7dfe89a6e0
Five compounding factors produced the 2026-04-22 flap cascade: soft anti-affinity let 2/3 pods co-locate on k8s-node3 (which bounced NotReady→Ready at 11:42Z and took quorum), aggressive sentinel/probe timing amplified LUKS-encrypted LVM I/O stalls into spurious +switch-master loops, HAProxy's 1s polling raced sentinel failovers and routed writes to demoted masters, publish_not_ready_addresses=true fed not-yet-ready pods into HAProxy DNS, and realestate-crawler-celery CrashLoopBackOff closed the feedback loop. Changes: - Anti-affinity: preferred → required (one redis pod per node, hard) - Sentinel down-after-ms 5000→15000, failover-timeout 30000→60000 - Redis + sentinel liveness: timeout 3→10, failure_threshold 3→5 - HAProxy: check inter 1s→2s / fall 2→3, timeout check 3s→5s - Headless svc: publish_not_ready_addresses true→false Post-rollout verification clean: 0 flaps, 0 +switch-master events, 0 celery ReadOnlyError in the 60s window after settle. Docs updated. |
||
|---|---|---|
| .. | ||
| architecture | ||
| plans | ||
| post-mortems | ||
| runbooks | ||
| 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