环境:CentOS5.8 MySQL5.5.17 实验:搭建MHA高可用架构(非root用户SSH等效性配置)SSH等效性用户配置的是:concert 端口:1314 MHA配置文件 [concert@mhamanager mha]$ more /etc/masterha_default.cnf [server default] user = root password = mysql_admi
环境:CentOS5.8
MySQL5.5.17
实验:搭建MHA高可用架构(非root用户SSH等效性配置)SSH等效性用户配置的是:concert 端口:1314
MHA配置文件
[concert@mhamanager mha]$ more /etc/masterha_default.cnf
[server default]
user = root
password = mysql_admin
ssh_user = concert
ssh_port = 1314
repl_user = repl
repl_password = repl_pwd
ping_interval = 3
ping_type = select
[concert@mhamanager mha]$ more /etc/appl.cnf
[server default]
manager_workdir = /mha/appl
manager_log = /mha/appl/manager.log
remote_workdir = /mha/appl
[server1]
hostname = 192.168.66.88
master_binlog_dir = /data/lib/mysql
candidate_master = 1
[server2]
hostname = 192.168.66.89
master_binlog_dir = /data/lib/mysql
candidate_master = 1
[server3]
hostname = 192.168.66.120
no_master = 1
port = 3307
问题:配置好非root用户SSH等效性后,通过masterha_check_ssh检查没有问题
[concert@mhamanager ~]$ /usr/bin/masterha_check_ssh --conf=/etc/appl.cnf
Tue Sep 2 15:06:01 2014 - [info] Reading default configuratoins from /etc/masterha_default.cnf..
Tue Sep 2 15:06:01 2014 - [info] Reading application default configurations from /etc/appl.cnf..
Tue Sep 2 15:06:01 2014 - [info] Reading server configurations from /etc/appl.cnf..
Tue Sep 2 15:06:01 2014 - [info] Starting SSH connection tests..
Tue Sep 2 15:06:01 2014 - [debug]
Tue Sep 2 15:06:01 2014 - [debug] Connecting via SSH from concert@192.168.66.88(192.168.66.88:1314) to concert@192.168.66.89(192.168.66.89:1314)..
Tue Sep 2 15:06:01 2014 - [debug] ok.
Tue Sep 2 15:06:01 2014 - [debug] Connecting via SSH from concert@192.168.66.88(192.168.66.88:1314) to concert@192.168.66.120(192.168.66.120:1314)..
Tue Sep 2 15:06:01 2014 - [debug] ok.
Tue Sep 2 15:06:02 2014 - [debug]
Tue Sep 2 15:06:01 2014 - [debug] Connecting via SSH from concert@192.168.66.89(192.168.66.89:1314) to concert@192.168.66.88(192.168.66.88:1314)..
Tue Sep 2 15:06:01 2014 - [debug] ok.
Tue Sep 2 15:06:01 2014 - [debug] Connecting via SSH from concert@192.168.66.89(192.168.66.89:1314) to concert@192.168.66.120(192.168.66.120:1314)..
Tue Sep 2 15:06:02 2014 - [debug] ok.
Tue Sep 2 15:06:02 2014 - [debug]
Tue Sep 2 15:06:02 2014 - [debug] Connecting via SSH from concert@192.168.66.120(192.168.66.120:1314) to concert@192.168.66.88(192.168.66.88:1314)..
Tue Sep 2 15:06:02 2014 - [debug] ok.
Tue Sep 2 15:06:02 2014 - [debug] Connecting via SSH from concert@192.168.66.120(192.168.66.120:1314) to concert@192.168.66.89(192.168.66.89:1314)..
Tue Sep 2 15:06:02 2014 - [debug] ok.
Tue Sep 2 15:06:02 2014 - [info] All SSH connection tests passed successfully.
但通过masterha_check_repl检查则不通过
[concert@mhamanager ~]$ /usr/bin/masterha_check_repl --conf=/etc/appl.cnf
Tue Sep 2 17:10:08 2014 - [info] Reading default configuratoins from /etc/masterha_default.cnf..
Tue Sep 2 17:10:08 2014 - [info] Reading application default configurations from /etc/appl.cnf..
Tue Sep 2 17:10:08 2014 - [info] Reading server configurations from /etc/appl.cnf..
Tue Sep 2 17:10:08 2014 - [info] MHA::MasterMonitor version 0.55.
Tue Sep 2 17:10:08 2014 - [info] Dead Servers:
Tue Sep 2 17:10:08 2014 - [info] Alive Servers:
Tue Sep 2 17:10:08 2014 - [info] 192.168.66.88(192.168.66.88:3306)
Tue Sep 2 17:10:08 2014 - [info] 192.168.66.89(192.168.66.89:3306)
Tue Sep 2 17:10:08 2014 - [info] 192.168.66.120(192.168.66.120:3307)
Tue Sep 2 17:10:08 2014 - [info] Alive Slaves:
