背景介绍
高可用架构对于互联网服务基本是标配，无论是应用服务还是数据库服务都需要做到高可用。本文是对MySQL数据库的高可用方案中，基于主从复制的MHA软件理论部分进行梳理和小结。
MHA软件介绍
1.MHA软件是由MHA Manager（管理节点）和MHA Node（数据节点）组成
2.MHA Manager可以单独部署在一台独立的机器上，也可以部署在一台slave节点上
3.MHA Node运行在每台MySQL服务器上
4.MHA Manager会定时探测集群中的master节点，当master出现故障时，自动将数据最新的slave提升为新的master，然后将其他slave重新指向新的master恢复主从复制。
5.整个故障转移过程对应用程序完全透明
MHA架构介绍
1.目前MHA主要支持一主多从的架构，要搭建MHA，要求一个复制集群中必须最少有三台数据库服务器
2.在一主两从的MHA集群架构中，一台充当master，一台充当备用master，一台充当slave
3.因为至少需要三台服务器，出于机器成本的考虑，淘宝在该基础上做了改进，目前淘宝TMHA支持一主一从
4.我们自己使用时，也可以使用1主1从，但是master主机宕机后无法切换，以及无法补全binlog。不过，master的mysqld进程crash后，还是可以切换成功，以及补全binlog
MHA切换原理
自动故障切换过程
1.配置文件检查阶段，这个阶段会检查整个集群配置文件配置
2.宕机的master处理，这个阶段包括vip移除操作，主机关机操作
3.复制dead master和最新slave相差的relay log，并保存到MHA Manager定义的目录下
4.识别含有最新更新的slave
5.应用从master保存的二进制日志事件（binlog events）
6.提升一个slave为新的master
7.使其他的slave连接新的master进行复制
手工故障切换过程
注意事项：MHA Manager必须没有运行
1.手工调用MHA进行故障切换，masterha_master_switch
2.在经历配置文件检查、存活服务器检查、集群复制检查、备用master设置检查后，询问master阵亡，是否进行切换
3.宕机的master处理，这个阶段包括vip移除操作，主机关机操作
4.复制dead master和最新slave相差的relay log，并保存到MHA Manager定义的目录下
5.识别含有最新更新的slave
6.应用从master保存的二进制日志事件（binlog events）
7.提升一个slave为新的master
8.使其他的slave连接新的master进行复制
手工在线切换过程
1.检测集群复制设置和确定当前master
2.确定新的master
3.阻塞写入到当前master
4.等待所有slave赶上复制
5.授予写入到新的master
6.重新设置slave从新的master进行复制
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
