一、實驗拓撲

?二、實驗說明

? 該試驗是基于corosync和NfS服務(wù)器實現(xiàn)了LNMP的高可用，當一個節(jié)點出現(xiàn)故障時，所有的資源會自動轉(zhuǎn)移到另一節(jié)點，從而能夠正常提供服務(wù)

三、實驗準備

1.修改兩臺主機名使其uname?-n的保持一致?

???????#vim?/etc/sysconfig/network?修改為?hostname=node1?

???????#hostname?node1?

???????#unanme?-n?

?2.修改hosts文件，因為高可用集群服務(wù)的解析依賴與自己的hosts文件?

???????編輯Director1、2的/etc/hosts文件，添加如下內(nèi)容?

???????172.16.29.1??node1?

???????172.16.29.2??node2?

?3.配置系統(tǒng)時間，使兩臺的時間保持一致?

?4.配置Director的ssh，以實現(xiàn)雙機互信?

??????node1?

???????#ssh-keygen?-t?rsa?

???????#ssh-copy-id?-i?.ssh/id_rsa.pub?root@node2?

???????#ssh?node2?'ifconfig'?測試連接?

????node2?

???????#ssh-keygen?-t?rsa?

???????#ssh-copy-id?-i?.ssh/id_rsa.pub?root@node1?

???????#ssh?node1?'ifconfig'?測試連接?

四、實驗步驟

配置NFS共享服務(wù)

.創(chuàng)建邏輯卷?

#fdisk?/dev/sda??

#partprobe?/dev/sda??

#pvcreate?/dev/sda5??

#vgcreate?myvg?/dev/sda5???

#lvcreate?-n?mylv?-L?10G?myvg??

#mke2fs?-j?/dev/myvg/mylv??

2.創(chuàng)建共享目錄并開機自動掛載邏輯卷?

#mkdir?/mydata???????????????????//創(chuàng)建共享目錄??

#vim?/etc/fstab??????????????????//開機自動掛載??

?????/dev/myvg/mydata????????/mydata?????????ext3????defaults????????0?0??

3.添加mysql用戶?

#groupadd?-g?306?-r?mysql??

useradd?-g?mysql?-r?-u?306?mysql??

#chown?mysql:mysql?/mydata???????//修改共享目錄的屬主屬組為mysql??

4.添加共享?

?#vim?/etc/exports?????????????????

??/mydata????172.16.29.1(rw,no_root_squash)?172.16.29.2(rw,no_root_squash)??

#exportfs?-ra?????????????????????//導出共享目錄???

#service?nfs?start?????????????????//啟動nfs服務(wù)??

#chkconfig?nfs?on???????????????????//開機自動啟動??

#showmount?-d?localhost??????????????????//查看是否導出成功??

??

配置node1和node2的LNMP

創(chuàng)建用戶和掛載目錄

添加用戶,用戶UID和NFS服務(wù)器上的mysql用戶a的UID相同?

#groupadd?-g?306?-r?mysql??

?#usradd?-g?mysql?-r?-u?306?mysql??

2、創(chuàng)建目錄并掛載?

?#mkdir?-pv?/mydata/data??

#chown?-R?mysql:mysql?/mydata/data??

#mount?-t?nfs?172.16.26.1:/sharedata??/mydata/data??

安裝mysql 在這里需要說明一下，在節(jié)點node1上執(zhí)行如下步驟后，在節(jié)點node2上不需要初始化mysql即可啟動。

#tar?xf?mysql-5.5.20-linux2.6-i686?-C?/usr/local??

#?cd??/usr/local??

#ln?-sv?mysql-5.5.20-linux2.6-i686??mysql?//創(chuàng)建連接???

#chown?-R?mysql:mysql?.??

#cp?support-files/my-large.cnf??/etc/my.cnf??//配置文件??

#vim?/etc/my.cnf???

?????在[mysqld]處?添加datadir=/mydata/data????//添加數(shù)據(jù)存放位置??

#scripts/mysql_install_db?--user=mysql?--datadir=/mydata/data?//初始化Mysql??

#chown?-R?root?.??

#cp?support-files/mysql.server??/etc/rc.d/init.d/mysqld?//提供mysql腳本??

#servie?mysqld?start??

#/usr/local/mysql/bin/mysql????????//啟動并測試mysql是否可用??

#service?mysqld?stop?????????????????????//必須關(guān)閉，否則在節(jié)點2上無法啟動??

#scp?/etc/my.cnf?node2:/etc/my.cnf???????????//把mysql的配置文件復制到node2上??

#scp?/etc/rc.d/init.d/mysqld?node2:/etc/rc.d/init.d/mysqld??//復制服務(wù)腳本??

