开篇
本文主要介绍如何搭建MHA集群，希望给你带来帮助
基本环境介绍
Linux：CentOS 7.4
MySQL：5.7.21+传统复制（开启GTID不搭建binlog server)
VIP：192.168.68.100
| 角色 | ip地址 | 主机名 | server_id | 类型 |
|---|---|---|---|---|
| Master | 192.168.68.161 | server1 | 1413306 | 写 |
| Candicate master | 192.168.68.162 | server2 | 1423306 | 读 |
| Manager/Slave | 192.168.68.163 | server3 | 1433306 | 读/监控/管理 |
server1
主从复制搭建
#创建复制用户
grant replication slave on *.* to 'repl'@'192.168.68.%' identified by 'repl4slave';
flush privileges;
#创建监控用户
grant all privileges on *.* to 'xmm'@'192.168.68.%' identified by 'xmmxmm';
flush privileges;
MHA安装
#软件安装
yum localinstall -y mha4mysql-node-0.56-0.el6.noarch
#SSH登陆检查
ssh server2
ssh server3
如果不是一个新master
#master导出数据
mysqldump --master-data=2 --single-transaction -R --triggers -A >server1-all-180329.sql
VIP手工绑定
绑定：/sbin/ip addr add 192.168.68.100/32 dev ens32
解绑：/sbin/ip addr del 192.168.68.100/32 dev ens32
server2
主从复制搭建
#配置和开启复制
change master to master_host='192.168.68.161',master_port=3306,master_user='repl',master_password='repl4slave',master_auto_position=1;
start slave;
#slave开启read_only
mysql -h127.0.0.1 -p -e 'set global read_only=1'
mysql -h127.0.0.1 -p -e 'set global relay_log_purge=0'
MHA安装
#软件安装
yum localinstall -y mha4mysql-node-0.56-0.el6.noarch
#SSH登陆检查
ssh server1
ssh server3
如果master不是新的
#导入数据
mysql -h127.0.0.1 -uroot -p < /tmp/data/server1-all-180329.sql
server3
主从复制搭建
#导入数据、配置和开启复制
mysql -h127.0.0.1 -uroot -p < /tmp/data/server1-all-180329.sql
change master to master_host='192.168.68.135',master_port=3306,master_user='repl',master_password='repl4slave',master_auto_position=1;
start slave;
#slave开启read_only
mysql -h127.0.0.1 -p -e 'set global read_only=1'
mysql -h127.0.0.1 -p -e 'set global relay_log_purge=0'
MHA安装
#软件安装
yum localinstall -y mha4mysql-node-0.56-0.el6.noarch
yum localinstall -y mha4mysql-manager-0.56-0.el6.noarch
#SSH无密钥验证登陆
ssh-keygen
cd ~/.ssh/
cat id_rsa.pub > authorized_keys
chmod 600 *
scp -r ~/.ssh/ root@192.168.68.161:~/
scp -r ~/.ssh/ root@192.168.68.162:~/
ssh server2
ssh server3
#创建MHA工作目录，上传配置文件和脚本
mkdir -p /etc/masterha
masterha_default.cnf
app1.cnf
master_ip_failover
master_ip_online_change
chmod +x master_ip*
#开启debug
masterha_default.cnf --> log_level=debug
#manager上检查ssh/rple/开启mha进程
masterha_check_ssh xxx
masterha_check_repl xxx
masterha_manager xxx
配置文件和脚本详细
masterha_default.cnf
[server default]
#MySQL的用户和密码
user=xmm
password=xmmxmm
#系统ssh用户
ssh_user=root
#复制用户
repl_user=repl
repl_password=repl4slave
#监控
ping_interval=1
#shutdown_script=""
#日志输出
log_level=debug
#报警脚本
report_script=/etc/masterha/send_report
#切换调用的脚本
master_ip_failover_script= /etc/masterha/master_ip_failover
master_ip_online_change_script= /etc/masterha/master_ip_online_change
app1.cnf
[server default]
#mha manager工作目录
manager_workdir = /var/log/masterha/app1
manager_log = /var/log/masterha/app1/app1.log
remote_workdir = /var/log/masterha/app1
[server1]
hostname=node1
master_binlog_dir = /data/mysql/mysql3306/logs
candidate_master = 0
check_repl_delay = 0
[server2]
hostname=node2
master_binlog_dir=/data/mysql/mysql3306/logs
candidate_master = 1
check_repl_delay = 0
[server3]
hostname=node1
master_binlog_dir = /data/mysql/mysql3306/logs
candidate_master = 0
check_repl_delay = 0
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;
use MHA::DBHelper;
#自定义该组机器的vip
my $vip = "192.168.68.100";
my $if = "ens32";
my (
$command, $ssh_user, $orig_master_host,
$orig_master_ip, $orig_master_port, $new_master_host,
$new_master_ip, $new_master_port, $new_master_user,
$new_master_password
);
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,
