安裝配置
1、安裝perl的軟件包支持
yum -y install perl perl-devel libaio libaio-devel perl-Time-HiRes perl-DBD-MySQL libev
2、下載proxySQL
https://proxysql.com/
https://github.com/sysown/proxysql/releases
3、 安裝
[root@oldboy data]# rpm -ivh proxysql-2.0.4-1-centos7.x86_64.rpm
[root@oldboy data]# proxysql --version
ProxySQL version 2.0.4-116-g7d371cf, codename Truls
4、 啟動(dòng)
啟動(dòng)ProxySQL
[root@oldboy data]# chkconfig proxysql on
[root@oldboy data]# systemctl start proxysql
[root@oldboy data]# systemctl status proxysql
[root@oldboy data]# netstat -lnp|grep proxysql
tcp 0 0 0.0.0.0:6032 0.0.0.0:* LISTEN 3244/proxysql
tcp 0 0 0.0.0.0:6033 0.0.0.0:* LISTEN 3244/proxysql
5、ProxySQL配置文件概覽
[root@oldboy data]# egrep -v "^#|^$" /etc/proxysql.cnf
datadir="/var/lib/proxysql"
errorlog="/var/lib/proxysql/proxysql.log"
admin_variables=
{
admin_credentials="admin:admin"
mysql_ifaces="0.0.0.0:6032"
}
mysql_variables=
{
threads=4
max_connections=2048
default_query_delay=0
default_query_timeout=36000000
have_compress=true
poll_timeout=2000
interfaces="0.0.0.0:6033"
default_schema="information_schema"
stacksize=1048576
server_version="5.5.30"
connect_timeout_server=3000
monitor_username="monitor"
monitor_password="monitor"
monitor_history=600000
monitor_connect_interval=60000
monitor_ping_interval=10000
monitor_read_only_interval=1500
monitor_read_only_timeout=500
ping_interval_server_msec=120000
ping_timeout_server=500
commands_stats=true
sessions_sort=true
connect_retries_on_failure=10
}
mysql_servers =
(
)
mysql_users:
(
)
mysql_query_rules:
(
)
scheduler=
(
)
mysql_replication_hostgroups=
(
)
ProxySQL軟件結(jié)構(gòu)
proxysql的數(shù)據(jù)目錄
[root@oldboy data]# ll /var/lib/proxysql/
total 312
drwxrwxr-x. 2 proxysql proxysql 6 May 31 15:01 perl5
-rw-rw-r--. 1 proxysql proxysql 1050 May 31 15:01 proxysql-ca.pem
-rw-rw-r--. 1 proxysql proxysql 1058 May 31 15:01 proxysql-cert.pem
-rw-------. 1 proxysql proxysql 163840 May 31 15:01 proxysql.db
-rw-rw-r--. 1 proxysql proxysql 1675 May 31 15:01 proxysql-key.pem
-rw-------. 1 proxysql proxysql 3791 May 31 15:01 proxysql.log
-rw-r--r--. 1 proxysql proxysql 5 May 31 15:01 proxysql.pid
-rw-------. 1 proxysql proxysql 135168 May 31 15:05 proxysql_stats.db
[root@oldboy data]#
ProxySQL內(nèi)置庫介紹
[root@oldboy data]# mysql -uadmin -padmin -h127.0.0.1 -P6032
mysql> show databases;
+-----+---------------+-------------------------------------+
| seq | name | file |
+-----+---------------+-------------------------------------+
| 0 | main | |
| 2 | disk | /var/lib/proxysql/proxysql.db |
| 3 | stats | |
| 4 | monitor | |
| 5 | stats_history | /var/lib/proxysql/proxysql_stats.db |
+-----+---------------+-------------------------------------+
5 rows in set (0.00 sec)
mysql>
main庫：
內(nèi)存配置數(shù)據(jù)庫，表里存放后端db實(shí)例、用戶驗(yàn)證、路由規(guī)則等信息。表名以 runtime_開頭的表示proxysql當(dāng)前運(yùn)行的配置內(nèi)容，不能通過dml語句修改，只能修改對(duì)應(yīng)的不以 runtime_ 開頭的（在內(nèi)存）里的表，然后LOAD使其生效， SAVE使其存到硬盤以供下次重啟加載。
disk庫：
是持久化到硬盤的配置庫，對(duì)應(yīng)/var/lib/proxysql/proxysql.db文件，也就是sqlite的數(shù)據(jù)文件。
stats庫：
是proxysql運(yùn)行抓取的統(tǒng)計(jì)信息庫，包括到后端各命令的執(zhí)行次數(shù)、流量、processlist、查詢種類匯總/執(zhí)行時(shí)間等等。
monitor庫：
存儲(chǔ)monitor模塊收集的信息，主要是對(duì)后端db的健康、延遲檢查。
proxySQL配置應(yīng)用
添加后端節(jié)點(diǎn)
mysql -uadmin -padmin -h127.0.0.1 -P6032
注：配置后端DB 的讀寫分組(hostgroup_id=0為主，hostgroup_id=1為從)
insert into mysql_servers(hostgroup_id,hostname,port,weight,max_connections,max_replication_lag,comment) values (10,'10.0.0.131',3307,1,300,10,'proxysql');
insert into mysql_servers(hostgroup_id,hostname,port,weight,max_connections,max_replication_lag,comment) values (20,'10.0.0.131',3307,1,3000,10,'proxysql');
insert into mysql_servers(hostgroup_id,hostname,port,weight,max_connections,max_replication_lag,comment) values (20,'10.0.0.131',3308,5,3000,10,'proxysql');
insert into mysql_servers(hostgroup_id,hostname,port,weight,max_connections,max_replication_lag,comment) values (20,'10.0.0.131',3309,5,3000,10,'proxysql');
查詢后端節(jié)點(diǎn)：
select * from mysql_servers;
proxySQL 配置相關(guān)層次結(jié)構(gòu)
image.png
配置用戶后端用戶
后端主庫創(chuàng)建用戶：
mysql> grant all on *.* to mon@'10.0.0.%' identified by '123';
mysql> grant all on *.* to app@'10.0.0.%' identified by '123';
proxySQL中添加用戶：
應(yīng)用用戶：
insert into mysql_users(username,password,active,default_hostgroup,transaction_persistent)values
('app','123',1,10,1);
監(jiān)控用戶：
set mysql-monitor_username='mon';
set mysql-monitor_password='123';
配置HG
常用示例：
mysql> insert into mysql_group_replication_hostgroups(writer_hostgroup,backup_writer_hostgroup,reader_hostgroup,offline_hostgroup,active) values(0,2,1,3,1);
配置組策略
insert into mysql_query_rules(rule_id,active,match_digest,destination_hostgroup,apply)values(1,1,'^SELECT.*FOR UPDATE$',0,1);insert into mysql_query_rules(rule_id,active,match_digest,destination_hostgroup,apply)values(2,1,'^SELECT',1,1);
保存配置
load mysql servers to runtime;
load mysql users to runtime;
load mysql variables to runtime;
save mysql servers to disk;
save mysql users to disk;
save mysql variables to disk;load mysql servers to runtime;
測試讀寫分離
