lnmap實戰之負載均衡架構(無高可用)

srayban ? ? Linux干貨

lnmap實戰之負載均衡架構(無高可用)

架構圖如下:

image

此次實戰軟件,全部yum安裝

1.準備好機器,同步好時間

192.168.42.150 node1 [負載均衡器]
192.168.42.152 node3 [web2]
192.168.42.153 node4 [web1]
192.168.42.151 node2 [memcached session存儲]
192.168.42.154 node5 [nfs 共享存儲]
192.168.42.155 node6 [mariadb]

我們這次實戰從后面的節點開始吧

2.在node6節點上安裝mariadb

安裝mariadb

yum install mariadb-server -y

更改基本配置

vim /etc/my.cnf.d/server.cnf
[mysqld] 
skip_name_resolve=1
log-bin=mysql-bin
innodb_file_per_table = 1

啟動mariadb

systemctl start mariadb

更改密碼

mysqladmin -uroot -p password "root"

登錄mysql

mysql -u root -p

添加外部訪問賬號

MariaDB [(none)]> grant all privileges on *.* to 'magedu'@'192.168.42.%' identified by '123456';
MariaDB [(none)]> flush privileges;

登錄測試一下

mysql -u magedu -h 192.168.42.155 -p
Enter password: 
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 7
Server version: 5.5.52-MariaDB MariaDB Server
Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]>

3.node5 安裝nfs

安裝nfs

yum install nfs-utils rpcbind -y

添加用戶(用戶id,組id來自node3,node4的apache用戶,我們需要統一)

[root@node5 ~] groupadd -g 48 apache
[root@node5 ~] useradd -r -g 48 -u 48  apache
[root@node5 ~] id apache
uid=48(apache) gid=48(apache) groups=48(apache)

創建共享目錄

mkdir -p /data
chown  -R apache.apache /data

配置共享目錄

vim  /etc/exports
/data   192.168.42.0/24(rw,sync,all_squash,anonuid=48,anongid=48)

啟動rpcbind,nfs

systemctl start rpcbind
systemctl start nfs

設置開機啟動 因為需要先啟動rpcbind,然后再啟動nfs,因此我們把開機啟動放入rc.local里

chmod +x  /etc/rc.local/rc.local
vim /etc/rc.d/rc.local
systemctl start rpcbind
systemctl start nfs

查看此時的端口

ss -tnl
State      Recv-Q Send-Q   Local Address:Port        Peer Address:Port              
LISTEN     0      128                  *:9743                   *:*                  
LISTEN     0      128                  *:111                    *:*                  
LISTEN     0      128                  *:20048                  *:*                  
LISTEN     0      128                  *:22                     *:*                  
LISTEN     0      100          127.0.0.1:25                     *:*                  
LISTEN     0      64                   *:2049                   *:*                  
LISTEN     0      64                   *:28518                  *:*                  
LISTEN     0      64                  :::8812                  :::*                  
LISTEN     0      128                 :::61836                 :::*                  
LISTEN     0      128                 :::111                   :::*                  
LISTEN     0      128                 :::20048                 :::*                  
LISTEN     0      128                 :::22                    :::*                  
LISTEN     0      100                ::1:25                    :::*                  
LISTEN     0      64                  :::2049                  :::*

查看掛載的目錄

showmount -e 127.0.0.1
Export list for 127.0.0.1:
/application/data 168.92.168.42.0/24

去node4,node3掛載試一下

yum install nfs-utils rpcbind httpd -y
id apache
uid=48(apache) gid=48(apache) groups=48(apache)
mkdir /test
chown -R apache.apache /test
mount -t  nfs  192.168.42.154:/data  /test

4.node4,node3在測試nfs的時候已經安裝過httpd了 所以我們只需要在node4,node3節點上安裝php就行了

yum install php php-mysql -y



此步驟只適合2.2版本,yum安裝的2.4版本/etc/httpd/conf.d/php.conf已經幫我們添加了
配置apache虛擬主機,并讓apache支持php
vim /etc/httpd/conf/httpd.conf
找到對應的位置,添加
ServerName localhost:80
找到對應的位置,添加
LoadModule php5_module modules/libphp5.so 
找到對應的位置,添加
AddType application/x-httpd-php .php 
找到對應的位置,添加
<IfModule dir_module>
    DirectoryIndex index.php index.html
</IfModule>

