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：
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
- 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
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 p_w_picpaths, 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
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
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
- name: install httpd package
yum: name=httpd state=present
- name: mount nfs share directory /discuz
script: mountnfs.sh
- name: set configuration
template: src=httpd.conf.j2 dest=/etc/httpd/conf/httpd.conf
- name: start httpd service
service: name=httpd state=started
LogFormat %{X-Forwarded-For}i combined //将客户端ip记入日志
4.3、initialization
- 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
template: src=hosts dest=/etc/hosts
- name: copy resolv.conf to all node /etc/resolv.conf
template: src=resolv.conf dest=/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
template: src=selinux.conf dest=/etc/selinux/conf
- name: set selinux permissive
shell: setenforce 0
(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
通知机制：当主从发生变化的时候给管理员发邮件
- name: restart keepalived
service: name=keepalived state=restarted
- 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
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
4.5、mysql
(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
~
- 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
#!/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_*
- 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
template: src=exports dest=/etc/exports
- 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
/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
(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
- 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
template: src=httpd.conf.j2 dest=/etc/httpd/conf/httpd.conf
- name: start httpd service
service: name=httpd state=started
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/p_w_picpath/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/p_w_picpath/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/p_w_picpath/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/p_w_picpath/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/p_w_picpath/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/p_w_picpath/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/p_w_picpath/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/p_w_picpath/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/p_w_picpath/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/p_w_picpath/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！
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