https://polymatx.dev/blog/tags/hetzner/Recent content in Hetzner on FaridHugoenMon, 07 Sep 2026 00:00:00 +0000https://polymatx.dev/blog/posts/mongodb-clustering-with-docker/Fri, 04 Sep 2026 00:00:00 +0000https://polymatx.dev/blog/posts/mongodb-clustering-with-docker/<p>I have written about MongoDB clusters twice on this blog — once about the <a href="https://polymatx.dev/blog/posts/mongodb-replica/" >replica set</a> I put into production in 2024, and once about <a href="https://polymatx.dev/blog/posts/mongodb-sharded-cluster-docker/" >sharding it</a> a few months later. Both posts still get read, and readers of one keep ending up stuck on something the other one covers. So this is the version I should have written the first time: one guide, start to finish, that I can hand to a colleague and say &ldquo;do this&rdquo;.</p>https://polymatx.dev/blog/posts/postgres-ha-patroni-hetzner/Fri, 04 Sep 2026 00:00:00 +0000https://polymatx.dev/blog/posts/postgres-ha-patroni-hetzner/<p>This is the procedure I used to move a production billing database from a single server onto a Postgres HA cluster on Hetzner Cloud, written as steps you can follow. Every configuration file below is the one running in production today, with names and secrets replaced and a few tuning parameters trimmed for length. The cluster has been through ten real leader changes since it went live.</p> <p>Stack: PostgreSQL 16.15, Patroni 4.1.5, etcd 3.4.30, PgBouncer 1.25.2, pgBackRest 2.59.1, Ubuntu 24.04, Hetzner Cloud servers, Volumes, Object Storage and a Load Balancer.</p>