[CentOS-virt] Live migration using shared storage in different networks

[Alvin Starr]

A couple of comments.

Take a look at http://whiteboxswitch.com/ or do a general search for 
white box switches.


Migration will work so long as the storage is consistent between the two 
KVM hosts.
If there is buffering or caching going on you could have problems.
Something like GFS or NFS will work.
I have used DRBD to setup a simple 2 node system and migration works 
quite nicely.

Take a look at ProxMox or some of the postings on alteeve.ca.
A good place to start would be
https://alteeve.ca/w/2-Node_Red_Hat_KVM_Cluster_Tutorial


On 07/06/2015 07:58 AM, Miguel Barbosa Gonçalves wrote:
> Hi!
>
> I am building a KVM cluster that needs VM live migration.
>
> My shared storage as well as the KVM hosts will be running
> CentOS.
>
> Because 10 Gbps Ethernet switches are very expensive at the
> moment I will connect the KVM hosts to the storage by
> cross-over cables and create private networks for each
> connection (10.0.0.0/30 and 10.0.0.4/30).
>
> The following diagram shows the topology
>
>   Management             Management            Management
>      VLAN                   VLAN                  VLAN
>       |                      |                     |
> +----+-----+  10 Gbps  +----+----+  10 Gbps  +----+-----+
> | KVM Host |-----------| Storage |-----------| KVM Host |
> +----+-----+           +----+----+           +----+-----+
>       |                      |                     |
>     Public                 Public                Public
>      VLAN                   VLAN                  VLAN
>
> My question is: will live migration work in this configuration
> since the storage will have 2 different IP addresses
> (10.0.0.1 and 10.0.0.5) in 2 different networks even though
> it is the same storage?
>
> Thanks!
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> http://lists.centos.org/mailman/listinfo/centos-virt


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