[Users] so, what do you want next in oVirt?

[suporte at logicworks.pt]

Could be great o have on the Engine: 
- An upload option for the ISO files 
- A backup and restore option 
- An high availability for the engine: install the engine on 2 platforms (hardware?), than integrate them for synchronization 

Jose 

----- Original Message -----

From: "noc" <noc at nieuwland.nl> 
Cc: users at ovirt.org 
Sent: Sexta-feira, 6 de Setembro de 2013 10:28:09 
Subject: Re: [Users] so, what do you want next in oVirt? 

On 6-9-2013 10:12, Itamar Heim wrote: 
> On 09/05/2013 10:30 AM, noc wrote: 
>>>> On 08/21/2013 12:11 PM, Itamar Heim wrote: 
>>>>> On 08/21/2013 02:40 AM, Joop van de Wege wrote: 
>>>>>> 
>>>>>> What I would like to see in the ! next version is pxe boot of the 
>>>>>> nodes. 
>>>>>> Probably not easy to achieve because of dependency on dhcp. 
>>>>> 
>>>>> Hi Joop, 
>>>>> 
>>>>> can you please give a bit more information on the use case / how you 
>>>>> envision this? 
>>>>> 
>>>>> current thinking around bare metal provisioning of hosts is to extend 
>>>>> the functionality around the foreman provider for this, but you may 
>>>>> have other suggestions? 
>>>> 
>>>> I think Joop means to be able to add hosts (nodes) to a cluster by 
>>>> adding their MAC address to the dhcp list for PXE boot into ovirt-node 
>>>> and thus join the cluster. This would make it easy to add new physical 
>>>> nodes without any spinning disks or other local storage requirements. 
>>> 
>>> we started adding foreman integration in 3.3: 
>>> http://www.ovirt.org/Features/ForemanIntegration 
>>> 
>>> adding ohad and oved for their thoughts on this. 
>>> 
>>>> 
>>>> I suppose this may not be easy with complex network connections (bonds 
>>>> on mgmt network, mgmt network on a tagged vlan, etc), but it should be 
>>>> possible if the management network interface is plain and physical. 
>>>> 
>>>> /Simon 
>>>> 
>>>> PS, Perhaps Joop can confirm this idea, we've talked about it IRL. 
>>>> _______________________________________________ 
>>>> Users mailing list 
>>>> Users at ovirt.org 
>>>> http://lists.ovirt.org/mailman/listinfo/users 
>>> 
>> This isn't about provisioning with Foreman. Its about having the compute 
>> nodes NOT having any spinning disks. So the only way to start a node is 
>> to pxeboot it and then let it (re)connect with the engine. Then it will 
>> be identified by engine as either a new node or a reconnecting node and 
>> it will get its configuration from the engine. For reference: thats how 
>> VirtualIron works. It has a managment network, just like ovirt, and on 
>> that it runs a tftp and dhcp server. Nodes are plugged into the 
>> managment network, without disk, and then pxe booted after which they 
>> appear in the webui as new unconfigured nodes. You then can set various 
>> settings and upon rebooting the nodes will recieve these settings 
>> because it is recognised by its mac address. The advantage of this 
>> construct is that you can place a new server into a rack, cable it, 
>> power on and go back to you office where you'll find the new node 
>> waiting to be configured. No messing around with CDs to install an OS, 
>> not being in the datacenter for hours on end, just in and out. 
>> 
>> Yes, disks are cheap but they brake down, need maintenance, means 
>> downtime and in general more admin time then when you don't have them. ( 
>> its a shame to have a raid1 of 2 1Tb disk just to install an OS of less 
>> then 10G) 
> 
> just wondering, how do they prevent a rogue node/guest from 
> masquerading as such a host, getting access/secrets/VMs to be launched 
> on such an untrusted node (they could easily report a different mac 
> address if the layer 2 isn't hardened against that)? 
> 
They would need physical access to your rack which ofcourse is locked, 
you would need to powerdown/up which would trigger an alert, switch port 
down/up would trigger an alert, so probably you're notified that 
something not quite right is happening. I haven't gone through the 
source to see if there is more then just the mac address check. 

> other than that, yes. we actually used to have this via the 
> AutoApprovePatterns config option, which would have the engine approve 
> a pending node as it registers (I admit i don't think anyone used this 
> last several years, and it may be totally broken by now). 
> 
> please note this doesn't solve the need for a disk, just the 
> auto-registration part (if it still works) 
What I would like is to have the ovirt Node pxe booting and getting its 
config from engine or autoregister. I know there is a script which 
converts the iso into a huge pxeboot kernel but don't know how to solve 
or if its solved the config part. 

@karli: 
If you run your cluster in Memory Optimization=None then you won't need 
swap. Have been doing that for years and haven't had a single problem 
attributed to that. I just would like to have the choice, pxe boot the 
node and know that you don't have swap. Run with disks if you really 
need overprovisioning. 

Regards, 

Joop 

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