# Proxmox Config File Parsing for Inventory Mapping

## LXC Containers (`/etc/pve/lxc/<CTID>.conf`)

Key fields to extract:
- `hostname: <name>` — container hostname
- `memory: <MB>` — RAM allocation
- `cores: <N>` — CPU cores
- `net0: ... ip=<IP>` or `ip=dhcp` — network config (may be multiple net lines)

### Static IP parsing
```bash
grep -E '^net[0-9]+:' /etc/pve/lxc/135.conf | grep 'ip='
# → net0: ... ip=10.0.30.102/24,...
```

### DHCP mapping
DHCP-assigned CTs do not show an IP in the config. Match by:
- Hostname from config → runtime `hostname` collected via SSH
- MAC address (`hwaddr=`) from config → ARP table lookup
- Or query Proxmox API: `pvesh get /nodes/<node>/lxc/<vmid>/config`

## QEMU VMs (`/etc/pve/qemu-server/<VMID>.conf`)

- `name: <name>` — VM name
- `net0: ... bridge=vmbr0,tag=<VLAN>` — network (usually DHCP, no static IP in config)

VM IPs are typically assigned by DHCP. To discover:
```bash
# From Proxmox node
arp -a | grep <MAC>
# Or via API
pvesh get /nodes/<node>/qemu/<vmid>/agent/network-get-interfaces
```

## Cross-referencing SSH inventory with Proxmox configs

1. Collect all CT configs → map `CTID → hostname → config_ip`
2. Collect all VM configs → map `VMID → name → VLAN`
3. For each accessible SSH host:
   - Match `hostname` against CT/VM hostname
   - If match found → assign CT/VM ID
   - If no match → mark as "unknown CT/VM or bare metal"
4. Flag CTs/VMs in range that were NOT accessible (potential gap in scan)

## Proxmox API alternative

If SSH to Proxmox node is available but direct file parsing is messy:
```bash
pvesh get /cluster/resources --output-format json | jq '.[] | select(.type=="lxc" or .type=="qemu") | {id, name, status, node}'
```