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Posted to users@httpd.apache.org by Pranjal Thakur <pr...@gmail.com> on 2009/07/06 17:24:42 UTC
[users@httpd] Load balancing between different versions of a web application
This is more of a theoretical question.
I want to know if it is possible to do this:
I have various versions of a web application, each running certain number of
instances.
When a request comes in, it goes to a certain instance of some version.
I want the load balancer to now route further requests from this user to
only the instances of the version it was first routed to.
I can maintain a cookie or some other way to save the version number of the
instance. But I need the load balancer to now take that into consideration
for further requests.
Is this possible and Is there any plugin available for this?
Any help will be appreciated. thank you.
Re: [users@httpd] Re: Load balancing between different versions of a
web application
Posted by Pranjal Thakur <pr...@gmail.com>.
On Mon, Jul 6, 2009 at 9:04 PM, Jonathan Zuckerman <j....@gmail.com>wrote:
> On Mon, Jul 6, 2009 at 5:56 PM, Pranjal Thakur<pr...@gmail.com> wrote:
> > I am using the apache mod_proxy load balancer:
> > http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html
> >
> > I am not able to find any configuration change that I could make to
> achieve
> > this.
> > Here is the situation:
> > my web application has 2 versions say N and N+1. N has 5 instances and
> N+1
> > has 5 instances running on the same cloud.
> > A user gets to an instance of N the first time. I want all the following
> > requests from that user to go to any of the 5 instances of N and not go
> to
> > any instance of N+1 at all.
> >
> >
> > On Mon, Jul 6, 2009 at 7:26 PM, Jonathan Zuckerman <
> j.zuckerman@gmail.com>
> > wrote:
> >>
> >> On Mon, Jul 6, 2009 at 1:49 PM, Pranjal Thakur<pr...@gmail.com>
> wrote:
> >> > Hello,
> >> > My problem is mentioned in the previous post (see below). I want to
> add
> >> > that
> >> > I cannot use sticky sessions as the cloud that hosts our sessions is
> >> > fully
> >> > clustered and so has the ability to send requests to a different
> server
> >> > instance in case the current instance fails.
> >> >
> >> > let me know if there is a way to achieve this.
> >> > thanks.
> >> >
> >> > On Mon, Jul 6, 2009 at 11:24 AM, Pranjal Thakur <pr...@gmail.com>
> >> > wrote:
> >> >>
> >> >> This is more of a theoretical question.
> >> >> I want to know if it is possible to do this:
> >> >>
> >> >> I have various versions of a web application, each running certain
> >> >> number
> >> >> of instances.
> >> >> When a request comes in, it goes to a certain instance of some
> version.
> >> >> I want the load balancer to now route further requests from this user
> >> >> to
> >> >> only the instances of the version it was first routed to.
> >> >> I can maintain a cookie or some other way to save the version number
> of
> >> >> the instance. But I need the load balancer to now take that into
> >> >> consideration for further requests.
> >> >> Is this possible and Is there any plugin available for this?
> >> >>
> >> >> Any help will be appreciated. thank you.
> >> >
> >> >
> >>
> >> Probably will need to contact whoever hosts your app for more info,
> >> but theoretically I don't see why this can't be achieved, what type of
> >> load balancer are you using? I used netscaler briefly in the past and
> >> it was infinitely configurable..
> >>
> >> ---------------------------------------------------------------------
> >> The official User-To-User support forum of the Apache HTTP Server
> Project.
> >> See <URL:http://httpd.apache.org/userslist.html> for more info.
> >> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> >> " from the digest: users-digest-unsubscribe@httpd.apache.org
> >> For additional commands, e-mail: users-help@httpd.apache.org
> >>
> >
> >
>
> I've written a few APIs and we always include the version in the URL
> somewhere (querystring, subdomain, whatever), so that new versions
> won't break compatibility. Is this an option?
>
> ---------------------------------------------------------------------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See <URL:http://httpd.apache.org/userslist.html> for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> " from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
yes, that sounds like an option. what kind of apis do I need to write to
make the apache web server read the version and route to the correct
instance?
Re: [users@httpd] Re: Load balancing between different versions of a
web application
Posted by Jonathan Zuckerman <j....@gmail.com>.
On Mon, Jul 6, 2009 at 5:56 PM, Pranjal Thakur<pr...@gmail.com> wrote:
> I am using the apache mod_proxy load balancer:
> http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html
>
> I am not able to find any configuration change that I could make to achieve
> this.
> Here is the situation:
> my web application has 2 versions say N and N+1. N has 5 instances and N+1
> has 5 instances running on the same cloud.
> A user gets to an instance of N the first time. I want all the following
> requests from that user to go to any of the 5 instances of N and not go to
> any instance of N+1 at all.
>
>
> On Mon, Jul 6, 2009 at 7:26 PM, Jonathan Zuckerman <j....@gmail.com>
> wrote:
>>
>> On Mon, Jul 6, 2009 at 1:49 PM, Pranjal Thakur<pr...@gmail.com> wrote:
>> > Hello,
>> > My problem is mentioned in the previous post (see below). I want to add
>> > that
>> > I cannot use sticky sessions as the cloud that hosts our sessions is
>> > fully
>> > clustered and so has the ability to send requests to a different server
>> > instance in case the current instance fails.
>> >
>> > let me know if there is a way to achieve this.
>> > thanks.
>> >
>> > On Mon, Jul 6, 2009 at 11:24 AM, Pranjal Thakur <pr...@gmail.com>
>> > wrote:
>> >>
>> >> This is more of a theoretical question.
>> >> I want to know if it is possible to do this:
>> >>
>> >> I have various versions of a web application, each running certain
>> >> number
>> >> of instances.
