Celil Buğra Karacan

That gent who is’t doest not checketh on his coff’rs shalt loseth his apples! TL;DR: I want (opensource) bare-metal backups of virtualization cluster nodes There is Clonezilla, and I had written about it before. There also is a server edition, which makes deploying a single image to multiple computers faster. But, it was hard to install for me. More importantly, not cut for my needs. FOG Project on the other hand has:...

TL;DR: Scripted away Clonezilla interactions to blindly backup and then restore Proxmox VE disk image, as wanted to move Ryzen 5850X PVE node onto faster NVMe SSD in an automated way. I can finally get to compiling that KVM-enabled LineageOS kernel for the coming post. There will be plenty of screenshots, but they are stashed at the end. Acquiring ocs-sr commands Clonezilla has ocs-sr programme to do its bidding. By default users interact with the Clonezilla TUI to provide their desired operation....

I had some spare parts and wanted to setup a Proxmox Backup Server for my 3-node ceph-enabled cluster. It didn’t go strictly as planned, but I found a way to ditch GPUs on my nodes, which then turned out to be too good to be true. Now, here I am with extra NICs and fancy names returned by ip addr. Lemons -> Lemonade WoL, How? As of now, my cluster is tethered only to a power outlet with a wireless network uplink....

I am late to the party! But hey, each to their own… My archaic plan of getting fluent in plantUML has failed, mermaid.js.org should do. To be honest, if I had known early on that diagrams.net had plantUML insertion capability, then I might have stuck to it. I also came across D2, but I do not need server-side image generation just yet. Until then mermaid’s ubiquity wins. So an example is placed below to ensure mermaid integration on my blog blocks Gitlab Pages pipeline....

TL;DR: This is a guide on running 64-bit ARM operating systems on Proxmox (amd64) via emulation. Although cloudinit is the charm in here, an ordinary ISO mount for manually installing an OS works as well. This guide assumes previous experience in setting up a VM on Proxmox VE Web UI and acquaintance with CLI. Following are the steps taken in an ordered list. Terminal use is minimal, however, checkout Techno Tim’s Notes and Proxmox VE documentation for terminal use for creating and modifying a VM....

Another short one. After sourcing some almost-dead second-hand enterprise SSDs and crimping some short ethernet cables, I can migrate VMs and CTs at will or with HA policy. Homelab 2.0 is here. ASCII diagram: Below diagram does not show corona/internet NIC. Below is only CEPH related, physically closed loop network. 1 2 3 4 5 6 7 8 9 10 11 +------+ +------+ +------+ | | | | | | ###[0]### | ###[0]### | ###[0]### | # # | # # | # # | # pve # | # pve # | # pve # | # 1 # | # 2 # | # 3 # | # # | # # | # # | ###[1]### | ###[1]### | ###[1]### | T | T | T | | +------+ +------+ | +----------------------------------+ End result: Proxmox has a Full Mesh - Routed (Simple) example for IPv4, here is my IPv6 version....

TL;DR: Adventure of reviving a CPU as a hypervisor About few months ago, I found a bargain on a seemingly faulty Ryzen R9 5900X unit. Stangely enough, it was said to drop internet connectivity while gaming. Long story short, there are 2 defective physical cores out of the 12 present. I ended up isolating them with isolcpus= kernel parameter within boot menu. Methodology: Video recording of the process. Includes temporary solution for GRUB2 (see /etc/default/grub or /etc/kernel/cmdline for proxmox sysboot for persistence), an example of OS installation failure without modification, and a test example....

dmacvicar’s libvirt provider is already in the official registry. Yet, I indend to contribute functionalities, which I would like to use in my homelab. This post is the progressive summary of the process. Development setup Set the environment: 1 2 mkdir -p ~/GitRepos mkdir -p ~/terraform.d/plugins/local-registry/cbugk/libvirt/0.7.0/linux_amd64 For installing terrraform and the initial provider test Fabian Lee’s introduction was followed. His main.tf file: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 terraform { required_version = ">= 1....

Why exactly? I wanted to have duos (dual-boot) of Windows and Fedora on my “server”. However, I don’t want to reboot every five minutes unlike the olden days. I also wanted to game natively on this system. One could run a VM under KVM and setup PCIe passthrough for peripherals and I intend to set it up and try gaming modest titles once my new GPU arrives. But there is another orthogonal way of solving this, booting the same disk both as bare-metal and as VM....

Edited: 2022-06-30, added capability to block multiple subnets. First things first! 1 2 mkdir -p ~/Bench/libvirt-nwfilter-test cd ~/Bench/libvirt-nwfilter-test Preface Until I learn how to tame VXLAN for a virtualization cluster, I need a dirty way of seperating infrastructure network and the VM network. The solution presented in this post is to apply libvirt’s network filters (nwfilter) to drop packages from and to the “uplink”, namely home LAN (10.0.0.0/18), for any guest connected to the NAT (192....