Keepalived+HAProxy基于读写分离方式实现discuz论坛

时间：2015-10-25 06:20:42 阅读：720 评论：0 收藏：0 [点我收藏+]

一、测试环境： centos 6.6；使用8台虚拟机（上图）

分别对它们设置主机名：

主机名	ip地址	软件包
node1	172.16.16.11	keepalived+haproxy
node2	172.16.16.12	keepalived+haproxy
php1	172.16.16.2	httpd+php+php-mysql+nfs-utils
php2	172.16.16.8	httpd+php+php-mysql+nfs-utils
web1	172.16.16.3	httpd
web2	172.16.16.4	httpd
mysql	172.16.16.5	mariadb-5.5.43-linux-x86_64.tar.gz
nfs	172.16.16.252	nfs-utils

上述服务器实现的作用介绍：

①keepalived+haproxy，实现高可用和haproxy的反向代理功能并实现动静分离的效果；请求动态的内容交给后端的动态服务器组（php1或php2）；静态内容交给静态服务器组（web1和web2）

②mysql服务器存储discuz数据库

③nfs文件共享服务器设置2个目录/mydata和/discuz；前者给mysql服务器用做当datadir使用；后者给web和php服务器使用，共享discuz网页文件

二、准备工作：这里基于ansible的playbook部署

1、ansible使用环境为centos 7；设置如下

# ssh-keygen -t rsa -P ‘‘ 
# ssh-copy-id -i ~/.ssh/id_rsa.pub node1
# ssh-copy-id -i ~/.ssh/id_rsa.pub node2
# ssh-copy-id -i ~/.ssh/id_rsa.pub web1
# ssh-copy-id -i ~/.ssh/id_rsa.pub web2
# ssh-copy-id -i ~/.ssh/id_rsa.pub php1
# ssh-copy-id -i ~/.ssh/id_rsa.pub php2
# ssh-copy-id -i ~/.ssh/id_rsa.pub mysql
# ssh-copy-id -i ~/.ssh/id_rsa.pub nfs

