MYSQL高可用架构之MHA
本篇博客内容写的有点赘余，
读者可以参考https://blog.csdn.net/aaaaaab_/article/details/81583657
实验环境的搭建：
准备： 在主从复制(GTID)的基础上面去做一主两从,必须保证一主二从可以实时
同步数据。
主从复制可以参考
https://blog.csdn.net/aaaaaab_/article/details/81515111
server1：172.25.38.1（master）
server2：172.25.38.2（slave）
server3：172.25.38.3（slave）
server4：172.25.38.4（mha）在server1:
[root@server1 MHA]# ls
master_ip_failover
master_ip_online_change
mha4mysql-manager-0.56-0.el6.noarch.rpm
mha4mysql-node-0.56-0.el6.noarch.rpm
perl-Config-Tiny-2.12-7.1.el6.noarch.rpm
perl-Email-Date-Format-1.002-5.el6.noarch.rpm
perl-Log-Dispatch-2.27-1.el6.noarch.rpm
perl-Mail-Sender-0.8.16-3.el6.noarch.rpm
perl-Mail-Sendmail-0.79-12.el6.noarch.rpm
perl-MIME-Lite-3.027-2.el6.noarch.rpm
perl-MIME-Types-1.28-2.el6.noarch.rpm
perl-Parallel-ForkManager-0.7.9-1.el6.noarch.rpm
send_report
[root@server1 MHA]# yum install mha4mysql-node-0.56-0.el6.noarch.rpm -y
[root@server1 .ssh]# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
/root/.ssh/id_rsa already exists.
Overwrite (y/n)? y
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:
72:c7:15:ad:e4:17:bb:b0:a3:0f:15:48:d8:45:f0:4d root@server1
The key's randomart image is:
+--[ RSA 2048]----+
| oo++.E |
| ...o.+o |
| .o+..o |
| . .+.o |
| . S o .+ . |
| o . .o . |
| .. . |
| .. |
| .. |
+-----------------+
[root@server1 .ssh]# ls
id_rsa id_rsa.pub known_hosts
[root@server1 .ssh]# ssh-copy-id [email protected]
root@172.25.38.3's password:
Now try logging into the machine, with "ssh '[email protected]'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
[root@server1 .ssh]# ssh-copy-id [email protected]
Now try logging into the machine, with "ssh '[email protected]'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
在server2:
[root@server2 MHA]# ls
master_ip_failover
master_ip_online_change
mha4mysql-manager-0.56-0.el6.noarch.rpm
mha4mysql-node-0.56-0.el6.noarch.rpm
perl-Config-Tiny-2.12-7.1.el6.noarch.rpm
perl-Email-Date-Format-1.002-5.el6.noarch.rpm
perl-Log-Dispatch-2.27-1.el6.noarch.rpm
perl-Mail-Sender-0.8.16-3.el6.noarch.rpm
perl-Mail-Sendmail-0.79-12.el6.noarch.rpm
perl-MIME-Lite-3.027-2.el6.noarch.rpm
perl-MIME-Types-1.28-2.el6.noarch.rpm
perl-Parallel-ForkManager-0.7.9-1.el6.noarch.rpm
send_report
[root@server2 MHA]# yum install mha4mysql-node-0.56-0.el6.noarch.rpm -y
[root@server2 MHA]# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
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:
f9:df:dc:8e:9f:b1:69:50:77:88:a8:63:3b:f0:da:7f root@server2
The key's randomart image is:
+--[ RSA 2048]----+
| |
| |
| . . . |
| .. . ..o|
| S. . o|
| . +. . |
| + o. .. |
| .+ .Eo +=|
| ...o... =*+|
+-----------------+
[root@server2 MHA]# ssh-copy-id 172.25.38.1
[root@server2 MHA]# ssh-copy-id 172.25.38.3
[root@server2 MHA]# mysql -p
mysql> grant replication slave on *.* to yiyi@'172.25.38.%' identified by 'YIYI=bushe24';
Query OK, 0 rows affected, 1 warning (0.00 sec)
在server3重新配置slave数据库的初始化：
[root@server3 ~]# ls
MHA
[root@server3 ~]# cd MHA/
[root@server3 MHA]# ls
master_ip_failover
master_ip_online_change
