有时候，可能出现这样的情况：
1. MySQL复制的主从机器位于不同的网段
这种情况下，如果使用Keepalive做VIP资源，则可能出现主从两边VIP都启动的情况，正确的情况下VIP应该只能在其中一端活跃。
这种情况下，就可以通过自定义脚本去解决该场景下的问题。
这一次的代码更新，也发布到了Github上：
https://github.com/adamhuan/linux-script/tree/master/MySQL/MySQL%20MasterHA_%E5%A2%9E%E5%BC%BA
以下是我对之前自己写的 针对MHA架构的 自定义脚本变更后的样子：
文件：do_mha.sh
#!/bin/bash
# Script Name: MySQL_MHA_Enhance_shell.sh
# About: auto register in MySQL Replication
# Script Type: Bash Shell
# OS: RHEL6 / CentOS6
# Architecture: MySQL MasterHA
# Auther: adamhuan
# Blog: d-prototype.com
# --------------------------
# variable and file path
# Part:: this script
str_mha_application=$1
# Part:: Linux
# Account info
str_linux_username="root" #不同的环境，一定要注意的参数
# Part:: MySQL
# Account info
str_mysql_username="root" #不同的环境，一定要注意的参数
str_mysql_password=Abcd1@34 #不同的环境，一定要注意的参数
str_repl_username="replme" #不同的环境，一定要注意的参数
str_repl_password=Or@cle123 #不同的环境，一定要注意的参数
# Part:: MHA
# pid
#str_pid_masterha_manager=`ps -ef | grep masterha_manager | grep perl | awk '{print $2}'`
str_pid_masterha_manager=`ps -ef | grep masterha_manager | grep "$str_mha_application" | grep perl | awk '{print $2}'`
# file
file_conf_mha_global="/etc/masterha_default.cnf"
path_conf_mha_application="/etc" #不同的环境，一定要注意的参数
#file_conf_mha_application="/etc/masterha_application_1.cnf"
file_conf_mha_application="$path_conf_mha_application/$str_mha_application.cnf" #不同的环境，一定要注意的参数
# 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 $file_log_mha_manager | grep --color "MySQL Master failover" | cut -d'(' -f3 | cut -d':' -f1 | tail -n 1`
str_ip_mha_manager="10.158.1.94" #不同的环境，一定要注意的参数
str_mysql_port="3306" #不同的环境，一定要注意的参数
path_file_mha_application_log_dir="/script/log" #不同的环境，一定要注意的参数
path_file_mha_application_log_file="$path_file_mha_application_log_dir/$str_mha_application.log"
# 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" -P$str_mysql_port -N -e "$func_str_sql"
}
# 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 $2}'`
#}
# 生成orig_master作为slave加入new_master的[change master]SQL命令
function gen_sql_mysql_change_master() {
#if [[ "$str_log_file_new_master" == "" || $str_log_pos_new_master == "" ]]
#then
# get_info_mysql_master_new_master
#fi
#str_sql_mysql_change_master="CHANGE MASTER TO MASTER_HOST='$str_ip_new_master',MASTER_USER='$str_repl_username',MASTER_PASSWORD='$str_repl_password',MASTER_LOG_FILE='$str_log_file_new_master',MASTER_LOG_POS=$str_log_pos_new_master;"
# version TWO
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`
func_temp_master_binlog_file=`cat $file_log_mha_manager | grep --color "All other slaves should start" | tail -n 1 | cut -d',' -f3 | cut -d'=' -f2 | cut -d\' -f2`
func_temp_master_binlog_pos=`cat $file_log_mha_manager | grep --color "All other slaves should start" | tail -n 1 | cut -d',' -f4 | cut -d'=' -f2 | cut -d\' -f2`
echo "======================"
echo "@@ func variable: func_temp_master_host_sed = $func_temp_master_host_sed"
echo "@@ func variable: func_temp_repl_password_sed = $func_temp_repl_password_sed"
echo "@@ func variable: func_temp_master_binlog_file = $func_temp_master_binlog_file"
echo "@@ func variable: func_temp_master_binlog_pos = $func_temp_master_binlog_pos"
echo "======================"
str_log_file_new_master=$func_temp_master_binlog_file
str_log_pos_new_master=$func_temp_master_binlog_pos
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 "$func_str_command"
}
# 处理VIP的事宜
function do_part_vip() {
do_linux_by_ssh "$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 mysql 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() {
echo "func: do_part_mha_master_manager_start --->"
echo "Special log file is: $path_file_mha_application_log_file"
do_linux_by_ssh "$str_ip_mha_manager" "root" "nohup masterha_manager --conf=$file_conf_mha_application --ignore_last_failover < /dev/null > $path_file_mha_application_log_file 2>&1 &"
}
function check_repl() {
# variable
func_str_block_status=""
# version 1
#func_str_block_status=`masterha_check_repl --conf=$file_conf_mha_application`
# version 2
#masterha_check_repl --conf=$file_conf_mha_application > $func_str_block_status
# version 3
func_str_block_status=$(masterha_check_repl --conf=$file_conf_mha_application)
repl_status=`echo "$func_str_block_status" | grep --color "(current master)"`
echo "------------------"
echo "fun: check_repl"
echo ""
echo "$func_str_block_status"
echo ""
}
# 如果PID不存在，则执行该脚本，否则，退出
function runable_by_mha_manager_pid() {
echo "-----------------"
echo "Script for MySQL Master HA"
echo "-----------------"
echo "Begin:: "`date "+|%Y-%m-%d|%H:%M:%S|"`
#echo "========================"
#echo "current MySQL REPL is::"
#check_repl
#echo "========================"
if [[ "$str_pid_masterha_manager" == "" ]]
then
echo "## masterha_manager is [NOT ALIVED]."
