基于MHA实现的mysql高可用集群
基于MHA实现的mysql高可用集群
节点之间部署：
| 角色 | 主机名 | ip | server-id | 角色 |
|---|---|---|---|---|
| Master（Monitor host） | server1 | 172.25.30.1 | 1 | 监控复制组manager |
| Candicate master | server2 | 172.25.30.2 | 2 | 读 |
| Slave | server3 | 172.25.30.3 | 3 | 读 |
1.集群节点实现gtid实现的半同步主从复制：
server1:master(node1)—>manager
server2:slave(node2)
server3:slave(node3)
三个节点的配置文件完全相同。创建一个相同的用户并授权。
1.实现gtid实现的半同步复制
Master 给用户授权
Slave给用户授权和master创建相同的用户
查看slave状态时如果出现了下面的情况：原因是master已经执行了建立用户的动作slave不愿意在执行第二次,就会报错。
解决方法：在slave端关闭stop slave；
在master端reset master；
之后在salve端 reset slave——> start slave—–>show slave status\G;
2. MHA—manager:
Manager工具包主要包括以下几个工具：
masterha_check_ssh 检查MHA的SSH配置状况
masterha_check_repl 检查MySQL复制状况
masterha_manger 启动MHA
masterha_check_status 检测当前MHA运行状态
masterha_master_monitor 检测master是否宕机
masterha_master_switch 控制故障转移（自动或者手动）
masterha_conf_host 添加或删除配置的server信息[root@server1 ~]# ls
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
[root@server1 ~]# yum install * -y
[root@server1 ~]# mkdir /etc/masterha
[root@server1 ~]# cd /etc/masterha/
[root@server1 masterha]# ls3.生成加密key，使得集群之间所有的主机ssh可以免密
[root@server1 ~]# 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:
64:a7:ef:78:bf:0b:7b:9d:8d:bd:8d:87:5b:51:be:42 root@server1
The key's randomart image is:
+--[ RSA 2048]----+
| |
| |
| o . .|
| o o ..|
| S E ..|
| . . o|
| o o B.|
| o.o. *o=|
| ..oo+oo+o|
+-----------------+
[root@server1 .ssh]# ssh-copy-id 172.25.30.2
The authenticity of host '172.25.30.2 (172.25.30.2)' can't be established.
RSA key fingerprint is df:7b:e1:29:cb:eb:8b:07:40:9d:58:21:a3:31:73:32.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '172.25.30.2' (RSA) to the list of known hosts.
root@172.25.30.2's password:
Now try logging into the machine, with "ssh '172.25.30.2'", and check in:
.ssh/authorized_keys
[root@server1 .ssh]# ssh-copy-id 172.25.30.3
[root@server2 .ssh]# scp * [email protected]:.ssh/
root@172.25.30.1's password:
authorized_keys 100% 394 0.4KB/s 00:00
id_rsa 100% 1675 1.6KB/s 00:00
known_hosts 100% 1576 1.5KB/s 00:00节点之间相互连接测试：
[root@server1 .ssh]# ssh server2
The authenticity of host 'server2 (172.25.30.2)' can't be established.
RSA key fingerprint is df:7b:e1:29:cb:eb:8b:07:40:9d:58:21:a3:31:73:32.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'server2' (RSA) to the list of known hosts.
[root@server1 .ssh]# ssh server3
Warning: Permanently added 'server3' (RSA) to the list of known hosts.
Last login: Thu Aug 9 04:51:47 2018 from 172.25.30.250
[root@server3 ~]# logout
Connection to server3 closed.
