[squid-users] two sibling squids talking via ICP while caching a parent web server

Hello
We've gotten the single Squid server working with the one parent backend
caching nicely, now we've added a second Squid, and want it configured
the same, but also have it use the other Squid as a sibling, and
vice-versa. From what we can see this will get us what we want, but
it's not working. While I'll occasionally see a mention of the other
Squid server in the logs for each of them - for example, from the logs
on nldg-27:

/var/log/squid/store.log:1192652265.671 SWAPOUT 00 00000051
24BC0FD5CD9FAC9885F196E48A1F649E 200 1192652265 -1 1192653765
text/html 43325/43325 GET
http://nldg-28.domain.com/ISNet/environments/index.html
/var/log/squid/store.log:1192652299.555 SWAPOUT 00 00000052
4F361C5B13A2D088A38BA1B244469D48 200 1192652299 -1 1192653799
text/html 55205/55205 GET
http://nldg-28.domain.com/ISNet/forms_templates/index.html

It still never seems to get pages that we know one server has - and
instead always goes to the backend webserver, the parent to get it.
We've worked on this for days now (otherwise I wouldn't send it in) and
we're stumped. Going through the site, faq, book, everything. I assume
we're missing something very basic, but we've been unable to find it.
Here is our squid.conf, with our two Squid sibling servers being nldg-27
and nldg-28, and the backend webserver, the parent, being nsdgecmweb-18.

Thanks

P

##############
# SERVER #
##############
http_port 192.168.120.226:3128 vhost
visible_hostname nldg-28.domain.com
unique_hostname nldg-28.domain.com
client_persistent_connections on
server_persistent_connections on

##############
# PARENT #
##############
cache_peer nsdgecmweb-18.domain.com parent 80 0 no-query
no-netdb-exchange no-digest originserver login=PASS

##############
# SIBLING #
##############
cache_peer nldg-27.domain.com sibling 3128 3130 proxy-only
acl fromneighbor src 192.168.120.225
cache_peer_access nldg-27.domain.com deny fromneighbor
log_icp_queries on

##############
# ACCESS #
##############
acl all src all
acl static_content urlpath_regex -i \.(jpg|gif|png|css|js|axd)
http_access allow all
# allow for POST and strip off tailing query terms
acl METHODLIST method POST
cache deny METHODLIST
strip_query_terms off
# allow for localhost or 127.0.0.1 to control the purging of cache
acl PURGE method purge
acl localhost src localhost
http_access allow purge localhost
http_access deny purge
cache_effective_user squid
cache_effective_group squid
# added for sibling access
icp_access allow all

##############
# REFRESHING #
##############
# See
http://www.squid-cache.org/Versions/v2/2.6/cfgman/refresh_pattern.html
#refresh_pattern <regexp> <min> <percent> <max> <options>
# TESTING: Caching everything like crazy
#refresh_pattern ^http: 600000 100% 700000 override-expire
override-lastmod reload-into-ims ignore-reload ignor
e-no-cache ignore-private ignore-auth
refresh_pattern ^http: 600000 100% 700000 override-expire
override-lastmod reload-into-ims ignore-reload ignore
-no-cache ignore-private ignore-auth
# Overriding caching settings if nocache=true option is set
refresh_pattern nocache=true 0 0% 0
# Overriding caching settings if edit=yes option is set
refresh_pattern edit=yes 0 0% 0
# Cache images for 4-5 hours, regardless what the server says
refresh_pattern .jpg 14400 50% 18000 override-expire override-lastmod
reload-into-ims ignore-reload ignore-no-c
ache ignore-private ignore-auth
refresh_pattern .gif 14400 50% 18000 override-expire override-lastmod
reload-into-ims ignore-reload ignore-no-c
ache ignore-private ignore-auth
refresh_pattern .png 14400 50% 18000 override-expire override-lastmod
reload-into-ims ignore-reload ignore-no-c
ache ignore-private ignore-auth
# Cache CSS and JavaScript for 4-5 days as well
refresh_pattern .css 14400 50% 18000 override-expire override-lastmod
reload-into-ims ignore-reload ignore-no-c
ache ignore-private ignore-auth
refresh_pattern .js 14400 50% 18000 override-expire override-lastmod
reload-into-ims ignore-reload ignore-no-c
ache ignore-private ignore-auth

##############
# HEADERS #
##############
# Do not tell the world that we are running squid
httpd_suppress_version_string on
# Remove the Caching Control header on content deemed static
header_access Cache-Control deny static_content

##############
# LOGGING #
##############
emulate_httpd_log on
buffered_logs on

##############
# DEBUGGING #
##############
#debug_options ALL,1 33,2
 
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Received on Thu Oct 18 2007 - 07:34:01 MDT