Enable Key Recovery in EJBCA for Device Certificates
In my previous post, I used EJBCA RA Web to issue ThingsBoard device certificates from an externally signed IoT device […]
EJBCA
Hands-On DevOps & Homelab Experiments
From Kubernetes and Ceph to Proxmox, Kafka, Jenkins, Vault, Android, and CI/CD, every guide here is a tested, step-by-step walkthrough from my lab.
EJBCA, Smallstep, ThingsBoard
Manage ThingsBoard Device Certificates with EJBCA After Creating an External IoT Device CA
In my environment, I already had Step CA running as my private PKI bootstrap CA, EJBCA CE running on Ubuntu
Subtitle Edit, Whisper
How to Use Subtitle Edit 4.0.15 to Add Traditional Chinese Subtitles to a Video on Windows
If you have a video with Chinese speech and want to add Traditional Chinese subtitles to it, Subtitle Edit provides
Ollama, Open WebUI
How to Run Ollama and Open WebUI on WSL 2 Ubuntu 24.04 on Windows 11 with an NVIDIA GeForce RTX 5060 Ti 16GB
Running local AI on Windows 11 does not require a separate Linux machine. A clean setup is to run Ubuntu
OpenObserve
Install OpenObserve Enterprise HA on Bare-Metal Kubernetes with Traefik + Ceph RGW (S3) + Ceph RBD
This post performs a fresh installation of OpenObserve Enterprise in HA (cluster) mode on a bare-metal Kubernetes cluster using the
OpenObserve
Add an Ubuntu 24.04 Linux Server Data Source to OpenObserve
This post adds a Linux server (Ubuntu 24.04) as a data source to my existing OpenObserve standalone (local mode) deployment.
OpenObserve
Deploy OpenObserve Standalone on Bare-Metal Kubernetes with Traefik + Ceph RBD (PVC)
This post deploys OpenObserve in standalone (single-node / local mode) on a bare-metal Kubernetes cluster using the official openobserve-standalone Helm
Backstage, Grafana
Create a Grafana Dashboard for Backstage Metrics on Mimir (OTel → Alloy → Mimir)
This post continues from: Backstage metrics flow: Backstage (OpenTelemetry SDK) → OTLP/HTTP → Alloy → remote_write → Mimir → Grafana
Ceph
Upgrade a Single-Node Ceph Squid (v19) cephadm Cluster to Tentacle (v20) on Ubuntu 24.04
…and switch from Ubuntu’s apt cephadm (v19) to a manually downloaded cephadm (v20) This post documents a practical, works-in-real-life upgrade
MariaDB, WildFly
Fix “JDBC Socket error / Connection reset by peer” in WildFly with MariaDB (Stale Connection Pool)
This post explains a common (and confusing) failure mode when running EJBCA on WildFly with MariaDB/MySQL: An exception has occurred.JDBC