MySQL高可用之MHA安装

 

Preface

 

    MasterHA is a tool which can be used
in MySQL HA architecture.I’m gonna implement it and have some tests
depend on it later.

 

Framework

 

Hostname IP Port Identity OS Version MySQL Version
zlm2 192.168.1.101 3306 master CentOS 7.0 5.7.21
zlm3 192.168.1.102 3306 slave/mha-manager CentOS 7.0 5.7.21
null 192.168.1.200 null vip null null

 

Procedure

 

澳门新葡亰平台游戏,Downlaod the rpm package of MasterHA using
below web link first:

https://code.google.com/archive/p/mysql-master-ha/downloads

MasterHA’s
wiki document.

https://github.com/yoshinorim/mha4mysql-manager/wiki

 

Configure
ssh authentication between zlm2 and zlm3 from each other.

 1 [root@zlm2 09:00:44 ~]
 2 #ssh-keygen -t rsa
 3 Generating public/private rsa key pair.
 4 Enter file in which to save the key (/root/.ssh/id_rsa): 
 5 Enter passphrase (empty for no passphrase): 
 6 Enter same passphrase again: 
 7 Your identification has been saved in /root/.ssh/id_rsa.
 8 Your public key has been saved in /root/.ssh/id_rsa.pub.
 9 The key fingerprint is:
10 48:36:15:af:d7:97:3c:94:f3:0e:bc:ea:34:f1:bc:43 root@zlm2
11 The key's randomart image is:
12 +--[ RSA 2048]----+
13 |        o.       |
14 |       . .     . |
15 |      +   .   +  |
16 |     o o . . + + |
17 |      . S . o B .|
18 |         .   =E= |
19 |            o.+ .|
20 |           . o.. |
21 |           .o .. |
22 +-----------------+
23 
24 [root@zlm2 09:03:04 ~]
25 #cd .ssh
26 
27 [root@zlm2 09:03:09 ~/.ssh]
28 #ls -l
29 total 12
30 -rw------- 1 root root 1675 Aug  2 09:02 id_rsa
31 -rw-r--r-- 1 root root  391 Aug  2 09:02 id_rsa.pub
32 -rw-r--r-- 1 root root  360 Jun 13 09:51 known_hosts
33 
34 [root@zlm2 09:03:18 ~/.ssh]
35 #cat id_rsa.pub >> authorized_keys
36 
37 [root@zlm2 09:07:51 ~/.ssh]
38 #scp ./* zlm3:~/.ssh/
39 root@zlm3's password: 
40 authorized_keys                                                                                                    100%  391     0.4KB/s   00:00    
41 id_rsa                                                                                                             100% 1675     1.6KB/s   00:00    
42 id_rsa.pub                                                                                                         100%  391     0.4KB/s   00:00    
43 known_hosts                                                                                                        100%  360     0.4KB/s   00:00
44 
45 [root@zlm2 09:08:22 ~/.ssh]
46 #ssh zlm3
47 Last login: Thu Aug  2 08:47:54 2018 from 192.168.1.1
48 Welcome to your Vagrant-built virtual machine.
49 
50 [root@zlm3 09:10:39 ~]
51 #
52 
53 [root@zlm3 09:11:13 ~/.ssh]
54 #ssh zlm2
55 The authenticity of host 'zlm2 (192.168.1.101)' can't be established.
56 ECDSA key fingerprint is 75:06:22:b7:e2:3b:46:88:51:97:c4:4f:27:20:21:26.
57 Are you sure you want to continue connecting (yes/no)? yes
58 Warning: Permanently added 'zlm2,192.168.1.101' (ECDSA) to the list of known hosts.
59 Last login: Thu Aug  2 03:29:04 2018 from 192.168.1.1
60 Welcome to your Vagrant-built virtual machine.
61 
62 [root@zlm2 09:11:22 ~]
63 #

 

**Configure a master-slave
replication.**

 

