Some time ago I had to install and setup a PostgreSQL cluster for a very critical application, an Warehouse Management System (WMS) developed internally for an ecommerce startup in which I worked. I would like to share the steps I followed back in those days to setup the proper configuration, I have to say that … Continue reading Physical replication in PostgreSQL 10 on GNU/Linux
Category: Debian GNU/Linux
Provision VMs on KVM with Terraform
Some months ago I attended to a talk in which it was explained how to provision infrastructure in AWS with Terraform, I was talking with @raularanda (the host of that talk) about the idea of making a lab similar but with KVM, this entry it's the result of that conversation. Terraform is a software which … Continue reading Provision VMs on KVM with Terraform
Installing K3s on Debian Buster with Multipass
In this quick entry I'm just going to play with Multipass and K3s on my Debian box because I read a couple of articles about multipass and I want to give it a try. First of all what is Multipass? According to this page it is a tool to launch and manage VMs on Windows, … Continue reading Installing K3s on Debian Buster with Multipass
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
Wireless bridge on KVM
In one of my previous articles I described how to install and setup a basic K8s cluster on Debian GNU/Linux, regarding network configuration I followed a very standard configuration attaching ethernet NIC to a bridge, but recently I required to connect my VMs just using my wireless card, and I would like to explain the … Continue reading Wireless bridge on KVM
Solving T470p jack not working problem on Debian GNU/Linux Bullseye
Some days ago I started to have problems when I connect my headphones to my jack port, after reading some forums about this issue and make some fail tests I could find a procedure which works in my case, these are the instructions I followed. First of all let's get some information about our audio … Continue reading Solving T470p jack not working problem on Debian GNU/Linux Bullseye
Installing a K8s cluster on Debian Bullseye with KVM
Five years ago I wrote this blog entry talking about KVM, at that time I needed to run Microsft Windows 7 VM to make some tests for my work. This time I need to make a lab with a couple of VMs to run a Kubernetes cluster in my laptop and I've decided to use … Continue reading Installing a K8s cluster on Debian Bullseye with KVM
Fixing problems with bluetooth on Thinkpad T470p
Trying to connect my bluetooth headphones I realize that I had a problem in my laptop, checking logs it shown the problem:The device installed on Thinkpad T470p is Intel 8265 Wireless Bluetooth. ... [ 7.726547] Bluetooth: hci0: Debug lock is disabled [ 7.726549] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 [ 7.726564] bluetooth … Continue reading Fixing problems with bluetooth on Thinkpad T470p
Problems creating a new RAID array on Debian GNU/Linux Bullseye
A quick entry to remember a problem which I found creating a new RAID array on my Debian box. 1. This is not a problem is just a reminder: when you create a partition in a hard drive with a GPT label you need to setup as partition type 29 (Linux RAID) instead of partition … Continue reading Problems creating a new RAID array on Debian GNU/Linux Bullseye
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)
