haproxy+mycat+mysql 架构方案讲义

发布时间：2020-04-23 14:55:48 作者：三月
来源：三月阅读：376

本文主要给大家介绍haproxy+mycat+mysql 架构方案讲义，希望可以给大家补充和更新些知识，如有其它问题需要了解的可以持续在亿速云行业资讯里面关注我的更新文章的。

描述：

架构方案：

mysql （master/slave） --gtid 方式主备（pos 也可）

mycat （master/slave） --xinted 插件时间主备模式

haproxy（master/slave) --keepalived 自动切换

haproxy+mycat+mysql 架构方案讲义

--keepalived和haproxy必须装在同一台机器上, keepalived负责为该云服务器抢占vip（虚拟ip），抢占到vip后，对该主机的访问可以通过原来的ip（10.118.242.214）访问，也可以直接通过vip（10.118.242..212）访问。

--10.118.242.214上的keepalived也会去抢占vip，抢占vip时有优先级，配置keepalived.conf中的（priority 150 #数值愈大，优先级越高,10.118.242.216上改为120，master和slave上该值配置不同）决定。但是一般哪台主机上的keepalived服务先启动就会抢占到vip，即使是slave，只要先启动也能抢到。

--haproxy负责将对vip的请求分发到mycat上。起到负载均衡的作用，同时haproxy也能检测到mycat是否存活，haproxy只会将请求转发到存活的mycat上。

--如果一台云服务器（keepalived+haproxy服务器）宕机，另外一台上的keepalived会立刻抢占vip并接管服务。

--如果一台mycat服务器宕机，haporxy转发时不会转发到宕机的mycat上，所以mycat依然可用.

MyCAT 后面，连接的是MYSQL 数据库，这里为： A/B复制模式。

Haproxy + keepalived 安装在同一主机上。

mycat+xinted 安装在同一主机上。

版本： OS : redhat6.4 x86 64bit

Mysql : 5.7.15

Mycat :server-1.5.1-RELEASE

Haproxy : haproxy-1.6.2.tar.gz

keepalived : keepalived-1.2.16.tar.gz

安装之前，最好把iptables ，selinux 关闭

一：配置本地yum 源，并安装相应的依赖包（这里我直接套用安装oracle依赖性包加载，一般oracle使用包，其他的软件都会包含。）

二：安装MYSQL 数据

(5.7 版本之前，可以使用系统root 启用，5.7之后，被限制了，也更加考虑到了其安全性）

注意： 1，mysql 开始安装时，mysql_install_db由5.6之前的在scripts 转移至 bin 目录下。

2，初次进入 mysql 库需要输入初始密码，路径在 /home/mysql/下：

[mysql@martinli02 mysql-5.7.10]$ cat /home/mysql/.mysql_secret

# Password set for user 'root@localhost' at 2015-12-27 23:17:57

.hyMlk?!b6M!

3，登陆后，必须要修改密码 mysql> set password=password('xxxxx');

mysql> flush privileges;

三： MYSQL master/slave 配置

---参考 MYSQL 同步复制

----设置参数，自动提交 autocommit = 1 (否然，mycat 插入时，没数据显示)

四： Mycat 安装配置

--这里，mycat 我主要用其实现读写分离，未做分库分表设置，所以，

只涉及 schema.xml, server.xml 文件的修改。

--Mysql 主节点使用 innodb 引擎，备节点使用myisam 引擎。

# useradd -m -u 1201 -g mysql mycat

# tar -xvf Mycat-server-1.5.1-RELEASE-20160816173057-linux.tar.gz -C /usr/local/

# cd /usr/local/mycat

[root@mysql01 mycat]# ls

bin catlet conf lib logs version.txt --解压出来后，就前5个目录

[root@mysql01 mycat]# cd conf/

[root@mysql01 conf]# ls

autopartition-long.txtlog4j.xml rule.xmlserver.xml

cacheservice.properties myid.properties schema.xml wrapper.conf

dnindex.properties partition-hash-int.txt sequence_conf.properties zk-create.yaml

