Keepalived+HAProxy基于读写分离方式实现discuz论坛
一、測(cè)試環(huán)境： centos 6.6；使用8臺(tái)虛擬機(jī)（上圖）
分別對(duì)它們?cè)O(shè)置主機(jī)名：
| 主機(jī)名 | ip地址 | 軟件包 |
| 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 |
上述服務(wù)器實(shí)現(xiàn)的作用介紹：
①keepalived+haproxy，實(shí)現(xiàn)高可用和haproxy的反向代理功能并實(shí)現(xiàn)動(dòng)靜分離的效果；請(qǐng)求動(dòng)態(tài)的內(nèi)容交給后端的動(dòng)態(tài)服務(wù)器組（php1或php2）；靜態(tài)內(nèi)容交給靜態(tài)服務(wù)器組（web1和web2）
②mysql服務(wù)器存儲(chǔ)discuz數(shù)據(jù)庫(kù)
③nfs文件共享服務(wù)器設(shè)置2個(gè)目錄/mydata和/discuz；前者給mysql服務(wù)器用做當(dāng)datadir使用；后者給web和php服務(wù)器使用，共享discuz網(wǎng)頁(yè)文件
二、準(zhǔn)備工作：這里基于ansible的playbook部署
1、ansible使用環(huán)境為centos 7；設(shè)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?nfs2、ansible設(shè)置及管理節(jié)點(diǎn)探測(cè)：
#?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定義roles如下：
[root@localhost?ansible_playbooks]#?tree . |--?haproxy.yml?????????????????//playbook劇本 `--?roles???????????????????????//定義的角色（7個(gè)）?????????|--?haproxy?????????????????//node1,node2節(jié)點(diǎn)用到的haproxy|???|--?files|???|--?handlers|???|???`--?main.yml|???|--?tasks|???|???`--?main.yml|???|--?templates|???|???|--?haproxy.cfg.j2|???|???`--?rsyslog.conf|???`--?vars|???????`--?main.yml|--?httpd?????????????????//web1，web2節(jié)點(diǎn)用到的httpd|???|--?files|???|???`--?mountnfs.sh|???|--?handlers|???|--?tasks|???|???`--?main.yml|???`--?templates|???????`--?httpd.conf.j2|--?initialization???????????????//所有節(jié)點(diǎn)用到的系統(tǒng)初始化|???|--?files|???|--?handlers|???|--?tasks|???|???`--?main.yml|???`--?templates|???????|--?hosts|???????|--?resolv.conf|???????`--?selinux.conf|--?keepalived?????????????????//keepalived設(shè)置?|???|--?files|???|???`--?notify.sh|???|--?handlers|???|???`--?main.yml|???|--?tasks|???|???`--?main.yml|???|--?templates|???|???|--?keepalived.conf.backup.j2|???|???`--?keepalived.conf.master.j2|???`--?vars|???????`--?main.yml|--?mysql??????????????????????//mysql數(shù)據(jù)庫(kù)|???|--?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節(jié)點(diǎn)用到的相關(guān)配置|--?files|???|--?install-php.sh|???`--?mountnfs.sh|--?handlers|--?tasks|???`--?main.yml`--?templates`--?httpd.conf.j24、介紹上述roles代表的含義，從上至下進(jìn)行介紹；
4.1、haproxy
| handlers:main.yml | - name: restart haproxy ? ? ? //重啟haproxy服務(wù) ? service: name=haproxy state=restarted - name: restart rsyslog ? ? ?//重啟rsyslog服務(wù) ? 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，動(dòng)靜分離，后端服務(wù)器定義 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 |
| vars:main.yml | web1_ip : 172.16.16.3 ? ? ? ? ? //靜態(tài)web1服務(wù)器ip web2_ip : 172.16.16.4 ? ? ? ? ?//靜態(tài)web2服務(wù)器ip php1_ip : 172.16.16.2 ? ? ? ??//動(dòng)態(tài)php1服務(wù)器ip php2_ip : 172.16.16.8 ? ? ? ?//動(dòng)態(tài)php2服務(wù)器ip |
4.2、httpd
| files：mountnfs.sh | yum install -y nfs-utils &> /dev/null ? //掛載nfs共享目錄 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 ? template: src=httpd.conf.j2 dest=/etc/httpd/conf/httpd.conf - name: start httpd service ? service: name=httpd state=started |
| templates:http.conf.j2 | LogFormat?%{X-Forwarded-For}i?combined ?//將客戶端ip記入日志 |
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 ? 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 |
| templates:3個(gè)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 | 通知機(jī)制：當(dāng)主從發(fā)生變化的時(shí)候給管理員發(fā)郵件 |
| 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個(gè)文件 | (1)mariadb-5.5.43.sh: 編譯安裝配置mariadb的腳本，就不發(fā)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 ? 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 |
| templates:exports | /mydata ? ?172.16.0.0/16(rw,no_root_squash)//編譯安裝mysql需要這樣設(shè)置，安裝完可以改成rw權(quán)限即可 /discuz ? ?172.16.0.0/16(rw) |
4.7、php
| files：2個(gè)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使用的腳本 |
| 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 ? template: src=httpd.conf.j2 dest=/etc/httpd/conf/httpd.conf - name: start httpd service ? service: name=httpd state=started |
| templates:httpd.conf.j2 | 這個(gè)模板也同httpd使用的！ |
三、執(zhí)行過(guò)程如下?
