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    zfs best practices: 36x 6tb hdd + enterprise nvme

    Hello together, there are a lot of posts here about ZFS, which makes it a bit difficult to compress the needed information. Therefore a simple "best practice" queestion to the experienced ZFS admins: I have two Adaptec 6805 raid servers with 36x 6TB HDDs each and would like to enable HBA...
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    Ceph Cluster different OSD sizes - performance/issues expected?

    Hi, Can I expect degraded performance or other issues if my CEPH cluster contains different sizes, e.g. 50x 3840GB Kingston DC1500M, and 50x7680GB Kingston DC1500M SSDs distributed over 5 nodes?
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    CEPH multiple MDS on the same node

    Hi, I am running a 5-node ceph cluster (Octopus) and when I increased the number of active MDs from 2 to 4 I experienced a gain of performance in my CephFS. Since I have a lot of client using the cephfs pool I think it might be a good idea to increase the number of MDs even more...
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    CephFS user/permission conflict between different nodes (best practices?)

    Hi, we are using CephFS on a 3-node proxmox cluster. We have mounted the CephFS to /home on several different Debian clients. All Debian clients (server) see the files of the other Debian clients in the cephfs mount (/home). It happens that client XY has services on Debian client 1 and Debian...
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    CEPH pool without replication?

    Hi, is it possible to create a CEPH pool that does not replicate and where I have 100% of the storage available? We are talking about temporary data that is unimportant and may be lost. Setting a pool with size/min to 1/1 does not mean that it does not replicate. Hence the question.
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    New Cluster: [TOTEM ] FAILED TO RECEIVE after 4mins.

    Hi, I setup a new cluster of 4 nodes. Exact 4mins. after I restarted corosync, the cluster becomes unquorate. One node seems to form a new corosync ring and the other 3 nodes still have their old corosync ring. Those 3 nodes are still working fine, only the one nodes leavs the ring. Syslog...
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    two corosync rings?

    Hi, I saw it is possible to setup two different rings in proxmox. What is the advantage to do so? Is the second ring a failover ring if the first ring becomes slow or unavailable?
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    CephFS trough Proxmox GUI - No VM storage possible?

    Hi, I setup CephFS trough proxmox GUI successfully. Everything looks good but I can't allow disk images on that storage: http://prntscr.com/nv9v87 Isn't it possible to store VMs on CephFS?
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    How to delete "CephFS"?

    Hi, I am currently playing around with CEPH. Configured it via proxmox gui, added some osds, added a Metadata Server and finally created "CephFS" in the "CephFS" tab: http://prntscr.com/nuzcyd Unter "Storages" (proxmox cluster) I accidently deleted the CephFS storage. When I try to create it...
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    Move proxmox to another disk

    Hi, we have a Cluster with some nodes. All nodes have a 2TB local disk where proxmox is installed (with its LV). The other space is allocated as ext4 directory storage. I would like to move the OS to a new 60 gb ssd without losing any VPS information. Means the vps stay on their ext4 directory...
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    Windows KVM freezes - qmp socket - timeout after 599 retries

    Hi, we are facing issues on all KVM VMs (qcow2, VirtIO SCSI, DIR storage (ext4)) for months now. These VMs freeze suddenly. Means we are unable to access by RDP or even by Console (VNC). Syslog shows after crash. Stopping the frozen VM and trying to start them again lead to: There is still a...
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    node in cluster "red", 100% pmxcfs process

    Hi, we have one node in our cluster what becomes "red" every 1-3 days. Can't open "summary" or "system" then. We see a 100% pmxcfs process and need to restart the whole node to fix the issue temporarily. Syslog: Any ideas?
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    Some cluster nodes "grey", "System" hangs up (Loading)

    Hi, i have some issues with my cluster. This morning it was totally RIP due to a hardware failure of two nodes. It took some time to get everything sorted. Now, everything is green (27 nodes) except 4 nodes. They are grey. pvecm status looks fine. When I click on "sumary", everything looks...
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    cluster hangs on /etc/pve figure out what node causes it

    Hi, from time to time our whole cluster wents grey and "df -h" stucks right before /etc/pve. It takes us hours to figure out what node is causing it. Mostly by connecting to every node and stop corosync / pve-cluster there. Is there a way to figure out the hanging node trough a log file?
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    TASK ERROR: start failed: org.freedesktop.systemd1.UnitExists: Unit scope already exists.

    Hi, we have a big problem with our Proxmox cluster. The cluster consists of 25 nodes with 10-50 servers each (LXC & KVM). It happens 20-30 times a day that KVM servers freeze. The console is then not reachable and the server itself is also not. When we stop the server, Proxmox displays...
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    VNC: Failed to connect to server from different ndoe

    Hi, we have a cluster of 20 nodes. VNC is working fine on all nodes, except on one. When we try to access the "console" of any VM on that problematical node FROM a different node, we keep getting "Failed to connect to server". But when we open the GUI of the problematical node and try to open...
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    MariaDB not working on Debian 9 LXC

    Hi, when I try to install MariaDB on a Debian 9 LXC container (template downloaded from proxmox) I keep getting: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2 "No such file or directory") Check this: https://prnt.sc/n8d21e...
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    Cloud-init Ubuntu 18.04 - netplan v2

    Hi, I am playing arround with Cloud-Init to setup Ubuntu 18.04 VMs: - Hostname - User password change - disk resize works fine so far, but I do not get a static IP configured. I figured out, Ubuntu is using Netplan v2 and Proxmox does not Support netplan v2, right? Any ideas on how to achieve...
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    SolusVM (.raw) to Proxmox mgirate (.qcow2)

    Hi, we tried to migrate a SolusVM KVM VPS (Win2016) in raw format to Proxmox qcow2. We used following command to convert the image: When I try to start a KVM VPS in proxmox with this converted qcow2 file, I get "inaccessable boot device" (Windows Bluescreen) after a while trying to load...
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    KVM server freezes, then refuses to start org.freedesktop.systemd1.UnitExists: Unit 1011790.scope al

    Hi, we are facing issues for some time now, where KVM servers suddenly freeze. We need to stop them trough proxmox and then try to start them again, but it immediately says: any ideas?

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