[root@server3 ~]# ssh server2
Last login: Thu Aug 9 06:20:26 2018 from server3
[root@server2 ~]# ssh server1
Last login: Thu Aug 9 05:22:51 2018 from server3将server1上的高可用组件中的node安装包分别要在server2、server3和server1上安装
将server1上的密钥文件传给server2、server3和server1，使每个主机都能免密ssh
Node工具包（这些工具通常由MHA Manager的脚本触发，无需人为操作）主要包括以下几个工具：
save_binary_logs 保存和复制master的二进制日志
apply_diff_relay_logs 识别差异的中继日志事件并将其差异的事件应用于其他的slave
filter_mysqlbinlog 去除不必要的ROLLBACK事件（MHA已不再使用这个工具）
purge_relay_logs 清除中继日志（不会阻塞SQL线程）[root@server1 ~]# scp mha4mysql-node-0.56-0.el6.noarch.rpm server2:
mha4mysql-node-0.56-0.el6.noarch.rpm 100% 35KB 35.5KB/s 00:00
[root@server1 ~]# scp mha4mysql-node-0.56-0.el6.noarch.rpm server3:
mha4mysql-node-0.56-0.el6.noarch.rpm 100% 35KB 35.5KB/s 00:00
[root@server1 ~]# yum install mha4mysql-node-0.56-0.el6.noarch.rpm -y
[root@server2 ~]# yum install mha4mysql-node-0.56-0.el6.noarch.rpm -y
[root@server3 ~]# yum install mha4mysql-node-0.56-0.el6.noarch.rpm -y建立脚本进行检测节点部署：
[root@server1 .ssh]# vim /etc/masterha/app.cnf
[server default]
manager_workdir=/etc/masterha/ //设置manager的工作目录
manager_log=/etc/masterha/app1.log //设置manager的日志
master_binlog_dir=/data/mysql //设置master 保存binlog的位置，以便MHA可以找到master的日志，我这里的也就是mysql的数据目录
master_ip_failover_script= /usr/local/bin/master_ip_failover //设置自动failover时候的切换脚本
master_ip_online_change_script= /usr/local/bin/master_ip_online_change //设置手动切换时候的切换脚本
password=Cqmyg+666 //设置mysql中root用户的密码
user=root //设置用户root
ping_interval=1 //设置监控主库，发送ping包的时间间隔，默认是3秒，尝试三次没有回应的时候自动进行railover
remote_workdir=/tmp //设置远端mysql在发生切换时binlog的保存位置
password=Redhat123*/设置复制用户的密码
repl_user=repl //设置复制环境中的复制用户名
report_script=/root/MHA/send_report //设置发生切换后发送的报警的脚本
secondary_check_script= /usr/bin/masterha_secondary_check -s 172.25.31.1 -s 172.25.31.2
shutdown_script=""
ssh_user=root //设置ssh的登录用户名
[server1]
hostname=172.25.30.1
port=3306
#candidate_master=1
#check_repl_delay=0
[server2]
hostname=172.25.30.2
port=3306
#candidate_master=1 //设置为候选master，如果设置该参数以后，发生主从切换以后将会将此从库提升为主库，即使这个主库不是集群中事件最新的slave
#check_repl_delay=0//默认情况下如果一个slave落后master 100M的relay logs的话，MHA将不会选择该slave作为一个新的master，因为对于这个slave的恢复需要花费很长时间，通过设置check_repl_delay=0,MHA触发切换在选择一个新的master的时候将会忽略复制延时，这个参数对于设置了candidate_master=1的主机非常有用，因为这个候选主在切换的过程中一定是新的master
[server3]
hostname=172.25.30.3
port=3306
no_master=14.MHA高可用ssh公钥免密检查，正常，如果集群之间没有做免密，无法通过
asterha_check_ssh –conf=/etc/masterha/app.cnf #交互连接测试通过
[root@server1 ~]# masterha_check_ssh --conf=/etc/masterha/app.cnf
Sat Aug 11 02:54:37 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sat Aug 11 02:54:37 2018 - [info] Reading application default configuration from /etc/masterha/app.cnf..
Sat Aug 11 02:54:37 2018 - [info] Reading server configuration from /etc/masterha/app.cnf..
Sat Aug 11 02:54:37 2018 - [info] Starting SSH connection tests..
