Re: [squid-users] Problem with siblings running on different http ports

Lu, Roy wrote:
> Hi,
>
> This has been resolved. I downloaded 3.0 and reinstalled with the same
> setup and ran the same tests. Everything worked as expected. Thanks.

Please be aware that state may change.

The Squid-2 behavior there was more correct with the RFC requirements.
When the 3.0 code is brought into line there may be some configuration
needed to create the non-standard behavior work again.

IIRC the forcedomain= setting on cache_peer may have been what you were
looking for earlier.

Amos

>
> Roy
>
> -----Original Message-----
> From: Lu, Roy
> Sent: Friday, June 26, 2009 11:21 AM
> To: Lu, Roy; squid-users_at_squid-cache.org
> Subject: RE: [squid-users] Problem with siblings running on different
> http ports
>
> Here is some more information on my previous question. The
> configuration, test requests and logs are listed below.
>
> Configuration on squid A (http port 7129):
> ------------------------------------
> http_port 7129 accel defaultsite=vmdevcagpcna01.firstamdata.net
>
> acl ACLGPLSites dstdomain vmdevcagpcna01.firstamdata.net
> acl ACLSquidPeers src 192.168.54.65
>
> http_access allow ACLGPLSites
> icp_access allow ACLSquidPeers
> #miss_access allow ACLSquidPeers
>
> # origin app server is vmdevcagpcna01 (192.168.54.64:7533)
> cache_peer vmdevcagpcna01.firstamdata.net parent 7533 0 no-query
> originserver name=OriginGPLServer
> cache_peer 192.168.54.65 sibling 7130 7230 name=GPLCache2 proxy-only
>
> cache_peer_access OriginGPLServer allow ACLGPLSites
> cache_peer_access GPLCache2 allow ACLGPLSites
>
> icp_port 7229
>
> # allow purge method from localhost
> acl PURGE method purge
> acl localhost src 192.168.54.65
> http_access allow purge localhost
> http_access deny purge
> -----------------------------------
>
> Configuration on squid B (http port 7130):
> ------------------------------------
> http_port 7130 accel defaultsite=vmdevcagpcna01.firstamdata.net
>
> acl ACLGPLSites dstdomain vmdevcagpcna01.firstamdata.net
> acl ACLSquidPeers src 192.168.54.65
>
> http_access allow ACLGPLSites
> icp_access allow ACLSquidPeers
> #miss_access allow ACLSquidPeers
>
> # origin app server is vmdevcagpcna01 (192.168.54.64:7533)
> cache_peer vmdevcagpcna01.firstamdata.net parent 7533 0 no-query
> originserver name=OriginGPLServer
> cache_peer 192.168.54.65 sibling 7129 7229 name=GPLCache1 proxy-only
>
> cache_peer_access OriginGPLServer allow ACLGPLSites
> cache_peer_access GPLCache1 allow ACLGPLSites
>
> icp_port 7230
>
> # allow purge method from localhost
> acl PURGE method purge
> acl localhost src 192.168.54.65
> http_access allow purge localhost
> http_access deny purge
> ------------------------------------
>
> The sequence of requests that I sent was:
> ------------------------------------
> ./squidclient -h 192.168.54.65 -p 7129 -m HEAD -H "Cache-Control:
> only-if-cached\n"
> "http://vmdevcagpcna01.firstamdata.net/gis/v1.6.3/wms?REQUEST=GetMap&SER
> VICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRU
> E&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:property_
> layer&QuadKey=0230132002300312230"
>
> ./squidclient -h 192.168.54.65 -p 7130 -m HEAD -H "Cache-Control:
> only-if-cached\n"
> "http://vmdevcagpcna01.firstamdata.net/gis/v1.6.3/wms?REQUEST=GetMap&SER
> VICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRU
> E&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:property_
> layer&QuadKey=0230132002300312230"
>
> ./squidclient -h 192.168.54.65 -p 7130
> "http://vmdevcagpcna01.firstamdata.net/gis/v1.6.3/wms?REQUEST=GetMap&SER
> VICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRU
> E&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:property_
> layer&QuadKey=0230132002300312230"
> ------------------------------------
>
> Access.log from Squid A:
> ------------------------------------
> 1246040022.545 0 192.168.54.65 TCP_MEM_HIT/200 274 HEAD
> http://vmdevcagpcna01.firstamdata.net:7129/gis/v1.6.3/wms?REQUEST=GetMap
> &SERVICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT
> =TRUE&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:prope
> rty_layer&QuadKey=0230132002300312230 - NONE/-
> application/vnd.ogc.se_xml
> 1246040041.305 0 192.168.54.65 UDP_MISS/000 274 ICP_QUERY
> http://vmdevcagpcna01.firstamdata.net:7130/gis/v1.6.3/wms?REQUEST=GetMap
> &SERVICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT
> =TRUE&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:prope
> rty_layer&QuadKey=0230132002300312230 - NONE/- -
> -------------------------------------
>
> Access.log from Squid B:
> -------------------------------------
> 1246040028.217 0 192.168.54.65 TCP_MISS/504 290 HEAD
> http://vmdevcagpcna01.firstamdata.net:7130/gis/v1.6.3/wms?REQUEST=GetMap
> &SERVICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT
> =TRUE&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:prope
> rty_layer&QuadKey=0230132002300312230 - NONE/- text/html
> 1246040041.391 86 192.168.54.65 TCP_MISS/200 5762 GET
> http://vmdevcagpcna01.firstamdata.net:7130/gis/v1.6.3/wms?REQUEST=GetMap
> &SERVICE=WMS&VERSION=1.1.1&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT
> =TRUE&SRS=EPSG:4326&WIDTH=256&HEIGHT=256&reaspect=false&LAYERS=GPL:prope
> rty_layer&QuadKey=0230132002300312230 - FIRST_UP_PARENT/OriginGPLServer
> image/png
> -------------------------------------
>
> As you can see that, A has the object(TCP_MEM_HIT), while B does
> not(TCP_MISS). But when a request for the object is sent to B, A gets a
> UDP_MISS with a URL having squid B's port number 7130 in it. I don't
> understand why.
>
> Thanks!
> Roy
>
> -----Original Message-----
> From: Lu, Roy [mailto:rlu_at_FACorelogic.com]
> Sent: Friday, June 26, 2009 10:28 AM
> To: squid-users_at_squid-cache.org
> Subject: [squid-users] Problem with siblings running on different http
> ports
>
> Dear list,
>
> I have two squid sibling caches in accelerator mode with different http
> ports (squid A port 3128 and squid B 3129). Both point to the same back
> end origin server. When i used the squidclient to test them, I made sure
> squid A has a requested object in cache(TCP_HIT), while squid B does
> not(TCP_MISS).
> Now when I send a request to B, I can see a message in A's access log
> with UDP_MISS status, but the ICP_QUERY url contains B's http port 3129.
> So the result is B goes to the backend sever to get the object, instead
> of from A.
>
> Why does the ICP_QUERY have the requesting silbling's http port?
>
> Thanks,
> Roy
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