css基礎知識整理
阿新 • • 發佈：2021-01-20
MySQL主從配置
主配置（安裝完mysql的虛擬機器）
基礎配置：
# vi /etc/my.cnf
編輯配置檔案
log_bin=ljblinux1 # These are commonly set, remove the # and set as required. basedir = /usr/local/mysql datadir = /data/mysql port = 3306 server_id = 31 socket = /tmp/mysql.sock
# /etc/init.d/mysqld restart
重啟mysqld服務
[root@mysql1 mysql]# /etc/init.d/mysqld restart Shutting down MySQL.. SUCCESS! Starting MySQL. SUCCESS!
# mysqldump -uroot mysql > /tmp/mysql.sql
備份mysql庫（加入環境變數）
[root@mysql1 mysql]# mysqldump -uroot mysql > /tmp/mysql.sql bash: mysqldump: 未找到命令 [root@mysql1 mysql]# export PATH=$PATH:/usr/local/mysql/bin/ [root@mysql1 mysql]# mysqldump -uroot mysql > /tmp/mysql.sql
# mysql -uroot -e "create database ljb"
建立一個庫儲存資料
# mysql -urootljb< /tmp/mysql.sql
將mysql庫恢復成新建的庫，作為測試資料
資料庫配置
# mysql -uroot
進入資料庫（沒有密碼）
建立用作同步資料的使用者並賦予許可權
mysql> grant replication slave on *.* to 'repl' @192.168.117.33 identified by '123456'; Query OK, 0 rows affected (0.00 sec)
將表鎖住，保持表內資料不變
mysql> flush tables with read lock; Query OK,0 rows affected (0.01 sec)
顯示主機狀態
mysql> show master status; +------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | ljblinux1.000001 | 652397 | | | | +------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec)
從配置（安裝完mysql的虛擬機器）
基礎配置
# vi /etc/my.cnf
編輯配置檔案
basedir = /usr/local/mysql datadir = /data/mysql port = 3306 server_id = 33 socket = /tmp/mysql.sock
# /etc/init.d/mysqld restart
重啟mysqld服務
[root@mysql2 mysql]# /etc/init.d/mysqld restart Shutting down MySQL.. SUCCESS! Starting MySQL. SUCCESS!
# scp /tmp/mysql.sql [email protected]:/tmp/
在主上將檔案拷貝到從上，並在從上檢視檔案大小是否一致
[root@mysql1 mysql]# scp /tmp/mysql.sql root@192.168.117.33:/tmp/ The authenticity of host '192.168.117.33 (192.168.117.33)' can't be established. ECDSA key fingerprint is e7:b9:93:83:70:cb:d6:59:49:f8:56:65:ba:eb:aa:45. Are you sure you want to continue connecting (yes/no)? y Please type 'yes' or 'no': yes Warning: Permanently added '192.168.117.33' (ECDSA) to the list of known hosts. root@192.168.117.33's password: mysql.sql 100% 637KB 636.7KB/s 00:00 [root@mysql1 mysql]# ls -la /tmp/mysql.sql -rw-r--r--. 1 root root 651977 12月 31 21:47 /tmp/mysql.sql
# 進入資料庫 create database ljb"
//建立一個和主一樣的庫
[root@mysql2 mysql]# mysql -uroot Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server version: 5.6.35 MySQL Community Server (GPL) Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> create database ljb; Query OK, 1 row affected (0.00 sec)
將檔案內容匯入庫
[root@mysql2 mysql]# mysql -uroot ljb < /tmp/mysql.sql
資料庫配置
# mysql -uroot
進入資料庫（沒有密碼）
mysql> stop slave; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> change master to master_host='192.168.117.31',master_user='repl',master_password='123456',master_log_file='ljblinux1.000001',master_log_pos=652397; Query OK, 0 rows affected, 2 warnings (0.00 sec) mysql> start slave; Query OK, 0 rows affected (0.00 sec)
在主上執行解鎖表
mysql> unlock tables; Query OK, 0 rows affected (0.00 sec)
主從同步及相關配置引數
主從同步驗證：
從伺服器上操作並執行命令（防火牆關閉）：systemctl stop firewalld
進入資料庫
mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.117.31 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: ljblinux1.000001 Read_Master_Log_Pos: 652397 Relay_Log_File: mysql2-relay-bin.000002 Relay_Log_Pos: 283 Relay_Master_Log_File: ljblinux1.000001 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: 652397 Relay_Log_Space: 457 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: 31 Master_UUID: 779c463c-4b6d-11eb-995f-000c29cba4d3 Master_Info_File: /data/mysql/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it 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 1 row in set (0.00 sec) ERROR: No query specified
若出現Yes，如上圖狀態，即表示主從配置正常。
其中，主伺服器主要配置引數如下：
binlog-do-db= //僅同步指定的庫
binlog-ignore-db= //忽略指定的庫
從伺服器主要配置引數如下：
replicate_do_db=
replicate_ignore_db=
replicate_do_table=
replicate_ignore_table=
replicate_wild_do_table= //如test.%，支援萬用字元%
replicate_wild_ignore_table=
測試主從
主伺服器上
在主上進入資料庫
mysql> select count(*) from db; +----------+ | count(*) | +----------+ | 2 | +----------+ 1 row in set (0.00 sec) mysql> truncate table db; Query OK, 0 rows affected (0.00 sec) mysql> select count(*) from db; +----------+ | count(*) | +----------+ | 0 | +----------+ 1 row in set (0.00 sec)
從伺服器上
在從上進入資料庫
mysql> select count(*) from db; +----------+ | count(*) | +----------+ | 0 | +----------+ 1 row in set (0.00 sec)