The cache manager (cachemgr.cgi) is a CGI utility for displaying statistics about the memory usage of a running Squid process. It is also a more convenient way to manage the cache and view statistics without logging the server.
First, a running Web server on your system is required. To check if
Apache is already running, as
root enter the command
If a message like this appears:
Checking for service httpd: OK Server uptime: 1 day 18 hours 29 minutes 39 seconds
Apache is running on the machine. Otherwise, enter
start to start Apache with
the SUSE LINUX default settings.
The last step to set it up is to copy the file
cachemgr.cgi to the Apache directory
cp /usr/share/doc/packages/squid/scripts/cachemgr.cgi /srv/www/cgi-bin/
There are some default settings in the original file required for the cache manager. The first ACL is the most important, as the cache manager tries to communicate with Squid over the cache_object protocol.
acl manager proto cache_object acl localhost src 127.0.0.1/255.255.255.255
The following rules should also be contained:
http_access allow manager localhost http_access deny manager
The following rules assume that the Web server and Squid are running on the same machine. If the communication between the cache manager and Squid originates at the Web server on another computer, include an extra ACL as in Example 33.2, “Access Rules”.
Example 33.2. Access Rules
acl manager proto cache_object acl localhost src 127.0.0.1/255.255.255.255 acl webserver src 192.168.1.7/255.255.255.255 # webserver IP
Then add the rules in Example 33.3, “Access Rules”.
Example 33.3. Access Rules
http_access allow manager localhost http_access allow manager webserver http_access deny manager
Configure a password for the manager for access to more options, like
closing the cache remotely or viewing more information about the cache.
For this, configure the entry
a password for the manager and the list of options to view. This list
appears as a part of the entry comments in
Restart Squid every time the configuration file
is changed. Do this easily with