else
echo "## masterha_manager is [ALIVED]."
echo "[masterha_manager] PID is:: $str_pid_masterha_manager"
# do something.
echo "## Exit Script"
exit 0
fi
}
# --------------------------
# action
# 如果PID不存在，则执行该脚本，否则，退出
echo "------------------"
echo "app: runable_by_mha_manager_pid"
runable_by_mha_manager_pid
echo ""
echo "------------------"
echo "app: gen_sql_mysql_change_master"
gen_sql_mysql_change_master
echo ""
#echo "------------------"
#echo "app: do_part_vip"
#do_part_vip
#echo ""
echo "------------------"
echo "app: do_part_orig_master_is_new_slave"
do_part_orig_master_is_new_slave
echo ""
echo "------------------"
echo "app: do_part_mha_master_manager_start"
#do_part_mha_master_manager_start
# version 1
#nohup masterha_manager --conf=$file_conf_mha_application --ignore_last_failover &
# version 2
echo "Special log file is: $path_file_mha_application_log_file"
nohup masterha_manager --conf=$file_conf_mha_application --ignore_last_failover < /dev/null >> $path_file_mha_application_log_file 2>&1 &
echo ""
# --------------------------
# Show time
# ---------
# version one
# ---------
#echo "new master is:: $str_ip_new_master"
#echo "Master log file is:: $str_log_file_new_master"
#echo "Master log POS is:: $str_log_pos_new_master"
#echo "orig master --> new master ## SQL: CHANGE MASTER ## is:: $str_sql_mysql_change_master"
# ---------
# version two
# ---------
echo "================="
echo "MySQL info:"
echo "## Account and Password"
echo "username @ $str_mysql_username"
echo "password @ $str_mysql_password"
echo ""
echo "--- for REPLICATION ---"
echo "repl @ username ## $str_repl_username"
echo "repl @ password ## $str_repl_password"
echo ""
echo "## Master Server info"
#version 1
#echo "log file @ Master ## $str_log_file_new_master"
#echo "log pos @ Master ## $str_log_pos_new_master"
#version 2
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 @ $file_log_mha_manager"
echo ""
echo "## Architecture"
echo "Candicate Server list::"
echo "$list_ip_candicate"
echo ""
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
文件：call_do_mha.sh
该脚本没有变动，和之前一样。
文件：master_ip_online_change
该脚本之前依赖KEEPALIVE，在当前的版本中，已经改为依赖专门处理VIP资源的启停脚本了。
#!/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,
"root", "Abcd1\@34", 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
$orig_master_handler->disable_log_bin_local();
print current_time_us() . " Drpping app user on the orig master..\n";
#FIXME_xxx_drop_app_user($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)\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,
"root", "Abcd1\@34", 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";
$new_master_handler->disable_read_only();
## Creating an app user on the new master
print current_time_us() . " Creating app user on the new master..\n";
#FIXME_xxx_create_app_user($new_master_handler);
$new_master_handler->enable_log_bin_local();
$new_master_handler->disconnect();
## Update master ip on the catalog database, etc
# version 1
#`/usr/bin/ssh -t root\@${orig_master_ip} "service keepalived stop"`;
#`/usr/bin/ssh -t root\@${new_master_ip} "service keepalived start"`;
# version 2
`/usr/bin/ssh -t root\@${orig_master_ip} "/script/shell/do_vip_crontab.sh 1 0"`;
`/usr/bin/ssh -t root\@${new_master_ip} "/script/shell/do_vip_crontab.sh 0 1"`;