安裝nginx

1.解決依賴關(guān)系???

#yum?-y?groupinstall?"Development?Libraries"???

#yum?-y?install?pcre-devel???

2.添加用戶，實現(xiàn)以之運行nginx服務(wù)進程???

#?groupadd?-r?nginx???

#?useradd?-r?-g?nginx?-s?/bin/false?-M?nginx???

3、編譯安裝???

#tax?xf?nginx-1.0.4.tar.gz???

#cd?nginx-1.0.4???

#./configure?\???

??--prefix=/usr?\???

??--sbin-path=/usr/sbin/nginx?\???

??--conf-path=/etc/nginx/nginx.conf?\???

??--error-log-path=/var/log/nginx/error.log?\???

??--http-log-path=/var/log/nginx/access.log?\???

??--pid-path=/var/run/nginx/nginx.pid??\???

??--lock-path=/var/lock/nginx.lock?\???

??--user=nginx?\???

??--group=nginx?\???

??--with-http_ssl_module?\???

??--with-http_flv_module?\???

??--with-http_stub_status_module?\???

??--with-http_gzip_static_module?\???

??--http-client-body-temp-path=/var/tmp/nginx/client/?\???

??--http-proxy-temp-path=/var/tmp/nginx/proxy/?\???

??--http-fastcgi-temp-path=/var/tmp/nginx/fcgi/?\???

??--http-uwsgi-temp-path=/var/tmp/nginx/uwsgi?\???

??--http-scgi-temp-path=/var/tmp/nginx/scgi?\???

??--with-pcre???

#make?&&?make?install???

提供nginx的服務(wù)腳本,腳本內(nèi)容這里就不再給出

#vim /etc/rc.d/init.d/nginx

#?chmod?+x?/etc/rc.d/init.d/nginx?

#service?nginx?start?

安裝php

php所依賴的包，使用rpm?-Uvh升級安裝?

libmcrypt-2.5.8-4.el5.centos.i386.rpm?

libmcrypt-devel-2.5.8-4.el5.centos.i386.rpm?

mhash-0.9.9-1.el5.centos.i386.rpm?

mhash-devel-0.9.9-1.el5.centos.i386.rpm?

libevent-2.0.17-2.i386.rpm????/memecached?

libevent-devel-2.0.17-2.i386.rpm?

mcrypt-2.6.8-1.el5.i386.rpm?

#?tar?xf?php-5.3.10.tar.bz2?

#?cd?php-5.3.10?

#./configure? \

--prefix=/usr/local/php?\

--with-mysql=/usr/local/mysql?\

--with-openssl?--enable-fpm?--enable-sockets?--enable-sysvshm?\

?--with-mysqli=/usr/local/mysql/bin/mysql_config? \

--enable-mbstring?--with-freetype-dir?--with-jpeg-dir?\

--with-png-dir?--with-zlib-dir?\

--with-libxml-dir=/usr?--enable-xml? --with-mhash?--with-mcrypt?\

?--with-config-file-path=/etc/php\

?--with-config-file-scan-dir=/etc/php?--with-bz2?--with-curl??\

#?make?

#?make?test?

#?make?intall?

為php提供配置文件：?

#?cp?php.ini-production?/etc/php/php.ini?

?

為php-fpm提供Sysv?init腳本，并將其添加至服務(wù)列表：?

#?cp?sapi/fpm/init.d.php-fpm??/etc/rc.d/init.d/php-fpm?

#?chmod?+x?/etc/rc.d/init.d/php-fpm?

#?chkconfig?--add?php-fpm?

#?chkconfig?php-fpm?on?

?

為php-fpm提供配置文件：?

#?cp?/usr/local/php/etc/php-fpm.conf.default?/usr/local/php/etc/php-fpm.conf??

?

編輯php-fpm的配置文件：?

#?vim?/usr/local/php/etc/php-fpm.conf?

配置pm.的相關(guān)選項為你所需要的值，并啟用pid文件（如下最后一行）：?

pm.max_children?=?50?

pm.start_servers?=?5?

pm.min_spare_servers?=?2?

pm.max_spare_servers?=?8?

pid?=?/usr/local/php/var/run/php-fpm.pid??

?

接下來就可以啟動php-fpm了：?

#?service?php-fpm?start?

?

使用如下命令來驗正（如果此命令輸出有中幾個php-fpm進程就說明啟動成功了）：?

#?ps?aux?|?grep?php-fpm?

整合nginx和php

1、編輯/etc/nginx/nginx.conf，啟用如下選項：?

location?~?\.php$?{?

????????????root???????????html;?

????????????fastcgi_pass???127.0.0.1:9000;?

????????????fastcgi_index??index.php;?

