也可以通过https://download.csdn.net/download/xxzhaobb/11151222下载 。
1 软硬件基本信息
|
OS |
Hostname |
IP |
主/从 |
备注 |
|
Redhat 7.4 |
Mysql1 |
192.168.54.230 |
从 |
管理节点 |
|
Redhat 7.4 |
Mysql2 |
192.168.54.231/233 |
主 |
VIP 地址233 |
|
Redhat 7.4 |
Mysql3 |
192.168.54.232 |
从 |
|
2 解压并安装mysql
MySQL版本mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz
在安装mysql之前创建MySQL用户，关闭防火墙，因为是解压后进行安装，需要安装包numactl。
2.1创建MySQL 用户
groupadd mysql
useradd -d /home/mysql -g mysql -m mysql
passwd mysql
mkdir -p /mysql/mysql/data
2.2 关闭防火墙
systemctl status firewalld
systemctl stop firewalld
systemctl disable firewalld
systemctl is-enabled firewalld.service
2.3 安装mysql所需要的包
yum install numactl
2.4 安装mysql ，注意在安装之前，配置好my.cnf文件
[root@mysql2 bin]# ./mysqld --initialize-insecure --user=mysql --basedir=/mysql/mysql --datadir=/mysql/mysql/data
2.5 添加mysql服务
先移除/etc/my.cnf文件，或重命名也可以。
添加mysql服务
cd /mysql/mysql/support-files/
cp mysql.server /etc/init.d/mysql
编辑mysql里面的datadir，basedir
Vi /etc/init.d/mysql
以上操作，在三个节点上都操作。
3 搭建mysql 主从 ，一主二从的架构 。
3.1 在所有的Mysql上创建复制账号
create user 'rep1'@'192.168.54.%' identified by 'mysql';
grant replication slave on *.* to 'rep1'@'192.168.54.%';
flush privileges;
3.2 编辑各个Mysql的my.cnf配置文件，做测试用，里面参数较少，生产环境再根据情况添加参数。
[mysqld]
server_id=3
relay-log-index=slave-relay-bin.index
relay-log=slave-relay-bin
port=3306
character_set_server=utf8
basedir=/mysql/mysql
datadir=/mysql/mysql/data
log-bin=mysql1-bin
gtid_mode=on
enforce-gtid-consistency=true
log-slave-updates=true
[mysqld]
server_id=1
log_bin=master-bin
log_bin-index=master-bin.index
port=3306
character_set_server=utf8
basedir=/mysql/mysql
datadir=/mysql/mysql/data
socket=/tmp/mysql.sock
log-bin=mysql2-bin
gtid_mode=on
enforce-gtid-consistency=true
log-slave-updates=true
[mysqld]
server_id=2
relay-log-index=slave-relay-bin.index
relay-log=slave-relay-bin
port=3306
character_set_server=utf8
basedir=/mysql/mysql
datadir=/mysql/mysql/data
log-bin=mysql3-bin
gtid_mode=on
enforce-gtid-consistency=true
log-slave-updates=true
3.3 开启mysql的半同步复制
INSTALL PLUGIN rpl_semi_sync_master SONAME 'semisync_master.so';
SET GLOBAL rpl_semi_sync_master_enabled=ON；
3.4 开启主从同步，再各个从库上执行
change master to master_host='192.168.54.231',master_user='rep1',master_password='mysql',master_auto_position=1;
3.5 启动从库，并查看主从状态，确保Slave_IO_Running和Slave_SQL_Running为Yes。
Start slave；
Show master status ;
Show slave status \G;
4 安装MHA
4.1 配置SSH互信
mkdir ~/.ssh
chmod 700 ~/.ssh
cd ~/.ssh
ssh-keygen -t rsa #一直回车
ls -al
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
ls -al
chmod 600 ~/.ssh/authorized_keys
然后，将三个节点上的authorized_keys文件内容合并为一个文件。并且相互ssh，不需要输入密码的时候，说明ssh互信配置成功
Ssh mysql1
Ssh mysql2
Ssh mysql3
4.2 安装包，在三个节点上安装所需的包，软件包OS自带的光盘上有。
yum install perl-DBD-MySQL
yum install perl-DBI
yum install mysql-libs
4.3 在三个节点上安装node，如果缺少包，OS光盘上通过yum安装即可。
tar xzvf mha4mysql-node-0.58.tar.gz
cd mha4mysql-node-0.58
perl Makefile.PL
make && make install
4.4 在管理节点上安装包
yum install perl-Config-Tiny-2.14-7.el7.noarch.rpm
yum install perl-Email-Date-Format-1.002-15.el7.noarch.rpm
yum install perl-File-Remove-1.52-6.el7.noarch.rpm
yum install perl-Log-Dispatch-2.41-1.el7.1.noarch.rpm
yum install perl-Mail-Sender-0.8.23-1.el7.noarch.rpm
yum install perl-Mail-Sendmail-0.79-21.el7.noarch.rpm
yum install perl-MIME-Lite-3.030-1.el7.noarch.rpm
yum install perl-MIME-Types-1.38-2.el7.noarch.rpm
yum install perl-Module-Install-1.06-4.el7.noarch.rpm
yum install perl-Module-ScanDeps-1.10-3.el7.noarch.rpm
yum install perl-Parallel-ForkManager-1.18-2.el7.noarch.rpm
yum install perl-YAML-0.84-5.el7.noarch.rpm
4.5 安装管理节点 ，如果提示缺少包，OS光盘上通过yum安装即可。
tar xzvf mha4mysql-manager-0.58.tar.gz
cd mha4mysql-manager-0.58
perl Makefile.PL
make && make install
4.6 配置MHA脚本，在管理节点上
