MySQL 5.7 集群搭建

第 1 章     安装

1.1       MySQL5.7源码编译安装

环境:

操作系统:CentOS6.9, x86_64

1.1.1 MySQL源码包下载

社区版MySQL下载地址:

https://dev.mysql.com/downloads/mysql/

 

采用源码编译安装:

下载框中的版本。

 

下载时不用登录:

 

1.1.2 安装编译工具以及依赖包

卸载系统自带的mysql包:

[root@SSCVL0436 ~]# rpm -qa|grep -i mysql

mysql-libs-5.1.73-8.el6_8.x86_64

[root@SSCVL0436 ~]# rpm -emysql-libs-5.1.73-8.el6_8.x86_64

error: Failed dependencies:

       libmysqlclient.so.16()(64bit) is needed by (installed)postfix-2:2.6.6-8.el6.x86_64

       libmysqlclient.so.16(libmysqlclient_16)(64bit) is needed by (installed)postfix-2:2.6.6-8.el6.x86_64

       mysql-libs is needed by (installed) postfix-2:2.6.6-8.el6.x86_64

 

可以加上--nodeps选项单独删除mysql-libs:

rpm -e mysql-libs-5.1.73-8.el6_8.x86_64 --nodeps

 

注意事项:

这里采用源码编译安装,mysql-libs不卸载也没关系。

我并不打算将参数文件放在/etc目录下,所以,该目录下的my.cnf文件需要删除或重命名,以免干扰后续MySQLserver的启动。

 

 

安装编译工具以及依赖包:

yum -y install bison cmake gcc gcc-c++ libaio-develncurses ncurses-devel perl

 

安装后检查:

rpm -q bison         \

       cmake         \

       gcc           \

       gcc-c++       \

       libaio-devel  \

       ncurses       \

       ncurses-devel \

       perl

 

 

1.1.3 创建mysql账户

groupadd mysql

useradd -g mysql mysql

passwd mysql

 

配置mysql账户的系统资源使用限制(可选):

cat >> /etc/security/limits.conf  << EOF

 

mysql           soft    nproc  2047

mysql           hard    nproc  16384

mysql           soft    nofile 1024

mysql           hard    nofile 65536

 

EOF

 

 

配置mysql账户的环境变量

参考后续MySQL软件安装路径,配置PATH环境变量为:

exportPATH=/data/mysql/bin:$PATH

 

1.1.4 编译、安装

安装介质所在目录:

[root@SSCVL0436 soft]# pwd

/data/soft

[root@SSCVL0436 soft]# ll

total 47788

-rw-r--r-- 1 root root 48931457 Apr 1512:06 mysql-boost-5.7.21.tar.gz

 

解压:

[root@SSCVL0436 soft]# tar-xzf mysql-boost-5.7.21.tar.gz

[root@SSCVL0436 soft]# ll

total 47792

drwxr-xr-x 36 7161 31415     4096 Dec 28 11:56 mysql-5.7.21

-rw-r--r--  1 root root 48931457 Apr 15 12:06 mysql-boost-5.7.21.tar.gz

[root@SSCVL0436 soft]# chown -R root:root mysql-5.7.21

[root@SSCVL0436 soft]# ll

total 47792

drwxr-xr-x 36 root root     4096 Dec 28 11:56 mysql-5.7.21

-rw-r--r-- 1 root root 48931457 Apr 15 12:06 mysql-boost-5.7.21.tar.gz

 

创建临时目录bld:

[root@SSCVL0436 soft]# cdmysql-5.7.21

[root@SSCVL0436 mysql-5.7.21]# mkdir bld

[root@SSCVL0436 mysql-5.7.21]# cd bld

 

 

