MySQL5.7+MHA+Keepalived failover自动切换-云搜网

数据库架构：一主两从

master：192.168.8.57

slave1：192.168.8.58

slave2：192.168.8.59

manager：192.168.8.60

MHA工具包：

mha4mysql-manager-0.58.tar.gz

mha4mysql-node-0.58.tar.gz

keepalived-1.4.5.tar.gz

一、环境配置过程如下：

http://blog.itpub.net/30135314/viewspace-2217762/

二、切换测试

1.在192.168.8.57关闭MySQL进程

1	`mysqladmin -uroot -pmysql` `shutdown`

2.查看MHA manager日志

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Mon Oct 29 13:55:18 2018 - [warning] Got error on MySQL
select

ping
: 2006 (MySQL server has gone away)

Mon Oct 29 13:55:18 2018 - [info] Executing secondary network check script:
/usr/local/bin/masterha_secondary_check

-s 192.168.8.58 -s 192.168.8.59 --user=root --master_host=192.168.8.57 --master_ip=192.168.8.57 --master_port=3306 --master_user=root --master_password=mysql --ping_type=SELECT

Mon Oct 29 13:55:18 2018 - [info] Executing SSH check script:
exit

Mon Oct 29 13:55:18 2018 - [info] HealthCheck: SSH to 192.168.8.57 is reachable.

Monitoring server 192.168.8.58 is reachable, Master is not reachable from 192.168.8.58. OK.

Mon Oct 29 13:55:19 2018 - [warning] Got error on MySQL connect: 2003 (Can
't connect to MySQL server on '
192.168.8.57' (111))

Mon Oct 29 13:55:19 2018 - [warning] Connection failed 2
time
(s)..

Monitoring server 192.168.8.59 is reachable, Master is not reachable from 192.168.8.59. OK.

Mon Oct 29 13:55:19 2018 - [info] Master is not reachable from all other monitoring servers. Failover should start.

Mon Oct 29 13:55:20 2018 - [warning] Got error on MySQL connect: 2003 (Can
't connect to MySQL server on '
192.168.8.57' (111))

Mon Oct 29 13:55:20 2018 - [warning] Connection failed 3
time
(s)..

Mon Oct 29 13:55:21 2018 - [warning] Got error on MySQL connect: 2003 (Can
't connect to MySQL server on '
192.168.8.57' (111))

Mon Oct 29 13:55:21 2018 - [warning] Connection failed 4
time
(s)..

Mon Oct 29 13:55:21 2018 - [warning] Master is not reachable from health checker!

Mon Oct 29 13:55:21 2018 - [warning] Master 192.168.8.57(192.168.8.57:3306) is not reachable!

Mon Oct 29 13:55:21 2018 - [warning] SSH is reachable.

Mon Oct 29 13:55:21 2018 - [info] Connecting to a master server failed. Reading configuration
file

/etc/masterha_default
.cnf and
/etc/masterha/app1
.cnf again, and trying to connect to all servers to check server status..

Mon Oct 29 13:55:21 2018 - [warning] Global configuration
file

/etc/masterha_default
.cnf not found. Skipping.

Mon Oct 29 13:55:21 2018 - [info] Reading application default configuration from
/etc/masterha/app1
.cnf..

Mon Oct 29 13:55:21 2018 - [info] Reading server configuration from
/etc/masterha/app1
.cnf..

Mon Oct 29 13:55:22 2018 - [info] GTID failover mode = 1

Mon Oct 29 13:55:22 2018 - [info] Dead Servers:

Mon Oct 29 13:55:22 2018 - [info] 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:22 2018 - [info] Alive Servers:

Mon Oct 29 13:55:22 2018 - [info] 192.168.8.58(192.168.8.58:3306)

Mon Oct 29 13:55:22 2018 - [info] 192.168.8.59(192.168.8.59:3306)

Mon Oct 29 13:55:22 2018 - [info] Alive Slaves:

Mon Oct 29 13:55:22 2018 - [info] 192.168.8.58(192.168.8.58:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabled

Mon Oct 29 13:55:22 2018 - [info] GTID ON

Mon Oct 29 13:55:22 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:22 2018 - [info] Primary candidate
for

the new Master (candidate_master is
set
)

Mon Oct 29 13:55:22 2018 - [info] 192.168.8.59(192.168.8.59:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabled

Mon Oct 29 13:55:22 2018 - [info] GTID ON

Mon Oct 29 13:55:22 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:22 2018 - [info] Checking slave configurations..