[root@localhost?ansible_playbooks]#?ansible-playbook?haproxy.yml?//執(zhí)行ansible劇本?PLAY?[nfs]?********************************************************************?GATHERING?FACTS?***************************************************************? ok:?[172.16.16.252]???????????????TASK:?[initialization?|?set?selinux]?******************************************? changed:?[172.16.16.252]???????????????????????//設(shè)置selinuxTASK:?[initialization?|?install?libselinux-python?package]?********************? changed:?[172.16.16.252]???????????????????????//需要安裝libselinux-pythonTASK:?[initialization?|?copy?hosts?to?all?node?/etc/hosts]?********************? changed:?[172.16.16.252]??????????????????????//復(fù)制主機(jī)名解析文件TASK:?[initialization?|?copy?resolv.conf?to?all?node?/etc/resolv.conf]?********? changed:?[172.16.16.252]????????????????????//復(fù)制域名文件TASK:?[initialization?|?install?ntpdate?package]?******************************? changed:?[172.16.16.252]?????????????????????//安裝ntpdateTASK:?[initialization?|?synctime?from?ntp.sjtu.edu.cn]?************************? changed:?[172.16.16.252]//同步時(shí)間 TASK:?[initialization?|?set?a?cron?to?synctime?from?ntp.sjtu.edu.cn]?**********??????????????????????????????????????????????//設(shè)置計(jì)劃任務(wù) changed:?[172.16.16.252]TASK:?[initialization?|?modify?selinux?configuration]?*************************? changed:?[172.16.16.252]????????????????????????//修改selinuxTASK:?[initialization?|?set?selinux?permissive]?*******************************? changed:?[172.16.16.252]TASK:?[nfs?|?mkdir?share?directory?to?mysql?and?web]?**************************? changed:?[172.16.16.252]??????????????//創(chuàng)建nfs的共享目錄/mydata和/discuz?TASK:?[nfs?|?install?nfs?package]?*********************************************? changed:?[172.16.16.252]????????????????//安裝nfs-utilsTASK:?[nfs?|?useradd?mysql]?***************************************************? changed:?[172.16.16.252]?????????????????//添加mysql用戶TASK:?[nfs?|?useradd?apache]?**************************************************? changed:?[172.16.16.252]????????????????//添加apache用戶TASK:?[nfs?|?copy?exports?to?nfs?node]?****************************************? changed:?[172.16.16.252]????????????????//設(shè)置nfs導(dǎo)出的共享目錄TASK:?[nfs?|?set?mysql?mode(rwx)?to?/mydata]?**********************************? changed:?[172.16.16.252]????????????????//給mysql對(duì)/mydata的rwx權(quán)限TASK:?[nfs?|?set?apache?mode(rwx)?to?/discuz]?*********************************? changed:?[172.16.16.252]????????????????//給apache對(duì)/discuz的rwx權(quán)限TASK:?[nfs?|?copy?Discuz_X3.1_SC_UTF8.zip?package]?****************************? changed:?[172.16.16.252]???????????????//復(fù)制discuz安裝包到nfs服務(wù)器TASK:?[nfs?|?install?unzip?package]?*******************************************? changed:?[172.16.16.252]????????????????//解壓discuzTASK:?[nfs?|?configuration?discuz]?********************************************? changed:?[172.16.16.252]?????????????????//配置discuz網(wǎng)頁(yè)文件（給其對(duì)應(yīng)訪問(wèn)權(quán)限）?TASK:?[nfs?|?start?rpcbind?service]?*******************************************? changed:?[172.16.16.252]?????????????????//啟動(dòng)rpcbind服務(wù)TASK:?[nfs?|?start?nfs?service]?***********************************************? changed:?[172.16.16.252]???????????????//啟動(dòng)nfs服務(wù)PLAY?[db]?*********************************************************************?//安裝及配置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]????????????????//復(fù)制mariadb到mysql服務(wù)器TASK:?[mysql?|?install?mysql?and?cofiguration]?********************************? changed:?[172.16.16.5]?????????????????//腳本執(zhí)行mysql安裝，配置TASK:?[mysql?|?start?mysqld?service]?******************************************? changed:?[172.16.16.5]??????????????//啟動(dòng)mysqld服務(wù)TASK:?[mysql?|?privileges?to?dzuser]?******************************************? changed:?[172.16.16.5]??????????????//使用腳本創(chuàng)建discuz數(shù)據(jù)庫(kù)，并給dzuser授權(quán)PLAY?[static_servers]?*********************************************************?//靜態(tài)服務(wù)器設(shè)置?web1和web2節(jié)點(diǎn) 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]????????????????//安裝httpd軟件包 changed:?[172.16.16.4]?????????TASK:?[httpd?