[ovirt-users] Need Advice on Hosted Engine installation

[Daniel Helgenberger]

On 07.06.2015 21:14, wodel youchi wrote:
> Hi,
>
> We are installing a new ovirt platform for a client. this is our first deployment.
>
> we chose Hosted Engine install.
>
> here is the hardware used and the network configuration used be patient :)
>
> We have 02 hypervisors for now.
>
> each sever has 8 nic ports, we will use bonding.
>
> A NAS with nfs4 for the Engine_VM the ISO and Export domains.
>
> And iSCSI SAN for the rest of the VMs (Data domain)
>
> At first we chose as a network configuration:
>
> 10.0.0.X/16 as DMZ (ovirtmgmt will use this network)
>
> 172.16.1/24 as Storage network. we've configured our nfs to export only on this
> network.
>
> -----------------
> We didn't configure the bonding manually at first, we thought that we could do
> it once the engine is up.... we couldn't :-(
This should be strait forward, but it's a little 'ovirt' - just think of 
hierarchical structures; a resqource needs to be on the top level to be 
able to assigned to the lower level.
- Datacenter
   - Cluster
      - Host

I'll walk you through the UI way:

1. In Datacenter Tab / logical networks create all the networks you need 
with VLAN tags and MTU. There should already be a ovrtmgmt network, you 
cannot edit this;

2. In the cluster tab, select a cluster and use 'add networks' in the 
logical networks tab, add the appropriate networks to your cluster. Take 
care to select/deseclect required networks and types there ( eg. vm 
networks). If a host is missing a required network (see next step), it 
will not be able to start VMs.

3. In the hosts Tab select a host, then 'setup host networking'

The rest is quite cool drag and drop stuff: if you need a bond, drag the 
interfaces over each other.
Then, a bridge will be created with dragging the unassigned vlans to an 
interface. There, you can also setup (ipv4 only) networks.
Take care to at least assign all required networks!

select validate and save.

Repeat with the remaining hosts.


>
> for ovirtmgmt, if we create the bond after the engine's installation, we could
> not modify the configuration, error message "network in use"
>
> for the storage network, we could't attach this logical network to the nic used
> for the storage, because when we do that we loose the connexion to nfs for the
> VM engine...
>
> so we had to export the VM engine nfs's share on DMZ and we had to configure
> bonding before starting the hosted engine installation.
>
> We also configured bonding on storage network, but after the engine
> installation, we couldn't attach this bonding to the logical network Storage,
> error message "you have to specify network address if static protocol is used",
> the IP address is specified, it's the IP address of the bonding... :-(
>
> ---------------
> Questions:
>
> - Do we missed anything on network configuration capabilities of ovirt? or the
> hosted engine is really a special case?
> - What is the best way to configure ovirt's Hosted Engine storage?
> - For the rest of the network, do we have to configure bonding and bridging from
> the GUI only? (not manually)
>
> thanks in advance.
>
>
>
>
>
>
>

-- 
Daniel Helgenberger
m box bewegtbild GmbH

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