Sat Aug 11 02:54:37 2018 - [debug]
Sat Aug 11 02:54:37 2018 - [debug] Connecting via SSH from root@172.25.30.1(172.25.30.1:22) to root@172.25.30.2(172.25.30.2:22)..
Sat Aug 11 02:54:37 2018 - [debug] ok.
Sat Aug 11 02:54:37 2018 - [debug] Connecting via SSH from root@172.25.30.1(172.25.30.1:22) to root@172.25.30.3(172.25.30.3:22)..
Sat Aug 11 02:54:37 2018 - [debug] ok.
Sat Aug 11 02:54:38 2018 - [debug]
Sat Aug 11 02:54:37 2018 - [debug] Connecting via SSH from root@172.25.30.2(172.25.30.2:22) to root@172.25.30.1(172.25.30.1:22)..
Sat Aug 11 02:54:38 2018 - [debug] ok.
Sat Aug 11 02:54:38 2018 - [debug] Connecting via SSH from root@172.25.30.2(172.25.30.2:22) to root@172.25.30.3(172.25.30.3:22)..
Sat Aug 11 02:54:38 2018 - [debug] ok.
Sat Aug 11 02:54:39 2018 - [debug]
Sat Aug 11 02:54:38 2018 - [debug] Connecting via SSH from root@172.25.30.3(172.25.30.3:22) to root@172.25.30.1(172.25.30.1:22)..
Sat Aug 11 02:54:38 2018 - [debug] ok.
Sat Aug 11 02:54:38 2018 - [debug] Connecting via SSH from root@172.25.30.3(172.25.30.3:22) to root@172.25.30.2(172.25.30.2:22)..
Sat Aug 11 02:54:38 2018 - [debug] ok.
Sat Aug 11 02:54:39 2018 - [info] All SSH connection tests passed successfully.masterha_check_repl –conf=/etc/masterha/app.cnf #节点配置文件检测注意千万不要把read-only写在永久配置文件中否册当slave成为master时是写不进去数据的我们可以在mysql中定义临时变量
Sat Aug 11 02:55:12 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sat Aug 11 02:55:12 2018 - [info] Reading application default configuration from /etc/masterha/app.cnf..
Sat Aug 11 02:55:12 2018 - [info] Reading server configuration from /etc/masterha/app.cnf..
Sat Aug 11 02:55:12 2018 - [info] MHA::MasterMonitor version 0.56.
Sat Aug 11 02:55:12 2018 - [info] GTID failover mode = 1
Sat Aug 11 02:55:12 2018 - [info] Dead Servers:
Sat Aug 11 02:55:12 2018 - [info] Alive Servers:
Sat Aug 11 02:55:12 2018 - [info] 172.25.30.1(172.25.30.1:3306)
Sat Aug 11 02:55:12 2018 - [info] 172.25.30.2(172.25.30.2:3306)
Sat Aug 11 02:55:12 2018 - [info] 172.25.30.3(172.25.30.3:3306)
Sat Aug 11 02:55:12 2018 - [info] Current Alive Master: 172.25.30.1(172.25.30.1:3306)
Sat Aug 11 02:55:12 2018 - [info] Checking slave configurations..
Sat Aug 11 02:55:12 2018 - [info] read_only=1 is not set on slave 172.25.30.2(172.25.30.2:3306).
Sat Aug 11 02:55:12 2018 - [info] read_only=1 is not set on slave 172.25.30.3(172.25.30.3:3306).
Sat Aug 11 02:55:12 2018 - [info] Checking replication filtering settings..
Sat Aug 11 02:55:12 2018 - [info] binlog_do_db= , binlog_ignore_db=
Sat Aug 11 02:55:12 2018 - [info] Replication filtering check ok.
Sat Aug 11 02:55:12 2018 - [info] GTID (with auto-pos) is supported. Skipping all SSH and Node package checking.
Sat Aug 11 02:55:12 2018 - [info] Checking SSH publickey authentication settings on the current master..
