1、编写脚本，持让用户自主选择，使用mysqldump还是xtraback全量备份
备注：前提是安装好mariadb-server以及xtraback（epel源）
#!/bin/bash
PATH=/data
FILE_NAME=all.sql
read -p "Do you want to back up [y/n]? " answer
case $answer in
y)
echo "Please select the way to backup:"
echo "1)mysqldump"
echo "2)xtrabackup"
read -p "input the number " method
if [[ $method = 1 ]];then
/usr/bin/mysqldump -A --master-data=2 > $PATH/$FILE_NAME
echo "Back-up success!"
elif [[ $method = 2 ]];then
/usr/bin/xtrabackup --backup --target-dir=$PATH/xtra
else
echo "please select correct number !"
exit 0
fi
;;
n)
exit 10
;;
*)
echo "please input correct answer !"
;;
esac
exit
(1)选择mysqldump备份
[root@centos01 ~]#bash mysql_back_up.sh
Do you want to back up [y/n]? y
Please select the way to backup:
1)mysqldump
2)xtrabackup
input the number 1
Back-up success!
[root@centos01 ~]#ll /data/all.sql
-rw-r--r-- 1 root root 515055 Jun 16 14:50 /data/all.sql
(2)选择xtraback备份
[root@centos01 ~]#bash mysql_back_up.sh
Do you want to back up [y/n]? y
Please select the way to backup:
1)mysqldump
2)xtrabackup
input the number 2
sh: perl: command not found
200616 14:51:40 Connecting to MySQL server host: localhost, user: (null), password: not set, port: 0, socket: /data/mysql/mysql.sock
Using server version 5.5.65-MariaDB
/usr/bin/xtrabackup version 2.3.6 based on MySQL server 5.6.24 Linux (x86_64) (revision id: )
xtrabackup: uses posix_fadvise().
xtrabackup: cd to /data/mysql
xtrabackup: open files limit requested 0, set to 1024
xtrabackup: using the following InnoDB configuration:
xtrabackup: innodb_data_home_dir = ./
xtrabackup: innodb_data_file_path = ibdata1:10M:autoextend
xtrabackup: innodb_log_group_home_dir = ./
xtrabackup: innodb_log_files_in_group = 2
xtrabackup: innodb_log_file_size = 5242880
200616 14:51:40 >> log scanned up to (1597945)
xtrabackup: Generating a list of tablespaces
200616 14:51:40 [01] Copying ./ibdata1 to /data/xtra/ibdata1
200616 14:51:41 [01] ...done
200616 14:51:41 >> log scanned up to (1597945)
200616 14:51:41 Executing FLUSH NO_WRITE_TO_BINLOG TABLES...
200616 14:51:41 Executing FLUSH TABLES WITH READ LOCK...
200616 14:51:41 Starting to backup non-InnoDB tables and files
200616 14:51:41 [01] Copying ./mysql/db.frm to /data/xtra/mysql/db.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/db.MYI to /data/xtra/mysql/db.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/db.MYD to /data/xtra/mysql/db.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/host.frm to /data/xtra/mysql/host.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/host.MYI to /data/xtra/mysql/host.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/host.MYD to /data/xtra/mysql/host.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/user.frm to /data/xtra/mysql/user.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/user.MYI to /data/xtra/mysql/user.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/user.MYD to /data/xtra/mysql/user.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/func.frm to /data/xtra/mysql/func.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/func.MYI to /data/xtra/mysql/func.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/func.MYD to /data/xtra/mysql/func.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/plugin.frm to /data/xtra/mysql/plugin.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/plugin.MYI to /data/xtra/mysql/plugin.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/plugin.MYD to /data/xtra/mysql/plugin.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/servers.frm to /data/xtra/mysql/servers.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/servers.MYI to /data/xtra/mysql/servers.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/servers.MYD to /data/xtra/mysql/servers.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/tables_priv.frm to /data/xtra/mysql/tables_priv.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/tables_priv.MYI to /data/xtra/mysql/tables_priv.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/tables_priv.MYD to /data/xtra/mysql/tables_priv.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/columns_priv.frm to /data/xtra/mysql/columns_priv.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/columns_priv.MYI to /data/xtra/mysql/columns_priv.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/columns_priv.MYD to /data/xtra/mysql/columns_priv.