ehcache.xmlpartition-range-mod.txt sequence_db_conf.properties

index_to_charset.propertiesrouter.xml sequence_time_conf.properties

--配置schema.xml 参数--

[root@mysql01 conf]# cat schema.xml

<?xml version="1.0"?>

<!DOCTYPE mycat:schema SYSTEM "schema.dtd">

<mycat:schema xmlns:mycat="http://org.opencloudb/" >

</schema>

</schema>

</schema>

</schema>

<heartbeat>select user()</heartbeat>

</readHost>

</writeHost>

</dataHost>

</mycat:schema>

-- server.xml 配置参数 --

[root@mysql01 conf]# cat server.xml

<?xml version="1.0" encoding="UTF-8"?>

<!-- - - Licensed under the Apache License, Version 2.0 (the "License");

- you may not use this file except in compliance with the License. - You

may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0

- - Unless required by applicable law or agreed to in writing, software -

distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT

WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. -->

<!DOCTYPE mycat:server SYSTEM "server.dtd">

<mycat:server xmlns:mycat="http://org.opencloudb/">

<property name="defaultSqlParser">druidparser</property>

</system>

<property name="password">mysql123</property>

<property name="schemas">mongodb,redis,test,scout</property>

</user>

<property name="password">query123</property>

<property name="schemas">mongodb,redis,test,scout</property>

</user>

</mycat:server>

--这里，最新版本可以支持密文，无需明文，这里为了方便。

五，配置xinetd 服务及参数：

在mycat 1,mycat2 上都需添加检测端口48700的脚本，为此需要用到xinetd, xinetd 为linux 系统基础服务，主要用来监听MYCAT 是否存活。

yum install xinted*

在： /etc/xinted.d/ 及 /usr/local/bin/xinted 下查看配置文件：

--第一种安装方式：

我这里通过第二种方式安装：

tar -xvf xinetd-2.3.15.tar.gz -C /usr/local/

[root@mysql01 ~]# cd /usr/local/xinetd-2.3.15/

[root@mysql01 xinetd-2.3.15]# ls

aclocal.m4 config.guess config.log configure COPYRIGHT libs README xinetd.spec AUDIT config.h config.status configure.in INSTALL Makefile TODO xinetd.spec.in CHANGELOG config.h.in config.sub contrib install-sh Makefile.in xinetd

[root@mysql01 xinetd-2.3.15]# cd contrib/

[root@mysql01 contrib]# ls

empty.conf mycat_monitor.sh xinetd xinetd.conf xinetd.d

[root@mysql01 contrib]# tail -12 xinetd.conf

groups = yes

umask = 002

# Generally, banners are not used. This sets up their global defaults

# banner =

# banner_fail =

# banner_success =

}

includedir /usr/local/xinetd-2.3.15/contrib/xinetd.d --主要修改这里

-- /usr/local/xinetd-2.3.15/contrib/xinetd.d/mycat_status --服务参数路径

mycat_status此配置主要是用来监听mycat是否存活的配置

[root@mysql01 contrib]# cat xinetd.d/mycat_status

service mycat_status

{

flags = REUSE

socket_type = stream

port = 48700

wait = no

user = root

server =/usr/local/xinetd-2.3.15/contrib/mycat_monitor.sh

log_on_failure += USERID

disable = no

}

[root@mycat01 xinetd.d]# pwd

/usr/local/xinetd-2.3.15/contrib/xinetd.d

[root@mycat01 xinetd.d]# cd ../

[root@mycat01 contrib]# ls

empty.conf mycat_monitor.sh xinetd xinetd.conf xinetd.d

--mycat_monitor.sh 此配置主要是用来监听mycat是否存活的脚本

[root@mysql01 contrib]# cat mycat_monitor.sh

#!/bin/bash

#/usr/local/bin/mycat_status.sh

# This script checks if a mycat server is healthy running on localhost. It will

# return:

# "HTTP/1.x 200 OK\r" (if mycat is running smoothly)

# "HTTP/1.x 503 Internal Server Error\r" (else)

mycat=`/usr/local/mycat/bin/mycat status |grep 'not running'| wc -l`

if [ "$mycat" = "0" ];

then

/bin/echo -e "HTTP/1.1 200 OK\r\n"

else

/bin/echo -e "HTTP/1.1 503 Service Unavailable\r\n"

