全部代碼,寫在後面吧!
全部的代碼在後面。
1、安裝mysql
先rz命令上傳一下!出現未響應是很正常的情況!等會就好啦。
ls查看一下,已經出現啦~
xz -d mysql-8.0.13-linux-glibc2.12-x86_64.tar.xz
這個解壓不顯示過程。
成功! 變成這個名字啦:mysql-8.0.13-linux-glibc2.12-x86_64.tar
tar -xvf mysql-8.0.13-linux-glibc2.12-x86_64.tar
將解壓後的文件夾拷貝到/usr/local/並重命名爲mysql
mv -f mysql-5.7.10-linux-glibc2.5-x86_64 /usr/local/mysql
2、查看系統是否有libaio包,如果沒有無法運行mysql數據庫
rpm -qa | grep libaio
libaio-0.3.107-10.el6.x86_64 //表示已經安裝
已經存在啦!
3、建立mysql用戶和用戶組
useradd -s /sbin/nologin -M mysql
4、修改mysql文件夾的屬主和屬組爲mysql
進入有mysql的文件夾,修改.
chown -R mysql:mysql mysql
5、初始化數據庫,啓動mysql/bin目錄下的mysqld
8.0版本:
進入bin目錄,有啓動項的那個!
./mysqld --initialize --user=mysql
注意保存初始化mysql數據庫密碼:
運行完成後注意最後一句,這是mysql數據庫自動生成的root密碼,一定要記錄下來
6、配置數據庫
cp /usr/local/mysql/support-files/my-default.cnf /etc/my.cnf
或者直接進入/etc/my.cnf進行配置即可!
在實驗環境下,按下面的內容配置mysql即可:
vim /etc/my.cnf
要用英文輸入法來複制纔可以!
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
#mysql數據庫文件夾所在位置
datadir = /var/lib/mysql
#mysql數據庫的數據文件所在位置
# port = .....
# server_id = .....
socket = /var/lib/mysql/mysql.sock
#mysql sock位置
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
character-set-server=utf8
#修改mysql服務器默認的字符集
#此句不是必須
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[client]
socket = /var/lib/mysql/mysql.sock
default-character-set=utf8
#符號開頭的沒必要複製上去!
7、啓動數據庫
所有版本通用:
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
service mysqld start
數據啓動完畢
8、連接測試數據庫
cd /usr/local/mysql/bin
./mysql -u root -p
現在忘記密碼豈不是尷尬啦~還好有備份!
輸入密碼,成功進入數據庫!
修改密碼:
ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
分號不要忘記!
9、修改環境變量和ld.so.conf
將含有mysql命令的目錄添加到環境變量
# vim /etc/profile
PATH=/usr/local/mysql/bin:$PATH
另外一個:
#export PATH
在文本最後添加一下環境變量
將mysql目錄下的lib目錄添加到ld.so.conf文件
#vim /etc/ld.so.conf
include /usr/local/mysql/lib/
添加,不是覆蓋刪除!
保存退出後輸入
ldconfig
ldconfig 命令的用途,主要是在默認搜尋目錄(/lib和/usr/lib)以及動態庫配置文件/etc/ld.so.conf內所列的目錄下,搜索出可共享的動態 鏈接庫(格式如前介紹,lib.so),進而創建出動態裝入程序(ld.so)所需的連接和緩存文件.緩存文件默認爲 /etc/ld.so.cache,此文件保存已排好序的動態鏈接庫名字列表**
從服務器也要安裝MySQL,但是主從配置就有區別啦!
主從配置:
mysql主服務器配置:
1、修改my.cnf,添加
[mysqld]
log-bin=mysql-bin
server-id=1
2、重啓mysql服務
service mysqld restart
systemctl restart mysqld.service
重啓的時候出問題啦,需要安裝一個東西!
我寫的:https://blog.csdn.net/weixin_42859280/article/details/84574205
3、在mysql數據庫中,建立用戶同步數據庫的賬號:
1、mysql主服務器建立用戶並賦予權限
要先登錄MySQL纔可以進行這個操作!
cd /usr/local/mysql/bin
./mysql -u root -p
create user 'repl' identified by '123456';
ALTER USER 'repl'@'%' IDENTIFIED BY '123456';
flush privileges;
GRANT replication slave ON *.* TO 'repl'@'%';
GRANT ALL privileges ON *.* TO 'repl'@'%';
示例:
查看用戶和遠程主機連接設置
select host,user from user;
查看mysql主服務器日誌:
show master status
show master status\G
試試同步數據!