执行下述命令生成编译环境:

cmake ..-DCMAKE_INSTALL_PREFIX=/data/mysql \

-DSYSCONFDIR=/data/mysqldata\

-DMYSQL_DATADIR=/data/mysqldata/data\

-DMYSQL_UNIX_ADDR=/data/mysqldata/run/mysql.sock\

-DWITH_BLACKHOLE_STORAGE_ENGINE=1\

-DWITH_EXAMPLE_STORAGE_ENGINE=1\

-DWITH_FEDERATED_STORAGE_ENGINE=1\

-DWITH_PARTITION_STORAGE_ENGINE=1\

-DWITH_PERFSCHEMA_STORAGE_ENGINE=1\

-DWITH_BOOST=../boost\

-DWITH_INNODB_MEMCACHED=ON\

-DENABLED_LOCAL_INFILE=ON\

-DDEFAULT_CHARSET=utf8\

-DDEFAULT_COLLATION=utf8_general_ci\

-DCOMPILATION_COMMENT="MySQLServer (GPL)"

 

The InnoDB, MyISAM, MERGE, MEMORY, and CSVengines are mandatory (always compiled into the server) and need not beinstalled explicitly.

将软件目录与数据目录区分开来。

编译失败,删除bld目录中的所有内容即可重新编译。

 

cmake选项说明:

选项

说明

 

 

CMAKE_INSTALL_PREFIX

软件安装base目录,如:/usr/local/mysql

 

 

 

 

 

 

执行cmake的过程,就是配置编译环境的过程,执行完毕,结果如图所示:

 

 

编译MySQL:

[root@SSCVL0436 bld]# make -j 2

 

编译结束后的样子,没有报错:

注意:

磁盘空间不能太小,否则会导致编译失败。

[root@SSCVL0436 bld]# du -sh

4.9G   .

 

 

安装MySQL:

[root@SSCVL0436 bld]# makeinstall

 

安装完毕的样子,同样没有报错:

 

检查软件安装目录:

[root@SSCVL0436 bld]# cd /data/mysql

[root@SSCVL0436 mysql]# ll

total 80

drwxr-xr-x  2 root root 4096 Apr 16 10:27 bin

-rw-r--r--  1 root root 17987 Dec 28 11:46 COPYING

-rw-r--r--  1 root root 17987 Dec 28 11:46 COPYING-test

drwxr-xr-x  2 root root 4096 Apr 16 10:27 docs

drwxr-xr-x  3 root root 4096 Apr 16 10:27 include

drwxr-xr-x  4 root root 4096 Apr 16 10:27 lib

drwxr-xr-x  4 root root 4096 Apr 16 10:27 man

drwxr-xr-x 10 root root  4096 Apr 16 10:27 mysql-test

-rw-r--r--  1 root root 2478 Dec 28 11:46 README

-rw-r--r--  1 root root 2478 Dec 28 11:46 README-test

drwxr-xr-x 28 root root  4096 Apr 16 10:27 share

drwxr-xr-x 2 root root  4096 Apr 16 10:27support-files

 

注意:

如果安装目录不存在,安装时会自动创建。

 

1.1.5 建库

修改软件目录权限:

chown -R root:mysql /data/mysql

 

建立数据目录并修改权限:

mkdir -p/data/mysqldata/{run,data,tmp,binlog,logs}

chown -R mysql:mysql/data/mysqldata

 

1.1.5.1  创建MySQL参数文件

su - mysql

vi /data/mysqldata/my.cnf

 

[client]

port = 3306

socket = /data/mysqldata/run/mysql.sock

 

[mysqld]

#mysql server

server-id = 85

port = 3306

user = mysql

socket    =/data/mysqldata/run/mysql.sock

pid-file  =/data/mysqldata/run/mysql.pid

basedir   = /data/mysql

datadir   =/data/mysqldata/data

tmpdir    =/data/mysqldata/tmp

default-storage-engine = INNODB

character-set-server = utf8

explicit_defaults_for_timestamp = true

 

#buffer

max_connections = 1024

max_allowed_packet = 256M

max_heap_table_size = 256M

net_buffer_length = 8K

sort_buffer_size = 2M

join_buffer_size = 4M

read_buffer_size = 2M

read_rnd_buffer_size = 16M

 

#binlog

log-bin = /data/mysqldata/binlog/mysql-bin

binlog_cache_size = 32M

max_binlog_cache_size = 512M

max_binlog_size = 512M

binlog_format = mixed

expire-logs-days = 14

 

