I understand how Squid can be configured as a Load Balancer rotating round-robin among a set of web servers IP addresses: - http://wiki.squid-cache.org/ConfigExamples/Strange/RotatingIPs - http://dlc.sun.com/osol/docs/content/SQUIDBALANCE/ggyxf.html The problem is that if one of those web servers is down (either administratively or unplanned), Squid will continue to send traffic to it, right? If SNMP is enabled on Squid (see below), can Squid monitor the web servers over SNMP and dynamically allocate traffic based on whether the servers are up or not? If this is possible, how might it be configured, and where might it be documented? Is there a better way to do this? Would it be better to manage the dynamic process with Heartbeat and Linux HA (with http://en.wikipedia.org/wiki/Linux-HA), even if there was only a single Squid server and not a cluster? I would greatly appreciate ANY discussion on this. Advantages, disadvantages, configurations, alternatives, etc. Many thanks in advance. ------------------------------------------------------- To use SNMP with squid, it must be enabled with the configure script, and rebuilt. To enable SNMP in squid go to squid src directory and follow the steps given below : ./configure --enable-snmp [ ... other configure options ] make all make install And edit following tags in squid.conf file : acl aclname snmp_community public snmp_access aclname Once you configure squid and SNMP server, Start SNMP and squid. -------------------------------------------------------