Sat Aug 11 02:55:12 2018 - [info] HealthCheck: SSH to 172.25.30.1 is reachable.
Sat Aug 11 02:55:12 2018 - [info]
172.25.30.1(172.25.30.1:3306) (current master)
+--172.25.30.2(172.25.30.2:3306)
+--172.25.30.3(172.25.30.3:3306)
Sat Aug 11 02:55:12 2018 - [info] Checking replication health on 172.25.30.2..
Sat Aug 11 02:55:12 2018 - [info] ok.
Sat Aug 11 02:55:12 2018 - [info] Checking replication health on 172.25.30.3..
Sat Aug 11 02:55:12 2018 - [info] ok.
Sat Aug 11 02:55:12 2018 - [warning] master_ip_failover_script is not defined.
Sat Aug 11 02:55:12 2018 - [warning] shutdown_script is not defined.
Sat Aug 11 02:55:12 2018 - [info] Got exit code 0 (Not master dead).
MySQL Replication Health is OK.在server3上授权可以登陆root用户在server1上测试登陆：
mysql> grant all on . to root@’172.25.30.%’ identified by ‘Redhat123*’;
测试一：有报错额警告所以我们根据报错修改
[root@server1 ~]# masterha_check_repl –conf=/etc/masterha/app.cnf
这里面的warning—–>read only没有在slave上面设置；我们是不可以在配置文件里面写的因为当slave切换成master时,如果还是只读的话就会出现意想不到的结果：该设置是临时的
再次测试：
Manager开启监控服务：
nohup masterha_manager –conf=/etc/masterha/app.cnf –ignore_last_failover –ignore_last_failover &
–ignore_last_failover #忽略多次切换生成文件检测.manager
在管理再次切换时会自动检测/etc/masterha/是否生成app.failover.complete文件,如果存在他就会阻止下次切换,在8小时内切换太过频繁会导致数据的不稳定，为了实验检测我们可以设置
–ignore_last_failover 忽略检测；或着每次切换之后删除该文件
手动切换分两种状态切换：
1.msater是alive想切换到另外一个新的slave为master
masterha_master_switch –conf=/etc/masterha/app.cnf –master_state=alive –new_master_host=172.25.30.2 –new_master_port=3306 –orig_master_is_new_slave
[root@server1 ~]# masterha_master_switch --conf=/etc/masterha/app.cnf --master_state=alive --new_master_host=172.25.30.2 --new_master_port=3306 --orig_master_is_new_slave
Sat Aug 11 05:51:07 2018 - [info] GTID failover mode = 1
Sat Aug 11 05:51:07 2018 - [info] Current Alive Master: 172.25.30.1(172.25.30.1:3306)
Sat Aug 11 05:51:07 2018 - [info] Alive Slaves:
Sat Aug 11 05:51:07 2018 - [info] 172.25.30.2(172.25.30.2:3306) Version=5.7.17-log (oldest major version between slaves) log-bin:enabled
Sat Aug 11 05:51:07 2018 - [info] GTID ON
Sat Aug 11 05:51:07 2018 - [info] Replicating from 172.25.30.1(172.25.30.1:3306)
Sat Aug 11 05:51:07 2018 - [info] 172.25.30.3(172.25.30.3:3306) Version=5.7.17-log (oldest major version between slaves) log-bin:enabled
Sat Aug 11 05:51:07 2018 - [info] GTID ON
Sat Aug 11 05:51:07 2018 - [info] Replicating from 172.25.30.1(172.25.30.1:3306)
Sat Aug 11 05:51:07 2018 - [info] Not candidate for the new Master (no_master is set)
Sat Aug 11 05:51:09 2018 - [info] 172.25.30.2 can be new master.
