[squid-users] multiple web servers - squid looks for images on wrong server.

Hi,
I have set up squid in reverse proxy (http-accelerator mode) on a machine
along with the web server. the web server listens on 127.0.0.1 while squid
listens on 192.168.124.41. There is another web server 192.168.124.40. Squid
has been configured with urlpath_regex to redirect any incoming requests
with "images" in the url to 192.168.124.40.

                                     |---> webserver1 (127.0.0.1)
squid (192.168.124.41) --- | |
                                     |---> webserver2 (192.168.124.40)

Now according to my config, pointing my browser to
192.168.124.41/images.html should lead to 192.168.124.40/images.html. The
page loads up but the embedded images do not show up. A tail -f on
access.log shows

1330494519.583 5 192.168.124.41 TCP_REFRESH_UNMODIFIED/304 357 GET
http://192.168.124.41/images.html - FIRST_UP_PARENT/server2 -
1330494519.814 3 192.168.124.41 TCP_MISS/404 582 GET
http://192.168.124.41/myimage.jpg - FIRST_UP_PARENT/server1 text/html

images.html has an image embedded in it called myimage.jpg. Squid does well
to redirect incoming requests for images.html to server2 but it is still
looking for myimage.jpg on server1. Why is this happening?

Thanks,
Adi

I have reproduced squid.conf below

########################squid.conf####################
############### http accel configuration ###########

#let squid listen on the public ip addr port 80 and apache on localhost 80
http_port 192.168.124.41:80 accel defaultsite=192.168.124.41

#192.168.124.41/images has to be redirected to another web server
acl images urlpath_regex images

#now that images has been found deny the request being sent to server 1
cache_peer 127.0.0.1 parent 80 0 no-query originserver name=server1
cache_peer_access server1 deny images

#now send the image requests to server 2, first create peer
cache_peer 192.168.124.40 parent 80 0 no-query originserver name=server2
#now send image requests to peer
cache_peer_access server2 allow images
cache_peer_access server2 deny all

#
# 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

#
# 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
#

# 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 deny all

# Squid normally listens to port 3128
#http_port 3128

# 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 /var/spool/squid 100 16 256

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

# 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

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