4、/etc/services中加入mycat_status服务 --添加进入后，启动才有效。

加入mycat_status服务，

cd /etc

vi services

在末尾加入以下内容：

mycat_status 48700/tcp # mycat_status

保存

重启xinetd服务

service xinetd restart

############

[root@mycat01 xinetd]# pwd

/usr/local/xinetd-2.3.15/xinetd

--xinetd 启动，停止脚本

--启动脚本：

#!/bin/bash

/usr/local/xinetd-2.3.15/xinetd/xinetd -f /usr/local/xinetd-2.3.15/contrib/xinetd.d/mycat_status &

--停止脚本：

#!/bin/bash

ps -ef |grep xinetd |grep -v grep |awk '{print $2}'|xargs kill -s 9

---------------

启动mysql启动xinted ，启动mycat

----------------

六，安装keepalived

--openssl 安装：

openssl 必须先于 keepalive 先安装，否则安装keepalive时有可能报错，keepalived 依赖openssl.

yum install gcc* cc*

安装openssl-devel

yum install openssl-devel -y #如无法yum下载安装，请修改yum配置文件

--通过rpm 包安装：

mkdir -pv /usr/local/openssl/

tar -xvf xxxxx.gz -C /usr/local/

cd /usr/local/openssl-1.0.1l/

./config --prefix=/usr/local/openssl/

make

make test

make install

ln -s /usr/local/openssl /usr/local/ssl

----openssl配置----

vi /etc/ld.so.conf

在/etc/ld.so.conf文件的最后面，添加如下内容：

/usr/local/openssl/lib

vi /etc/profile

内容如下：

export OPENSSL=/usr/local/openssl/bin

export PATH=$PATH:$OPENSSL

执行以下语句是环境变量生效：

source /etc/profile

测试:

cd /usr/local/openssl/

[root@host-10-118-220-136 openssl]# ls

bin include lib ssl

[root@host-10-118-220-136 openssl]# cd bin/

[root@host-10-118-220-136 bin]# ls

c_rehash openssl

[root@host-10-118-220-136 bin]# ldd openssl

linux-vdso.so.1 => (0x00007fff0ba32000)

libdl.so.2 => /lib64/libdl.so.2 (0x0000003883200000)

libc.so.6 => /lib64/libc.so.6 (0x0000003882e00000)

/lib64/ld-linux-x86-64.so.2 (0x0000003882a00000)

[root@host-10-118-220-136 bin]# pwd

/usr/local/openssl/bin

[root@host-10-118-220-136 bin]# which openssl

/usr/bin/openssl

[root@host-10-118-220-136 bin]# openssl version

OpenSSL 1.0.1l 15 Jan 2015

[root@host-10-118-220-136 bin]#

----在这里，只要keepalive 编辑安装时不抱错，就可以了。不管openssl 是否真成功。

--keepalived安装：

tar -xvf keepalived-1.2.16.tar.gz -C /usr/local/

cd /usr/local/keepalived-1.2.16/

./configure

make && make install

如果 keepalived 安装报错:

安装keepalive错误：configure: error: No SO_MARK

下面加个参数，禁用fwmark

[root@gw keepalived-1.2.16]# ./configure --disable-fwmark

[root@host-10-118-220-136 etc]# cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/

[root@host-10-118-220-136 etc]# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/

[root@host-10-118-220-136 etc]# cp /usr/local/keepalived-1.2.16/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

[root@host-10-118-220-136 etc]# cp /usr/local/sbin/keepalived /usr/sbin/

--keepalived 配置参数：

[root@mysql03 keepalived]# pwd

/usr/local/keepalived-1.2.16/keepalived/etc/keepalived

[root@mysql03 keepalived]# cat keepalived.conf --主配置

! Configuration File for keepalived

vrrp_script chk_http_port

{

script "/etc/keepalived/scripts/check_haproxy.sh"