Mon Oct 29 13:55:22 2018 - [info] read_only=1 is not
set

on slave 192.168.8.58(192.168.8.58:3306).

Mon Oct 29 13:55:22 2018 - [info] read_only=1 is not
set

on slave 192.168.8.59(192.168.8.59:3306).

Mon Oct 29 13:55:22 2018 - [info] Checking replication filtering settings..

Mon Oct 29 13:55:22 2018 - [info] Replication filtering check ok.

Mon Oct 29 13:55:22 2018 - [info] Master is down!

Mon Oct 29 13:55:22 2018 - [info] Terminating monitoring script.

Mon Oct 29 13:55:22 2018 - [info] Got
exit

code 20 (Master dead).

Mon Oct 29 13:55:22 2018 - [info] MHA::MasterFailover version 0.58.

Mon Oct 29 13:55:22 2018 - [info] Starting master failover.

Mon Oct 29 13:55:22 2018 - [info]

Mon Oct 29 13:55:22 2018 - [info] * Phase 1: Configuration Check Phase..

Mon Oct 29 13:55:22 2018 - [info]

Mon Oct 29 13:55:23 2018 - [info] GTID failover mode = 1

Mon Oct 29 13:55:23 2018 - [info] Dead Servers:

Mon Oct 29 13:55:23 2018 - [info] 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:23 2018 - [info] Checking master reachability via MySQL(double check)...

Mon Oct 29 13:55:23 2018 - [info] ok.

Mon Oct 29 13:55:23 2018 - [info] Alive Servers:

Mon Oct 29 13:55:23 2018 - [info] 192.168.8.58(192.168.8.58:3306)

Mon Oct 29 13:55:23 2018 - [info] 192.168.8.59(192.168.8.59:3306)

Mon Oct 29 13:55:23 2018 - [info] Alive Slaves:

Mon Oct 29 13:55:23 2018 - [info] 192.168.8.58(192.168.8.58:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabled

Mon Oct 29 13:55:23 2018 - [info] GTID ON

Mon Oct 29 13:55:23 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:23 2018 - [info] Primary candidate
for

the new Master (candidate_master is
set
)

Mon Oct 29 13:55:23 2018 - [info] 192.168.8.59(192.168.8.59:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabled

Mon Oct 29 13:55:23 2018 - [info] GTID ON

Mon Oct 29 13:55:23 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:23 2018 - [info] Starting GTID based failover.

Mon Oct 29 13:55:23 2018 - [info]

Mon Oct 29 13:55:23 2018 - [info] ** Phase 1: Configuration Check Phase completed.

Mon Oct 29 13:55:23 2018 - [info]

Mon Oct 29 13:55:23 2018 - [info] * Phase 2: Dead Master Shutdown Phase..

Mon Oct 29 13:55:23 2018 - [info]

Mon Oct 29 13:55:23 2018 - [info] Forcing
shutdown

so that applications never connect to the current master..

Mon Oct 29 13:55:23 2018 - [info] Executing master IP deactivation script:

Mon Oct 29 13:55:23 2018 - [info]
/usr/local/bin/master_ip_failover

--orig_master_host=192.168.8.57 --orig_master_ip=192.168.8.57 --orig_master_port=3306 --
command
=stopssh --ssh_user=root

Mon Oct 29 13:55:24 2018 - [info]
done
.

Mon Oct 29 13:55:24 2018 - [warning] shutdown_script is not
set
. Skipping explicit shutting down of the dead master.

Mon Oct 29 13:55:24 2018 - [info] * Phase 2: Dead Master Shutdown Phase completed.

Mon Oct 29 13:55:24 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] * Phase 3: Master Recovery Phase..

Mon Oct 29 13:55:24 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] * Phase 3.1: Getting Latest Slaves Phase..