2、ansible设置及管理节点探测：

# vim /etc/ansible/host
[haproxy]
172.16.16.11
172.16.16.12

[dynamic_servers]
172.16.16.2
172.16.16.8

[static_servers]
172.16.16.3
172.16.16.4

[db]
172.16.16.5

[nfs]
172.16.16.252


# ansible all -m ping        
172.16.16.12 | success >> {
    "changed": false, 
    "ping": "pong"
}

172.16.16.3 | success >> {
    "changed": false, 
    "ping": "pong"
}

172.16.16.11 | success >> {
    "changed": false, 
    "ping": "pong"
}

172.16.16.4 | success >> {
    "changed": false, 
    "ping": "pong"
}

172.16.16.5 | success >> {
    "changed": false, 
    "ping": "pong"
}

172.16.16.2 | success >> {
    "changed": false, 
    "ping": "pong"
}

172.16.16.8 | success >> {
    "changed": false, 
    "ping": "pong"
}

172.16.16.252 | success >> {
    "changed": false, 
    "ping": "pong"
}

3、ansible定义roles如下：

[root@localhost ansible_playbooks]# tree
.
|-- haproxy.yml                 //playbook剧本
`-- roles                       //定义的角色（7个）         
    |-- haproxy                 //node1,node2节点用到的haproxy
    |   |-- files
    |   |-- handlers
    |   |   `-- main.yml
    |   |-- tasks
    |   |   `-- main.yml
    |   |-- templates
    |   |   |-- haproxy.cfg.j2
    |   |   `-- rsyslog.conf
    |   `-- vars
    |       `-- main.yml
    |-- httpd                 //web1，web2节点用到的httpd
    |   |-- files
    |   |   `-- mountnfs.sh
    |   |-- handlers
    |   |-- tasks
    |   |   `-- main.yml
    |   `-- templates
    |       `-- httpd.conf.j2
    |-- initialization               //所有节点用到的系统初始化
    |   |-- files
    |   |-- handlers
    |   |-- tasks
    |   |   `-- main.yml
    |   `-- templates
    |       |-- hosts
    |       |-- resolv.conf
    |       `-- selinux.conf
    |-- keepalived                 //keepalived设置 
    |   |-- files
    |   |   `-- notify.sh
    |   |-- handlers
    |   |   `-- main.yml
    |   |-- tasks
    |   |   `-- main.yml
    |   |-- templates
    |   |   |-- keepalived.conf.backup.j2
    |   |   `-- keepalived.conf.master.j2
    |   `-- vars
    |       `-- main.yml
    |-- mysql                      //mysql数据库
    |   |-- files
    |   |   |-- mariadb-5.5.43-linux-x86_64.tar.gz
    |   |   |-- mariadb-5.5.43.sh
    |   |   `-- privilege.sh
    |   |-- handlers
    |   |-- tasks
    |   |   `-- main.yml
    |   `-- templates
    |-- nfs                            //nfs文件共享
    |   |-- files
    |   |   |-- Discuz_X3.1_SC_UTF8.zip
    |   |   `-- discuz.sh
    |   |-- handlers
    |   |-- tasks
    |   |   `-- main.yml
    |   `-- templates
    |       `-- exports
    `-- php                    //php1,php2节点用到的相关配置
        |-- files
        |   |-- install-php.sh
        |   `-- mountnfs.sh
        |-- handlers
        |-- tasks
        |   `-- main.yml
        `-- templates
            `-- httpd.conf.j2

4、介绍上述roles代表的含义，从上至下进行介绍；

4.1、haproxy

handlers:main.yml	- name: restart haproxy //重启haproxy服务 service: name=haproxy state=restarted - name: restart rsyslog //重启rsyslog服务 service: name=rsyslog state=restarted
tasks:main.yml	- name: install haproxy package yum: name=haproxy state=present - name: configuration haproxy template: src=haproxy.cfg.j2 dest=/etc/haproxy/haproxy.cfg notify: - restart haproxy tags: cfg - name: configuration rsyslog for haproxy template: src=rsyslog.conf dest=/etc/rsyslog.conf notify: - restart rsyslog - name: start haproxy service service: name=haproxy state=started enabled=yes
template	haproxy.cfg.j2: //只截取了重要的部分，动静分离，后端服务器定义 frontend http bind *:80 mode http log global option httpclose option logasap option dontlognull acl url_static path_end -i .jpg .gif .png .css .js .html .ico use_backend static_servers if url_static default_backend dynamic_servers #--------------------------------------------------------------------- # static backend for serving up images, stylesheets and such #--------------------------------------------------------------------- backend static_servers balance roundrobin cookie WebID insert nocache server web1 {{ web1_ip }}:80 check cookie web1 server web2 {{ web2_ip }}:80 check cookie web2 #--------------------------------------------------------------------- # round robin balancing between the various backends #--------------------------------------------------------------------- backend dynamic_servers balance uri hash-type consistent server php1 {{ php1_ip }}:80 check cookie php1 server php2 {{ php2_ip }}:80 check cookie php2 rsyslog.conf
vars:main.yml	web1_ip : 172.16.16.3 //静态web1服务器ip web2_ip : 172.16.16.4 //静态web2服务器ip php1_ip : 172.16.16.2 //动态php1服务器ip php2_ip : 172.16.16.8 //动态php2服务器ip

4.2、httpd

files：mountnfs.sh

yum install -y nfs-utils &> /dev/null //挂载nfs共享目录

echo " 172.16.16.252:/discuz /var/www/html/ nfs defaults,_netdev 0 0 " >> /etc/fstab

mount -a

tasks:main.yml

- name: install httpd package

yum: name=httpd state=present

- name: mount nfs share directory /discuz

script: mountnfs.sh

- name: set configuration

- name: start httpd service

service: name=httpd state=started

templates:http.conf.j2

LogFormat %{X-Forwarded-For}i combined //将客户端ip记入日志

4.3、initialization

tasks：main.yml

- name: set selinux

shell: sed -i ‘s@^SELINUX=.*@SELINUX=permissive@‘ /etc/selinux/config

shell: setenforce 0

- name: install libselinux-python package

yum: name=libselinux-python state=present

- name: copy hosts to all node /etc/hosts

- name: copy resolv.conf to all node /etc/resolv.conf

- name: install ntpdate package

yum: name=ntpdate state=present

- name: synctime from ntp.sjtu.edu.cn

shell: ntpdate ntp.sjtu.edu.cn

- name: set a cron to synctime from ntp.sjtu.edu.cn

cron: name="cron to synctime from ntp.sjtu.edu.cn" minute="*/5" job="/usr/sbin/ntpdate ntp.sjtu.edu.cn &> /dev/null" state=present