mha4mysql-manager-0.56-0.el6.noarch.rpm
mha4mysql-node-0.56-0.el6.noarch.rpm
perl-Config-Tiny-2.12-7.1.el6.noarch.rpm
perl-Email-Date-Format-1.002-5.el6.noarch.rpm
perl-Log-Dispatch-2.27-1.el6.noarch.rpm
perl-Mail-Sender-0.8.16-3.el6.noarch.rpm
perl-Mail-Sendmail-0.79-12.el6.noarch.rpm
perl-MIME-Lite-3.027-2.el6.noarch.rpm
perl-MIME-Types-1.28-2.el6.noarch.rpm
perl-Parallel-ForkManager-0.7.9-1.el6.noarch.rpm
send_report
[root@server3 MHA]# yum install mha4mysql-node-0.56-0.el6.noarch.rpm -y
[root@server3 ~]# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
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:
2b:8b:36:e7:dc:aa:b0:65:10:13:9b:62:b4:16:c2:3f root@server3
The key's randomart image is:
+--[ RSA 2048]----+
|oo. |
|o.o+ |
|.+* |
|o. E |
| . . S |
| . . |
| . o . . |
| =oo.+ |
| ..o==.. |
+-----------------+
[root@server3 ~]# ssh-copy-id 172.25.38.1
[root@server3 ~]# ssh-copy-id 172.25.38.2
mysql> grant replication slave on *.* to yiyi@'172.25.38.%' identified by 'YIYI=bushe24';
Query OK, 0 rows affected, 1 warning (0.00 sec)
在server4（mha主机）：
[root@server4 ~]# ls
MHA
[root@server4 ~]# cd MHA/
[root@server4 MHA]# ls
master_ip_failover
master_ip_online_change
mha4mysql-manager-0.56-0.el6.noarch.rpm
mha4mysql-node-0.56-0.el6.noarch.rpm
perl-Config-Tiny-2.12-7.1.el6.noarch.rpm
perl-Email-Date-Format-1.002-5.el6.noarch.rpm
perl-Log-Dispatch-2.27-1.el6.noarch.rpm
perl-Mail-Sender-0.8.16-3.el6.noarch.rpm
perl-Mail-Sendmail-0.79-12.el6.noarch.rpm
perl-MIME-Lite-3.027-2.el6.noarch.rpm
perl-MIME-Types-1.28-2.el6.noarch.rpm
perl-Parallel-ForkManager-0.7.9-1.el6.noarch.rpm
send_report
[root@server4 MHA]# yum install * -y
mkdir /etc/mha ##创建工作目录workdir
mkdir /etc/mha ##创建配置文件所在目录
cd /etc/mha/
vim app.conf
[root@server4 mha]# cat app.conf
[server default]
manager_workdir=/usr/local/bingrep master_ip_failover /etc/masterha/app1.cnf
manager_log=/usr/local/bin/mha.log
master_binlog_dir=/var/lib/mysql
#master_ip_failover_script=/usr/local/bin/master_ip_failover
master_ip_online_change_script=/usr/local/bin/master_ip_online_change
user=root
password=Aa@+123456
ping_interval=1
remote_workdir=/tmp
repl_user=yiyi
repl_password=YIYI+bushe24
report_script=/usr/local/send_report
#secondary_check_script=/usr/local/bin/masterha_secondary_check -s server03 -s server02
#shutdown_script=""
ssh_user=root
[server1]
hostname=172.25.38.1
port=3306
[server2]
hostname=172.25.38.2
port=3306
candidate_master=1
check_repl_delay=0
[server3]
hostname=172.25.38.3
port=3306
#no_master=1
[root@server4 mha]# masterha_check_ssh --conf=/etc/mha/app.conf
Thu Aug 9 15:40:10 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Thu Aug 9 15:40:10 2018 - [info] Reading application default configuration from /etc/mha/app.conf..
Thu Aug 9 15:40:10 2018 - [info] Reading server configuration from /etc/mha/app.conf..
Thu Aug 9 15:40:10 2018 - [info] Starting SSH connection tests..
Thu Aug 9 15:40:11 2018 - [debug]
Thu Aug 9 15:40:10 2018 - [debug] Connecting via SSH from root@172.25.38.1(172.25.38.1:22) to root@172.25.38.2(172.25.38.2:22)..