測試php是否能順利運行

vim  /var/www/html/index.php
<?php

phpinfo();

?>

測試是否能順利連接mysql

<?php
  $conn = mysql_connect("192.168.42.155","magedu","123456");
  if($conn){
     echo "Connection success";
  }else{
     echo mysql_error(); 
  }
?>

5.在node2上安裝memcached

yum install libevent libevent-devle memcached -y
systemctl enable memcached
systemctl start memcached
[root@node2 ~] ss -tnl
State      Recv-Q Send-Q    Local Address:Port   Peer Address:Port              
LISTEN     0      128                   *:22                *:*                  
LISTEN     0      100           127.0.0.1:25                *:*                  
LISTEN     0      1024                  *:11211             *:*                  
LISTEN     0      128                  :::22               :::*                  
LISTEN     0      100                 ::1:25               :::*                  
LISTEN     0      1024                 :::11211            :::*

6.在node4,node3上操作,將php的session存儲設置為memcached

(1)安裝memcached擴展

yum install php-pecl-memcache* -y

(2)設置php的session存儲

vim /etc/httpd/conf.d/php.conf
php_value session.save_handler "memcache"
php_value session.save_path    "tcp://192.168.42.151:11211"

(3)用例子測試一下：

代碼如下:

vim /var/www/html/session.php

<?php  
    session_start();  
    if (!isset($_SESSION['TEST'])) {  
        $_SESSION['TEST'] = "set web1 ok";  
    }  

    echo  $_SESSION['TEST'];  
?>

(4).用另一個文件查看一下：

代碼如下:

vim /var/www/html/get.php
<?php
session_start();
echo $_SESSION['TEST'];
?>

7.在node1上安裝nginx 負載均衡器

yum install nginx -y

vim /etc/nginx/conf.d/test.conf
server {
  listen 80;
  server_name www.test.com;
  location / {
        proxy_pass http://sshsrvs;
        add_header X-Via  $server_addr;
        add_header X-Accel $server_name;
  }
}

負載均衡配置

vim /etc/nginx/nginx.conf
upstream sshsrvs {
    server 192.168.42.152:80;
    server 192.168.42.153:80;
    least_conn;
}

8.在node4,node3添加虛擬主機測試
node3:

創建應用目錄
mkdir -p /application/discuz
chown -R apache.apache /application/discuz
測試頁
echo "this is discuz_1 test page." > /application/discuz/index.html
定義discuz虛擬主機
vim /etc/httpd/conf.d/discuz.conf

<VirtualHost *:80>
        ServerName test.discuz.com
        DocumentRoot "/application/discuz"
        <Directory "/application/discuz">
                Options None
                AllowOverride None
                Require all granted
        </Directory>
        CustomLog "logs/iounix_access_log" combined
</VirtualHost>

域名解析
vim /etc/hosts
192.168.42.152 test.discuz.com

重啟apache
systemctl restart httpd

node4:

創建應用目錄
mkdir -p /application/discuz
chown -R apache.apache /application/discuz
測試頁
echo "this is discuz_4 test page." > /application/discuz/index.html

定義discuz虛擬主機
vim /etc/httpd/conf.d/discuz.conf

<VirtualHost *:80>
        ServerName test.discuz.com
        DocumentRoot "/application/discuz"
        <Directory "/application/discuz">
                Options None
                AllowOverride None
                Require all granted
        </Directory>
        CustomLog "logs/iounix_access_log" combined
</VirtualHost>

域名解析
vim /etc/hosts
192.168.42.153 test.discuz.com

重啟apache
systemctl restart httpd

9.在負載均衡上添加域名解析并測試

vim /etc/hosts
192.168.42.150  test.discuz.com

添加discuz虛擬主機

vim /etc/nginx/conf.d/discuz.conf

server {
  listen 80;
  server_name test.discuz.com;
  location / {
        proxy_pass http://sshsrvs;
        proxy_set_header Host  $host;
        proxy_set_header X-Forwarded-For  $remote_addr;
        add_header X-Via  $server_addr;
        add_header X-Accel $server_name;
  }
}

測試test.discuz.com

[root@node1 conf.d] for i in {1..10};do curl test.discuz.com ; done
this is discuz_1 test page.
this is discuz_4 test page.
this is discuz_1 test page.
this is discuz_4 test page.
this is discuz_1 test page.
this is discuz_4 test page.
this is discuz_1 test page.
this is discuz_4 test page.
this is discuz_1 test page.
this is discuz_4 test page.

