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question about failback

 

 

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dorfman.eli at gmail

Aug 23, 2009, 2:27 AM

Post #1 of 5 (768 views)
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question about failback

Hi,

I have configured 'auto_failback off' in /etc/ha.d/ha.cf and testing the following:

1. Node A is master and Node B is standby
2. Power off Node A
3. Node B becomes master
4. Node A powered on
5. Node A becomes master again - all resources failback from B to A

The preferred node in /etc/ha.d/haresources is A, but still I would expect that B will not failback to A.
In /etc/ha.d/ha.cf it says that:
# auto_failback: determines whether a resource will
# automatically fail back to its "primary" node, or remain
# on whatever node is serving it until that node fails, or
# an administrator intervenes.

Is it the expected behavior?

Eli
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Kay.Groening at siemens

Aug 25, 2009, 5:55 AM

Post #2 of 5 (710 views)
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Re: question about failback [In reply to]

Hello Eli,

> Subject: [Linux-HA] question about failback
>
> Hi,
>
> I have configured 'auto_failback off' in /etc/ha.d/ha.cf and
> testing the following:
>
> 1. Node A is master and Node B is standby
> 2. Power off Node A
> 3. Node B becomes master
> 4. Node A powered on
> 5. Node A becomes master again - all resources failback from B to A

try to set "Default Resource Stickiness" to INFINITY.
The Application will stay on one Node until the Node fails.

Greetings
Kay
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timothy.carr at foxtrail

Aug 25, 2009, 6:08 AM

Post #3 of 5 (707 views)
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Re: question about failback [In reply to]

Comes up with Multi-running and restarts all the services again .. but on
the same node.



On Tue, Aug 25, 2009 at 2:55 PM, Groening, Kay <Kay.Groening [at] siemens>wrote:

> Hello Eli,
>
> > Subject: [Linux-HA] question about failback
> >
> > Hi,
> >
> > I have configured 'auto_failback off' in /etc/ha.d/ha.cf and
> > testing the following:
> >
> > 1. Node A is master and Node B is standby
> > 2. Power off Node A
> > 3. Node B becomes master
> > 4. Node A powered on
> > 5. Node A becomes master again - all resources failback from B to A
>
> try to set "Default Resource Stickiness" to INFINITY.
> The Application will stay on one Node until the Node fails.
>
> Greetings
> Kay
> _______________________________________________
> Linux-HA mailing list
> Linux-HA [at] lists
> http://lists.linux-ha.org/mailman/listinfo/linux-ha
> See also: http://linux-ha.org/ReportingProblems
>



--
Timothy Carr
Technical Specialist
University of Cape Town
Cell: +27834572568
Fax: +27865472190
Gtalk: timothy.carr [at] foxtrail
Skype: timothy.carr.foxtrail
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andrew at beekhof

Aug 25, 2009, 8:03 AM

Post #4 of 5 (708 views)
Permalink
Re: question about failback [In reply to]

On Tue, Aug 25, 2009 at 3:08 PM, Timothy
Carr<timothy.carr [at] foxtrail> wrote:
> Comes up with Multi-running and restarts all the services again .. but on
> the same node.

In that case, more than likely, your RA is broken.


> On Tue, Aug 25, 2009 at 2:55 PM, Groening, Kay <Kay.Groening [at] siemens>wrote:
>
>> Hello Eli,
>>
>> > Subject: [Linux-HA] question about failback
>> >
>> > Hi,
>> >
>> > I have configured 'auto_failback off' in /etc/ha.d/ha.cf and
>> > testing the following:
>> >
>> > 1. Node A is master and Node B is standby
>> > 2. Power off Node A
>> > 3. Node B becomes master
>> > 4. Node A powered on
>> > 5. Node A becomes master again - all resources failback from B to A
>>
>> try to set "Default Resource Stickiness" to INFINITY.
>> The Application will stay on one Node until the Node fails.
>>
>> Greetings
>> Kay
>> _______________________________________________
>> Linux-HA mailing list
>> Linux-HA [at] lists
>> http://lists.linux-ha.org/mailman/listinfo/linux-ha
>> See also: http://linux-ha.org/ReportingProblems
>>
>
>
>
> --
> Timothy Carr
> Technical Specialist
> University of Cape Town
> Cell: +27834572568
> Fax: +27865472190
> Gtalk: timothy.carr [at] foxtrail
> Skype: timothy.carr.foxtrail
> _______________________________________________
> Linux-HA mailing list
> Linux-HA [at] lists
> http://lists.linux-ha.org/mailman/listinfo/linux-ha
> See also: http://linux-ha.org/ReportingProblems
>
_______________________________________________
Linux-HA mailing list
Linux-HA [at] lists
http://lists.linux-ha.org/mailman/listinfo/linux-ha
See also: http://linux-ha.org/ReportingProblems


dorfman.eli at gmail

Aug 26, 2009, 6:13 AM

Post #5 of 5 (694 views)
Permalink
Re: question about failback [In reply to]

Groening, Kay wrote:
> Hello Eli,
>
>> Subject: [Linux-HA] question about failback
>>
>> Hi,
>>
>> I have configured 'auto_failback off' in /etc/ha.d/ha.cf and
>> testing the following:
>>
>> 1. Node A is master and Node B is standby
>> 2. Power off Node A
>> 3. Node B becomes master
>> 4. Node A powered on
>> 5. Node A becomes master again - all resources failback from B to A
>
> try to set "Default Resource Stickiness" to INFINITY.
> The Application will stay on one Node until the Node fails.

I forgot to mention but we are using HA v.1
Is it configurable there as well?
Is this the expected behavior(see above scenario) when auto_failback is off?

Thanks,
Eli

>
> Greetings
> Kay
> _______________________________________________
> Linux-HA mailing list
> Linux-HA [at] lists
> http://lists.linux-ha.org/mailman/listinfo/linux-ha
> See also: http://linux-ha.org/ReportingProblems

_______________________________________________
Linux-HA mailing list
Linux-HA [at] lists
http://lists.linux-ha.org/mailman/listinfo/linux-ha
See also: http://linux-ha.org/ReportingProblems

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