k8s

CSI Synology – Using Synology CSI driver in Kubernetes to do snapshots

TheDatabaseMe
8. September 20238. September 2023

Kubernetes established it’s so called Container Storage Interface (CSI) to enable storage vendors to build a plugin, so that their storage plays nicely with Kubernetes and the vendor specific features (like snapshots) can be used on a Kubernetes cluster. Lately, I found out, that Synology provides an open source CSI driver which can do online volume resizes, snapshots and so on. So, I tried it out.

Ingress detected – Configure Ingress for Postgres on Kubernetes

TheDatabaseMe
25. May 202325. May 2023

You want to have a proper ingress handling for your Postgres databases running on Kubernetes? With external DNS registration and signed certificates? Then you’re absolutely right here.

Get me those metrics – Use Prometheus WAL-G backup exporter

TheDatabaseMe
7. May 2023

Since I rely heavily on the Zalando Spilo image as Postgres setup in my Kubernetes Homelab, I wanted to have those WAL-G backups that I make also within my Prometheus / Grafana setup. I had a look on existing solutions and found only but one which is no longer actively maintained as it seems. So I took this Prometheus WAL-G metric exporter written in Python, and made it working for me. I want to show you, how I use it as a sidecar on my Spilo Postgres pods and what is the outcome of it.

Using etcd as Patroni DCS with the Zalando Postgres Operator

TheDatabaseMe
28. March 202328. April 2023

Patroni is a reliable cluster software for Postgres which, when running on Kubernetes, can use the Kubernetes API itself as DCS (Distributed Config Store). This is very nice, but on Kubernetes clusters with an unreliable API / Controlplane, this can lead to demotion of your cluster leader and thereby unhappy users. Gladly, Patroni supports other setups as DCS like etcd.

Dip it – Deploy Apache Guacamole on Kubernetes

TheDatabaseMe
13. November 20229. December 2022
3 Comments

With Apache Guacamole, you can use all kind of different remote desktop protocols (like SSH, VNC, RDP) to access your remote machines. Guacamole can run fine on Docker, but it’s a bit tricky to deploy on a Kubernetes environment. I haven’t found an existing deployment for the current version of Guacamole, so I decided to create my own.

SHORTY – Add binaries to a Kubernetes Pod using an Init container

TheDatabaseMe
18. October 202212. December 2022

In this short article, I want to show you, how you easily can “inject” binaries to a Kubernetes Pod / Container, without building your own customized image for it. We can do so by using Init-Containers.

Let loose the squid – Deploy ArgoCD the declarative way

TheDatabaseMe
5. June 20225. June 2022

ArgoCD is a GitOps tool for Kubernetes. What this means and how it works to get Argo deployed on your Kubernetes cluster, that the topic of this article.

Bastard Operator from Hell? – Giving the Kubernetes Oracle Database Operator a try

TheDatabaseMe
21. May 202221. May 2022
1 Comment

Oracle want’s to participate in the open source movement lately, making itself known as “an Open Source company”. Part of this is the Oracle Database Operator for Kubernetes. It’s an early version (0.1.0) that I’ve tested out, so it offers only a limited set of features as of now. Let’s move it to it’s paces, shall we?

Restore and Clone from S3 – Configure Zalando Postgres Operator Restore with WAL-G

TheDatabaseMe
3. May 202219. May 2023
39 Comments

In an earlier blogpost, I wrote about doing Postgres backups using WAL-G to a S3 storage. This time we have a look to either clone or “inplace” restore a postgres instance from these backups. All of this using the Zalando Postgres Operator. If you haven’t done so, please read the backup post before proceeding reading this one.