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Switch VPN provider ExpressVPN -> PIA (ADR-0013 supersedes ADR-0012)

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Operator turned off ExpressVPN auto-renew and purchased PIA. The single-shared-
gateway model is retained; provider/client/protocol change to PIA via Gluetun
over WireGuard with native port forwarding (qbittorrent-natmap port-sync).
Simpler than ExpressVPN: no custom OpenVPN config, just PIA user/pass
SOPS-encrypted; Gluetun provides the built-in kill-switch.

Updated: ADR-0013 (new) + ADR-0012 superseded + index; docs 00,01,03,07;
task board (T-3.2p/T-3.2, OQ-3).

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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jakman85andClaude Opus 4.8 committed 2026-08-15 23:16:33 -05:00
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docs/01-architecture-overview.md
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@@ -15,7 +15,7 @@ choice here without a superseding ADR.**
| VM workloads (IaaS) | **KubeVirt** (+ CDI) | R-PLAT-03 | [ADR-0005](../decisions/adr-0005-vm-workloads-kubevirt.md) | [06](06-vm-workloads-kubevirt.md) |
| TLS | **cert-manager** + Let's Encrypt (DNS-01) | R-TLS-01..03 | [ADR-0006](../decisions/adr-0006-tls-cert-manager-letsencrypt.md) | [08](08-tls-and-certificates.md) |
| Secrets | **SOPS + age** (Flux-native) | R-SEC-01 | [ADR-0007](../decisions/adr-0007-secrets-sops-age.md) | [07](07-security-and-secrets.md) |
| VPN egress | **Single shared in-cluster ExpressVPN gateway** (OpenVPN UDP) + Cilium Egress Gateway | R-NET-05/06/07 | [ADR-0012](../decisions/adr-0012-vpn-egress-single-expressvpn-gateway.md) (supersedes 0008) | [03](03-networking-isolation-and-egress.md) |
| VPN egress | **Single shared in-cluster PIA/Gluetun gateway** (WireGuard + native PF) + Cilium Egress Gateway | R-NET-05/06/07 | [ADR-0013](../decisions/adr-0013-vpn-provider-pia-gluetun-wireguard.md) (supersedes 0012/0008) | [03](03-networking-isolation-and-egress.md) |
| Automated updates | **Flux image-update-automation** (images) + **Renovate** (charts) | R-UPD-01..03 | [ADR-0009](../decisions/adr-0009-automated-image-updates.md) | [11](11-automated-updates.md) |
| DNS records | **ExternalDNS** (public via Cloudflare) + **PiHole** (internal) | R-DNS-01..03 | — | [09](09-dns-and-ingress.md) |
| Ingress (north-south) | **Gateway API** implemented by Cilium | R-DNS-01, R-TLS-01 | [ADR-0002](../decisions/adr-0002-cni-cilium.md) | [09](09-dns-and-ingress.md) |