Mon Oct 29 13:55:24 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] The latest binary log
file
/position

on all slaves is mysql-bin.000020:375

Mon Oct 29 13:55:24 2018 - [info] Retrieved Gtid Set: a92f70a4-d5ea-11e8-af28-080027c0450d:11-13

Mon Oct 29 13:55:24 2018 - [info] Latest slaves (Slaves that received relay log files to the latest):

Mon Oct 29 13:55:24 2018 - [info] 192.168.8.58(192.168.8.58:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabled

Mon Oct 29 13:55:24 2018 - [info] GTID ON

Mon Oct 29 13:55:24 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:24 2018 - [info] Primary candidate
for

the new Master (candidate_master is
set
)

Mon Oct 29 13:55:24 2018 - [info] 192.168.8.59(192.168.8.59:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabled

Mon Oct 29 13:55:24 2018 - [info] GTID ON

Mon Oct 29 13:55:24 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:24 2018 - [info] The oldest binary log
file
/position

on all slaves is mysql-bin.000020:375

Mon Oct 29 13:55:24 2018 - [info] Retrieved Gtid Set: a92f70a4-d5ea-11e8-af28-080027c0450d:11-13

Mon Oct 29 13:55:24 2018 - [info] Oldest slaves:

Mon Oct 29 13:55:24 2018 - [info] 192.168.8.58(192.168.8.58:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabled

Mon Oct 29 13:55:24 2018 - [info] GTID ON

Mon Oct 29 13:55:24 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:24 2018 - [info] Primary candidate
for

the new Master (candidate_master is
set
)

Mon Oct 29 13:55:24 2018 - [info] 192.168.8.59(192.168.8.59:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabled

Mon Oct 29 13:55:24 2018 - [info] GTID ON

Mon Oct 29 13:55:24 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:24 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] * Phase 3.3: Determining New Master Phase..

Mon Oct 29 13:55:24 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] Searching new master from slaves..

Mon Oct 29 13:55:24 2018 - [info] Candidate masters from the configuration
file
:

Mon Oct 29 13:55:24 2018 - [info] 192.168.8.58(192.168.8.58:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabled

Mon Oct 29 13:55:24 2018 - [info] GTID ON

Mon Oct 29 13:55:24 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)

Mon Oct 29 13:55:24 2018 - [info] Primary candidate
for

the new Master (candidate_master is
set
)

Mon Oct 29 13:55:24 2018 - [info] Non-candidate masters:

Mon Oct 29 13:55:24 2018 - [info] Searching from candidate_master slaves
which

have received the latest relay log events..

Mon Oct 29 13:55:24 2018 - [info] New master is 192.168.8.58(192.168.8.58:3306)

Mon Oct 29 13:55:24 2018 - [info] Starting master failover..

Mon Oct 29 13:55:24 2018 - [info]

From:

192.168.8.57(192.168.8.57:3306) (current master)

+--192.168.8.58(192.168.8.58:3306)

+--192.168.8.59(192.168.8.59:3306)

To:

192.168.8.58(192.168.8.58:3306) (new master)

+--192.168.8.59(192.168.8.59:3306)

Mon Oct 29 13:55:24 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] * Phase 3.3: New Master Recovery Phase..

Mon Oct 29 13:55:24 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] Waiting all logs to be applied..

Mon Oct 29 13:55:24 2018 - [info]
done
.

Mon Oct 29 13:55:24 2018 - [info] Getting new master's binlog name and position..

Mon Oct 29 13:55:24 2018 - [info] mysql-bin.000021:415

Mon Oct 29 13:55:24 2018 - [info] All other slaves should start replication from here. Statement should be: CHANGE MASTER TO MASTER_HOST=
'192.168.8.58'
, MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER=
'repl'
, MASTER_PASSWORD=
'xxx'
;

Mon Oct 29 13:55:24 2018 - [info] Master Recovery succeeded. File:Pos:Exec_Gtid_Set: mysql-bin.000021, 415, a92f70a4-d5ea-11e8-af28-080027c0450d:1-13,

a92f70a4-d5ea-11e8-af28-080027c0450f:1-7

Mon Oct 29 13:55:24 2018 - [info] Executing master IP activate script:

Mon Oct 29 13:55:24 2018 - [info]
/usr/local/bin/master_ip_failover

--
command
=start --ssh_user=root --orig_master_host=192.168.8.57 --orig_master_ip=192.168.8.57 --orig_master_port=3306 --new_master_host=192.168.8.58 --new_master_ip=192.168.8.58 --new_master_port=3306 --new_master_user=
'root'

--new_master_password=xxx

Undefined subroutine &main::FIXME_xxx_create_user called at
/usr/local/bin/master_ip_failover

line 94.

Set read_only=0 on the new master.

Creating app user on the new master..

