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mysql主库从库在同一台服务器_MySQL数据库的主从配置(多主对一从)

發(fā)布時(shí)間：2024/7/23 数据库 25 豆豆

生活随笔收集整理的這篇文章主要介紹了 mysql主库从库在同一台服务器_MySQL数据库的主从配置(多主对一从) 小編覺(jué)得挺不錯(cuò)的,現(xiàn)在分享給大家,幫大家做個(gè)參考.

一、實(shí)驗(yàn)環(huán)境部署

主服務(wù)器 192.168.18.42 端口3306? ==》從服務(wù)器 192.168.18.44 端口 3306

主服務(wù)器 192.168.18.43 端口3306? ==》從服務(wù)器 192.168.18.44 端口 3307

##數(shù)據(jù)庫(kù)，已經(jīng)安裝mysql服務(wù)，安裝部分略。從服務(wù)器上的多個(gè)mysql實(shí)例，請(qǐng)看另一篇帖子《用mysql_multi 實(shí)現(xiàn)一臺(tái)機(jī)器跑多臺(tái)mysql 》

二、部署服務(wù)器

1.在兩臺(tái)主服務(wù)器上賦予從機(jī)權(quán)限，有多臺(tái)叢機(jī)，就執(zhí)行多次(我們這里兩臺(tái)主庫(kù)使用統(tǒng)一帳號(hào)密碼)。

mysql> grant replication slave on *.* to 'backup'@'192.168.18.44' identified by '123456';

Query OK, 0 rows affected (0.00 sec)

2.在主服務(wù)器上配置my.cnf

vi /etc/my.cnf

server-id = 1

log-bin = mysql-bin? #保證binlog可讀

read-only?= 0? #主機(jī)，讀寫都可以

#binlog-do-db?= test?? #需要備份數(shù)據(jù)，多個(gè)寫多行，不寫全部都備份

binlog-ignore-db = mysql #不需要備份的數(shù)據(jù)庫(kù)，多個(gè)寫多行

編輯后重啟數(shù)據(jù)庫(kù) # service mysqld restart

3.配置從庫(kù)服務(wù)器的my.cnf

vi /etc/my.cnf

[mysqld_multi]

mysqld = /mysql/bin/mysqld_safe

mysqladmin = /mysql/bin/mysqladmin

[mysqld1]

port??? = 3306

socket? = /tmp/mysql3306.sock

pid-file = /data/mysql/data1/mysql3306.pid

datadir = /data/mysql/data1

skip-name-resolve

log-bin = mysql-bin-3306

log_slave_updates

expire_logs_days = 7

log-error = /data/mysql/data1/mysql3306.err

log_slow_queries = mysql3306-slow.log

long_query_time = 3

query_cache_size = 64M

query_cache_limit = 2M

slave-net-timeout = 10

server-id = 2???????????????????? #server id 不要與主庫(kù)的重復(fù)

master-host = 192.168.18.42??????? #對(duì)應(yīng)主庫(kù)的 ip地址

master-user = backup?????????????? # slave 帳號(hào)

master-password = 123456?????????? # 密碼

master-port = 3306???????????????? #主庫(kù)端口

replicate-ignore-db=mysql?????????? #跳過(guò)不備份的庫(kù)

master-info-file = master.1842.info

master-connect-retry = 10

relay-log = relay-bin-1842????????? #中繼日志

relay-log-index = relay-bin-1842

relay-log-info-file = relay-log-1842.info

default-character-set=gbk

innodb_data_home_dir = /data/mysql/data1

innodb_data_file_path = ibdata1:50M:autoextend

innodb_log_group_home_dir = /data/mysql/data1

innodb_buffer_pool_size = 3072M

innodb_file_per_table

innodb_open_files = 800

#innodb_flush_method = O_DIRECT

innodb_flush_method = O_DSYNC

skip-locking

key_buffer = 32M

max_allowed_packet = 16M

table_cache = 1024

sort_buffer_size = 8M

net_buffer_length = 8M

read_buffer_size = 2M

read_rnd_buffer_size = 8M

myisam_sort_buffer_size = 32M

max_connections = 100

read_only

wait_timeout=288000

interactive_timeout=288000

log-bin-trust-function-creators=1

replicate-ignore-db = test

replicate-ignore-table = mysql.columns_priv

replicate-ignore-table = mysql.host

replicate-ignore-table = mysql.db

replicate-ignore-table = mysql.procs_priv

replicate-ignore-table = mysql.tables_priv

replicate-ignore-table = mysql.user

[mysqld2]

port??? = 3307

socket? = /tmp/mysql3307.sock

pid-file = /data/mysql/data2/mysql3307.pid

datadir = /data/mysql/data2

skip-name-resolve

log-bin = mysql-bin-3307

log_slave_updates

expire_logs_days = 7

log-error = /data/mysql/data1/mysql3307.err

log_slow_queries = mysql3307-slow.log

long_query_time = 3

query_cache_size = 64M

query_cache_limit = 2M

slave-net-timeout = 10

server-id = 2???????????????????? #server id 不要與主庫(kù)的重復(fù)