Mkdir -p /usr/local/mha
Vi mha.conf
[server default]
user = root
password = mysql
ssh_user = root
repl_user = rep1
repl_password = mysql
ping_interval = 1
ping_type = SELECT
manager_workdir=/usr/local/mha
manager_log=/usr/local/mha/manager.log
remote_workdir=/usr/local/mha
##--master_binlog_dir="/u01/my3306/log/binlog"
master_ip_failover_script="/usr/local/scripts/master_ip_failover"
##--master_ip_online_change_script="/mysql/mha/scripts/master_ip_failover"
master_ip_online_change_script="/usr/local/scripts/master_ip_online_change"
shutdown_script=""
report_script=""
#check_repl_delay=0
[server1]
hostname=mysql1
port=3306
master_binlog_dir="/mysql/mysql/data"
no_master=1
[server2]
hostname=mysql2
port=3306
master_binlog_dir="/mysql/mysql/data"
candidate_master=1
[server3]
hostname=mysql3
port=3306
master_binlog_dir="/mysql/mysql/data"
candidate_master=1
4.7 配置failover 和onlinechange脚本
#!/usr/bin/env perl
use strict;
use warnings FATAL => 'all';
use Getopt::Long;
my (
$command, $ssh_user, $orig_master_host, $orig_master_ip,
$orig_master_port, $new_master_host, $new_master_ip, $new_master_port
);
my $vip = '192.168.54.233/24'; # Virtual IP
my $key = "1";
my $int = "ens192";
my $ssh_start_vip = "/sbin/ifconfig $int:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig $int:$key down";
my $arp_effect = "/sbin/arping -Uq -s192.168.54.233 -I $int 192.168.54.254 -c 3"; # Virtual IP and gatway
#my $test = "echo successfull >/tmp/test.txt";
$ssh_user = "root";
GetOptions(
'command=s' => \$command,
'ssh_user=s' => \$ssh_user,
'orig_master_host=s' => \$orig_master_host,
'orig_master_ip=s' => \$orig_master_ip,
'orig_master_port=i' => \$orig_master_port,
'new_master_host=s' => \$new_master_host,
'new_master_ip=s' => \$new_master_ip,
'new_master_port=i' => \$new_master_port,
);
exit &main();
sub main {
print "\n\nIN SCRIPT TEST====$ssh_stop_vip==$ssh_start_vip===\n\n";
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 {
print "Disabling the VIP on old master: $orig_master_host \n";
&stop_vip();
$exit_code = 0;
};
if ($@) {
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 {
print "Enabling the VIP - $vip on the new master - $new_master_host \n";
&start_vip();
$exit_code = 0;
};
if ($@) {
warn $@;
exit $exit_code;
}
exit $exit_code;
}
elsif ( $command eq "status" ) {
print "Checking the Status of the script.. OK \n";
#`ssh $ssh_user\@cluster1 \" $ssh_start_vip \"`;
&status();
exit 0;
}
else {
&usage();
exit 1;
}
}
# A simple system call that enable the VIP on the new master
sub start_vip() {
`ssh $ssh_user\@$new_master_host \" $ssh_start_vip \"`;
`ssh $ssh_user\@$new_master_host \" $arp_effect \"`;
# `ssh $ssh_user\@$new_master_host \" $test \"`;
}
# A simple system call that disable the VIP on the old_master
sub stop_vip() {
`ssh $ssh_user\@$orig_master_host \" $ssh_stop_vip \"`;
}
sub status() {
print `ssh $ssh_user\@$orig_master_host \" ip add show $int \"`;
}
sub usage {
print
"Usage: master_ip_failover --command=start|stop|stopssh|status --orig_master_host=host --orig_maste
r_ip=ip --orig_master_port=port --new_master_host=host --new_master_ip=ip --new_master_port=port\n";
}
#!/usr/bin/env perl
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 $vip = "192.168.54.233";
my $if = "ens192";
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`;
}
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;
}
4.8 检查状态
masterha_check_ssh --conf=/usr/local/mha/mha.conf
masterha_check_repl --conf=/usr/local/mha/mha.conf
[root@mysql1 bin]# masterha_check_ssh --conf=/usr/local/mha/mha.conf
Sun Apr 28 10:14:21 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sun Apr 28 10:14:21 2019 - [info] Reading application default configuration from /usr/local/mha/mha.conf..
