Mysql GTID Mha設置方法的示例代碼分享

Gtid + Mha +Binlog server配置：

1：測試環(huán)境

OS：CentOS 6.5
Mysql：5.6.28
Mha：0.56

192.168.1.21 mysql1 M1
192.168.1.22 mysql2 S1
192.168.1.23 mysql3 S2 Mha manage、Binlog server

2：配置/etc/my.cnf相關(guān)參數(shù),在3各節(jié)點中分別配置

binlog-format=ROW 
log-slave-updates=true 
gtid-mode=on 
enforce-gtid-consistency=true 
master-info-repository=TABLE 
relay-log-info-repository=TABLE 
sync-master-info=1 
slave-parallel-workers=2 
binlog-checksum=CRC32 
master-verify-checksum=1 
slave-sql-verify-checksum=1 
binlog-rows-query-log_events=1

設置root密碼，創(chuàng)建復制用戶：

mysql> use mysql;
mysql> GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "oracle123";
mysql> update user set Password = password('oracle123') where User='root';
mysql> flush privileges;

mysql> GRANT replication slave ON *.* TO 'repl'@'%' identified by 'oracle';    

mysql> flush privileges;

3：在mysql2、mysql3配置Gtid復制

CHANGE MASTER TO 
MASTER_HOST = '192.168.1.21',
MASTER_PORT = 3306,
MASTER_USER = 'repl',
MASTER_PASSWORD = 'oracle',
MASTER_AUTO_POSITION = 1;

start slave;

mysql> show slave status\G
*************************** 1. row ***************************
        Slave_IO_State: Waiting for master to send event
         Master_Host: 192.168.1.21
         Master_User: repl
         Master_Port: 3306
        Connect_Retry: 60
       Master_Log_File: mysql-bin.000003
     Read_Master_Log_Pos: 524
        Relay_Log_File: mysql-relay-bin.000002
        Relay_Log_Pos: 734
    Relay_Master_Log_File: mysql-bin.000003
       Slave_IO_Running: Yes
      Slave_SQL_Running: Yes
       Replicate_Do_DB: 
      ......
 Master_SSL_Crlpath: 
      Retrieved_Gtid_Set: 9ee7c7af-cbf3-11e5-bf75-000c2923e459:1-2
      Executed_Gtid_Set: 9ee7c7af-cbf3-11e5-bf75-000c2923e459:1-2
        Auto_Position: 1
1 row in set (0.00 sec)

4：安裝Mha

rpm -Uvh epel-release-6-8.noarch.rpm

配置SSH等效：

在所有節(jié)點都執(zhí)行

ssh-keygen -t rsa
ssh-copy-id -i /root/.ssh/id_rsa.pub root@mysql1
ssh-copy-id -i /root/.ssh/id_rsa.pub root@mysql2
ssh-copy-id -i /root/.ssh/id_rsa.pub root@mysql3

測試ssh登錄，在3各節(jié)點分別測試：

ssh myqsl1
ssh myqsl2
ssh myqsl3

binlog server配置：在mysql3

mkdir -p /mysql/backup/binlog
/usr/local/mysql/bin/mysqlbinlog -R --raw --host=192.168.1.20 --user='root' --password='oracle123' --stop-never mysql-
bin.000003 &

最后那個binlog文件時給定從那個binlog文件開始。另外需要注意，當mysql1上的mysql進程退出后，binlog server也會退出。

需要安裝一些包做支持，使用yum網(wǎng)絡源；如安裝遇到問題可以嘗試yum update更新yum源或yum clean all清除緩存

在每個節(jié)點安裝 mha4mysql-node

yum -y install perl-DBD-MySQL ncftp
rpm -Uvh mha4mysql-node-0.56-0.el6.noarch.rpm

在mysql3上安裝mha-manager

yum install perl
yum install cpan
yum install perl-Config-Tiny
yum install perl-Time-HiRes 
yum install perl-Log-Dispatch
yum install perl-Parallel-ForkManager

