Questions tagged [proxmox]

Proxmox Virtual Environment (PVE for short) is an Open Source Server Virtualization Platform, based on Debian, KVM and (LXC for v4 and above, OpenVZ for versions <4.0)

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oVirt or Proxmox with Cloudstack

I am using a cloud infrastructure based on XenServer and orchestrated by Cloudstack for lab purposes, and I want to try another KVM hypervisor on the same cloud. Is it possible to use oVirt or Proxmox ...
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Proxmox vps container connection problems

I have Proxmox on my node server which have ip:5.189.190.* and I created openvz container on an ip : 213.136.87.* and installed centos 6 on it The problem: Cann't connect to container ssh directly ...
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Can Proxmox cluster be configured with dedicated nodes at Internet

Is it possible to create a cluster of Proxmox hosts connected through Internet at geographically separate locations?
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“Authentication key already exists” error while adding computer to cluster proxmox

I had 2 computers running proxmox which were set up in a cluster called "cluster1". For simplicity the computers were named computer1 and computer2. computer1 was the primary, and computer2 was added ...
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SFP port in ubiquiti switch says RX Fault

guys, so I recently bought an SFP cable to hook up to my server and my switch (Ubiquiti), but today, when I tried to hook everything up in the unifi controller in the port, I was connecting the SFP, I ...
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Proxmox Active Directory AcceptSecurityContext Error

Overview I'm trying to get Proxmox to perform user authentication via LDAP with a Windows Server 2016 ADDS server. Proxmox is convinced that my credentials are incorrect. Environment Proxmox 6.3-1, ...
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stop IPTABLES from prerouting to local IPs

I'm running a proxmox server and I'm redirecting ports to internal virtual machines via IPTABLES. I'm following instructions here http://www.ameir.net/blog/archives/55-Running-Proxmox-behind-a-single-...
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One LVM for multiple nodes in cluster

We have a cluster with 3 nodes. On one node hard disks have been added and configured as LVM. The idea is to make this LVM also available on the other nodes. Therefore, the other nodes were added to ...
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1answer
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Moving a LVM Partition from Proxmox to VMWare, lvdisplay mapped size changed, why?

This question is "kinda" about Proxmox VM’s but probably more to do with LVM’s I’ll explain. I created a VM on a Promox server with a partition of 20Gb on the local-lvm When I do a lvdisplay I do ...
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Sequential write to zvol is much slower than to a dataset on the same zpool

While experimenting with Proxmox VE, we have encountered a strange performance problem: VM disks can be stored (among other options) as individual raw ZFS zvols, or as qcow2 files on a single common ...
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NFS Server hangs on proxmox

I have a proxmox host running BTRFS. I installed debian 8.4 on my server with BTRFS as root filesystem, and then installed proxmox on top of that. This setup runs fine. Now I'm trying to use this ...
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841 views

Ubuntu 20.04 container failing to startup in Proxmox

Hello I have created a Ubuntu 20.04 and 18.04 container in Proxmox and both return the same error when I try to start them up after creating the container via the Proxmox GUI. They fail to start and ...
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Problems with Debian VM - import ZFS pool state: UNAVAILABLE

I had created RAIDZ1 pool in Proxmox. I had created Ubuntu VM and passed the controller with disks to it. After little while I wanted to try Debian. I had removed the controller from Ubuntu VM without ...
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setting numerical hostname in Proxmox

I am using Proxmox. I tried to run new OpenVZ container and I set my recently registered domain as a hostname in format "three digit number dot ie" (XXX.ie). The problem is, that after starting server,...
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Proxmox private network between KVM and VZ

Sorry for asking this eventually trivial question, but I'm fighting with this for more than a day, and was unable to figure this out by myself so far. Situation Proxmox host running a bunch of ...
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Multi site ceph + proxmox

We have 2 proxmox clusters in production. They contain Ceph cluster with cephfs is on it. The task is to sync files between sites. Site A is master and site B is for backup. On site A cephfs files are ...
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How to change ZFS RAID 1 to RAIDZ-1 (Proxmox)

I have a server using proxmox (6.1) with VM living in a ZFS RAID1 called DATARAID. I have a new hard disk to use there, and I want to expand to RAIDZ-1, that seems to be faster that RAID1 (https://...
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Proxmox. ERROR: Backup of VM failed - CT is locked (backup)

