High availability

High Availability and Hierarchical Federation with Prometheus

Learn about Prometheus and how to setup high availability and federation.

AWS re:Invent day 4 – Network & Resilience hub

Of course today’s highlight was Werner Vogels’ keynote with is amazing presentation skills and some great announcements. You will for sure you will find plenty of articles about it.On my side I will rather focus on 2 thematics which are(…)

AWS re:Invent day 3 – Gray failures mitigation

So again during the 3rd day of the re:Invent 2022 there were plenty of interesting information to take with us. However, the most interesting part was for sure the workshop about gray failures and how to mitigate them in a(…)

Recreate a Patroni replica using pgBackRest

In my last blog we had a look on how to bootstrap a complete Patroni Cluster from pgBackRest. But there is also the possibility to recreate only one Patroni node using pgBackRest. In this blog we(…)

How to upgrade Patroni

It's been a while since I wrote the blog post about PostgreSQL 13 and Patroni 2.0. On this blog I received a comment, if it's possible to explain, how to upgrade from Patroni 1.6 to 2.

How to setup a Consul Cluster on RHEL 8, Rocky Linux 8, AlmaLinux 8 part 2

Within the first part I have described the setup of Consul as replacement for ETCD. Here now the setup ob keepalived, haproxy and patroni. The needed packages I have installed within the first part, so let’s start with the(…)

How to setup a Consul Cluster on RHEL 8, Rocky Linux 8, AlmaLinux 8 part 1

This blog describes the setup of a Consul Cluster on RHEL 8 and clones, it will be the base for a Patroni HA setup using RPM Packages from postgresql.org. Many Patroni setups are using ETCD, but ETCD is not(…)

Running two Patroni on one host using an existing etcd

Have you ever asked yourself, how to create a second Patroni PostgreSQL cluster on an existing server using the existing etcd? My first idea was to study the documentation of Patroni, but unfortunately without big(…)

Patroni 2.0: New features – Patroni on pure Raft

Last week the new Patroni 2.0 release was published which brings many new features. But one makes me absolutely curious. At the moment only as BETA, but I had to test it. Patroni on pure Raft. It's possible to run(…)

Setup a two node Postgres HA Cluster using EDB Advanced Server and EFM

Some time ago I had a customer looking for a two node PostgreSQL Master/Replica solution. As we need Oracle compatibility in a later step, we decided to go with the EnterpriseDB tools. This article should give you an introduction on(…)