3fa9e2409c
Documents the 6-worker cluster shape (post 2026-05-26 scale-up after the proxmox-csi LUN-cap incident), the six binding constraints (plugin LUN cap at 29/VM, memory commit, sdc IO contention, GPU concentration on node1, PVE host memory, no Terraform management for K8s VMs), and the playbooks for adding/removing workers. Scale-up triggers: - max-node VA count ≥ 25 (~86% of 29 cap) for ≥7 days - cluster memory requests > 90% - LUN-cap incident - planned ≥3 net-new block PVCs when max VA already ≥ 22 Scale-down conditions: - max-node PVC count ≤ 20, memory < 70%/95% for ≥30 days Playbooks lean on scripts/provision-k8s-worker (clones template 2000, cloud-inits, auto-joins) for adds; kubectl cordon → drain → delete node → qm shutdown for removes. Cold-spare option documented. Related: docs/architecture/storage.md § Per-VM SCSI-LUN cap, docs/post-mortems/2026-05-25-immich-anca-elements-io-storm.md, beads code-oflt (IO contention long-term fix). |
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| known-issues.md | ||
| README.md | ||
Infrastructure Documentation
This repository contains the configuration and documentation for a homelab Kubernetes cluster running on Proxmox. The infrastructure hosts 70+ services managed declaratively with Terraform and Terragrunt.
Quick Reference
Network Ranges
- Physical Network:
192.168.1.0/24- Physical devices and host network - Management VLAN 10:
10.0.10.0/24- Infrastructure VMs and management - Kubernetes VLAN 20:
10.0.20.0/24- Kubernetes cluster network
Key URLs
- Public:
viktorbarzin.me - Internal:
viktorbarzin.lan
Architecture Documentation
| Document | Description |
|---|---|
| Overview | Infrastructure overview, hardware specs, VM inventory, and service catalog |
| Networking | Network topology, VLANs, routing, and firewall rules |
| VPN | Headscale mesh VPN and Cloudflare Tunnel configuration |
| Storage | Proxmox host NFS, Proxmox CSI (LVM-thin + LUKS2), and persistent volume management |
| Authentication | Authentik SSO, OIDC flows, and service integration |
| Security | CrowdSec IPS, Kyverno policies, and security controls |
| Monitoring | Prometheus, Grafana, Loki, and observability stack |
| Secrets Management | HashiCorp Vault integration and secret rotation |
| CI/CD | Woodpecker CI pipeline and deployment automation |
| Backup & DR | Backup strategy, disaster recovery, and restore procedures |
| Compute | Proxmox VMs, GPU passthrough, K8s resource management, and VPA |
| Databases | PostgreSQL, MySQL, Redis, and database operators |
| Multi-tenancy | Namespace isolation, tier system, and resource quotas |
Operations
- Runbooks - Step-by-step operational procedures
- Plans - Infrastructure change plans and rollout strategies
Getting Started
- Review the Overview for a high-level understanding
- Read the Networking doc to understand connectivity
- Check Compute for resource management patterns
- Explore individual architecture docs based on your area of interest