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_topic.frm to /data/xtra/mysql/help_topic.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_topic.MYI to /data/xtra/mysql/help_topic.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_topic.MYD to /data/xtra/mysql/help_topic.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_category.frm to /data/xtra/mysql/help_category.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_category.MYI to /data/xtra/mysql/help_category.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_category.MYD to /data/xtra/mysql/help_category.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_relation.frm to /data/xtra/mysql/help_relation.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_relation.MYI to /data/xtra/mysql/help_relation.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_relation.MYD to /data/xtra/mysql/help_relation.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_keyword.frm to /data/xtra/mysql/help_keyword.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_keyword.MYI to /data/xtra/mysql/help_keyword.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/help_keyword.MYD to /data/xtra/mysql/help_keyword.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_name.frm to /data/xtra/mysql/time_zone_name.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_name.MYI to /data/xtra/mysql/time_zone_name.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_name.MYD to /data/xtra/mysql/time_zone_name.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone.frm to /data/xtra/mysql/time_zone.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone.MYI to /data/xtra/mysql/time_zone.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone.MYD to /data/xtra/mysql/time_zone.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_transition.frm to /data/xtra/mysql/time_zone_transition.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_transition.MYI to /data/xtra/mysql/time_zone_transition.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_transition.MYD to /data/xtra/mysql/time_zone_transition.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_transition_type.frm to /data/xtra/mysql/time_zone_transition_type.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_transition_type.MYI to /data/xtra/mysql/time_zone_transition_type.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_transition_type.MYD to /data/xtra/mysql/time_zone_transition_type.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_leap_second.frm to /data/xtra/mysql/time_zone_leap_second.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_leap_second.MYI to /data/xtra/mysql/time_zone_leap_second.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/time_zone_leap_second.MYD to /data/xtra/mysql/time_zone_leap_second.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/proc.frm to /data/xtra/mysql/proc.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/proc.MYI to /data/xtra/mysql/proc.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/proc.MYD to /data/xtra/mysql/proc.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/procs_priv.frm to /data/xtra/mysql/procs_priv.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/procs_priv.MYI to /data/xtra/mysql/procs_priv.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/procs_priv.MYD to /data/xtra/mysql/procs_priv.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/general_log.frm to /data/xtra/mysql/general_log.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/general_log.CSM to /data/xtra/mysql/general_log.CSM
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/general_log.CSV to /data/xtra/mysql/general_log.CSV
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/slow_log.frm to /data/xtra/mysql/slow_log.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/slow_log.CSM to /data/xtra/mysql/slow_log.CSM
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/slow_log.CSV to /data/xtra/mysql/slow_log.CSV
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/event.frm to /data/xtra/mysql/event.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/event.MYI to /data/xtra/mysql/event.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/event.MYD to /data/xtra/mysql/event.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/ndb_binlog_index.frm to /data/xtra/mysql/ndb_binlog_index.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/ndb_binlog_index.MYI to /data/xtra/mysql/ndb_binlog_index.MYI
