Re: [squid-users] fail-safe and load balancing with reverse proxy

Dean Weimer wrote:
> Try using "peer_connect_timeout" You can lower the time out so it fails over faster.
>
> Thanks,
> Dean Weimer
> Network Administrator
> Orscheln Management Co
>
>> -----Original Message-----
>> From: Király László [mailto:kiru_at_mail.madalbal.hu]
>> Sent: Wednesday, June 02, 2010 3:14 AM
>> To: squid-users_at_squid-cache.org
>> Subject: Re: [squid-users] fail-safe and load balancing with reverse proxy
>>
>> Okay, I compile a brand new 3.1.4 squid with --icmp-enable option.
>>
>> I added also to the squid.conf:
>> ---
>> pinger_program /usr/local/squid/libexec/pinger
>> query_icmp on
>> test_reachability on
>> ---
>>
>> It didn't help. :S
>>
>>> Hi List,
>>>
>>> I use a squid3-3.0.STABLE8 reverse proxy on a debian system.
>>> It makes forward queries to web server, which is accessible from 2
>>> public ips.
>>>
>>> My peer config:
>>> ---
>>> cache_peer x.y.z.57 parent 80 0 no-query no-digest no-netdb-exchange
>>> originserver name=parent1 round-robin login=PASS weight=16
>>> cache_peer a.b.c.118 parent 80 0 no-query no-digest no-netdb-exchange
>>> originserver name=parent2 round-robin login=PASS weight=1
>>> ---
>>>
>>> I would like to do a fail-safe connection to the web server.
>>>
>>> It's working, but if one of the public ips isn't accessible, there
>>> is some Connection timed out (110) proxy message until the parent is
>>> detected as dead, while the proxy tries to query the offline parent.
>>>
>>> How can I eliminate this thing?
>>> Why squid doesn't resend the query to the another parent?
>>>
>>> I cannot set ICP queries while the parent is a simple web server.
>>> Is there a way to make better dead peer detection?
>>>
>>> Can I do this whith icmp queries?
>>>
>>> Best regards,
>>> László Király
>> ------- End of Original Message -------
>

3.1 also brings in the cache_peer options connect-timeout and
connect-fail-limit to set per-peer how long to wait for TCP connections
to failover and how many attempts to allow before declaring it dead.

Note: ICMP and NetDB is used to detect the closest source when multiple
are available. Not the live/dead status of a peer.

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE9 or 3.1.4