#error log

log-error = /data/mysqldata/logs/mysql-err.log

 

#query log

log_output = FILE

slow_query_log = 1

slow_query_log_file = /data/mysqldata/logs/slow_query.log

general_log = 0

general_log_file = /data/mysqldata/logs/general_query.log

 

#InnoDB

innodb_data_file_path = ibdata1:2048M:autoextend:max:10G

innodb_file_per_table = 1

innodb_log_file_size = 256M

innodb_log_files_in_group = 3

innodb_buffer_pool_size = 1024M

transaction_isolation = READ-COMMITTED

 

[mysqld_safe]

open_files_limit = 10240

 

[mysql]

default-character-set = utf8

 

 

mysqld选项说明:

选项

说明

 

 

explicit_defaults_for_timestamp

设置timestamp的列值为null,不会被设置为current timestamp。默认值为false,应该设置为true。

 

 

 

 

 

InnoDB选项说明:

选项

说明

 

 

innodb_buffer_pool_size

the memory area where InnoDB caches table and index data.

When the size of the buffer pool is greater than 1GB, setting innodb_buffer_pool_instances to a value greater than 1 can improve the scalability on a busy server.

推荐设置:物理内存的60%~80%

innodb_buffer_pool_instances

This option only takes effect when setting innodb_buffer_pool_size to 1GB or more.

默认值为8,当innodb_buffer_pool_size小于1GB时,默认值为1。

 

 

 

 

1.1.5.2  初始建库

[root@SSCVL0436 ~]# /data/mysql/bin/mysqld--defaults-file=/data/mysqldata/my.cnf --initialize --user=mysql--explicit_defaults_for_timestamp

 

在这里执行下面这个命令,explicit_defaults_for_timestamp选项不用放命令行,加入参数文件中即可:

[root@SSCVL0436 ~]# /data/mysql/bin/mysqld--defaults-file=/data/mysqldata/my.cnf --initialize --user=mysql

 

 

[root@SSCVL0436 ~]# cd /data/mysqldata

[root@SSCVL0436 mysqldata]# ll

total 24

drwxr-xr-x 2 mysql mysql 4096 Apr 1615:23 binlog

drwxr-xr-x 2 mysql mysql 4096 Apr 1615:24 data

drwxr-xr-x 2 mysql mysql 4096 Apr 1615:23 logs

-rw-rw-r-- 1 mysql mysql 1271 Apr 1615:22 my.cnf

drwxr-xr-x 2 mysql mysql 4096 Apr 1610:31 run

drwxr-xr-x 2 mysql mysql 4096 Apr 1615:24 tmp

[root@SSCVL0436 mysqldata]# ls *

my.cnf

 

binlog:

mysql-bin.000001  mysql-bin.index

 

data:

auto.cnf ib_buffer_pool  ibdata1  ib_logfile0 ib_logfile1  ib_logfile2  mysql performance_schema  sys

 

logs:

mysql-err.log  slow_query.log

 

run:

 

tmp:

[root@SSCVL0436 mysqldata]#

 

如果需要重新建库,那么保留my.cnf,其余目录内的文件全部删除:

cd /data/mysqldata

rm -rf */*

 

1.1.5.3  启动MySQL server

[root@SSCVL0436 ~]# su - mysql

[mysql@SSCVL0436 ~]$ mysqld_safe--defaults-file=/data/mysqldata/my.cnf

2018-04-16T09:03:30.390366Z mysqld_safeLogging to '/data/mysqldata/logs/mysql-err.log'.

