---
title: "VM Decommission Runbook"
description: "Step-by-step procedure for safely decommissioning a Proxmox VM — dependency checks, destruction, and repo cleanup."
type: runbook
domain: vm-management
tags: [proxmox, decommission, infrastructure, cleanup]
---

# VM Decommission Runbook

Procedure for safely removing a stopped Proxmox VM and reclaiming its disk space. Derived from the VM 105 (docker-vpn) decommission (2026-04-02, issue #20).

## Prerequisites

- VM must already be **stopped** on Proxmox
- Services previously running on the VM must be confirmed migrated or no longer needed
- SSH access to Proxmox host (`ssh proxmox`)

## Phase 1 — Dependency Verification

Run all checks before destroying anything. A clean result on all five means safe to proceed.

### 1.1 Pi-hole DNS

Check both primary and secondary Pi-hole for DNS records pointing to the VM's IP:

```bash
ssh pihole "grep '<VM_IP>' /etc/pihole/custom.list || echo 'No DNS entries'"
ssh pihole "pihole -q <VM_HOSTNAME>"
```

### 1.2 Nginx Proxy Manager (NPM)

Check NPM for any proxy hosts with the VM's IP as an upstream:

- NPM UI: https://npm.manticorum.com → Proxy Hosts → search for VM IP
- Or via API: `ssh npm-pihole "curl -s http://localhost:81/api/nginx/proxy-hosts" | grep <VM_IP>`

### 1.3 Proxmox Firewall Rules

```bash
ssh proxmox "cat /etc/pve/firewall/<VMID>.fw 2>/dev/null || echo 'No firewall rules'"
```

### 1.4 Backup Existence

```bash
ssh proxmox "ls -la /var/lib/vz/dump/ | grep <VMID>"
```

### 1.5 VPN / Tunnel References

Check if any WireGuard or VPN configs on other hosts reference this VM:

```bash
ssh proxmox "grep -r '<VM_IP>' /etc/wireguard/ 2>/dev/null || echo 'No WireGuard refs'"
```

Also check SSH config and any automation scripts in the claude-home repo:

```bash
grep -r '<VM_IP>\|<VM_HOSTNAME>' ~/Development/claude-home/
```

## Phase 2 — Safety Measures

### 2.1 Disable Auto-Start

Prevent the VM from starting on Proxmox reboot while you work:

```bash
ssh proxmox "qm set <VMID> --onboot 0"
```

### 2.2 Record Disk Space (Before)

```bash
ssh proxmox "lvs | grep pve"
```

Save this output for comparison after destruction.

### 2.3 Optional: Take a Final Backup

If the VM might contain anything worth preserving:

```bash
ssh proxmox "vzdump <VMID> --mode snapshot --storage home-truenas --compress zstd"
```

Skip if the VM has been stopped for a long time and all services are confirmed migrated.

## Phase 3 — Destroy

```bash
ssh proxmox "qm destroy <VMID> --purge"
```

The `--purge` flag removes the disk along with the VM config. Verify:

```bash
ssh proxmox "qm list | grep <VMID>"          # Should return nothing
ssh proxmox "lvs | grep vm-<VMID>-disk"       # Should return nothing
ssh proxmox "lvs | grep pve"                  # Compare with Phase 2.2
```

## Phase 4 — Repo Cleanup

Update these files in the `claude-home` repo:

| File | Action |
|------|--------|
| `~/.ssh/config` | Comment out Host block, add `# DECOMMISSIONED: <name> (<IP>) - <reason>` |
| `server-configs/proxmox/qemu/<VMID>.conf` | Delete the file |
| Migration results (if applicable) | Check off decommission tasks |
| `vm-management/proxmox-upgrades/proxmox-7-to-9-upgrade-plan.md` | Move from Stopped/Investigate to Decommissioned |
| `networking/examples/ssh-homelab-setup.md` | Comment out or remove entry |
| `networking/examples/server_inventory.yaml` | Comment out or remove entry |

Leave historical/planning docs (migration plans, wave results) as-is — they serve as historical records.

## Phase 5 — Commit and PR

Branch naming: `chore/<ISSUE_NUMBER>-decommission-<vm-name>`

Commit message format:
```
chore: decommission VM <VMID> (<name>) — reclaim <SIZE> disk (#<ISSUE>)

Closes #<ISSUE>
```

This is typically a docs-only PR (all `.md` and config files) which gets auto-approved by the `auto-merge-docs` workflow.

## Checklist Template

Copy this for each decommission:

```markdown
### VM <VMID> (<name>) Decommission

**Pre-deletion verification:**
- [ ] Pi-hole DNS — no records
- [ ] NPM upstreams — no proxy hosts
- [ ] Proxmox firewall — no rules
- [ ] Backup status — verified
- [ ] VPN/tunnel references — none

**Execution:**
- [ ] Disabled onboot
- [ ] Recorded disk space before
- [ ] Took backup (or confirmed skip)
- [ ] Destroyed VM with --purge
- [ ] Verified disk space reclaimed

**Cleanup:**
- [ ] SSH config updated
- [ ] VM config file deleted from repo
- [ ] Migration docs updated
- [ ] Upgrade plan updated
- [ ] Example files updated
- [ ] Committed, pushed, PR created
```