關掉防火牆!
mysql從服務器配置:
所有版本通用
1、修改my.cnf,添加
[mysqld]
log-bin=mysql-bin
server-id=2
2、重啓mysql.server服務
service mysqld restart
systemctl restart mysqld.service
重啓的時候出問題啦,需要安裝一個東西!
我寫的:https://blog.csdn.net/weixin_42859280/article/details/84574205
3、在從服務器設置主服務器,實現主從配置
登錄:
cd /usr/local/mysql/bin
./mysql -u root -p
查看一下主MySQL的日誌:
CHANGE MASTER TO MASTER_HOST='192.168.159.136',MASTER_USER='repl',MASTER_PASSWORD='123456',MASTER_LOG_FILE='mysql-bin.000001',MASTER_LOG_POS=960;
4、開啓主從
start slave;
5、檢查從服務器狀態,注意是否有報錯
show slave status\G;
已經是連接狀態;
試試同步數據!
關掉防火牆!
同步測試之前。
主數據庫:
從數據庫:
主:
創建數據庫:
從MySQL的同步:
全部代碼:
xz -d mysql-8.0.13-linux-glibc2.12-x86_64.tar.xz
tar -xvf mysql-8.0.13-linux-glibc2.12-x86_64.tar
mv -f mysql-8.0.13-linux-glibc2.12-x86_64 /usr/local/mysql
rpm -qa | grep libaio
useradd -s /sbin/nologin -M mysql
cd /usr/local
ls -al
chown -R mysql:mysql mysql
ls -al
cd mysql/bin/
./mysqld --initialize --user=mysql
(記得記下密碼!)
直接配置 /etc/my.cnf文件。
vim /etc/my.cnf
複製以下內容:
[mysqld]
basedir = /usr/local/mysql
datadir = /var/lib/mysql
socket = /var/lib/mysql/mysql.sock
character-set-server=utf8
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[client]
socket = /var/lib/mysql/mysql.sock
default-character-set=utf8
啓動數據庫:
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
service mysqld start
登錄數據庫:
cd /usr/local/mysql/bin
./mysql -u root -p
root@localhost: O=y#lQf1kAYJ 比如這個密碼,要緊貼着O的左邊進行復制。這樣纔可以!
修改密碼:
ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
#vim /etc/profile
PATH=/usr/local/mysql/bin:$PATH
#export PATH
#vim /etc/ld.so.conf
include /usr/local/mysql/lib/
#ldconfig
接下來就是主從配置啦!
主:
關掉防火牆!
修改my.cnf,添加
[mysqld]
log-bin=mysql-bin
server-id=1
service mysqld restart
systemctl restart mysqld.service
重啓的時候出問題啦,需要安裝一個東西!
我寫的:https://blog.csdn.net/weixin_42859280/article/details/84574205
登錄:
cd /usr/local/mysql/bin
./mysql -u root -p
五條語句:
create user 'repl' identified by '123456';
ALTER USER 'repl'@'%' IDENTIFIED BY '123456';
flush privileges;
GRANT replication slave ON *.* TO 'repl'@'%';
GRANT ALL privileges ON *.* TO 'repl'@'%';
show databases;
use mysql;
show tables;
select host,user from user;
show master status\G;
從:
關掉防火牆!
修改my.cnf,添加
[mysqld]
log-bin=mysql-bin
server-id=2
service mysqld restart
systemctl restart mysqld.service
重啓的時候出問題啦,需要安裝一個東西!
我寫的:
https://blog.csdn.net/weixin_42859280/article/details/84574205
登錄:
cd /usr/local/mysql/bin
./mysql -u root -p
CHANGE MASTER TO MASTER_HOST='192.168.159.136',MASTER_USER='repl',MASTER_PASSWORD='123456',MASTER_LOG_FILE='mysql-bin.000001',MASTER_LOG_POS=1373;
開啓主從
start slave;
show slave status\G;
測試同步:
主:
創建數據庫:
create database www;
use www;
create table info(num int);
show tables;
insert into info values(666);
select * from info;
從:
use www;
show tables;
select * from info;
另外,如果
不是兩個yes的話。
就檢查一下:
- 防火牆關閉了嗎?
- repl這個用戶可以登錄主MySQL嗎?
- server-id=1 server-id=2 這個添加了嗎?
- 看看slave的status信息是否跟主MySQL的master status一樣!
如果都不行的話,就重新做一遍吧!