MySQL 有关MHA搭建与切换的几个错误log汇总

吾爱主题阅读：175 2024-04-02 07:58:28 评论：0

1：masterha_check_repl 副本集方面报错 replicates is not defined in the configuration file!

具体信息如下：

1 2 3 4 5 6 7 8 9 10 11 # /usr/ local /bin/masterha_check_repl --conf=/etc/mha/app1.cnf Thu Nov 21 15:33:15 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping. Thu Nov 21 15:33:15 2018 - [info] Reading application default configuration from /etc/mha/app1.cnf.. Thu Nov 21 15:33:15 2018 - [info] Reading server configuration from /etc/mha/app1.cnf.. Thu Nov 21 15:33:15 2018 - [info] MHA::MasterMonitor version 0.56. Thu Nov 21 15:33:16 2018- [error][/usr/ local /share/perl5/MHA/ServerManager.pm, ln671] Master 179.179.19.179:3306 from which slave 179.179.19.180(179.179.19.180:3306) replicates is not defined in the configuration file! Thu Nov 21 15:33:16 2018 - [error][/usr/ local /share/perl5/MHA/MasterMonitor.pm, ln424] Error happened on checking configurations. at /usr/ local /share/perl5/MHA/MasterMonitor.pm line 326. Thu Nov 21 15:33:16 2018 - [error][/usr/ local /share/perl5/MHA/MasterMonitor.pm, ln523] Error happened on monitoring servers. Thu Nov 21 15:33:16 2018 - [info] Got exit code 1 ( Not master dead). MySQL Replication Health is NOT OK!

分析：MHA 漂移过后，我们知道配置信息中主节点的信息就不在了，我们需要及时维护，否则/usr/local/bin/masterha_check_repl --conf=/etc/mha/XXX.cnf 检查副本集状态报错。

2. masterha_master_switch 在线切换方面报错 We should not start online master switch when one of connections are running long updates on the current master

具体信息如下：

1 2 3 4 5 6 7 8 9 10 11 12 13 # /usr/ local /bin/masterha_master_switch --master_state=alive --conf=/etc/mha/app1.cnf It is better to execute FLUSH NO_WRITE_TO_BINLOG TABLES on the master before switching. Is it ok to execute on 179.179.19.184(179.179.19.184:3306)? (YES/ no ): y Tue Nov 19 17:19:09 2018 - [info] Executing FLUSH NO_WRITE_TO_BINLOG TABLES. This may take long time .. Tue Nov 19 17:19:09 2018 - [info] ok. Tue Nov 19 17:19:09 2018 - [info] Checking MHA is not monitoring or doing failover.. Tue Nov 19 17:19:09 2018 - [info] Checking replication health on 179.179.19.185.. Tue Nov 19 17:19:09 2018 - [info] ok. Tue Nov 19 17:19:09 2018 - [error][/usr/ local /share/perl5/MHA/MasterRotate.pm, ln161] We should not start online master switch when one of connections are running long updates on the current master(179.179.19.184(179.179.19.184:3306)). Currently 1 update thread(s) are running. Details: { 'Time' => '12815' , 'db' => undef, 'Id' => '1' , 'User' => 'event_scheduler' , 'State' => 'Waiting on empty queue' , 'Command' => 'Daemon' , 'Info' => undef, 'Host' => 'localhost' } Tue Nov 19 17:19:09 2018 - [error][/usr/ local /share/perl5/MHA/ManagerUtil.pm, ln177] Got ERROR: at /usr/ local /bin/masterha_master_switch line 53.

分析：set global event_scheduler=off; 主从都要关闭

3. masterha_master_switch 在线切换方面报错 Got Error: DBI .....failed: Access denied for user

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 # /usr/ local /bin/masterha_master_switch --master_state=alive --conf=/etc/mha/app1.cnf Starting master switch from 179.179.19.185(179.179.19:3306) to 179.179.19.184(179.179.19.184:3306)? (yes/ NO ): yes Tue Nov 19 18:52:04 2018 - [info] Checking whether 179.179.19.184(179.179.19.184:3306) is ok for the new master.. Tue Nov 19 18:52:04 2018 - [info] ok. Tue Nov 19 18:52:04 2018 - [info] ** Phase 1: Configuration Check Phase completed. Tue Nov 19 18:52:04 2018 - [info] Tue Nov 19 18:52:04 2018 - [info] * Phase 2: Rejecting updates Phase.. Tue Nov 19 18:52:04 2018 - [info] Tue Nov 19 18:52:04 2018 - [info] Executing master ip online change script to disable write on the current master: Tue Nov 19 18:52:04 2018 - [info] /usr/ local /bin/master_ip_online_change_appuanalysis --command=stop --orig_master_host=179.179.19.185 --orig_master_ip=179.179.19.185 --orig_master_port=3306--orig_master_user='weixinLX391P_xldbmha' --orig_master_password='weixinLX391P_xldbmha\)qlk' --new_master_host=179.179.19.184 --new_master_ip=179.179.19.184 --new_master_port=55988 --new_master_user='us_mha' --new_master_password='weixinLX391P_xldbmha\)qlk' --orig_master_ssh_user=root --new_master_ssh_user=root Got Error: DBI connect ( ';host=179.179.19.184;port=3306;mysql_connect_timeout=4' , 'weixinLX391P_xldbmha' ,...) failed: Access denied for user 'weixinLX391P_xldbmha' @ '179.179.19.166' (using password : YES) at /usr/ local /share/perl5/MHA/DBHelper.pm line 205. at /usr/ local /bin/master_ip_online_change_app1 line 119. Tue Nov 19 18:52:04 2018 - [error][/usr/ local /share/perl5/MHA/ManagerUtil.pm, ln177] Got ERROR: at /usr/ local /bin/masterha_master_switch line 53.