- name: modify selinux configuration

- name: set selinux permissive

shell: setenforce 0

templates:3个文件

(1)hosts

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4

::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

172.16.16.11 node1

172.16.16.12 node2

172.16.16.3 web1

172.16.16.4 web2

172.16.16.2 php1

172.16.16.8 php2

172.16.16.5 mysql

172.16.16.252 nfs

(2)resolv.conf

nameserver 172.16.0.1

(3)selinux.conf

SELINUX=disabled

SELINUXTYPE=targeted

4.4、keepalived

files:notify.sh	通知机制：当主从发生变化的时候给管理员发邮件
handlers：main.yml	- name: restart keepalived service: name=keepalived state=restarted
tasks:main.yml	- name: install keepalived package yum: name=keepalived state=present - name: copy notify.sh to node1 and node2 copy: src=notify.sh dest=/etc/keepalived/notify.sh - name: configure keepalived on node1-master template: src=keepalived.conf.master.j2 dest=/etc/keepalived/keepalived.conf when: ansible_hostname == "node1" notify: - restart keepalived - name: configure keepalived on node2-backup template: src=keepalived.conf.backup.j2 dest=/etc/keepalived/keepalived.conf when: ansible_hostname == "node2" notify: - restart keepalived - name: start keepalived service service: name=keepalived state=started enabled=yes
templates	keepalived.conf.master.j2 ! Configuration File for keepalived global_defs { notification_email { root@localhost } notification_email_from keepalived@localhost smtp_connect_timeout 3 smtp_server 127.0.0.1 router_id LVS_DEVEL } vrrp_script chk_haproxy { script "killall -0 haproxy" interval 1 weight 2 } vrrp_script chk_mantaince_down { script "[[ -f /etc/keepalived/down ]] && exit 1 \|\| exit 0" interval 1 weight 2 } vrrp_instance VI_1 { interface eth0 state MASTER # BACKUP for slave routers priority 101 # 100 for BACKUP virtual_router_id 51 garp_master_delay 1 authentication { auth_type PASS auth_pass password12345 } track_interface { eth0 } virtual_ipaddress { {{ vip }}/16 dev eth0 label eth0:0 } track_script { chk_haproxy chk_mantaince_down } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault" } keepalived.conf.backup.j2 state BACKUP priority 100
vars:main.yml	vip : 172.16.16.50

4.5、mysql

files:3个文件

(1)mariadb-5.5.43.sh: 编译安装配置mariadb的脚本，就不发了，太多

(2)privilege.sh

#!/bin/bash

#! privilege to dzuser

echo "create database discuz;

grant all on discuz.* to ‘dzuser‘@‘172.16.%.%‘ identified by ‘dzpasswd‘;

flush privileges;

\q" | mysql

tasks:main.yml

- name: copy mariadb-5.5.43 package

copy: src=mariadb-5.5.43-linux-x86_64.tar.gz dest=/root/mariadb-5.5.43-linux-x86_64.tar.gz

