Spin Up a Kiwi TCMS Dev Environment on Ubuntu 24.04 Server (Headless) and Access It via SSH Port Forwarding
Goal: Build Kiwi TCMS from source on a GUI-less Ubuntu 24.04 Server and run it in development mode (Django runserver […]
Kiwi TCMS
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.
Apache Cassandra, Apache Spark, Debezium, ThingsBoard
When Delta Has More Rows Than Cassandra: ThingsBoard + Cassandra CDC → Debezium → Kafka → Spark → Delta Lake (TTL Gotcha)
Goal of this postDocument the exact debugging path we followed when our Delta table started showing more rows than Cassandra—step
Apache Spark
Enable Spark Connect (systemd) + Set Hive Catalog on Spark 4.0
This post is a follow-up to:Upgrade Apache Spark 3.5.6 → 4.0 on Ubuntu 24.04 (Single Node, Classic Mode) What you’ll
Apache Spark
Upgrade Apache Spark 3.5.6 → 4.0 on Ubuntu 24.04 (Single Node, Classic Mode)
Goal: Install Spark 4.0.0 (Hadoop 3, Connect build) at /opt/spark, but keep Classic mode for now by setting SPARK_CONNECT_MODE=0.We’ll remove
Zabbix
Zabbix 7.4 + Keycloak (SAML 2.0): End-to-End Setup with JIT Provisioning
This guide connects Zabbix 7.4 at https://zabbix.maksonlee.com to Keycloak at https://keycloak.maksonlee.com (realm maksonlee.com) using SAML 2.0, and enables Just-in-Time (JIT)
Zabbix
Monitor a Linux Host with Zabbix 7.4 (Ubuntu 24.04)
What you’ll do: add a Linux machine to Zabbix using the standard agent so you get CPU, memory, disk, filesystem,
MariaDB
Install MariaDB 11.4 on Ubuntu 24.04
Summary: Ubuntu 24.04’s repo installs MariaDB 10.11.x. This guide adds MariaDB’s official APT repo to install MariaDB 11.4, secures the
Apache Cassandra, Apache Spark, Debezium, Kafka
End-to-End: Stream Cassandra 5.0.5 CDC → Kafka 4.0 (SASL/SSL) → Spark 3.5.6 → Delta Lake
This post shows a clean, reproducible path to stream ThingsBoard data stored in Cassandra 5.0.5 into Kafka 4.0 using Debezium
Apache Cassandra
Fix cqlsh “unsupported version of Python” on Ubuntu 24.04 (Cassandra 5.0.5) with pyenv
Symptom Ubuntu 24.04 ships Python 3.12, but cqlsh 6.2.0 (Cassandra 5.0.x) only supports up to Python 3.11. This post shows
Python
Install Python 3.11 on Ubuntu 24.04 (Keep System 3.12) with pyenv
Need Python 3.11 on Ubuntu 24.04 (which ships 3.12)? Use pyenv to install 3.11 side-by-side without touching /usr/bin/python3. At a