如果安裝perl-Log-Dispatch，perl-Parallel-ForkManager安裝包報錯：

需要先安裝epel

rpm -Uvh mha4mysql-manager-0.56-0.el6.noarch.rpm

5：配置Mha,在mysql3

mkdir -p /etc/masterha/app1
vi /etc/masterha/app1.cnf
[server default]
user=root  
password=oracle123
manager_workdir=/etc/masterha/app1
manager_log=/etc/masterha/app1/manager.log
remote_workdir=/etc/masterha/app1
ssh_user=root
repl_user=repluser
repl_password=oracle
ping_interval=3
master_ip_failover_script=/etc/masterha/app1/master_ip_failover

[server1]
hostname=192.168.1.21
#ssh_port=9999
master_binlog_dir=/mysql/logs
check_repl_delay=0       #防止master故障時候，切換時slave有延遲，可在那里切不過來
candidate_master=1

[server2]
hostname=192.168.1.22
#ssh_port=9999
master_binlog_dir=/mysql/logs
candidate_master=1

[server3]
hostname=192.168.1.23
#ssh_port=9999
master_binlog_dir=/mysql/logs
no_master=1
ignore_fail=1           #如果這個節(jié)點掛了，mha將不可用，加上這個參數(shù)slave掛了一樣可以用

[binlog1]                   #binlog server需要mysqlbinlog命令
hostname=192.168.1.23
master_binlog_dir=/mysql/backup/binlog    #讀取binlog存放位置
ignore_fail=1
no_master=1

vi /etc/masterha/app1/master_ip_failover
#!/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 = '192.168.1.20';#Virtual IP
my $gateway = '192.168.1.1';#Gateway IP
my $interface = 'eth0';
my $key = "1";
my $ssh_start_vip = "/sbin/ifconfig $interface:$key $vip;/sbin/arping -I $interface -c 3 -s $vip $gateway >/dev/null 2>&1";
my $ssh_stop_vip = "/sbin/ifconfig $interface:$key down";
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 $ssh_user\@$orig_master_host \" $ssh_start_vip \"`;
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 \"`;
}
# 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 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";
}

chmod 777 /etc/masterha/app1/

配置文件測試：

# masterha_check_ssh --conf=/etc/masterha/app1.cnf
Thu May 26 23:25:35 2016 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Thu May 26 23:25:35 2016 - [info] Reading application default configuration from /etc/masterha/app1.cnf..
Thu May 26 23:25:35 2016 - [info] Reading server configuration from /etc/masterha/app1.cnf..
Thu May 26 23:25:35 2016 - [info] Starting SSH connection tests..
Thu May 26 23:25:35 2016 - [debug] 
Thu May 26 23:25:35 2016 - [debug] Connecting via SSH from root@192.168.1.21(192.168.1.21:22) to root@192.168.1.22(192.168.1.22:22)..
Thu May 26 23:25:35 2016 - [debug]  ok.
Thu May 26 23:25:35 2016 - [debug] Connecting via SSH from root@192.168.1.21(192.168.1.21:22) to root@192.168.1.23(192.168.1.23:22)..
Thu May 26 23:25:35 2016 - [debug]  ok.
Thu May 26 23:25:36 2016 - [debug] 
Thu May 26 23:25:35 2016 - [debug] Connecting via SSH from root@192.168.1.22(192.168.1.22:22) to root@192.168.1.21(192.168.1.21:22)..
Thu May 26 23:25:35 2016 - [debug]  ok.
Thu May 26 23:25:35 2016 - [debug] Connecting via SSH from root@192.168.1.22(192.168.1.22:22) to root@192.168.1.23(192.168.1.23:22)..
Thu May 26 23:25:36 2016 - [debug]  ok.
Thu May 26 23:25:36 2016 - [debug] 
Thu May 26 23:25:36 2016 - [debug] Connecting via SSH from root@192.168.1.23(192.168.1.23:22) to root@192.168.1.21(192.168.1.21:22)..
Thu May 26 23:25:36 2016 - [debug]  ok.
Thu May 26 23:25:36 2016 - [debug] Connecting via SSH from root@192.168.1.23(192.168.1.23:22) to root@192.168.1.22(192.168.1.22:22)..
Thu May 26 23:25:36 2016 - [debug]  ok.
Thu May 26 23:25:36 2016 - [info] All SSH connection tests passed successfully.