- name: install mysql and cofiguration

script: mariadb-5.5.43.sh

- name: start mysqld service

shell: service mysqld start

- name: privileges to dzuser

script: privilege.sh

tags: haha

4.6、nfs

files：discuz.sh

#!/bin/bash

# discuz configuration

unzip -d /discuz /root/Discuz_X3.1_SC_UTF8.zip

chmod -R go+w /discuz/upload/config/

chmod -R go+w /discuz/upload/data/

chmod -R go+w /discuz/upload/uc_*

tasks:main.yml

- name: mkdir share directory to mysql and web

shell: mkdir -pv /{mydata,discuz}

- name: install nfs package

yum: name=nfs-utils state=present

- name: useradd mysql

user: name=mysql state=present system=yes

- name: useradd apache

user: name=apache state=present system=yes

- name: copy exports to nfs node

- name: set mysql mode(rwx) to /mydata

shell: setfacl -m u:mysql:rwx /mydata

- name: set apache mode(rwx) to /discuz

shell: setfacl -m u:apache:rwx /discuz

- name: copy Discuz_X3.1_SC_UTF8.zip package

copy: src=Discuz_X3.1_SC_UTF8.zip dest=/root/Discuz_X3.1_SC_UTF8.zip

- name: install unzip package

yum: name=unzip state=present

- name: configuration discuz

script: discuz.sh

- name: start rpcbind service

service: name=rpcbind state=started

- name: start nfs service

templates:exports

/mydata 172.16.0.0/16(rw,no_root_squash)//编译安装mysql需要这样设置，安装完可以改成rw权限即可

/discuz 172.16.0.0/16(rw)

4.7、php

files：2个文件

(1)install-php.sh

#!/bin/bash

# install nfs-utils httpd | php | php-mysql

yum install -y nfs-utils httpd php php-mysql openssl-devel &> /dev/null

(2)mountnfs.sh //同httpd使用的脚本

tasks：main.yml

- name: install nfs-utils | httpd | php | php-mysql package

script: install-php.sh

- name: mount nfs share directory /discuz

script: mountnfs.sh

- name: set configuration

- name: start httpd service

service: name=httpd state=started

templates:httpd.conf.j2

这个模板也同httpd使用的！

三、执行过程如下

[root@localhost ansible_playbooks]# ansible-playbook haproxy.yml //执行ansible剧本 

PLAY [nfs] ******************************************************************** 

GATHERING FACTS *************************************************************** 
ok: [172.16.16.252]               

TASK: [initialization | set selinux] ****************************************** 
changed: [172.16.16.252]                       //设置selinux

TASK: [initialization | install libselinux-python package] ******************** 
changed: [172.16.16.252]                       //需要安装libselinux-python

TASK: [initialization | copy hosts to all node /etc/hosts] ******************** 
changed: [172.16.16.252]                      //复制主机名解析文件

TASK: [initialization | copy resolv.conf to all node /etc/resolv.conf] ******** 
changed: [172.16.16.252]                    //复制域名文件

TASK: [initialization | install ntpdate package] ****************************** 
changed: [172.16.16.252]                     //安装ntpdate

TASK: [initialization | synctime from ntp.sjtu.edu.cn] ************************ 
changed: [172.16.16.252]
                                                 //同步时间
TASK: [initialization | set a cron to synctime from ntp.sjtu.edu.cn] **********                                              //设置计划任务
changed: [172.16.16.252]

TASK: [initialization | modify selinux configuration] ************************* 
changed: [172.16.16.252]                        //修改selinux

TASK: [initialization | set selinux permissive] ******************************* 
changed: [172.16.16.252]

TASK: [nfs | mkdir share directory to mysql and web] ************************** 
changed: [172.16.16.252]              //创建nfs的共享目录/mydata和/discuz 

TASK: [nfs | install nfs package] ********************************************* 
changed: [172.16.16.252]                //安装nfs-utils

TASK: [nfs | useradd mysql] *************************************************** 
changed: [172.16.16.252]                 //添加mysql用户

TASK: [nfs | useradd apache] ************************************************** 
changed: [172.16.16.252]                //添加apache用户

TASK: [nfs | copy exports to nfs node] **************************************** 
changed: [172.16.16.252]                //设置nfs导出的共享目录

TASK: [nfs | set mysql mode(rwx) to /mydata] ********************************** 
changed: [172.16.16.252]                //给mysql对/mydata的rwx权限

TASK: [nfs | set apache mode(rwx) to /discuz] ********************************* 
changed: [172.16.16.252]                //给apache对/discuz的rwx权限

