[root@wallet01 ~]# vi /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.201 wallet01
192.168.1.202 wallet02
192.168.1.203 wallet03
192.168.1.204 wallet04
[root@wallet01 ~]# scp /etc/hosts 192.168.1.202:/etc
[root@wallet01 ~]# scp /etc/hosts 192.168.1.203:/etc
[root@wallet01 ~]# scp /etc/hosts 192.168.1.204:/etc
[root@wallet01 ~]# /sbin/ifconfig eth0:1 192.168.1.200/24
[root@wallet01 ~]# mysql -uroot -pabcd.1234
mysql> grant all on *.* to 'mha'@'%' identified by 'mha';
Query OK, 0 rows affected (0.04 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.14 sec)
mysql> show master status;
+------------------+-----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+-----------+--------------+------------------+-------------------+
| mysql-bin.000245 | 104390591 | | | |
+------------------+-----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
[root@wallet02 ~]# mysql -uroot -pabcd.1234
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.201
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000245
Read_Master_Log_Pos: 104399339
Relay_Log_File: relay-bin.000004
Relay_Log_Pos: 14828467
Relay_Master_Log_File: mysql-bin.000245
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
[root@wallet03 ~]# mysql -uroot -pabcd.1234
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.201
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000245
Read_Master_Log_Pos: 104410355
Relay_Log_File: relay-bin.000004
Relay_Log_Pos: 14834299
Relay_Master_Log_File: mysql-bin.000245
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
[root@wallet01 ~]# vi /etc/my.cnf
[mysqld]
relay_log_purge = 0
[root@wallet02 ~]# vi /etc/my.cnf
[mysqld]
relay_log_purge = 0
read_only = 1
[root@wallet03 ~]# vi /etc/my.cnf
[mysqld]
relay_log_purge = 0
read_only = 1
[root@wallet01 ~]# ssh-keygen
[root@wallet01 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet02
[root@wallet01 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet03
[root@wallet01 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet04
[root@wallet02 ~]# ssh-keygen
[root@wallet02 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet01
[root@wallet02 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet03
[root@wallet02 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet04
[root@wallet03 ~]# ssh-keygen
[root@wallet03 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet01
[root@wallet03 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet02
[root@wallet03 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet04
[root@wallet04 ~]# ssh-keygen
[root@wallet04 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet01
[root@wallet04 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet02
[root@wallet04 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@wallet03
[root@wallet01 ~]# ln -s /usr/local/mysql/bin/mysql /usr/local/bin/mysql
[root@wallet01 ~]# ln -s /usr/local/mysql/bin/mysqlbinlog /usr/local/bin/mysqlbinlog
[root@wallet02 ~]# ln -s /usr/local/mysql/bin/mysql /usr/local/bin/mysql
[root@wallet02 ~]# ln -s /usr/local/mysql/bin/mysqlbinlog /usr/local/bin/mysqlbinlog
[root@wallet03 ~]# ln -s /usr/local/mysql/bin/mysql /usr/local/bin/mysql
[root@wallet03 ~]# ln -s /usr/local/mysql/bin/mysqlbinlog /usr/local/bin/mysqlbinlog
[root@wallet04 ~]# ln -s /usr/local/mysql/bin/mysql /usr/local/bin/mysql
[root@wallet04 ~]# ln -s /usr/local/mysql/bin/mysqlbinlog /usr/local/bin/mysqlbinlog
[root@wallet01 ~]# yum install -y perl-DBD-MySQL perl-CPAN perl-Config-Tiny perl-Log-Dispatch perl-Time-HiRes perl-Parallel-ForkManager
[root@wallet01 ~]# tar zxvf mha4mysql-node-0.56.tar.gz
[root@wallet01 ~]# cd mha4mysql-node-0.56
[root@wallet01 mha4mysql-node-0.56]# perl Makefile
[root@wallet01 mha4mysql-node-0.56]# make && make install
[root@wallet02 ~]# yum install -y perl-DBD-MySQL perl-CPAN perl-Config-Tiny perl-Log-Dispatch perl-Time-HiRes perl-Parallel-ForkManager
[root@wallet02 ~]# tar zxvf mha4mysql-node-0.56.tar.gz
