Re: [squid-users] Squid forgetting originservers when box has several IPs

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@services.hu> 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
>
>
>
Received on Fri Jun 29 2007 - 06:36:44 MDT