TASK: [nfs | copy Discuz_X3.1_SC_UTF8.zip package] **************************** 
changed: [172.16.16.252]               //复制discuz安装包到nfs服务器

TASK: [nfs | install unzip package] ******************************************* 
changed: [172.16.16.252]                //解压discuz

TASK: [nfs | configuration discuz] ******************************************** 
changed: [172.16.16.252]                 //配置discuz网页文件（给其对应访问权限） 

TASK: [nfs | start rpcbind service] ******************************************* 
changed: [172.16.16.252]                 //启动rpcbind服务
 
TASK: [nfs | start nfs service] *********************************************** 
changed: [172.16.16.252]               //启动nfs服务

PLAY [db] ********************************************************************* 
                                         //安装及配置mysql
GATHERING FACTS *************************************************************** 
ok: [172.16.16.5]                 

TASK: [initialization | set selinux] ****************************************** 
changed: [172.16.16.5]

TASK: [initialization | install libselinux-python package] ******************** 
changed: [172.16.16.5]

TASK: [initialization | copy hosts to all node /etc/hosts] ******************** 
changed: [172.16.16.5]

TASK: [initialization | copy resolv.conf to all node /etc/resolv.conf] ******** 
changed: [172.16.16.5]

TASK: [initialization | install ntpdate package] ****************************** 
changed: [172.16.16.5]

TASK: [initialization | synctime from ntp.sjtu.edu.cn] ************************ 
changed: [172.16.16.5]

TASK: [initialization | set a cron to synctime from ntp.sjtu.edu.cn] ********** 
changed: [172.16.16.5]

TASK: [initialization | modify selinux configuration] ************************* 
changed: [172.16.16.5]

TASK: [initialization | set selinux permissive] ******************************* 
changed: [172.16.16.5]

TASK: [mysql | copy mariadb-5.5.43 package] *********************************** 
changed: [172.16.16.5]                //复制mariadb到mysql服务器

TASK: [mysql | install mysql and cofiguration] ******************************** 
changed: [172.16.16.5]                 //脚本执行mysql安装，配置
                                             
TASK: [mysql | start mysqld service] ****************************************** 
changed: [172.16.16.5]              //启动mysqld服务

TASK: [mysql | privileges to dzuser] ****************************************** 
changed: [172.16.16.5]              //使用脚本创建discuz数据库，并给dzuser授权

PLAY [static_servers] ********************************************************* 
                                   //静态服务器设置 web1和web2节点
GATHERING FACTS *************************************************************** 
ok: [172.16.16.3]
ok: [172.16.16.4]

TASK: [initialization | set selinux] ****************************************** 
changed: [172.16.16.3]
changed: [172.16.16.4]

TASK: [initialization | install libselinux-python package] ******************** 
changed: [172.16.16.3]
changed: [172.16.16.4]

TASK: [initialization | copy hosts to all node /etc/hosts] ******************** 
changed: [172.16.16.4]
changed: [172.16.16.3]

TASK: [initialization | copy resolv.conf to all node /etc/resolv.conf] ******** 
changed: [172.16.16.3]
changed: [172.16.16.4]

TASK: [initialization | install ntpdate package] ****************************** 
changed: [172.16.16.3]
changed: [172.16.16.4]

TASK: [initialization | synctime from ntp.sjtu.edu.cn] ************************ 
changed: [172.16.16.4]
changed: [172.16.16.3]

TASK: [initialization | set a cron to synctime from ntp.sjtu.edu.cn] ********** 
changed: [172.16.16.3]
changed: [172.16.16.4]

TASK: [initialization | modify selinux configuration] ************************* 
changed: [172.16.16.3]
changed: [172.16.16.4]

TASK: [initialization | set selinux permissive] ******************************* 
changed: [172.16.16.4]
changed: [172.16.16.3]

TASK: [httpd | install httpd package] ***************************************** 
changed: [172.16.16.3]                //安装httpd软件包
changed: [172.16.16.4]         

TASK: [httpd | mount nfs share directory /discuz] ***************************** 
changed: [172.16.16.3]                 //挂载nfs服务器共享的discuz目录至/var/www/html
changed: [172.16.16.4]

