[ovirt-users] Hyper converged network setup

Tue Sep 12 21:36:37 UTC 2017

Bharat -

1. Yes. Will need to configure switch port as a trunk and setup your VLANs
and VLAN ID's
2. Yes
3. You can still access the hosts. The engine itself crashing or being down
wont stop your VMs or hosts or anything (unless fencing). You can use virsh
4. My suggestion here is start immediately after a fresh server install and
yum update. Installer does a lot and checks a lot and wont like things: ex
- you setup ovirtmgmt bridged network yourself
5. Yes. See #1, usually what I do is each ovirt node I have I set an IP of
.5, then .6, and so on. This way I can be sure my network itself is working
before adding a VM and attaching that NIC to it

On Tue, Sep 12, 2017 at 4:41 PM, Donny Davis <donny at fortnebula.com> wrote:

> 1. Yes, you can do this
> 2. Yes, In linux it's called bonding and this can be done from the UI
> 3. You can get around using the Engine machine if required with virsh or
> virt-manager - however I would just wait for the manager to migrate and
> start on another host in the cluster
> 4.  The deployment will take care of everything for you. You just need an
> IP
> 5. Yes, you can use vlans or virtual networking(NSXish) called OVS in
> oVirt.
>
> I noticed on your deployment machines 2 and 3 have the same IP. Might want
> to fix that before deploying
>
> Happy trails
> ~D
>
>
> On Tue, Sep 12, 2017 at 2:00 PM, Tailor, Bharat <
> bharat at synergysystemsindia.com> wrote:
>
>> Hi Charles,
>>
>> Thank you so much to share a cool stuff with us.
>>
>> My doubts are still not cleared.
>>
>>
>>    1. What If I have only single Physical network adaptor? Can't I use
>>    it for management network & production network both.
>>    2. If I have two Physical network adaptor, Can I configure NIC
>>    teaming as like Vmware ESXi.
>>    3. What If my ovirt machine fails during production period? In vmware
>>    we can access ESXi hosts and VM without Vcenter and do all the stuffs. Can
>>    we do the same with Ovirt & KVM.
>>    4. To deploy ovirt engine VM, what kind of configuration I'll have to
>>    do on network adaptors? (eg. just configure IP on physical network or have
>>    to create br0 for it.)
>>    5. Can I make multiple VM networks for vlan configuration?
>>
>>
>> Regrards
>> Bharat Kumar
>>
>> G15- Vinayak Nagar complex,Opp.Maa Satiya, ayad
>> Udaipur (Raj.)
>> 313001
>> Mob: +91-9950-9960-25
>>
>>
>>
>>
>>
>> On Tue, Sep 12, 2017 at 9:30 PM, Charles Kozler <ckozleriii at gmail.com>
>> wrote:
>>
>>>
>>> Interestingly enough I literally just went through this same thing with
>>> a slight variation.
>>>
>>> Note to the below: I am not sure if this would be considerd best
>>> practice or good for something long term support but I made due with what I
>>> had
>>>
>>> I had 10Gb cards for my storage network but no 10Gb switch, so I direct
>>> connected them with some fun routing and /etc/hosts settings. I also didnt
>>> want my storage network on a routed network (have firewalls in the way of
>>> VLANs) and I wanted the network separate from my ovirtmgmt - and, as I
>>> said, had no switches for 10Gb. Here is what you need at a bare minimum.
>>> Adapt / change it as you need
>>>
>>> 1 dedicated NIC on each node for ovirtmgmt. Ex: eth0
>>>
>>> 1 dedicated NIC to direct connect node 1 and node 2 - eth1 node1
>>> 1 dedicated NIC to direct connect node 1 and node 3 - eth2 node1
>>>
>>> 1 dedicated NIC to direct connect node 2 and node 1 - eth1 node2
>>> 1 dedicated NIC to direct connect node 2 and node 3 - eth2 node2
>>>
>>> 1 dedicated NIC to direct connect node 3 and node 1 - eth1 node3
>>> 1 dedicated NIC to direct connect node 3 and node 2 - eth2 node3
>>>
>>> You'll need custom routes too:
>>>
>>> Route to node 3 from node 1 via eth2
>>> Route to node 3 from node 2 via eth2
>>> Route to node 2 from node 3 via eth2
>>>
>>> Finally, entries in your /etc/hosts which match to your routes above
>>>
>>> Then, advisably, a dedicated NIC per box for VM network but you can
>>> leverage ovirtmgmt if you are just proofing this out
>>>
>>> At this point if you can reach all of your nodes via this direct connect
>>> IPs then you setup gluster as you normally would referencing your entries
>>> in /etc/hosts when you call "gluster volume create"
>>>
>>> In my setup, as I said, I had 2x 2 port PCIe 10Gb cards per server so I
>>> setup LACP as well as you can see below
>>>
>>> This is what my Frankenstein POC looked like: http://i.imgur.com/iURL9
>>> jv.png
>>>
>>> You can optionally choose to setup this network in ovirt as well (and
>>> add the NICs to each host) but dont configure it as a VM network. Then you
>>> can also, with some other minor tweaks, use these direct connects as
>>> migration networks rather than ovirtmgmt or VM network
>>>
>>> On Tue, Sep 12, 2017 at 9:12 AM, Tailor, Bharat <
>>> bharat at synergysystemsindia.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> I am trying to deploy 3 hosts hyper converged setup.
>>>> I am using Centos and installed KVM on all hosts.
>>>>
>>>> Host-1
>>>> Hostname - test1.localdomain
>>>>  eth0 - 192.168.100.15/24
>>>> GW - 192.168.100.1
>>>>
>>>> Hoat-2
>>>> Hostname - test2.localdomain
>>>> eth0 - 192.168.100.16/24
>>>> GW - 192.168.100.1
>>>>
>>>> Host-3
>>>> Hostname - test3.localdomain
>>>> eth0 - 192.168.100.16/24
>>>> GW - 192.168.100.1
>>>>
>>>> I have created two gluster volume "engine" & "data" with replica 3.
>>>> I have add fqdn entry in /etc/hosts for all host for DNS resolution.
>>>>
>>>> I want to deploy Ovirt engine self hosted OVA to manage all the hosts
>>>> and production VM and my ovirt-engine VM should have HA enabled.
>>>>
>>>> I found multiple docs over internet to deply Self-hosted-engine-ova but
>>>> I don't what kind of network configuration I've to do on Centos network
>>>> card & KVM. As KVM docs suggest that I've to create a bridge network for
>>>> Pnic to Vnic bridge. If I configure a bridge br0 for eth0 bridge that I
>>>> can't see eth0 while deploying ovirt-engine setup at NIC card choice.
>>>>
>>>> Kindly help me to do correct configuration for Centos hosts, KVM &
>>>> ovirt-engine-vm for HA enabled DC.
>>>> Regrards
>>>> Bharat Kumar
>>>>
>>>> G15- Vinayak Nagar complex,Opp.Maa Satiya, ayad
>>>> Udaipur (Raj.)
>>>> 313001
>>>> Mob: +91-9950-9960-25
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>>
>>>
>>
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