>> >> When a request comes in, it goes to a certain instance of some version.
>> >> I want the load balancer to now route further requests from this user
>> >> to
>> >> only the instances of the version it was first routed to.
>> >> I can maintain a cookie or some other way to save the version number of
>> >> the instance. But I need the load balancer to now take that into
>> >> consideration for further requests.
>> >> Is this possible and Is there any plugin available for this?
>> >>
>> >> Any help will be appreciated. thank you.
>> >
>> >
>>
>> Probably will need to contact whoever hosts your app for more info,
>> but theoretically I don't see why this can't be achieved, what type of
>> load balancer are you using? I used netscaler briefly in the past and
>> it was infinitely configurable..
>>
>> ---------------------------------------------------------------------
>> The official User-To-User support forum of the Apache HTTP Server Project.
>> See <URL:http://httpd.apache.org/userslist.html> for more info.
>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>> " from the digest: users-digest-unsubscribe@httpd.apache.org
>> For additional commands, e-mail: users-help@httpd.apache.org
>>
>
>
I've written a few APIs and we always include the version in the URL
somewhere (querystring, subdomain, whatever), so that new versions
won't break compatibility. Is this an option?
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Re: Load balancing between different versions of a
web application
Posted by Pranjal Thakur <pr...@gmail.com>.
I am using the apache mod_proxy load balancer:
http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html
I am not able to find any configuration change that I could make to achieve
this.
Here is the situation:
my web application has 2 versions say N and N+1. N has 5 instances and N+1
has 5 instances running on the same cloud.
A user gets to an instance of N the first time. I want all the following
requests from that user to go to any of the 5 instances of N and not go to
any instance of N+1 at all.
On Mon, Jul 6, 2009 at 7:26 PM, Jonathan Zuckerman <j....@gmail.com>wrote:
> On Mon, Jul 6, 2009 at 1:49 PM, Pranjal Thakur<pr...@gmail.com> wrote:
> > Hello,
> > My problem is mentioned in the previous post (see below). I want to add
> that
> > I cannot use sticky sessions as the cloud that hosts our sessions is
> fully
> > clustered and so has the ability to send requests to a different server
> > instance in case the current instance fails.
> >
> > let me know if there is a way to achieve this.
> > thanks.
> >
> > On Mon, Jul 6, 2009 at 11:24 AM, Pranjal Thakur <pr...@gmail.com>
> wrote:
> >>
> >> This is more of a theoretical question.
> >> I want to know if it is possible to do this:
> >>
> >> I have various versions of a web application, each running certain
> number
> >> of instances.
> >> When a request comes in, it goes to a certain instance of some version.
> >> I want the load balancer to now route further requests from this user to
> >> only the instances of the version it was first routed to.
> >> I can maintain a cookie or some other way to save the version number of
> >> the instance. But I need the load balancer to now take that into
> >> consideration for further requests.
> >> Is this possible and Is there any plugin available for this?
> >>
> >> Any help will be appreciated. thank you.
> >
> >
>
> Probably will need to contact whoever hosts your app for more info,
> but theoretically I don't see why this can't be achieved, what type of
> load balancer are you using? I used netscaler briefly in the past and
> it was infinitely configurable..
>
> ---------------------------------------------------------------------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See <URL:http://httpd.apache.org/userslist.html> for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> " from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
Re: [users@httpd] Re: Load balancing between different versions of a
web application
Posted by Jonathan Zuckerman <j....@gmail.com>.
On Mon, Jul 6, 2009 at 1:49 PM, Pranjal Thakur<pr...@gmail.com> wrote:
> Hello,
> My problem is mentioned in the previous post (see below). I want to add that
> I cannot use sticky sessions as the cloud that hosts our sessions is fully
> clustered and so has the ability to send requests to a different server
> instance in case the current instance fails.
>
> let me know if there is a way to achieve this.
> thanks.
>
> On Mon, Jul 6, 2009 at 11:24 AM, Pranjal Thakur <pr...@gmail.com> wrote:
>>
>> This is more of a theoretical question.
>> I want to know if it is possible to do this:
>>
>> I have various versions of a web application, each running certain number
>> of instances.
>> When a request comes in, it goes to a certain instance of some version.
>> I want the load balancer to now route further requests from this user to
>> only the instances of the version it was first routed to.
>> I can maintain a cookie or some other way to save the version number of
>> the instance. But I need the load balancer to now take that into
>> consideration for further requests.
>> Is this possible and Is there any plugin available for this?
>>
>> Any help will be appreciated. thank you.
>
>
Probably will need to contact whoever hosts your app for more info,
but theoretically I don't see why this can't be achieved, what type of
load balancer are you using? I used netscaler briefly in the past and
it was infinitely configurable..
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
[users@httpd] Re: Load balancing between different versions of a web application
Posted by Pranjal Thakur <pr...@gmail.com>.
Hello,
My problem is mentioned in the previous post (see below). I want to add that
I cannot use sticky sessions as the cloud that hosts our sessions is fully
clustered and so has the ability to send requests to a different server
instance in case the current instance fails.
let me know if there is a way to achieve this.thanks.
On Mon, Jul 6, 2009 at 11:24 AM, Pranjal Thakur <pr...@gmail.com> wrote:
> This is more of a theoretical question.
> I want to know if it is possible to do this:
>
> I have various versions of a web application, each running certain number
> of instances.
> When a request comes in, it goes to a certain instance of some version.
> I want the load balancer to now route further requests from this user to
> only the instances of the version it was first routed to.
> I can maintain a cookie or some other way to save the version number of the
> instance. But I need the load balancer to now take that into consideration
> for further requests.
>
> Is this possible and Is there any plugin available for this?
>
> Any help will be appreciated. thank you.
>
>