  1 [root@zlm2 09:18:30 ~]
  2 #scp db3306_20180802.sql zlm3:~/
  3 db3306_20180802.sql                                                                                                100% 8429KB   8.2MB/s   00:00
  4 
  5 [root@zlm3 09:19:55 ~]
  6 #mysql < db3306_20180802.sql 
  7 ERROR 1840 (HY000) at line 24: @@GLOBAL.GTID_PURGED can only be set when @@GLOBAL.GTID_EXECUTED is empty.
  8 
  9 [root@zlm3 09:20:00 ~]
 10 #mysql
 11 Welcome to the MySQL monitor.  Commands end with ; or \g.
 12 Your MySQL connection id is 3
 13 Server version: 5.7.21-log MySQL Community Server (GPL)
 14 
 15 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
 16 
 17 Oracle is a registered trademark of Oracle Corporation and/or its
 18 affiliates. Other names may be trademarks of their respective
 19 owners.
 20 
 21 Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 22 
 23 (zlm@192.168.1.102 3306)[(none)]>reset master;
 24 Query OK, 0 rows affected (0.03 sec)
 25 
 26 (zlm@192.168.1.102 3306)[(none)]>exit
 27 Bye
 28 
 29 [root@zlm3 09:20:28 ~]
 30 #mysql < db3306_20180802.sql
 31 
 32 [root@zlm3 09:20:34 ~]
 33 #mysql
 34 Welcome to the MySQL monitor.  Commands end with ; or \g.
 35 Your MySQL connection id is 5
 36 Server version: 5.7.21-log MySQL Community Server (GPL)
 37 
 38 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
 39 
 40 Oracle is a registered trademark of Oracle Corporation and/or its
 41 affiliates. Other names may be trademarks of their respective
 42 owners.
 43 
 44 Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 45 
 46 (zlm@192.168.1.102 3306)[(none)]>change master to \
 47     -> master_host='192.168.1.101',\
 48     -> master_port=3306,\
 49     -> master_user='repl',\
 50     -> master_password='repl4slave',\
 51     -> master_auto_position=1;
 52 Query OK, 0 rows affected, 2 warnings (0.02 sec)
 53 
 54 (zlm@192.168.1.102 3306)[(none)]>start slave;
 55 Query OK, 0 rows affected (0.00 sec)
 56 
 57 (zlm@192.168.1.102 3306)[(none)]>show slave status\G
 58 *************************** 1. row ***************************
 59                Slave_IO_State: Waiting for master to send event
 60                   Master_Host: 192.168.1.101
 61                   Master_User: repl
 62                   Master_Port: 3306
 63                 Connect_Retry: 60
 64               Master_Log_File: mysql-bin.000048
 65           Read_Master_Log_Pos: 736
 66                Relay_Log_File: relay-bin.000002
 67                 Relay_Log_Pos: 398
 68         Relay_Master_Log_File: mysql-bin.000048
 69              Slave_IO_Running: Yes
 70             Slave_SQL_Running: Yes
 71               Replicate_Do_DB: 
 72           Replicate_Ignore_DB: 
 73            Replicate_Do_Table: 
 74        Replicate_Ignore_Table: 
 75       Replicate_Wild_Do_Table: 
 76   Replicate_Wild_Ignore_Table: 
 77                    Last_Errno: 0
 78                    Last_Error: 
 79                  Skip_Counter: 0
 80           Exec_Master_Log_Pos: 736
 81               Relay_Log_Space: 591
 82               Until_Condition: None
 83                Until_Log_File: 
 84                 Until_Log_Pos: 0
 85            Master_SSL_Allowed: No
 86            Master_SSL_CA_File: 
 87            Master_SSL_CA_Path: 
 88               Master_SSL_Cert: 
 89             Master_SSL_Cipher: 
 90                Master_SSL_Key: 
 91         Seconds_Behind_Master: 0
 92 Master_SSL_Verify_Server_Cert: No
 93                 Last_IO_Errno: 0
 94                 Last_IO_Error: 
 95                Last_SQL_Errno: 0
 96                Last_SQL_Error: 
 97   Replicate_Ignore_Server_Ids: 
 98              Master_Server_Id: 1013306
 99                   Master_UUID: 1b7181ee-6eaf-11e8-998e-080027de0e0e
100              Master_Info_File: mysql.slave_master_info
101                     SQL_Delay: 0
102           SQL_Remaining_Delay: NULL
103       Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
104            Master_Retry_Count: 86400
105                   Master_Bind: 
106       Last_IO_Error_Timestamp: 
107      Last_SQL_Error_Timestamp: 
108                Master_SSL_Crl: 
109            Master_SSL_Crlpath: 
110            Retrieved_Gtid_Set: 
111             Executed_Gtid_Set: 1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730247
112                 Auto_Position: 1
113          Replicate_Rewrite_DB: 
114                  Channel_Name: 
115            Master_TLS_Version: 
116 1 row in set (0.00 sec)

 

Install dependency packge
first.

