搜索

MySQL-Xenon高可用

马哥Linux运维

共 9586字，需浏览 20分钟

 · 2024-05-19


在MySQL5.5及以下传统复制的时代，MHA在MySQL高可用应用中非常成熟，在MySQL5.6的GTID时代开启以后，MHA却没有与新的MySQL一起顺应潮流，MHA最近一次发版是2018年。于是RadonDB开发团队研发并开源新一代MySQL集群高可用工具。基于Raft协议进行无中心化选主，实现主从秒级切换；基于semi-sync机制，保障数据不丢失，实现数据强一致性。并结合MySQL5.7及以上版本并行复制特性，实现binlog并行回放那个，大大降低从库延迟。

代码托管：https://github.com/radondb/xenon

Xenon 实验环境

  • master db01 192.168.3.112

  • slave db02 192.168.3.113

  • salve db03 192.168.3.114

1、配置基于增强半同步的主从复制，配置过程详见《MySQL-主从复制》中。

2、三台主机安装 xtrabackup

# rpm -ivh percona-xtrabackup-80-8.0.13-1.el7.x86_64.rpm

3、三台主机配置互信，免密ssh登录

4、三台主机安装 go 环境

go 下载地址：https://golang.google.cn/dl/

# tar -zxvf go1.14.8.linux-amd64.tar.gz -C /opt/# vim /etc/profileexport GOPATH=/opt/go/binexport PATH=$PATH:$GOPATH

5、安装Xenon

下载地址：https://github.com/radondb/xenon/

# unzip xenon-master.zip# make

6、三台主机配置 Xenon

# mkdir /opt/xenon# cp -r /root/xenon-master/bin/ /opt/xenon/# mkdir /opt/xenon/etc# cp /root/xenon-master/conf/xenon-sample.conf.json /opt/xenon/etc/xenon.json# echo "/opt/xenon/etc/xenon.json" > /opt/xenon/bin/config.path# chown mysql.mysql /opt/xenon/ -R

修改 xenon.json 文件

# more /opt/xenon/etc/xenon.json {  "server":  {    "endpoint":"192.168.3.114:8801"  },
  "raft":  {    "meta-datadir":"raft.meta",    "leader-start-command":"sudo /sbin/ip a a 192.168.3.110/24 dev ens33 && arping -c 3 -A 192.168.3.110 -I ens33",    "leader-stop-command":"sudo /sbin/ip a d 192.168.3.110/24 dev ens33"  },
  "mysql":  {    "admin":"root",    "version":"mysql80",    "passwd":"123",    "host":"192.168.3.114",    "port":3306,    "basedir":"/opt/mysql",    "defaults-file":"/opt/mysql/.my.cnf",                "ping-timeout":1000,                "master-sysvars":"tokudb_fsync_log_period=default;sync_binlog=default;innodb_flush_log_at_trx_commit=default",                "slave-sysvars" : "tokudb_fsync_log_period=1000;sync_binlog=1000;innodb_flush_log_at_trx_commit=2"  },
  "replication":  {    "user":"repl",    "passwd":"repl"  },
  "backup":  {    "ssh-host":"192.168.3.114",    "ssh-user":"root",    "ssh-passwd":"root123",    "basedir":"/opt/mysql",    "backupdir":"/opt/mysql/data",    "xtrabackup-bindir":"/bin",    "max-allowed-local-trx-count": 1000,                "backup-use-memory": "1GB",                "backup-parallel": 4
  },
  "rpc":  {    "request-timeout":500  },
  "log":  {    "level":"INFO"  }}

三台主机启动 xenon ，并添加节点。官方建议Xenon和MySQL使用同一用户启动。

以普通用户启动要配置sudo

## NOPASSWD 免输入密码sudo，不加此选项，则启动失败# visudomysql   ALL=(ALL)       NOPASSWD: /usr/sbin/ip

在 mysql 用户下启动，xenon会自动拉起mysql进程服务

# su - mysql$ nohup /opt/xenon/bin/xenon -c /opt/xenon/etc/xenon.json > /opt/xenon/xenon.log 2>&1 &$ ./xenoncli cluster add 192.168.3.112:8801,192.168.3.113:8801,192.168.3.114:8801