TASK: [httpd | set configuration] ********************************************* 
changed: [172.16.16.4]              //配置httpd.conf
changed: [172.16.16.3]

TASK: [httpd | start httpd service] ******************************************* 
changed: [172.16.16.3]                 //启动httpd服务
changed: [172.16.16.4]

PLAY [dynamic_servers] ******************************************************** 
                                    //设置动态服务器php1和php2节点
GATHERING FACTS *************************************************************** 
ok: [172.16.16.2]
ok: [172.16.16.8]

TASK: [initialization | set selinux] ****************************************** 
changed: [172.16.16.2]
changed: [172.16.16.8]

TASK: [initialization | install libselinux-python package] ******************** 
changed: [172.16.16.2]
changed: [172.16.16.8]

TASK: [initialization | copy hosts to all node /etc/hosts] ******************** 
changed: [172.16.16.8]
changed: [172.16.16.2]

TASK: [initialization | copy resolv.conf to all node /etc/resolv.conf] ******** 
changed: [172.16.16.8]
changed: [172.16.16.2]

TASK: [initialization | install ntpdate package] ****************************** 
changed: [172.16.16.2]
changed: [172.16.16.8]

TASK: [initialization | synctime from ntp.sjtu.edu.cn] ************************ 
changed: [172.16.16.2]
changed: [172.16.16.8]

TASK: [initialization | set a cron to synctime from ntp.sjtu.edu.cn] ********** 
changed: [172.16.16.8]
changed: [172.16.16.2]

TASK: [initialization | modify selinux configuration] ************************* 
changed: [172.16.16.8]
changed: [172.16.16.2]

TASK: [initialization | set selinux permissive] ******************************* 
changed: [172.16.16.8]
changed: [172.16.16.2]

TASK: [php | install nfs-utils | httpd | php | php-mysql package] ************* 
changed: [172.16.16.8]              //安装php软件包（使用的是centos 6系统自带的）
changed: [172.16.16.2]

TASK: [php | mount nfs share directory /discuz] ******************************* 
changed: [172.16.16.8]             //挂载discuz目录至/var/www/html 
changed: [172.16.16.2]

TASK: [php | set configuration] *********************************************** 
changed: [172.16.16.8]              //配置httpd.conf，给日志加入客户端访问的ip地址
changed: [172.16.16.2]          

TASK: [php | start httpd service] ********************************************* 
changed: [172.16.16.8]             //启用php功能
changed: [172.16.16.2]

PLAY [haproxy] **************************************************************** 
                                   //安装设置keepalived+haproxy（node1和node2）
GATHERING FACTS *************************************************************** 
ok: [172.16.16.12]
ok: [172.16.16.11]

TASK: [initialization | set selinux] ****************************************** 
changed: [172.16.16.12]
changed: [172.16.16.11]

TASK: [initialization | install libselinux-python package] ******************** 
changed: [172.16.16.12]
changed: [172.16.16.11]

TASK: [initialization | copy hosts to all node /etc/hosts] ******************** 
changed: [172.16.16.12]
changed: [172.16.16.11]

TASK: [initialization | copy resolv.conf to all node /etc/resolv.conf] ******** 
changed: [172.16.16.11]
changed: [172.16.16.12]

TASK: [initialization | install ntpdate package] ****************************** 
ok: [172.16.16.12]
ok: [172.16.16.11]

TASK: [initialization | synctime from ntp.sjtu.edu.cn] ************************ 
changed: [172.16.16.12]
changed: [172.16.16.11]

TASK: [initialization | set a cron to synctime from ntp.sjtu.edu.cn] ********** 
changed: [172.16.16.11]
changed: [172.16.16.12]

TASK: [initialization | modify selinux configuration] ************************* 
changed: [172.16.16.11]
changed: [172.16.16.12]

TASK: [initialization | set selinux permissive] ******************************* 
changed: [172.16.16.11]
changed: [172.16.16.12]

TASK: [keepalived | install keepalived package] ******************************* 
changed: [172.16.16.11]            //安装keepalived
changed: [172.16.16.12]                 