interval 2

weight 2

}

vrrp_instance VI_1

{

state MASTER （主为MASTER 备为BACKUP）

interface eth0

virtual_router_id 51

priority 150

advert_int 1

authentication {

auth_type PASS

auth_pass 1234

}

track_script {

chk_http_port

}

virtual_ipaddress

{

10.118.242.212 dev eth0 scope global -- 虚拟

10.118.242.211 dev eth0 scope global

}

notify_master /etc/keepalived/scripts/haproxy_master.sh

notify_backup /etc/keepalived/scripts/haproxy_backup.sh

notify_fault /etc/keepalived/scripts/haproxy_fault.sh

notify_stop /etc/keepalived/scripts/haproxy_stop.sh

}

[root@mysql03 keepalived]# cat keepalived.conf --备配置

! Configuration File for keepalived

vrrp_script chk_http_port

{

script "/etc/keepalived/scripts/check_haproxy.sh"

interval 2

weight 2

}

vrrp_instance VI_1

{

state BACKUP （主为MASTER 备为BACKUP）

interface eth0 --#对外提供服务的网络接口

virtual_router_id51 --#VRRP组名，两个节点的设置必须一样，以指明各个节点属于同一VRRP组

priority 120

advert_int 1

authentication {

auth_type PASS

auth_pass 1234

}

track_script {

chk_http_port --#调用脚本check_haproxy.sh检查haproxy是否存活

}

virtual_ipaddress

{

10.118.242.212 dev eth0 scope global --这ip必须与我们在lvs客户端设定的vip相一致

10.118.242.211 dev eth0 scope global

}

notify_master /etc/keepalived/scripts/haproxy_master.sh

notify_backup /etc/keepalived/scripts/haproxy_backup.sh

notify_fault /etc/keepalived/scripts/haproxy_fault.sh

notify_stop /etc/keepalived/scripts/haproxy_stop.sh

}

-----------------------------------

1. virtual_router_id 51 这个代表一个集群组，如果同一个网段还有另一组集群，请使用不同的组编号区分。如换成52、53等。

2. interface eth3 和172.17.210.103 dev eth3 scope global中的eth3指的是网卡，如果是多网卡，可能会有eth0，eth3，eth4…，可以使用ifconfig命令查看，确保eth0是本机存在的网卡地址。有些服务器如果只有一个网卡，但被人为把eth0改成eth3了，你再写eth0就找不到了的。

-----------------------------------

[root@mysql03 scripts]# cat check_haproxy.sh

#!/bin/bash

STARTHAPROXY="/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg"

STOPKEEPALIVED="/etc/init.d/keepalived stop"

LOGFILE="/usr/local/keepalived/var/log/keepalived-haproxy-state.log"

echo "[check_haproxy status]" >> $LOGFILE

A=`ps-C haproxy --no-header |wc-l`

echo "[check_haproxy status]" >> $LOGFILE

date >> $LOGFILE

if [ $A -eq 0 ];then

echo $STARTHAPROXY >> $LOGFILE

$STARTHAPROXY >> $LOGFILE 2>&1

sleep5

if [ `ps -C haproxy --no-header |wc-l` -eq0 ];then

exit 0

else

exit 1

-----------------------

粗体check_haproxy.sh

vi /etc/keepalived/scripts/check_haproxy.sh

脚本含义：如果没有haproxy进程存在，就启动haproxy，停止keepalived

check_haproxy.sh

[root@mysql03 scripts]# cat haproxy_master.sh (主备一样）

#!/bin/bash

STARTHAPROXY=`/usr/local/haproxy/sbin/haproxy-f/usr/local/haproxy/haproxy.cfg`

STOPHAPROXY=`ps-ef |grep sbin/haproxy| grep -vgrep|awk'{print $2}'|xargskill-s 9`

LOGFILE="/usr/local/keepalived/var/log/keepalived-haproxy-state.log"

echo "[master]" >> $LOGFILE

date >> $LOGFILE

echo "Being master...." >> $LOGFILE 2>&1

echo "stop haproxy...." >> $LOGFILE 2>&1

$STOPHAPROXY >> $LOGFILE 2>&1

echo "start haproxy...." >> $LOGFILE 2>&1

$STARTHAPROXY >> $LOGFILE 2>&1

echo "haproxy stared ..." >> $LOGFILE

[root@mysql03 scripts]# cat haproxy_fault.sh (主备一样）

#!/bin/bash

LOGFILE=/usr/local/keepalived/var/log/keepalived-haproxy-state.log

echo "[fault]" >> $LOGFILE

date >> $LOGFILE

[root@mysql03 scripts]# cat haproxy_stop.sh (主备一样）

#!/bin/bash

LOGFILE=/usr/local/keepalived/var/log/keepalived-haproxy-state.log

echo "[stop]" >> $LOGFILE

date >> $LOGFILE

--启动keepalived:

[root@mysql03 keepalived-1.2.16]# /etc/init.d/keepalived restart

Stopping keepalived: [FAILED]

Starting keepalived: [ OK ]

-- 测试验证

[root@mysql03 scripts]# ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UNKNOWN qlen 1000

link/ether 00:50:56:aa:54:86 brd ff:ff:ff:ff:ff:ff

inet 10.118.242.214/24 brd 10.118.242.255 scope global eth0

inet 10.118.242.212/32 scope global eth0

inet6 fe80::250:56ff:feaa:5486/64 scope link

valid_lft forever preferred_lft forever

七： haproxy 安装配置

# tar xf haproxy-1.4.25.tar.gz -C /usr/local/

# cd haproxy-1.4.25

# --查看版本号（os-kener）

# make TARGET=linux26 PREFIX=/usr/local/haproxy install

注：TARGET后面根据本机操作系统内核版本来填写

创建配置文件目录，日志目录，并根据需求编写配置文件

# mkdir /usr/local/haproxy/{conf,logs}

# vim /usr/local/haproxy/conf/haproxy.cfg

配置参数，主备一样：

[root@mysql03 conf]# cat haproxy.cfg

global

log 127.0.0.1 local0

maxconn 4096

chroot /usr/local/haproxy

user mysql

group mysql

daemon

quiet

nbproc 1

pidfile /usr/local/haproxy/logs/haproxy.pid

defaults

log global

option dontlognull

retries 3

option httplog

option redispatch

maxconn 3000

contimeout 50000

clitimeout 50000

srvtimeout 50000

listen admin_stats

bind 10.118.242.212:48800

stats uri /admin-status

stats auth admin:admin

mode http

option httplog

listen allmycat_service

bind 10.118.242.212:8096

mode tcp

option tcplog

option httpchk OPTION * HTTP/1.1\r\nHost:\ www

balance roundrobin

server mycat_209 10.118.242.209:8066 check port 48700 inter 5s rise 2 fall 3

server mycat_210 10.118.242.210:8066 check port 48700 inter 5s rise 2 fall 3

srvtimeout 20000

listen allmycat_admin

bind 10.118.242.212:8097

mode tcp

option tcplog

option httpchk OPTIONS * HTTP/1.1\r\nHost:\ www

balance roundrobin

server mycat_209 10.118.242.209:9066 check port 48700 inter 5s rise 2 fall 3

server mycat_210 10.118.242.210:9066 check port 48700 inter 5s rise 2 fall 3

srvtimeout 20000

---------------------------

bind 10.118.242.212:8096 对应的是mycat 8066 端口，

bind 10.118.242.212:8097 对应的是mycat 9066 端口。（需要和mycat 一致）

server 为 mycat 两台主机

----------------------------

配置haproxy 日志记录方式：

yum install rsyslog -y

--默认haproxy 是不记录日志的，为了记录日志还需要配置syslog 模块，在Linux下rsyslogd服务

--先安装rsyslog

cd /etc/rsyslog.d/ --如果没有此目录，需新创建。

[root@mysql03 conf]# cd /etc/rsyslog.d/

[root@mysql03 rsyslog.d]# ls

haproxy.conf

[root@mysql03 rsyslog.d]# cat haproxy.conf --添加内容

$ModLoad imudp

$UDPServerRun 514

local0.* /var/log/haproxy.log

[root@mysql03 rsyslog.d]# pwd

/etc/rsyslog.d --添加

在#### RULES ####上面一行的地方加入以下内容：

# Include all config files in /etc/rsyslog.d/

$IncludeConfig /etc/rsyslog.d/*.conf

#### RULES ####

在local7.* /var/log/boot.log的下面加入以下内容（增加后的效果如下）：

local0.* /var/log/haproxy.log

启动rsyslog 服务

--立马在/var/log/有 harporxy.log 了。

[root@mysql03 rsyslog.d]# cd /var/log/

