[ClusterLabs] Cluster IP that "supports" two subnets !?

Zarko Dudic zarko.dudic at oracle.com
Tue Jan 9 01:04:59 EST 2018

Kristoffer, thanks a lot


Yes, I'll have to investigate and learn more about dnsupdate, thanks for 
the suggestion.

On 1/8/2018 7:29 PM, Kristoffer Grönlund wrote:
> Zarko Dudic <zarko.dudic at oracle.com> writes:
>> Hi there, I'd like to setup a cluster, with two nodes, but on two
>> different sub-nets (nodes are in two different cities). Notes are
>> running Oracle Linux 7.4 and so far I have both them running and cluster
>> software have been installed and configured.
>> Well, next is to add a resources and I'd like to start with ClusterIP,
>> and seems it's straightforward if nodes are on same subnet, which is not
>> my case. First of all is it possible to accomplish what I want, and if
>> yes, I'd appreciate to hear some suggestions. Thanks a lot.
> Hi,
> I'm not sure I understand the question so my answer may be off the
> mark.
> An IP address is intrinsically part of a particular subnet, so how would
> managing an IP address across separate subnets work? Or do you mean to
> manage an IP address from a third subnet mapped to both locations? This
> second option is indeed possible using the regular IP resources, it is
> more of a network setup problem.
> Another option would be to manage DNS records across subnets. This is
> possible using the dnsupdate resource.
> Yet a third option would be to access the resources through a proxy, but
> then availability is of course limited to the availability of the
> proxy and network between proxy and the active site.
> Cheers,
> Kristoffer
>> -- 
>> Thanks,
>> Zarko
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