MHA集群搭建

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 7.4MySQL：5.7.21+传统复制（开启GTID不搭建binlog server)VIP：192.168.68.100

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 server2ssh 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_onlymysql -h227.0.0.1 -p -e 'set global read_only=1'mysql -h227.0.0.1 -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 server1ssh server3

如果master不是新的

#导入数据mysql -h227.0.0.1 -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 -h227.0.0.1 -uroot -p < /tmp/data/server1-all-180329.sqlchange 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_onlymysql -h227.0.0.1 -p -e 'set global read_only=1'mysql -h227.0.0.1 -p -e 'set global relay_log_purge=0'

MHA安装

#软件安装yum localinstall -y mha4mysql-node-0.56-0.el6.noarchyum localinstall -y mha4mysql-manager-0.56-0.el6.noarch#SSH无密钥验证登陆ssh-keygencd ~/.ssh/cat id_rsa.pub > authorized_keyschmod 600 *scp -r ~/.ssh/ root@192.168.68.161:~/scp -r ~/.ssh/ root@192.168.68.162:~/ssh server2ssh server3#创建MHA工作目录，上传配置文件和脚本mkdir -p /etc/masterhamasterha_default.cnfapp1.cnfmaster_ip_failovermaster_ip_online_changechmod +x master_ip*#开启debugmasterha_default.cnf --> log_level=debug#manager上检查ssh/rple/开启mha进程masterha_check_ssh xxxmasterha_check_repl xxxmasterha_manager xxx

配置文件和脚本详细

masterha_default.cnf

[server default]#MySQL的用户和密码user=xmmpassword=xmmxmm#系统ssh用户ssh_user=root#复制用户repl_user=replrepl_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_failovermaster_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/app1manager_log = /var/log/masterha/app1/app1.logremote_workdir = /var/log/masterha/app1[server1]hostname=node1master_binlog_dir = /data/mysql/mysql3306/logscandidate_master = 0check_repl_delay = 0[server2]hostname=node2master_binlog_dir=/data/mysql/mysql3306/logscandidate_master = 1check_repl_delay = 0[server3]hostname=node1master_binlog_dir = /data/mysql/mysql3306/logscandidate_master = 0check_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vipmy $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( "d", $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/bashuser=xmmpasswd=xmmxmmport=3306log_dir='/data/masterha/log'work_dir='/data'purge='/usr/bin/purge_relay_logs'if [ ! -d $log_dir ]then   mkdir $log_dir -pfi$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 -l0 4 * * * /bin/bash /root/purge_relay_log.sh

自动发送邮件

#!/usr/bin/python# -*- coding: UTF-8 -*-import smtplibfrom 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=xmmTue Apr  3 16:29:13 2018 - [debug]  Number of slave worker threads on host server1(192.168.68.161:3306): 0Tue Apr  3 16:29:13 2018 - [debug]  Connected to: server2(192.168.68.162:3306), user=xmmTue Apr  3 16:29:13 2018 - [debug]  Number of slave worker threads on host server2(192.168.68.162:3306): 0Tue Apr  3 16:29:13 2018 - [debug]  Connected to: server3(192.168.68.163:3306), user=xmmTue Apr  3 16:29:13 2018 - [debug]  Number of slave worker threads on host server3(192.168.68.163:3306): 0Tue 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 = 1Tue 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:enabledTue Apr  3 16:29:13 2018 - [info]     GTID ONTue Apr  3 16:29:13 2018 - [debug]    Relay log info repository: FILETue 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:enabledTue Apr  3 16:29:13 2018 - [info]     GTID ONTue Apr  3 16:29:13 2018 - [debug]    Relay log info repository: FILETue 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 5Tue 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