[pve-devel] corosync bug: cluster break after 1 node clean shutdown

[Alexandre DERUMIER]

Also, I wonder if it could be possible to not use watchdog fencing at all (as option),

if cluster use only shared storages with native disk lock/reservation.

Like ceph rbd for example, with exclusive-lock, you can't write from 2 clients on same rbd,
so ha will not be able to start qemu on another node.


 

----- Mail original -----
De: "aderumier" <aderumier at odiso.com>
À: "dietmar" <dietmar at proxmox.com>
Cc: "Proxmox VE development discussion" <pve-devel at lists.proxmox.com>, "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Dimanche 6 Septembre 2020 07:36:10
Objet: Re: [pve-devel] corosync bug: cluster break after 1 node clean shutdown

>>But the pve logs look ok, and there is no indication 
>>that we stopped updating the watchdog. So why did the 
>>watchdog trigger? Maybe an IPMI bug? 

do you mean an ipmi bug on all 13 servers at the same time ? 
(I also have 2 supermicro servers in this cluster, but they use same ipmi watchdog driver. (ipmi_watchdog) 



I had same kind of with bug once (when stopping a server), on another cluster, 6 months ago. 
This was without HA, but different version of corosync, and that time, I was really seeing quorum split in the corosync logs of the servers. 


I'll try to reproduce with a virtual cluster with 14 nodes (don't have enough hardware) 


Could I be a bug in proxmox HA code, where watchdog is not resetted by LRM anymore? 

----- Mail original ----- 
De: "dietmar" <dietmar at proxmox.com> 
À: "aderumier" <aderumier at odiso.com> 
Cc: "Proxmox VE development discussion" <pve-devel at lists.proxmox.com>, "pve-devel" <pve-devel at pve.proxmox.com> 
Envoyé: Dimanche 6 Septembre 2020 06:21:55 
Objet: Re: [pve-devel] corosync bug: cluster break after 1 node clean shutdown 

> >>So you are using ipmi hardware watchdog? 
> 
> yes, I'm using dell idrac ipmi card watchdog 

But the pve logs look ok, and there is no indication 
that we stopped updating the watchdog. So why did the 
watchdog trigger? Maybe an IPMI bug? 


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