[Linux-cluster] rhcs doubts.

[James Parsons]

Allyson - Listas wrote:

> Lon Hohberger wrote:
>
>> On Tue, 2006-03-14 at 15:27 -0300, Allyson - Listas wrote:
>>  
>>
>>> Hi guys,
>>>
>>> I'm new at redhat cluster suite.  Could Anybody help me in some 
>>> questions?
>>>
>>> 1st) I installed rhcs on 2 virtual machines and create a new 
>>> cluster, setup a manual fence, a failvoer domain, create a IP 
>>> resource and a service that uses just that IP for tests. Well, I'd 
>>> like to know how can I force a failover of the service between 
>>> nodes. This option is not available at system-config-cluster that 
>>> allow just disable and enable the service.     
>>
>>
>> Drag it to the other node in the gui.
>>  
>>
>    -->  I couldn't find this option at gui, but i find how to do it at 
> command line.. 

Just grab the service you want to move in the management view, and drag 
it to the node you want it to run on in the upper half of the GUI. :-)

-j

>
> [root at cs02 /]# clustat
> Member Status: Quorate
>
>  Member Name                              Status
>  ------ ----                              ------
>  cs01.example.com                         Online, rgmanager
>  cs02.example.com                         Online, Local, rgmanager
>
>  Service Name         Owner (Last)                   State
>  ------- ----         ----- ------                   -----
>  vip50                cs02.example.com               started
>  oracle-ha-fs         cs02.example.com               started
> [root at cs02 /]# clusvcadm -r oracle-ha-fs -m cs01.example.com
> Trying to relocate oracle-ha-fs to cs01.example.com...success
> [root at cs02 /]# clusvcadm -r vip50 -m cs01.example.com
> Trying to relocate vip50 to cs01.example.com...success
> [root at cs02 /]# clustat
> Member Status: Quorate
>
>  Member Name                              Status
>  ------ ----                              ------
>  cs01.example.com                         Online, rgmanager
>  cs02.example.com                         Online, Local, rgmanager
>
>  Service Name         Owner (Last)                   State
>  ------- ----         ----- ------                   -----
>  vip50                cs01.example.com               started
>  oracle-ha-fs         cs01.example.com               started
>
>>
>>  
>>
>>> I noticed that the ip service created is not a virtual interface 
>>> like eth0:1, but it was working because I could ping it, Is it Normal?
>>>   
>>
>>
>> Yes, try "/sbin/ip addr list", which is noted in the documentation.
>>
>>
>>  
>>
> tks
>
>>> 2nd) What is the real fuction of a fence device?
>>>   
>>
>>
>> Prevent data corruption in the event of a live-hang of a node with
>> outstanding dirty buffers.
>>
>>
>>  
>>
>>> 3rd) How can I setup a quorum device, and isn't necessary for a 
>>> failover service?  I read that it was needed at rhel3 but at rhel4 
>>> is not anymore, could you explain me that.
>>>   
>>
>>
>> What do you need to know?  It's not needed because of the way CMAN
>> recovers - see
>>
>> http://people.redhat.com/teigland/sca.pdf
>>
>> -- Lon
>>
>> -- 
>> Linux-cluster mailing list
>> Linux-cluster at redhat.com
>> https://www.redhat.com/mailman/listinfo/linux-cluster
>>
>>  
>>
>
>