Thu Aug 9 15:40:11 2018 - [debug] ok.
Thu Aug 9 15:40:11 2018 - [debug] Connecting via SSH from root@172.25.38.1(172.25.38.1:22) to root@172.25.38.3(172.25.38.3:22)..
Thu Aug 9 15:40:11 2018 - [debug] ok.
Thu Aug 9 15:40:12 2018 - [debug]
Thu Aug 9 15:40:11 2018 - [debug] Connecting via SSH from root@172.25.38.2(172.25.38.2:22) to root@172.25.38.1(172.25.38.1:22)..
Thu Aug 9 15:40:11 2018 - [debug] ok.
Thu Aug 9 15:40:11 2018 - [debug] Connecting via SSH from root@172.25.38.2(172.25.38.2:22) to root@172.25.38.3(172.25.38.3:22)..
Thu Aug 9 15:40:12 2018 - [debug] ok.
Thu Aug 9 15:40:12 2018 - [debug]
Thu Aug 9 15:40:11 2018 - [debug] Connecting via SSH from root@172.25.38.3(172.25.38.3:22) to root@172.25.38.1(172.25.38.1:22)..
Thu Aug 9 15:40:12 2018 - [debug] ok.
Thu Aug 9 15:40:12 2018 - [debug] Connecting via SSH from root@172.25.38.3(172.25.38.3:22) to root@172.25.38.2(172.25.38.2:22)..
Thu Aug 9 15:40:12 2018 - [debug] ok.
Thu Aug 9 15:40:12 2018 - [info] All SSH connection tests passed successfully
通过脚本检测状态：
[root@server4 mha]# touch /usr/local/bin/master_ip_failover
[root@server4 mha]# cd /usr/local/bin/
[root@server4 bin]# touch /usr/local/bin/master_ip_online_change
[root@server4 bin]# vim master_ip_failover
[root@server4 bin]# vim master_ip_online_change
[root@server4 bin]# chmod +x master_ip_failover
[root@server4 bin]# chmod +x master_ip_online_change 
保证三台虚拟机的/etc/my.cnf一致server-id区分即可，在每个虚拟机重启服务即可
[root@server1 ~]# scp /etc/my.cnf server2:/etc/my.cnf
The authenticity of host 'server2 (172.25.38.2)' can't be established.
RSA key fingerprint is 2f:cc:a7:97:6a:d8:41:5b:90:f3:91:b6:e8:87:4c:b3.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'server2' (RSA) to the list of known hosts.
my.cnf 100% 1034 1.0KB/s 00:00
[root@server1 ~]# scp /etc/my.cnf server3:/etc/my.cnf
my.cnf 100% 1034 1.0KB/s 00:00 
开启MHA Manager监控
[root@server4 bin]# masterha_check_repl --conf=/etc/mha/app.conf
Thu Aug 9 23:48:32 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Thu Aug 9 23:48:32 2018 - [info] Reading application default configuration from /etc/mha/app.conf..
Thu Aug 9 23:48:32 2018 - [info] Reading server configuration from /etc/mha/app.conf..
Thu Aug 9 23:48:32 2018 - [info] MHA::MasterMonitor version 0.56.
Thu Aug 9 23:48:32 2018 - [info] GTID failover mode = 1
Thu Aug 9 23:48:32 2018 - [info] Dead Servers:
Thu Aug 9 23:48:32 2018 - [info] Alive Servers:
Thu Aug 9 23:48:32 2018 - [info] 172.25.254.1(172.25.254.1:3306)
Thu Aug 9 23:48:32 2018 - [info] 172.25.254.2(172.25.254.2:3306)
Thu Aug 9 23:48:32 2018 - [info] 172.25.254.3(172.25.254.3:3306)
Thu Aug 9 23:48:32 2018 - [info] Alive Slaves:
Thu Aug 9 23:48:32 2018 - [info] 172.25.254.2(172.25.254.2:3306) Version=5.7.17-log (oldest major version between slaves) log-bin:enabled
Thu Aug 9 23:48:32 2018 - [info] GTID ON
Thu Aug 9 23:48:32 2018 - [info] Replicating from 172.25.254.1(172.25.254.1:3306)
Thu Aug 9 23:48:32 2018 - [info] Primary candidate for the new Master (candidate_master is set)
Thu Aug 9 23:48:32 2018 - [info] 172.25.254.3(172.25.254.3:3306) Version=5.7.17-log (oldest major version between slaves) log-bin:enabled
Thu Aug 9 23:48:32 2018 - [info] GTID ON
Thu Aug 9 23:48:32 2018 - [info] Replicating from 172.25.254.1(172.25.254.1:3306)
Thu Aug 9 23:48:32 2018 - [info] Current Alive Master: 172.25.254.1(172.25.254.1:3306)
Thu Aug 9 23:48:32 2018 - [info] Checking slave configurations..
