Apache-2.2

apache Proxy 4 秒連接延遲

  • June 3, 2021

我有一個大數據網站（wordpress 二次開發）一個域 www.example.com。我已將其儲存到 3 個伺服器中。

In DNS setteing 
IP address (IN A / AAAA) 46.192.22.01
IP address (IN A / AAAA) 46.192.22.02
IP address (IN A / AAAA) 46.192.22.03
  • server1 46.192.22.01 /var/www/html -> /music & /video
  • server2 46.192.22.02 /var/www/html -> /article & /photo
  • server3 46.192.22.03 /var/www/html -> /products & /showroom

httpd.conf 文件：

Timeout 45
KeepAlive Off
MaxKeepAliveRequests 256
KeepAliveTimeout 3
<IfModule prefork.c>
StartServers       8
MinSpareServers    5
MaxSpareServers   20
ServerLimit      192
MaxClients       192
MaxRequestsPerChild  2500
</IfModule>

LoadModule auth_basic_module modules/mod_auth_basic.so
#LoadModule auth_digest_module modules/mod_auth_digest.so
LoadModule authn_file_module modules/mod_authn_file.so
LoadModule authn_alias_module modules/mod_authn_alias.so
#LoadModule authn_anon_module modules/mod_authn_anon.so
LoadModule authn_dbm_module modules/mod_authn_dbm.so
LoadModule authn_default_module modules/mod_authn_default.so
LoadModule authz_host_module modules/mod_authz_host.so
LoadModule authz_user_module modules/mod_authz_user.so
#LoadModule authz_owner_module modules/mod_authz_owner.so
LoadModule authz_groupfile_module modules/mod_authz_groupfile.so
#LoadModule authz_dbm_module modules/mod_authz_dbm.so
LoadModule authz_default_module modules/mod_authz_default.so
#LoadModule ldap_module modules/mod_ldap.so
#LoadModule authnz_ldap_module modules/mod_authnz_ldap.so
LoadModule include_module modules/mod_include.so
LoadModule log_config_module modules/mod_log_config.so
#LoadModule logio_module modules/mod_logio.so
LoadModule env_module modules/mod_env.so
#LoadModule ext_filter_module modules/mod_ext_filter.so
#LoadModule mime_magic_module modules/mod_mime_magic.so
LoadModule expires_module modules/mod_expires.so
LoadModule deflate_module modules/mod_deflate.so
LoadModule headers_module modules/mod_headers.so
#LoadModule usertrack_module modules/mod_usertrack.so
LoadModule setenvif_module modules/mod_setenvif.so
LoadModule mime_module modules/mod_mime.so
#LoadModule dav_module modules/mod_dav.so
#LoadModule status_module modules/mod_status.so
LoadModule autoindex_module modules/mod_autoindex.so
#LoadModule info_module modules/mod_info.so
#LoadModule dav_fs_module modules/mod_dav_fs.so
LoadModule vhost_alias_module modules/mod_vhost_alias.so
LoadModule negotiation_module modules/mod_negotiation.so
LoadModule dir_module modules/mod_dir.so
LoadModule actions_module modules/mod_actions.so
#LoadModule speling_module modules/mod_speling.so
LoadModule userdir_module modules/mod_userdir.so
LoadModule alias_module modules/mod_alias.so
#LoadModule substitute_module modules/mod_substitute.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
LoadModule proxy_http_module modules/mod_proxy_http.so
#LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule cache_module modules/mod_cache.so
LoadModule suexec_module modules/mod_suexec.so
LoadModule disk_cache_module modules/mod_disk_cache.so
LoadModule cgi_module modules/mod_cgi.so
#LoadModule version_module modules/mod_version.so

ExpiresActive On
<FilesMatch "\.(jpg|jpeg)$">
ExpiresDefault "access plus 1 year"
</FilesMatch>
<FilesMatch "\.(css|png|js|gif)$">
ExpiresDefault "access plus 1 month"
</FilesMatch>

<ifmodule mod_deflate.c>
DeflateCompressionLevel 6
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/javascript
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/atom_xml
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/x-httpd-php
</ifmodule>

伺服器 1

ServerName www.example.com:80
<VirtualHost *:80>
   ServerName www.example.com
   ServerAlias www.example.com
   DocumentRoot /var/www/html
   <directory "/var/www/html">
       Options Indexes FollowSymLinks
       AllowOverride all
       Order Deny,Allow
       Deny from all
       Allow from all
   </directory>
   <Proxy *>
       Order deny,allow
       Allow from all
   </Proxy>
   ProxyRequests Off
   ProxyPass /article http://46.192.22.02/article retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /article http://46.192.22.02/article
   ProxyPass /photo http://46.192.22.02/photo retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /photo http://46.192.22.02/photo
   ProxyPass /products http://46.192.22.03/products retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /products http://46.192.22.03/products
   ProxyPass /showroom http://46.192.22.03/showroom retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /showroom http://46.192.22.03/showroom
</VirtualHost>

