Enable Trivy on an Existing Harbor 2.14.0
TL;DR Stop Harbor → run ./prepare –with-trivy once → start Harbor. Because you previously had no scanner, Trivy becomes the
Identity, Security & PKI
Configuration
Observability & Operations
Monitor OPNsense with Zabbix (Active Agent, GUI-only)
TL;DR Install the OPNsense Zabbix Agent plugin → enable it → set Hostname to exactly your Zabbix host name →
Data Platforms & Analytics
Global Reset: Cassandra CDC → Debezium → Kafka (SASL/SSL via HAProxy) → Spark → Delta Lake
Scope: wipe & rebuild the full ThingsBoard data pathKeyspace: thingsboard (drop + recreate)Kafka topics: tb.thingsboard.ts_kv_cf, tb.thingsboard.ts_kv_partitions_cf (auto-create enabled)Delta root: /delta
Data Platforms & Analytics
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
Observability & Operations
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)
Data Platforms & Analytics
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
Data Platforms & Analytics
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
Data Platforms & Analytics
How to Enable Username/Password Authentication (SASL/PLAIN) in Kafka 4.0 with HAProxy SSL Termination
In the previous post, How to Install Kafka 4.0 on a Single Ubuntu 24.04 Node with HAProxy SSL Termination, we
Cloud, Linux & Virtualization
Testing Object Versioning and Synchronization in Ceph RGW Multisite
Introduction In the previous post, How to Configure Ceph RGW Multisite with HAProxy and Let’s Encrypt on Ubuntu 24.04, we
Networking & Connectivity
How to Configure Ceph RGW Multisite with HAProxy and Let’s Encrypt on Ubuntu 24.04
In this post, we’ll walk through setting up Ceph RGW (RADOS Gateway) multisite using two separate clusters on Ubuntu 24.04.