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beatzaplentyandClaude Sonnet 4.6
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Check NixOS configurations / eval-hosts (push) Successful in 10m35s
Both VIPs fail over together in ha-group: vip-lan: 192.168.2.229/24 on ens18 (vmbr0) — LAN iSCSI + NFS access vip-storage: 192.168.5.229/24 on ens20 (vmbr2) — storage-client iSCSI + NFS variables.nix: haServerLanVip = "192.168.2.229" cluster-init.sh: both VIP primitives in ha-group XML; VIP_LAN var added ip-addressing.md: both VIP entries documented Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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IP Addressing Scheme
Subnets
| Subnet | CIDR | Purpose | Routed? |
|---|---|---|---|
| LAN | 192.168.2.0/24 |
General LAN — clients and infrastructure | Yes (gateway .254) |
| Cluster | 192.168.4.224/29 |
HA file server DRBD replication + Corosync heartbeat | No — internal vmbr1 only, no uplink |
| Storage client | 192.168.5.0/24 |
HA file server iSCSI + NFS — docker and server access VIP here | No — internal vmbr2 only, no uplink |
The cluster and storage-client subnets never leave pve1. vmbr1 and vmbr2 are Proxmox Linux
bridges with no physical port attached; traffic between guests on each bridge stays in-kernel.
The host octet is consistent across all subnets — e.g. ha-node1 is always .228:
192.168.2.228 (LAN), 192.168.4.228 (cluster), 192.168.5.228 (storage client).
LAN — 192.168.2.0/24
Address map
| Range | Purpose |
|---|---|
| .1–.9 | Reserved, never assign |
| .10–.59 | Client DHCP pool (router-assigned) |
| .60–.219 | Unallocated buffer |
| .220–.229 | Virtual nodes (VMs / LXC containers) |
| .230–.239 | Expansion buffer (reserved, unallocated) |
| .240–.249 | Physical nodes (bare-metal hosts) |
| .250–.253 | Network services |
| .254 | Router / gateway |
Network services (.250–.253)
| IP | Hostname | Role |
|---|---|---|
192.168.2.254 |
router | Gateway (TP-Link) |
192.168.2.253 |
domain-controller | FreeIPA — authoritative DNS for sweet.home, Kerberos, LDAP |
192.168.2.250–.252 |
— | Reserved for future network services |
Physical nodes (.240–.249)
| IP | Hostname | Role |
|---|---|---|
192.168.2.245 |
pve1 | Proxmox VE hypervisor |
192.168.2.244 |
pbs | Proxmox Backup Server |
192.168.2.243 |
nixos | Bare-metal workstation (baremetal-gui) |
192.168.2.246–.249 |
— | Reserved — second Proxmox node and associated services |
192.168.2.240–.242 |
— | Reserved |
pve1 sits mid-range deliberately so a second Proxmox node can slot in on either side.
Virtual nodes (.220–.229)
All VMs and LXC containers run on pve1.
| IP | Hostname | Role | Status |
|---|---|---|---|
192.168.2.229 |
ha-vip-lan | HA file server LAN floating VIP (Pacemaker vip-lan) — LAN iSCSI + NFS |
Active |
192.168.2.228 |
ha-node1 | HA file server node 1 — management NIC | Active |
192.168.2.227 |
ha-node2 | HA file server node 2 — management NIC | Active |
192.168.2.226 |
server | Current NFS/ZFS file server — retires when HA is live | Retiring |
192.168.2.225 |
docker | Docker / Traefik stack | Active |
192.168.2.224 |
nix-cache | Nix binary cache + remote builder | Active |
192.168.2.223 |
pxe-boot | PXE / TFTP / HTTP netboot server | Active |
192.168.2.222 |
tailscale-router | Tailscale exit node / router | Active |
192.168.2.221 |
tor-relay | Tor relay | Active |
192.168.2.220 |
pdm | Proxmox Deploy Manager | Active |
Client DHCP pool (.10–.59)
Assigned by the router. DNS option points to 192.168.2.253 (domain-controller).
Devices in this range: phones, laptops, IoT, Canon printer, any non-infrastructure host. No static reservations for infrastructure hosts — all infra uses static IP configuration on the guest itself (not DHCP reservations), so IPs survive VM recreation regardless of MAC address churn.
