joao@joao-rocha:~$ whoami

João Rocha — DevOps Engineer

DevOps engineer from Portugal. I write about Kubernetes, CI/CD, Docker, self-hosting and homelab infrastructure — practical guides from things I actually run and break.

Read the posts About me LinkedIn

Reduce Memory Usage of Gitlab Server

How I reduced a self-hosted GitLab server's memory usage from 8GB to about 3.6GB by tuning Puma, Sidekiq, Prometheus and swap.

gitlab homelab self-hosted performance

Sep 30, 2025

Migrate GCP CloudSQL Between Projects

How to migrate a Google Cloud SQL database between GCP projects using the Cloud SQL Admin API, since there is no direct Web UI or CLI option.

gcp cloudsql migration database cloud

Jan 12, 2024

Dump and restore Postgres database using Docker

How to dump and restore a PostgreSQL database using Docker containers, without installing Postgres on your machine.

docker postgres database backup

Dec 15, 2023

Configuring S3 backup for Longhorn

A guide on how to configure an S3 backup target (MinIO or Backblaze) for Longhorn on a k3s/Kubernetes cluster.

k3s k8s longhorn backup s3 minio storage

Oct 1, 2023

Docker in WSL 2

A guide on how to install and run Docker natively in WSL 2 on Windows, without Docker Desktop.

wsl2 windows docker linux