Create a KVM template to K8s clusters based on Debian GNU/Linux Buster

VM logical volume Let's create the volume group to store logical volumes to our templates: # fdisk -l /dev/sda ... /dev/sda4 351645696 468860927 117215232 55.9G 8e Linux LVM # pvcreate /dev/sda4 ... Physical volume "/dev/sda4" successfully created. # vgcreate vg-kvm /dev/sda4 Volume group "vg-kvm" successfully created # pvs PV VG Fmt Attr PSize PFree /dev/nvme0n1p5 … Continue reading Create a KVM template to K8s clusters based on Debian GNU/Linux Buster →

RAID array migration from CentOS 7 to Debian GNU/Linux 10 (upgrading drives)

After installing Debian GNU/Linux Testing (Bullseye) on my HP Proliant G8 Microserver in a new SSD drive, I have to setup an already created RAID array on my new fresh Linux installation and upgrade disks in that array at the same time, these are the steps which I followed: Scan RAID arrays # mdadm --detail … Continue reading RAID array migration from CentOS 7 to Debian GNU/Linux 10 (upgrading drives) →

Fixing time out waiting for LVM2 devices booting CentOS 7

After my last system update I started to experiment troubles in the booting process, my server couldn't to finish the process with any of kernel images installed on CentOS. I checked booting with the rescue image which hadn't problems detecting LVM2 devices but appeared the same time out with RAID device. Fortunately the rescue image … Continue reading Fixing time out waiting for LVM2 devices booting CentOS 7 →

Set up RAID 1 (Mirroring) on CentOS 7

This entry explains steps which I followed to set up storage to BackupPC software. Obviously the right choice to set up storage settings depends on your hardware and your needs. In my case I decided to use my HP ProLiant MicroServer Gen8 G1610T as my backup server and I wanted to be safe enough to … Continue reading Set up RAID 1 (Mirroring) on CentOS 7 →