'new_master_user=s' => \$new_master_user,
'new_master_password=s' => \$new_master_password,
);
sub add_vip {
my $output1 = `ssh -o ConnectTimeout=15 -o ConnectionAttempts=3 $orig_master_host /sbin/ip addr del $vip/32 dev $if`;
my $output2 = `ssh -o ConnectTimeout=15 -o ConnectionAttempts=3 $new_master_host /sbin/ip addr add $vip/32 dev $if`;
}
exit &main();
sub main {
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 {
# updating global catalog, etc
$exit_code = 0;
};
if ($@) {
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 {
my $new_master_handler = new MHA::DBHelper();
# args: hostname, port, user, password, raise_error_or_not
$new_master_handler->connect( $new_master_ip, $new_master_port,
$new_master_user, $new_master_password, 1 );
## Set read_only=0 on the new master
$new_master_handler->disable_log_bin_local();
print "Set read_only=0 on the new master.\n";
$new_master_handler->disable_read_only();
## Creating an app user on the new master
#print "Creating app user on the new master..\n";
#FIXME_xxx_create_user( $new_master_handler->{dbh} );
$new_master_handler->enable_log_bin_local();
$new_master_handler->disconnect();
## Update master ip on the catalog database, etc
&add_vip();
$exit_code = 0;
};
if ($@) {
warn $@;
# If you want to continue failover, exit 10.
exit $exit_code;
}
exit $exit_code;
}
elsif ( $command eq "status" ) {
# do nothing
exit 0;
}
else {
&usage();
exit 1;
}
}
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
#!/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;
use MHA::DBHelper;
use MHA::NodeUtil;
use Time::HiRes qw( sleep gettimeofday tv_interval );
use Data::Dumper;
my $_tstart;
my $_running_interval = 0.1;
#添加vip定义
my $vip = "192.168.68.100";
my $if = "ens32";
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 drop_vip {
my $output = `ssh -o ConnectTimeout=15 -o ConnectionAttempts=3 $orig_master_host /sbin/ip addr del $vip/32 dev $if`;
#mysql里的连接全部干掉
#FIXME
}
sub add_vip {
my $output = `ssh -o ConnectTimeout=15 -o ConnectionAttempts=3 $new_master_host /sbin/ip addr add $vip/32 dev $if`;
}
sub current_time_us {
my ( $sec, $microsec ) = gettimeofday();
my $curdate = localtime($sec);
return $curdate . " " . sprintf( "%06d", $microsec );
}
sub sleep_until {
my $elapsed = tv_interval($_tstart);
if ( $_running_interval > $elapsed ) {
sleep( $_running_interval - $elapsed );
}
}
sub get_threads_util {
my $dbh = shift;
my $my_connection_id = shift;
my $running_time_threshold = shift;
my $type = shift;
$running_time_threshold = 0 unless ($running_time_threshold);
$type = 0 unless ($type);
my @threads;
my $sth = $dbh->prepare("SHOW PROCESSLIST");
$sth->execute();
while ( my $ref = $sth->fetchrow_hashref() ) {
my $id = $ref->{Id};
my $user = $ref->{User};
my $host = $ref->{Host};
my $command = $ref->{Command};
my $state = $ref->{State};
my $query_time = $ref->{Time};
my $info = $ref->{Info};
$info =~ s/^\s*(.*?)\s*$/$1/ if defined($info);
next if ( $my_connection_id == $id );
next if ( defined($query_time) && $query_time < $running_time_threshold );
next if ( defined($command) && $command eq "Binlog Dump" );
next if ( defined($user) && $user eq "system user" );
next
if ( defined($command)
&& $command eq "Sleep"
&& defined($query_time)
&& $query_time >= 1 );
if ( $type >= 1 ) {
next if ( defined($command) && $command eq "Sleep" );
next if ( defined($command) && $command eq "Connect" );
}
if ( $type >= 2 ) {
next if ( defined($info) && $info =~ m/^select/i );
next if ( defined($info) && $info =~ m/^show/i );
}
push @threads, $ref;
}
return @threads;
