João Rocha is a DevOps engineer from Portugal writing about Kubernetes, CI/CD, self-hosting, homelab and cloud infrastructure.https://joao-rocha.com/enhttps://joao-rocha.com/posts/gitlab-reduce-memory-usage/https://joao-rocha.com/posts/gitlab-reduce-memory-usage/How I reduced a self-hosted GitLab server's memory usage from 8GB to about 3.6GB by tuning Puma, Sidekiq, Prometheus and swap.Tue, 30 Sep 2025 00:00:00 GMTgitlabhomelabself-hostedperformancehttps://joao-rocha.com/posts/gcp-migrate-cloudsql-between-projects/https://joao-rocha.com/posts/gcp-migrate-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.Tue, 30 Sep 2025 00:00:00 GMTgcpcloudsqlmigrationdatabasecloudhttps://joao-rocha.com/posts/dump-restore-postgres-docker/https://joao-rocha.com/posts/dump-restore-postgres-docker/How to dump and restore a PostgreSQL database using Docker containers, without installing Postgres on your machine.Fri, 12 Jan 2024 00:00:00 GMTdockerpostgresdatabasebackuphttps://joao-rocha.com/posts/longhorn-backup-s3/https://joao-rocha.com/posts/longhorn-backup-s3/A guide on how to configure an S3 backup target (MinIO or Backblaze) for Longhorn on a k3s/Kubernetes cluster.Fri, 15 Dec 2023 00:00:00 GMTk3sk8slonghornbackups3miniostoragehttps://joao-rocha.com/posts/docker-wsl2/https://joao-rocha.com/posts/docker-wsl2/A guide on how to install and run Docker natively in WSL 2 on Windows, without Docker Desktop.Sun, 01 Oct 2023 00:00:00 GMTwsl2windowsdockerlinuxhttps://joao-rocha.com/posts/certbot-dns-challenge/https://joao-rocha.com/posts/certbot-dns-challenge/A guide on how to use the DNS challenge with Cloudflare and Certbot to issue and renew SSL certificates without stopping NGINX.Sat, 30 Sep 2023 00:00:00 GMTcertbotssllinuxnginxcloudflaredns