Thu Aug 9 23:48:32 2018 - [info] read_only=1 is not set on slave 172.25.254.2(172.25.254.2:3306).
Thu Aug 9 23:48:32 2018 - [info] read_only=1 is not set on slave 172.25.254.3(172.25.254.3:3306).
Thu Aug 9 23:48:32 2018 - [info] Checking replication filtering settings..
Thu Aug 9 23:48:32 2018 - [info] binlog_do_db= , binlog_ignore_db=
Thu Aug 9 23:48:32 2018 - [info] Replication filtering check ok.
Thu Aug 9 23:48:32 2018 - [info] GTID (with auto-pos) is supported. Skipping all SSH and Node package checking.
Thu Aug 9 23:48:32 2018 - [info] Checking SSH publickey authentication settings on the current master..
Thu Aug 9 23:48:32 2018 - [info] HealthCheck: SSH to 172.25.254.1 is reachable.
Thu Aug 9 23:48:32 2018 - [info]
172.25.254.1(172.25.254.1:3306) (current master)
+--172.25.254.2(172.25.254.2:3306)
+--172.25.254.3(172.25.254.3:3306)
Thu Aug 9 23:48:32 2018 - [info] Checking replication health on 172.25.254.2..
Thu Aug 9 23:48:32 2018 - [info] ok.
Thu Aug 9 23:48:32 2018 - [info] Checking replication health on 172.25.254.3..
Thu Aug 9 23:48:32 2018 - [info] ok.
Thu Aug 9 23:48:32 2018 - [warning] master_ip_failover_script is not defined.
Thu Aug 9 23:48:32 2018 - [warning] shutdown_script is not defined.
Thu Aug 9 23:48:32 2018 - [info] Got exit code 0 (Not master dead).
MySQL Replication Health is OK.
[root@server4 bin]# cat /etc/mha/app.conf
[server default]
manager_workdir=/etc/mha
manager_log=/usr/local/bin/mha.log
master_binlog_dir=/var/lib/mysql
#master_ip_failover_script=/usr/local/bin/master_ip_failover
master_ip_online_change_script=/usr/local/bin/master_ip_online_change
user=root
password=Aa@+123456
ping_interval=1
remote_workdir=/tmp
repl_user=repl
repl_password=Yakexi+007
report_script=/usr/local/send_report
#secondary_check_script=/usr/local/bin/masterha_secondary_check -s server03 -s server02
#shutdown_script=""
ssh_user=root
[server1]
hostname=172.25.254.1
port=3306
[server2]
hostname=172.25.254.2
port=3306
candidate_master=1
check_repl_delay=0
[server3]
hostname=172.25.254.3
port=3306
#no_master=1
通过master_check_status脚本查看Manager的状态
[root@server4 bin]# masterha_check_status --conf=/etc/mha/app.conf
app is stopped(2:NOT_RUNNING).
解决报错打开监控即可
[root@server4 bin]# nohup masterha_manager --conf=/etc/mha/app.conf --remove_dead_master_conf --ignore_last_failover < /dev/null > /usr/local/mha/mha.log 2>&1 &
[1] 1646
[root@server4 bin]# masterha_check_status --conf=/etc/mha/app.confapp (pid:1646) is running(0:PING_OK), master:172.25.254.1
查看日志会出来成功：
[root@server4 bin]# tail -10 /usr/local/bin/mha.log
172.25.254.1(172.25.254.1:3306) (current master)
+--172.25.254.2(172.25.254.2:3306)
+--172.25.254.3(172.25.254.3:3306)
Thu Aug 9 23:52:03 2018 - [warning] master_ip_failover_script is not defined.
