Has been a long time since I wrote on my blog. The paths that life decides for you are strange. Often what you planned is completely scrambled by something bigger and completely unforeseen.

Back in 2018 I planned to relocate to France but the move went quite wrong for reasons that only now I can see clearly.

Anyway, finally after 10 months wandering without a real home I’m finally settled down somewhere.

Then this is is the perfect occasion to celebrate the second database administrators appreciation day.

Back in 2018 I launched the event because there were no day dedicated for this obscure and yet very important figure within the enterprises.

Therefore don’t forget 5th of July, it’s the day when you should say thank you to your DBA for all of the hard work.

In the previous post we modified the apt role for controlling the setup in a declarative way. Then we added a ssh role for configuring the three devuan servers. The role is used to configure the server’s postgres process owner for ssh passwordless connection.

In this tutorial we’ll complete the setup for the postgres user and then we’ll configure the database clusters with a new role.

Today is two years since I started working on pg_chameleon. Back in 2016 this commit changed the project’s license from GPL v2 to the 2 clause BSD and the project’s scope, which became a MySQL to PostgreSQL replica system. Since then I learned a lot of lessons, made several mistakes and worked out solutions which resulted in a decent tool for bridging two different universes. Writing a replica system is a very complex task.

In the previous post we configured three devuan servers from scratch using ansible adding the pgdg repository to the apt sources and installing the PostgreSQL binaries.

This tutorial will revisit the apt role’s configuration and will introduce a new role for configuring the postgres operating system’s user for passwordless ssh connections to each other server.

The ansible is a fictional device invented by Ursula K. Le Guin. The ansible allows fast communication between two points across the space, regardless of the distance.

It doesn’t surprise that the Red Hat’s ansible shares the same name as it gives a simple and efficient way to manage servers and automate tasks, yet remaining very lightweight with minimal requirements on the target machines.