[root@wallet02 ~]# cd mha4mysql-node-0.56
[root@wallet02 mha4mysql-node-0.56]# perl Makefile
[root@wallet02 mha4mysql-node-0.56]# make && make install
[root@wallet03 ~]# yum install -y perl-DBD-MySQL perl-CPAN perl-Config-Tiny perl-Log-Dispatch perl-Time-HiRes perl-Parallel-ForkManager
[root@wallet03 ~]# tar zxvf mha4mysql-node-0.56.tar.gz
[root@wallet03 ~]# cd mha4mysql-node-0.56
[root@wallet03 mha4mysql-node-0.56]# perl Makefile
[root@wallet03 mha4mysql-node-0.56]# make && make install
[root@wallet04 ~]# yum install -y perl-DBD-MySQL perl-CPAN perl-Config-Tiny perl-Log-Dispatch perl-Time-HiRes perl-Parallel-ForkManager
[root@wallet04 ~]# tar zxvf mha4mysql-node-0.56.tar.gz
[root@wallet04 ~]# cd mha4mysql-node-0.56
[root@wallet04 mha4mysql-node-0.56]# perl Makefile
[root@wallet04 mha4mysql-node-0.56]# make && make install
[root@wallet04 ~]# tar zxvf mha4mysql-manager-0.56.tar.gz
[root@wallet04 ~]# cd mha4mysql-manager-0.56
[root@wallet04 mha4mysql-manager-0.56]# perl Makefile.PL
[root@wallet04 mha4mysql-manager-0.56]# make && make install
[root@wallet04 mha4mysql-manager-0.56]# cp samples/scripts/* /usr/local/bin
[root@wallet04 ~]# mkdir -p /usr/local/mha
[root@wallet04 ~]# mkdir -p /etc/mha
[root@wallet04 ~]# vim /etc/mha/mha.conf
[server default]
user=mha
password=mha
repl_user=repl
repl_password=repl
ssh_user=root
ping_interval=1
ping_type=CONNECT
manager_workdir=/usr/local/mha
manager_log=/usr/local/mha/manager.log
master_ip_failover_script=/usr/local/bin/master_ip_failover
master_ip_online_change_script=/usr/local/bin/master_ip_online_change
[server1]
hostname=wallet01
ip=192.168.1.201
ssh_port=22
master_binlog_dir=/usr/local/mysql/data
candidate_master=1
port=3306
[server2]
hostname=wallet02
ip=192.168.1.202
ssh_port=22
master_binlog_dir=/usr/local/mysql/data
candidate_master=1
port=3306
[server3]
hostname=wallet03
ip=192.168.1.203
ssh_port=22
master_binlog_dir=/usr/local/mysql/data
candidate_master=1
port=3306
[root@wallet04 ~]# vi /usr/local/bin/master_ip_failover
#!/usr/bin/env perl
# Copyright (C) 2011 DeNA Co.,Ltd.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# 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;
my (
$command, $ssh_user, $orig_master_host, $orig_master_ip,
$orig_master_port, $new_master_host, $new_master_ip, $new_master_port
);
my $vip = '192.168.1.200/24'; # Virtual IP
my $gateway = '192.168.1.1'; #Gateway IP
my $interface = 'eth0';
my $key = "1";
my $ssh_start_vip =
"/sbin/ifconfig $interface:$key $vip;/sbin/arping -I $interface -c 3 -s $vip $gateway >/dev/null 2>&1";
my $ssh_stop_vip = "/sbin/ifconfig $interface:$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,
);
exit &main();
sub main {
print "\n\nIN SCRIPT TEST====$ssh_stop_vip==$ssh_start_vip===\n\n";
if ( $command eq "stop" || $command eq "stopssh" ) {
# $orig_master_host, $orig_master_ip, $orig_master_port are passed.
# If you manage master ip address at global catalog database,
# invalidate orig_master_ip here.
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" ) {
# all arguments are passed.
# If you manage master ip address at global catalog database,
# activate new_master_ip here.
# You can also grant write access (create user, set read_only=0, etc) here.
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";
`ssh $ssh_user\@$orig_master_host \" $ssh_start_vip \"`;
exit 0;
}
else {
&usage();
exit 1;
}
}
# A simple system call that enable the VIP on the new master
sub start_vip() {
`ssh $ssh_user\@$new_master_host \" $ssh_start_vip \"`;
}
# A simple system call that disable the VIP on the old_master
sub stop_vip() {
`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";
}
[root@wallet04 ~]# /usr/local/bin/masterha_check_ssh --conf=/etc/mha/mha.conf
Wed Feb 20 15:45:05 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Wed Feb 20 15:45:05 2019 - [info] Reading application default configuration from /etc/mha/mha.conf..