Cluster network — 192.168.4.224/29
Internal to pve1 only. Proxmox bridge vmbr1, no physical NIC attached.
| IP | Hostname | Interface role |
|---|---|---|
192.168.4.228 |
ha-node1 | DRBD replication + Corosync ring0 (primary heartbeat) |
192.168.4.227 |
ha-node2 | DRBD replication + Corosync ring0 (primary heartbeat) |
| — | no gateway | Isolated — not routed to LAN or internet |
Corosync ring1 (backup heartbeat only) uses the LAN IPs (192.168.2.228 / 192.168.2.227)
over vmbr0 — no additional bridge needed, and DRBD traffic never crosses ring1.
Storage-client network — 192.168.5.0/24
Internal to pve1 only. Proxmox bridge vmbr2, no physical NIC attached.
| IP | Hostname | Interface / role |
|---|---|---|
192.168.5.229 |
ha-vip | Pacemaker floating VIP — iSCSI portal + NFS endpoint |
192.168.5.228 |
ha-node1 | Storage-client NIC (ens20 / vmbr2) |
192.168.5.227 |
ha-node2 | Storage-client NIC (ens20 / vmbr2) |
192.168.5.226 |
server | Storage-client NIC (ens19 / vmbr2) — for final rsync before cutover |
192.168.5.225 |
docker | Storage-client NIC (eth1 / vmbr2) — iSCSI initiator + NFS client |
| — | no gateway | Isolated — not routed to LAN or internet |
iSCSI initiators and NFS clients connect exclusively to the VIP (192.168.5.229) so sessions
survive failover transparently. The portal is bound to the VIP only (not [::0]).
Migration reference
Current → target IP for every host being renumbered.
| Host | Current IP | New IP | Config location |
|---|---|---|---|
| router | 192.168.2.254 |
192.168.2.254 |
unchanged |
| domain-controller | 192.168.2.138 |
192.168.2.253 |
/etc/sysconfig/network-scripts/ifcfg-eth0 on guest |
| pve1 | 192.168.2.250 |
192.168.2.245 |
/etc/network/interfaces on Proxmox host |
| pbs | 192.168.2.108 |
192.168.2.244 |
static config on PBS host |
| nixos workstation | 192.168.2.119 |
192.168.2.243 |
networking.interfaces / NetworkManager on guest |
| ha-node1 | — | 192.168.2.228 (LAN), 192.168.4.228 (cluster), 192.168.5.228 (storage) |
active |
| ha-node2 | — | 192.168.2.227 (LAN), 192.168.4.227 (cluster), 192.168.5.227 (storage) |
active |
| ha-vip-lan | — | 192.168.2.229 (vmbr0 / Pacemaker vip-lan) — LAN iSCSI + NFS |
active |
| ha-vip-storage | — | 192.168.5.229 (vmbr2 / Pacemaker vip-storage) — storage-client iSCSI + NFS |
active |
| server | 192.168.2.252 |
192.168.2.226 |
static config on guest |
| docker | 192.168.2.249 |
192.168.2.225 |
static config on guest |
| nix-cache | 192.168.2.120 |
192.168.2.224 |
static config on guest |
| pxe-boot | 192.168.2.247 |
192.168.2.223 |
static config on guest; update vars.pxeServerIp in variables.nix ✓ |
| tailscale-router | 192.168.2.121 |
192.168.2.222 |
static config on guest |
| tor-relay | 192.168.2.107 |
192.168.2.221 |
static config on guest |
| pdm | 192.168.2.248 |
192.168.2.220 |
static config on guest |
Cutover notes
- Do domain-controller first — it becomes the DNS server; everything else depends on it having its new IP and FreeIPA DNS configured before Pi-hole is retired.
- pve1 last among physical hosts — changing the Proxmox management IP drops the web UI briefly; all guests keep running.
- Update Pi-hole custom.list / FreeIPA DNS A records to new IPs before flipping any host, so name resolution stays valid throughout the migration.
- variables.nix already updated for
pxeServerIp(.247→.223),pbsIp(.108→.244), and newdomainControllerIp(.253). Rebuild affected hosts after renumbering. - Router DHCP: once domain-controller is at .253 and FreeIPA DNS is serving
sweet.home, switch router DHCP on with pool .10–.59 and DNS option pointing to .253; retire Pi-hole CT. - Pi-hole's iPXE dnsmasq config (
99-ipxe-chainload.conf) moves to the pxe-boot CT as a dnsmasq proxy-mode config before Pi-hole is decommissioned.