https://raymii.org/s/tags/virtualization.xml RSS feed for tag virtualization on Raymii.org https://raymii.org/s/tutorials/Finally_run_Docker_containers_natively_in_Proxmox_9.1.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/Finally_run_Docker_containers_natively_in_Proxmox_9.1.html Proxmox VE is a virtualization platform, like VMWare, but open source, based on Debian. It can run KVM virtual machines and Linux Containers (LXC). I've been using it for over 10 years, the [first article I wrote mentioning it was in 2012](/s/tags/proxmox.html). At home I have a 2 node Proxmox VE cluster consisting of 2 HP EliteDesk Mini machines, both running with 16 GB RAM and both an NVMe and SATA SSD with ZFS on root (256 GB). It's small enough (physically) and is just enough for my homelab needs specs wise. Proxmox VE 9.1 was released [recently](https://www.proxmox.com/en/about/company-details/press-releases/proxmox-virtual-environment-9-1) and this new version is able to run Docker containers / OCI images natively, no more hacks or VM's required to run docker. This post shows you how to run a simple container from a docker image. Thu, 20 Nov 2025 22:34:00 GMT Thu, 20 Nov 2025 22:34:00 GMT https://raymii.org/s/tutorials/Proxmox_VE_7_Corosync_QDevice_in_Docker.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/Proxmox_VE_7_Corosync_QDevice_in_Docker.html At home I have a 2 node Proxmox VE cluster consisting of 2 HP EliteDesk Mini machines, both running with 16 GB RAM and both an NVMe and SATA SSD with ZFS on root (256 GB). It's small enough (physically) and is just enough for my homelab needs specs wise. Proxmox VE has support for clustering. For a cluster (in any sense of the word), you need at least 3 nodes, otherwise there is no quorum. Corosync, the cluster software used by Proxmox, supports an external Quorum device. This is a small piece of software running on a third node which provides an extra vote for the quorum. In my case I wanted to run this on my NAS, since (physical) space is a premium. The NAS supports Docker, this guide explains how to run the QDevice for Proxmox VE 7 in a Docker container. There is a qdevice Docker image on the Docker hub but that guide does not work for Proxmox VE 7 and requires a lot of manual setup. Using my method involves a lot less steps, since you're basically running an extra debian VPS (a container with systemd and openssh). Sun, 17 Apr 2022 00:00:00 GMT Mon, 29 Jan 2024 04:30:00 GMT https://raymii.org/s/software/OpenVZ_Proxmox_-_pre-backup_all_container_dump_script.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/software/OpenVZ_Proxmox_-_pre-backup_all_container_dump_script.html This simple script creates a vzdump of all the OpenVZ containers on a machine. It can be used before an actual backup, in my case the actual backup excludes the container path /var/lib/vz/private. This because a dump is easier to backup because it has much less files in it. Sun, 18 Jan 2015 00:00:00 GMT Sun, 18 Jan 2015 00:00:00 GMT https://raymii.org/s/tutorials/OpenVZ_Proxmox_Container_to_Template.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/OpenVZ_Proxmox_Container_to_Template.html This guide will show you how to convert an OpenVZ (Proxmox) container to a template. You can then use this template on any other OpenVZ (or proxmox) host. This can be used either to migrate containers or to create a kind of master image to deploy new hosts from. Fri, 11 Jul 2014 00:00:00 GMT Fri, 11 Jul 2014 00:00:00 GMT https://raymii.org/s/tutorials/Proxmox_VE_One_Public_IP.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/Proxmox_VE_One_Public_IP.html This guide will show you how to set up Proxmox with only one public IP. We will configure an extra interface bridge and make sure VM traffic is NATed. I have a few dedicated servers, some run Proxmox. Most of them however have only a few IP's. Therefore the VM's in proxmox cannot all have a public IP. For most of them that is not a problem. If needed I run a proxy or set up iptables to forward ports to the VM's. Thu, 10 Jul 2014 00:00:00 GMT Thu, 10 Jul 2014 00:00:00 GMT https://raymii.org/s/tutorials/KVM_add_disk_image_or_swap_image_to_virtual_machine_with_virsh.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/KVM_add_disk_image_or_swap_image_to_virtual_machine_with_virsh.html This tutorial shows you how to create and add a disk image to a KVM vm using virsh. This is useful when you for example want to expand the disk space of your virtual machine when it is using LVM, or if you want to add a swap disk to a virtual machine. Sun, 23 Feb 2014 00:00:00 GMT Sun, 23 Feb 2014 00:00:00 GMT https://raymii.org/s/tutorials/KVM_convert_qcow2_disk_images_to_raw_disk_images_for_performance.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/KVM_convert_qcow2_disk_images_to_raw_disk_images_for_performance.html This tutorial shows you how to convert KVM qcow2 disk images to raw disk images. The qcow2 disk format has some decent features like encryption, compression and copy to write support. However, the compression and the copy processes make it quite a bit slower than raw disk images. Sometimes you want to convert the disk images so that the VM will perform better. Sun, 16 Feb 2014 00:00:00 GMT Sun, 16 Feb 2014 00:00:00 GMT https://raymii.org/s/tutorials/KVM_with_bonding_and_VLAN_tagging_setup_on_Ubuntu_12.04.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/KVM_with_bonding_and_VLAN_tagging_setup_on_Ubuntu_12.04.html This tutorial shows you how to setup Ubuntu 12.04 as a KVM host with multiple virtual machines. The kvm host will have VM's in multiple VLAN's and will handle the VLAN tagging over a bonded interface. It also covers creation of an example virtual machine with the ubuntu vmbuilder tool and shows you how to add a serial console to an ubuntu 12.04 virtual machine for troubleshooting. Sat, 15 Feb 2014 00:00:00 GMT Sat, 15 Feb 2014 00:00:00 GMT https://raymii.org/s/tutorials/VMWare_vCenter_Appliance_Install_Extra_Software.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/VMWare_vCenter_Appliance_Install_Extra_Software.html This tutorial shows you how to install extra software in the VMWare vCenter appliance (VCSA). VMWare provides a vCenter appliance, which is a SUSE Linux Enterprise Server appliance with the VMWare vCenter server software installed. Because this is SUSE, we can add repositories and install software from there. By default it comes without repositories enabled. I needed to do this because I want to use NRPE on the vCenter appliance. Wed, 05 Feb 2014 00:00:00 GMT Wed, 05 Feb 2014 00:00:00 GMT https://raymii.org/s/snippets/OpenVZ_dnsmasq_set_capabilities_failed_fix.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/snippets/OpenVZ_dnsmasq_set_capabilities_failed_fix.html When running dnsmasq under OpenVZ I sometimes get an error when restarting: set capabilities failed. This is because dnsmasq starts as root, then does privileged stuff and then drops to the configured run user. In OpenVZ these permissions are not passed to the VPS, sadly. These three commands fix the problem. Wed, 14 Aug 2013 00:00:00 GMT Wed, 14 Aug 2013 00:00:00 GMT https://raymii.org/s/software/ProxBash.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/software/ProxBash.html ProxMox VE is a very nice piece of software to setup a VM host very fast, which also is easy manageable via a webinterface. It supports both OpenVZ and KVM. I use it to manage a few VM's to test stuff on and it works really great. However, I'm a command line lover, and I thought it would be nice to be able to 'Manage' Proxmox VE from a bash shell. And I've written a script to do just that. Thu, 28 Jun 2012 00:00:00 GMT Thu, 28 Jun 2012 00:00:00 GMT