mysql主，MHA master节点： 10.10.10.62:3306 mysql从，MHA node节点： 10.10.10.136:3306 mysql从，MHA node节点： 10.10.10.76:3306 主从复制已经搭建好，此处不再赘述。 主库上创建mha账号 create user 'mhauser'@'10.10.10.%' identified by 'Jimstars'; grant all privileges on *.* to 'mhauser'@'10.10.10.%'; flush privileges; 配置root用户互信 在 10.10.10.62 节点生成互信文件，输入如下命令，一路回车就行 ssh-keygen cd ~/.ssh cat id_rsa.pub > authorized_keys chmod 600 * scp -r .ssh 10.10.10.136:~/ scp -r .ssh 10.10.10.76:~/ 最后每个节点都要验证，如果不用输入密码，互信就是弄好了 ssh 10.10.10.62 date ssh 10.10.10.136 date ssh 10.10.10.76 date 每个节点都要安装相关依赖包 yum install -y perl-devel yum install -y perl-CPAN yum install -y perl-Time-HiRes yum install -y perl-DBD-MySQL yum install -y perl-Params-Validate yum install -y perl-Config-Tiny yum install -y perl-Log-Dispatch yum install -y perl-Parallel-ForkManager 上述包如果yum源没有，可到 http://rpm.pbone.net/ 网站下载 MHA master节点安装 tar xf mha4mysql-node-0.56.tar.gz cd mha4mysql-node-0.56 perl Makefile.PL make && make install tar xf mha4mysql-manager-0.56.tar.gz cd mha4mysql-manager-0.56 perl Makefile.PL make && make install MHA node节点安装 tar xf mha4mysql-node-0.56.tar.gz cd mha4mysql-node-0.56 perl Makefile.PL make && make install 为MHA的相关配置信息的存放规划目录结构（3个节点均要操作）： mkdir -p /usr/local/masterha_work/{conf,manager_workdir,rmt_mysql_binlog_workdir,script_dir,log} 自定义规则： conf ，存放MHA的配置文件 log ，存放于MHA有关的日志信息 script_dir ，除了默认的存放脚本的位置外，另一个存放自定义的或者官方提供的脚本的位置 manager_workdir ，Manager的工作目录 rmt_mysql_binlog_workdir ，当发生切换的时候，MySQL的binlog的临时存放路径 修改配置目录权限： chown -R mysql:mysql /usr/local/masterha_work /etc/init.d/mhavip 内容如下 #!/bin/bash MasterVip=10.10.10.134 MasterInterface=ens160 case "$1" in start) ifconfig ${MasterInterface}:0 $MasterVip netmask 255.255.255.0 echo "MasterVip Start OK" ;; stop) ifconfig ${MasterInterface}:0 down echo "MasterVip Stoped" ;; *) echo "Usage: $0 {start|stop}" exit 1 esac exit 0 保存脚本文件后更改该文件权限： chmod 755 /etc/init.d/mhavip 在MySQL Master配置VIP，开启mhavip服务： /etc/init.d/mhavip start 注意上述 SNS_INTERFACE 变量中不同服务器上的可能不一样，需要使用ifconfig分别查看并修改 master_ip_failover脚本修改 注释掉 FIXME， 原： ## Creating an app user on the new master print "Creating app user on the new master.. "; 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 FIXME_xxx; 修改如下： ## Creating an app user on the new master print "Creating app user on the new master.. "; #FIXME_xxx_create_user( $new_master_handler->{dbh} ); $new_master_handler->enable_log_bin_local(); $new_master_handler->disconnect(); ## Update master ip on the catalog database, etc #FIXME_xxx; 在 FIXME_xxx 后面增加对 vip 的启用： `/usr/bin/ssh -t root@${orig_master_ip} "/etc/init.d/mhavip stop"`; `/usr/bin/ssh -t root@${new_master_ip} "/etc/init.d/mhavip start"`; 注意，一定要用【;】结尾，否则脚本执行会出错。 修改 new_master_handler 中 mhamhauser用户与密码 ： # args: hostname, port, user, password, raise_error_or_not #$new_master_handler->connect( $new_master_ip, $new_master_port, # $new_master_user, $new_master_password, 1 ); $new_master_handler->connect( $new_master_ip, $new_master_port, 'mhauser', 'Jimstars', 1 ); 修改后 master_ip_failover 脚本如下： cat /usr/bin/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; 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, ); 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: $@ "; 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, "mhauser", "Jimstars", 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. "; $new_master_handler->disable_read_only(); ## Creating an app user on the new master print "Creating app user on the new master.. "; #FIXME_xxx_create_user( $new_master_handler->{dbh} ); $new_master_handler->enable_log_bin_local(); $new_master_handler->disconnect(); ## Update master ip on the catalog database, etc #FIXME_xxx; `echo "script begin running..." > /usr/local/masterha_work/script_dir/master_ip_failover_run_shell`; #`/usr/bin/ssh -t root@${orig_master_ip} "service keepalived stop" > /work_dir/mha_manager/test_me/orig_master.log`; #`/usr/bin/ssh -t