Sun Apr 28 10:14:21 2019 - [info] Reading server configuration from /usr/local/mha/mha.conf..
Sun Apr 28 10:14:21 2019 - [info] Starting SSH connection tests..
Sun Apr 28 10:14:22 2019 - [debug]
Sun Apr 28 10:14:21 2019 - [debug] Connecting via SSH from root@mysql1(192.168.54.230:22) to root@mysql2(192.168.54.231:22)..
Sun Apr 28 10:14:21 2019 - [debug] ok.
Sun Apr 28 10:14:21 2019 - [debug] Connecting via SSH from root@mysql1(192.168.54.230:22) to root@mysql3(192.168.54.232:22)..
Sun Apr 28 10:14:22 2019 - [debug] ok.
Sun Apr 28 10:14:23 2019 - [debug]
Sun Apr 28 10:14:22 2019 - [debug] Connecting via SSH from root@mysql3(192.168.54.232:22) to root@mysql1(192.168.54.230:22)..
Sun Apr 28 10:14:22 2019 - [debug] ok.
Sun Apr 28 10:14:22 2019 - [debug] Connecting via SSH from root@mysql3(192.168.54.232:22) to root@mysql2(192.168.54.231:22)..
Sun Apr 28 10:14:23 2019 - [debug] ok.
Sun Apr 28 10:14:23 2019 - [debug]
Sun Apr 28 10:14:21 2019 - [debug] Connecting via SSH from root@mysql2(192.168.54.231:22) to root@mysql1(192.168.54.230:22)..
Sun Apr 28 10:14:22 2019 - [debug] ok.
Sun Apr 28 10:14:22 2019 - [debug] Connecting via SSH from root@mysql2(192.168.54.231:22) to root@mysql3(192.168.54.232:22)..
Sun Apr 28 10:14:23 2019 - [debug] ok.
Sun Apr 28 10:14:23 2019 - [info] All SSH connection tests passed successfully.
[root@mysql1 mha]# masterha_check_repl --conf=/usr/local/mha/mha.conf
Sun Apr 28 14:45:49 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Sun Apr 28 14:45:49 2019 - [info] Reading application default configuration from /usr/local/mha/mha.conf..
Sun Apr 28 14:45:49 2019 - [info] Reading server configuration from /usr/local/mha/mha.conf..
Sun Apr 28 14:45:49 2019 - [info] MHA::MasterMonitor version 0.58.
Sun Apr 28 14:45:50 2019 - [info] GTID failover mode = 0
Sun Apr 28 14:45:50 2019 - [info] Dead Servers:
Sun Apr 28 14:45:50 2019 - [info] Alive Servers:
Sun Apr 28 14:45:50 2019 - [info] mysql1(192.168.54.230:3306)
Sun Apr 28 14:45:50 2019 - [info] mysql2(192.168.54.231:3306)
Sun Apr 28 14:45:50 2019 - [info] mysql3(192.168.54.232:3306)
Sun Apr 28 14:45:50 2019 - [info] Alive Slaves:
Sun Apr 28 14:45:50 2019 - [info] mysql1(192.168.54.230:3306) Version=5.7.25-log (oldest major version between slaves) log-bin:enabled
Sun Apr 28 14:45:50 2019 - [info] Replicating from 192.168.54.231(192.168.54.231:3306)
Sun Apr 28 14:45:50 2019 - [info] Not candidate for the new Master (no_master is set)
Sun Apr 28 14:45:50 2019 - [info] mysql3(192.168.54.232:3306) Version=5.7.25-log (oldest major version between slaves) log-bin:enabled
Sun Apr 28 14:45:50 2019 - [info] Replicating from 192.168.54.231(192.168.54.231:3306)
Sun Apr 28 14:45:50 2019 - [info] Primary candidate for the new Master (candidate_master is set)
Sun Apr 28 14:45:50 2019 - [info] Current Alive Master: mysql2(192.168.54.231:3306)
Sun Apr 28 14:45:50 2019 - [info] Checking slave configurations..