2018-04-16T09:03:30.441253Z mysqld_safeStarting mysqld daemon with databases from /data/mysqldata/data

这是在前台启动。

 

放后台启动:

[mysql@SSCVL0436 ~]$ mysqld_safe--defaults-file=/data/mysqldata/my.cnf &

 

1.1.5.4  设置自动启动

复制mysql.server文件到自动启动目录:

[root@SSCVL0436 support-files]# pwd

/data/mysql/support-files

[root@SSCVL0436 support-files]# ll

total 24

-rw-r--r-- 1 root mysql   773 Dec 28 11:46 magic

-rwxr-xr-x 1 root mysql  1061 Apr 16 10:06 mysqld_multi.server

-rwxr-xr-x 1 root mysql   877 Apr 16 10:06 mysql-log-rotate

-rwxr-xr-x 1 root mysql 10550 Apr 1610:06 mysql.server

[root@SSCVL0436 support-files]# cp mysql.server /etc/rc.d/init.d/mysqld

[root@SSCVL0436 support-files]# ll/etc/rc.d/init.d/mysqld

-rwxr-xr-x 1 root root 10550 Apr 17 00:16/etc/rc.d/init.d/mysqld

 

添加到自动启动:

chkconfig--list|grep mysqld

chkconfig --add mysqld

chkconfig mysqld on

service mysqld status

 

[root@SSCVL0436 ~]# chkconfig --list|grepmysqld

[root@SSCVL0436 ~]# chkconfig --addmysqld

[root@SSCVL0436 ~]# chkconfig--list|grep mysqld

mysqld          0:off   1:off  2:on    3:on    4:on   5:on    6:off

[root@SSCVL0436 ~]#

[root@SSCVL0436 ~]# service mysqld status

MySQL is not running                                       [FAILED]

[root@SSCVL0436 ~]#

[root@SSCVL0436 ~]# service mysqld start

Starting MySQL.                                           [  OK  ]

[root@SSCVL0436 ~]# service mysqldstatus

MySQL running (10139)                                      [  OK  ]

 

查看进程:

[root@SSCVL0436 ~]# ps -ef|grep mysql

root     9585     1  000:28 pts/2    00:00:00 /bin/sh/data/mysql/bin/mysqld_safe --datadir=/data/mysqldata/data--pid-file=/data/mysqldata/run/mysql.pid

mysql   10139  9585  000:28 pts/2    00:00:00/data/mysql/bin/mysqld --basedir=/data/mysql --datadir=/data/mysqldata/data--plugin-dir=/data/mysql/lib/plugin --user=mysql--log-error=/data/mysqldata/logs/mysql-err.log --open-files-limit=10240--pid-file=/data/mysqldata/run/mysql.pid--socket=/data/mysqldata/run/mysql.sock --port=3306

 

1.1.5.5  问题处理

1.启动MySQL server时,错误日志中出现关于TIMESTAMP的告警

2018-04-16T09:03:30.665679Z 0 [Warning]TIMESTAMP with implicit DEFAULT value is deprecated. Please use--explicit_defaults_for_timestamp server option (see documentation for moredetails).

处理方法:

在MySQL参数文件中增加参数:

explicit_defaults_for_timestamp = true

 

参考:

MySQL 5.7中timestamp数据类型和explicit_defaults_for_timestamp参数:

http://www.ywnds.com/?p=8309

 

 

2.MySQL server启动之后,不用密码不能登录

[mysql@SSCVL0436 ~]$ mysql -uroot -p

Enter password:

ERROR 1045 (28000): Access denied for user'root'@'localhost' (using password: NO)

 

这是正常现象。在5.7版本中,安全策略有所调整,root账户不再像5.6一样可以使用空密码登录。当mysql初始启动时会为root账户随机生成一个密码,存储在log-error文件中:

[mysql@SSCVL0436 logs]$ pwd

/data/mysqldata/logs

[mysql@SSCVL0436 logs]$ cat mysql-err.log|grep password

2018-04-16T09:00:17.841880Z 1 [Note] Atemporary password is generated for root@localhost: V)3A5KtNevLj

2018-04-16T09:05:56.521500Z 2 [Note]Access denied for user 'root'@'localhost' (using password: NO)

 

使用上述密码进行登录:

[mysql@SSCVL0436 logs]$ mysql -uroot-p'V)3A5KtNevLj'

mysql: [Warning] Using a password on thecommand line interface can be insecure.

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 3

Server version: 5.7.21-log

 

Copyright (c) 2000, 2018, Oracle and/orits affiliates. All rights reserved.

 

Oracle is a registered trademark ofOracle Corporation and/or its

affiliates. Other names may betrademarks of their respective

owners.

