Networking

IP layout

Segment	Range	Purpose
LAN	`192.168.20.0/24`	All VMs — flat layer 2
MetalLB pool	Reserved /28 within LAN	LoadBalancer services in Kubernetes
K8s service CIDR	`10.43.0.0/16`	In-cluster service IPs
K8s pod CIDR	`10.42.0.0/16`	Pod networking (Flannel)
WireGuard	`10.133.7.0/24`	VPN tunnel: cluster ↔ edge VPS

Traffic flows

Public services (Cloudflare tunnel)

User → Cloudflare (CDN + DDoS) → Cloudflared pod (×2, in-cluster) → Traefik → Service

Cloudflare handles CDN and TLS termination. No ports are forwarded on the home router.

VPS-proxied services (Pangolin tunnel)

User → Edge VPS → Traefik (VPS) → Pangolin server → Newt client (in-cluster) → Traefik → Service

Used for services that need HTTP(S) proxying without Cloudflare in front.

Remote admin (WireGuard VPN)

Admin → WireGuard client → Edge VPS (WireGuard server)
      → wg-gateway pod (10.133.7.4)
      → K8s service CIDR (10.43.0.0/16)

The mii-wireguard pod is the WireGuard client inside the cluster. It masquerades the K8s service CIDR so all cluster services are reachable over the VPN without split-DNS.

Gitea → ArgoCD webhook

Gitea (docker-host11) → push webhook → ArgoCD (in-cluster) → reconcile manifests

ArgoCD polls on a schedule and also receives webhooks on git push.

ArgoCD Image Updater → Gitea

Image Updater detects new tag in registry
  → commits updated annotation to Gitea repo
  → ArgoCD detects commit → re-syncs Deployment

Keeps image versions in Git without a human in the loop.

Media stack

Prowlarr (indexer aggregator)
  → Sonarr / Radarr (request management)
  → download client + Gluetun sidecar (VPN-isolated)
  → Unpackarr (extract archives)
  → NFS share on aya01
  → Jellyfin (on docker-host11, hardware transcoding via Intel QuickSync)

Certificate management

Cert-Manager handles all TLS automatically via Let's Encrypt DNS-01 using the Cloudflare API. DNS-01 works for internal-only domains and wildcard certs without exposing any HTTP endpoint.

The edge VPS uses the Netcup DNS API for its own certs.

Service mesh

Istio runs in Ambient mode — no sidecars. The ztunnel DaemonSet runs on every node and handles transparent L4 proxying for all pods in the mesh. Waypoint proxies (L7) are not yet deployed.

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