[Users] Multicast issue with openvz VMs and CTs

[jjs - mainphrame]

Katran looks interesting, but a little more involved than carp/vrrp.

I'll take a look at this when I get a chance.

Jake

On Wed, Jan 11, 2023 at 12:34 AM Paulo Coghi - Coghi IT <
paulocoghi at gmail.com> wrote:

> Jake, does an L4 load balancer solve the problem?
>
> If yes, maybe Katran could help:
> https://github.com/facebookincubator/katran
>
> On Wed, Jan 11, 2023 at 9:28 AM Paulo Coghi - Coghi IT <
> paulocoghi at gmail.com> wrote:
>
>> Thanks Jake for all the valuable information.
>>
>> I'm following every email.
>>
>> On Tue, Jan 10, 2023 at 5:05 PM jjs - mainphrame <jjs at mainphrame.com>
>> wrote:
>>
>>> To clarify, the openvz guests can receive multicast traffic from the
>>> lan, but they are unable to send multicast traffic to the lan. The
>>> multicast packets are dropped on the way out, somewhere between the guest
>>> adapter and the host bridge.
>>>
>>> I'm not seeing any differences in sysctl settings between the ovz hosts
>>> and the working hosts, so firewall rules are the likely culprit.
>>>
>>> I'll continue to chip away at this as time allows and update with any
>>> findings.
>>>
>>> Jake
>>>
>>>
>>> On Sun, Jan 8, 2023 at 5:08 PM jjs - mainphrame <jjs at mainphrame.com>
>>> wrote:
>>>
>>>> I've been doing some testing with ucarp, in debian VMs and containers.
>>>>
>>>> (ucarp is an implementation of VRRP, a means of providing a highly
>>>> available floating virtual IP within a cluster of machines)
>>>>
>>>> It works fine on proxmox VMs and CTs, and I was hoping to get it
>>>> working on openvz, but so far my attempts to get it fully up and running
>>>> have failed.
>>>>
>>>> Basically, both nodes become master, because neither node is seeing the
>>>> multicast traffic from the other.
>>>>
>>>> What is the secret of allowing multicast traffic to pass from openvz
>>>> VMs and CTs, onto the lan?
>>>>
>>>> Jake
>>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at openvz.org
>>> https://lists.openvz.org/mailman/listinfo/users
>>>
>> _______________________________________________
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>
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