[pve-devel] Finding VMs by hostname, not id

[Michael Rasmussen]

On Fri, 14 Oct 2016 16:59:52 +0200
Andreas Steinel <a.steinel at gmail.com> wrote:

> On Fri, Oct 14, 2016 at 4:45 PM, Michael Rasmussen <mir at datanom.net> wrote:
> 
> > On Fri, 14 Oct 2016 16:09:48 +0200
> > Andreas Steinel <a.steinel at gmail.com> wrote:
> >  
> > >
> > > How do you guys solve this problem in big environments? Is there a  
> > simpler  
> > > way I don't see right now?
> > >  
> > You could use DHCP assigned IP and a DNS server which automatically
> > adds or removes IP from domain. If some VM's needs static IP this can
> > be handled by DHCP as well.
> >  
> 
> You mean a "self registering dns name"?
> 
See here for an example:
http://askubuntu.com/questions/162265/how-to-setup-dhcp-server-and-dynamic-dns-with-bind
The magic words in DHCP is ddns-updates and ddns-updates on and
ddns-update-style interim

> I'm currently using a solution based on LDAP-backed DNS and DHCP (including
> PXE options). The problem I have is how to "join" the information based on
> IDs in Proxmox VE with the hostname. I can join based on MAC if all
> machines are registered, but not otherwise.
> 
> There was a discussion about getting IP addresses via qemu-agent and
> display it in the Proxmox VE GUI, but that only helps for VMs running with
> the agent. It would be simpler to add - SQL-technically speaking - a
> hostname column to the KVM VMs. I need something to join and the VM name
> can be ambiguous.
> 
> In the end I want to see on the overview page of a VM what the hostname
> and/or IP is for logging in. Currently I did it in the comment.
In the proxmox gui you can assign a MAC yourself which will be the VM's
layer 2 address. The DHCP server can be configured to hand-out specific
IP to specific MAC; a bunch of other options is available like
automatic PXE setup
(https://debian-administration.org/article/478/Setting_up_a_server_for_PXE_network_booting)

-- 
Hilsen/Regards
Michael Rasmussen

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