查看集群状态

$ ./xenoncli cluster status+--------------------+-------------------------------+---------+---------+--------------------------+---------------------+----------------+--------------------+|         ID         |             Raft              | Mysqld  | Monitor |          Backup          |        Mysql        | IO/SQL_RUNNING |      MyLeader      |+--------------------+-------------------------------+---------+---------+--------------------------+---------------------+----------------+--------------------+| 192.168.3.112:8801 | [ViewID:3 EpochID:0]@LEADER   | RUNNING | ON      | state:[NONE]␤            | [ALIVE] [READWRITE] | [true/true]    | 192.168.3.112:8801 ||                    |                               |         |         | LastError:               |                     |                |                    |+--------------------+-------------------------------+---------+---------+--------------------------+---------------------+----------------+--------------------+| 192.168.3.113:8801 | [ViewID:3 EpochID:0]@FOLLOWER | RUNNING | ON      | state:[NONE]␤            | [ALIVE] [READONLY]  | [true/true]    | 192.168.3.112:8801 ||                    |                               |         |         | LastError:               |                     |                |                    |+--------------------+-------------------------------+---------+---------+--------------------------+---------------------+----------------+--------------------+| 192.168.3.114:8801 | [ViewID:3 EpochID:0]@FOLLOWER | RUNNING | ON      | state:[NONE]␤            | [ALIVE] [READONLY]  | [true/true]    | 192.168.3.112:8801 ||                    |                               |         |         | LastError:               |                     |                |                    |+--------------------+-------------------------------+---------+---------+--------------------------+---------------------+----------------+--------------------+$ ./xenoncli cluster mysql+--------------------+----------+-------+-----------+------------------------+----------------+----------------+------------+|         ID         |   Raft   | Mysql |  Option   |  Master_Log_File/Pos   | IO/SQL_Running | Seconds_Behind | Last_Error |+--------------------+----------+-------+-----------+------------------------+----------------+----------------+------------+| 192.168.3.112:8801 | LEADER   | ALIVE | READWRITE | [mysql-bin.000008/388] | [true/true]    |              0 |            |+--------------------+----------+-------+-----------+------------------------+----------------+----------------+------------+| 192.168.3.113:8801 | FOLLOWER | ALIVE | READONLY  | [mysql-bin.000008/388] | [true/true]    |              0 |            |+--------------------+----------+-------+-----------+------------------------+----------------+----------------+------------+| 192.168.3.114:8801 | FOLLOWER | ALIVE | READONLY  | [mysql-bin.000008/388] | [true/true]    |              0 |            |+--------------------+----------+-------+-----------+------------------------+----------------+----------------+------------+
关闭集群``` shell# ./xenoncli mysql stopmonitor# ./xenoncli mysql shutdown# pkill xenon