I tried to create backup of the container (LXC) in my Proxmox and I get the error: INFO: starting new backup job: vzdump 206 --node my_server --mode snapshot --storage backups-stor --remove 0 --...
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Monitor ZFS shrink events

I am using ZFS with Proxmox (debian based). The system has enough free RAM but I am close to hitting the point where ARC shrinking could be trigered. I would like to monitor these events, or at least ...
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Proxmox VM Very Slow Performance

I'm new in proxmox, I just installing proxmox on my pc core i5/3.5ghz/15gb/500gb sata And I installing windows 7 with 4gb vram and 4 core proc. But when I trying to console it the response is very ...
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install grub in a usb and boot proxmox from another drive

Good morning my friends! I'm tryng a solution before buy some new hardware. So this is my situation: I have some beautifull hp dl360p gen8 that comes with an p420i hardware raid controller. What ...
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Poor proxmox pveperf performance on a mdadm raid 1

When running pveperf on a Debian + Proxmox PowerEdge R540 server that uses two hard drive in a raid 1 configuration (using mdadm), I get very low performances in the number of FSYNCS/SECOND: $ sudo ...
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PROXMOX rendomly reboots

I have a Proxmox cluster with two physical servers, pve and pve2. They are identical Dell R710s with 96GB of memory and 1TB (RAID-10). For some reason which I have yet to identify, pve2 will power ...
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Proxmox - how to improve low IO performance?

I am extremly surprised with the low IO performance of Proxmox 6.3.3 , which is in the following configuration and the result Image Proxmox 6.3.3 512 GB NVMe SSD Create new VM content windows server ...
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How can i recover deleted pve/data correctly

I accidentally deleted pve/data thin volume in proxmox. Very next second i realised this and i tried to recovering it as below lvremove /dev/pve/data ls -lrt /etc/lvm/archive head /etc/lvm/archive/...
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Migrate VM Proxmox to Vmware

I have a VM on proxmox with a vmdk harddrive on a IDE controller (it's a Windows Server 2019 VM) I want to import the HD into a VM on Vsphere (ESXi 7). I just copy the vmdk into the VM folder of the ...
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FIO Benchmarking - Inconsistent and Slower than Anticipated: Are my RAIDs Misconfigured?

TL;DR: I'm having some performance issues with my hypervisor storage. here are a bunch of test results from fio. Skip to the Results section to read about them and see my questions. Summary I ...
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476 views

Proxmox kills VM when RAM usage grows

I don't know if this stackexchange site is the most suited to my question, please flag this for mods to move the question elsewhere if it isn't. Context & issue I installed Proxmox on a physical ...
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2k views

Proxmox VE (routing and port-fowarding issue)

I have installed PVE, I received three public Ip address two of them are in the same range, the third one is in different range. I wanted to give PVE host one pub IP to be reachable externally, and ...
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Ceph: is setting lower “size” parameter on a live pool possible?

I have a 5-node Proxmox cluster using Ceph as the primary VM storage backend. The Ceph pool is currently configured with a size of 5 (1 data replica per OSD per node) and a min_size of 1. Due to the ...
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Proxmox | /etc/default/pveproxy file

I have a small problem. I was trying to disable access to the proxmox web panel for the ip address and enable it for my domain. As I saw on the proxmox website (https://pve.proxmox.com/pve-docs/...
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QEMU Ubuntu Server 20.04 Initramfs write error

I created a QEMU virtual machine intending to install Ubuntu Server 20.04. The host is a Proxmox 6.x Debian system. The virtual machine parameters are: 2 CPU cores, 1 socket 512 MB ram, ballooning ...
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OVH+Proxmox: How to use packer to build Proxmox image with Fallover IP as DHCP?