$exit_code = 0;
};
if ($@) {
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;
}
文件：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: $@\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,
"mhame", "Or\@cle123", 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();
$new_master_handler->disconnect();
## Update master ip on the catalog database, etc
#FIXME_xxx;
`echo "script begin running..." > /work_dir/mha_manager/test_me/master_ip_failover_run_shell`;
# version 1
#`/usr/bin/ssh -t root\@${orig_master_ip} "service keepalived stop" > /work_dir/mha_manager/test_me/orig_master.log`;
#`/usr/bin/ssh -t root\@${new_master_ip} "service keepalived start" > /work_dir/mha_manager/test_me/new_master.log`;
#version 2
`/usr/bin/ssh -t root\@${orig_master_ip} "/script/shell/do_vip_crontab.sh 1 0" > /work_dir/mha_manager/test_me/orig_master.log`;
`/usr/bin/ssh -t root\@${new_master_ip} "/script/shell/do_vip_crontab.sh 0 1" > /work_dir/mha_manager/test_me/new_master.log`;
`sh /script/shell/do_mha.sh > /work_dir/mha_manager/test_me/do_mha.log`;
$exit_code = 0;
};
if ($@) {
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";
}
文件：do_vip_and_cron.sh
用来处理VIP资源，以及只希望在【从主】节点上执行计划任务的诉求。
# file: do_vip_and_crontab.sh
# 职能：
# --> 1. 启动或停止：虚拟IP
# --> 2. 启用或禁用：crontab策略
# variable
# ---> 信号量
# 对于所有信号而言：
# 0，启用
# 1，禁用
#是否启用：VIP
#sign_vip=0
sign_vip="$1"
# 是否启用：crontab
#sign_crontab=0
sign_crontab="$2"
# 对于VIP而言
str_vip="10.158.1.111"
str_mask="255.255.255.0"
str_nic_name="eth0:0"
# 对于CRONTAB而言
# for RHEL6
# 如果是root用户，就会在：/var/spool/cron/root
file_crontab_dir="/var/spool/cron"
file_crontab_conf="$file_crontab_dir/root"
str_crontab_command="data +%Y-%m-%d"
str_crontab_date="10 11 * * *"
str_crontab_date_sed=`echo "$str_crontab_date" | sed 's/*/\\\*/g'`
str_crontab_full="$str_crontab_date $str_crontab_command"
str_crontab_full_sed="$str_crontab_date_sed $str_crontab_command"
str_block_crontab_content=`cat $file_crontab_conf | grep -v '#'`
# disable
echo "Crontab content:"
echo "$str_block_crontab_content"
echo ""
echo "var: str_crontab_full --> $str_crontab_full"
echo "var: str_crontab_date_sed --> $str_crontab_date_sed"
echo "var: str_crontab_full_sed --> $str_crontab_full_sed"
echo ""
# running
if [ $sign_vip -eq "0" ]
then
echo "------------"
echo "VIP:: enable."
ifconfig $str_nic_name $str_vip netmask $str_mask up
echo ""
else
echo "------------"
echo "VIP:: disable."
ifconfig $str_nic_name $str_vip netmask $str_mask down
echo ""
fi
if [ $sign_crontab -eq "0" ]
then
echo "------------"
echo "CRONTAB:: enable."
if [[ $str_block_crontab_content =~ "$str_crontab_full" ]]
then
echo "CRONTAB Policy is in [$file_crontab_conf]"
else
echo "CRONTAB Policy is not in [$file_crontab_conf]"
echo "Put it in, ..."
echo "$str_crontab_full" >> $file_crontab_conf
echo "Done."
fi
echo ""
else
echo "------------"
echo "CRONTAB:: disable."
if [[ $str_block_crontab_content =~ "$str_crontab_full" ]]
then
echo "CRONTAB Policy is in [$file_crontab_conf]"
echo "change it, ..."
sed -i "s/$str_crontab_full_sed/#$str_crontab_full_sed/g" $file_crontab_conf
echo "Done."
else
echo "CRONTAB Policy is not in [$file_crontab_conf]"
fi
echo ""
fi
# Finished
启动方式还是和之前一样，但是VIP的资源部分已经完全不一样了。
上述脚本的参数可以根据自己的环境的不同做出相应的修改。
——————————————————————————
Done。