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/ndb_binlog_index.MYD to /data/xtra/mysql/ndb_binlog_index.MYD
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/proxies_priv.frm to /data/xtra/mysql/proxies_priv.frm
200616 14:51:41 [01] ...done
200616 14:51:41 [01] Copying ./mysql/proxies_priv.MYI to /data/xtra/mysql/proxies_priv.MYI
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./mysql/proxies_priv.MYD to /data/xtra/mysql/proxies_priv.MYD
200616 14:51:42 [01] ...done
200616 14:51:42 [00] Writing test/db.opt
200616 14:51:42 [00] ...done
200616 14:51:42 [01] Copying ./performance_schema/db.opt to /data/xtra/performance_schema/db.opt
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/cond_instances.frm to /data/xtra/performance_schema/cond_instances.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/events_waits_current.frm to /data/xtra/performance_schema/events_waits_current.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/events_waits_history.frm to /data/xtra/performance_schema/events_waits_history.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/events_waits_history_long.frm to /data/xtra/performance_schema/events_waits_history_long.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/events_waits_summary_by_instance.frm to /data/xtra/performance_schema/events_waits_summary_by_instance.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/events_waits_summary_by_thread_by_event_name.frm to /data/xtra/performance_schema/events_waits_summary_by_thread_by_event_name.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/events_waits_summary_global_by_event_name.frm to /data/xtra/performance_schema/events_waits_summary_global_by_event_name.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/file_instances.frm to /data/xtra/performance_schema/file_instances.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/file_summary_by_event_name.frm to /data/xtra/performance_schema/file_summary_by_event_name.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/file_summary_by_instance.frm to /data/xtra/performance_schema/file_summary_by_instance.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/mutex_instances.frm to /data/xtra/performance_schema/mutex_instances.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/performance_timers.frm to /data/xtra/performance_schema/performance_timers.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/rwlock_instances.frm to /data/xtra/performance_schema/rwlock_instances.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/setup_consumers.frm to /data/xtra/performance_schema/setup_consumers.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/setup_instruments.frm to /data/xtra/performance_schema/setup_instruments.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/setup_timers.frm to /data/xtra/performance_schema/setup_timers.frm
200616 14:51:42 [01] ...done
200616 14:51:42 [01] Copying ./performance_schema/threads.frm to /data/xtra/performance_schema/threads.frm
200616 14:51:42 [01] ...done
200616 14:51:42 Finished backing up non-InnoDB tables and files
200616 14:51:42 [00] Writing xtrabackup_binlog_info
200616 14:51:42 [00] ...done
200616 14:51:42 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...
xtrabackup: The latest check point (for incremental): '1597945'
xtrabackup: Stopping log copying thread.
.200616 14:51:42 >> log scanned up to (1597945)
200616 14:51:42 Executing UNLOCK TABLES
200616 14:51:42 All tables unlocked
200616 14:51:42 Backup created in directory '/data/xtra'
MySQL binlog position: filename 'mysql_bin.000005', position '245'
200616 14:51:42 [00] Writing backup-my.cnf
200616 14:51:42 [00] ...done
200616 14:51:42 [00] Writing xtrabackup_info
200616 14:51:42 [00] ...done
xtrabackup: Transaction log of lsn (1597945) to (1597945) was copied.
200616 14:51:42 completed OK!
(3)其他选择
[root@centos01 ~]#bash mysql_back_up.sh
Do you want to back up [y/n]? n
[root@centos01 ~]#bash mysql_back_up.sh
Do you want to back up [y/n]? y
Please select the way to backup:
1)mysqldump
2)xtrabackup
input the number 3
please select correct number !
[root@centos01 ~]#bash mysql_back_up.sh
Do you want to back up [y/n]? o
please input correct answer !