I searched entire internet haven't see any solution for it yet. I have a OVH + Proxmox instance. Plan to automatic the launch VM process. I know I can try use cloud-init but since I use Packer + (...
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Proxmox 5.2 Gemini Lake and IGD (graphics) pass through for Ubuntu 18

I’m trying to set up a fresh install of Proxmox 5.2 on Gemini Lake and I would like to configure a VM with IGD (graphics) passthrough for Ubuntu 18 Computer-based on ASRock J4105-ITX asrock.com/mb/...
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VFIO - igpu passthrough on Intel 4770 to a qemu virtual machine (Proxmox)

I am running the latest Proxmox (6.3-3 at this time, fully updated) and attempting to passthrough the onboard GPU on my Core i7 4770 CPU to a Windows 10 VM. I have already enabled iommu on the system ...
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ZFS raidz3 on proxmox having IO issues

I'm running Proxmox 6.2-11 with 256GB ECC RAM and the following raidz3 pool: pool: rpool state: ONLINE scan: scrub repaired 0B in 0 days 15:25:14 with 0 errors on Sun Jan 10 15:49:29 2021 config: ...
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No outgoing pings

I had a problem with the server. The hardware had a problem and broken the system. The system administrators restarted the server in the rescue mode and it never booted again. Proxmox and the virtual ...
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Unable to make work both private and public ip network on openvz container in Proxmox

I'm using Proxmox 3, it is a fresh installation. For those who know, I'm using OVH Vrack 1.5 (along with a previous Vrack 1.0). My server has two interface eth0 and eth1, I succeeded to configure ...
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Can't lock vz with proxmox

I would like to backup my virtual servers to move them away. And when i have started the backup process then i only see this every time: Feb 09 08:40:34 INFO: Starting Backup of VM 101 (openvz) Feb ...
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Alpine setup on virtual machine UEFI does not boot

I am trying to setup Alpine linux on a VM (Proxmox) to replicate the layout of physical hardware (raspberry pi). The real layout is a raspberry pi 3, installed as "data" mode (based on wiki) ...
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How to boot ZFS root filesystem after setting dnodesize = auto (making grub unable to read the disks)

I have a proxmox (v5.4 I think) installation on top of ZFS in a server with 6 disks. There are 2 pools: rpool in a mirror of two SSDs that has the proxmox root filesystem and some containers and zvols....
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4k views

Add a second disk image to a LXC container in Proxmox 4

My LXC containers in Proxmox 4 have a root filesystem stored on the host as a RAW disk image stored in : /var/lib/vz/images/<ct_id>/vm-<ct-id>-disk-1.raw This folder on the host computer ...
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proxmox zfs pool not importing

Today I restarted my proxmox server which has a zfs pool for my data. The zfs pool did not come back up after the restart and is not visible in the proxmox UI. When I try importing the pool manually I ...
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1k views

How can I reconfigure a Linux guest in Proxmox to use a virtio-based HDD instead of IDE?

I'm running Proxmox 3.3.1 to host a virtual machine running Linux (64bit, kernel version 3.2.0). The virtual machine uses a 512GB HDD which was unfortunately configured to use the ide driver when ...
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How to get OS version of proxmox server over command line (cli)?

How do I check what version of Proxmox my server is running? Wikipedia tells me that Proxmox runs on a modified version of Ubuntu LTS It is a Debian-based Linux distribution with a modified Ubuntu ...
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216 views

Proxmox Ceph - Got timeout on separate network

I've installed on 4 nodes a completly fresh OS with Proxmox. Every node has 2xNVMe und 1xHD, one NIC public, one NIC private. On the public network there is an additional wireguard interface running ...
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ZFS inside of virtual machine?

Are there any technical reasons why I shouldn't use ZFS file system inside a VM on a hypervisor on top of hardware RAID? schema.png
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Having some issues with proxmox bridge on Hetzner

So, i'm having 1 main IP and 1 addition IP that I've ordered for the server. Main IP: xxx.xxx.200.200/27 Additional IP: xxx.xxx.202.175/27 This is my bridge configuration: auto lo iface lo inet ...
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Cache configuration for PostgreSQL/TimescaleDB VM on ZFS with proxmox

I have a proxmox cluster of a single node and I want to start a new VM with a PostgreSQL and TimescaleDB and after a lot of reading about how to tune ZFS volumes for this purpose I still have some ...
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Proxmox: Connect VMs in private networks

I want to install VMs with private IPs in my Proxmox Cluster and route traffic between them. Eg: VM1: 192.168.1.10/24 VM2: 192.168.2.10/24 I'm not sure how this is done. Do I need VLANs? How can I ...

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