}
sub main {
if ( $command eq "stop" ) {
## Gracefully killing connections on the current master
# 1. Set read_only= 1 on the new master
# 2. DROP USER so that no app user can establish new connections
# 3. Set read_only= 1 on the current master
# 4. Kill current queries
# * Any database access failure will result in script die.
my $exit_code = 1;
eval {
## Setting read_only=1 on the new master (to avoid accident)
my $new_master_handler = new MHA::DBHelper();
# args: hostname, port, user, password, raise_error(die_on_error)_or_not
$new_master_handler->connect( $new_master_ip, $new_master_port,
$new_master_user, $new_master_password, 1 );
print current_time_us() . " Set read_only on the new master.. ";
$new_master_handler->enable_read_only();
if ( $new_master_handler->is_read_only() ) {
print "ok.\n";
}
else {
die "Failed!\n";
}
$new_master_handler->disconnect();
# Connecting to the orig master, die if any database error happens
my $orig_master_handler = new MHA::DBHelper();
$orig_master_handler->connect( $orig_master_ip, $orig_master_port,
$orig_master_user, $orig_master_password, 1 );
## Drop application user so that nobody can connect. Disabling per-session binlog beforehand
$orig_master_handler->disable_log_bin_local();
# print current_time_us() . " Drpping app user on the orig master..\n";
print current_time_us() . " drop vip $vip..\n";
#drop_app_user($orig_master_handler);
&drop_vip();
## Waiting for N * 100 milliseconds so that current connections can exit
my $time_until_read_only = 15;
$_tstart = [gettimeofday];
my @threads = get_threads_util( $orig_master_handler->{dbh},
$orig_master_handler->{connection_id} );
while ( $time_until_read_only > 0 && $#threads >= 0 ) {
if ( $time_until_read_only % 5 == 0 ) {
printf
"%s Waiting all running %d threads are disconnected.. (max %d milliseconds)\n",
current_time_us(), $#threads + 1, $time_until_read_only * 100;
if ( $#threads < 5 ) {
print Data::Dumper->new( [$_] )->Indent(0)->Terse(1)->Dump . "\n"
foreach (@threads);
}
}
sleep_until();
$_tstart = [gettimeofday];
$time_until_read_only--;
@threads = get_threads_util( $orig_master_handler->{dbh},
$orig_master_handler->{connection_id} );
}
## Setting read_only=1 on the current master so that nobody(except SUPER) can write
print current_time_us() . " Set read_only=1 on the orig master.. ";
$orig_master_handler->enable_read_only();
if ( $orig_master_handler->is_read_only() ) {
print "ok.\n";
}
else {
die "Failed!\n";
}
## Waiting for M * 100 milliseconds so that current update queries can complete
my $time_until_kill_threads = 5;
@threads = get_threads_util( $orig_master_handler->{dbh},
$orig_master_handler->{connection_id} );
while ( $time_until_kill_threads > 0 && $#threads >= 0 ) {
if ( $time_until_kill_threads % 5 == 0 ) {
printf
"%s Waiting all running %d queries are disconnected.. (max %d milliseconds)\n",
current_time_us(), $#threads + 1, $time_until_kill_threads * 100;
if ( $#threads < 5 ) {
print Data::Dumper->new( [$_] )->Indent(0)->Terse(1)->Dump . "\n"
foreach (@threads);
}
}
sleep_until();
$_tstart = [gettimeofday];
$time_until_kill_threads--;
@threads = get_threads_util( $orig_master_handler->{dbh},
$orig_master_handler->{connection_id} );
}
## Terminating all threads
print current_time_us() . " Killing all application threads..\n";
$orig_master_handler->kill_threads(@threads) if ( $#threads >= 0 );
print current_time_us() . " done.\n";
$orig_master_handler->enable_log_bin_local();
$orig_master_handler->disconnect();
## After finishing the script, MHA executes FLUSH TABLES WITH READ LOCK
$exit_code = 0;
};
if ($@) {
warn "Got Error: $@\n";
exit $exit_code;
}
exit $exit_code;
