[PVE-User] Cluster network via directly connected interfaces?
Frank Thommen
frank.thommen at uni-heidelberg.de
Thu Nov 22 19:55:28 CET 2018
Good point. Thanks a lot
frank
On 11/22/2018 07:51 PM, Uwe Sauter wrote:
> FYI:
>
> I had such a thing working. What you need to keep in mind is that you
> should configure both interfaces per host on the same (software) bridge
> and keep STP on… that way when you loose the link from node A to node B
> the traffic will be going through node C.
>
> +--------------------+
> | |
> | Node A br0 |
> | / \ |
> | eth0 eth1 |
> +------/-----------\-+
> / \
> +----/------+ +-----\----+
> | eth1 | | eth0 |
> | / | | \ |
> | br0--eth0-----eth1--br0 |
> | Node B | | Node C |
> +-----------+ +----------+
>
>
>
>
> Am 22.11.18 um 19:42 schrieb Frank Thommen:
>> What I /really/ meant was "but the throughput would /not/ be higher
>> when using a switch"...
>>
>>
>> On 11/22/2018 07:37 PM, Frank Thommen wrote:
>>> But the throughput would be higher when using a switch, would it?
>>> It's still just 1Gbit
>>>
>>> frank
>>>
>>>
>>> On 11/22/2018 07:34 PM, Mark Schouten wrote:
>>>> Other than limited throughput, I can’t think of a problem. But
>>>> limited throughput might cause unforeseen situations.
>>>>
>>>> Mark Schouten
>>>>
>>>>> Op 22 nov. 2018 om 19:30 heeft Frank Thommen
>>>>> <frank.thommen at uni-heidelberg.de> het volgende geschreven:
>>>>>
>>>>> Please excuse, if this is too basic, but after reading
>>>>> https://pve.proxmox.com/wiki/Cluster_Manager I wondered, if the
>>>>> cluster/corosync network could be built by directly connected
>>>>> network interfaces. I.e not like this:
>>>>>
>>>>> +-------+
>>>>> | pve01 |----------+
>>>>> +-------+ |
>>>>> |
>>>>> +-------+ +----------------+
>>>>> | pve02 |-----| network switch |
>>>>> +-------+ +----------------+
>>>>> |
>>>>> +-------+ |
>>>>> | pve03 |----------+
>>>>> +-------+
>>>>>
>>>>>
>>>>> but like this:
>>>>>
>>>>> +-------+
>>>>> | pve01 |---+
>>>>> +-------+ |
>>>>> | |
>>>>> +-------+ |
>>>>> | pve02 | |
>>>>> +-------+ |
>>>>> | |
>>>>> +-------+ |
>>>>> | pve03 |---+
>>>>> +-------+
>>>>>
>>>>> (all connections 1Gbit, there are currently not plans to extend
>>>>> over three nodes)
>>>>>
>>>>> I can't see any drawback in that solution. It would remove one
>>>>> layer of hardware dependency and potential spof (the switch). If
>>>>> we don't trust the interfaces, we might be able to configure a
>>>>> second network with the three remaining interfaces.
>>>>>
>>>>> Is such a "direct-connection" topology feasible? Recommended?
>>>>> Strictly not recommended?
>>>>>
>>>>> I am currently just planning and thinking and there is no cluster
>>>>> (or even a PROXMOX server) in place.
>>>>>
>>>>> Cheers
>>>>> frank
>>>>> _______________________________________________
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>>>>> pve-user at pve.proxmox.com
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>>
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