1、Atlas實(shí)現(xiàn)讀寫分離
1.1 Atlas介紹
摘自oldguo
Atlas是由 Qihoo 360, Web平臺(tái)部基礎(chǔ)架構(gòu)團(tuán)隊(duì)開發(fā)維護(hù)的一個(gè)基于MySQL協(xié)議的數(shù)據(jù)中間層項(xiàng)目。
它是在mysql-proxy 0.8.2版本的基礎(chǔ)上，對(duì)其進(jìn)行了優(yōu)化，增加了一些新的功能特性。
360內(nèi)部使用Atlas運(yùn)行的mysql業(yè)務(wù)，每天承載的讀寫請(qǐng)求數(shù)達(dá)幾十億條。
下載地址
https://github.com/Qihoo360/Atlas/releases
注意：
1、Atlas只能安裝運(yùn)行在64位的系統(tǒng)上
2、Centos 5.X安裝 Atlas-XX.el5.x86_64.rpm，Centos 6.X安裝Atlas-XX.el6.x86_64.rpm。
3、后端mysql版本應(yīng)大于5.1，建議使用Mysql 5.6以上
1.1 安裝ATLAS
[root@db03 ~]# rpm -ivh Atlas-2.2.1.el6.x86_64.rpm
1.2 配置
cd /usr/local/mysql-proxy/conf
mv test.cnf test.cnf.bak
cat > test.cnf <<EOF
[mysql-proxy]
admin-username = user
admin-password = pwd
proxy-backend-addresses = 10.0.0.55:3306
proxy-read-only-backend-addresses = 10.0.0.52:3306,10.0.0.53:3306
pwds = repl:3yb5jEku5h4=,mha:O2jBXONX098=
daemon = true
keepalive = true
event-threads = 8
log-level = message
log-path = /usr/local/mysql-proxy/log
sql-log=ON
proxy-address = 0.0.0.0:33060
admin-address = 0.0.0.0:2345
charset=utf8
EOF
1.3 啟動(dòng)atlas
/usr/local/mysql-proxy/bin/mysql-proxyd test start
ps -ef |grep proxy
1.4 測(cè)試讀寫分離
[root@db03 ~]# mysql -umha -pmha -h 10.0.0.53 -P 33060
讀:
db03 [(none)]>select @@server_id;
寫:
db03 [(none)]>begin;select @@server_id; commit;
1.5 生產(chǎn)授權(quán)用戶
例子: 創(chuàng)建用戶app，密碼123
（1）業(yè)務(wù)主庫中
db01 [(none)]>grant all on *.* to root@'10.0.0.%' identified by '123';
（2）將密碼加密處理
cd /usr/local/mysql-proxy/bin
[root@m01 /usr/local/mysql-proxy/bin]# ./encrypt 123
3yb5jEku5h4=
（3）修改配置文件
vim /usr/local/mysql-proxy/conf/test.cnf
pwds = repl:3yb5jEku5h4=,mha:O2jBXONX098=,root:3yb5jEku5h4=
（4）重啟atlas
/usr/local/mysql-proxy/bin/mysql-proxyd test restart
（5）用戶測(cè)試
[root@db03 ~]# mysql -uroot -p123 -h 10.0.0.61 -P 33060
1.6 atlas基礎(chǔ)管理
[root@db03 ~]# mysql -uuser -ppwd -h 10.0.0.61 -P 2345
[root@db03 ~]# mysql -uuser -ppwd -h 10.0.0.53 -P 2345
db03 [(none)]>select * from help;
1.6.1 打印幫助
db03 [(none)]> SELECT * FROM help;
1.6.2 查看節(jié)點(diǎn)信息
db03 [(none)]> SELECT * FROM backends ;
1.6.3 上線和下線節(jié)點(diǎn)
db03 [(none)]> SET OFFLINE $backend_id;
db03 [(none)]> SET ONLINE $backend_id;
1.6.4 刪除和添加節(jié)點(diǎn)
db03 [(none)]> REMOVE BACKEND 3;
db03 [(none)]> ADD SLAVE 10.0.0.53:3306;
1.6.5 添加用戶和刪除用戶
db03 [(none)]> SELECT * FROM pwds;
db03 [(none)]> REMOVE PWD root;
db03 [(none)]> ADD PWD root:123
db03 [(none)]> ADD ENPWD root:3yb5jEku5h4=
1.6.6 持久化配置
db03 [(none)]> SAVE CONFIG