Wed Feb 20 15:45:05 2019 - [info] Reading server configuration from /etc/mha/mha.conf..
Wed Feb 20 15:45:05 2019 - [info] Starting SSH connection tests..
Wed Feb 20 15:45:05 2019 - [debug]
Wed Feb 20 15:45:05 2019 - [debug] Connecting via SSH from root@wallet01(192.168.1.201:22) to root@wallet02(192.168.1.202:22)..
Wed Feb 20 15:45:05 2019 - [debug] ok.
Wed Feb 20 15:45:05 2019 - [debug] Connecting via SSH from root@wallet01(192.168.1.201:22) to root@wallet03(192.168.1.203:22)..
Wed Feb 20 15:45:05 2019 - [debug] ok.
Wed Feb 20 15:45:06 2019 - [debug]
Wed Feb 20 15:45:05 2019 - [debug] Connecting via SSH from root@wallet02(192.168.1.202:22) to root@wallet01(192.168.1.201:22)..
Wed Feb 20 15:45:05 2019 - [debug] ok.
Wed Feb 20 15:45:05 2019 - [debug] Connecting via SSH from root@wallet02(192.168.1.202:22) to root@wallet03(192.168.1.203:22)..
Wed Feb 20 15:45:05 2019 - [debug] ok.
Wed Feb 20 15:45:06 2019 - [debug]
Wed Feb 20 15:45:06 2019 - [debug] Connecting via SSH from root@wallet03(192.168.1.203:22) to root@wallet01(192.168.1.201:22)..
Wed Feb 20 15:45:06 2019 - [debug] ok.
Wed Feb 20 15:45:06 2019 - [debug] Connecting via SSH from root@wallet03(192.168.1.203:22) to root@wallet02(192.168.1.202:22)..
Wed Feb 20 15:45:06 2019 - [debug] ok.
Wed Feb 20 15:45:06 2019 - [info] All SSH connection tests passed successfully.
[root@wallet04 ~]# /usr/local/bin/masterha_check_repl --conf=/etc/mha/mha.conf
Wed Feb 20 15:45:22 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Wed Feb 20 15:45:22 2019 - [info] Reading application default configuration from /etc/mha/mha.conf..
Wed Feb 20 15:45:22 2019 - [info] Reading server configuration from /etc/mha/mha.conf..
Wed Feb 20 15:45:22 2019 - [info] MHA::MasterMonitor version 0.56.
Wed Feb 20 15:45:23 2019 - [info] GTID failover mode = 0
Wed Feb 20 15:45:23 2019 - [info] Dead Servers:
Wed Feb 20 15:45:23 2019 - [info] Alive Servers:
Wed Feb 20 15:45:23 2019 - [info] wallet01(192.168.1.201:3306)
Wed Feb 20 15:45:23 2019 - [info] wallet02(192.168.1.202:3306)
Wed Feb 20 15:45:23 2019 - [info] wallet03(192.168.1.203:3306)
Wed Feb 20 15:45:23 2019 - [info] Alive Slaves:
Wed Feb 20 15:45:23 2019 - [info] wallet02(192.168.1.202:3306) Version=5.6.43-log (oldest major version between slaves) log-bin:enabled
Wed Feb 20 15:45:23 2019 - [info] Replicating from 192.168.1.201(192.168.1.201:3306)
Wed Feb 20 15:45:23 2019 - [info] Primary candidate for the new Master (candidate_master is set)
Wed Feb 20 15:45:23 2019 - [info] wallet03(192.168.1.203:3306) Version=5.6.43-log (oldest major version between slaves) log-bin:enabled
Wed Feb 20 15:45:23 2019 - [info] Replicating from 192.168.1.201(192.168.1.201:3306)
Wed Feb 20 15:45:23 2019 - [info] Primary candidate for the new Master (candidate_master is set)
Wed Feb 20 15:45:23 2019 - [info] Current Alive Master: wallet01(192.168.1.201:3306)
Wed Feb 20 15:45:23 2019 - [info] Checking slave configurations..
Wed Feb 20 15:45:23 2019 - [info] Checking replication filtering settings..
Wed Feb 20 15:45:23 2019 - [info] binlog_do_db= , binlog_ignore_db=
Wed Feb 20 15:45:23 2019 - [info] Replication filtering check ok.