Sun Apr 28 14:45:50 2019 - [info] read_only=1 is not set on slave mysql1(192.168.54.230:3306).
Sun Apr 28 14:45:50 2019 - [warning] relay_log_purge=0 is not set on slave mysql1(192.168.54.230:3306).
Sun Apr 28 14:45:50 2019 - [info] read_only=1 is not set on slave mysql3(192.168.54.232:3306).
Sun Apr 28 14:45:50 2019 - [warning] relay_log_purge=0 is not set on slave mysql3(192.168.54.232:3306).
Sun Apr 28 14:45:50 2019 - [info] Checking replication filtering settings..
Sun Apr 28 14:45:50 2019 - [info] binlog_do_db= , binlog_ignore_db=
Sun Apr 28 14:45:50 2019 - [info] Replication filtering check ok.
Sun Apr 28 14:45:50 2019 - [info] GTID (with auto-pos) is not supported
Sun Apr 28 14:45:50 2019 - [info] Starting SSH connection tests..
Sun Apr 28 14:45:52 2019 - [info] All SSH connection tests passed successfully.
Sun Apr 28 14:45:52 2019 - [info] Checking MHA Node version..
Sun Apr 28 14:45:53 2019 - [info] Version check ok.
Sun Apr 28 14:45:53 2019 - [info] Checking SSH publickey authentication settings on the current master..
Sun Apr 28 14:45:54 2019 - [info] HealthCheck: SSH to mysql2 is reachable.
Sun Apr 28 14:45:54 2019 - [info] Master MHA Node version is 0.58.
Sun Apr 28 14:45:54 2019 - [info] Checking recovery script configurations on mysql2(192.168.54.231:3306)..
Sun Apr 28 14:45:54 2019 - [info] Executing command: save_binary_logs --command=test --start_pos=4 --binlog_dir=/mysql/mysql/data --output_file=/usr/local/mha/save_binary_logs_test --manager_version=0.58 --start_file=mysql2-bin.000001
Sun Apr 28 14:45:54 2019 - [info] Connecting to root@192.168.54.231(mysql2:22)..
Creating /usr/local/mha if not exists.. ok.
Checking output directory is accessible or not..
ok.
Binlog found at /mysql/mysql/data, up to mysql2-bin.000001
Sun Apr 28 14:45:54 2019 - [info] Binlog setting check done.
Sun Apr 28 14:45:54 2019 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers..
Sun Apr 28 14:45:54 2019 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=mysql1 --slave_ip=192.168.54.230 --slave_port=3306 --workdir=/usr/local/mha --target_version=5.7.25-log --manager_version=0.58 --relay_log_info=/mysql/mysql/data/relay-log.info --relay_dir=/mysql/mysql/data/ --slave_pass=xxx
Sun Apr 28 14:45:54 2019 - [info] Connecting to root@192.168.54.230(mysql1:22)..
Checking slave recovery environment settings..
Opening /mysql/mysql/data/relay-log.info ... ok.
Relay log found at /mysql/mysql/data, up to slave-relay-bin.000007
Temporary relay log file is /mysql/mysql/data/slave-relay-bin.000007
Checking if super_read_only is defined and turned on.. not present or turned off, ignoring.
Testing mysql connection and privileges..
mysql: [Warning] Using a password on the command line interface can be insecure.
done.
Testing mysqlbinlog output.. done.
Cleaning up test file(s).. done.
Sun Apr 28 14:45:55 2019 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=mysql3 --slave_ip=192.168.54.232 --slave_port=3306 --workdir=/usr/local/mha --target_version=5.7.25-log --manager_version=0.58 --relay_log_info=/mysql/mysql/data/relay-log.info --relay_dir=/mysql/mysql/data/ --slave_pass=xxx
Sun Apr 28 14:45:55 2019 - [info] Connecting to root@192.168.54.232(mysql3:22)..