分析：账号密码有需要转移字符的。app1.cnf 文件中user账号相应的密码 password 不能有待转移的字符，例如本例中的')'，但是账号 repl_user 相应的密码repl_password 没有此限制。

4.如果使用的是xtrabackup，注意从节点会把event还原上去，可能会造成数据不一致，同步失败的问题。

如果主节点有event，需要手动关闭从节点的event。例如，主节点有归档删除数据的event，从节点需要关闭，否则报错。类似如下错误：

1	`Could` `not` `execute` `Delete_rows event` `on` `table` `????DB.***` `table` `; Can` `'t find record in '` `***` `', Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND; the event'` `s master log` `FIRST` `, end_log_pos XXXXXXX`

5 .GTID 模式转换为传统模式后，MHA 机制下数据库主从检查报错。

检查的命令：

1	`/usr/` `local` `/bin/masterha_check_repl` `--conf=/etc/mha/qqweixinordb.cnf`

主要的报错信息

1 2 3 4 5 6 7 8 9 10 Can't exec "mysqlbinlog" : No such file or directory at /usr/ local /share/perl5/MHA/BinlogManager.pm line 106. mysqlbinlog version command failed with rc 1:0, please verify PATH, LD_LIBRARY_PATH, and client options at /usr/ local /bin/apply_diff_relay_logs line 493. Fri Aug 28 04:38:22 2019 - [error][/usr/ local /share/perl5/MHA/MasterMonitor.pm, ln205] Slaves settings check failed! Fri Aug 28 04:38:22 2019 - [error][/usr/ local /share/perl5/MHA/MasterMonitor.pm, ln413] Slave configuration failed. Fri Aug 28 04:38:22 2019 - [error][/usr/ local /share/perl5/MHA/MasterMonitor.pm, ln424] Error happened on checking configurations. at /usr/ local /bin/masterha_check_repl line 48. Fri Aug 28 04:38:22 2019 - [error][/usr/ local /share/perl5/MHA/MasterMonitor.pm, ln523] Error happened on monitoring servers. Fri Aug 28 04:38:22 2019 - [info] Got exit code 1 ( Not master dead). MySQL Replication Health is NOT OK!

解决方案--在每个DB节点执行以下命令

1 2 3 ln -s /usr/ local /mysql/bin/mysqlbinlog /usr/ local /bin/mysqlbinlog ln -s /usr/ local /mysql/bin/mysql /usr/ local /bin/mysql

再次检查，报错信息消失，OK。

6.root 账号密码过期

以root账号设置的ssh免密登陆，而ssh有过期限制，则mha ssh检查时报错:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 /usr/ local /bin/masterha_check_ssh --conf=/etc/mha/qqorder.cnf Thu Nov 5 10:09:09 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping. Thu Nov 5 10:09:09 2018 - [info] Reading application default configuration from /etc/mha/pms20epime.cnf.. Thu Nov 5 10:09:09 2018 - [info] Reading server configuration from /etc/mha/pms20epime.cnf.. Thu Nov 5 10:09:09 2018 - [info] Starting SSH connection tests.. Thu Nov 5 10:09:09 2018 - [error][/usr/ local /share/perl5/MHA/SSHCheck.pm, ln63] Thu Nov 5 10:09:09 2018 - [debug] Connecting via SSH from root@172.181.191.191(172.181.191.191:22) to root@172.181.191.192(172.181.191.192:22).. WARNING: Your password has expired. Password change required but no TTY available. Thu Nov 5 10:09:09 2018 - [error][/usr/ local /share/perl5/MHA/SSHCheck.pm, ln111] SSH connection from root@172.181.191.191(172.181.191.191:22) to root@172.181.191.192(172.181.191.192:22) failed! Thu Nov 5 10:09:10 2018 - [error][/usr/ local /share/perl5/MHA/SSHCheck.pm, ln63] Thu Nov 5 10:09:09 2018 - [debug] Connecting via SSH from root@172.181.191.192(172.181.191.192:22) to root@172.181.191.191(172.181.191.191:22).. WARNING: Your password has expired. Password change required but no TTY available. Thu Nov 5 10:09:10 2018 - [error][/usr/ local /share/perl5/MHA/SSHCheck.pm, ln111] SSH connection from root@172.181.191.192(172.181.191.192:22) to root@172.181.191.191(172.181.191.191:22) failed! SSH Configuration Check Failed! at /usr/ local /bin/masterha_check_ssh line 44.