2022 - [info] Dead Servers:

Wed Jan 12 05:49:58 2022 - [info] Alive Servers:

Wed Jan 12 05:49:58 2022 - [info]   192.168.244.151(192.168.244.151:3306)

Wed Jan 12 05:49:58 2022 - [info]   192.168.244.152(192.168.244.152:3306)

Wed Jan 12 05:49:58 2022 - [info]   192.168.244.153(192.168.244.153:3306)

Wed Jan 12 05:49:58 2022 - [info] Alive Slaves:

Wed Jan 12 05:49:58 2022 - [info]   192.168.244.152(192.168.244.152:3306)  Version=8.0.27 (oldest major version between slaves) log-bin:enabled

Wed Jan 12 05:49:58 2022 - [info]     Replicating from 192.168.244.151(192.168.244.151:3306)

Wed Jan 12 05:49:58 2022 - [info]     Primary candidate for the new Master (candidate_master is set)

Wed Jan 12 05:49:58 2022 - [info]   192.168.244.153(192.168.244.153:3306)  Version=8.0.27 (oldest major version between slaves) log-bin:enabled

Wed Jan 12 05:49:58 2022 - [info]     Replicating from 192.168.244.151(192.168.244.151:3306)

Wed Jan 12 05:49:58 2022 - [info] Current Alive Master: 192.168.244.151(192.168.244.151:3306)

Wed Jan 12 05:49:58 2022 - [info] Checking slave configurations..

Wed Jan 12 05:49:58 2022 - [info]  read_only=1 is not set on slave 192.168.244.152(192.168.244.152:3306).

Wed Jan 12 05:49:58 2022 - [info]  read_only=1 is not set on slave 192.168.244.153(192.168.244.153:3306).

Wed Jan 12 05:49:58 2022 - [info] Checking replication filtering settings..

Wed Jan 12 05:49:58 2022 - [info]  binlog_do_db= , binlog_ignore_db=

Wed Jan 12 05:49:58 2022 - [info]  Replication filtering check ok.

Wed Jan 12 05:49:58 2022 - [info] GTID (with auto-pos) is not supported

Wed Jan 12 05:49:58 2022 - [info] Starting SSH connection tests..

Wed Jan 12 05:50:00 2022 - [info] All SSH connection tests passed successfully.

Wed Jan 12 05:50:00 2022 - [info] Checking MHA Node version..

Wed Jan 12 05:50:01 2022 - [info]  Version check ok.

Wed Jan 12 05:50:01 2022 - [info] Checking SSH publickey authentication settings on the current master..

Wed Jan 12 05:50:01 2022 - [info] HealthCheck: SSH to 192.168.244.151 is reachable.

Wed Jan 12 05:50:02 2022 - [info] Master MHA Node version is 0.58.

Wed Jan 12 05:50:02 2022 - [info] Checking recovery script configurations on 192.168.244.151(192.168.244.151:3306)..

Wed Jan 12 05:50:02 2022 - [info]   Executing command: save_binary_logs --command=test --start_pos=4 --binlog_dir=/var/lib/mysql --output_file=/tmp/save_binary_logs_test --manager_version=0.58 --start_file=binlog.000003

Wed Jan 12 05:50:02 2022 - [info]   Connecting to root@192.168.244.151(192.168.244.151:22)..

  Creating /tmp if not exists..    ok.

  Checking output directory is accessible or not..

   ok.

  Binlog found at /var/lib/mysql, up to binlog.000003

Wed Jan 12 05:50:02 2022 - [info] Binlog setting check done.

Wed Jan 12 05:50:02 2022 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers..

Wed Jan 12 05:50:02 2022 - [info]   Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=192.168.244.152 --slave_ip=192.168.244.152 --slave_port=3306 --workdir=/tmp --target_version=8.0.27 --manager_version=0.58 --relay_dir=/var/lib/mysql --current_relay_log=hdp3-relay-bin.000003  --slave_pass=xxx

Wed Jan 12 05:50:02 2022 - [info]   Connecting to root@192.168.244.152(192.168.244.152:22)..

