I was brought in by a startup to set up their core infrastructure in a way that functioned as needed and could be automated for safe and efficient provisioning and deployment. The key requirement was making RabbitMQ work only with secure certificate-based connections – the AMQPS protocol, rather than AMQP – for security and compliance purposes. This needed to be done within a Kubernetes cluster for storage and shared states via StatefulSets, ease of scaling and deployment, and general flexibility. It was also necessary to set this up on GCP (Google Cloud Platform) as that was already in use by the startup and they didn’t want to consider alternative cloud providers at this stage, so GKE (Google Kubernetes Engine) needed to be used for the Kubernetes cluster.
Getting certificates for use with RabbitMQ within Kubernetes required the setup of cert-manager for certificate management, which in turn needed ingress-nginx to allow incoming connections for Let’s Encrypt verification so that certificates could be issued.
I successfully solved the problems and fulfilled the requirements. It’s still a “work in progress” to some extent. Some of the config is a little “rough and ready” and could be improved with more modularisation and better use of variables and secrets. Also, the initial cluster provisioning is fully automated with Terraform, and the rest is only semi automated currently. So there is room for further improvement.
All the code and documentation is available on my GitHub repository here. Below I will explain the whole process from start to finish.Continue reading “How to automate provisioning and deployment of RabbitMQ with cert-manager on a Kubernetes cluster in GKE within GCP”