[root@mysql03 log]# ll haproxy.log

-rw-------. 1 root root 5160 Nov 15 16:49 haproxy.log

启动 haproxy：

# /usr/local/haproxy/sbin/haproxy -c /usr/local/haproxy/conf/haproxy.cfg

---------

[root@mysql03 log]# netstat -nltp

Active Internet connections (only servers)

Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name

tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1381/rpcbind

tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1676/sshd

tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 1545/cupsd

tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1752/master

tcp 0 0 127.0.0.1:6010 0.0.0.0:* LISTEN 6278/sshd

tcp 0 0 127.0.0.1:6011 0.0.0.0:* LISTEN 6387/sshd

tcp 0 0 127.0.0.1:6012 0.0.0.0:* LISTEN 24216/sshd

tcp 0 0 10.118.242.212:8096 0.0.0.0:* LISTEN 16997/haproxy

tcp 0 0 10.118.242.212:48800 0.0.0.0:* LISTEN 16997/haproxy

tcp 0 0 10.118.242.212:8097 0.0.0.0:* LISTEN 16997/haproxy

tcp 0 0 0.0.0.0:56457 0.0.0.0:* LISTEN 1399/rpc.statd

通过本地MYSQL 工具调试：

MYSQL IP + 端口可以连接

MYCAT IP + 端口也可以连接

HAPORXY(VIP) + 端口也可以连接

通过 url 地址可以看见 haproxy 调度界面： http://10.118.242.212:48800

账号密码 admin/admin

haproxy+mycat+mysql 架构方案讲义

-------- THE END -------

-----报错处理：

[root@mysql01 sbin]# /usr/local/haproxy-1.6.2/sbin/haproxy -f /usr/local/haproxy-1.6.2/conf/haproxy.cfg &

[1] 6783

[root@mysql01 sbin]# [ALERT] 293/121421 (6783) : parsing [/usr/local/haproxy-1.6.2/conf/haproxy.cfg:21] : 'listen' cannot handle unexpected argument '10.118.242.211:48800'.

[ALERT] 293/121421 (6783) : parsing [/usr/local/haproxy-1.6.2/conf/haproxy.cfg:21] : please use the 'bind' keyword for listening addresses.

[ALERT] 293/121421 (6783) : parsing [/usr/local/haproxy-1.6.2/conf/haproxy.cfg:26] : 'listen' cannot handle unexpected argument '10.118.242.211:8098'.

[ALERT] 293/121421 (6783) : parsing [/usr/local/haproxy-1.6.2/conf/haproxy.cfg:26] : please use the 'bind' keyword for listening addresses.

[ALERT] 293/121421 (6783) : Error(s) found in configuration file : /usr/local/haproxy-1.6.2/conf/haproxy.cfg

[ALERT] 293/121421 (6783) : Fatal errors found in configuration.

--这里的：[/usr/local/haproxy-1.6.2/conf/haproxy.cfg:21] : 'listen' cannot handle unexpected argument '10.118.242.211:48800'.

是因为写法错误：

--------------------

[root@mysql02 sbin]# /usr/local/haproxy-1.6.2/sbin/haproxy -f /usr/local/haproxy-1.6.2/conf/haproxy.cfg

[ALERT] 293/151834 (20139) : Starting proxy admin_stats: cannot bind socket [10.118.242.211:48800]

[ALERT] 293/151834 (20139) : Starting proxy allmycat_service: cannot bind socket [10.118.242.211:8098]

--这里报错需要修改/etc/sysctl.conf 参数

[ALERT] 164/110030 (11606) : Starting proxy linuxyw.com: cannot bind socket

这个问题，其实就是因为你的haproxy没有得到VIP的原因，而你的配置文件又绑定了VIP地址，所以会提示以上错误当然，你也要确保你的haproxy服务器做了hearbeat或keepalived，绑定VIP，要不就无法高可用了。