2、配置Mysql主从同步
(1)修改主服务器配置文件
[root@centos7 ~]#vim /etc/my.cnf
server-id=1 #添加
(2)重启服务
[root@centos7 ~]#systemctl restart mariadb.service
(3)创建账号并查看二进制日志位置
MariaDB [(none)]> grant replication slave on *.* to repluser@'192.168.44.%' identified by '520109';
MariaDB [(none)]> show master logs;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000001 | 8156 |
| mysql-bin.000002 | 30373 |
| mysql-bin.000003 | 1038814 |
| mysql-bin.000004 | 1042 |
| mysql-bin.000005 | 264 |
| mysql-bin.000006 | 30373 |
| mysql-bin.000007 | 1038814 |
| mysql-bin.000008 | 264 |
| mysql-bin.000009 | 400 |
+------------------+-----------+
(4)修改从服务器配置文件并重启
[root@localhost ~]# vim /etc/my.cnf
[mysqld]
server-id=2 #添加
[root@localhost ~]# systemctl restart mariadb.service
(5)配置从服务器并查看
MariaDB [(none)]> CHANGE MASTER TO
-> MASTER_HOST='192.168.44.70',
-> MASTER_USER='repluser',
-> MASTER_PASSWORD='520109',
-> MASTER_PORT=3306,
-> MASTER_LOG_FILE='mysql-bin.000009',
-> MASTER_LOG_POS=400;
MariaDB [(none)]> show slave status\G
Slave_IO_State:
Master_Host: 192.168.44.70
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000009
Read_Master_Log_Pos: 400
Relay_Log_File: mariadb-relay-bin.000001
Relay_Log_Pos: 4
Relay_Master_Log_File: mysql-bin.000009
Slave_IO_Running: No
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: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 400
Relay_Log_Space: 245
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: NULL
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: 0
(6)启动从服务再查看
MariaDB [(none)]> start slave;
MariaDB [(none)]> show slave status\G
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.44.70
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000009
Read_Master_Log_Pos: 483
Relay_Log_File: mariadb-relay-bin.000002
Relay_Log_Pos: 612
Relay_Master_Log_File: mysql-bin.000009
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
3、使用MHA实现Mysql高可用
提前将所需MHA包传送至各个主机，管理主机两个，其他均只需要node包
1、配置好主从服务器的配置文件
主服务器配置如下
[mysqld]
server-id=79
log-bin
skip_name_resolve
从服务器配置如下
[mysqld]
server-id=72
log-bin
read-only
skip_name_resolve
relay_log_purge=0
2、启动主从服务器
[root@localhost ~]# systemctl start mariadb.service
3、主服务器添加远程连接用户和管理节点
MariaDB [(none)]> grant replication slave on *.* to repluser@'192.168.44.%' identified by '110110';
MariaDB [(none)]> grant all on *.* to mhauser@'192.168.44.%' identified by '110110';
MariaDB [(none)]> select host,user,password from mysql.user;
+-----------------------+----------+-------------------------------------------+
| host | user | password |
+-----------------------+----------+-------------------------------------------+
| localhost | root | |
| localhost.localdomain | root | |
| 127.0.0.1 | root | |
| ::1 | root | |
| localhost | | |
| localhost.localdomain | | |
| 192.168.44.% | repluser | *BEF29CC9D1F7509710900A5782022DDC6092632B |
| 192.168.44.% | mhauser | *BEF29CC9D1F7509710900A5782022DDC6092632B |
+-----------------------+----------+-------------------------------------------+
8 rows in set (0.00 sec)
4、配置从服务器(两台同样)
MariaDB [(none)]> CHANGE MASTER TO
-> MASTER_HOST='192.168.44.79',
-> MASTER_USER='repluser',
-> MASTER_PASSWORD='110110',
-> MASTER_PORT=3306,
-> MASTER_LOG_FILE='mariadb-bin.000001',
-> MASTER_LOG_POS=245;
Query OK, 0 rows affected (0.02 sec)
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: 192.168.44.79
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mariadb-bin.000001