root@${new_master_ip} "service keepalived start" > /work_dir/mha_manager/test_me/new_master.log`; `/usr/bin/ssh -t root@${orig_master_ip} "/etc/init.d/mhavip stop"`; `/usr/bin/ssh -t root@${new_master_ip} "/etc/init.d/mhavip start"`; $exit_code = 0; }; if ($@) { 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 "; } 最后修改脚本权限： chmod 755 /usr/bin/master_ip_failover master_ip_online_change 脚本修改： 注释 FIXME_xxx_drop_app_user 原来： ## Drop application user so that nobody can connect. Disabling per-session binlog beforehand $orig_master_handler->disable_log_bin_local(); print current_time_us() . " Drpping app user on the orig master.. "; FIXME_xxx_drop_app_user($orig_master_handler); 修改如下： ## Drop application user so that nobody can connect. Disabling per-session binlog beforehand $orig_master_handler->disable_log_bin_local(); print current_time_us() . " Drpping app user on the orig master.. "; #FIXME_xxx_drop_app_user($orig_master_handler); 注释 FIXME_xxx_create_app_user 原来： ## Creating an app user on the new master print current_time_us() . " Creating app user on the new master.. "; FIXME_xxx_create_app_user($new_master_handler); $new_master_handler->enable_log_bin_local(); $new_master_handler->disconnect(); 修改如下： ## Creating an app user on the new master print current_time_us() . " Creating app user on the new master.. "; #FIXME_xxx_create_app_user($new_master_handler); $new_master_handler->enable_log_bin_local(); $new_master_handler->disconnect(); 修改 mhauser 用户的位置： 位置一： # args: hostname, port, user, password, raise_error(die_on_error)_or_not $new_master_handler->connect( $new_master_ip, $new_master_port, "mhauser", "Jimstars", 1 ); 位置二： # args: hostname, port, user, password, raise_error_or_not $new_master_handler->connect( $new_master_ip, $new_master_port, "mhauser", "Jimstars", 1 ); 增加 vip 的启动： `/usr/bin/ssh -t root@${orig_master_ip} "/etc/init.d/mhavip stop"`; `/usr/bin/ssh -t root@${new_master_ip} "/etc/init.d/mhavip start"`; /usr/local/masterha_work/script_dir/master_ip_failover_run_shell 修改后的脚本如下： cat /usr/bin/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; 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 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, "mhauser", "Jimstars", 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. "; } else { die "Failed! "; } $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 $orig_master_handler->disable_log_bin_local(); print current_time_us() . " Drpping app user on the orig master.. "; #FIXME_xxx_drop_app_user($orig_master_handler); ## 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) ", current_time_us(), $#threads + 1, $time_until_read_only * 100; if ( $#threads < 5 ) { print Data::Dumper->new( [$_] )->Indent(0)->Terse(1)->Dump . " " 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. "; } else { die "Failed! "; } ## 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) ", current_time_us(), $#threads + 1, $time_until_kill_threads * 100; if ( $#threads < 5 ) { print Data::Dumper->new( [$_] )->Indent(0)->Terse(1)->Dump . " " 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.. "; $orig_master_handler->kill_threads(@threads) if ( $#threads >= 0 ); print current_time_us() . " done. "; $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: $@ "; 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, "mhauser", "Jimstars", 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. "; $new_master_handler->disable_read_only(); ## Creating an app user on the new master print current_time_us() . " Creating app user on the new master.. "; #FIXME_xxx_create_app_user($new_master_handler); $new_master_handler->enable_log_bin_local(); $new_master_handler->disconnect(); ## Update master ip on the catalog database, etc #`/usr/bin/ssh -t root@${orig_master_ip} "service keepalived stop"`; #`/usr/bin/ssh -t root@${new_master_ip} "service keepalived start"`; `/usr/bin/ssh -t