 1 [root@zlm2 09:32:28 ~]
 2 #yum install -y perl-Time-HiRes perl-DBD-MySQL perl-Config-Tiny perl-Log-Dispatch perl-Parallel-ForkManager
 3 
 4 [root@zlm2 09:33:56 ~]
 5 #ssh zlm3
 6 Last login: Thu Aug  2 09:10:39 2018 from 192.168.1.101
 7 Welcome to your Vagrant-built virtual machine.
 8 
 9 [root@zlm3 09:34:03 ~]
10 #yum install -y perl-Time-HiRes perl-DBD-MySQL perl-Config-Tiny perl-Log-Dispatch perl-Parallel-ForkManager

 

Install both manager and node rpm on
master and slave.

 1 [root@zlm2 09:39:08 ~]
 2 #rpm -ivh mha4mysql-manager-0.56-0.el6.noarch.rpm 
 3 error: Failed dependencies:
 4     mha4mysql-node >= 0.54 is needed by mha4mysql-manager-0.56-0.el6.noarch
 5     perl(MHA::BinlogManager) is needed by mha4mysql-manager-0.56-0.el6.noarch
 6     perl(MHA::NodeConst) is needed by mha4mysql-manager-0.56-0.el6.noarch
 7     perl(MHA::NodeUtil) is needed by mha4mysql-manager-0.56-0.el6.noarch
 8     perl(MHA::SlaveUtil) is needed by mha4mysql-manager-0.56-0.el6.noarch
 9 
10 [root@zlm2 09:39:16 ~]
11 #rpm -ivh mha4mysql-node-0.56-0.el6.noarch.rpm 
12 Preparing...                          ################################# [100%]
13 Updating / installing...
14    1:mha4mysql-node-0.56-0.el6        ################################# [100%]
15 
16 [root@zlm2 09:39:48 ~]
17 #rpm -ivh mha4mysql-manager-0.56-0.el6.noarch.rpm 
18 Preparing...                          ################################# [100%]
19 Updating / installing...
20    1:mha4mysql-manager-0.56-0.el6     ################################# [100%]
21    
22 [root@zlm2 09:39:53 ~]
23 #ssh zlm3
24 Last login: Thu Aug  2 09:34:03 2018 from 192.168.1.101
25 Welcome to your Vagrant-built virtual machine.
26 
27 [root@zlm3 09:41:46 ~]
28 #rpm -ivh mha4mysql-node-0.56-0.el6.noarch.rpm
29 Preparing...                          ################################# [100%]
30 Updating / installing...
31    1:mha4mysql-node-0.56-0.el6        ################################# [100%]
32 
33 [root@zlm3 09:42:03 ~]
34 #rpm -ivh mha4mysql-manager-0.56-0.el6.noarch.rpm
35 Preparing...                          ################################# [100%]
36 Updating / installing...
37    1:mha4mysql-manager-0.56-0.el6     ################################# [100%]   

 

Configure the conf files on each manager
node.