TASK: [keepalived | copy notify.sh to node1 and node2] ************************                                
changed: [172.16.16.12]               //复制通知脚本给node1和node2 
changed: [172.16.16.11]

TASK: [keepalived | configure keepalived on node1-master] ********************* 
skipping: [172.16.16.12]             //设置node1为MASTER节点
changed: [172.16.16.11]

TASK: [keepalived | configure keepalived on node2-backup] ********************* 
skipping: [172.16.16.11]           //设置node2为BACKUP节点
changed: [172.16.16.12]       

TASK: [keepalived | start keepalived service] ********************************* 
changed: [172.16.16.12]            //启动keepalived服务   
changed: [172.16.16.11]

TASK: [haproxy | install haproxy package] ************************************* 
changed: [172.16.16.12]               //安装haproxy软件包
changed: [172.16.16.11]

TASK: [haproxy | configuration haproxy] *************************************** 
changed: [172.16.16.12]             //配置haproxy，实现动静分离
changed: [172.16.16.11]

TASK: [haproxy | configuration rsyslog for haproxy] *************************** 
changed: [172.16.16.11]          //记录haproxy的日志
changed: [172.16.16.12]

TASK: [haproxy | start haproxy service] *************************************** 
changed: [172.16.16.12]          //启动haproxy服务
changed: [172.16.16.11]

NOTIFIED: [keepalived | restart keepalived] *********************************** 
changed: [172.16.16.12]          //配置文件发生变化，重启keepalived服务
changed: [172.16.16.11]

NOTIFIED: [haproxy | restart haproxy] ***************************************** 
changed: [172.16.16.11]           //配置文件发生变化，重启haproxy服务
changed: [172.16.16.12]        

NOTIFIED: [haproxy | restart rsyslog] ***************************************** 
changed: [172.16.16.12]       //配置文件发生变化，重启rsyslog服务
changed: [172.16.16.11]

PLAY RECAP ******************************************************************** 
172.16.16.11               : ok=21   changed=19   unreachable=0    failed=0   
172.16.16.12               : ok=21   changed=19   unreachable=0    failed=0   
172.16.16.2                : ok=14   changed=13   unreachable=0    failed=0   
172.16.16.252              : ok=22   changed=21   unreachable=0    failed=0   
172.16.16.3                : ok=14   changed=13   unreachable=0    failed=0   
172.16.16.4                : ok=14   changed=13   unreachable=0    failed=0   
172.16.16.5                : ok=14   changed=13   unreachable=0    failed=0   
172.16.16.8                : ok=14   changed=13   unreachable=0    failed=0

四、安装discuz论坛

安装完成，使用vip：172.16.16.50测试正常！！如下图：

五、额外测试过程：

（1）测试keepalived是否工作正常，在master出现问题的时候，是否可以切换到backup上：

[root@node1 keepalived]# touch down//通过keepalived配置文件定义脚本测试vip是否转移到node2
[root@node1 keepalived]# tail /var/log/messages    //通过下面的日志可看出node1成为BACKUP
Oct 24 20:08:19 node1 Keepalived_vrrp[2644]: VRRP_Script(chk_mantaince_down) failed
Oct 24 20:08:21 node1 Keepalived_vrrp[2644]: VRRP_Instance(VI_1) Received higher prio advert
Oct 24 20:08:21 node1 Keepalived_vrrp[2644]: VRRP_Instance(VI_1) Entering BACKUP STATE
Oct 24 20:08:21 node1 Keepalived_vrrp[2644]: VRRP_Instance(VI_1) removing protocol VIPs.
Oct 24 20:08:21 node1 Keepalived_healthcheckers[2643]: Netlink reflector reports IP 172.16.16.50 removed