}
elsif ( $command eq "start" ) {
## Activating master ip on the new master
# 1. Create app user with write privileges
# 2. Moving backup script if needed
# 3. Register new master's ip to the catalog database
# We don't return error even though activating updatable accounts/ip failed so that we don't interrupt slaves' recovery.
# If exit code is 0 or 10, MHA does not abort
my $exit_code = 10;
eval {
my $new_master_handler = new MHA::DBHelper();
# args: hostname, port, user, password, raise_error_or_not
$new_master_handler->connect( $new_master_ip, $new_master_port,
$new_master_user, $new_master_password, 1 );
## Set read_only=0 on the new master
$new_master_handler->disable_log_bin_local();
print current_time_us() . " Set read_only=0 on the new master.\n";
$new_master_handler->disable_read_only();
## Creating an app user on the new master
#print current_time_us() . " Creating app user on the new master..\n";
print current_time_us() . "Add vip $vip on $if..\n";
# create_app_user($new_master_handler);
&add_vip();
$new_master_handler->enable_log_bin_local();
$new_master_handler->disconnect();
## Update master ip on the catalog database, etc
$exit_code = 0;
};
if ($@) {
warn "Got Error: $@\n";
exit $exit_code;
}
exit $exit_code;
}
elsif ( $command eq "status" ) {
# do nothing
exit 0;
}
else {
&usage();
exit 1;
}
}
sub usage {
print
"Usage: master_ip_online_change --command=start|stop|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";
die;
}
自动删除relay log
#检查软件安装有哪些内容
rpm -ql mha4mysql-node-0.56-0.el6.noarch
#2台slave上
[root@192.168.0.142 ~]# cat purge_relay_log.sh
#!/bin/bash
user=xmm
passwd=xmmxmm
port=3306
log_dir='/data/masterha/log'
work_dir='/data'
purge='/usr/bin/purge_relay_logs'
if [ ! -d $log_dir ]
then
mkdir $log_dir -p
fi
$purge --user=$user --password=$passwd --disable_relay_log_purge --port=$port --workdir=$work_dir >> $log_dir/purge_relay_logs.log 2>&1
#添加到crontab定期执行
[root@192.168.0.142 ~]# crontab -l
0 4 * * * /bin/bash /root/purge_relay_log.sh
自动发送邮件
#!/usr/bin/python
# -*- coding: UTF-8 -*-
import smtplib
from email.mime.text import MIMEText
#设置服务器所需信息
#163邮箱服务器地址
mail_host = 'smtp.163.com'
#163用户名
mail_user = 'xxxx'
#密码(部分邮箱为授权码)
mail_pass = 'xxxxx'
#邮件发送方邮箱地址
sender = 'xxxx@163.com'
#邮件接受方邮箱地址，注意需要[]包裹，这意味着你可以写多个邮件地址群发
receivers = ['xxxx@163.com']
#设置email信息
#邮件内容设置
message = MIMEText('content:这是master故障failover切换时自动发送的邮件','plain','utf-8')
#邮件主题
message['Subject'] = 'mha邮件'
#发送方信息
message['From'] = sender
#接受方信息
message['To'] = receivers[0]
#登录并发送邮件
try:
smtpObj = smtplib.SMTP()
#连接到服务器
smtpObj.connect(mail_host,25)
#登录到服务器
#smtpObj = smtplib.SMTP_SSL(mail_host)
smtpObj.login(mail_user,mail_pass)
#发送
smtpObj.sendmail(
sender,receivers,message.as_string())
#退出
smtpObj.quit()
print('success')
except smtplib.SMTPException as e:
print('error',e) #打印错误
启动三步骤与日志
ssh检查
[root@server3 16:20:38 /usr/bin]
#masterha_check_ssh --global_conf=/etc/masterha/masterha_default.cnf --conf=/etc/masterha/app1.cnf
Tue Apr 3 16:28:59 2018 - [info] Reading default configuration from /etc/masterha/masterha_default.cnf..