Checking slave recovery environment settings..
Opening /mysql/mysql/data/relay-log.info ... ok.
Relay log found at /mysql/mysql/data, up to slave-relay-bin.000006
Temporary relay log file is /mysql/mysql/data/slave-relay-bin.000006
Checking if super_read_only is defined and turned on.. not present or turned off, ignoring.
Testing mysql connection and privileges..
mysql: [Warning] Using a password on the command line interface can be insecure.
done.
Testing mysqlbinlog output.. done.
Cleaning up test file(s).. done.
Sun Apr 28 14:45:55 2019 - [info] Slaves settings check done.
Sun Apr 28 14:45:55 2019 - [info]
mysql2(192.168.54.231:3306) (current master)
+--mysql1(192.168.54.230:3306)
+--mysql3(192.168.54.232:3306)
Sun Apr 28 14:45:55 2019 - [info] Checking replication health on mysql1..
Sun Apr 28 14:45:55 2019 - [info] ok.
Sun Apr 28 14:45:55 2019 - [info] Checking replication health on mysql3..
Sun Apr 28 14:45:55 2019 - [info] ok.
Sun Apr 28 14:45:55 2019 - [info] Checking master_ip_failover_script status:
Sun Apr 28 14:45:55 2019 - [info] /usr/local/scripts/master_ip_failover --command=status --ssh_user=root --orig_master_host=mysql2 --orig_master_ip=192.168.54.231 --orig_master_port=3306
IN SCRIPT TEST====/sbin/ifconfig ens192:1 down==/sbin/ifconfig ens192:1 192.168.54.233/24===
Checking the Status of the script.. OK
2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 00:50:56:9e:56:39 brd ff:ff:ff:ff:ff:ff
inet 192.168.54.231/24 brd 192.168.54.255 scope global ens192
valid_lft forever preferred_lft forever
inet6 fe80::7657:5bdf:3e45:94ab/64 scope link
valid_lft forever preferred_lft forever
Sun Apr 28 14:45:56 2019 - [info] OK.
Sun Apr 28 14:45:56 2019 - [warning] shutdown_script is not defined.
Sun Apr 28 14:45:56 2019 - [info] Got exit code 0 (Not master dead).
MySQL Replication Health is OK.
4.9 添加VIP
在主库上添加VIP地址
ip addr add 192.168.54.233/24 dev ens192
5 MHA启动与测试
5.1 启动MHA服务
masterha_manager --conf=/usr/local/mha/mha.conf > /tmp/mha_manager.log < /dev/null 2>&1 &
5.2 验证MHA状态
masterha_check_status --conf=/usr/local/mha/mha.conf
5.3 故障模拟，关闭掉主库，从库会自动转换为主库并获取VIP地址
-- 关闭掉主库，并查看状态 ，mysql3 变成了新的主库
mysql> show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.54.231
Master_User: rep1
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql2-bin.000001
Read_Master_Log_Pos: 154
Relay_Log_File: slave-relay-bin.000007
Relay_Log_Pos: 369
Relay_Master_Log_File: mysql2-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 154
Relay_Log_Space: 743
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
Master_UUID: 43314749-67f6-11e9-b1c7-0050569e5639
Master_Info_File: /mysql/mysql/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
ERROR:
No query specified
mysql> show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.54.232
Master_User: rep1
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql3-bin.000001
Read_Master_Log_Pos: 154
Relay_Log_File: slave-relay-bin.000002
Relay_Log_Pos: 321
Relay_Master_Log_File: mysql3-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 154
Relay_Log_Space: 528
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 2
Master_UUID: d45ab02b-67f8-11e9-8a14-0050569e8e90
Master_Info_File: /mysql/mysql/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
ERROR:
No query specified
mysql>
-- 然后VIP漂到了mysql3 上
[root@mysql3 network-scripts]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 00:50:56:9e:8e:90 brd ff:ff:ff:ff:ff:ff
inet 192.168.54.232/24 brd 192.168.54.255 scope global ens192
valid_lft forever preferred_lft forever
inet 192.168.54.233/24 brd 192.168.54.255 scope global secondary ens192:1
valid_lft forever preferred_lft forever
inet6 fe80::f39e:715c:c308:83da/64 scope link
valid_lft forever preferred_lft forever
[root@mysql3 network-scripts]#
-- 然后，在管理节点上查看状态,MHA 进程会自动停止运行
[root@mysql1 bin]# masterha_check_status --conf=/usr/local/mha/mha.conf
mha is stopped(2:NOT_RUNNING).
