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Databases

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

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 I had a look on existing solutions and found only but one which is no longer actively maintained as it seems.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

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

Using etcd as Patroni DCS with the Zalando Postgres Operator

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.

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A pinch of salt – Encrypt WAL-G PostgreSQL backups

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.

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

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?

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

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.

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Backup to S3 – Configure Zalando Postgres Operator Backup with WAL-G

Doing basebackups of Postgres databases enables you to do a Point-in-time recovery (PITR) of your database. Doing backups for your databases that have been deployed using the Zalando Postgres Operator, is a different beast. Here I show you how it’s done with a MinIO (self)hosted S3 compatible Object Storage.

Read More »Backup to S3 – Configure Zalando Postgres Operator Backup with WAL-G