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Bug #420

open

OAM: Static DHCP reservations + LAN reverse DNS for all production VMs

Bug #420: OAM: Static DHCP reservations + LAN reverse DNS for all production VMs

Added by Charles N 1 day ago. Updated about 24 hours ago.

Status:
New
Priority:
High
Assignee:
Charles N
Target version:
Cat3: Monitoring/Backups/Infrastructure
Start date:
08/11/2026
Due date:
% Done:

80%

Estimated time:

Description

Production VMs have no DHCP reservations — they float in the pool. This breaks SNMP source resolution, syslog hostname lookup, and any LAN-addressed service. Pin each VM to its current LAN IP (non-disruptive) and add forward+reverse DNS records in Technitium.

Scope

  • Cross-reference Proxmox VM MACs with ARP table on netinfra-01
  • Create DHCP reservations at current IPs (no IP changes)
  • Add A + PTR records in Technitium for the 192.168.x names
  • Verify DHCP failover sync propagates to netinfra-02
  • Exclude: sectestbed-* (lab), templates, retired VMs

Data already gathered

  • 60 VM MAC addresses from all 7 Proxmox hosts
  • ARP table from netinfra-01 with current MAC→IP mappings
  • Existing dhcpd-primary.conf with 25 physical host reservations

Updated by Charles N 1 day ago Actions
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 #1

  • Assignee set to Charles N
  • Priority changed from Normal to High
  • Target version set to Cat3: Monitoring/Backups/Infrastructure

Updated by Charles N about 24 hours ago Actions
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 #2

  • % Done changed from 0 to 80

Completed 2026-08-11:

DHCP Reservations (netinfra-01 + netinfra-02)

18 production VMs pinned to current ARP-observed IPs (no IP changes):
tsys-ca, pfv-netinfra-01/02, tsys-librenms, tsys-proxmox-datacenter,
pfv-k8s-wnode-tsys3/5/6/7, pfv-proxmox-backup-server, preprod-hfnoc-uisp,
tsys-awx, pfv-rr-middleware-01/02, tsys-proxmox-mailgw-01/02, tsys-voip,
tsys-siem.

Syntax checked, DHCP reloaded, failover sync triggered to netinfra-02.

PTR Records (Technitium)

18 PTR-only records added across reverse zones 1/2/3.168.192.in-addr.arpa.
All verified via API. No forward records (those point to Tailscale 100.x).

Remaining gaps

  • pfv-k8s-wnode-tsys9: offline, not in ARP (add when back online)
  • DellOpenManageEnterprise: offline, not in ARP (add when back online)
  • tsys-siem: stale MAC in existing reservation (old Hyper-V MAC 00:15:5d:64:e8:33 vs current Proxmox MAC bc:24:11:ee:67:e2). Added as 'tsys-siem-new' to avoid duplicate host name. Old entry needs cleanup.

Commit: 8f38cab

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