Read_Master_Log_Pos: 695
Relay_Log_File: mariadb-relay-bin.000002
Relay_Log_Pos: 981
Relay_Master_Log_File: mariadb-bin.000001
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: 695
Relay_Log_Space: 1277
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: 79
1 row in set (0.00 sec)
5、各主机安装MHA对应包
[root@centos7 ~]# yum install mha*.rpm #利用yum避免依赖性错误
6、配置所有主机间的key验证
[root@centos7 ~]# 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:b5ywn20liAWbWzgtCN6lZCHA2EH+EC97YRyoziRt3us [email protected]
The key's randomart image is:
+---[RSA 2048]----+
| ==+o .. |
|..++.oo o |
| o+.== + * |
|o.o*..+ * + |
|=o..o SB . |
| o... o=... . |
| . . = o |
| . o o. |
| .E o.. |
+----[SHA256]-----+
[root@centos7 ~]# ssh-copy-id 192.168.44.71
[root@centos7 ~]# cd .ssh
[root@centos7 .ssh]# cat authorized_keys
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQComu6VuYN0h+Ir0dQvzUnW3u04O3PwiBDnwDMG/6fHmgPQWSp6NanajURC5b3OQ+eQnoqvrlfMbKXlu4bdByylBQ4xvcrmMzpRfj62HXjdo0g1yacp4/R6A1OYekdKsxMeYfPh9kEnFiHljPR04rf66bfPJ9X/7SfwPiJoepQbpxGYLe9qXWPjDYPgaEsgYrqq1LmvgfAmhs07/WyOsDdr6E8PL0b16BXeRxfVTip417WUNt3mJ2Rv3n91gHrl5LDFElfzZGlWuJW4hayZppeoc/KcKzOdmdK/cxdYzC5VcZa3PjX3tM7dr+HP+Pq6vD6pyVoyD4bRQ75j0VshGfn1 [email protected]
[root@centos7 ~]# scp -r .ssh 192.168.44.79:/root/
[root@centos7 ~]# scp -r .ssh 192.168.44.72:/root/
[root@centos7 ~]# scp -r .ssh 192.168.44.73:/root/
7、配置管理节点
[root@centos7 ~]# vim /etc/mha/app1.cnf
[server default]
user=mhauser
password=110110
manager_workdir=/data/mastermha/app1/
manager_log=/data/mastermha/app1/manager.log
remote_workdir=/data/mastermha/app1/
ssh_user=root
repl_user=repluser
repl_password=110110
ping_interval=1
[server1]
hostname=192.168.44.79
candidate_master=1
[server2]
hostname=192.168.44.72
[server3]
hostname=192.168.44.73
candidate_master=1
8、MHA验证
[root@centos7 ~]# masterha_check_ssh --conf=/etc/mha/app1.cnf #ssh连接检查
Mon Mar 16 22:42:13 2020 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Mon Mar 16 22:42:13 2020 - [info] Reading application default configuration from /etc/mha/app1.cnf..
Mon Mar 16 22:42:13 2020 - [info] Reading server configuration from /etc/mha/app1.cnf..
Mon Mar 16 22:42:13 2020 - [info] Starting SSH connection tests..
Mon Mar 16 22:42:14 2020 - [debug]
Mon Mar 16 22:42:13 2020 - [debug] Connecting via SSH from [email protected](192.168.44.79:22) to [email protected](192.168.44.72:22)..
Warning: Permanently added '192.168.44.72' (ECDSA) to the list of known hosts.
Mon Mar 16 22:42:13 2020 - [debug] ok.
Mon Mar 16 22:42:13 2020 - [debug] Connecting via SSH from [email protected](192.168.44.79:22) to [email protected](192.168.44.73:22)..
Warning: Permanently added '192.168.44.73' (ECDSA) to the list of known hosts.
Mon Mar 16 22:42:14 2020 - [debug] ok.
Mon Mar 16 22:42:14 2020 - [debug]
Mon Mar 16 22:42:13 2020 - [debug] Connecting via SSH from [email protected](192.168.44.72:22) to [email protected](192.168.44.79:22)..
Mon Mar 16 22:42:14 2020 - [debug] ok.
Mon Mar 16 22:42:14 2020 - [debug] Connecting via SSH from [email protected](192.168.44.72:22) to [email protected](192.168.44.73:22)..
Warning: Permanently added '192.168.44.73' (ECDSA) to the list of known hosts.
Mon Mar 16 22:42:14 2020 - [debug] ok.
Mon Mar 16 22:42:15 2020 - [debug]
Mon Mar 16 22:42:14 2020 - [debug] Connecting via SSH from [email protected](192.168.44.73:22) to [email protected](192.168.44.79:22)..
