Re: [squid-users] parent request order

Hello Eliezer,

Am 24.06.2013 13:47, schrieb Eliezer Croitoru:
> Hey TLS.
>
> There is a solution for that of-course...

thanks for your advise, but in the meantime some other tasks reached my
desk and it will take some time until I can get back to that squid-issue.

I will later check your links and the idea with the external_acl helper
when I won free my desk :-).

Thomas

> you should use some External_Acl helper that will check the parent
> proxy(each and one of them) for a test like "www.example.com"
> which the external_acl should receive some specific data and that it
> will not be served from cache...
> take a look at my code in:
> https://github.com/elico/squid-helpers/tree/master/squid_helpers/proxy_hb_check
>
>
> This is an example that replaces the old cache_peer "monitorX"
> http://www.squid-cache.org/Doc/config/cache_peer/
> The "monitorX" that was yet to be ported into 3.3 and 3.head should do
> exactly what you need.
>
> So for now use external_acl helper that will make sure which of the
> proxies is on and will mark it as on.
> the external helper should check for the parent state and if both are
> not up you can trigger some alarm or something else.
>
> Do you think this kind of solution will fit your scenario?
>
> Eliezer
>
>
> On 06/24/2013 12:01 PM, T Ls wrote:
>> Am 19.6.2013 16:13, schrieb Marcus Kool:
>>> On Wed, Jun 19, 2013 at 09:27:54AM -0300, Marcus Kool wrote:
>>>> On 06/19/2013 09:02 AM, T Ls wrote:
>>>> >...
>>>> >What I want to do is:
>>>> >a) switch to alternative parents automatically
>>>> >b) in case of P_1-failure: distribute N_1-traffic over S_2 and S_3
>>>> >c) in normal operation send all requests to P_1 and no requests to
>>>> S_2 or
>>>> >S_3
>>>>
>>>> wpad does a good job.
>>>> I am not sure how it balances but the failover works fine.
>>> ...
>>> So, what you can do is divide the client IP address range in
>>> 3 segments and via the PAC file make a decision which
>>> proxy (S_i) will be the primary proxy; the browser wil only
>>> use the secondary proxy when the first one is not available.
>>
>> I checked this out, but it did not work, because when the PAC-File
>> returns:
>>
>> "PROXY p1:8080; PROXY p2:8080";
>>
>> and the parent-proxy of p1 is not available, p1 returns a error-message
>> ("parent not available") and the browser will not failover to p2,
>> because the request yield HTML and everything seems to be fine for the
>> browser.
>>
>> I am not sure, if turning off the error massages is an option?
>>
>> Kind regards
>> Thomas
>
Received on Wed Jun 26 2013 - 06:18:10 MDT