Mon Oct 29 13:55:24 2018 - [error][
/usr/lib/perl5/vendor_perl/MHA/MasterFailover
.pm, ln1612] Failed to activate master IP address
for

192.168.8.58(192.168.8.58:3306) with
return

code 10:0

Mon Oct 29 13:55:24 2018 - [warning] Proceeding.

Mon Oct 29 13:55:24 2018 - [info] ** Finished master recovery successfully.

Mon Oct 29 13:55:24 2018 - [info] * Phase 3: Master Recovery Phase completed.

Mon Oct 29 13:55:24 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] * Phase 4: Slaves Recovery Phase..

Mon Oct 29 13:55:24 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] * Phase 4.1: Starting Slaves
in

parallel..

Mon Oct 29 13:55:24 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] -- Slave recovery on host 192.168.8.59(192.168.8.59:3306) started, pid: 7627. Check tmp log
/var/log/masterha/app1/192
.168.8.59_3306_20181029135522.log
if

it takes
time
..

Mon Oct 29 13:55:25 2018 - [info]

Mon Oct 29 13:55:25 2018 - [info] Log messages from 192.168.8.59 ...

Mon Oct 29 13:55:25 2018 - [info]

Mon Oct 29 13:55:24 2018 - [info] Resetting slave 192.168.8.59(192.168.8.59:3306) and starting replication from the new master 192.168.8.58(192.168.8.58:3306)..

Mon Oct 29 13:55:24 2018 - [info] Executed CHANGE MASTER.

Mon Oct 29 13:55:24 2018 - [info] Slave started.

Mon Oct 29 13:55:24 2018 - [info] gtid_wait(a92f70a4-d5ea-11e8-af28-080027c0450d:1-13,

a92f70a4-d5ea-11e8-af28-080027c0450f:1-7) completed on 192.168.8.59(192.168.8.59:3306). Executed 0 events.

Mon Oct 29 13:55:25 2018 - [info] End of log messages from 192.168.8.59.

Mon Oct 29 13:55:25 2018 - [info] -- Slave on host 192.168.8.59(192.168.8.59:3306) started.

Mon Oct 29 13:55:25 2018 - [info] All new slave servers recovered successfully.

Mon Oct 29 13:55:25 2018 - [info]

Mon Oct 29 13:55:25 2018 - [info] * Phase 5: New master cleanup phase..

Mon Oct 29 13:55:25 2018 - [info]

Mon Oct 29 13:55:25 2018 - [info] Resetting slave info on the new master..

Mon Oct 29 13:55:25 2018 - [info] 192.168.8.58: Resetting slave info succeeded.

Mon Oct 29 13:55:25 2018 - [info] Master failover to 192.168.8.58(192.168.8.58:3306) completed successfully.

Mon Oct 29 13:55:25 2018 - [info] Deleted server1 entry from
/etc/masterha/app1
.cnf .

Mon Oct 29 13:55:25 2018 - [info]

----- Failover Report -----

app1: MySQL Master failover 192.168.8.57(192.168.8.57:3306) to 192.168.8.58(192.168.8.58:3306) succeeded

Master 192.168.8.57(192.168.8.57:3306) is down!

Check MHA Manager logs at manager:
/var/log/masterha/app1/manager
.log
for

details.

Started automated(non-interactive) failover.

Invalidated master IP address on 192.168.8.57(192.168.8.57:3306)

Selected 192.168.8.58(192.168.8.58:3306) as a new master.

192.168.8.58(192.168.8.58:3306): OK: Applying all logs succeeded.

Failed to activate master IP address
for

192.168.8.58(192.168.8.58:3306) with
return

code 10:0

192.168.8.59(192.168.8.59:3306): OK: Slave started, replicating from 192.168.8.58(192.168.8.58:3306)

192.168.8.58(192.168.8.58:3306): Resetting slave info succeeded.

Master failover to 192.168.8.58(192.168.8.58:3306) completed successfully.

Mon Oct 29 13:55:25 2018 - [info] Sending mail..