Mon Mar 16 22:42:14 2020 - [debug] ok.
Mon Mar 16 22:42:14 2020 - [debug] Connecting via SSH from [email protected](192.168.44.73:22) to [email protected](192.168.44.72:22)..
Mon Mar 16 22:42:15 2020 - [debug] ok.
Mon Mar 16 22:42:15 2020 - [info] All SSH connection tests passed successfully.
[root@centos7 ~]# masterha_check_repl --conf=/etc/mha/app1.cnf #复制检查
.......
Mon Mar 16 22:47:27 2020 - [info] Checking replication health on 192.168.44.72..
Mon Mar 16 22:47:27 2020 - [info] ok.
Mon Mar 16 22:47:27 2020 - [info] Checking replication health on 192.168.44.73..
Mon Mar 16 22:47:27 2020 - [info] ok.
Mon Mar 16 22:47:27 2020 - [warning] master_ip_failover_script is not defined.
Mon Mar 16 22:47:27 2020 - [warning] shutdown_script is not defined.
Mon Mar 16 22:47:27 2020 - [info] Got exit code 0 (Not master dead).
MySQL Replication Health is OK.
9、MHA启动
[root@centos7 ~]# masterha_manager --conf=/etc/mha/app1.cnf
Mon Mar 16 22:51:28 2020 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Mon Mar 16 22:51:28 2020 - [info] Reading application default configuration from /etc/mha/app1.cnf..
Mon Mar 16 22:51:28 2020 - [info] Reading server configuration from /etc/mha/app1.cnf..
处于持续监控状态
10、模拟主服务器出故障
先跑一个生成较大数据库的脚本
MariaDB [(none)]> use test
Database changed
MariaDB [test]> create table testlog (id int auto_increment primary key,name char(10),age int default 20);
Query OK, 0 rows affected (0.00 sec)
MariaDB [test]>
MariaDB [test]> delimiter $$
MariaDB [test]>
MariaDB [test]> create procedure sp_testlog()
-> begin
-> declare i int;
-> set i = 1;
-> while i <= 100000
-> do insert into testlog(name,age) values (concat('wang',i),i);
-> set i = i +1;
-> end while;
-> end$$
Query OK, 0 rows affected (0.00 sec)
MariaDB [test]>
MariaDB [test]> delimiter ;
MariaDB [test]> call sp_testlog;
未完成中间直接“断电”模拟宕机，此时可以发现管理主机监控发生改变并退出
Mon Mar 16 22:56:03 2020 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Mon Mar 16 22:56:03 2020 - [info] Reading application default configuration from /etc/mha/app1.cnf..
Mon Mar 16 22:56:03 2020 - [info] Reading server configuration from /etc/mha/app1.cnf..
查看日志
[root@centos7 ~]# tail -f /data/mastermha/app1/manager.log
Started automated(non-interactive) failover.
The latest slave 192.168.44.72(192.168.44.72:3306) has all relay logs for recovery.
Selected 192.168.44.73(192.168.44.73:3306) as a new master.
192.168.44.73(192.168.44.73:3306): OK: Applying all logs succeeded.
192.168.44.72(192.168.44.72:3306): This host has the latest relay log events.
Generating relay diff files from the latest slave succeeded.
192.168.44.72(192.168.44.72:3306): OK: Applying all logs succeeded. Slave started, replicating from 192.168.44.73(192.168.44.73:3306)
192.168.44.73(192.168.44.73:3306): Resetting slave info succeeded.
Master failover to 192.168.44.73(192.168.44.73:3306) completed successfully.
提示192.168.44.73成为新的主服务器，验证查看
MariaDB [(none)]> show slave status\G
Empty set (0.00 sec)
在73上创建新的库，72上复制也成功
提示：在从服务器提升为主服务器后，必须人为去修改配置文件，将"read-only"删掉或注释掉
为防止监控前台运行被人为关掉，可改为后台执行