[squid-users] Load Balancing Query
Hi All, Want to know if load balancing is possible with squid by maintaining sessions. Health check should be TCP Ports eg: Server A - Active port 8080 Server B - Active port 8080 Client - Squid - Server A and/or B Request 1 comes from 'Client A' Squid forwards the request to 'Server A' Request 2 comes from 'Client A' Squid forwards the request to 'Server A' and so on any further request from 'Client A' squid should only forward to 'Server A' until the session is same if Request 1 comes from 'Client B' Squid forwards the request to 'Server B' Request 2 comes from 'Client B' Squid forwards the request to 'Server B' if 'Server A' fails Squid should forward all the request to 'Server B' //Remy -- Disclaimer and Confidentiality This material has been checked for computer viruses and although none has been found, we cannot guarantee that it is completely free from such problems and do not accept any liability for loss or damage which may be caused. Please therefore check any attachments for viruses before using them on your own equipment. If you do find a computer virus please inform us immediately so that we may take appropriate action. This communication is intended solely for the addressee and is confidential. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. The views expressed in this message are those of the individual sender, and may not necessarily be that of ISA.
Re: [squid-users] Load Balancing Query
Mario Remy Almeida wrote: Hi All, Want to know if load balancing is possible with squid by maintaining sessions. Health check should be TCP Ports eg: Server A - Active port 8080 Server B - Active port 8080 Client - Squid - Server A and/or B Request 1 comes from 'Client A' Squid forwards the request to 'Server A' Request 2 comes from 'Client A' Squid forwards the request to 'Server A' and so on any further request from 'Client A' squid should only forward to 'Server A' until the session is same if Request 1 comes from 'Client B' Squid forwards the request to 'Server B' Request 2 comes from 'Client B' Squid forwards the request to 'Server B' if 'Server A' fails Squid should forward all the request to 'Server B' //Remy HTTP is stateless. It contains no such thing as sessions. That is a browser feature. What you are looking for is something like CARP or sourcehash peering algorithms. They keep all requests for certain URLs sent to the same place (CARP) or all requests for the same IP to the same place (sourcehash). see http://www.squid-cache.org/Doc/config/cache_peer Amos -- Please be using Current Stable Squid 2.7.STABLE6 or 3.0.STABLE15 Current Beta Squid 3.1.0.8 or 3.0.STABLE16-RC1
Re: [squid-users] Load Balancing Query
Hi Amos, Thanks for that, so I need to use carp and sourcehash to do load balancing, right? but where do I specify in squid to monitor the prots? I mean if port 8080 is down on 'ServerA' how Squid will know that it should send the request to 'ServerB' on port 8080? //Remy On Mon, 2009-06-15 at 23:05 +1200, Amos Jeffries wrote: Mario Remy Almeida wrote: Hi All, Want to know if load balancing is possible with squid by maintaining sessions. Health check should be TCP Ports eg: Server A - Active port 8080 Server B - Active port 8080 Client - Squid - Server A and/or B Request 1 comes from 'Client A' Squid forwards the request to 'Server A' Request 2 comes from 'Client A' Squid forwards the request to 'Server A' and so on any further request from 'Client A' squid should only forward to 'Server A' until the session is same if Request 1 comes from 'Client B' Squid forwards the request to 'Server B' Request 2 comes from 'Client B' Squid forwards the request to 'Server B' if 'Server A' fails Squid should forward all the request to 'Server B' //Remy HTTP is stateless. It contains no such thing as sessions. That is a browser feature. What you are looking for is something like CARP or sourcehash peering algorithms. They keep all requests for certain URLs sent to the same place (CARP) or all requests for the same IP to the same place (sourcehash). see http://www.squid-cache.org/Doc/config/cache_peer Amos -- Disclaimer and Confidentiality This material has been checked for computer viruses and although none has been found, we cannot guarantee that it is completely free from such problems and do not accept any liability for loss or damage which may be caused. Please therefore check any attachments for viruses before using them on your own equipment. If you do find a computer virus please inform us immediately so that we may take appropriate action. This communication is intended solely for the addressee and is confidential. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. The views expressed in this message are those of the individual sender, and may not necessarily be that of ISA.