伺服器2

ServerName www.example.com:80
<VirtualHost *:80>
   ServerName www.example.com
   ServerAlias www.example.com
   DocumentRoot /var/www/html
   <directory "/var/www/html">
       Options Indexes FollowSymLinks
       AllowOverride all
       Order Deny,Allow
       Deny from all
       Allow from all
   </directory>
   <Proxy *>
       Order deny,allow
       Allow from all
   </Proxy>
   ProxyRequests Off
   ProxyPass /music http://46.192.22.01/music retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /music http://46.192.22.01/music
   ProxyPass /video http://46.192.22.01/video retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /video http://46.192.22.01/video
   ProxyPass /products http://46.192.22.03/products retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /products http://46.192.22.03/products
   ProxyPass /showroom http://46.192.22.03/showroom retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /showroom http://46.192.22.03/showroom
</VirtualHost>

伺服器3

ServerName www.example.com:80
<VirtualHost *:80>
   ServerName www.example.com
   ServerAlias www.example.com
   DocumentRoot /var/www/html
   <directory "/var/www/html">
       Options Indexes FollowSymLinks
       AllowOverride all
       Order Deny,Allow
       Deny from all
       Allow from all
   </directory>
   <Proxy *>
       Order deny,allow
       Allow from all
   </Proxy>
   ProxyRequests Off
   ProxyPass /music http://46.192.22.01/music retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /music http://46.192.22.01/music
   ProxyPass /video http://46.192.22.01/video retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /video http://46.192.22.01/video
   ProxyPass /products http://46.192.22.03/products retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /products http://46.192.22.03/products
   ProxyPass /showroom http://46.192.22.03/showroom retry=1 acquire=3000 timeout=600 Keepalive=On
   ProxyPassReverse /showroom http://46.192.22.03/showroom
</VirtualHost>

所有的 /etc/hosts 都是

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

然後 .htaccess 文件

伺服器 1

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

RewriteRule ^music/track/(\d+)?$ music/track.php?number=$1
RewriteRule ^video/introduce/(\d+)?$ video/introduce.php?number=$1

RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

伺服器 2

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

RewriteRule ^article/introduce/(\d+)?$ article/introduce.php?number=$1
RewriteRule ^photo/products/(\d+)?$ photo/products.php?number=$1

RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

伺服器 3

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

RewriteRule ^products/smartphone/(\d+)?$ products/smartphone.php?number=$1
RewriteRule ^showroom/smartphone/(\d+)?$ showroom/smartphone.php?number=$1

RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

但是我打開http://www.example.com/products/smartphone/102034的時候很慢（3-5秒延遲），但是http://46.192.22.03/products/smartphone/102034很快（0.2秒左右）

tail -50 /var/log/messages返回日誌如

Nov 18 11:46:20 dhclient[857]: DHCPACK from 46.192.22.01 (xid=0x6caa5cd9)
Nov 18 11:46:21 dhclient[857]: bound to 46.192.22.02 -- renewal in 1481 seconds.

我不擅長伺服器部分技術。任何教授都可以幫助我找出並解決導致 DNS 非常慢的問題所在嗎？謝謝。

更新 1 (2014/11/23)

在 2 天的Google搜尋中，仍然沒有找到答案。每個頁面載入需要大約 4 秒的連接，這是在 chrome 控制台中查看的。如果鍵入 ip 而不是 domainn，則只需 0.2-0.4 秒連接。我在所有 3 個伺服器中都禁用了我的 ipv6，我在…retry=1 acquire=3000 timeout=600 Keepalive=On之後添加了ProxyPass

#dig example.com

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.30.rc1.el6 <<>> example.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63728
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;example.com.               IN      A

;; ANSWER SECTION:
example.com.        7199    IN      A       46.192.22.01
example.com.        7199    IN      A       46.192.22.02
example.com.        7199    IN      A       46.192.22.03

;; Query time: 121 msec
;; SERVER: 46.61.167.22#53(46.61.167.22)
;; WHEN: Sun Nov 23 20:51:03 2014
;; MSG SIZE  rcvd: 81