Xenon 备份

$ /opt/xenon/bin/xenoncli mysql backup --to=/opt/mysql/9876 2023/06/18 15:48:41.643361 callx.go:92:       [WARNING]   get.client.error[dial tcp 192.168.3.113:8801: connect: connection refused] 2023/06/18 15:48:41.643473 callx.go:163:       [WARNING]   get.client.error[dial tcp 192.168.3.113:8801: connect: connection refused] 2023/06/18 15:48:41.652513 callx.go:183:       [WARNING]   best.slave.can't.found.set.to.leader[192.168.3.112:8801] 2023/06/18 15:48:41.652531 mysql.go:562:       [WARNING]   S1-->found.the.best.backup.host[192.168.3.112:8801].... 2023/06/18 15:48:41.783611 mysql.go:576:       [WARNING]   S2-->rm.and.mkdir.backupdir[/opt/mysql/9876] 2023/06/18 15:48:41.783637 mysql.go:581:       [WARNING]   S3-->xtrabackup.begin.... 2023/06/18 15:48:41.784505 callx.go:442:       [WARNING]   rebuildme.backup.req[&{From: BackupDir:/opt/mysql/9876 SSHHost:192.168.3.114 SSHUser:mysql SSHPasswd:mysql SSHPort:22 IOPSLimits:100000 XtrabackupBinDir:/usr/bin}].from[192.168.3.112:8801] 2023/06/18 15:48:42.804183 common.go:41:       [PANIC]   rsp[cmd.outs.[completed OK!].found[0]!=expects[1]] != [OK]panic:    [PANIC]   rsp[cmd.outs.[completed OK!].found[0]!=expects[1]] != [OK]
goroutine 1 [running]:xbase/xlog.(*Log).Panic(0xc0000ec170, 0x8dd965, 0xf, 0xc0000e1d68, 0x1, 0x1)  /root/xenon-master/src/xbase/xlog/xlog.go:164 +0x153cli/cmd.RspOK(...)  /root/xenon-master/src/cli/cmd/common.go:41cli/cmd.mysqlDoBackupCommandFn(0xc0000fe000, 0xc0000ec200, 0x0, 0x1)  /root/xenon-master/src/cli/cmd/mysql.go:584 +0x481vendor/github.com/spf13/cobra.(*Command).execute(0xc0000fe000, 0xc0000ec1e0, 0x1, 0x1, 0xc0000fe000, 0xc0000ec1e0)  /root/xenon-master/src/vendor/github.com/spf13/cobra/command.go:603 +0x22evendor/github.com/spf13/cobra.(*Command).ExecuteC(0xc7f800, 0x1, 0xc0000e1f78, 0x40746f)  /root/xenon-master/src/vendor/github.com/spf13/cobra/command.go:689 +0x2bcvendor/github.com/spf13/cobra.(*Command).Execute(...)  /root/xenon-master/src/vendor/github.com/spf13/cobra/command.go:648main.main()  /root/xenon-master/src/cli/cli.go:43 +0x31

从输出日志信息看是备份失败，经排查是因为xenon.json配置中 mysql 部分的 host 参数导致。

   

    
    
     
  • 
     
  • 
     
  • 
     
  • 
     
  • 
     
  • 
     
  • 
     
  • 
     
  • 
     
  • 
     
  • 
     
  • 
     
  • 
    

    
  "mysql":  {    "admin":"root",    "version":"mysql80",    "passwd":"123",    "host":"192.168.3.114",     # 设置为主机IP地址，设置为localhost导致备份失败    "port":3306,    "basedir":"/opt/mysql",    "defaults-file":"/opt/mysql/.my.cnf",                "ping-timeout":1000,                "master-sysvars":"tokudb_fsync_log_period=default;sync_binlog=default;innodb_flush_log_at_trx_commit=default",                "slave-sysvars" : "tokudb_fsync_log_period=1000;sync_binlog=1000;innodb_flush_log_at_trx_commit=2"  },

链接：https://www.cnblogs.com/zbc230/p/17486690.html

（版权归原作者所有，侵删）

浏览 71
点赞
评论
收藏
分享

手机扫一扫分享

举报
评论
图片
表情
推荐
高可用MySQL
高可用MySQL
0
高可用方法论！
AlwaysBeta
0
高可用MySQL
《高可用mysql:构建健壮的数据中心》是“mysql high availability”的中文翻
高可用MySQL
0
高可用服务之Keepalived高可用LVS集群
java1234
0
MHAMySQL 高可用解决方案
MHA（Master High Availability）目前在 MySQL 高可用方面是一个相对成
MHAMySQL 高可用解决方案
0
CorosyncLinux高可用集群
Coreosync在传递信息的时候可以通过一个简单的配置文件来定义信息传递的方式和协议等。它是一个新兴的软件，2008年推出，但其实它并不是一个真正意义上的新软件，在2002年的时候有一个项目Open
CorosyncLinux高可用集群
0
高可用 兜底方案
JAVA乐园
0
Prometheus 高可用方案
杰哥的IT之旅
0
Prometheus 高可用方案
开源Linux
0
CorosyncLinux高可用集群
Coreosync在传递信息的时候可以通过一个简单的配置文件来定义信息传递的方式和协议等。它是一个新
CorosyncLinux高可用集群
0
点赞
评论
收藏
分享

手机扫一扫分享

举报