Tue Sep 2 17:10:08 2014 - [info] 192.168.66.89(192.168.66.89:3306) Version=5.5.17-log (oldest major version between slaves) log-bin:enabled
Tue Sep 2 17:10:08 2014 - [info] Replicating from 192.168.66.88(192.168.66.88:3306)
Tue Sep 2 17:10:08 2014 - [info] Primary candidate for the new Master (candidate_master is set)
Tue Sep 2 17:10:08 2014 - [info] 192.168.66.120(192.168.66.120:3307) Version=5.5.17-log (oldest major version between slaves) log-bin:enabled
Tue Sep 2 17:10:08 2014 - [info] Replicating from 192.168.66.88(192.168.66.88:3306)
Tue Sep 2 17:10:08 2014 - [info] Not candidate for the new Master (no_master is set)
Tue Sep 2 17:10:08 2014 - [info] Current Alive Master: 192.168.66.88(192.168.66.88:3306)
Tue Sep 2 17:10:08 2014 - [info] Checking slave configurations..
Tue Sep 2 17:10:08 2014 - [info] Checking replication filtering settings..
Tue Sep 2 17:10:08 2014 - [info] binlog_do_db= , binlog_ignore_db=
Tue Sep 2 17:10:08 2014 - [info] Replication filtering check ok.
Tue Sep 2 17:10:08 2014 - [info] Starting SSH connection tests..
Tue Sep 2 17:10:10 2014 - [error][/usr/lib/perl5/vendor_perl/MHA/MasterMonitor.pm, ln386] Error happend on checking configurations. SSH Configuration Check Failed!
at /usr/lib/perl5/vendor_perl/MHA/MasterMonitor.pm line 341
Tue Sep 2 17:10:10 2014 - [error][/usr/lib/perl5/vendor_perl/MHA/MasterMonitor.pm, ln482] Error happened on monitoring servers.
Tue Sep 2 17:10:10 2014 - [info] Got exit code 1 (Not master dead).
MySQL Replication Health is NOT OK!
解决方案:
1、增加remote_workdir(运行MySQL实例的服务器)的工作目录权限,其中会生成日志文件,将该目录拥有者设为concert
[root@master88 ~]# chown -R concert:concert /mha/
2、添加concert为MySQL同组用户,使其有读取MySQL binary/relay log文件和relay_log.info文件的权限,以及日志目录的写权限
[root@bakmaster ~]# usermod -g mysql concert
再次检查
[concert@mhamanager mha]$ /usr/bin/masterha_check_repl --conf=/etc/appl.cnf
Wed Sep 3 22:27:41 2014 - [info] Reading default configuratoins from /etc/masterha_default.cnf..
Wed Sep 3 22:27:41 2014 - [info] Reading application default configurations from /etc/appl.cnf..
Wed Sep 3 22:27:41 2014 - [info] Reading server configurations from /etc/appl.cnf..
Wed Sep 3 22:27:41 2014 - [info] MHA::MasterMonitor version 0.55.
Wed Sep 3 22:27:41 2014 - [info] Dead Servers:
Wed Sep 3 22:27:41 2014 - [info] Alive Servers:
Wed Sep 3 22:27:41 2014 - [info] 192.168.66.88(192.168.66.88:3306)
Wed Sep 3 22:27:41 2014 - [info] 192.168.66.89(192.168.66.89:3306)
Wed Sep 3 22:27:41 2014 - [info] 192.168.66.120(192.168.66.120:3307)
Wed Sep 3 22:27:41 2014 - [info] Alive Slaves:
Wed Sep 3 22:27:41 2014 - [info] 192.168.66.89(192.168.66.89:3306) Version=5.5.17-log (oldest major version between slaves) log-bin:enabled
Wed Sep 3 22:27:41 2014 - [info] Replicating from 192.168.66.88(192.168.66.88:3306)
Wed Sep 3 22:27:41 2014 - [info] Primary candidate for the new Master (candidate_master is set)
Wed Sep 3 22:27:41 2014 - [info] 192.168.66.120(192.168.66.120:3307) Version=5.5.17-log (oldest major version between slaves) log-bin:enabled
Wed Sep 3 22:27:41 2014 - [info] Replicating from 192.168.66.88(192.168.66.88:3306)
Wed Sep 3 22:27:41 2014 - [info] Not candidate for the new Master (no_master is set)
Wed Sep 3 22:27:41 2014 - [info] Current Alive Master: 192.168.66.88(192.168.66.88:3306)
Wed Sep 3 22:27:41 2014 - [info] Checking slave configurations..
Wed Sep 3 22:27:41 2014 - [info] Checking replication filtering settings..
Wed Sep 3 22:27:41 2014 - [info] binlog_do_db= , binlog_ignore_db=