Re: [squid-users] Load Balancing Query
Mario Remy Almeida wrote: Hi Amos, Thanks for that, so I need to use carp and sourcehash to do load balancing, right? only the one you want. but where do I specify in squid to monitor the prots? I mean if port 8080 is down on 'ServerA' how Squid will know that it should send the request to 'ServerB' on port 8080? It's automatic in the background. The latest 2.HEAD and 3.1 have options to configure how long it takes to detect. Other squid attempt ~10 connects and then failover. Amos //Remy On Mon, 2009-06-15 at 23:05 +1200, Amos Jeffries wrote: Mario Remy Almeida wrote: Hi All, Want to know if load balancing is possible with squid by maintaining sessions. Health check should be TCP Ports eg: Server A - Active port 8080 Server B - Active port 8080 Client - Squid - Server A and/or B Request 1 comes from 'Client A' Squid forwards the request to 'Server A' Request 2 comes from 'Client A' Squid forwards the request to 'Server A' and so on any further request from 'Client A' squid should only forward to 'Server A' until the session is same if Request 1 comes from 'Client B' Squid forwards the request to 'Server B' Request 2 comes from 'Client B' Squid forwards the request to 'Server B' if 'Server A' fails Squid should forward all the request to 'Server B' //Remy HTTP is stateless. It contains no such thing as sessions. That is a browser feature. What you are looking for is something like CARP or sourcehash peering algorithms. They keep all requests for certain URLs sent to the same place (CARP) or all requests for the same IP to the same place (sourcehash). see http://www.squid-cache.org/Doc/config/cache_peer Amos -- Please be using Current Stable Squid 2.7.STABLE6 or 3.0.STABLE15 Current Beta Squid 3.1.0.8 or 3.0.STABLE16-RC1
Re: [squid-users] Load Balancing Query
Thanks Amos for the help On Tue, 2009-06-16 at 00:30 +1200, Amos Jeffries wrote: Mario Remy Almeida wrote: Hi Amos, Thanks for that, so I need to use carp and sourcehash to do load balancing, right? only the one you want. but where do I specify in squid to monitor the prots? I mean if port 8080 is down on 'ServerA' how Squid will know that it should send the request to 'ServerB' on port 8080? It's automatic in the background. The latest 2.HEAD and 3.1 have options to configure how long it takes to detect. Other squid attempt ~10 connects and then failover. Amos //Remy On Mon, 2009-06-15 at 23:05 +1200, Amos Jeffries wrote: Mario Remy Almeida wrote: Hi All, Want to know if load balancing is possible with squid by maintaining sessions. Health check should be TCP Ports eg: Server A - Active port 8080 Server B - Active port 8080 Client - Squid - Server A and/or B Request 1 comes from 'Client A' Squid forwards the request to 'Server A' Request 2 comes from 'Client A' Squid forwards the request to 'Server A' and so on any further request from 'Client A' squid should only forward to 'Server A' until the session is same if Request 1 comes from 'Client B' Squid forwards the request to 'Server B' Request 2 comes from 'Client B' Squid forwards the request to 'Server B' if 'Server A' fails Squid should forward all the request to 'Server B' //Remy HTTP is stateless. It contains no such thing as sessions. That is a browser feature. What you are looking for is something like CARP or sourcehash peering algorithms. They keep all requests for certain URLs sent to the same place (CARP) or all requests for the same IP to the same place (sourcehash). see http://www.squid-cache.org/Doc/config/cache_peer Amos -- Disclaimer and Confidentiality This material has been checked for computer viruses and although none has been found, we cannot guarantee that it is completely free from such problems and do not accept any liability for loss or damage which may be caused. Please therefore check any attachments for viruses before using them on your own equipment. If you do find a computer virus please inform us immediately so that we may take appropriate action. This communication is intended solely for the addressee and is confidential. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. The views expressed in this message are those of the individual sender, and may not necessarily be that of ISA.
Re: [squid-users] Load balancing query
On Fri, 28 Jan 2005, Carinus Carelse wrote: I have two external networks connected and I have one proxy server that is servicing about 500 users. I would like the squid box to do some load balancing across the two external link so that the http traffic does not just go through the one link. Is this possible and how do i go about setting this up. This is best done by route load balancing in your OS. But you can use tcp_outgoing_address to make Squid select which link to use for certain kinds of request. Regards Henrik
[squid-users] Load balancing query
I have two external networks connected and I have one proxy server that is servicing about 500 users. I would like the squid box to do some load balancing across the two external link so that the http traffic does not just go through the one link. Is this possible and how do i go about setting this up. Carinus