我懷疑反向代理真的是我需要的嗎？Hane 我發現連接伺服器的方法錯誤？

確實，我有 1 個站點的大數據，現在我將它分成 3 個 centos6.6 64 位伺服器（具有 3 個 ips）。每台伺服器都有唯一的文件夾

  • server1 46.192.22.01 /var/www/html -> /music & /video
  • server2 46.192.22.02 /var/www/html -> /article & /photo
  • server3 46.192.22.03 /var/www/html -> /products & /showroom

所以它不是集群平衡或代理平衡，而是如何設置（或安裝其他軟體）讓網際網路知道是否某種類型的“ http://www.example.com/music ”它會映射到伺服器1；某種類型的“ http://www.example.com/products ”它會映射到伺服器 3…對不起我的母語不是英語，所以我一直沒有找到正確的方法，直到今天，只有反向代理可以滿足我的要求。

對不起，我只有一些php，mysql技能，一點apache centos技能，需要詳細的解決方案。非常感謝。

更新 2 (2014/11/24)

又是一天的工作。似乎不是 DNS 查找問題。這是使用域時的一些螢幕截圖 帶域的 chrome cosole

然後與ip相同的頁面

帶 ip 的鍍鉻 cosole

避免瀏覽器記憶體影響。我已經清理了所有瀏覽器記憶體，然後嘗試先載入 ip 然後載入域。最大的區別在於“停滯”和“初始連接”。

我使用top命令監控記憶體和cpu使用情況，3台伺服器在速度慢時看起來正常。

s1

top - 18:21:57 up 21:44,  1 user,  load average: 1.08, 1.28, 1.10
Tasks: 108 total,   2 running, 106 sleeping,   0 stopped,   0 zombie
Cpu(s):  7.3%us,  2.4%sy,  0.0%ni, 77.8%id, 12.2%wa,  0.0%hi,  0.0%si,  0.2%st
Mem:   1922200k total,  1847432k used,    74768k free,     2224k buffers
Swap:  1048572k total,    81224k used,   967348k free,    84816k cached

s2

top - 18:31:24 up 21:55,  1 user,  load average: 0.15, 0.09, 0.02
Tasks: 119 total,   1 running, 118 sleeping,   0 stopped,   0 zombie
Cpu(s):  3.0%us,  1.0%sy,  0.0%ni, 95.8%id,  0.0%wa,  0.0%hi,  0.2%si,  0.0%st
Mem:   1922200k total,  1669328k used,   252872k free,    25652k buffers
Swap:  1048572k total,    69256k used,   979316k free,   458528k cached

s3

top - 18:21:21 up 1 day,  5:57,  1 user,  load average: 1.03, 0.88, 0.90
Tasks: 105 total,   2 running, 103 sleeping,   0 stopped,   0 zombie
Cpu(s): 25.7%us, 20.0%sy,  0.0%ni, 53.9%id,  0.0%wa,  0.0%hi,  0.2%si,  0.2%st
Mem:   1922200k total,  1758088k used,   164112k free,    58712k buffers
Swap:  1048572k total,      128k used,  1048444k free,   226396k cached

請查看平均負載。2 台伺服器超過了 1 的值。

確實在DNS中，我將伺服器1設置在第一個A地址位置，但是為什麼伺服器2成為主伺服器？

如果您在通過主機名和通過 IP 連接到站點時得到不同的結果，那麼問題似乎仍然與 DNS 有關。

嘗試將所有三台機器都添加到所有這些機器上的 /etc/hosts 中，即

46.192.22.01 server1
46.192.22.02 server2
46.192.22.03 server3

作為旁注，您的 DHCP 租用時間似乎很短，大約為 1500 秒。典型的 DHCP 租約持續一天或更長時間。如果 IP 是靜態的（似乎是這種情況），您還可以考慮將它們從 DHCP 池中刪除，並使這三台機器上的 IP 配置靜態。

引用自：https://serverfault.com/questions/645594

相關問答

Apache-2.2

使用 apache 的 pagespeed 反向代理伺服器的推薦配置

  • December 23, 2015
檢視問答
Apache-2.2

在 centos 中載入 apache 的 mod_proxy 和 mod_proxy_http 模組

  • June 23, 2014
檢視問答
Apache-2.2

嘗試在 centos 5.5 上安裝清漆時出現錯誤消息

  • May 4, 2012
檢視問答
Linux

HAProxy path_beg 錯誤 - 503 服務不可用

  • April 1, 2022
檢視問答
Apache-2.2

通過 mod_proxy_ajp 的 Apache 反向代理不將請求路由到 Tomcat

  • February 18, 2022
檢視問答
Apache-2.2

如何讓 SELinux 允許 Apache 和 Samba 在同一個文件夾中？

  • February 9, 2022
檢視問答