4-1-6 MHA相关配置文件和脚本
最后更新于：2022-04-02 07:43:59
### app1.cnf
```shell
[server default]
manager_log=/etc/mha/log/app1.log
manager_workdir=/etc/mha/app1/
master_binlog_dir=/data/mysql3306
master_ip_failover_script=/etc/mha/master_ip_failover
master_ip_online_change_script=/etc/mha/master_ip_online_change
ping_interval=1
remote_workdir=/tmp
secondary_check_script=/bin/masterha_secondary_check -s ip235 -s ip236 --user=root --master_host=ip230 --master_ip=192.168.0.230 --master_port=3306
ssh_user=root
user=mha
password=mha
repl_password=repl
repl_user=repl
[server1]
hostname=192.168.0.230
port=3306
[server2]
candidate_master=1
check_repl_delay=0
hostname=192.168.0.235
port=3306
[server3]
hostname=192.168.0.236
port=3306
```
注释
```shell
manager_log=/etc/mha/log/app1.log #日志位置
manager_workdir=/etc/mha/app1/ # MHA工作目录
master_binlog_dir=/data/mysql3306 #设置Master保存binlog位置的目录
master_ip_failover_script=/etc/mha/master_ip_failover #自动Failover脚本
master_ip_online_change_script=/etc/mha/master_ip_online_change #设置手动切换脚本
ping_interval=1 #设置监控主库的间隔
remote_workdir=/tmp #binlog临时保存目录
secondary_check_script=/bin/masterha_secondary_check -s ip235 -s ip236 --user=root --master_host=ip230 --master_ip=192.168.0.230 --master_port=3306 #检查存活脚本
ssh_user=root #ssh登录名
user=mha #MHA监控所有MySQL节点的用户名
password=mha #MHA监控所有MySQL节点的密码
repl_user=repl #MySQL复制的用户名
repl_password=repl #MySQL复制的密码
[server2]
candidate_master=1 #候选主库
check_repl_delay=0 #忽略延迟大小
hostname=192.168.0.235
```
### master_ip_failover
```shell
#!/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 = '192.168.0.20/24';
my $key = 'wvip';
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
```shell
#!/usr/bin/env perl
use strict;
use warnings FATAL =>'all';
use Getopt::Long;
my $vip = '192.168.0.20/24'; # Virtual IP
my $key = "wvip";
my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down";
my $exit_code = 0;
my $orig_master_ssh_user='root';
my $new_master_ssh_user='root';
my (
$command, $orig_master_is_new_slave, $orig_master_host,
$orig_master_ip, $orig_master_port, $orig_master_user,
$orig_master_password, $new_master_host,
$new_master_ip, $new_master_port, $new_master_user,
$new_master_password,
);
GetOptions(
'command=s' => \$command,
'orig_master_is_new_slave' => \$orig_master_is_new_slave,
'orig_master_host=s' => \$orig_master_host,
'orig_master_ip=s' => \$orig_master_ip,
'orig_master_port=i' => \$orig_master_port,
'orig_master_user=s' => \$orig_master_user,
'orig_master_password=s' => \$orig_master_password,
'orig_master_ssh_user=s' => \$orig_master_ssh_user,
'new_master_host=s' => \$new_master_host,
'new_master_ip=s' => \$new_master_ip,
'new_master_port=i' => \$new_master_port,
'new_master_user=s' => \$new_master_user,
'new_master_password=s' => \$new_master_password,
'new_master_ssh_user=s' => \$new_master_ssh_user,
);
exit &main();
sub main {
#print "\n\nIN SCRIPT TEST====$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=po
rt –new_master_host=host –new_master_ip=ip –new_master_port=port\n";
}
```
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