Peter, you should upgrade your squid to latest stable (for many
reasons), but mostly because it implements url monitor for cache
peers, this method is far more usefull since It checks your apache is
working fine, not just the machine is running.
eg.
cache_peer Y.Y.Y.Y parent 80 0 originserver
no-digest weight=3 monitorurl=/someurlcheck.html monitorinterval=10
monitortimeout=2
Regards, Pablo
On 6/29/07, Peter Siklosi <peter.siklosi@xxxxxxxxxxx> wrote:
Hi!
I use Squid for years now as loadbalancer and accelerator.
Lately our ISP decided to replace the whole IP range we use. To ease
transition we were given a two months period in which the old and new
IPs are working the same time.
As soon as we start using the second IP on our proxy server, and restart
squid to bind to the new interface too, squid serves some requests, then
decides that the originservers are gone.
cache_peers are apache2 webservers so instead of ICP requests they got
udp echo requests. They get some UDP packages (checked with tcpdump),
but when they disappear, they do not get echo requests, and they wont
come back.
If I replace the 7 (udp echo) with 0 for ICP port in the cache_peer
line, squid works, but do not notice weather the server is up&running or
not.
I use: Squid 2.6.5 (default Debian/Etch binary)
config and log is attached.
If I need to provide anything else, please let me know!
Detailed (debug) logs shows, that the first few requests have parents:
2007/06/28 13:44:23| peerGetSomeParent: GET www.aexample.com
2007/06/28 13:44:23| peerSelect: FIRST_UP_PARENT/Y.Y.Y.Y
2007/06/28 13:44:23| peerAddFwdServer: adding Y.Y.Y.Y FIRST_UP_PARENT
2007/06/28 13:44:23| peerAddFwdServer: adding Y.Y.Y.Y ANY_PARENT
2007/06/28 13:44:23| peerAddFwdServer: adding Y.Y.Y.X ANY_PARENT
[...]
2007/06/28 13:44:26| peerSelectFoo: 'GET www.example.com'
2007/06/28 13:44:26| peerSelectFoo: direct = DIRECT_NO
2007/06/28 13:44:26| peerDigestLookup: peer Y.Y.Y.Y
2007/06/28 13:44:26| peerDigestLookup: gone!
2007/06/28 13:44:26| peerDigestLookup: peer 81.2.252.112
2007/06/28 13:44:26| peerDigestLookup: gone!
2007/06/28 13:44:26| neighborsDigestSelect: choices: 0 (0)
2007/06/28 13:44:26| peerNoteDigestLookup: peer <none>, lookup: LOOKUP_NONE
Thanks in advance!
Peter Siklosi
visible_hostname www.example.com
http_port 80 vhost defaultsite=www.example.com
cache_peer Y.Y.Y.Y parent 80 7 originserver no-digest weight=3
cache_peer Y.Y.Y.X parent 80 7 originserver no-digest weight=5
acl hammerers src 193.28.86.0/255.255.255.0
acl all src 0.0.0.0/0.0.0.0
http_access deny hammerers
http_access allow all
# emulate_httpd_log on
cache_log /var/log/squid/cache.log
cache_dir ufs /home/squid 20000 128 256
cache_access_log /var/log/squid/access.log
cache_mem 1200 MB
maximum_object_size 8 MB
maximum_object_size_in_memory 2 MB
cache_replacement_policy heap LFUDA
memory_pools on
memory_pools_limit 400 MB
error_directory /usr/share/squid/errors/Hungarian