#masterha_check_repl --conf=/etc/masterha/app1.cnf
Thu May 26 22:52:30 2016 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
Thu May 26 22:52:30 2016 - [info] Reading application default configuration from /etc/masterha/app1.cnf..
Thu May 26 22:52:30 2016 - [info] Reading server configuration from /etc/masterha/app1.cnf..
Thu May 26 22:52:30 2016 - [info] MHA::MasterMonitor version 0.56.
Thu May 26 22:52:31 2016 - [info] GTID failover mode = 1
Thu May 26 22:52:31 2016 - [info] Dead Servers:
Thu May 26 22:52:31 2016 - [info] Alive Servers:
Thu May 26 22:52:31 2016 - [info]  192.168.1.21(192.168.1.21:3306)
Thu May 26 22:52:31 2016 - [info]  192.168.1.22(192.168.1.22:3306)
Thu May 26 22:52:31 2016 - [info]  192.168.1.23(192.168.1.23:3306)
Thu May 26 22:52:31 2016 - [info] Alive Slaves:
Thu May 26 22:52:31 2016 - [info]  192.168.1.22(192.168.1.22:3306) Version=5.6.28-log (oldest major version between slaves) log-bin:enabled
Thu May 26 22:52:31 2016 - [info]   GTID ON
Thu May 26 22:52:31 2016 - [info]   Replicating from 192.168.1.21(192.168.1.21:3306)
Thu May 26 22:52:31 2016 - [info]   Primary candidate for the new Master (candidate_master is set)
Thu May 26 22:52:31 2016 - [info]  192.168.1.23(192.168.1.23:3306) Version=5.6.28-log (oldest major version between slaves) log-bin:enabled
Thu May 26 22:52:31 2016 - [info]   GTID ON
Thu May 26 22:52:31 2016 - [info]   Replicating from 192.168.1.21(192.168.1.21:3306)
Thu May 26 22:52:31 2016 - [info]   Not candidate for the new Master (no_master is set)
Thu May 26 22:52:31 2016 - [info] Current Alive Master: 192.168.1.21(192.168.1.21:3306)
Thu May 26 22:52:31 2016 - [info] Checking slave configurations..
Thu May 26 22:52:31 2016 - [info] read_only=1 is not set on slave 192.168.1.22(192.168.1.22:3306).
Thu May 26 22:52:31 2016 - [info] read_only=1 is not set on slave 192.168.1.23(192.168.1.23:3306).
Thu May 26 22:52:31 2016 - [info] Checking replication filtering settings..
Thu May 26 22:52:31 2016 - [info] binlog_do_db= , binlog_ignore_db= 
Thu May 26 22:52:31 2016 - [info] Replication filtering check ok.
Thu May 26 22:52:31 2016 - [info] GTID (with auto-pos) is supported. Skipping all SSH and Node package checking.
Thu May 26 22:52:31 2016 - [info] HealthCheck: SSH to 192.168.1.23 is reachable.
Thu May 26 22:52:31 2016 - [info] Binlog server 192.168.1.23 is reachable.
Thu May 26 22:52:31 2016 - [info] Checking recovery script configurations on 192.168.1.23(192.168.1.23:3306)..
Thu May 26 22:52:31 2016 - [info]  Executing command: save_binary_logs --command=test --start_pos=4 
--binlog_dir=/mysql/backup/binlog --output_file=/etc/masterha/app1/save_binary_logs_test --manager_version=0.56 --start_file=mysql-bin.000004 
Thu May 26 22:52:31 2016 - [info]  Connecting to root@192.168.1.23(192.168.1.23:22).. 
 Creating /etc/masterha/app1 if not exists..  ok.
 Checking output directory is accessible or not..
  ok.
Binlog found at /mysql/backup/binlog, up to mysql-bin.000004
Thu May 26 22:52:31 2016 - [info] Binlog setting check done.
Thu May 26 22:52:31 2016 - [info] Checking SSH publickey authentication settings on the current master..
Thu May 26 22:52:31 2016 - [info] HealthCheck: SSH to 192.168.1.21 is reachable.
Thu May 26 22:52:31 2016 - [info] 
192.168.1.21(192.168.1.21:3306) (current master)
 +--192.168.1.22(192.168.1.22:3306)
 +--192.168.1.23(192.168.1.23:3306)