解决方法：

修改内核参数： /etc/sysctl.conf

net.ipv4.ip_nonlocal_bind=1

保存结果，使结果生效

sysctl –p

或者使用echo进去，前提是sysctl.conf文件中没有本条参数：

echo 'net.ipv4.ip_nonlocal_bind = 1'>>/etc/sysctl.conf

net.ipv4.ip_nonlocal_bind=1 意思是启动haproxy的时候，允许忽视VIP的存在

传到各个机器

for i in IP1 IP2 IP3 IP4

do scp /etc/hosts $i:/etc;

done

--------MYSQL MY.CNF 配置参数------

[client]

user=martin

password=88888888

[mysqld]

########basic settings########

server-id= 11

port = 3308

user = mysql

bind_address = 10.118.242.209

autocommit = 1

character_set_server=utf8mb4

skip_name_resolve = 1

max_connections = 800

max_connect_errors = 1000

datadir = /data/mysql_data

transaction_isolation =READ-COMMITTED

explicit_defaults_for_timestamp = 1

join_buffer_size = 134217728

tmp_table_size = 67108864

tmpdir = /tmp

max_allowed_packet = 16777216

sql_mode ="STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER"

interactive_timeout = 1800

wait_timeout = 1800

read_buffer_size = 16777216

read_rnd_buffer_size = 33554432

sort_buffer_size = 33554432

########log settings########

log_error = error.log

slow_query_log = 1

slow_query_log_file = slow.log

log_queries_not_using_indexes = 1

log_slow_admin_statements = 1

log_slow_slave_statements = 1

log_throttle_queries_not_using_indexes = 10

expire_logs_days = 90

long_query_time = 2

min_examined_row_limit = 100

########replication settings########

master_info_repository = TABLE

relay_log_info_repository = TABLE

log_bin = bin.log

sync_binlog = 1

gtid_mode = on

enforce_gtid_consistency = 1

log_slave_updates

binlog_format = row

relay_log = relay.log

relay_log_recovery = 1

binlog_gtid_simple_recovery = 1

slave_skip_errors = ddl_exist_errors

########innodb settings########

innodb_page_size = 8192

innodb_buffer_pool_size = 6G

innodb_buffer_pool_instances = 8

innodb_buffer_pool_load_at_startup = 1

innodb_buffer_pool_dump_at_shutdown = 1

innodb_lru_scan_depth = 2000

innodb_lock_wait_timeout = 5

innodb_io_capacity = 4000

innodb_io_capacity_max = 8000

innodb_flush_method = O_DIRECT

innodb_file_format = Barracuda

innodb_file_format_max = Barracuda

innodb_log_group_home_dir = /redolog/

innodb_undo_directory = /undolog/

innodb_undo_logs = 128

innodb_undo_tablespaces = 3

innodb_flush_neighbors = 1

innodb_log_file_size = 4G

innodb_log_buffer_size = 16777216

innodb_purge_threads = 4

innodb_large_prefix = 1

innodb_thread_concurrency = 64

innodb_print_all_deadlocks = 1

innodb_strict_mode = 1

innodb_sort_buffer_size = 67108864

########semi sync replication settings########

plugin_dir=/usr/local/mysql/lib/plugin

plugin_load = "rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"

loose_rpl_semi_sync_master_enabled = 1

loose_rpl_semi_sync_slave_enabled = 1

loose_rpl_semi_sync_master_timeout = 5000

[mysqld-5.7]

innodb_buffer_pool_dump_pct = 40

innodb_page_cleaners = 4

innodb_undo_log_truncate = 1

innodb_max_undo_log_size = 2G

innodb_purge_rseg_truncate_frequency = 128

log_timestamps=system

transaction_write_set_extraction=MURMUR32

show_compatibility_56=on

看了以上关于haproxy+mycat+mysql 架构方案讲义，希望能给大家在实际运用中带来一定的帮助。本文由于篇幅有限，难免会有不足和需要补充的地方，如有需要更加专业的解答，可在官网联系我们的24小时售前售后，随时帮您解答问题的。

haproxy+mycat+mysql 架构方案讲义

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