負載均衡效果已經出來了

10.安裝discuz測試
為了避免出錯發生,我們需要把負載均衡,卸掉一個,留一個,因為我們是從物理機的瀏覽器安裝discuz
在node1上注釋掉一個

vim /etc/nginx/nginx.conf
upstream sshsrvs {
    server 192.168.42.152:80;
    server 192.168.42.153:80;
    least_conn;
}

重啟nginx

systemctl restart nginx

測試一下

[root@node1 nginx] for i in {1..10};do curl test.discuz.com ; done
this is discuz_1 test page.
this is discuz_1 test page.
this is discuz_1 test page.
this is discuz_1 test page.
this is discuz_1 test page.
this is discuz_1 test page.
this is discuz_1 test page.
this is discuz_1 test page.
this is discuz_1 test page.
this is discuz_1 test page.

進入node3的/application/discuz目錄下載discuz

wget -c http://download.comsenz.com/DiscuzX/3.3/Discuz_X3.3_SC_UTF8.zip
yum install unzip -y
unzip Discuz_X3.3_SC_UTF8.zip
ls
[root@node3 discuz] ls
Discuz_X3.3_SC_UTF8.zip  index.html  readme  upload  utility

刪掉之前測試的index.html

rm -f index.html

我們可以看到discuz的目錄層次有點深,因此我們需要把網站的根目錄指向upload

vim /etc/httpd/conf.d/discuz.conf
DocumentRoot "/application/discuz/upload"

重啟apache

systemctl restart httpd

因為discuz需要檢查目錄權限,因此我們

chown -R apache.apache /application/discuz

添加物理機hosts域名解析

192.168.42.150 test.discuz.com

瀏覽器輸入 test.discuz.com

可以看到以下效果:

image

按照提示操作即可完成discuz安裝

11.discuz安裝完成以后,我們需要把文件推送到node4節點上

cd /application
scp -rp discuz root@192.168.42.153:/application

推送完成以后

node4操作:

cd /application/discuz
rm -f index.html
chown -R apache.apache /application/discuz

更改虛擬主機discuz的根目錄為upload

vim /etc/httpd/conf.d/discuz.conf
DocumentRoot "/application/discuz/upload"

完成上述操作以后,還記得之前在node1上注釋的嗎,我們需要把它打開

vim /etc/nginx/nginx.conf
upstream sshsrvs {
    server 192.168.42.152:80;
    server 192.168.42.153:80;
    least_conn;
}

重啟nginx

12.在去瀏覽器中訪問,登錄后臺,操作等,一切正常

13.還有最后一個問題需要處理,discuz的數據目錄,共享存儲 在node5上操作:

mkdir -p  /data/discuz/

進入node3 把data推送過來

cd /application/discuz/upload
scp -rp uc_server root@192.168.42.154:/data/discuz/
scp -rp data root@192.168.42.154:/data/discuz/

在node5上操作:

vim /etc/exports
/data/discuz/data   192.168.42.0/24(rw,sync,all_squash,anonuid=48,anongid=48)
/data/discuz/uc_server   192.168.42.0/24(rw,sync,all_squash,anonuid=48,anongid=48)
exportfs -rv
chown -R  apache.apache /data

在node3上掛載并加入開機掛載

cd  /application/discuz/upload/data
rm -rf * 
umount /test
cd ../
mount -t nfs 192.168.42.154:/data/discuz/data  /application/discuz/upload/data
mount -t nfs 192.168.42.154:/data/discuz/uc_server  /application/discuz/upload/uc_server
chmod +x /etc/rc.d/rc.local
echo "mount -t nfs 192.168.42.154:/data/discuz/data  /application/discuz/upload/data" >>/etc/rc.d/rc.local
echo "mount -t nfs 192.168.42.154:/data/discuz/uc_server  /application/discuz/upload/uc_server" >>/etc/rc.d/rc.local

在node4做同樣的操作:

至此工作已經全部完成

原創文章，作者：srayban，如若轉載，請注明出處：http://www.www58058.com/78403

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