root@${orig_master_ip} "/etc/init.d/mhavip stop"`; `/usr/bin/ssh -t root@${new_master_ip} "/etc/init.d/mhavip start"`; $exit_code = 0; }; if ($@) { warn "Got Error: $@ "; 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 "; die; } 修改文件的权限： chmod 755 /usr/bin/master_ip_online_change cat /usr/local/masterha_work/conf/masterha_monitor.cnf [server default] user=mhauser password=Jimstars ssh_user=root master_binlog_dir=/data/mysql remote_workdir=/usr/local/masterha_work/rmt_mysql_binlog_workdir repl_user=repl repl_password=Jimstars master_ip_failover_script=/usr/bin/master_ip_failover master_ip_online_change_script=/usr/bin/master_ip_online_change ping_interval=30 manager_log=/usr/local/masterha_work/log/manager_monitor.log [server1] hostname=10.10.10.62 port=3306 [server2] hostname=10.10.10.136 candidate_master=1 check_repl_delay=0 port=3306 [server3] hostname=10.10.10.76 port=3306 在MHA master节点测试SSH连通性： masterha_check_ssh --conf=/usr/local/masterha_work/conf/masterha_monitor.cnf 测试MySQL复制的情况： masterha_check_repl --conf=/usr/local/masterha_work/conf/masterha_monitor.cnf MHA master节点上部署 call_do_mha.sh 脚本 cat /usr/local/masterha_work/script_dir/call_do_mha.sh # name: call_do_mha.sh #variables str_mha_app=$1 while [ true ] do sh /usr/local/masterha_work/script_dir/do_mha.sh $str_mha_app sleep 5 done MHA master节点上部署 do_mha.sh 脚本 cat /usr/local/masterha_work/script_dir/do_mha.sh #!/bin/bash # Script # Name: do_mha.sh # APP vendor: MHA # Linux vendor: RHEL / CentOS # -------------------------- # variable and file path # Part:: this script str_mha_application=$1 # Part:: Linux # Account info str_linux_username="root" # Part:: MySQL # Account info str_mysql_username="root" str_mysql_password="Jimstars" str_repl_port=3306 str_repl_username="repl" str_repl_password="Jimstars" str_ip_mha_manager="10.10.10.134" # Part:: MHA # pid str_pid_masterha_manager=`ps -ef | grep masterha_manager | grep "$str_mha_application" | grep perl | awk '{print $2}'` # file file_conf_mha_application="/usr/local/masterha_work/conf/$str_mha_application.cnf" # file: relation / by computed file_log_mha_manager=`cat $file_conf_mha_application | grep --color manager_log | cut -d'=' -f2` # variable: ip info # 如果MHA中MySQL主库的候选服务器数量超过了两台，也许下面这个list参数，就会排上用场 list_ip_candicate=`cat $file_conf_mha_application | grep -B 2 "^candidate" | grep "hostname" | cut -d'=' -f2` str_ip_orig_master=`cat $file_log_mha_manager | grep --color "MySQL Master failover" | cut -d'(' -f2 | cut -d':' -f1 | tail -n 1` str_ip_new_master=`cat $file_log_mha_manager | grep --color "MySQL Master failover" | cut -d'(' -f3 | cut -d':' -f1 | tail -n 1` # 为[change master]准备的参数 str_log_file_new_master="" str_log_pos_new_master="" # Part:: String SQL str_sql_mysql_change_master="" # -------------------------- # function function do_sql() { # variable func_str_ip="$1" func_str_sql="$2" # action # 本场景中不涉及到对MySQL某个库的操作，所以没有选择[db] # mysql -u $user -p"$password" $db -N -e "$f_sql_str" mysql -u $str_mysql_username -h $func_str_ip -p"$str_mysql_password" -N -e "$func_str_sql" -P $str_repl_port } # 获取主库状态信息 #function get_info_mysql_master_new_master() { # version ONE #str_log_file_new_master=`do_sql "$str_ip_new_master" "show master status" | awk '{print $1}'` #str_log_pos_new_master=`do_sql "$str_ip_new_master" "show master status" | awk '{print $2}'` #} # 生成orig_master作为slave加入new_master的[change master]SQL命令 function gen_sql_mysql_change_master() { func_temp_master_host_sed=`cat $file_log_mha_manager | grep --color "All other slaves should start" | tail -n 1 | cut -d',' -f1 | cut -d'=' -f2 | cut -d' -f2` func_temp_repl_password_sed=`cat $file_log_mha_manager | grep --color "All other slaves should start" | tail -n 1 | rev | cut -d' -f2` echo "======================" echo "@@ func variable: func_temp_repl_password_sed = $func_temp_repl_password_sed" echo "======================" str_sql_mysql_change_master=`cat $file_log_mha_manager | grep --color "All other slaves should start" | tail -n 1 | sed "s#${func_temp_repl_password_sed}#${str_repl_password}#g" | cut -d':' -f4` str_sql_mysql_change_master=`echo $str_sql_mysql_change_master | sed "s#${func_temp_master_host_sed}#${str_ip_new_master}#g"` } # 对指定主机执行Linux命令 # 前提： # 1. IP可达 # 2. SSH等价关系 function do_linux_by_ssh() { # variable func_str_ip="$1" func_str_user="$2" func_str_command="$3" # action # ssh -t $func_str_user@$func_str_ip "$func_str_command" ssh -t -t $func_str_user@$func_str_ip "$func_str_command" } # 处理VIP的事宜 function do_part_vip() { do_linux_by_ssh "$str_ip_new_master" "root" "service keepalived start" do_linux_by_ssh "$str_ip_orig_master" "root" "service keepalived stop" } function do_part_orig_master_is_new_slave() { do_linux_by_ssh "$str_ip_orig_master" "root" "service mysqld start" do_sql "$str_ip_orig_master" "set global read_only=1;" do_sql "$str_ip_orig_master" "$str_sql_mysql_change_master" do_sql "$str_ip_orig_master" "start slave;" } function do_part_mha_master_manager_start() { do_linux_by_ssh "$str_ip_mha_manager" "root" "nohup masterha_manager --conf=$file_conf_mha_application --ignore_last_failover &" } # 如果PID不存在，则执行该脚本，否则，退出 function runable_by_mha_manager_pid() { echo "-----------------" echo "Script for MySQL Master HA" echo "-----------------" echo "Begin:: "`date "+|%Y-%m-%d|%H:%M:%S|"` if [[ "$str_pid_masterha_manager" == "" ]] then echo "## masterha_manager is [NOT ALIVED]." else echo "## masterha_manager is [ALIVED]." echo "[masterha_manager] PID is:: $str_pid_masterha_manager" # do something. echo "## Exit Script" exit 0 fi } # -------------------------- # action # 如果PID不存在，则执行该脚本，否则，退出 echo "------------------" echo "app: runable_by_mha_manager_pid" runable_by_mha_manager_pid echo "" echo "------------------" echo "app: gen_sql_mysql_change_master" gen_sql_mysql_change_master echo "" echo "------------------" echo "app: do_part_orig_master_is_new_slave" do_part_orig_master_is_new_slave echo "" echo "------------------" echo "app: do_part_mha_master_manager_start" #do_part_mha_master_manager_start nohup masterha_manager --conf=$file_conf_mha_application --ignore_last_failover > /usr/local/masterha_work/log/mha_manager.log 2>&1& echo "" # -------------------------- # Show time echo "=================" echo "MySQL info:" echo "## Account and Password" echo "username @ $str_mysql_username" echo "password @ $str_mysql_password" echo "--- for REPLICATION ---" echo "repl @ username ## $str_repl_username" echo "repl @ password ## $str_repl_password" echo "## Master Server info" echo "log file @ Master ## $str_log_file_new_master" echo "log pos @ Master ## $str_log_pos_new_master" echo "" echo "=================" echo "SQL statement:" echo "[CHANGE MASTER] -->" echo "$str_sql_mysql_change_master" echo "" echo "=================" echo "MasterHA info:" echo "## File and Path" echo "MHA Global config file @ $file_conf_mha_global" echo "MHA Application config file @ $file_conf_mha_application" echo "MHA Log file:: masterha_manager @ $file_log_mha_manager" echo "## Architecture" echo "Candicate Server list::" echo "$list_ip_candicate" echo "## IP" echo "MHA Manager Server:: $str_ip_mha_manager" echo "Last:: new master:: $str_ip_new_master" echo "Last:: orig master:: $str_ip_orig_master" echo "" # -------------------------- echo "-----------------" echo "Finished:: "`date "+|%Y-%m-%d|%H:%M:%S|"` # Done 启动 mha守护进程 nohup masterha_manager --conf=/usr/local/masterha_work/conf/masterha_monitor.cnf --ignore_last_failover > /usr/local/masterha_work/log/mha_manager.log 2>&1& 启动 call_do_mha.sh 脚本 nohup sh /usr/local/masterha_work/script_dir/call_do_mha.sh masterha_monitor > /usr/local/masterha_work/log/call_do_mha.log 2>&1& 检查启动的状态 masterha_check_status --conf=/usr/local/masterha_work/conf/masterha_monitor.cnf 停止mha masterha_stop --conf=/usr/local/masterha_work/conf/masterha_monitor.cnf