Unknown option: conf

可以看到192.168.8.57上MySQL进程宕掉之后，新主库切至192.168.8.58，和192.168.8.59形成新的主从环境。

3.查看VIP

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: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link
/ether

08:00:27:4d:70:17 brd ff:ff:ff:ff:ff:ff

inet 192.168.8.58
/24

brd 192.168.8.255 scope global noprefixroute enp0s3

valid_lft forever preferred_lft forever

inet 192.168.8.88
/24

scope global secondary enp0s3

valid_lft forever preferred_lft forever

inet6 fe80::6a31:3e92:8b6f:83c0
/64

scope link noprefixroute

valid_lft forever preferred_lft forever

inet6 fe80::5198:593b:cdc5:1f90
/64

scope link tentative noprefixroute dadfailed

valid_lft forever preferred_lft forever

3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000

link
/ether

52:54:00:f4:55:bb brd ff:ff:ff:ff:ff:ff

inet 192.168.122.1
/24

brd 192.168.122.255 scope global virbr0

valid_lft forever preferred_lft forever

4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000

link
/ether

52:54:00:f4:55:bb brd ff:ff:ff:ff:ff:ff

VIP192.168.8.88/24已经飘至192.168.8.58机器。

4.查看slave进程

192.168.8.58

1 2	`mysql> show slave status \G` `Empty` `set` `(0.00 sec)`

192.168.8.59

mysql> show slave status \G

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

Slave_IO_State: Waiting
for

master
to

send event

Master_Host: 192.168.8.58

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000021

Read_Master_Log_Pos: 415

Relay_Log_File: slave2-relay-bin.000002

Relay_Log_Pos: 414

Relay_Master_Log_File: mysql-bin.000021

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: 415

Relay_Log_Space: 622

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: 58

Master_UUID: a92f70a4-d5ea-11e8-af28-080027c0450f

Master_Info_File: /mysql/data/master.info

SQL_Delay: 0

SQL_Remaining_Delay:
NULL

Slave_SQL_Running_State: Slave 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: a92f70a4-d5ea-11e8-af28-080027c0450b:1-4,

a92f70a4-d5ea-11e8-af28-080027c0450d:1-13,

a92f70a4-d5ea-11e8-af28-080027c0450f:1-7

Auto_Position: 1

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

可以看到从库192.168.8.59的主库变成192.168.8.58

5.测试复制

192.168.8.58（主库）

mysql>
create

table

t10 (id
int
(10));

Query OK, 0
rows

affected (0.19 sec)

mysql> show tables;

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

| Tables_in_test |

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

| t1 |

| t10 |

| t2 |

| t3 |

| t4 |

| t5 |

| t6 |

| t7 |

| t8 |

| t9 |

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

192.168.8.59（从库）

mysql> show tables;

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

| Tables_in_test |

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

| t1 |

| t10 |

| t2 |

| t3 |

| t4 |

| t5 |

| t6 |

| t7 |

| t8 |

| t9 |

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

新的主从数据复制正常。

三、将旧主库加入复制环境

修复完192.168.8.57之后，将此节点变成从库加入到环境当中，可以直接change master to

change master
to

master_host=
'192.168.8.58'
,

master_port=3306,

master_user=
'repl'
,

master_password=
'mysql'
,

master_auto_position=1;

mysql> start slave;

Query OK, 0
rows

affected (0.07 sec)

mysql>
set

global

read_only=1;

Query OK, 0
rows

affected (0.00 sec)

mysql> show slave status\G

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

Slave_IO_State: Waiting
for

master
to

send event

Master_Host: 192.168.8.58

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000021

Read_Master_Log_Pos: 583

Relay_Log_File: master-relay-bin.000002

Relay_Log_Pos: 582

Relay_Master_Log_File: mysql-bin.000021

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: 583

Relay_Log_Space: 830

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: 58

Master_UUID: a92f70a4-d5ea-11e8-af28-080027c0450f

Master_Info_File: /mysql/data/master.info

SQL_Delay: 0

SQL_Remaining_Delay:
NULL

Slave_SQL_Running_State: Slave 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: a92f70a4-d5ea-11e8-af28-080027c0450f:8

Executed_Gtid_Set: a92f70a4-d5ea-11e8-af28-080027c0450d:1-13,

a92f70a4-d5ea-11e8-af28-080027c0450f:1-8

Auto_Position: 1

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

查看t10有没有复制到192.168.8.57

mysql> show tables;

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

| Tables_in_test |

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

| t1 |

| t10 |

| t2 |

| t3 |

| t4 |

| t5 |

| t6 |

| t7 |

| t8 |

| t9 |

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

修改/etc/masterha/app1.cnf，将[server1]添加上

四、将复制还原到原始状态（主库为192.168.8.57）

1.重置复制

192.168.8.57

mysql> stop slave;

Query OK, 0
rows

affected (0.01 sec)

mysql> show slave status \G

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

Slave_IO_State:

Master_Host: 192.168.8.58

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000021

Read_Master_Log_Pos: 583

Relay_Log_File: master-relay-bin.000003

Relay_Log_Pos: 454

Relay_Master_Log_File: mysql-bin.000021

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: 583

Relay_Log_Space: 1090

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: 58

Master_UUID: a92f70a4-d5ea-11e8-af28-080027c0450f

Master_Info_File: /mysql/data/master.info

SQL_Delay: 0

SQL_Remaining_Delay:
NULL

Slave_SQL_Running_State:

Master_Retry_Count: 86400

Master_Bind:

Last_IO_Error_Timestamp:

Last_SQL_Error_Timestamp:

Master_SSL_Crl:

Master_SSL_Crlpath:

Retrieved_Gtid_Set: a92f70a4-d5ea-11e8-af28-080027c0450f:8

Executed_Gtid_Set: a92f70a4-d5ea-11e8-af28-080027c0450d:1-13,

a92f70a4-d5ea-11e8-af28-080027c0450f:1-8

Auto_Position: 1

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

192.168.8.58

mysql> reset slave;

Query OK, 0
rows

affected (0.00 sec)

mysql>
set

global

read_only=1;

Query OK, 0
rows

affected (0.00 sec)

mysql> change master
to

-> master_host=
'192.168.8.57'
,

-> master_port=3306,

-> master_user=
'repl'
,

-> master_password=
'mysql'
,

-> master_auto_position=1;

Query OK, 0
rows

affected, 2 warnings (0.05 sec)

mysql> start slave ;

Query OK, 0
rows

affected (0.00 sec)

mysql> show slave status \G

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

Slave_IO_State: Waiting
for

master
to

send event

Master_Host: 192.168.8.57

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000021

Read_Master_Log_Pos: 194

Relay_Log_File: slave1-relay-bin.000002

Relay_Log_Pos: 367

Relay_Master_Log_File: mysql-bin.000021

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: 194

Relay_Log_Space: 615

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: 57

Master_UUID: a92f70a4-d5ea-11e8-af28-080027c0450d

Master_Info_File: /mysql/data/master.info

SQL_Delay: 0

SQL_Remaining_Delay:
NULL

Slave_SQL_Running_State: Slave 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: a92f70a4-d5ea-11e8-af28-080027c0450d:1-13,

a92f70a4-d5ea-11e8-af28-080027c0450f:1-8

Auto_Position: 1

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

1 row
in

set

(0.00 sec)

192.168.8.59

mysql> stop slave;

Query OK, 0
rows

affected (0.01 sec)

mysql> reset slave;

Query OK, 0
rows

affected (0.10 sec)

mysql> change master
to

-> master_host=
'192.168.8.57'
,

-> master_port=3306,

-> master_user=
'repl'
,

-> master_password=
'mysql'
,

-> master_auto_position=1;

Query OK, 0
rows

affected, 2 warnings (0.05 sec)

mysql> start slave;

Query OK, 0
rows

affected (0.01 sec)

mysql>
set

global

read_only=1;

Query OK, 0
rows

affected (0.00 sec)

mysql> show slave status \G

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

Slave_IO_State: Waiting
for

master
to

send event

Master_Host: 192.168.8.57

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000021

Read_Master_Log_Pos: 194

Relay_Log_File: slave2-relay-bin.000002

Relay_Log_Pos: 367

Relay_Master_Log_File: mysql-bin.000021

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: 194

Relay_Log_Space: 575

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: 57

Master_UUID: a92f70a4-d5ea-11e8-af28-080027c0450d

Master_Info_File: /mysql/data/master.info

SQL_Delay: 0

SQL_Remaining_Delay:
NULL

Slave_SQL_Running_State: Slave 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: a92f70a4-d5ea-11e8-af28-080027c0450b:1-4,

a92f70a4-d5ea-11e8-af28-080027c0450d:1-13,

a92f70a4-d5ea-11e8-af28-080027c0450f:1-8

Auto_Position: 1

Replicate_Rewrite_DB:

Channel_Name:

Master_TLS_Version:

1 row
in

set

(0.00 sec)

2.重启192.168.8.57和192.168.8.58上边keepalived进程，使VIP飘至192.168.8.57。

3.重启MHA manager进程并观察复制情况。

MySQL5.7+MHA+Keepalived failover自动切换

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