|?mount?nfs?share?directory?/discuz]?*****************************? changed:?[172.16.16.3]?????????????????//掛載nfs服務(wù)器共享的discuz目錄至/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]?????????????????//啟動(dòng)httpd服務(wù) changed:?[172.16.16.4]PLAY?[dynamic_servers]?********************************************************?//設(shè)置動(dòng)態(tài)服務(wù)器php1和php2節(jié)點(diǎn) 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]??????????????//安裝php軟件包（使用的是centos?6系統(tǒng)自帶的） changed:?[172.16.16.2]TASK:?[php?|?mount?nfs?share?directory?/discuz]?*******************************? changed:?[172.16.16.8]?????????????//掛載discuz目錄至/var/www/html? changed:?[172.16.16.2]TASK:?[php?|?set?configuration]?***********************************************? changed:?[172.16.16.8]??????????????//配置httpd.conf，給日志加入客戶端訪問(wèn)的ip地址 changed:?[172.16.16.2]??????????TASK:?[php?|?start?httpd?service]?*********************************************? changed:?[172.16.16.8]?????????????//啟用php功能 changed:?[172.16.16.2]PLAY?[haproxy]?****************************************************************?//安裝設(shè)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]????????????//安裝keepalived changed:?[172.16.16.12]?????????????????TASK:?[keepalived?|?copy?notify.sh?to?node1?and?node2]?************************???????????????????????????????? changed:?[172.16.16.12]???????????????//復(fù)制通知腳本給node1和node2? changed:?[172.16.16.11]TASK:?[keepalived?|?configure?keepalived?on?node1-master]?*********************? skipping:?[172.16.16.12]?????????????//設(shè)置node1為MASTER節(jié)點(diǎn) changed:?[172.16.16.11]TASK:?[keepalived?|?configure?keepalived?on?node2-backup]?*********************? skipping:?[172.16.16.11]???????????//設(shè)置node2為BACKUP節(jié)點(diǎn) changed:?[172.16.16.12]???????TASK:?[keepalived?|?start?keepalived?service]?*********************************? changed:?[172.16.16.12]????????????//啟動(dòng)keepalived服務(wù)??? changed:?[172.16.16.11]TASK:?[haproxy?|?install?haproxy?package]?*************************************? changed:?[172.16.16.12]???????????????//安裝haproxy軟件包 changed:?[172.16.16.11]TASK:?[haproxy?|?configuration?haproxy]?***************************************? changed:?[172.16.16.12]?????????????//配置haproxy，實(shí)現(xiàn)動(dòng)靜分離 changed:?[172.16.16.11]TASK:?[haproxy?|?configuration?rsyslog?for?haproxy]?***************************? changed:?[172.16.16.11]??????????//記錄haproxy的日志 changed:?[172.16.16.12]TASK:?[haproxy?|?start?haproxy?service]?***************************************? changed:?[172.16.16.12]??????????//啟動(dòng)haproxy服務(wù) changed:?[172.16.16.11]NOTIFIED:?[keepalived?|?restart?keepalived]?***********************************? changed:?[172.16.16.12]??????????//配置文件發(fā)生變化，重啟keepalived服務(wù) changed:?[172.16.16.11]NOTIFIED:?[haproxy?|?restart?haproxy]?*****************************************? changed:?[172.16.16.11]???????????//配置文件發(fā)生變化，重啟haproxy服務(wù) changed:?[172.16.16.12]????????NOTIFIED:?[haproxy?|?restart?rsyslog]?*****************************************? changed:?[172.16.16.12]???????//配置文件發(fā)生變化，重啟rsyslog服務(wù) 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、安裝discuz論壇?
安裝完成，使用vip：172.16.16.50測(cè)試正常！！如下圖：
五、額外測(cè)試過(guò)程：
（1）測(cè)試keepalived是否工作正常，在master出現(xiàn)問(wèn)題的時(shí)候，是否可以切換到backup上：?
[root@node1?keepalived]#?touch?down//通過(guò)keepalived配置文件定義腳本測(cè)試vip是否轉(zhuǎn)移到node2 [root@node1?keepalived]#?tail?/var/log/messages????//通過(guò)下面的日志可看出node1成為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?????????//通過(guò)下面的日志可看出node2成為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
這個(gè)時(shí)候訪問(wèn)discuz論壇仍然沒(méi)有問(wèn)題；說(shuō)明keepalived發(fā)揮了作用！
（2）測(cè)試haproxy是否可以實(shí)現(xiàn)讀寫(xiě)分離？方法：將所有static_servers的httpd服務(wù)停止，測(cè)試只提供php的功能，顯示效果如下圖
[root@web1?~]#?service?httpd?stop?????//停止web1和web2的httpd服務(wù)，提供靜態(tài)內(nèi)容顯示 [root@web2?~]#?service?httpd?stop# 可以看到上面的效果，圖片都已經(jīng)不再顯示，將web2加回來(lái)，然后再查看效果，沒(méi)查看http的訪問(wèn)日志
[root@web2?~]#?service?httpd?start???????//啟動(dòng)其中的一臺(tái) [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，終于將所有劇本，腳本，圖片，日志整理完成！
轉(zhuǎn)載于:https://blog.51cto.com/bengbengtu/1705914
總結(jié)
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