master-host = 192.168.18.43??????? #對(duì)應(yīng)主庫(kù)的 ip地址

master-user = backup?????????????? # slave 帳號(hào)

master-password = 123456?????????? # 密碼

master-port = 3306???????????????? #主庫(kù)端口

replicate-ignore-db=mysql?????????? #跳過(guò)不備份的庫(kù)

master-info-file = master.1843.info

master-connect-retry = 10

relay-log = relay-bin-1843

relay-log-index = relay-bin-1843

relay-log-info-file = relay-log-1843.info

default-character-set=gbk

innodb_data_home_dir = /data/mysql/data2

innodb_data_file_path = ibdata1:50M:autoextend

innodb_log_group_home_dir = /data/mysql/data2

innodb_buffer_pool_size = 3072M

innodb_file_per_table

innodb_open_files = 800

#innodb_flush_method = O_DIRECT

innodb_flush_method = O_DSYNC

skip-locking

key_buffer = 32M

max_allowed_packet = 16M

table_cache = 1024

sort_buffer_size = 8M

net_buffer_length = 8M

read_buffer_size = 2M

read_rnd_buffer_size = 8M

myisam_sort_buffer_size = 32M

max_connections = 100

read_only

wait_timeout=288000

interactive_timeout=288000

log-bin-trust-function-creators=1

replicate-ignore-db = test

replicate-ignore-table = mysql.columns_priv

replicate-ignore-table = mysql.host

replicate-ignore-table = mysql.db

replicate-ignore-table = mysql.procs_priv

replicate-ignore-table = mysql.tables_priv

replicate-ignore-table = mysql.user

# 因?yàn)閳D方便就把參數(shù)全部抓出來(lái)了對(duì)主從有用的也就標(biāo)注的幾個(gè)

4.配置完成后重啟大從服務(wù)器

[root@localhost data1]# mysqld_multi --config-file=/etc/my.cnf --user=root --password=123456 report 1,2

Reporting MySQL servers

MySQL server from group: mysqld1 is running

MySQL server from group: mysqld2 is running

5.在從庫(kù)上進(jìn)行chang master ；

1).在date1上

mysql -uroot -p -S /tmp/mysql3306.sock

mysql> stop slave;

Query OK, 0 rows affected (0.00 sec)

mysql> CHANGE MASTER TO

-> MASTER_HOST='192.168.18.43',

-> MASTER_PORT=3306,

-> MASTER_USER='backup',

-> MASTER_PASSWORD='123456'

Query OK, 0 rows affected (0.05 sec)

mysql> start slave;

Query OK, 0 rows affected (0.00 sec)

2)。在date2上

mysql -uroot -p -S /tmp/mysql3307.sock

mysql> stop slave;

Query OK, 0 rows affected (0.00 sec)

mysql> CHANGE MASTER TO

-> MASTER_HOST='192.168.18.42',

-> MASTER_PORT=3306,

-> MASTER_USER='backup',

-> MASTER_PASSWORD='123456'

Query OK, 0 rows affected (0.05 sec)

mysql> start slave;

Query OK, 0 rows affected (0.00 sec)

三、驗(yàn)證：

1.在大從服務(wù)器上

show slave status\G;

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

2.在主庫(kù)創(chuàng)建數(shù)據(jù)庫(kù)(18.43上)

mysql> create database haifengtest;

Query OK, 1 row affected (0.00 sec)

mysql> show databases;

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

| Database?????????? |

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

| information_schema |

| haifengtest??????? |

| mysql????????????? |

| test?????????????? |

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

4 rows in set (0.00 sec)

從庫(kù)查看 (mysql3307.sock上)

mysql> show databases;

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

| Database?????????? |

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

| information_schema |

| haifengtest??????? |

| mysql????????????? |

| test?????????????? |

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

4 rows in set (0.00 sec)

四、一種常見(jiàn)的問(wèn)題。

在show slave status\G；時(shí)發(fā)現(xiàn)下面的問(wèn)題，(因?yàn)槲沂孪仍趶纳蟿?chuàng)建了該庫(kù))

Relay_Master_Log_File: mysql-bin.000005

Slave_IO_Running: Yes

Slave_SQL_Running: No

Replicate_Do_DB:

Replicate_Ignore_DB: mysql

Replicate_Do_Table:

Replicate_Ignore_Table:

Replicate_Wild_Do_Table:

Replicate_Wild_Ignore_Table:

Last_Errno: 1007

Last_Error: Error 'Can't create database 'haifengtest'; database exists' on query. Default database: 'haifengtest'. Query: 'create database haifengtest'

如果Replication在Slave上出現(xiàn)上面錯(cuò)誤而停止，一般都期望Slave能忽略這個(gè)錯(cuò)誤，繼續(xù)進(jìn)行同步，而不是重新啟動(dòng)Slave。

這時(shí)可以使用 SQL_SLAVE_SKIP_COUNTER

mysql> SET GLOBAL SQL_SLAVE_SKIP_COUNTER = 1;

Query OK, 0 rows affected (0.00 sec)

mysql> start slave;

Query OK, 0 rows affected (0.00 sec)

在驗(yàn)證一次

show slave status\G;

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

ok 搞定。。。。

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