[root@mysql1 bin]#
--- 恢复操作 ，将关闭的节点启动
[root@mysql2 mha]# service mysql start
Starting MySQL. SUCCESS!
[root@mysql2 mha]#
-- 重新指向新的主库，配置主从 -- 在原来的主库上操作 ，也就是将其作为从库了
change master to master_host='192.168.54.232',master_user='rep1',master_password='mysql',master_log_pos=154;
start slave
5.4 在线切换测试
[root@mysql1 bin]# masterha_master_switch --conf=/usr/local/mha/mha.conf --master_state=alive --new_master_host=mysql3 --orig_master_is_new_slave
Mon Apr 29 10:36:58 2019 - [info] MHA::MasterRotate version 0.58.
Mon Apr 29 10:36:58 2019 - [info] Starting online master switch..
Mon Apr 29 10:36:58 2019 - [info]
Mon Apr 29 10:36:58 2019 - [info] * Phase 1: Configuration Check Phase..
Mon Apr 29 10:36:58 2019 - [info]
Mon Apr 29 10:36:58 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Mon Apr 29 10:36:58 2019 - [info] Reading application default configuration from /usr/local/mha/mha.conf..
Mon Apr 29 10:36:58 2019 - [info] Reading server configuration from /usr/local/mha/mha.conf..
Mon Apr 29 10:36:59 2019 - [info] GTID failover mode = 1
Mon Apr 29 10:36:59 2019 - [info] Current Alive Master: mysql2(192.168.54.231:3306)
Mon Apr 29 10:36:59 2019 - [info] Alive Slaves:
Mon Apr 29 10:36:59 2019 - [info] mysql1(192.168.54.230:3306) Version=5.7.25-log (oldest major version between slaves) log-bin:enabled
Mon Apr 29 10:36:59 2019 - [info] GTID ON
Mon Apr 29 10:36:59 2019 - [info] Replicating from 192.168.54.231(192.168.54.231:3306)
Mon Apr 29 10:36:59 2019 - [info] Not candidate for the new Master (no_master is set)
Mon Apr 29 10:36:59 2019 - [info] mysql3(192.168.54.232:3306) Version=5.7.25-log (oldest major version between slaves) log-bin:enabled
Mon Apr 29 10:36:59 2019 - [info] GTID ON
Mon Apr 29 10:36:59 2019 - [info] Replicating from 192.168.54.231(192.168.54.231:3306)
Mon Apr 29 10:36:59 2019 - [info] Primary candidate for the new Master (candidate_master is set)
It is better to execute FLUSH NO_WRITE_TO_BINLOG TABLES on the master before switching. Is it ok to execute on mysql2(192.168.54.231:3306)? (YES/no): yes
Mon Apr 29 10:37:01 2019 - [info] Executing FLUSH NO_WRITE_TO_BINLOG TABLES. This may take long time..
Mon Apr 29 10:37:01 2019 - [info] ok.
Mon Apr 29 10:37:01 2019 - [info] Checking MHA is not monitoring or doing failover..
Mon Apr 29 10:37:01 2019 - [info] Checking replication health on mysql1..
Mon Apr 29 10:37:01 2019 - [info] ok.
Mon Apr 29 10:37:01 2019 - [info] Checking replication health on mysql3..
Mon Apr 29 10:37:01 2019 - [info] ok.
Mon Apr 29 10:37:01 2019 - [info] mysql3 can be new master.
Mon Apr 29 10:37:01 2019 - [info]
From:
mysql2(192.168.54.231:3306) (current master)
+--mysql1(192.168.54.230:3306)
+--mysql3(192.168.54.232:3306)
To:
mysql3(192.168.54.232:3306) (new master)
+--mysql1(192.168.54.230:3306)
+--mysql2(192.168.54.231:3306)
Starting master switch from mysql2(192.168.54.231:3306) to mysql3(192.168.54.232:3306)? (yes/NO): yes
Mon Apr 29 10:37:03 2019 - [info] Checking whether mysql3(192.168.54.232:3306) is ok for the new master..
Mon Apr 29 10:37:03 2019 - [info] ok.