Wed Sep 3 22:27:41 2014 - [info] Replication filtering check ok.
Wed Sep 3 22:27:41 2014 - [info] Starting SSH connection tests..
Wed Sep 3 22:27:42 2014 - [info] All SSH connection tests passed successfully.
Wed Sep 3 22:27:42 2014 - [info] Checking MHA Node version..
Wed Sep 3 22:27:43 2014 - [info] Version check ok.
Wed Sep 3 22:27:43 2014 - [info] Checking SSH publickey authentication settings on the current master..
Wed Sep 3 22:27:43 2014 - [info] HealthCheck: SSH to 192.168.66.88 is reachable.
Wed Sep 3 22:27:43 2014 - [info] Master MHA Node version is 0.54.
Wed Sep 3 22:27:43 2014 - [info] Checking recovery script configurations on the current master..
Wed Sep 3 22:27:43 2014 - [info] Executing command: save_binary_logs --command=test --start_pos=4 --binlog_dir=/data/lib/mysql --output_file=/mha/appl/save_binary_logs_test --manager_version=0.55 --start_file=mysql-bin.000004
Wed Sep 3 22:27:43 2014 - [info] Connecting to concert@192.168.66.88(192.168.66.88)..
Creating /mha/appl if not exists.. ok.
Checking output directory is accessible or not..
ok.
Binlog found at /data/lib/mysql, up to mysql-bin.000004
Wed Sep 3 22:27:43 2014 - [info] Master setting check done.
Wed Sep 3 22:27:43 2014 - [info] Checking SSH publickey authentication and checking recovery script configurations on all alive slave servers..
Wed Sep 3 22:27:43 2014 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=192.168.66.89 --slave_ip=192.168.66.89 --slave_port=3306 --workdir=/mha/appl --target_version=5.5.17-log --manager_version=0.55 --relay_log_info=/data/lib/mysql/relay-log.info --relay_dir=/data/lib/mysql/ --slave_pass=xxx
Wed Sep 3 22:27:43 2014 - [info] Connecting to concert@192.168.66.89(192.168.66.89:1314)..
Checking slave recovery environment settings..
Opening /data/lib/mysql/relay-log.info ... ok.
Relay log found at /data/lib/mysql, up to mysql-relay-bin.000006
Temporary relay log file is /data/lib/mysql/mysql-relay-bin.000006
Testing mysql connection and privileges.. done.
Testing mysqlbinlog output.. done.
Cleaning up test file(s).. done.
Wed Sep 3 22:27:43 2014 - [info] Executing command : apply_diff_relay_logs --command=test --slave_user='root' --slave_host=192.168.66.120 --slave_ip=192.168.66.120 --slave_port=3307 --workdir=/mha/appl --target_version=5.5.17-log --manager_version=0.55 --relay_log_info=/data/lib/mysqlb/relay-log.info --relay_dir=/data/lib/mysqlb/ --slave_pass=xxx
Wed Sep 3 22:27:43 2014 - [info] Connecting to concert@192.168.66.120(192.168.66.120:1314)..
Checking slave recovery environment settings..
Opening /data/lib/mysqlb/relay-log.info ... ok.
Relay log found at /data/lib/mysqlb, up to mysql-relay-bin.000005
Temporary relay log file is /data/lib/mysqlb/mysql-relay-bin.000005
Testing mysql connection and privileges.. done.
Testing mysqlbinlog output.. done.
Cleaning up test file(s).. done.
Wed Sep 3 22:27:44 2014 - [info] Slaves settings check done.
Wed Sep 3 22:27:44 2014 - [info]
192.168.66.88 (current master)
+--192.168.66.89
+--192.168.66.120
Wed Sep 3 22:27:44 2014 - [info] Checking replication health on 192.168.66.89..
Wed Sep 3 22:27:44 2014 - [info] ok.
Wed Sep 3 22:27:44 2014 - [info] Checking replication health on 192.168.66.120..
Wed Sep 3 22:27:44 2014 - [info] ok.
Wed Sep 3 22:27:44 2014 - [warning] master_ip_failover_script is not defined.
Wed Sep 3 22:27:44 2014 - [warning] shutdown_script is not defined.
Wed Sep 3 22:27:44 2014 - [info] Got exit code 0 (Not master dead).
MySQL Replication Health is OK.
OK!问题解决。

