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I screwed up big time!!!

I screwed up big time!!!

How I Accidentally Nuked My Blog (And What I Learned About Backups) A tale of overconfidence, tiredness, Kubernetes PVs, and a backup strategy that wasn't quite what I thought it was. Spoiler: my blog didn't survive. The Setup: My blog is hosted on a self-managed Ghost

Upgrade or Downgrade K3s

Upgrade or Downgrade K3s

This will be a very short but helpful post. I use k3s on my VPS server because it is a very stable and simple K8s distribution. Upgrading is also very easy. To upgrade to the latest stable release I simply run the command I originally used to install K3s. curl

Cleaning Up My Ceph Cluster with OSD Backfillfull: A Journey to Optimal Performance

Cleaning Up My Ceph Cluster with OSD Backfillfull: A Journey to Optimal Performance

Managing a Ceph cluster can be a complex yet rewarding experience. Recently, I encountered an issue with OSD (Object Storage Daemon) backfillfull, which required immediate attention to ensure the smooth operation of my storage infrastructure. In this blog post, I'll share the steps I took to resolve the

Kolla-Ansible OpenStack 2023.2 released - How to upgrade

Kolla-Ansible OpenStack 2023.2 released - How to upgrade

Beginning of December Kolla-Ansible released their support for OpenStack 2023. (Bobcat). Most notable changes (to me) are: * RabbitMQ quorum queues * These are now enabled by default and I highly recommend using them. Without it you will run into problems if your control node goes down that currently holds the VIP.

Update: Deploying OpenStack with Kolla-Ansible on VMware ESXi using Terraform

Update: Deploying OpenStack with Kolla-Ansible on VMware ESXi using Terraform

It's been quite a while since my last post as I had a lot of stuff to do at my workplace and besides that I studied for VMware VCP-DCV 2023 certification. The learning paid off and I received certification. :) But finally I found some time to enhance my

Velero backup to TrueNAS S3 with free Let's Encrypt certificate

Velero backup to TrueNAS S3 with free Let's Encrypt certificate

In one of my previous blogposts, I explained how to install and configure Velero with TrueNAS as an S3 storage backend. My whole blogpost was focused on running everything on the local network. Since I have my K8s cluster running on a VPS I needed to find a way to

Kolla-Ansible Cinder Containers unhealthy

Kolla-Ansible Cinder Containers unhealthy

I recently replaced all 3 control nodes in my OpenStack cluster and once I replaced the last control node, all of a sudden three of the four Cinder containers became unhealty. Looking at the logs of the cinder_api container revealed the following error: 2023-05-30 21:31:36.350636 Timeout

Deploying VMs in Virtualbox using Terraform Provider terrafarm/virtualbox

Deploying VMs in Virtualbox using Terraform Provider terrafarm/virtualbox

Today I simply wanted to deploy 1-2 VMs in virtualbox using the Terraform provider terrafarm/virtualbox. What should have been very easy turned out to take me around 15-20 minutes to get it finally working. Here is what I had to do on my Windows 10 machine to get it

Deploying OpenStack with Kolla-Ansible on VMware ESXi using Terraform

Deploying OpenStack with Kolla-Ansible on VMware ESXi using Terraform

If you did read one of my very first blog posts about the deployment of OpenStack in my homelab you might want to have a look at this new article, where I will do the same but instead of using Vagrant I will use Terraform. And if you wonder why

Failed to replace a failed disk in TrueNAS Scale - device busy

Failed to replace a failed disk in TrueNAS Scale - device busy

Yes, hard disks do break from time to time. But thanks to ZFS and RAIDZ-1, there is no reason to panic. Or is there? Interestingly the disk was not reported by ZFS to be broken but there was a message in the WebUI indicating that something is wrong. So I

Welcome

Welcome to my "new" blog. Yes, you read correctly "new" blog. I had already started a blog on a very well-known blogging platform, but the totally outdated UI and usability really kept giving me problems. Fortunately, I recently got myself a very cheap VPS and created

Kubernetes Backup with Velero

Kubernetes Backup with Velero

As soon as you have set up your Kubernetes cluster and deployed a few containers, the question arises how to create backups. A very useful and comfortable tool for this is Velero. It can be easily installed via HELM and you can create backups and restores by a two single

Building a more advanced homelab setup with a dedicated server running VMware ESXi

Building a more advanced homelab setup with a dedicated server running VMware ESXi

This article builds on my previous article "Building a minmal homelab on Windows with Virtualbox and Vagrant within minutes". Especially for larger deployments, such as a multinode OpenStack or Kubernetes cluster, the small homelab setup with Virtualbox quickly reaches its limits. In this case, it makes sense to

How to incredibly increase TrueNAS VM NIC throughput

How to incredibly increase TrueNAS VM NIC throughput

I recently replaced my favourite OmniOS VM in my HomeLab with TrueNAS Core. Main reason for this was that I wanted to play around with the very cool VAAI features available in TrueNAS Core. I used VAAI ages ago with a NetApp system and I really liked the fact that

Building a minmal homelab on Windows with Virtualbox and Vagrant within minutes

Building a minmal homelab on Windows with Virtualbox and Vagrant within minutes

18 Dec 2022 • 4 min read If you want to build a flexible and inexpensive homelab and don't want to invest money in an additional server for the time being, then I can only recommend you to use a combination of Oracle Virtualbox and HashiCorp Vagrant. Both tools

How to install and setup TrueNAS Scale or how I replaced my two old Odroid HC2 by a single Odroid H2

How to install and setup TrueNAS Scale or how I replaced my two old Odroid HC2 by a single Odroid H2

It was finally time to replace my two old Odroid HC2s with something newer. I had them both running with a 3.5 inch 2TB hard drive each and they ran really well for a long time. But what never really worked well was ZFS. Who does not know ZFS,

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