 

Type 'help;' or '\h' for help. Type '\c'to clear the current input statement.

 

mysql> showdatabases;

ERROR 1820 (HY000): You must reset yourpassword using ALTER USER statement before executing this statement.

 

成功登录,但执行命令报错。

根据提示修改密码:

mysql> alter user'root'@'localhost' identified by 'elcar0123';

Query OK, 0 rows affected (0.00 sec)

 

mysql> show databases;

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

| Database           |

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

| information_schema |

| mysql              |

| performance_schema |

| sys                |

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

4 rows in set (0.00 sec)

 

密码修改后,命令即可正常执行。

 

1.2       拷贝安装

源码包在某个服务器上经过编译安装后,在后续同类型机器上,可直接进行拷贝安装。

 

1.2.1 安装编译工具以及依赖包

参考前述章节。

 

注意事项:

我并不打算将参数文件放在/etc目录下,所以,该目录下的my.cnf文件需要删除或重命名,以免干扰后续MySQLserver的启动。

 

1.2.2 创建mysql账户

参考前述章节。

 

注意事项:

mysql账户的uid和gid要和源服务器上的相同。

补充:uid, gid与源服务器不相同好像也没问题。

 

1.2.3 源端打包mysql安装目录

要以root账户来做。

[root@SSCVL0436 data]# id

uid=0(root) gid=0(root) groups=0(root)

[root@SSCVL0436 data]# pwd

/data

[root@SSCVL0436 data]# ll

total 28

drwx------  2 root root  16384 Apr 10 15:16lost+found

drwxr-xr-x 10 root  mysql 4096 Apr 16 10:27 mysql

drwxr-xr-x  7 mysql mysql 4096 Apr 16 23:54 mysqldata

drwxr-xr-x  3 root root   4096 Apr 16 09:54 soft

[root@SSCVL0436 data]# tar -cf mysql.tar mysql

[root@SSCVL0436 data]# ll

total 2021764

drwx------  2 root root       16384 Apr 10 15:16lost+found

drwxr-xr-x 10 root  mysql      4096 Apr 16 10:27 mysql

drwxr-xr-x  7 mysql mysql       4096 Apr 16 23:54 mysqldata

-rw-r--r--  1 root root  2070251520 Apr 17 00:57 mysql.tar

drwxr-xr-x 3 root  root        4096 Apr 16 09:54 soft

 

mysql.tar传至目标服务器:

[root@SSCVL0436 data]# scp mysql.tar10.64.20.86:/data

 

1.2.4 目标服务器上解包

要以root账户来解包。

 

[root@SSCVL0437 data]# id

uid=0(root) gid=0(root) groups=0(root)

[root@SSCVL0437 data]# pwd

/data

[root@SSCVL0437 data]# ll

total 2021752

drwx------ 2 root root      16384 Apr 10 15:41 lost+found

-rw-r--r-- 1 root root 2070251520 Apr 1700:59 mysql.tar

[root@SSCVL0437 data]# tar -xf mysql.tar

[root@SSCVL0437 data]# ll

total 2021756

drwx------  2 root root       16384 Apr 10 15:41 lost+found

drwxr-xr-x 10 root mysql       4096 Apr 16 10:27 mysql

-rw-r--r-- 1 root root  2070251520 Apr 1700:59 mysql.tar

 

1.2.5 建库

建立数据目录并修改权限:

mkdir -p/data/mysqldata/{run,data,tmp,binlog,logs}

chown -R mysql:mysql /data/mysqldata

 

从源服务器拷贝参数文件到目标服务器。

 

修改参数文件:

server-id = 86

修改此处即可。

 

注意:从这里开始的操作,与前述安装完全相同。

 

初始化建库:

[root@SSCVL0437 ~]# /data/mysql/bin/mysqld--defaults-file=/data/mysqldata/my.cnf --initialize --user=mysql

 

启动MySQL server(前台):

[root@SSCVL0437 mysqldata]# su - mysql

[mysql@SSCVL0437 ~]$ mysqld_safe--defaults-file=/data/mysqldata/my.cnf

2018-04-16T17:26:47.147454Z mysqld_safeLogging to '/data/mysqldata/logs/mysql-err.log'.

