The HashiCorp Nomad and Kubernetes logos, connected with an arrow pointing from Nomad to Kubernetes

Nomad to k8s, Part 7: Ansible Plays for Host Updates

Wherein I add the Kubernetes nodes to my host update Ansible playbook. This is part eight of my k8s migration series. With the number of hosts I’ve now got in my Homelab, I definitely need a better way to update them than manually SSH’ing into each. So a while ago, I created an Ansible playbook to update all hosts in my Homelab. These updates are also one of the reasons I keep so many physical hosts, even if they’re individually relatively small: I want an environment where I can take down any given host for updates without anything at all breaking, and especially without having to take the entire lab down before a regular host update....

February 17, 2024 · 10 min · Michael
The HashiCorp Nomad and Kubernetes logos, connected with an arrow pointing from Nomad to Kubernetes

Nomad to k8s, Part 6: Logging with FluentD, Fluentbit and Loki

Wherein I document how I migrated my logging setup from Nomad to k8s. This is part seven of my k8s migration series. Setup overview Let’s start with an overview of the setup. Overview of my logging pipeline. It all starts out with the app’s logs. Those are output to stdout in the container. Then, my container runtime, cri-o, takes that and writes it to files in /var/log/containers/ by default. It also prefixes the log line with the timestamp, the stream it was coming from, and F for full log lines as well as P for partial log lines....

February 13, 2024 · 30 min · Michael
The HashiCorp Nomad and Kubernetes logos, connected with an arrow pointing from Nomad to Kubernetes

Nomad to k8s, Part 2b: Asymmetric Routing

Wherein I ran into some problems with the Cilium BGP routing and firewalls on my OPNsense box. This is the second addendum for Cilium load balancing in my k8s migration series. While working on my S3 bucket migration, I ran into several rather weird problems. After switching my internal wiki over to using the Ceph RGW S3 from my k8s Ceph Rook cluster, I found that the final upload of the generated site to the S3 bucket from which it was served did not work, even though I had all the necessary firewall rules configured....

February 4, 2024 · 10 min · Michael
The HashiCorp Nomad and Kubernetes logos, connected with an arrow pointing from Nomad to Kubernetes

Nomad to k8s, Part 5: Non-service S3 Buckets

Wherein I document how I migrated some S3 buckets over to the Ceph Rook cluster and with that, made it load-bearing. This is part six of my k8s migration series. So why write a post about migrating S3 buckets, and why do it at this point of the Nomad -> k8s migration? In short, it just fit in here very well. I already planned to make Ceph Rook one of the first services to set up anyway....

January 25, 2024 · 21 min · Michael

PG Autoscaling in Ceph Rook

While working on some internal documentation of my Rook Ceph setup, I found that my pool’s Placement Groups were still at size 1, even though I had transferred about 350GB of data already. I have the PG Autoscaler enabled by default on all pools, so I won’t have to have an eye on the PG counts. But for some reason, scaling wasn’t happening. Digging into the issue, I finally found the following log lines in the MGR logs:...

January 21, 2024 · 5 min · Michael