Kubernetes

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.

Handle this – PostgreSQL PgBouncer setup with Zalando Postgres Operator

TheDatabaseMe
2. July 20232. July 2023

The Zalando Postgres Operator has a built in possibility to maintain a PgBoucer setup for your Postgres cluster. But what is PgBouncer and why should… Read More »Handle this – PostgreSQL PgBouncer setup with Zalando Postgres Operator

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 I had a look on existing solutions and found only but one which is no longer actively maintained as it seems.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.

A pinch of salt – Encrypt WAL-G PostgreSQL backups

TheDatabaseMe
19. February 202319. February 2023

WAL-G is a widely known backup software for Postgres databases. One of it’s features is to backup to S3 storage out of the box. Also it’s capable to encrypt those backups and WAL archives with several encryption methods (e.g. libsodium). Since WAL-G is implemented within the Zalanndo Spilo image and therefore deployed by default with the Zalando Postgres Operator on Kubernetes, I had a deeper look on how to get encrypted backups implemented there, cause this is not documented well.

Enhanced with plugins – Make ArgoCD more powerful with plugins running as sidecar

TheDatabaseMe
2. December 20228. February 2023

The power of ArgoCD can be enhanced by the use of so called plugins. A plugin will operate during a refresh operation. It has access to the checked out repository and may manipulate data before syncing it to your Kubernetes clusters. I use it for encrypt my git-crypt encrypted repositories, before manifests will get applied to my Kubernetes cluster.

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.