 1 [root@zlm2 09:48:22 ~]
 2 #mkdir -p /var/log/masterha/app1
 3 
 4 [root@zlm2 09:48:28 ~]
 5 #mkdir /etc/masterha
 6 
 7 [root@zlm2 09:48:35 ~]
 8 #cp /vagrant/masterha/* /etc/masterha/
 9 
10 [root@zlm2 09:50:02 ~]
11 #cd /etc/masterha/
12 
13 [root@zlm2 09:50:09 /etc/masterha]
14 #ll
15 total 36
16 -rwxr-xr-x 1 root root   614 Aug  2 09:50 app1.conf
17 -rwxr-xr-x 1 root root    55 Aug  2 09:50 drop_vip.sh
18 -rwxr-xr-x 1 root root    55 Aug  2 09:50 init_vip.sh
19 -rwxr-xr-x 1 root root   384 Aug  2 09:50 masterha_default.conf
20 -rwxr-xr-x 1 root root  4438 Aug  2 09:50 master_ip_failover
21 -rwxr-xr-x 1 root root 10526 Aug  2 09:50 master_ip_online_change
22 
23 [root@zlm2 09:51:46 /etc/masterha]
24 #cat masterha_default.conf 
25 [server default]
26 #log_level=debug
27 user=zlm
28 password=zlmzlm
29 
30 ssh_user=root
31 ssh_port=3306
32 
33 repl_user=repl
34 repl_password=repl4slave
35 
36 ping_interval=1
37 #shutdown_script=""
38 
39 master_ip_failover_script= /etc/masterha/master_ip_failover
40 master_ip_online_change_script= /etc/masterha/master_ip_online_change
41 
42 [root@zlm2 09:53:56 /etc/masterha]
43 #cat app1.conf 
44 [server default]
45 
46 manager_workdir = /var/log/masterha/app1
47 manager_log = /var/log/masterha/app1/app1.log
48 remote_workdir = /var/log/masterha/app1
49 
50 [server1]
51 hostname=192.168.1.101
52 master_binlog_dir = /data/mysql/mysql3306/logs
53 candidate_master = 1
54 check_repl_delay = 0
55 
56 [server2]
57 hostname=192.168.1.102
58 master_binlog_dir=/data/mysql/mysql3306/logs
59 candidate_master=1
60 check_repl_delay=0
61 
62 [root@zlm2 09:56:20 /etc/masterha]
63 #cat init_vip.sh 
64 vip="192.168.1.200/24"
65 /sbin/ip addr add $vip dev enp0s8
66 
67 [root@zlm2 09:56:23 /etc/masterha]
68 #cat drop_vip.sh 
69 vip="192.168.1.200/24"
70 /sbin/ip addr del $vip dev enp0s8
71 
72 [root@zlm2 09:57:27 /etc/masterha]
73 #ssh zlm3
74 Last login: Thu Aug  2 09:40:20 2018 from 192.168.1.1
75 Welcome to your Vagrant-built virtual machine.
76 
77 [root@zlm3 09:58:04 ~]
78 #mkdir -p /var/log/masterha/app1
79 
80 [root@zlm3 09:58:16 ~]
81 #mkdir /etc/masterha
82 
83 [root@zlm3 09:58:30 ~]
84 #scp zlm2:/etc/masterha/* /etc/masterha
85 app1.conf                                                                                                          100%  498     0.5KB/s   00:00    
86 drop_vip.sh                                                                                                        100%   57     0.1KB/s   00:00    
87 init_vip.sh                                                                                                        100%   57     0.1KB/s   00:00    
88 masterha_default.conf                                                                                              100%  387     0.4KB/s   00:00    
89 master_ip_failover                                                                                                 100% 4438     4.3KB/s   00:00    
90 master_ip_online_change                                                                                            100%   10KB  10.3KB/s   00:00

 

Check the masterha status on both
nodes..