  Checking slave recovery environment settings..

    Relay log found at /var/lib/mysql, up to hdp3-relay-bin.000003

    Temporary relay log file is /var/lib/mysql/hdp3-relay-bin.000003

    Checking if super_read_only is defined and turned on.. not present or turned off, ignoring.

    Testing mysql connection and privileges..

mysql: [Warning] Using a password on the command line interface can be insecure.

 done.

    Testing mysqlbinlog output.. done.

    Cleaning up test file(s).. done.

Wed Jan 12 05:50:02 2022 - [info]   Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=192.168.244.153 --slave_ip=192.168.244.153 --slave_port=3306 --workdir=/tmp --target_version=8.0.27 --manager_version=0.58 --relay_dir=/var/lib/mysql --current_relay_log=hdp4-relay-bin.000003  --slave_pass=xxx

Wed Jan 12 05:50:02 2022 - [info]   Connecting to root@192.168.244.153(192.168.244.153:22)..

  Checking slave recovery environment settings..

    Relay log found at /var/lib/mysql, up to hdp4-relay-bin.000003

    Temporary relay log file is /var/lib/mysql/hdp4-relay-bin.000003

    Checking if super_read_only is defined and turned on.. not present or turned off, ignoring.

    Testing mysql connection and privileges..

mysql: [Warning] Using a password on the command line interface can be insecure.

 done.

    Testing mysqlbinlog output.. done.

    Cleaning up test file(s).. done.

Wed Jan 12 05:50:03 2022 - [info] Slaves settings check done.

Wed Jan 12 05:50:03 2022 - [info]

192.168.244.151(192.168.244.151:3306) (current master)

 +--192.168.244.152(192.168.244.152:3306)

 +--192.168.244.153(192.168.244.153:3306)

Wed Jan 12 05:50:03 2022 - [info] Checking replication health on 192.168.244.152..

Wed Jan 12 05:50:03 2022 - [info]  ok.

Wed Jan 12 05:50:03 2022 - [info] Checking replication health on 192.168.244.153..

Wed Jan 12 05:50:03 2022 - [info]  ok.

Wed Jan 12 05:50:03 2022 - [info] Checking master_ip_failover_script status:

Wed Jan 12 05:50:03 2022 - [info]   /usr/bin/master_ip_failover --command=status --ssh_user=root --orig_master_host=192.168.244.151 --orig_master_ip=192.168.244.151 --orig_master_port=3306

IN SCRIPT TEST====/sbin/ifconfig ens33:88 down==/sbin/ifconfig ens33:88 192.168.244.144/24===

Checking the Status of the script.. OK

Wed Jan 12 05:50:03 2022 - [info]  OK.

Wed Jan 12 05:50:03 2022 - [warning] shutdown_script is not defined.

Wed Jan 12 05:50:03 2022 - [info] Got exit code 0 (Not master dead).

MySQL Replication Health is OK.

 3、检查MHA Manager的状态

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]# masterha_check_status --conf=/etc/masterha/app1.cnf

app1 is stopped(2:NOT_RUNNING).　

启动MHA Manager

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]# mkdir -p /var/log/masterha/app1

]# nohup  masterha_manager --conf=/etc/masterha/app1.cnf  --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/masterha/app1/manager.log 2>&1 &

[1] 15338

]# masterha_check_status --conf=/etc/masterha/app1.cnf

app1 (pid:15338) is running(0:PING_OK), master:192.168.244.151

4、查看启动日志：tailf /var/log/masterha/app1/manager.log

功能测试

在 hdp2上初始绑定VIP

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]# ifconfig ens33:1 192.168.244.154

