[squid-users] Squid Accellerator with ethernal cache for fault tollerance

From: Daniele Segato <daniele.segato_at_gmail.com>
Date: Fri, 19 Apr 2013 10:00:15 +0200


my need is to have Squid caching request to my server like this:
* do NOT bother the server more then once per minute to check if an
update is available
* if the server return a 500, go into timeout or something like this
during an update keep sending the cached resource to the user

Ideally I would like to be able to turn off the server for maintenance
while the Squid frontend keep returning request.

I've been trying to achieve this for a while now without success.

Is this possible?
Can you address me in the right direction?


This is my configuration file (included in the main squid.conf):
Which currently cache updating every minute but start givin error after
that minute if the server is took down.

# http://wiki.squid-cache.org/SquidFaq/ReverseProxy
# http://www.visolve.com/squid/whitepapers/reverseproxy.php

http_port localhost:280 accel ignore-cc defaultsite=localhost
cache_peer localhost parent 8080 0 no-query originserver no-digest
default name=myAccel

refresh_all_ims off

# IP address of web server
# Port of web server
#httpd_accel_port 8080
# Forward uncached requests to single host
#httpd_accel_single_host on
#httpd_accel_with_proxy on
#httpd_accel_uses_host_header off

acl Safe_ports port 280
http_access deny !Safe_ports

acl our_sites dstdomain localhost mobc3.local
http_access allow our_sites
cache_peer_access myAccel allow our_sites
cache_peer_access myAccel deny all

#http_access allow all
#cache_peer_access myAccel allow all

#refresh_pattern /alfresco/service/catalog 0 20% 4320 reload-into-ims
ignore-no-cache refresh-ims ignore-reload
#refresh_pattern /alfresco/service/stream 0 20% 4320 reload-into-ims
ignore-no-cache refresh-ims ignore-reload

# do not cache anything but what I tell you
#refresh_pattern . 0 20% 0
#hierarchy_stoplist .
#never_direct /alfresco/service/catalog
#never_direct /alfresco/service/stream

# cache services
refresh_pattern /alfresco/service/catalog 0 20% 4320
refresh_pattern /alfresco/service/stream 0 20% 4320
refresh_pattern /alfresco/service/news 0 20% 4320
# do not cache everything else
refresh_pattern . 0 20% 0

# see http://wiki.squid-cache.org/KnowledgeBase/DebugSections
#debug_options ALL,3
debug_options 22,3
#debug_options 22,5

Daniele Segato
Received on Fri Apr 19 2013 - 08:00:29 MDT

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