????????????fastcgi_param??SCRIPT_FILENAME??/scripts$fastcgi_script_name;?

????????????include????????fastcgi_params;?

????????}?

?

2、編輯/etc/nginx/fastcgi_params，添加如下行：?

fastcgi_param??SCRIPT_FILENAME????$document_root$fastcgi_script_name;?

?fastcgi_param SERVER_SOFTWARE nginx;

并在所支持的主頁面格式中添加php格式的主頁，類似如下：?

location?/?{?

????????????root???html;?

????????????index??index.php?index.html?index.htm;?

????????}???????

#?service?nginx?reload? //重新載入nginx的配置文件?

3、在/usr/html新建index.php的測試頁面，測試php是否能正常工作：?

#vim /user/html/inde.php

<?php?

phpinfo();?

?>?

在兩個節(jié)點上分別配置LNMP后，測試成功如下圖所示

測試成功后，關(guān)閉所有服務(wù)，并卸載mysql

#?service?nginx?stop?

#?service?mysqld?stop?

#?service?php-fpm?stop?

#?umount?/mydata/data?

安裝corosync

?cluster-glue-1.0.6-1.6.el5.i386.rpm?????libesmtp-1.0.4-5.el5.i386.rpm??

cluster-glue-libs-1.0.6-1.6.el5.i386.rpm??

resource-agents-1.0.4-1.1.el5.i386.rpm??

corosync-1.2.7-1.1.el5.i386.rpm???????????pacemaker-1.1.5-1.1.el5.i386.rpm??

corosynclib-1.2.7-1.1.el5.i386.rpm????pacemaker-cts-1.1.5-1.1.el5.i386.rpm??

heartbeat-3.0.3-2.3.el5.i386.rpm??????pacemaker-libs-1.1.5-1.1.el5.i386.rpm??

heartbeat-libs-3.0.3-2.3.el5.i386.rpm??

#yum?-y?--nogpgcheck?localinstall?*.rpm??

#?cd?/etc/corosync???

???#?cp?corosync.conf.example?corosync.conf???

???#?vim?corosync.conf??添加如下內(nèi)容???

????service?{???

ver:??0???

name:?pacemaker???

#?use_mgmtd:?yes???

?????}???

????aisexec?{???

user:???root???

group:??root???

???????}???

?????并設(shè)定此配置文件中?bindnetaddr后面的IP地址為你的網(wǎng)卡所在網(wǎng)絡(luò)的網(wǎng)絡(luò)地址???

?????我們這里設(shè)定為?bindnetaddr:172.16.0.0???

????????to_logfile:?yes?????

????????to_syslog:?no??????//關(guān)閉系統(tǒng)日志文件???

???????logfile:?/var/log/cluster/corosync.log???

???????secauth:?on?????????//啟用認證???

#?corosync-keygen????????//生成節(jié)點間的密鑰文件???

#?scp?-p?corosync?authkey??node2:/etc/corosync/???//復制文件到Director2上???

#?mkdir?/var/log/cluster??????????????????????????//創(chuàng)建日志所用到的目錄???

#?ssh?node2??'mkdir?/var/log/cluster'???

配置集群的工作屬性

修改忽略quorum不能滿足的集群狀態(tài)檢查：?

#?crm?configure?property?no-quorum-policy=ignore?

禁用stonith?

#?crm?configure?property?stonith-enabled=false?

添加資源

#crm?

crm(live)#configure?

primitive?mynfs?ocf:heartbeat:Filesystem?\?

????params?device="172.16.26.1:/sharedata"?\

directory="/mydata/data"?fstype="nfs"?\?

????op?start?interval="0"?timeout="60s"?\?

????op?stop?interval="0"?timeout="60s"?

primitive?mysqld?lsb:mysqld?

primitive?vip?ocf:heartbeat:IPaddr?\?

????params?ip="172.16.200.1"?

colocation?mysqd_and_mynfs_vip?inf:?mysqld?mynfs?vip?

order?mysqld_after_mynfs?inf:?mynfs?mysqld:start?

order?mysqld_after_vip?inf:?vip?mysqld?

使用crm_mon -1 查看，結(jié)果如下圖所示

然后查看node2節(jié)點的端口如下圖，證明資源添加生效

在瀏覽器里輸入VIP 查看結(jié)果如下圖所示

現(xiàn)在模擬node2出現(xiàn)了故障，則所有的資源都會轉(zhuǎn)移到節(jié)點node1上

#crm?node?standby? //讓節(jié)點二變成從節(jié)點

轉(zhuǎn)載于:https://blog.51cto.com/sxhxt/960606

總結(jié)

以上是生活随笔為你收集整理的基于corosync和NFS服务器实现LNMP的高可用的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。