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Is that network used by other "services" that might take up all the bandwidth? Prime examples are anything storage related. If the backup target is on that network, that could also be a reason. Can the nodes still ping each other on that network? Best practice is to have multiple Corosync...

As a start: https://pve.proxmox.com/wiki/Migrate_to_Proxmox_VE A Proxmox VE cluster can be managed from the web Ui that is available on each node. If you don't want to cluster them, you will have to wait until we release the first version of the Datacenter Manager to have one interface that...

Via VPN auf die WebUi oder SSH wenn man CLI will :)

Für den root user müsste es root@pam sein, ohne klammern.

SSH geht nur auf die IP, ohne port. Wenn dein Windows Rechner einen SSH Client installiert hat. Ansonsten gibt es Putty :) Direkt an der Konsole der Maschine bedeutet entweder Tastautr & Monitor, oder wenn es ein iLO,iDrac,IPMI,… gibt, darüber, dass Monitor und Tastatur und Maus auch nur über...

Mit dem root user via SSH oder direkt auf der Konsole: pveum user tfa delete {user} Für mehr infos: https://pve.proxmox.com/pve-docs/pveum.1.html

Genau so wie das erste mal. EIn Storage das auf den PBS zeigt einrichten. Dann kannst du das Storage anklicken, dort auf Backups und die Gäste wiederherstellen.

You can use ~500GiB in total if each node only has one OSD. As Ceph will store 3 replicas (1 per node) by default. Therefore, if the nodes have overall a different usable disk space for Ceph, the lowest one will be the limit. This will get more nuanced once you have more than 3 nodes. Or more...

I would be very surprised if a software installation corrupts physical memory. If the memory is faulty, it is more likely a coincidence that it happened some time after installing Proxmox VE on it.

I didn't look too deeply into the bug reports on the Ceph tracker. But overall, if you have the replicas, destroying and creating an OSD is a operation that should be fine. Out of curiosity, what kind of disks are you using for the OSDs?

Das sind so Dinge, die, zumindest bei mir, doch schon recht beleidigend/überheblich/unterstellend rüberkommen. Wenn es nicht so gemeint war, dann tut es mir leid, aber gerade bei schriftlicher Kommunikation ist es schwierig einzuordnen, wie das Gegenüber solche Dinge wirklich meint.

@floh8 egal welcher Meinung man ist, bzw. ob man anderen Meinungen zustimmt oder nicht… Ich bitte dich, bei einem sachlichen Umgangston zu bleiben. Unterstellungen und Beleidigungen bringen die Diskussion nicht weiter und machen nur schlechte Stimmung. Danke :-) Das wäre das ideal, und wenn du...

Check out any Linux guide on how to configure the kernel & bootloader to use the serial port as well. For the kernel, it should be a cmdline parameter. Also check if the BIOS can be configured to be available on the serial port. Then you can follow the whole boot sequence over it.

With the Replication enabled, a (live) migration of a VM between the nodes will be quick as only the latest delta of the disk image needs to be transferred. Therefore, in a maintenance situation, it will be almost as fast as if the disk image would be on a shared/sync storage.

If you only want to use built in options, you could use ZFS for the local storage disks and then use the Replication feature. The downside, this is async replication. The shortest possible interval is 1 minute. You can combine it with HA, but in the worst-case scenario, you might see some small...

First, what about the MONs? That is a bit unclear to me. If you have only one MON left, you need to modify the monmap. Check the mon status first to know what state it is in, https://docs.ceph.com/en/latest/rados/troubleshooting/troubleshooting-mon/#using-the-monitor-s-admin-socket ( and the...

Yeah, those I/O errors do not look good! What kind of SSD were those? What if you reboot the host or put them into another machine? It is likely that the SSDs are dead, but maybe it as something else that causes these I/O errors.

Keep in mind that rules applied on the DC or Node level, apply only to all/specific nodes, not the guests. You will have to add rules/security groups to the guests if they have the firewall enabled.

You could do a test installation with the Proxomx installer and check out the disk layout and all that. If you don't select ZFS, an LVM is used with a few LVs. One for the root FS, and importantly, one that is used for a thin-LVM to have a place for disk images right after the installation. If...

Is there anything in the syslogs around that time regarding the physical disk? Any I/O errors for example? Have you tried (re)starting the OSD services?