lvs调度服务器
root@localhost \~\]# ipvsadm -A -t 192.168.1.46:3306 -s rr \[root@localhost \~\]# ipvsadm -a -t 192.168.1.46:3306 -r 192.168.1.21:3306 -m \[root@localhost \~\]# ipvsadm -a -t 192.168.1.46:3306 -r 192.168.1.22:3306 -m MySQL服务器 \[root@localhost \~\]# route del default \[root@localhost \~\]# route add default gw 192.168.1.46 2024/8/14 haproxy负载均衡 \[root@haproxy \~\]# yum -y install ntpdate \[root@haproxy \~\]# ntpdate cn.ntp.org.cn \[root@haproxy \~\]# yum -y install ntp \[root@haproxy \~\]# systemctl start ntpd \[root@haproxy \~\]# systemctl enable ntpd \[root@haproxy \~\]# yum -y install haproxy \[root@haproxy \~\]# vim /etc/haproxy/haproxy.cfg frontend main \*:80 63修改 # use_backend static if url_static 67注释 default_backend web 68修改 backend web balance roundrobin 87添加 server weba 192.168.1.40:80 check server webb 192.168.1.41:80 check \[root@haproxy \~\]# systemctl start haproxy \[root@haproxy \~\]# systemctl enable haproxy \[root@haproxy \~\]# curl 192.168.1.50 web1 \[root@haproxy \~\]# curl 192.168.1.50 web2 \[root@haproxy \~\]# vim /etc/haproxy/haproxy.cfg（配置文件时注释最好删掉） #定义web管理界面 listen statistics 93 bind \*:9090 #定义监听端口 94 mode http #默认使用协议 95 stats enable #启用stats 96 stats uri /hadmin?stats #自定义统计页面的url 97 stats auth admin:admin #统计页面的账号密码 98 stats hide-version #隐藏在统计页面上的haproxy版本信息 100 stats refresh 30s #统计页面自动刷新时间 101 stats admin if TRUE #如果认证通过就做管理 102 stats realm hapadmin #统计页面密码框上提示文件，默认为haproxy\\statistics \[root@haproxy \~\]# systemctl restart haproxy 浏览器访问：http://192.168.1.50:9090/hadmin?stats 加权 \[root@haproxy \~\]# vim /etc/haproxy/haproxy.cfg 87 backend web 88 balance static-rr 89 server weba 192.168.1.40:80 weight 8 check 90 server webb 192.168.1.41:80 weight 2 check systemctl restart haproxy haproxy负载均衡MySQL vim /etc/haproxy/haproxy.cfg 43 mode tcp 63 frontend main \*:3306 67 # use_backend static if url_static 68 default_backend mysql 85 backend mysql 86 balance roundrobin 87 server master 192.168.1.21:3306 check 88 server slave 192.168.1.22:3310 check systemctl restart haproxy 测试 \[root@client bin\]# ./mysql -h192.168.1.34 -P3306 -uzhangmin -pzhangmin mysql\> show variables like 'server_id'; python3 \[root@localhost \~\]# yum -y install python3 \[root@localhost \~\]# pip3 config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple \[root@localhost \~\]# pip3 install pymysql \[root@localhost \~\]# python3 \>\>\> import pymysql 主MySQL： mysql\> SELECT host FROM mysql.user WHERE user = 'zhangmin'; mysql\> GRANT ALL PRIVILEGES ON test.\* TO 'zhangmin'@'%'; mysql\> FLUSH PRIVILEGES; 3.创建两个connenction对象，一个指向mastermysql，一个指向slave msyql \>\>\> master_conn=pymysql.connect(host="192.168.1.21",user="zhangmin",password="zhangmin",database="test",port=3306) \>\>\> slave_conn=pymysql.connect(host="192.168.1.22",user="zhangmin",password="zhangmin",database="test",port=3310) 4. 获取数据游标 master master_cursor=master_conn.cursor() 5. 执行查询 master select_sql="select \* from user"; master_cursor.execute(select_sql); rs=cursor.fetchall() 6. 执行修改 master \>\>\> updatesql="update user set password='000' where username='aaa'" \>\>\> master_cursor.execute(updatesql) 7. 执行删除 master \>\>\> master_conn.commit() \>\>\> delete_sql="delete from user where username='aaa'" \>\>\> master_cursor.execute(delete_aql) master_conn.commit() 8. 执行新增 master insert_sql="insert into user values(1004,'dddddd','ddddddd')" master_cursor.execute(insert_sql); master_conn.commit() 9. 执行查询 slave \>\>\> # 执行查询 获得获得slave 游标 ... \>\>\> slave_cursor=slave_conn.cursor() \>\>\> sql 'select \* from user' \>\>\> slave_cursor.execute(sql) 3 \>\>\> slave_cursor.fetchall() ((2,'bbb','bbbb'), (3,'ccc','cccc'),(1004,'ddddd','ddddddd'))