maxscale安装
官网配置文件详解地址：
https://mariadb.com/kb/en/mariadb-enterprise/mariadb-maxscale/maxscale-configuration-usage-scenarios/#authentication

安装包  maxscale-1.4.3-1.centos.6.x86_64.rpm 

# rpm -ivh maxscale-1.4.3-1.centos.6.x86_64.rpm
# mkdir /data/maxscale3306
# cd /data/maxcale3306
# make {cache,data,lang,log}

# cat/etc/maxscale.cnf

[maxscale]
threads=auto       ##开启线程个数，默认为1.设置为auto会同cpu核数相同
# Server definitions     
maxlog=1 #将日志写入到maxscale的日志文件中
log_to_shm=0 #不将日志写入到共享缓存中，开启debug模式时可打开加快速度
log_warning=1 #记录告警信息
log_notice=1 #记录notice
log_info=1 #记录info
log_debug=0 #不打开debug模式

#auth_connect_timeout=60 #默认3秒
#auth_read_timeout=60 #默认1秒
#auth_write_timeout=60 #默认2秒
#localhost_match_wildcard_host=1

logdir=/data/maxscale3306/log/ #日志位置
datadir=/data/maxscale3306/data/ #数据位置
cachedir=/data/maxscale3306/cache/ #缓存位置
piddir=/data/maxscale3306/ #pid文件位置
connection_timeout=300 #连接超时
max_connections=1000 #最大连接数
#language=/data/maxscale3306/lang/
# Set the address of the server to the network
# address of a MySQL server.
#
#[server1],和[server2]是主从，223是主  224是从，可以有多个在加[server3....]

[server1]
type=server
address=192.168.144.223
port=3312
protocol=MySQLBackend
#serversize=10 #权重设置

[server2]
type=server
address=192.168.144.224
port=3310
protocol=MySQLBackend
#serversize=10 #权重设置

# Monitor for the servers
#
# This will keep MaxScale aware of the state of the servers.
# MySQL Monitor documentation:
# https://github.com/mariadb-corporation/MaxScale/blob/master/Documentation/Monitors/MySQL-Monitor.md

[MySQL Monitor]  #监控信息，监控的用户需要对后端数据库有访问replication client的权限   grant replication slave, replication client on *.* to scalemon@'%' identified by '123456';
type=monitor
module=mysqlmon
servers=server1,server2
user=scalemon
passwd=B7A14BD5A08414AF147BD35CE0F761FC #加密的123456，后面有加密的方法，也可不加密
monitor_interval=10000 #监控心跳为1秒
detect_stale_master=true #slave节点全部断掉时，将所有的读写都指向master节点
#max_slave_replication_lag=5 #超过延迟5秒，把请求转发给其他slave，这里就两个节点就没开

# Service definitions
#
# Service Definition for a read-only service and
# a read/write splitting service.
#

# ReadConnRoute documentation:
# https://github.com/mariadb-corporation/MaxScale/blob/master/Documentation/Routers/ReadConnRoute.md

#Read-Only的选项全都注释掉了
#[Read-Only Service]
#type=service
#router=readconnroute
#servers=server1,server2
#user=maxscale
#passwd=123456
#router_options=slave
#filters=Hint

#[Hint]
#type=filter
#module=hintfilter

# ReadWriteSplit documentation:
# https://github.com/mariadb-corporation/MaxScale/blob/master/Documentation/Routers/ReadWriteSplit.md

#读写分离，用户需要有SELECT ON mysql.db；SELECT ON mysql.tables_priv；SHOW DATABASES ON *.*的权限    grant select,show databases on mysql.* to maxscale@'%' identified by '123456';
[Read-Write Service]
type=service
router=readwritesplit
servers=server2,server1
router_options=master_accept_reads=false,master_failure_mode=fail_on_write
user=maxscale
passwd=B7A14BD5A08414AF147BD35CE0F761FC     #123456的加密后的
max_slave_connections=100% #所有的slave提供select查询服务
use_sql_variables_in=all ###动态参数可以走全部的数据库  [all|master]  如果设置为master的话前台看到的中文是乱码，一般建议设置为all
#weightby=serversize #权重设置
#enable_root_user=1 #允许root用户登录执行
auth_all_servers=true #
log_auth_warnings=true #身份验证失败和警告的日志记录，记录那些试图连接到MaxScale和来自哪里

filters=Hint #强制select走master的选项，参考：https://mariadb.com/kb/en/mariadb-enterprise/mariadb-maxscale/maxscale-hint-syntax/      不知道为什么不好用，强制了也不走master

[Hint]
type=filter
module=hintfilter
# This service enables the use of the MaxAdmin interface
# MaxScale administration guide:
# https://github.com/mariadb-corporation/MaxScale/blob/master/Documentation/Reference/MaxAdmin.md

[MaxAdmin Service]
type=service
router=cli

# Listener definitions for the services
#
# These listeners represent the ports the
# services will listen on.
#

#Read-Only的全部注释掉了，上面说过了
#[Read-Only Listener]
#type=listener
#service=Read-Only Service
#protocol=MySQLClient
#port=4008

[Read-Write Listener]
type=listener
service=Read-Write Service
protocol=MySQLClient
port=4006 #连接端口，程序连接端口

[MaxAdmin Listener]
type=listener
service=MaxAdmin Service
protocol=maxscaled
port=6603 #管理端口

加密：
# maxkeys /data/maxscale3306/data/.secrets       ---创建加密文件
# maxpasswd /data/maxscale3306/data/.secrets  123456     ---生成加密后的密码
B7A14BD5A08414AF147BD35CE0F761FC     这就是配置文件中的password
注：创建加密文件的.secrets文件要在datadir定义的目录中

启动：
# /etc/init.d/maxscale  start|stop|restart
或者  maxscale -f /etc/maxscale.cnf 

# netstat -ntelp | grep max*    

测试：
测试就不演示了

管理：
默认密码：mariadb
# maxadmin list servers -pmariadb           查看当前服务器状态
Servers.
-------------------+-----------------+-------+-------------+--------------------
Server             | Address         | Port  | Connections | Status              
-------------------+-----------------+-------+-------------+--------------------
server1            | 192.168.144.223 |  3312 |           0 | Master, Running
server2            | 192.168.144.224 |  3310 |           0 | Slave, Running
-------------------+-----------------+-------+-------------+--------------------

# maxadmin list services -pmariadb    查看当前服务连接
Services.
--------------------------+----------------------+--------+---------------
Service Name              | Router Module        | #Users | Total Sessions
--------------------------+----------------------+--------+---------------
Read-Write Service        | readwritesplit       |      1 |   788
MaxAdmin Service          | cli                  |      2 |     5
--------------------------+----------------------+--------+---------------


# maxadmin list listeners -pmariadb      查看当前运行端口
Listeners.
---------------------+--------------------+-----------------+-------+--------
Service Name         | Protocol Module    | Address         | Port  | State
---------------------+--------------------+-----------------+-------+--------
Read-Write Service   | MySQLClient        | *               |  4006 | Running
MaxAdmin Service     | maxscaled          | *               |  6603 | Running
---------------------+--------------------+-----------------+-------+--------
如果想改管理密码要在配置文件里加上
[MaxAdmin]
type=service
router=cli
user=maxscale
passwd=Mhu87p2D

新闻标题：maxscale读写分离
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