Tue Apr 3 16:28:59 2018 - [info] Reading application default configuration from /etc/masterha/app1.cnf..
Tue Apr 3 16:28:59 2018 - [info] Reading server configuration from /etc/masterha/app1.cnf..
Tue Apr 3 16:28:59 2018 - [info] Starting SSH connection tests..
Tue Apr 3 16:29:01 2018 - [debug]
Tue Apr 3 16:29:00 2018 - [debug] Connecting via SSH from root@server3(192.168.68.163:22) to root@server1(192.168.68.161:22)..
Tue Apr 3 16:29:00 2018 - [debug] ok.
Tue Apr 3 16:29:00 2018 - [debug] Connecting via SSH from root@server3(192.168.68.163:22) to root@server2(192.168.68.162:22)..
Tue Apr 3 16:29:00 2018 - [debug] ok.
Tue Apr 3 16:29:04 2018 - [debug]
Tue Apr 3 16:28:59 2018 - [debug] Connecting via SSH from root@server1(192.168.68.161:22) to root@server2(192.168.68.162:22)..
Tue Apr 3 16:28:59 2018 - [debug] ok.
Tue Apr 3 16:28:59 2018 - [debug] Connecting via SSH from root@server1(192.168.68.161:22) to root@server3(192.168.68.163:22)..
Tue Apr 3 16:29:04 2018 - [debug] ok.
Tue Apr 3 16:29:04 2018 - [debug]
Tue Apr 3 16:28:59 2018 - [debug] Connecting via SSH from root@server2(192.168.68.162:22) to root@server1(192.168.68.161:22)..
Tue Apr 3 16:29:00 2018 - [debug] ok.
Tue Apr 3 16:29:00 2018 - [debug] Connecting via SSH from root@server2(192.168.68.162:22) to root@server3(192.168.68.163:22)..
Tue Apr 3 16:29:04 2018 - [debug] ok.
Tue Apr 3 16:29:04 2018 - [info] All SSH connection tests passed successfully.
复制检查
[root@server3 16:29:04 /usr/bin]
#masterha_check_repl --global_conf=/etc/masterha/masterha_default.cnf --conf=/etc/masterha/app1.cnf Tue Apr 3 16:29:12 2018 - [info] Reading default configuration from /etc/masterha/masterha_default.cnf..
Tue Apr 3 16:29:12 2018 - [info] Reading application default configuration from /etc/masterha/app1.cnf..
Tue Apr 3 16:29:12 2018 - [info] Reading server configuration from /etc/masterha/app1.cnf..
Tue Apr 3 16:29:12 2018 - [info] MHA::MasterMonitor version 0.56.
Tue Apr 3 16:29:12 2018 - [debug] Connecting to servers..
Tue Apr 3 16:29:13 2018 - [debug] Connected to: server1(192.168.68.161:3306), user=xmm
Tue Apr 3 16:29:13 2018 - [debug] Number of slave worker threads on host server1(192.168.68.161:3306): 0
Tue Apr 3 16:29:13 2018 - [debug] Connected to: server2(192.168.68.162:3306), user=xmm
Tue Apr 3 16:29:13 2018 - [debug] Number of slave worker threads on host server2(192.168.68.162:3306): 0
Tue Apr 3 16:29:13 2018 - [debug] Connected to: server3(192.168.68.163:3306), user=xmm
Tue Apr 3 16:29:13 2018 - [debug] Number of slave worker threads on host server3(192.168.68.163:3306): 0
Tue Apr 3 16:29:13 2018 - [debug] Comparing MySQL versions..
Tue Apr 3 16:29:13 2018 - [debug] Comparing MySQL versions done.
Tue Apr 3 16:29:13 2018 - [debug] Connecting to servers done.