]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

    link/ether 00:0c:29:f7:d0:66 brd ff:ff:ff:ff:ff:ff

    inet 192.168.244.151/24 brd 192.168.244.255 scope global noprefixroute ens33

       valid_lft forever preferred_lft forever

    inet 192.168.244.154/24 brd 192.168.244.255 scope global secondary ens33:1

       valid_lft forever preferred_lft forever

    inet6 fe80::20c:29ff:fef7:d066/64 scope link

       valid_lft forever preferred_lft forever

模拟主从延时，关闭hd3的slave IO线程

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mysql> stop slave io_thread;

Query OK, 0 rows affected, 1 warning (0.00 sec)　

在hdp2上生成数据，这里使用sysbench

hdp2安装sysbench

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在hdp2上生成数据

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mysql> create database sbtest;

Query OK, 1 row affected (0.01 sec)

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]# sysbench /usr/share/sysbench/tests/include/oltp_legacy/oltp.lua --mysql-host=127.0.0.1 --mysql-port=3306 --mysql-user=root --mysql-password=1qaz@WSX123 --oltp-test-mode=complex --oltp-tables-count=10 --oltp-table-size=10000 --threads=10 --time=120 --report-interval=10 --db-driver=mysql prepare

sysbench 1.0.17 (using system LuaJIT 2.0.4)

Creating table 'sbtest1'...

Inserting 10000 records into 'sbtest1'

Creating secondary indexes on 'sbtest1'...

Creating table 'sbtest2'...

Inserting 10000 records into 'sbtest2'

Creating secondary indexes on 'sbtest2'...

Creating table 'sbtest3'...

Inserting 10000 records into 'sbtest3'

Creating secondary indexes on 'sbtest3'...

Creating table 'sbtest4'...

Inserting 10000 records into 'sbtest4'

Creating secondary indexes on 'sbtest4'...

Creating table 'sbtest5'...

Inserting 10000 records into 'sbtest5'

Creating secondary indexes on 'sbtest5'...

Creating table 'sbtest6'...

Inserting 10000 records into 'sbtest6'

Creating secondary indexes on 'sbtest6'...

Creating table 'sbtest7'...

Inserting 10000 records into 'sbtest7'

Creating secondary indexes on 'sbtest7'...

Creating table 'sbtest8'...

Inserting 10000 records into 'sbtest8'

Creating secondary indexes on 'sbtest8'...

Creating table 'sbtest9'...

Inserting 10000 records into 'sbtest9'

Creating secondary indexes on 'sbtest9'...

Creating table 'sbtest10'...

Inserting 10000 records into 'sbtest10'

Creating secondary indexes on 'sbtest10'...

停止主服务器hdp2的MySQL服务

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验证VIP漂移

在hdp3上查看ip

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]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

    link/ether 00:0c:29:73:a4:20 brd ff:ff:ff:ff:ff:ff

    inet 192.168.244.152/24 brd 192.168.244.255 scope global noprefixroute ens33

       valid_lft forever preferred_lft forever

    inet 192.168.244.154/24 brd 192.168.244.255 scope global secondary ens33:88

       valid_lft forever preferred_lft forever

    inet6 fe80::20c:29ff:fe73:a420/64 scope link

       valid_lft forever preferred_lft forever

可以看到VIP已经从hdp2（master）漂移到了hdp3（slave1）

通过VIP连接数据库，查看表数据

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]# mysql -h192.168.244.154 -uroot -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 64

Server version: 8.0.27 MySQL Community Server - GPL

Copyright (c) 2000, 2021, Oracle and/or its affiliates.

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> use sbtest;

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql> show tables;

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

| Tables_in_sbtest |

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

| sbtest1          |

| sbtest10         |

| sbtest2          |

| sbtest3          |

| sbtest4          |

| sbtest5          |

| sbtest6          |

| sbtest7          |

| sbtest8          |

| sbtest9          |

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

10 rows in set (0.00 sec)

mysql> select count(*) from sbtest5;

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

| count(*) |

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

|    10000 |

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

1 row in set (0.01 sec)

至此，MHA基本搭建完毕！！

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