Plone mit vorgeschaltetem Apache und Squid

Ronny Wilde <[email protected]>
Newsgroups gmane.comp.web.zope.german
Organization Privat
Message-ID <[email protected]> 
Folgendes Problem: beim Editieren der Webseiten wird nie der aktuelle Inhalt 
zurückgegeben sondern nur der Cache-Inhalt. Ständig muß mit F5 aktualisiert 
werden. 

Aufruf der Seite im Browser: http://www.example1.org:81.
Setup
squid:81 ---> apache-vhost:84 ----> plone:8080

/etc/hosts
127.0.0.1     www.example1.org

Apache vhost-config
Listen 127.0.0.1:84                                                      
<VirtualHost www.example1.org:84>                                        
  ServerName www.example1.org                                     
  <IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteLog "/var/log/apache2/rewrite_log"
    RewriteLogLevel 9
    # serving icons from apache 2 server
    RewriteRule ^/icons/ - [L]
    RewriteRule ^/(.*) \
    http://localhost:8080/VirtualHostBase/http/%{SERVER_NAME}:81/Plone/VirtualHostRoot/$1 
[L,P]
  </IfModule>
</VirtualHost>

Squid config:
#                                                                  
# Recommended minimum configuration:                               
#                                                                  
acl manager proto cache_object                                     
acl localhost src 127.0.0.1/32 ::1                                 
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1                    

# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed                                            
acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl localnet src fc00::/7 # RFC 4193 local private network range   
acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines

acl SSL_ports port 443
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp 
acl Safe_ports port 443 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais 
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt                
acl Safe_ports port 488 # gss-http                 
acl Safe_ports port 591 # filemaker                
acl Safe_ports port 777 # multiling http           
acl CONNECT method CONNECT                         
acl our_sites dstdomain www.example1.org           
acl PURGE method GET                               

#
# Recommended minimum Access Permission configuration:
#                                                     
# Only allow cachemgr access from localhost           
http_access allow manager localhost                   
http_access deny manager                              

# Deny requests to certain unsafe ports
http_access deny !Safe_ports           

# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports          

# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only       
# one who can access services on "localhost" is a local user            
#http_access deny to_localhost                                          

#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
http_access allow our_sites
cache_peer 127.0.0.1 parent 84 0 no-query originserver name=myAccel
cache_peer_access myAccel allow all                                
#cache_peer_access myAccel allow our_sites                         
#cache_peer_access myAccel deny all

# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed
http_access allow localnet
http_access allow localhost

# And finally deny all other access to this proxy
http_access allow PURGE
http_access deny all

# Squid normally listens to port 3128
#http_port 3128
http_port 81 defaultsite=www.example1.org
#cache_peer 127.0.0.1 parent 84 0 no-query originserver name=myAccel

# We recommend you to use at least the following line.
hierarchy_stoplist cgi-bin ?

# Uncomment and adjust the following to add a disk cache directory.
cache_dir ufs /usr/local/squid/var/cache 128 16 256

# Leave coredumps in the first cache dir
coredump_dir /usr/local/squid/var/cache

# Add any of your own refresh_pattern entries above these.
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern -i (/cgi-bin/|\?) 0     0%      0
refresh_pattern .               0       20%     4320
cache_effective_user squid
cache_effective_group nogroup
cache_mem 50 MB
#always_direct allow all
cache_store_log /usr/local/squid/var/logs/cache_store.log


Performancetests:

ab2 -n 1000 -c 150 http://www.example1.org:81/test
This is ApacheBench, Version 2.3 <$Revision: 655654 $>                           
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/         
Licensed to The Apache Software Foundation, http://www.apache.org/               

Benchmarking www.example1.org (be patient)
Finished 1000 requests

Server Software:        Zope/(2.12.16,
Server Hostname:        www.example1.org
Server Port:            81

Document Path:          /test
Document Length:        16926 bytes

Concurrency Level:      150
Time taken for tests:   178.003 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Total transferred:      17246000 bytes
HTML transferred:       16926000 bytes
Requests per second:    5.62 [#/sec] (mean)
Time per request:       26700.494 [ms] (mean)
Time per request:       178.003 [ms] (mean, across all concurrent requests)
Transfer rate:          94.62 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0   10  24.9      0      78
Processing:   432 24927 6572.6  26179   35647
Waiting:      421 24927 6572.7  26179   35647
Total:        484 24938 6562.3  26179   35705

Auszug aus squid access.log

1299866618.347  23717 127.0.0.1 TCP_MISS/200 17246 GET 
http://www.example1.org/test - FIRST_UP_PARENT/myAccel text/html
1299866618.616  23702 127.0.0.1 TCP_MISS/200 17246 GET 
http://www.example1.org/test - FIRST_UP_PARENT/myAccel text/html
1299866618.662  23731 127.0.0.1 TCP_MISS/200 17246 GET 
http://www.example1.org/test - FIRST_UP_PARENT/myAccel text/html
1299866618.916  23697 127.0.0.1 TCP_MISS/200 17246 GET 
http://www.example1.org/test - FIRST_UP_PARENT/myAccel text/html
1299866618.953  23723 127.0.0.1 TCP_MISS/200 17246 GET 
http://www.example1.org/test - FIRST_UP_PARENT/myAccel text/html
1299866619.208  23686 127.0.0.1 TCP_MISS/200 17246 GET 
http://www.example1.org/test - FIRST_UP_PARENT/myAccel text/html
1299866619.248  23703 127.0.0.1 TCP_MISS/200 17246 GET 
http://www.example1.org/test - FIRST_UP_PARENT/myAccel text/html
1299866619.374  23552 127.0.0.1 TCP_MISS/200 17246 GET 
http://www.example1.org/test - FIRST_UP_PARENT/myAccel text/html