2018-04-16T17:26:47.213064Z mysqld_safeStarting mysqld daemon with databases from /data/mysqldata/data

 

设置自动启动:

略。

 

第 2 章     MySQL复制

2.1       全新环境构建异步复制

新构建的MySQL环境,里面没有应用账户,也没有应用数据库。

 

复制环境:

MySQL版本:MySQL5.7.21

Master Server: 10.64.22.95

Slave Server : 10.64.22.96

 

2.1.1 Master服务器配置

1.修改参数文件,启用binlog

 

相关参数:

[mysqld]

server-id = 95

log-bin = /data/mysqldata/binlog/mysql-bin

 

修改参数后,重启MySQL server。

若已配置,跳过该步骤。

 

2.创建复制账户

grant replication slave on *.* to'repl'@'10.64.22.96' identified by 'my_repl';

或者:

grant replication slave on *.* to'repl'@'10.64.22.%' identified by 'my_repl';

 

3.记录主库日志信息

[mysql@SSCVL0419 ~]$ mysql -uroot -p

mysql> show master status;

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

| File             | Position | Binlog_Do_DB |Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysql-bin.000009 |      447 |              |                  |                   |

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

1 row in set (0.00 sec)

 

 

2.1.2 Slave服务器配置

1.修改参数文件,启用binlog

 

相关参数:

[mysqld]

server-id = 96   ###与其值与master server不同

log-bin = /data/mysqldata/binlog/mysql-bin   ###可选,反向、级联复制需要

 

修改参数后,重启MySQL server。

若已配置,跳过该步骤。

 

2.创建复制账户

grant replication slave on *.* to'repl'@'10.64.22.95' identified by 'my_repl';

或者:

grant replication slave on *.* to'repl'@'10.64.22.%' identified by 'my_repl';

这一步对于slave来说不是必须的,用来方便主从切换。

 

3.Slave上设置日志读取信息

 

change master to

master_host='10.64.22.95',

master_port=3306,

master_user='repl',

master_password='my_repl',

master_log_file='mysql-bin.000009',

master_log_pos=447;

 

 

4.Slave上启动复制线程

 

mysql> start slave;

Query OK, 0 rows affected (0.00 sec)

 

2.1.3 查看复制状态

登录slave服务器。

 

mysql> show slave status\G

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

               Slave_IO_State: Waiting formaster to send event

                  Master_Host: 10.64.22.95

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000009

         Read_Master_Log_Pos: 447

               Relay_Log_File:SSCVL0420-relay-bin.000002

                Relay_Log_Pos: 320

       Relay_Master_Log_File:mysql-bin.000009

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

              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: 447

              Relay_Log_Space: 531

              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: 0

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: 95

                  Master_UUID:a2cad19a-41e2-11e8-8030-005056a83905

             Master_Info_File:/data/mysqldata/data/master.info

                    SQL_Delay: 0

         SQL_Remaining_Delay: NULL

     Slave_SQL_Running_State: Slave has read all relay log; waiting for moreupdates

           Master_Retry_Count: 86400

                  Master_Bind:

     Last_IO_Error_Timestamp:

    Last_SQL_Error_Timestamp:

               Master_SSL_Crl:

           Master_SSL_Crlpath:

           Retrieved_Gtid_Set:

            Executed_Gtid_Set:

                Auto_Position: 0

        Replicate_Rewrite_DB:

                 Channel_Name:

           Master_TLS_Version:

1 row in set (0.00 sec)

 

字段说明:

字段

说明

Slave_IO_Running

IO线程状态

Master_Log_File

IO线程正在读取master库上哪个binlog

Read_Master_Log_Pos

IO线程正在读取master库上该binlog的哪个位置点

Slave_SQL_Running

SQL线程状态

Relay_Master_Log_File

SQL线程正在应用master库的哪个binlog

Exec_Master_Log_Pos

SQL线程正在应用master库该binlog的哪个位置点

Seconds_Behind_Master

Slave落后Master多少秒

 