Wed Feb 20 15:45:23 2019 - [info] GTID (with auto-pos) is not supported
Wed Feb 20 15:45:23 2019 - [info] Starting SSH connection tests..
Wed Feb 20 15:45:24 2019 - [info] All SSH connection tests passed successfully.
Wed Feb 20 15:45:24 2019 - [info] Checking MHA Node version..
Wed Feb 20 15:45:24 2019 - [info] Version check ok.
Wed Feb 20 15:45:24 2019 - [info] Checking SSH publickey authentication settings on the current master..
Wed Feb 20 15:45:25 2019 - [info] HealthCheck: SSH to wallet01 is reachable.
Wed Feb 20 15:45:25 2019 - [info] Master MHA Node version is 0.56.
Wed Feb 20 15:45:25 2019 - [info] Checking recovery script configurations on wallet01(192.168.1.201:3306)..
Wed Feb 20 15:45:25 2019 - [info] Executing command: save_binary_logs --command=test --start_pos=4 --binlog_dir=/usr/local/mysql/data --output_file=/var/tmp/save_binary_logs_test --manager_version=0.56 --start_file=mysql-bin.000245
Wed Feb 20 15:45:25 2019 - [info] Connecting to [email protected](wallet01:22)..
Creating /var/tmp if not exists.. ok.
Checking output directory is accessible or not..
ok.
Binlog found at /usr/local/mysql/data, up to mysql-bin.000245
Wed Feb 20 15:45:25 2019 - [info] Binlog setting check done.
Wed Feb 20 15:45:25 2019 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers..
Wed Feb 20 15:45:25 2019 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='mha' --slave_host=wallet02 --slave_ip=192.168.1.202 --slave_port=3306 --workdir=/var/tmp --target_version=5.6.43-log --manager_version=0.56 --relay_dir=/usr/local/mysql/data --current_relay_log=relay-bin.000004 --slave_pass=xxx
Wed Feb 20 15:45:25 2019 - [info] Connecting to [email protected](wallet02:22)..
Checking slave recovery environment settings..
Relay log found at /usr/local/mysql/data, up to relay-bin.000004
Temporary relay log file is /usr/local/mysql/data/relay-bin.000004
Testing mysql connection and privileges..Warning: Using a password on the command line interface can be insecure.
done.
Testing mysqlbinlog output.. done.
Cleaning up test file(s).. done.
Wed Feb 20 15:45:25 2019 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='mha' --slave_host=wallet03 --slave_ip=192.168.1.203 --slave_port=3306 --workdir=/var/tmp --target_version=5.6.43-log --manager_version=0.56 --relay_dir=/usr/local/mysql/data --current_relay_log=relay-bin.000004 --slave_pass=xxx
Wed Feb 20 15:45:25 2019 - [info] Connecting to [email protected](wallet03:22)..
Checking slave recovery environment settings..
Relay log found at /usr/local/mysql/data, up to relay-bin.000004
Temporary relay log file is /usr/local/mysql/data/relay-bin.000004
Testing mysql connection and privileges..Warning: Using a password on the command line interface can be insecure.
done.
Testing mysqlbinlog output.. done.
Cleaning up test file(s).. done.
Wed Feb 20 15:45:26 2019 - [info] Slaves settings check done.
Wed Feb 20 15:45:26 2019 - [info]
wallet01(192.168.1.201:3306) (current master)
+--wallet02(192.168.1.202:3306)
+--wallet03(192.168.1.203:3306)
Wed Feb 20 15:45:26 2019 - [info] Checking replication health on wallet02..
Wed Feb 20 15:45:26 2019 - [info] ok.
Wed Feb 20 15:45:26 2019 - [info] Checking replication health on wallet03..
Wed Feb 20 15:45:26 2019 - [info] ok.
Wed Feb 20 15:45:26 2019 - [info] Checking master_ip_failover_script status:
Wed Feb 20 15:45:26 2019 - [info] /usr/local/bin/master_ip_failover --command=status --ssh_user=root --orig_master_host=wallet01 --orig_master_ip=192.168.1.201 --orig_master_port=3306
IN SCRIPT TEST====/sbin/ifconfig eth0:1 down==/sbin/ifconfig eth0:1 192.168.1.200/24;/sbin/arping -I eth0 -c 3 -s 192.168.1.200/24 192.168.1.1 >/dev/null 2>&1===
Checking the Status of the script.. OK
Wed Feb 20 15:45:26 2019 - [info] OK.