Mon Apr 29 10:37:03 2019 - [info] ** Phase 1: Configuration Check Phase completed.
Mon Apr 29 10:37:03 2019 - [info]
Mon Apr 29 10:37:03 2019 - [info] * Phase 2: Rejecting updates Phase..
Mon Apr 29 10:37:03 2019 - [info]
Mon Apr 29 10:37:03 2019 - [info] Executing master ip online change script to disable write on the current master:
Mon Apr 29 10:37:03 2019 - [info] /usr/local/scripts/master_ip_online_change --command=stop --orig_master_host=mysql2 --orig_master_ip=192.168.54.231 --orig_master_port=3306 --orig_master_user='root' --new_master_host=mysql3 --new_master_ip=192.168.54.232 --new_master_port=3306 --new_master_user='root' --orig_master_ssh_user=root --new_master_ssh_user=root --orig_master_is_new_slave --orig_master_password=xxx --new_master_password=xxx
Mon Apr 29 10:37:03 2019 200912 Set read_only on the new master.. ok.
Mon Apr 29 10:37:03 2019 202523 drop vip 192.168.54.233..
Mon Apr 29 10:37:03 2019 533798 Waiting all running 2 threads are disconnected.. (max 1500 milliseconds)
{'Time' => '3364','db' => undef,'Id' => '22','User' => 'rep1','State' => 'Master has sent all binlog to slave; waiting for more updates','Command' => 'Binlog Dump GTID','Info' => undef,'Host' => 'mysql1:39526'}
{'Time' => '2161','db' => undef,'Id' => '48','User' => 'rep1','State' => 'Master has sent all binlog to slave; waiting for more updates','Command' => 'Binlog Dump GTID','Info' => undef,'Host' => 'mysql3:36336'}
Mon Apr 29 10:37:04 2019 033354 Waiting all running 2 threads are disconnected.. (max 1000 milliseconds)
{'Time' => '3364','db' => undef,'Id' => '22','User' => 'rep1','State' => 'Master has sent all binlog to slave; waiting for more updates','Command' => 'Binlog Dump GTID','Info' => undef,'Host' => 'mysql1:39526'}
{'Time' => '2161','db' => undef,'Id' => '48','User' => 'rep1','State' => 'Master has sent all binlog to slave; waiting for more updates','Command' => 'Binlog Dump GTID','Info' => undef,'Host' => 'mysql3:36336'}
Mon Apr 29 10:37:04 2019 533708 Waiting all running 2 threads are disconnected.. (max 500 milliseconds)
{'Time' => '3365','db' => undef,'Id' => '22','User' => 'rep1','State' => 'Master has sent all binlog to slave; waiting for more updates','Command' => 'Binlog Dump GTID','Info' => undef,'Host' => 'mysql1:39526'}
{'Time' => '2162','db' => undef,'Id' => '48','User' => 'rep1','State' => 'Master has sent all binlog to slave; waiting for more updates','Command' => 'Binlog Dump GTID','Info' => undef,'Host' => 'mysql3:36336'}
Mon Apr 29 10:37:05 2019 034148 Set read_only=1 on the orig master.. ok.
Mon Apr 29 10:37:05 2019 034870 Waiting all running 2 queries are disconnected.. (max 500 milliseconds)
{'Time' => '3365','db' => undef,'Id' => '22','User' => 'rep1','State' => 'Master has sent all binlog to slave; waiting for more updates','Command' => 'Binlog Dump GTID','Info' => undef,'Host' => 'mysql1:39526'}
{'Time' => '2162','db' => undef,'Id' => '48','User' => 'rep1','State' => 'Master has sent all binlog to slave; waiting for more updates','Command' => 'Binlog Dump GTID','Info' => undef,'Host' => 'mysql3:36336'}
Mon Apr 29 10:37:05 2019 534506 Killing all application threads..
Mon Apr 29 10:37:05 2019 535141 done.
Mon Apr 29 10:37:05 2019 - [info] ok.
Mon Apr 29 10:37:05 2019 - [info] Locking all tables on the orig master to reject updates from everybody (including root):
Mon Apr 29 10:37:05 2019 - [info] Executing FLUSH TABLES WITH READ LOCK..
Mon Apr 29 10:37:05 2019 - [info] ok.
Mon Apr 29 10:37:05 2019 - [info] Orig master binlog:pos is mysql2-bin.000004:9000459.