[root@node2 ~]# tail /var/log/messages         //通过下面的日志可看出node2成为MASTER
Oct 24 20:08:22 node2 Keepalived_vrrp[2442]: VRRP_Instance(VI_1) Transition to MASTER STATE
Oct 24 20:08:23 node2 Keepalived_vrrp[2442]: VRRP_Instance(VI_1) Entering MASTER STATE
Oct 24 20:08:23 node2 Keepalived_vrrp[2442]: VRRP_Instance(VI_1) setting protocol VIPs.
Oct 24 20:08:23 node2 Keepalived_healthcheckers[2441]: Netlink reflector reports IP 172.16.16.50 added
Oct 24 20:08:23 node2 Keepalived_vrrp[2442]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 172.16.16.50

[root@node1 keepalived]# tail /var/log/haproxy.log 
Oct 24 20:08:21 node1 Keepalived_healthcheckers[2643]: Netlink reflector reports IP 172.16.16.50 removed
[root@node2 ~]# tail /var/log/haproxy.log 
Oct 24 20:08:23 node2 Keepalived_healthcheckers[2441]: Netlink reflector reports IP 172.16.16.50 added

这个时候访问discuz论坛仍然没有问题；说明keepalived发挥了作用！

（2）测试haproxy是否可以实现读写分离？方法：将所有static_servers的httpd服务停止，测试只提供php的功能，显示效果如下图

[root@web1 ~]# service httpd stop     //停止web1和web2的httpd服务，提供静态内容显示
[root@web2 ~]# service httpd stop

# 可以看到上面的效果，图片都已经不再显示，将web2加回来，然后再查看效果，没查看http的访问日志

[root@web2 ~]# service httpd start       //启动其中的一台
[root@web2 ~]# tail /var/log/httpd/access_log 
172.16.0.3 - - [24/Oct/2015:20:46:54 +0800] "GET /static/image/common/user_online.gif HTTP/1.1" 200 868 "http://172.16.16.50/data/cache/style_1_common.css?SFA" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
172.16.0.3 - - [24/Oct/2015:20:46:54 +0800] "GET /static/image/common/arrwd.gif HTTP/1.1" 200 51 "http://172.16.16.50/data/cache/style_1_common.css?SFA" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
172.16.0.3 - - [24/Oct/2015:20:46:54 +0800] "GET /static/image/common/qmenu.png HTTP/1.1" 200 225 "http://172.16.16.50/data/cache/style_1_common.css?SFA" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
172.16.0.3 - - [24/Oct/2015:20:46:54 +0800] "GET /static/image/common/nv.png HTTP/1.1" 200 1939 "http://172.16.16.50/data/cache/style_1_common.css?SFA" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
172.16.0.3 - - [24/Oct/2015:20:46:54 +0800] "GET /static/image/common/nv_a.png HTTP/1.1" 200 2076 "http://172.16.16.50/data/cache/style_1_common.css?SFA" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
172.16.0.3 - - [24/Oct/2015:20:46:54 +0800] "GET /static/image/common/search.png HTTP/1.1" 200 1301 "http://172.16.16.50/data/cache/style_1_common.css?SFA" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
172.16.0.3 - - [24/Oct/2015:20:46:54 +0800] "GET /static/image/common/chart.png HTTP/1.1" 200 990 "http://172.16.16.50/data/cache/style_1_forum_index.css?SFA" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
172.16.0.3 - - [24/Oct/2015:20:46:54 +0800] "GET /static/image/common/pt_item.png HTTP/1.1" 200 3598 "http://172.16.16.50/data/cache/style_1_common.css?SFA" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
172.16.0.3 - - [24/Oct/2015:20:46:54 +0800] "GET /static/image/common/titlebg.png HTTP/1.1" 200 315 "http://172.16.16.50/data/cache/style_1_common.css?SFA" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"
172.16.0.3 - - [24/Oct/2015:20:46:55 +0800] "GET /static/image/common/scrolltop.png HTTP/1.1" 200 1383 "http://172.16.16.50/data/cache/style_1_common.css?SFA" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36"

至此，终于将所有剧本，脚本，图片，日志整理完成！

本文出自 “bengbengtu” 博客，请务必保留此出处http://bengbengtu.blog.51cto.com/9505633/1705914

Keepalived+HAProxy基于读写分离方式实现discuz论坛

标签：php mysql discuz httpd keepalived

原文地址：http://bengbengtu.blog.51cto.com/9505633/1705914

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