On Wed, Feb 26, 2020 at 10:16 AM Gianluca Cecchi <[email protected]>
wrote:
> Hello,
> I have an environment with oVirt 4.3.8.
> All seems ok from a configuration point of view, but if I use OVN based
> interfaces on two VMs, they are not able to ping, both if I put them on the
> same host and if I put on different hosts.
> At this point they are both running on the same host and their only vnic
> is on ovn172 network (defined as 192.168.172.0/24).
>
Did the VMs got an IP address via DHCP from OVN?
Can you please create a new OVN network with port security disabled and try
again?
Was the openvswitch or ovn package upgraded during the update?
> I have this
>
> manager
> # ovn-nbctl show
> switch fc2fc4e8-ff71-4ec3-ba03-536a870cd483
> (ovirt-ovn192-1e252228-ade7-47c8-acda-5209be358fcf)
> switch 87012fa6-ffaa-4fb0-bd91-b3eb7c0a2fc1
> (ovirt-ovn193-d43a7928-0dc8-49d3-8755-5d766dff821a)
> port 8141047d-10c0-41f6-bedc-130552a115ef
> addresses: ["00:1a:4a:17:01:54 dynamic"]
> port 90559419-cb8e-45ae-ad61-6c16c4aff598
> addresses: ["00:1a:4a:17:01:52 dynamic"]
> port b3db190f-086a-4c79-99a0-77f811f66c80
> addresses: ["00:1a:4a:17:01:53 dynamic"]
> switch 9e77163a-c4e4-4abf-a554-0388e6b5e4ce
> (ovirt-ovn172-4ac7ba24-aad5-432d-b1d2-672eaeea7d63)
> port 3641cae4-18df-4fba-a2bd-7b0c60a87162
> addresses: ["00:1a:4a:19:01:59 dynamic"]
> port aaddc425-3a38-49bf-bfc7-9eaeab82906e
> addresses: ["00:1a:4a:19:01:58 dynamic"]
>
> The two macs correspond to what I see for VMs in web admin gui and at os
> level of the two VMs.
>
> On the host where VMs are running I have:
> # ovs-vsctl show
> f1a41e9c-16fb-4aa2-a386-2f366ade4d3c
> Bridge br-int
> fail_mode: secure
> Port "ovn-b8872a-0"
> Interface "ovn-b8872a-0"
> type: geneve
> options: {csum="true", key=flow, remote_ip="10.4.192.34"}
> Port br-int
> Interface br-int
> type: internal
> Port "vnet0"
> Interface "vnet0"
> Port "ovn-1dce5b-0"
> Interface "ovn-1dce5b-0"
> type: geneve
> options: {csum="true", key=flow, remote_ip="10.4.192.32"}
> Port "vnet1"
> Interface "vnet1"
> ovs_version: "2.11.0"
>
> So apparently I see the vnet0 and vnet1 ports associated with the two VMs
> How can I check more in depth the reason why they don't ping?
>
If OVN would be unhappy, there would be an hint in
/var/log/openvswitch/*.log .
If the VMs get an IP address via DHCP, OVN should be fine.
In this case we have to check if we blocked by traffic in an unintended way.
> Both VMs are CentOS 8.1 but I don't know if it is relevant.
>
> Thanks,
> Gianluca
>
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