 

2.1.4 注意事项

1.主从数据库版本要一样。

 

2.主从server-uuid要不一样

 

[mysql@SSCVL0437 data]$ pwd

/data/mysqldata/data

[mysql@SSCVL0437 data]$ cat auto.cnf

[auto]

server-uuid=97db2c88-4199-11e8-8afb-005056a836e9

 

3.如果不是全新环境,MySQL环境中已有应用账户、应用数据,则还需要数据导出、导入,请参考其他文档。

 

2.1.5 复制测试

1.Master上操作:

 

create database lyqiu;

 

use lyqiu;

 

create table test(

id int(11) not null auto_increment,

name varchar(100) not null,

dt datetime,

primary key (id)

) engine=innodb auto_increment=2 defaultcharset=utf8;

 

insert into test(name,dt) values('abc',now());  ###默认自动提交

 

mysql> select * from test;

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

| id | name | dt                  |

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

| 2 | abc  | 2018-04-18 00:10:31 |

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

1 row in set (0.00 sec)

 

 

2.Slave上检查:

 

mysql> show databases;

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

| Database           |

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

| information_schema |

| lyqiu              |

| mysql              |

| performance_schema |

| sys                |

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

5 rows in set (0.00 sec)

 

mysql> use lyqiu;

Reading table information for completionof table and column names

You can turn off this feature to get aquicker startup with -A

 

Database changed

mysql> show tables;

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

| Tables_in_lyqiu |

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

| test            |

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

1 row in set (0.00 sec)

 

mysql> select * from test;

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

| id | name | dt                  |

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

| 2 | abc  | 2018-04-18 00:10:31 |

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

1 row in set (0.00 sec)

 

 

2.2       常用操作

2.2.1 主库

查看主库binlog状态:

mysql> show master status;

 

 

查看master有多少个slave:

mysql> show slave hosts;

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

| Server_id | Host | Port | Master_id |Slave_UUID                           |

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

|       86 |      | 3306 |        85 | 97db2c88-4199-11e8-8afb-005056a836e9|

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

1 row in set (0.00 sec)

 

 

查看主库binlog:

mysql> show binary logs;

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

| Log_name         | File_size |

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

| mysql-bin.000001 |       177 |

| mysql-bin.000002 |       421 |

| mysql-bin.000003 |       177 |

| mysql-bin.000004 |       177 |

| mysql-bin.000005 |       177 |

| mysql-bin.000006 |       177 |

| mysql-bin.000007 |       177 |

| mysql-bin.000008 |      1835 |

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

8 rows in set (0.00 sec)

 

 

查看binlog中的事件:

mysql> show binlog events in'mysql-bin.000008';

 

 

查看进程:

 

mysql> show processlist\G

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

    Id: 6

  User: repl

  Host: 10.64.20.86:48322

    db: NULL

Command: Binlog Dump

  Time: 33579

 State: Master has sent all binlog to slave; waiting for more updates

  Info: NULL

*************************** 2. row***************************

    Id: 7

  User: root

  Host: localhost

    db: NULL

Command: Query

  Time: 0

 State: starting

  Info: show processlist

2 rows in set (0.00 sec)

 

 

2.2.2 从库

查看从库复制状态:

mysql> show slave status\G

 

注意可能会过滤mysql.*之类的操作。

 

 

启停复制:

mysql> start slave;

mysql> stop slave;

 

 

查看进程:

mysql> show processlist\G

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

    Id: 3

  User: system user

   Host:

    db: NULL

Command: Connect

  Time: 33799

 State: Waiting for master to send event

  Info: NULL

*************************** 2. row***************************

    Id: 4

  User: system user

   Host:

    db: NULL

Command: Connect

  Time: 33480

 State: Slave has read all relay log; waiting for more updates

  Info: NULL

*************************** 3. row***************************

    Id: 5

  User: root

  Host: localhost

    db: NULL

Command: Query

  Time: 0

 State: starting

  Info: show processlist

3 rows in set (0.00 sec)

 


你可能感兴趣的:(技术,Java,linux)