Thu Aug 9 23:52:03 2018 - [warning] shutdown_script is not defined.
Thu Aug 9 23:52:03 2018 - [info] Set master ping interval 1 seconds.
Thu Aug 9 23:52:03 2018 - [warning] secondary_check_script is not defined. It is highly recommended setting it to check master reachability from two or more routes.
Thu Aug 9 23:52:03 2018 - [info] Starting ping health check on 172.25.254.1(172.25.254.1:3306)..
Thu Aug 9 23:52:03 2018 - [info] Ping(SELECT) succeeded, waiting until MySQL doesn't respond..
[root@server4 ~]# vim /etc/mha/app.conf
master_ip_failover_script=/usr/local/bin/master_ip_failover
master_ip_online_change_script=/usr/local/bin/master_ip_online_change
#将注释的两行打开，脚本拷到指定位置分享两个脚本都需要更改虚拟IP：
[root@server4 bin]# cat master_ip_failover
#!/usr/bin/env perl
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 = '172.25.254.100/24';
my $key = '1';
my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig eth0:$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" ) {
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";
}[root@server4 bin]# cat master_ip_online_change
#!/usr/bin/env perl
use strict;
use warnings FATAL =>'all';
use Getopt::Long;
my $vip = '172.25.254.100/24'; # Virtual IP
my $key = "1";
my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down";
my $exit_code = 0;
my (
$command, $orig_master_is_new_slave, $orig_master_host,
$orig_master_ip, $orig_master_port, $orig_master_user,
$orig_master_password, $orig_master_ssh_user, $new_master_host,
$new_master_ip, $new_master_port, $new_master_user,
$new_master_password, $new_master_ssh_user,
);
GetOptions(
'command=s' => \$command,
'orig_master_is_new_slave' => \$orig_master_is_new_slave,
'orig_master_host=s' => \$orig_master_host,
'orig_master_ip=s' => \$orig_master_ip,
'orig_master_port=i' => \$orig_master_port,
'orig_master_user=s' => \$orig_master_user,
'orig_master_password=s' => \$orig_master_password,
'orig_master_ssh_user=s' => \$orig_master_ssh_user,
'new_master_host=s' => \$new_master_host,
'new_master_ip=s' => \$new_master_ip,
'new_master_port=i' => \$new_master_port,
'new_master_user=s' => \$new_master_user,
'new_master_password=s' => \$new_master_password,
'new_master_ssh_user=s' => \$new_master_ssh_user,
);
exit &main();
sub main {
#print "\n\nIN SCRIPT TEST====$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 "\n\n\n***************************************************************\n";
print "Disabling the VIP - $vip on old master: $orig_master_host\n";
print "***************************************************************\n\n\n\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 "\n\n\n***************************************************************\n";
print "Enabling the VIP - $vip on new master: $new_master_host \n";
print "***************************************************************\n\n\n\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 $orig_master_ssh_user\@$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 $new_master_ssh_user\@$new_master_host \" $ssh_start_vip \"`;
}
# A simple system call that disable the VIP on the old_master
sub stop_vip() {
`ssh $orig_master_ssh_user\@$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";
}进行测试：
[root@server1 etc]# /etc/init.d/mysqld stop 将主端关闭mysql
Stopping mysqld: [ OK ]
[root@server1 etc]# server2会出来顶替成为主端：
[root@server2 MHA]# mysql -pAa@+123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 46
Server version: 5.7.17-log MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
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 |
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------+
| mysql-bin.000001 | 445 | | | bac7ebff-9bde-11e8-8767-5254004b3455:1-2,
c152f584-9bde-11e8-a530-525400e41981:1 |
+------------------+----------+--------------+------------------+----------------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> show slave status\G
Empty set (0.00 sec)
将server1重新打开还是主端：
[root@server1 etc]# /etc/init.d/mysqld start
Starting mysqld: [ OK ]
[root@server1 etc]# mysql -pAa@+123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.17-log MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
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 |
+------------------+----------+--------------+------------------+------------------------------------------+
| mysql-bin.000003 | 194 | | | bac7ebff-9bde-11e8-8767-5254004b3455:1-2 |
+------------------+----------+--------------+------------------+------------------------------------------+
1 row in set (0.00 sec)
mysql> show slave status\G
Empty set (0.00 sec)