[DRBD-user] Linstor | changing cluster's interface ip addresses

[Yannis Milios]

Many thanks, this is going to be a very useful option...

Yannis



On Mon, 20 Aug 2018 at 17:27, Robert Altnoeder <robert.altnoeder at linbit.com>
wrote:

> On 08/20/2018 05:19 PM, Yannis Milios wrote:
> > Quick question. I noticed the following command in Linstor:
> >
> > 'linstor node interface modify'
> >
> > By using this command someone can modify the network interface/ip
> > address that Linstor is listening on.
> >
> > Let's assume that we have already created a 3 node DRBD/Linstor
> > cluster in the ip range 10.10.10.0/24 <http://10.10.10.0/24>, and
> > later on we decide to move to different (faster) network interfaces
> > within the ip range of 10.10.20.0/24 <http://10.10.20.0/24>.
> >
> > Will such scenario be possible with Linstor, *without* recreating the
> > whole cluster ?
>
> Yes.
>
> It is not well-tested yet, but that is the intention behind it. The
> details are a bit more complex (e.g., the controller can select the
> network interface that it uses for communication with the satellite, and
> that can be a different one than those used for connecting DRBD
> resources, etc...).
>
> I have used this command in the past to change resource configurations
> from Ethernet to Infiniband, from IPv4 to IPv6, etc., so that's all
> supposed to work.
>
> > Will the above command also update drbd resource configuration files
> > to the new ip addresses *without* the need to re-create them ?
>
> Yes
>
> br,
> Robert
>
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