82855848d1
Decision-support doc, NOT a commitment. Evaluates whether replacing
proxmox-csi with TopoLVM would lift the per-VM 29-PVC ceiling
permanently and at what cost.
Key trade-off documented: TopoLVM PVCs are pinned to the node where
the LV lives (topology.topolvm.cybozu.com/node). proxmox-csi PVCs
migrate between VMs when pods reschedule. The data-locality penalty
matters most for single-replica stateful services (MySQL standalone,
Nextcloud, Vaultwarden, mailserver, claude-memory, ~30 SQLite-backed
apps); replicated services (CNPG PG cluster, Redis-v2, Vault Raft)
absorb it.
Three disk-layout options:
A. Carve per-VM data disks from sdc — simple, no hardware,
IO contention unchanged
B. Hybrid SSD/HDD — SSD-constrained at 675 GiB free
C. Add a dedicated NVMe — also closes beads code-oflt (IO
contention), ~£200 hardware investment
Effort estimate: 2.5-3 weeks of focused work for the full migration;
covers TopoLVM install, lvmd config, per-VM disk provisioning,
LUKS plumbing, 5 migration waves (regenerable → huge PVCs),
backup-pipeline rewrite, deprecation.
Recommended next step before committing: small pilot on
k8s-node5/6 with one non-critical PVC to validate the operational
pattern end-to-end.
Related: docs/architecture/storage.md § Per-VM SCSI-LUN cap,
docs/runbooks/scale-k8s-cluster.md (Path 1+2 alternative),
beads code-oflt (IO isolation).
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| architecture | ||
| benchmarks | ||
| plans | ||
| post-mortems | ||
| runbooks | ||
| 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