Host Your Own Docker Images on Sonatype Nexus 3 OSS (HTTPS via HAProxy, Ubuntu 24.04)
Why use Nexus as a Docker Registry? If you already run Sonatype Nexus and don’t want to stand up Harbor, […]
Docker, Sonatype Nexus
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.
Sonatype Nexus
Install Sonatype Nexus 3 on Ubuntu 24.04 with HTTPS
Overview Part A — Install Nexus Result: Open http://<server>:8081/ and sign in with the initial password: Part B — HTTPS
Docker, Harbor, Trivy
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
Harbor
Upgrade Harbor 2.13.1 → 2.14.0 on Ubuntu 24.04
TL;DR: This upgrades Harbor 2.13.1 → 2.14.0 for the exact setup from my previous guide — Install Harbor 2.13.1 on
KVM, Ubuntu
Increase a KVM qcow2 Disk Offline (Ubuntu 24.04 + LVM)
Goal: grow /var/lib/libvirt/images/rbe-b.qcow2 offline on the host, then expand LVM inside the Ubuntu 24.04 guest. TL;DR (commands only) Host (VM
AOSP, Buildbarn
Setting Up a Buildbarn RBE Cluster for AOSP (Ubuntu 24.04, From Source)
Topology What you get TL;DR Build the five binaries with Bazelisk, create storage/worker file pools, drop the Jsonnet files under
OpenDJ
Install phpLDAPadmin v2.3.5 on Ubuntu 24.04 (PHP 8.4 + Nginx)
Goal: native install of phpLDAPadmin v2 (2.3.5) under /opt/phpLDAPadmin, served by Nginx + PHP-FPM 8.4, connecting to LDAP/LDAPS. Node is
Squid
Speed up repeat downloads with an explicit Squid 7.1 proxy on Ubuntu 24.04
(Build from source • MITM with a Squid-only Sub-CA signed by your root • Broad caching • Run as proxy
OpenDJ
OpenDJ: Find the JVM’s Default Heap and Right-Size It for Tiny Directories
TL;DR: Use jcmd to see what heap Java chose by default. For a tiny directory (~10 entries), set -Xms128m -Xmx128m
OpenLDAP
Upgrade OpenDJ 4.9.4 → 4.10.2 on Ubuntu 24.04
Scope: In-place upgrade of a single OpenDJ node installed via the official .deb. No topology or port changes. Prerequisite: You