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 […]
Apache Spark
Zabbix
Zabbix 7.4 + Keycloak (SAML 2.0): End-to-End Setup with JIT Provisioning
This guide shows how to connect Zabbix 7.4 at https://zabbix.maksonlee.com to Keycloak at https://keycloak.maksonlee.com (realm maksonlee.com) using SAML 2.0. We’ll
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
Ubuntu
Fixing PCIe AER Errors on Minisforum Venus Series (AMD Ryzen 9 7940HS)
Introduction If you own a Minisforum Venus series mini PC with an AMD Ryzen 9 7940HS and run heavy workloads
Ceph, Kafka
How to Enable Ceph RGW Kafka Bucket Notifications
This guide shows you how to configure Ceph RGW to send bucket event notifications to Kafka over HTTPS using SASL/PLAIN
Kafka
How to Install Kafbat UI for Kafka 4.0 with SASL/PLAIN and HAProxy SSL Termination
In this post, we’ll set up Kafbat UI, a modern web-based Kafka management interface, to work with a secure Kafka