Mon Apr 29 10:37:05 2019 - [info] Waiting to execute all relay logs on mysql3(192.168.54.232:3306)..
Mon Apr 29 10:37:05 2019 - [info] master_pos_wait(mysql2-bin.000004:9000459) completed on mysql3(192.168.54.232:3306). Executed 0 events.
Mon Apr 29 10:37:05 2019 - [info] done.
Mon Apr 29 10:37:05 2019 - [info] Getting new master's binlog name and position..
Mon Apr 29 10:37:05 2019 - [info] mysql3-bin.000007:194
Mon Apr 29 10:37:05 2019 - [info] All other slaves should start replication from here. Statement should be: CHANGE MASTER TO MASTER_HOST='mysql3 or 192.168.54.232', MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER='rep1', MASTER_PASSWORD='xxx';
Mon Apr 29 10:37:05 2019 - [info] Executing master ip online change script to allow write on the new master:
Mon Apr 29 10:37:05 2019 - [info] /usr/local/scripts/master_ip_online_change --command=start --orig_master_host=mysql2 --orig_master_ip=192.168.54.231 --orig_master_port=3306 --orig_master_user='root' --new_master_host=mysql3 --new_master_ip=192.168.54.232 --new_master_port=3306 --new_master_user='root' --orig_master_ssh_user=root --new_master_ssh_user=root --orig_master_is_new_slave --orig_master_password=xxx --new_master_password=xxx
Mon Apr 29 10:37:05 2019 633353 Set read_only=0 on the new master.
Mon Apr 29 10:37:05 2019 633728Add vip 192.168.54.233 on ens192..
Mon Apr 29 10:37:05 2019 - [info] ok.
Mon Apr 29 10:37:06 2019 - [info]
Mon Apr 29 10:37:06 2019 - [info] * Switching slaves in parallel..
Mon Apr 29 10:37:06 2019 - [info]
Mon Apr 29 10:37:06 2019 - [info] -- Slave switch on host mysql1(192.168.54.230:3306) started, pid: 25045
Mon Apr 29 10:37:06 2019 - [info]
Mon Apr 29 10:37:07 2019 - [info] Log messages from mysql1 ...
Mon Apr 29 10:37:07 2019 - [info]
Mon Apr 29 10:37:06 2019 - [info] Waiting to execute all relay logs on mysql1(192.168.54.230:3306)..
Mon Apr 29 10:37:06 2019 - [info] master_pos_wait(mysql2-bin.000004:9000459) completed on mysql1(192.168.54.230:3306). Executed 0 events.
Mon Apr 29 10:37:06 2019 - [info] done.
Mon Apr 29 10:37:06 2019 - [info] Resetting slave mysql1(192.168.54.230:3306) and starting replication from the new master mysql3(192.168.54.232:3306)..
Mon Apr 29 10:37:06 2019 - [info] Executed CHANGE MASTER.
Mon Apr 29 10:37:06 2019 - [info] Slave started.
Mon Apr 29 10:37:07 2019 - [info] End of log messages from mysql1 ...
Mon Apr 29 10:37:07 2019 - [info]
Mon Apr 29 10:37:07 2019 - [info] -- Slave switch on host mysql1(192.168.54.230:3306) succeeded.
Mon Apr 29 10:37:07 2019 - [info] Unlocking all tables on the orig master:
Mon Apr 29 10:37:07 2019 - [info] Executing UNLOCK TABLES..
Mon Apr 29 10:37:07 2019 - [info] ok.
Mon Apr 29 10:37:07 2019 - [info] Starting orig master as a new slave..
Mon Apr 29 10:37:07 2019 - [info] Resetting slave mysql2(192.168.54.231:3306) and starting replication from the new master mysql3(192.168.54.232:3306)..
Mon Apr 29 10:37:07 2019 - [info] Executed CHANGE MASTER.
Mon Apr 29 10:37:08 2019 - [info] Slave started.
Mon Apr 29 10:37:08 2019 - [info] All new slave servers switched successfully.
Mon Apr 29 10:37:08 2019 - [info]
Mon Apr 29 10:37:08 2019 - [info] * Phase 5: New master cleanup phase..
Mon Apr 29 10:37:08 2019 - [info]
Mon Apr 29 10:37:08 2019 - [info] mysql3: Resetting slave info succeeded.
Mon Apr 29 10:37:08 2019 - [info] Switching master to mysql3(192.168.54.232:3306) completed successfully.
[root@mysql1 bin]#
END