 1 [root@zlm2 10:00:26 /etc/masterha]
 2 #masterha_
 3 masterha_check_repl       masterha_check_status     masterha_manager          masterha_master_switch    masterha_stop
 4 masterha_check_ssh        masterha_conf_host        masterha_master_monitor   masterha_secondary_check
 5 
 6 [root@zlm2 10:00:26 /etc/masterha]
 7 #masterha_check_status --conf=./app1.conf
 8 app1 is stopped(2:NOT_RUNNING).
 9 
10 [root@zlm2 10:01:45 /etc/masterha]
11 #masterha_check_ssh --conf=./app1.conf
12 Thu Aug  2 10:02:05 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
13 Thu Aug  2 10:02:05 2018 - [info] Reading application default configuration from ./app1.conf..
14 Thu Aug  2 10:02:05 2018 - [info] Reading server configuration from ./app1.conf..
15 Thu Aug  2 10:02:05 2018 - [info] Starting SSH connection tests..
16 Thu Aug  2 10:02:06 2018 - [debug] 
17 Thu Aug  2 10:02:05 2018 - [debug]  Connecting via SSH from root@192.168.1.101(192.168.1.101:22) to root@192.168.1.102(192.168.1.102:22)..
18 Warning: Permanently added '192.168.1.101' (ECDSA) to the list of known hosts.
19 Thu Aug  2 10:02:06 2018 - [debug]   ok.
20 Thu Aug  2 10:02:06 2018 - [debug] 
21 Thu Aug  2 10:02:06 2018 - [debug]  Connecting via SSH from root@192.168.1.102(192.168.1.102:22) to root@192.168.1.101(192.168.1.101:22)..
22 Thu Aug  2 10:02:06 2018 - [debug]   ok.
23 Thu Aug  2 10:02:06 2018 - [info] All SSH connection tests passed successfully.
24 
25 [root@zlm2 10:02:06 /etc/masterha]
26 #masterha_check_repl --conf=./app1.conf
27 Thu Aug  2 10:02:15 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
28 Thu Aug  2 10:02:15 2018 - [info] Reading application default configuration from ./app1.conf..
29 Thu Aug  2 10:02:15 2018 - [info] Reading server configuration from ./app1.conf..
30 Thu Aug  2 10:02:15 2018 - [info] MHA::MasterMonitor version 0.56.
31 Thu Aug  2 10:02:15 2018 - [error][/usr/share/perl5/vendor_perl/MHA/ServerManager.pm, ln301] Got MySQL error when connecting 192.168.1.101(192.168.1.101:3306) :1045:Access denied for user 'root'@'zlm2' (using password: NO), but this is not a MySQL crash. Check MySQL server settings.
32  at /usr/share/perl5/vendor_perl/MHA/ServerManager.pm line 297.
33 Thu Aug  2 10:02:16 2018 - [error][/usr/share/perl5/vendor_perl/MHA/ServerManager.pm, ln301] Got MySQL error when connecting 192.168.1.102(192.168.1.102:3306) :1045:Access denied for user 'root'@'zlm2' (using password: NO), but this is not a MySQL crash. Check MySQL server settings.
34  at /usr/share/perl5/vendor_perl/MHA/ServerManager.pm line 297.
35 Thu Aug  2 10:02:16 2018 - [error][/usr/share/perl5/vendor_perl/MHA/ServerManager.pm, ln309] Got fatal error, stopping operations
36 Thu Aug  2 10:02:16 2018 - [error][/usr/share/perl5/vendor_perl/MHA/MasterMonitor.pm, ln424] Error happened on checking configurations.  at /usr/share/perl5/vendor_perl/MHA/MasterMonitor.pm line 326.
37 Thu Aug  2 10:02:16 2018 - [error][/usr/share/perl5/vendor_perl/MHA/MasterMonitor.pm, ln523] Error happened on monitoring servers.
38 Thu Aug  2 10:02:16 2018 - [info] Got exit code 1 (Not master dead).
39 
40 MySQL Replication Health is NOT OK!
41 
42 [root@zlm2 10:57:47 /etc/masterha]
43 #masterha_check_repl --conf=./app1.conf --global_conf=./masterha_default.conf //The "--global_conf" option is indispensable.
44 Thu Aug  2 10:57:58 2018 - [info] Reading default configuration from /etc/masterha/masterha_default.conf..
45 Thu Aug  2 10:57:58 2018 - [info] Reading application default configuration from ./app1.conf..
46 Thu Aug  2 10:57:58 2018 - [info] Reading server configuration from ./app1.conf..
47 Thu Aug  2 10:57:58 2018 - [info] MHA::MasterMonitor version 0.56.
48 Thu Aug  2 10:57:59 2018 - [info] GTID failover mode = 1
49 Thu Aug  2 10:57:59 2018 - [info] Dead Servers:
50 Thu Aug  2 10:57:59 2018 - [info] Alive Servers:
51 Thu Aug  2 10:57:59 2018 - [info]   192.168.1.101(192.168.1.101:3306)
52 Thu Aug  2 10:57:59 2018 - [info]   192.168.1.102(192.168.1.102:3306)
53 Thu Aug  2 10:57:59 2018 - [info] Alive Slaves:
54 Thu Aug  2 10:57:59 2018 - [info]   192.168.1.102(192.168.1.102:3306)  Version=5.7.21-log (oldest major version between slaves) log-bin:enabled
55 Thu Aug  2 10:57:59 2018 - [info]     GTID ON
56 Thu Aug  2 10:57:59 2018 - [info]     Replicating from 192.168.1.101(192.168.1.101:3306)
57 Thu Aug  2 10:57:59 2018 - [info]     Primary candidate for the new Master (candidate_master is set)
58 Thu Aug  2 10:57:59 2018 - [info] Current Alive Master: 192.168.1.101(192.168.1.101:3306)
59 Thu Aug  2 10:57:59 2018 - [info] Checking slave configurations..
60 Thu Aug  2 10:57:59 2018 - [info]  read_only=1 is not set on slave 192.168.1.102(192.168.1.102:3306).
61 Thu Aug  2 10:57:59 2018 - [info] Checking replication filtering settings..
62 Thu Aug  2 10:57:59 2018 - [info]  binlog_do_db= , binlog_ignore_db= 
63 Thu Aug  2 10:57:59 2018 - [info]  Replication filtering check ok.
64 Thu Aug  2 10:57:59 2018 - [info] GTID (with auto-pos) is supported. Skipping all SSH and Node package checking.
65 Thu Aug  2 10:57:59 2018 - [info] Checking SSH publickey authentication settings on the current master..
66 ssh_exchange_identification: Connection closed by remote host
67 Thu Aug  2 10:57:59 2018 - [warning] HealthCheck: SSH to 192.168.1.101 is NOT reachable.
68 Thu Aug  2 10:57:59 2018 - [info] 
69 192.168.1.101(192.168.1.101:3306) (current master)
70  +--192.168.1.102(192.168.1.102:3306)
71 
72 Thu Aug  2 10:57:59 2018 - [info] Checking replication health on 192.168.1.102..
73 Thu Aug  2 10:57:59 2018 - [info]  ok.
74 Thu Aug  2 10:57:59 2018 - [info] Checking master_ip_failover_script status:
75 Thu Aug  2 10:57:59 2018 - [info]   /etc/masterha/master_ip_failover --command=status --ssh_user=root --orig_master_host=192.168.1.101 --orig_master_ip=192.168.1.101 --orig_master_port=3306  --orig_master_ssh_port=3306
76 Thu Aug  2 10:57:59 2018 - [info]  OK.
77 Thu Aug  2 10:57:59 2018 - [warning] shutdown_script is not defined.
78 Thu Aug  2 10:57:59 2018 - [info] Got exit code 0 (Not master dead).
79 
80 MySQL Replication Health is OK.
81 
82 //Do these above checking operations on zlm3,too.