MySQL通過異步、半同步和組複製三種模式處理數據複製。 1)異步複製性能高但可能丟失數據。 2)半同步複製提高數據安全性但增加延遲。 3)組複製支持多主複製和故障轉移,適用於高可用性需求。

EXPLAIN語句可用於分析和提升SQL查詢性能。 1.執行EXPLAIN語句查看查詢計劃。 2.分析輸出結果,關注訪問類型、索引使用情況和JOIN順序。 3.根據分析結果,創建或調整索引,優化JOIN操作,避免全表掃描,以提升查詢效率。

使用mysqldump進行邏輯備份和MySQLEnterpriseBackup進行熱備份是備份MySQL數據庫的有效方法。 1.使用mysqldump備份數據庫:mysqldump-uroot-pmydatabase>mydatabase_backup.sql。 2.使用MySQLEnterpriseBackup進行熱備份:mysqlbackup--user=root--password=password--backup-dir=/path/to/backupbackup。恢復時,使用相應的命

MySQL慢查詢的主要原因包括索引缺失或不當使用、查詢複雜度、數據量過大和硬件資源不足。優化建議包括:1.創建合適的索引;2.優化查詢語句;3.使用分錶分區技術;4.適當升級硬件。

MySQL視圖是基於SQL查詢結果的虛擬表,不存儲數據。 1)視圖簡化複雜查詢,2)增強數據安全性,3)維護數據一致性。視圖是數據庫中的存儲查詢,可像表一樣使用,但數據動態生成。

mysqldiffersfromothersqldialectsinsyntaxforlimit,自動啟動,弦樂範圍,子征服和表面上分析。 1)MySqluessLipslimit,whilesqlserverusestopopandoraclesrontersrontsrontsrontsronnum.2)

MySQL分區能提升性能和簡化維護。 1)通過按特定標準(如日期範圍)將大表分成小塊,2)物理上將數據分成獨立文件,3)查詢時MySQL可專注於相關分區,4)查詢優化器可跳過不相關分區,5)選擇合適的分區策略並定期維護是關鍵。

在MySQL中,如何授予和撤銷權限? 1.使用GRANT語句授予權限,如GRANTALLPRIVILEGESONdatabase_name.TO'username'@'host';2.使用REVOKE語句撤銷權限,如REVOKEALLPRIVILEGESONdatabase_name.FROM'username'@'host',確保及時溝通權限變更。


熱AI工具

Undresser.AI Undress
人工智慧驅動的應用程序,用於創建逼真的裸體照片

AI Clothes Remover
用於從照片中去除衣服的線上人工智慧工具。

Undress AI Tool
免費脫衣圖片

Clothoff.io
AI脫衣器

Video Face Swap
使用我們完全免費的人工智慧換臉工具,輕鬆在任何影片中換臉!

熱門文章

熱工具

Safe Exam Browser
Safe Exam Browser是一個安全的瀏覽器環境,安全地進行線上考試。該軟體將任何電腦變成一個安全的工作站。它控制對任何實用工具的訪問,並防止學生使用未經授權的資源。

禪工作室 13.0.1
強大的PHP整合開發環境

mPDF
mPDF是一個PHP庫,可以從UTF-8編碼的HTML產生PDF檔案。原作者Ian Back編寫mPDF以從他的網站上「即時」輸出PDF文件,並處理不同的語言。與原始腳本如HTML2FPDF相比,它的速度較慢,並且在使用Unicode字體時產生的檔案較大,但支援CSS樣式等,並進行了大量增強。支援幾乎所有語言,包括RTL(阿拉伯語和希伯來語)和CJK(中日韓)。支援嵌套的區塊級元素(如P、DIV),

SublimeText3漢化版
中文版,非常好用

Atom編輯器mac版下載
最受歡迎的的開源編輯器