Tue Apr 3 16:29:13 2018 - [info] GTID failover mode = 1
Tue Apr 3 16:29:13 2018 - [info] Dead Servers:
Tue Apr 3 16:29:13 2018 - [info] Alive Servers:
Tue Apr 3 16:29:13 2018 - [info] server1(192.168.68.161:3306)
Tue Apr 3 16:29:13 2018 - [info] server2(192.168.68.162:3306)
Tue Apr 3 16:29:13 2018 - [info] server3(192.168.68.163:3306)
Tue Apr 3 16:29:13 2018 - [info] Alive Slaves:
Tue Apr 3 16:29:13 2018 - [info] server2(192.168.68.162:3306) Version=5.7.21-log (oldest major version between slaves) log-bin:enabled
Tue Apr 3 16:29:13 2018 - [info] GTID ON
Tue Apr 3 16:29:13 2018 - [debug] Relay log info repository: FILE
Tue Apr 3 16:29:13 2018 - [info] Replicating from 192.168.68.161(192.168.68.161:3306)
Tue Apr 3 16:29:13 2018 - [info] Primary candidate for the new Master (candidate_master is set)
Tue Apr 3 16:29:13 2018 - [info] server3(192.168.68.163:3306) Version=5.7.21-log (oldest major version between slaves) log-bin:enabled
Tue Apr 3 16:29:13 2018 - [info] GTID ON
Tue Apr 3 16:29:13 2018 - [debug] Relay log info repository: FILE
Tue Apr 3 16:29:13 2018 - [info] Replicating from 192.168.68.161(192.168.68.161:3306)
Tue Apr 3 16:29:13 2018 - [info] Current Alive Master: server1(192.168.68.161:3306)
Tue Apr 3 16:29:13 2018 - [info] Checking slave configurations..
Tue Apr 3 16:29:13 2018 - [info] Checking replication filtering settings..
Tue Apr 3 16:29:13 2018 - [info] binlog_do_db= , binlog_ignore_db=
Tue Apr 3 16:29:13 2018 - [info] Replication filtering check ok.
Tue Apr 3 16:29:13 2018 - [info] GTID (with auto-pos) is supported. Skipping all SSH and Node package checking.
Tue Apr 3 16:29:13 2018 - [info] Checking SSH publickey authentication settings on the current master..
Tue Apr 3 16:29:13 2018 - [debug] SSH connection test to server1, option -o StrictHostKeyChecking=no -o PasswordAuthentication=no -o BatchMode=yes -o ConnectTimeout=5, timeout 5
Tue Apr 3 16:29:13 2018 - [info] HealthCheck: SSH to server1 is reachable.
Tue Apr 3 16:29:13 2018 - [info]
server1(192.168.68.161:3306) (current master)
+--server2(192.168.68.162:3306)
+--server3(192.168.68.163:3306)
Tue Apr 3 16:29:13 2018 - [info] Checking replication health on server2..
Tue Apr 3 16:29:13 2018 - [info] ok.
Tue Apr 3 16:29:13 2018 - [info] Checking replication health on server3..
Tue Apr 3 16:29:13 2018 - [info] ok.
Tue Apr 3 16:29:13 2018 - [info] Checking master_ip_failover_script status:
Tue Apr 3 16:29:13 2018 - [info] /etc/masterha/master_ip_failover --command=status --ssh_user=root --orig_master_host=server1 --orig_master_ip=192.168.68.161 --orig_master_port=3306
Tue Apr 3 16:29:13 2018 - [info] OK.
Tue Apr 3 16:29:13 2018 - [warning] shutdown_script is not defined.
Tue Apr 3 16:29:13 2018 - [debug] Disconnected from server1(192.168.68.161:3306)
Tue Apr 3 16:29:13 2018 - [debug] Disconnected from server2(192.168.68.162:3306)
Tue Apr 3 16:29:13 2018 - [debug] Disconnected from server3(192.168.68.163:3306)
Tue Apr 3 16:29:13 2018 - [info] Got exit code 0 (Not master dead).
MySQL Replication Health is OK.
启动MHA
[root@server3 16:29:13 /usr/bin]
#masterha_manager --global_conf=/etc/masterha/masterha_default.cnf --conf=/etc/masterha/app1.cnf > /var/log/masterha/app1/app1.log 2>&1 &
[2] 4406
压测与故障切换
有关故障切换参考另外一篇博文