Ursache für TCP MISS ist der HEADER von Plone, Expiration Date
wget -S --delete-after http://www.example1.org:81/Plone/test
--2011-03-11 18:54:41--  http://www.example1.org:81/Plone/test
Auflösen des Hostnamen »www.example1.org«.... 127.0.0.1
Verbindungsaufbau zu www.example1.org|127.0.0.1|:81... verbunden.
HTTP Anforderung gesendet, warte auf Antwort...
  HTTP/1.0 200 OK
  Date: Fri, 11 Mar 2011 17:54:41 GMT
  Server: Zope/(2.12.16, python 2.6.6, linux2) ZServer/1.1
  Content-Length: 16931
  Expires: Sat, 01 Jan 2000 00:00:00 GMT
  Content-Type: text/html;charset=utf-8
  Content-Language: de
  X-Cache: MISS from notebook
  Via: 1.0 notebook (squid/3.1.11)
  Connection: keep-alive
Länge: 16931 (17K) [text/html]
In »test« speichern.

100%[================================================================================================>] 
16.931      --.-K/s   in 0s

2011-03-11 18:54:41 (177 MB/s) - »test« gespeichert [16931/16931]

Nach Einrichtung in Plone von caching_policy_manager

wget -S --delete-after http://www.example1.org:81/Plone/test
--2011-03-11 18:57:27--  http://www.example1.org:81/Plone/test
Auflösen des Hostnamen »www.example1.org«.... 127.0.0.1
Verbindungsaufbau zu www.example1.org|127.0.0.1|:81... verbunden.
HTTP Anforderung gesendet, warte auf Antwort...
  HTTP/1.0 200 OK
  Date: Fri, 11 Mar 2011 17:57:27 GMT
  Server: Zope/(2.12.16, python 2.6.6, linux2) ZServer/1.1
  Content-Length: 16931
  Content-Language: de
  X-Cache-Headers-Set-By: CachingPolicyManager: /Plone/caching_policy_manager
  Expires: Fri, 11 Mar 2011 18:57:27 GMT
  Last-Modified: Fri, 11 Mar 2011 16:04:30 GMT
  Cache-Control: max-age=3600, s-maxage=7200, must-revalidate, proxy-
revalidate
  Content-Type: text/html;charset=utf-8
  X-Cache: MISS from notebook
  Via: 1.0 notebook (squid/3.1.11)
  Connection: keep-alive
Länge: 16931 (17K) [text/html]
In »test« speichern.

100%[================================================================================================>] 
16.931      --.-K/s   in 0s

2011-03-11 18:57:27 (139 MB/s) - »test« gespeichert [16931/16931]

Entferne »test«.

ab2 -n 1000 -c 150 http://www.example1.org:81/test
This is ApacheBench, Version 2.3 <$Revision: 655654 $>                           
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/         
Licensed to The Apache Software Foundation, http://www.apache.org/               

Benchmarking www.example1.org (be patient)
Finished 1000 requests                    

Server Software:        Zope/(2.12.16,
Server Hostname:        www.example1.org
Server Port:            81              

Document Path:          /test
Document Length:        31864 bytes

Concurrency Level:      150
Time taken for tests:   1.225 seconds
Complete requests:      1000         
Failed requests:        0            
Write errors:           0            
Total transferred:      32396000 bytes
HTML transferred:       31864000 bytes
Requests per second:    816.47 [#/sec] (mean)
Time per request:       183.718 [ms] (mean)  
Time per request:       1.225 [ms] (mean, across all concurrent requests)
Transfer rate:          25830.41 [Kbytes/sec] received                   

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    4   9.1      0      39
Processing:    31  171  38.5    169     765
Waiting:       15   75  33.6     81     649
Total:         58  175  35.1    169     765

Auszug aus dem squid access.log

1299867000.896     58 127.0.0.1 TCP_MEM_HIT/200 17456 GET 
http://www.example1.org/test - NONE/- text/html
1299867000.896     58 127.0.0.1 TCP_MEM_HIT/200 17456 GET 
http://www.example1.org/test - NONE/- text/html
1299867000.896     58 127.0.0.1 TCP_MEM_HIT/200 17456 GET 
http://www.example1.org/test - NONE/- text/html
1299867000.896     58 127.0.0.1 TCP_MEM_HIT/200 17456 GET 
http://www.example1.org/test - NONE/- text/html
1299867000.896     58 127.0.0.1 TCP_MEM_HIT/200 17456 GET 
http://www.example1.org/test - NONE/- text/html
1299867000.896     58 127.0.0.1 TCP_MEM_HIT/200 17456 GET 
http://www.example1.org/test - NONE/- text/html
1299867000.896     58 127.0.0.1 TCP_MEM_HIT/200 17456 GET 
http://www.example1.org/test - NONE/- text/html
1299867000.896     58 127.0.0.1 TCP_MEM_HIT/200 17456 GET 
http://www.example1.org/test - NONE/- text/html
1299867000.896     58 127.0.0.1 TCP_MEM_HIT/200 17456 GET 
http://www.example1.org/test - NONE/- text/html


Jetzt klappt es auch mit der Performance und dem cachen.

Requests per second:    816.47 [#/sec] (mean) gegenüber
Requests per second:    5.62 [#/sec] (mean)
TCP_MEM_HIT/200 gegenüber TCP_MISS/200

Nun besteht aber obiges Problem. Was nun?





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