二：管理節點

1：按照步驟一安裝mha node

2:安裝mha manager

[[email protected] ~]# yum -y install perl-Config-Tiny perl-Params-Validate perl-Log-Dispatch perl-Parallel-ForkManager

[[email protected] ~]# wget mha4mysql-manager-0.52.tar.gz -P /usr/local/src/tarbag/

[[email protected] ~]# cd /usr/local/src/tarbag/

[[email protected] tarbag]# tar -zxvpf mha4mysql-manager-0.52.tar.gz -C ../software/

[[email protected] tarbag]# cd ../software/mha4mysql-manager-0.52/

[[email protected] mha4mysql-manager-0.52]# perl Makefile.PL

[[email protected] mha4mysql-manager-0.52]# make && make install

3:編輯配置文件

[[email protected] mha4mysql-manager-0.52]# mkdir /etc/masterha

[[email protected] mha4mysql-manager-0.52]# mkdir -p /masterha/app1

[[email protected] mha4mysql-manager-0.52]# cp samples/conf/* /etc/masterha/

[[email protected] mha4mysql-manager-0.52]# cat /etc/masterha/app1.cnf

[server default]

manager_workdir=/masterha/app1

manager_log=/masterha/app1/manager.log

user=root

password=123456

ssh_user=root

repl_user=r_test

repl_password=123456

ping_interval=1

shutdown_script=""

#master_ip_failover_script="/usr/local/bin/master_ip_failover"

master_ip_online_change_script=""

report_script=""

[server1]

hostname=172.25.254.225

master_binlog_dir="/mydata"

candidate_master=1

[server2]

hostname=172.25.254.126

master_binlog_dir="/mydata"

candidate_master=1

4:配置manager節點和node節點以及node節點間的ssh公鑰信任

[[email protected] ~]# ssh-keygen -t rsa

[[email protected] ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub [email protected]

[[email protected] ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub [email protected]

[[email protected] ~]# ssh 172.25.254.225 "ifconfig |grep ‘inet addr‘ |head -1"

inet addr:172.25.254.225 Bcast:172.25.254.255 Mask:255.255.255.0

[[email protected] ~]# ssh 172.25.254.126 "ifconfig |grep ‘inet addr‘ |head -1"

inet addr:172.25.254.126 Bcast:172.25.254.255 Mask:255.255.255.0

5：測試ssh連接

[[email protected] ~]# masterha_check_ssh --conf=/etc/masterha/app1.cnf

Wed Jun 6 11:11:25 2012 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.

Wed Jun 6 11:11:25 2012 - [info] Reading application default configurations from /etc/masterha/app1.cnf..

Wed Jun 6 11:11:25 2012 - [info] Reading server configurations from /etc/masterha/app1.cnf..

Wed Jun 6 11:11:25 2012 - [info] Starting SSH connection tests..

Wed Jun 6 11:11:25 2012 - [debug]

6：測試主從復制情況，默認使用root用戶連接

mysql> select user,host,password from mysql.user;

+--------+----------------+-------------------------------------------+

| user | host | password |

+--------+----------------+-------------------------------------------+

| root | localhost | |

| root | dg53.yang.com | |

| root | 127.0.0.1 | |

| root | ::1 | |

| | localhost | |

| | dg53.yang.com | |

| r_test | 192.168.123.14 | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

+--------+----------------+-------------------------------------------+

7 rows in set (0.08 sec)

mysql> use mysql;

Database changed

mysql> update user set host=‘192.168.123.%‘ where user=‘r_test‘;

Query OK, 1 row affected (0.05 sec)

Rows matched: 1 Changed: 1 Warnings: 0

mysql> commit;

Query OK, 0 rows affected (0.01 sec)

mysql> update user set host=‘192.168.123.%‘ where host=‘localhost‘ and user=‘root‘ and password=‘‘;

Query OK, 0 rows affected (0.00 sec)

Rows matched: 1 Changed: 1 Warnings: 0

mysql> update user set password=PASSWORD(‘123456‘) where user=‘root‘ and host=‘192.168.123.%‘;

Query OK, 0 rows affected (0.00 sec)

Rows matched: 1 Changed: 0 Warnings: 0

mysql> flush privileges;

Query OK, 0 rows affected (0.02 sec)

[[email protected] ~]# whereis mysqlbinlog

mysqlbinlog: /usr/bin/mysqlbinlog

[[email protected] ~]# mv /usr/bin/mysql* /tmp

[[email protected] ~]# mv /usr/bin/mysql* /tmp

[[email protected] ~]# ln -s /usr/local/mysql5.5.25/bin/* /usr/local/bin/

[[email protected] ~]# ln -s /usr/local/mysql5.5.25/bin/* /usr/local/bin/

[[email protected] ~]# masterha_check_repl --conf=/etc/masterha/app1.cnf

Wed Jun 6 12:39:03 2012 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.