Sat Aug 11 05:51:09 2018 - [info]
From:
172.25.30.1(172.25.30.1:3306) (current master)
+--172.25.30.2(172.25.30.2:3306)
+--172.25.30.3(172.25.30.3:3306)
To:
172.25.30.2(172.25.30.2:3306) (new master)
+--172.25.30.3(172.25.30.3:3306)
+--172.25.30.1(172.25.30.1:3306)
Starting master switch from 172.25.30.1(172.25.30.1:3306) to 172.25.30.2(172.25.30.2:3306)? (yes/NO): yes
Sat Aug 11 05:51:11 2018 - [info] Checking whether 172.25.30.2(172.25.30.2:3306) is ok for the new master.
Sat Aug 11 05:51:14 2018 - [info] All other slaves should start replication from here. Statement should be: CHANGE MASTER TO MASTER_HOST='172.25.30.2', MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER='repl', MASTER_PASSWORD='xxx';
Sat Aug 11 05:51:14 2018 - [info] Setting read_only=0 on 172.25.30.2(172.25.30.2:3306)..
Sat Aug 11 05:51:14 2018 - [info] ok.
Sat Aug 11 05:51:14 2018 - [info]
Sat Aug 11 05:51:14 2018 - [info] * Switching slaves in parallel..
Sat Aug 11 05:51:14 2018 - [info]
Sat Aug 11 05:51:14 2018 - [info] -- Slave switch on host 172.25.30.3(172.25.30.3:3306) started, pid: 4593
Sat Aug 11 05:51:14 2018 - [info]
Sat Aug 11 05:51:15 2018 - [info] Log messages from 172.25.30.3 ...
Sat Aug 11 05:51:15 2018 - [info]
Sat Aug 11 05:51:15 2018 - [info] Starting orig master as a new slave..
Sat Aug 11 05:51:15 2018 - [info] Resetting slave 172.25.30.1(172.25.30.1:3306) and starting replication from the new master 172.25.30.2(172.25.30.2:3306)..
Sat Aug 11 05:51:16 2018 - [info] Executed CHANGE MASTER.
Sat Aug 11 05:51:17 2018 - [info] Slave started.
Sat Aug 11 05:51:17 2018 - [info] All new slave servers switched successfully.
Sat Aug 11 05:51:17 2018 - [info] 172.25.30.2: Resetting slave info succeeded.
Sat Aug 11 05:51:17 2018 - [info] Switching master to 172.25.30.2(172.25.30.2:3306) completed successfully.第二种状态：从dead—–>alive
masterha_master_switch –master_state=dead –conf=/etc/masterha/app.cnf –dead_master_host=172.25.30.2 –dead_master_port=3306 –new_master_host=172.25.30.1 –new_master_port=3306 –ignore_last_failover
自动切换：
在manger监控工作的
nohup masterha_manager –conf=/etc/masterha/app.cnf –ignore_last_failover &
查看切换是否成功：
当宕掉的master(被kill的server2)想要重新加入集群时首先：
/etc/init.d/mysqld start
mysql -pRedhat123*
mysql> change master to master_host='172.25.30.1',master_user='repl',master_password='Redhat123*',MASTER_AUTO_POSITION=1; #指向新的master；
start slave;
Master创建数据检测是否同步：
添加脚本：添加VIP—>172.25.30.100
编辑manager：/usr/local/bin/master_ip_online_change；；；
添加vip检测：编辑压测脚本。
1./etc/my.cnf#添加脚本
2.脚本在/usr/local/bin/
3.添加可执行权限
master_ip_failover：压测脚本
#!/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 = '172.25.30.100/24';
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";
}master_ip_online_change #在线切换脚本
#!/usr/bin/env perl
use strict;
use warnings FATAL =>'all';
use Getopt::Long;
my $vip = '172.25.30.100/24'; # 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";
}添加脚本之后再次检测：
Master是谁vip就在绑定在谁的ip上：
在线切换：
自动切换：
Slave切换成master vip会跑到他的上面：
2>新的master创建测试是否同步
Slave端查看：
添加vip我们可以在外界登陆这样就可以对数据库进行操作：