Wed Feb 20 15:45:26 2019 - [warning] shutdown_script is not defined.
Wed Feb 20 15:45:26 2019 - [info] Got exit code 0 (Not master dead).
MySQL Replication Health is OK.
[root@wallet04 ~]# nohup /usr/local/bin/masterha_manager --conf=/etc/mha/mha.conf > /var/log/masterhamanager.log < /dev/null 2>&1 &
[root@wallet04 ~]# /usr/local/bin/masterha_check_status --conf=/etc/mha/mha.conf
mha (pid:14002) is running(0:PING_OK), master:wallet01
[root@wallet04 ~]# cat /var/log/masterhamanager.log
Wed Feb 20 17:06:54 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Wed Feb 20 17:06:54 2019 - [info] Reading application default configuration from /etc/mha/mha.conf..
Wed Feb 20 17:06:54 2019 - [info] Reading server configuration from /etc/mha/mha.conf..
關閉wallet01之前：
wallet01：master
wallet02：wallet01的第一個slave
wallet03：wallet01的第二個slave
[root@wallet01 ~]# ip addr
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:46:e9:d6 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.201/24 brd 192.168.1.255 scope global eth0
inet 192.168.1.200/24 brd 192.168.1.255 scope global secondary eth0:1
關閉wallet01之後：
wallet02被提升爲新的master
wallet03成爲wallet02的第一個slave
[root@wallet01 ~]# service mysqld stop
Shutting down MySQL..... [ OK ]
[root@wallet01 ~]# ip addr
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:46:e9:d6 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.201/24 brd 192.168.1.255 scope global eth0
[root@wallet02 ~]# ip addr
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:7b:14:12 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.202/24 brd 192.168.1.255 scope global eth0
inet 192.168.1.200/24 brd 192.168.1.255 scope global secondary eth0:1
[root@wallet02 ~]# mysql -uroot -pabcd.1234
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000005 | 120 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
[root@wallet03 ~]# mysql -uroot -pabcd.1234
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.202
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000005
Read_Master_Log_Pos: 120
Relay_Log_File: relay-bin.000002
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000005
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
恢復wallet01之後：
wallet02：master
wallet03：wallet02的第一個slave
wallet01：wallet02的第二個slave
[root@wallet04 ~]# grep -i 'change' /usr/local/mha/manager.log
Tue Mar 13 15:34:53 2018 - [info] All other slaves should start replication from here. Statement should be: CHANGE MASTER TO MASTER_HOST='amb02 or 192.168.1.202', MASTER_PORT=3306, MASTER_LOG_FILE='mysql-bin.000005', MASTER_LOG_POS=120, MASTER_USER='repl', MASTER_PASSWORD='xxx';
Tue Mar 13 15:34:53 2018 - [info] Executed CHANGE MASTER.
[root@wallet04 ~]# cd /usr/local/mha/
[root@wallet04 mha]# rm -rf mha.failover.complete
[root@wallet01 ~]# service mysqld start
Starting MySQL. [ OK ]
[root@wallet01 ~]# mysql -uroot -pabcd.1234
mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> reset slave all;
Query OK, 0 rows affected (0.00 sec)
mysql> CHANGE MASTER TO MASTER_HOST='192.168.1.202', MASTER_PORT=3306, MASTER_LOG_FILE='mysql-bin.000005', MASTER_LOG_POS=120, MASTER_USER='repl', MASTER_PASSWORD='repl';
Query OK, 0 rows affected, 2 warnings (0.06 sec)
mysql> start slave;
Query OK, 0 rows affected (0.05 sec)
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.202
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000005
Read_Master_Log_Pos: 120
Relay_Log_File: relay-bin.000002
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000005
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
[root@wallet04 ~]# /usr/local/bin/masterha_check_ssh --conf=/etc/mha/mha.conf
[root@wallet04 ~]# /usr/local/bin/masterha_check_repl --conf=/etc/mha/mha.conf
[root@wallet04 ~]# nohup /usr/local/bin/masterha_manager --conf=/etc/mha/mha.conf > /var/log/masterhamanager.log < /dev/null 2>&1 &
[root@wallet04 ~]# /usr/local/bin/masterha_check_status --conf=/etc/mha/mha.conf
mha (pid:1921) is running(0:PING_OK), master:192.168.1.202