Wed Jun 6 12:39:03 2012 - [info] Reading application default configurations from /etc/masterha/app1.cnf..

Wed Jun 6 12:39:03 2012 - [info] Reading server configurations from /etc/masterha/app1.cnf..

Wed Jun 6 12:39:03 2012 - [info] MHA::MasterMonitor version 0.52.

Wed Jun 6 12:39:03 2012 - [info] Dead Servers:

Wed Jun 6 12:39:03 2012 - [info] Alive Servers:

Wed Jun 6 12:39:03 2012 - [info] 192.168.123.13(192.168.123.13:3306)

Wed Jun 6 12:39:03 2012 - [info] 192.168.123.14(192.168.123.14:3306)

Wed Jun 6 12:39:03 2012 - [info] Alive Slaves:

Wed Jun 6 12:39:03 2012 - [info] 192.168.123.14(192.168.123.14:3306) Version=5.5.25-log (oldest major version between slaves) log-bin:enabled

Wed Jun 6 12:39:03 2012 - [info] Replicating from 192.168.123.13(192.168.123.13:3306)

Wed Jun 6 12:39:03 2012 - [info] Primary candidate for the new Master (candidate_master is set)

Wed Jun 6 12:39:03 2012 - [info] Current Alive Master: 192.168.123.13(192.168.123.13:3306)

Wed Jun 6 12:39:03 2012 - [info] Checking slave configurations..

Wed Jun 6 12:39:03 2012 - [warning] read_only=1 is not set on slave 192.168.123.14(192.168.123.14:3306).

Wed Jun 6 12:39:03 2012 - [warning] relay_log_purge=0 is not set on slave 192.168.123.14(192.168.123.14:3306).

Wed Jun 6 12:39:03 2012 - [info] Checking replication filtering settings..

Wed Jun 6 12:39:03 2012 - [info] binlog_do_db= bbs,test, binlog_ignore_db= mysql

Wed Jun 6 12:39:03 2012 - [info] Replication filtering check ok.

Wed Jun 6 12:39:03 2012 - [info] Starting SSH connection tests..

Wed Jun 6 12:39:05 2012 - [info] All SSH connection tests passed successfully.

Wed Jun 6 12:39:05 2012 - [info] Checking MHA Node version..

Wed Jun 6 12:39:05 2012 - [info] Version check ok.

Wed Jun 6 12:39:05 2012 - [info] Checking SSH publickey authentication and checking recovery script configurations on the current master..

Wed Jun 6 12:39:05 2012 - [info] Executing command: save_binary_logs --command=test --start_file=mysql-bin.000011 --start_pos=4 --binlog_dir=/mydata --output_file=/var/tmp/save_binary_logs_test --manager_version=0.52

Wed Jun 6 12:39:05 2012 - [info] Connecting to [email protected](172.25.254.125)..

Creating /var/tmp if not exists.. ok.

Checking output directory is accessible or not..

ok.

Binlog found at /mydata, up to mysql-bin.000011

Wed Jun 6 12:39:06 2012 - [info] Master setting check done.

Wed Jun 6 12:39:06 2012 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers..

Wed Jun 6 12:39:06 2012 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user=root --slave_host=172.25.254.225 --slave_ip=172.25.254.225 --slave_port=3306 --workdir=/var/tmp --target_version=5.5.25-log --manager_version=0.52 --relay_log_info=/mydata/relay-log.info --slave_pass=xxx

Wed Jun 6 12:39:06 2012 - [info] Connecting to [email protected](172.25.254.225)..

Checking slave recovery environment settings..

Opening /mydata/relay-log.info ... ok.

Relay log found at /mydata, up to dg54-relay-bin.000019

Temporary relay log file is /mydata/dg54-relay-bin.000019

Testing mysql connection and privileges.. done.

Testing mysqlbinlog output.. done.

Cleaning up test file(s).. done.

Wed Jun 6 12:39:06 2012 - [info] Slaves settings check done.

Wed Jun 6 12:39:06 2012 - [info] Checking replication health on 172.25.254.225

Wed Jun 6 12:39:06 2012 - [info] ok.

Wed Jun 6 12:39:06 2012 - [warning] master_ip_failover_script is not defined.

Wed Jun 6 12:39:06 2012 - [warning] shutdown_script is not defined.

