Re: [ClusterLabs] Passing and binding to virtual IP in my service

2016-01-08 Thread Solutions Solutions 
hi Nikhil,
 can you send me the N+1 redundancy configuration file,which you posted
earlier.

On Thu, Jan 7, 2016 at 2:58 PM, Nikhil Utane 
wrote:

> Hi,
>
> I have my cluster up and running just fine. I have a dummy service that
> sends UDP packets out to another host.
>
>  Resource Group: MyGroup
>  ClusterIP  (ocf::heartbeat:IPaddr2):   Started node1
>  UDPSend(ocf::nikhil:UDPSend):  Started node1
>
> If I ping to the virtual IP from outside, the response goes via virtual IP.
> But if I initiate ping from node1, then it takes the actual (non-virtual
> IP). This is expected since I am not binding to the vip. (ping -I vip works
> fine).
> So my question is, how to pass the virtual IP to my UDPSend OCF agent so
> that it can then bind to the vip? This will ensure that all messages
> initiated by my UDPSend goes from vip.
>
> Out of curiosity, where is this virtual IP stored in the kernel?
> I expected to see a secondary interface ( for e.g. eth0:1) with the vip
> but it isn't there.
>
> -Thanks
> Nikhil
>
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Re: [ClusterLabs] Passing and binding to virtual IP in my service

2016-01-08 Thread Nikhil Utane 
What I had posted earlier was an approach to do N+1 Redundancy for my
use-case (which could be different from yours).
Attaching the same and the cib xml to this thread (Don't know if
attachments are allowed.)
There are some follow-up questions that I am posting on my other thread.
Please check that.

On Fri, Jan 8, 2016 at 1:41 PM, Solutions Solutions 
wrote:

> hi Nikhil,
>  can you send me the N+1 redundancy configuration file,which you posted
> earlier.
>
> On Thu, Jan 7, 2016 at 2:58 PM, Nikhil Utane 
> wrote:
>
>> Hi,
>>
>> I have my cluster up and running just fine. I have a dummy service that
>> sends UDP packets out to another host.
>>
>>  Resource Group: MyGroup
>>  ClusterIP  (ocf::heartbeat:IPaddr2):   Started node1
>>  UDPSend(ocf::nikhil:UDPSend):  Started node1
>>
>> If I ping to the virtual IP from outside, the response goes via virtual
>> IP.
>> But if I initiate ping from node1, then it takes the actual (non-virtual
>> IP). This is expected since I am not binding to the vip. (ping -I vip works
>> fine).
>> So my question is, how to pass the virtual IP to my UDPSend OCF agent so
>> that it can then bind to the vip? This will ensure that all messages
>> initiated by my UDPSend goes from vip.
>>
>> Out of curiosity, where is this virtual IP stored in the kernel?
>> I expected to see a secondary interface ( for e.g. eth0:1) with the vip
>> but it isn't there.
>>
>> -Thanks
>> Nikhil
>>
>> ___
>> Users mailing list: Users@clusterlabs.org
>> http://clusterlabs.org/mailman/listinfo/users
>>
>> Project Home: http://www.clusterlabs.org
>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>> Bugs: http://bugs.clusterlabs.org
>>
>>
>
> ___
> Users mailing list: Users@clusterlabs.org
> http://clusterlabs.org/mailman/listinfo/users
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
>
>


Redundancy using Pacemaker & Corosync-External.docx
Description: MS-Word 2007 document

  

  






  


  

  
  

  
  

  
  
  

  
  


  

  


  
  

  


  


  
  



  


  

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Re: [ClusterLabs] Passing and binding to virtual IP in my service

2016-01-07 Thread Jorge Fábregas 
On 01/07/2016 05:28 AM, Nikhil Utane wrote:
> So my question is, how to pass the virtual IP to my UDPSend OCF agent so
> that it can then bind to the vip? This will ensure that all messages
> initiated by my UDPSend goes from vip.

Hi,

I don't know how ping -I does it (what system call it uses) but I think
you'll have to implement that if you want your program to source
connection from a particular virtual IP.

As far as I know, the way this is usually done these days is by creating
routes.  Something like:

ip route change 192.168.14.0/24 dev eth0 src 192.168.14.4


> Out of curiosity, where is this virtual IP stored in the kernel?
> I expected to see a secondary interface ( for e.g. eth0:1) with the vip
> but it isn't there.

Well, in the old days we used to have a "virtual interface" (eth0:1,
eth0:2 etc) but the proper modern way is to use "virtual addresses"
within a single interface.  The caveat is that you need to use the ip
command to show these virtual addresses (ifconfig is not aware of them):

ip addr show

You'll see there the notion of a primary IP and secondaries.  The system
will initiate connection from the primary by default (unless you specify
a route like the one above).

HTH,
Jorge

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Re: [ClusterLabs] Passing and binding to virtual IP in my service

2016-01-07 Thread Nikhil Utane 
Aah. Got it. Forgot about the ip addr command.
Cool. So now I have the option to bind as well as use route command.
Kristoffer answered about using attribute references so I should be all set.
Thanks Guys.

On Thu, Jan 7, 2016 at 4:12 PM, Jorge Fábregas 
wrote:

> On 01/07/2016 05:28 AM, Nikhil Utane wrote:
> > So my question is, how to pass the virtual IP to my UDPSend OCF agent so
> > that it can then bind to the vip? This will ensure that all messages
> > initiated by my UDPSend goes from vip.
>
> Hi,
>
> I don't know how ping -I does it (what system call it uses) but I think
> you'll have to implement that if you want your program to source
> connection from a particular virtual IP.
>
> As far as I know, the way this is usually done these days is by creating
> routes.  Something like:
>
> ip route change 192.168.14.0/24 dev eth0 src 192.168.14.4
>
>
> > Out of curiosity, where is this virtual IP stored in the kernel?
> > I expected to see a secondary interface ( for e.g. eth0:1) with the vip
> > but it isn't there.
>
> Well, in the old days we used to have a "virtual interface" (eth0:1,
> eth0:2 etc) but the proper modern way is to use "virtual addresses"
> within a single interface.  The caveat is that you need to use the ip
> command to show these virtual addresses (ifconfig is not aware of them):
>
> ip addr show
>
> You'll see there the notion of a primary IP and secondaries.  The system
> will initiate connection from the primary by default (unless you specify
> a route like the one above).
>
> HTH,
> Jorge
>
> ___
> Users mailing list: Users@clusterlabs.org
> http://clusterlabs.org/mailman/listinfo/users
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
>
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