 

Start MasterHA-manager and check the
status.

 1 [root@zlm2 11:13:24 /etc/masterha]
 2 #masterha_manager --conf=./app1.conf --global_conf=./masterha_default.conf &
 3 [1] 5091
 4 
 5 [root@zlm2 11:13:55 /etc/masterha]
 6 #Thu Aug  2 11:13:56 2018 - [info] Reading default configuration from ./masterha_default.conf..
 7 Thu Aug  2 11:13:56 2018 - [info] Reading application default configuration from ./app1.conf..
 8 Thu Aug  2 11:13:56 2018 - [info] Reading server configuration from ./app1.conf..
 9 ssh_exchange_identification: Connection closed by remote host
10 ^C
11 
12 [root@zlm2 11:14:09 /etc/masterha]
13 #masterha_check_status --conf=./app1.conf
14 app1 (pid:5091) is running(0:PING_OK), master:192.168.1.101
15 
16 [root@zlm2 10:57:15 /etc/masterha]
17 #cd /var/log/masterha/app1
18 
19 [root@zlm2 11:16:17 /var/log/masterha/app1]
20 #ls -l
21 total 8
22 -rw-r--r-- 1 root root 3821 Aug  2 11:13 app1.log
23 -rw-r--r-- 1 root root   35 Aug  2 11:16 app1.master_status.health
24 
25 [root@zlm2 11:16:19 /var/log/masterha/app1]
26 #tail app1.log 
27  +--192.168.1.102(192.168.1.102:3306)
28 
29 Thu Aug  2 11:13:57 2018 - [info] Checking master_ip_failover_script status:
30 Thu Aug  2 11:13:57 2018 - [info]   /etc/masterha/master_ip_failover --command=status --ssh_user=root --orig_master_host=192.168.1.101 --orig_master_ip=192.168.1.101 --orig_master_port=3306  --orig_master_ssh_port=3306
31 Thu Aug  2 11:13:57 2018 - [info]  OK.
32 Thu Aug  2 11:13:57 2018 - [warning] shutdown_script is not defined.
33 Thu Aug  2 11:13:57 2018 - [info] Set master ping interval 1 seconds.
34 Thu Aug  2 11:13:57 2018 - [warning] secondary_check_script is not defined. It is highly recommended setting it to check master reachability from two or more routes.
35 Thu Aug  2 11:13:57 2018 - [info] Starting ping health check on 192.168.1.101(192.168.1.101:3306)..
36 Thu Aug  2 11:13:57 2018 - [info] Ping(SELECT) succeeded, waiting until MySQL doesn't respond..
37 
38 [root@zlm2 11:16:35 /var/log/masterha/app1]
39 #tail app1.master_status.health 
40 5091    0:PING_OK    master:192.168.1.101