Wed Jun 6 12:39:06 2012 - [info] Got exit code 0 (Not master dead).

MySQL Replication Health is OK.

7：啟動管理節點進程

[[email protected] ~]# nohup masterha_manager --conf=/etc/masterha/app1.cnf > /tmp/mha_manager.log < /dev/null 2>&1 &

[1] 25516

[[email protected] ~]# masterha_check_status --conf=/etc/masterha/app1.cnf

app1 (pid:25516) is running(0:PING_OK), master:172.25.254.125

三：測試failover過程

1：當前主庫為172.25.254.125，關閉主庫

mysql> show slave hosts;

+-----------+------+------+-----------+

| Server_id | Host | Port | Master_id |

+-----------+------+------+-----------+

| 2 | | 3306 | 1 |

+-----------+------+------+-----------+

1 row in set (0.00 sec)

[[email protected] ~]# service mysqld stop

Shutting down MySQL...[ OK ]

2：在管理節點上觀察日誌輸出

[[email protected] ~]# tail -f /masterha/app1/manager.log

Wed Jun 6 14:50:48 2012 - [info]

192.168.123.13 (current master)

+--192.168.123.14

Wed Jun 6 14:50:48 2012 - [warning] master_ip_failover_script is not defined.

Wed Jun 6 14:50:48 2012 - [warning] shutdown_script is not defined.

Wed Jun 6 14:50:48 2012 - [info] Set master ping interval 1 seconds.

Wed Jun 6 14:50:48 2012 - [warning] secondary_check_script is not defined. It is highly recommended setting it to check master reachability from two or more routes.

Wed Jun 6 14:50:48 2012 - [info] Starting ping health check on 172.25.254.125(172.25.254.125:3306)..

Wed Jun 6 14:50:48 2012 - [info] Ping succeeded, sleeping until it doesn‘t respond..

Wed Jun 6 14:51:32 2012 - [warning] Got error on MySQL ping: 2006 (MySQL server has gone away)

Wed Jun 6 14:51:32 2012 - [info] HealthCheck: SSH to 172.25.254.125 is reachable.

Wed Jun 6 14:51:33 2012 - [warning] Got error on MySQL connect: 2013 (Lost connection to MySQL server at ‘reading initial communication packet‘, system error: 111)

Wed Jun 6 14:51:33 2012 - [warning] Connection failed 1 time(s)..

Wed Jun 6 14:51:34 2012 - [warning] Got error on MySQL connect: 2013 (Lost connection to MySQL server at ‘reading initial communication packet‘, system error: 111)

Wed Jun 6 14:51:34 2012 - [warning] Connection failed 2 time(s)..

Wed Jun 6 14:51:35 2012 - [warning] Got error on MySQL connect: 2013 (Lost connection to MySQL server at ‘reading initial communication packet‘, system error: 111)

Wed Jun 6 14:51:35 2012 - [warning] Connection failed 3 time(s)..

Wed Jun 6 14:51:35 2012 - [warning] Master is not reachable from health checker!

Wed Jun 6 14:51:35 2012 - [warning] Master 172.25.254.125(172.25.254.125:3306) is not reachable!

Wed Jun 6 14:51:35 2012 - [warning] SSH is reachable.

Wed Jun 6 14:51:35 2012 - [info] Connecting to a master server failed. Reading configuration file /etc/masterha_default.cnf and /etc/masterha/app1.cnf again, and trying to connect to all servers to check server status..

Wed Jun 6 14:51:35 2012 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.

Wed Jun 6 14:51:35 2012 - [info] Reading application default configurations from /etc/masterha/app1.cnf..

Wed Jun 6 14:51:35 2012 - [info] Reading server configurations from /etc/masterha/app1.cnf..

3：在原從庫192.168.123.14上查看結果

mysql> show master status;

+------------------+----------+--------------+------------------+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |

+------------------+----------+--------------+------------------+

| mysql-bin.000023 | 107 | bbs,test | mysql |

+------------------+----------+--------------+------------------+

1 row in set (0.00 sec)

mysql> show slave status\G;

*************************** 1. row ***************************

Slave_IO_State:

Master_Host: 172.25.254.125

Master_User: r_test

Master_Port: 3306

Connect_Retry: 60

Master_Log_File:

Read_Master_Log_Pos: 4

Relay_Log_File: dg54-relay-bin.000001

Relay_Log_Pos: 4

Relay_Master_Log_File:

Slave_IO_Running: No

Slave_SQL_Running: No

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: 0

Relay_Log_Space: 126

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: NULL

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

1 row in set (0.00 sec)

ERROR:

No query specified

mysql+mha高可用搭建