Hi Eneko, On Mon, Jul 5, 2021 at 2:30 PM Eneko Lacunza via pve-user < [email protected]> wrote:
> > > > ---------- Forwarded message ---------- > From: Eneko Lacunza <[email protected]> > To: [email protected] > Cc: > Bcc: > Date: Mon, 5 Jul 2021 13:30:41 +0200 > Subject: Re: [PVE-User] Proxmox Fencing > Hi Alex, > > El 5/7/21 a las 13:18, Alex K escribió: > > Hi all, > > > > I'm new to proxmox and trying to setup a 2 + 1 node active/active HA > > cluster on top glusterfs using latest community > pve-manager/6.4-4/337d6701 > > (running kernel: 5.4.106-1-pve). The third node is used for gluster > > arbitration and perhaps I have to configure in it a quorum disk also to > > keep quorum in case of a node failure (not clear yet at my mind, still > > reading the docs). > If you have 3 nodes, you want all them in Proxmox cluster for proper > quorum majority. No need for quorum disk that way. (note that I don't > know how gluster works). > Gluser has a similar concept for quorum so as to keep writes on the storage. Hence I am placing a third node in the setup. Due to cost limitations, the third node has minimal specs and is not meant to host VMs. It is a mini-PC thats why I did not add it as a proxmox host. I am wondering if it is possible to add it as a proxmox host and put a constraint to avoid VMs migrating into it. In this way I will achieve the required quorum levels without adding a full spec host. > I am stuck at the moment at the fencing part of the setup. Reading through > > the docs it seems that I have only the option to setup hardware watchdog > > fencing. I would expect to be able to use external media such as IPMI, > > iDrac, HP iLO or UPS based power management (APC) though I can't find any > > info how these are configured at current version of Proxmox. > Currently by default Proxmox uses a software watchdog. I'm not sure if > hardware watchdog support was introduced, others may help with this. > According to the docs it seems there is hardware watchdog option: https://pve.proxmox.com/pve-docs/chapter-ha-manager.html Q+++ hardware watchdog - if not available we fall back to the linux kernel software watchdog (softdog) +++Q > > In case of a network partition and not a node hardware issue, how is the > > watchdog going to behave? Is a healthy but disconnected node going to be > > power cycled? I will soon proceed with testing as soon as I manage to > setup > > fencing though I wanted to better understand this part of fencing. > > The node that drops out of quorum will be rebooted. If there where > CM/CTs configured for HA in that node, Proxmox will attempt to restart > them in another node. > So soft-fencing is done from ha-manager? How are the other nodes notified that the rebooted host is indeed rebooted so as to start the HA VMs? Thanx for the feedback > Cheers > > Eneko Lacunza > Zuzendari teknikoa | Director técnico > Binovo IT Human Project > > Tel. +34 943 569 206 | https://www.binovo.es > Astigarragako Bidea, 2 - 2º izda. Oficina 10-11, 20180 Oiartzun > > https://www.youtube.com/user/CANALBINOVO > https://www.linkedin.com/company/37269706/ > > > > > > ---------- Forwarded message ---------- > From: Eneko Lacunza via pve-user <[email protected]> > To: [email protected] > Cc: Eneko Lacunza <[email protected]> > Bcc: > Date: Mon, 5 Jul 2021 13:30:41 +0200 > Subject: Re: [PVE-User] Proxmox Fencing > _______________________________________________ > pve-user mailing list > [email protected] > https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user > _______________________________________________ pve-user mailing list [email protected] https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user
