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 […]
Ceph
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.
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
EJBCA, Keycloak
Integrate EJBCA RA Web Login with Keycloak (OIDC / OAuth2)
This post documents a working setup to log in to EJBCA RA Web using Keycloak as an OpenID Connect (OIDC)
EJBCA
Install EJBCA CE on Ubuntu 24.04 with WildFly + MariaDB (no Docker)
This guide installs EJBCA Community Edition (example: r9.3.7) on Ubuntu 24.04, using WildFly as the application server and MariaDB as
Docker, Zabbix
Run Zabbix 7.4 on Docker Compose with HTTPS (No Reverse Proxy, DNS-01 Certbot, Bind Mounts Only)
This post shows a clean way to run Zabbix Server + Zabbix Web (NGINX) + MariaDB using Docker Compose, and
Jenkins, Keycloak
Why Jenkins Keeps Logging You Out (OIDC + Keycloak): Finding and Fixing the Timeout Layer
When Jenkins is authenticated by Keycloak (OIDC) and sits behind NGINX, “session timeout” is not a single knob. You can
GitHub, Teleport
Enable GitHub SSO for Teleport Community Edition
This guide enables GitHub login for a self-hosted Teleport Community Edition cluster using a GitHub OAuth App and maps GitHub
Keycloak, WordPress
Authenticate WordPress to Keycloak with OpenID Connect (OIDC) using a plugin
This post shows how to authenticate WordPress (https://www.maksonlee.com) against Keycloak (https://keycloak.maksonlee.com) using OpenID Connect (OIDC) with a WordPress plugin (no
WordPress
Configure WordPress SMTP with Zoho Mail Using Post SMTP
WordPress email delivery can be unreliable when it uses PHP mail (password resets, contact form notifications, admin alerts). The fix
Keycloak
Upgrade Keycloak (Tarball + systemd + MariaDB) on Ubuntu 24.04
Short outage method: Stop → Backup → Upgrade → Start Example upgrade: 26.4.6 → 26.5.2 This post upgrades a Keycloak