Thu May 26 22:52:31 2016 - [info] Checking replication health on 192.168.1.22..
Thu May 26 22:52:31 2016 - [info] ok.
Thu May 26 22:52:31 2016 - [info] Checking replication health on 192.168.1.23..
Thu May 26 22:52:31 2016 - [info] ok.
Thu May 26 22:52:31 2016 - [info] Checking master_ip_failover_script status:
Thu May 26 22:52:31 2016 - [info]  /etc/masterha/app1/master_ip_failover --command=status --ssh_user=root 
--orig_master_host=192.168.1.21 --orig_master_ip=192.168.1.21 --orig_master_port=3306 

IN script TEST====/sbin/ifconfig eth1:1 down==/sbin/ifconfig eth1:1 192.168.1.20;/sbin/arping -I eth1 -c 3 -s 192.168.1.20 192.168.1.1 >/dev/null 2>&1===

Checking the Status of the script.. OK 
Thu May 26 22:52:34 2016 - [info] OK.
Thu May 26 22:52:34 2016 - [warning] shutdown_script is not defined.
Thu May 26 22:52:34 2016 - [info] Got exit code 0 (Not master dead).

MySQL Replication Health is OK.

MHA啟動及關(guān)閉

nohup masterha_manager --conf=/etc/masterha/app1.cnf > /etc/masterha/app1/manager.log < /dev/null 2>&1 &

檢查是否啟動：

masterha_check_status --conf=/etc/masterha/app1.cnf
app1 (pid:11447) is running(0:PING_OK), master:192.168.1.21

停止Mha：

masterha_stop --conf=/etc/masterha/app1.cnf
Stopped app1 successfully.
[3]+ Exit 1         nohup masterha_manager --conf=/etc/masterha/app1.cnf > /etc/masterha/app1/manager.log < /dev/null 2>&1

測試：

說明，每次測試完成后，需要清理/etc/masterha/app1下的日志，然后啟動Mha manager.

1：關(guān)閉mysql1上的mysql，查看從庫從那里同步，以及mha日志輸出

2：恢復mysql1為mysql2的slave，change master語句可以在/etc/masterha/app1/manager.log里找到。

在配置GTID復制時候遇到 1032錯誤，用以下方法解決

mysql> show global variables like '%gtid%';
+---------------------------------+------------------------------------------------------------------------------------+
  Variable_name            Value                                        
+---------------------------------+------------------------------------------------------------------------------------+
  binlog_gtid_simple_recovery     OFF                                         
  enforce_gtid_consistency      ON                                          
  gtid_executed            88b05570-2599-11e6-880a-000c29c18cf5:1-3,
9ee7c7af-cbf3-11e5-bf75-000c2923e459:1-4  
  gtid_mode              ON                                          
  gtid_owned                                                       
  gtid_purged                                                       
  simplified_binlog_gtid_recovery   OFF                                         
+---------------------------------+------------------------------------------------------------------------------------+

stop slave;
set gtid_next='9ee7c7af-cbf3-11e5-bf75-000c2923e459:4';
begin;
commit;
set gtid_next='automatic';
start slave;
show slave status\G;

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