[Gluster-users] Gluster peer probe: why sometimes show host name, sometimes IP address?

[Vijay Bellur]

On 12/16/2013 11:39 AM, Xiao Bin XB Zhang wrote:
> We have a small glusterFS environment, when we setup this, and run
> gluster peer probe,
> some nodes are shown as host name, while others are showing IP address,
>
> in our deployment environment, we have DSN setup, so every host name can
> be correctly resolved to IP address,
>
> but still strange that some host shown as host name, while others shown
> as IP address,
>

Terminology:

probing node - node that initiates the probe operation
probed node  - node that is being added to the cluster

gluster peer probe is an unidirectional operation. When a new node is 
probed with its hostname, the probing node knows about the hostname of 
the probed node and adds that to its database. However the probed node 
gets to see only the probing node's IP address from the network 
connection. Hence it records only the IP address in its database. To 
overwrite IP address with hostname, another peer probe operation with 
hostname of the probing node can be done from the probed node.

-Vijay