I had a random thought today, triggered, by all things, by a short training on Reduce, Reuse, Recycle at work. This is the principle of first looking for the potential to not produce anything. Then to look for a new use for something old that has already been manufactured. And only then, as a final step, to recycle the thing. I, and probably many other Homelabbers, have quite a bit of older hardware laying around....
This is the next post in the Current Homelab series, where I give an overview of what my lab is currently looking like. This time, I will be talking about my storage layer, which is mostly made up of Ceph. I chose Ceph around spring 2021, when I decided to go from a baremetal+docker-compose setup to a VM based setup with LXD. At the time, my main storage consisted of a pair of WD Red 4TB disks for my main storage requirements, and a 60GB crucial SATA SSD for my server’s root FS....
In the course of spreading my homelab over a couple more machines, I finally arrived at the Ceph cluster’s MON daemons. These were running on three Ceph VMs on my main x86 server up to now. In this post, I will describe how I moved them to three Raspberry Pis. While the cluster was up the entire time. First, a couple of considerations: MON daemons use on average about 1GB of memory in my cluster My cluster, and most of my services, went down during the migration....
Today, I wanted to migrate my single Ceph NFS daemon from my LXD VM on an x86 server to my Hardkernel H3. This did not work out too well. Yesterday, I had finally finished the migration of my Ceph cluster’s MON daemons to my three Raspberry Pi controllers. This move had it’s own problems, which I will detail a bit in another blog entry. Part of this migration was to also move over the MGR daemons to my Pis....