# Procedure: Proxmox VE Post-Install Optimization

**Scope:** Single-node PVE 9.2 (Debian Trixie) post-install cleanup — storage repartitioning, repository configuration, subscription-nag removal, and DNS fix.
**Author:** F.R.I.D.A.Y.
**Date:** 2026-05-31
**Prerequisites:** PVE 9.2 installed, node reachable via SSH as root, node has internet (or will after DNS fix).

---

## 1. Storage Repartitioning (Remove local-lvm, Expand Root)

**Goal:** Delete the default thin pool and give all disk space to the root volume for LXC/VM root disks.

### 1.1 Remove the LVM Thin Pool and LV

```bash
# Check current layout
lvs
vgs
pvs

# Remove the Proxmox data thin pool LV
lvremove pve/data
# Confirm with "y" when prompted
```

### 1.2 Expand pve/root to Fill Free Space

```bash
# Extend the root logical volume to 100% of free VG space
lvextend -l +100%FREE pve/root

# Resize the ext4 filesystem online (no reboot needed)
resize2fs /dev/mapper/pve-root

# Verify
lvs
df -h /
```

Expected: `pve-root` is now ~930G–945G depending on disk size.

### 1.3 Remove local-lvm from Proxmox Storage Config

**Critical:** Deleting the LV does NOT remove the storage definition. The web UI will still show `local-lvm` as missing/unavailable until you do this:

```bash
cfg="/etc/pve/storage.cfg"

# Backup
cp "$cfg" "$cfg.bak"

# Remove the lvmthin: local-lvm block (including all indented lines)
sed -i '/^lvmthin: local-lvm/,/^[^[:space:]]/ { /^lvmthin: local-lvm/d; /^[[:space:]]/d }' "$cfg"

# Trim leading blank lines
sed -i '/./,$!d' "$cfg"

# Restart services
cat "$cfg"
systemctl restart pvestatd pveproxy
```

### 1.4 Add Missing Content Types to local Storage

**Critical:** After removing `local-lvm`, the remaining `dir: local` storage may only have `content iso,vztmpl,backup,import`. You **must** add `images,rootdir` or you cannot create VMs/LXCs — there will be no default storage for disk images and containers.

```bash
cfg="/etc/pve/storage.cfg"

# Ensure local storage has ALL content types
cat > "$cfg" <<'STORAGE_EOF'
dir: local
        path /var/lib/vz
        content rootdir,images,iso,vztmpl,backup,import
STORAGE_EOF

# Restart to pick up changes
systemctl restart pvestatd pveproxy
```

Verify in web UI: **Datacenter > Storage > local** should show all content types enabled.

---

## 2. Repository Configuration

**Goal:** Disable enterprise/ceph repos (require subscription) and enable the no-subscription repo.

### 2.1 Disable Enterprise Repos

```bash
for f in /etc/apt/sources.list.d/pve-enterprise.list \
         /etc/apt/sources.list.d/ceph.list; do
    if [ -f "$f" ]; then
        mv "$f" "$f.disabled"
        echo "Disabled: $f"
    fi
done
```

> **Important:** Both `pve-enterprise.list` **AND** `ceph.list` must be disabled. The PVE installer enables both by default.

### 2.2 Add No-Subscription Repo

```bash
cat > /etc/apt/sources.list.d/pve-no-subscription.list <<'REPO_EOF'
deb http://download.proxmox.com/debian/pve trixie pve-no-subscription
REPO_EOF
```

> Note: `trixie` = Debian 13. Adjust if on a different Debian base.

### 2.3 Update Package Lists

```bash
apt update
```

If DNS resolution fails (see Section 4), fix DNS first then re-run `apt update`.

---

## 3. Remove Subscription Nag Screen

**Goal:** Kill the "No valid subscription" warning popup in the web UI.

```bash
js="/usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js"

# Backup
cp "$js" "$js.bak"

# Patch: replace the status check with literal false
sed -i "s/data.status !== 'Active'/false/g" "$js"

# Restart web UI
systemctl restart pveproxy
```

Verify: Log into the web UI — no subscription warning should appear.

---

## 4. Fix DNS Resolution

**Problem:** PVE 9.2 PXE installs often get `nameserver 127.0.0.1` in `/etc/resolv.conf`, but no local DNS server is running.

```bash
cat > /etc/resolv.conf <<'DNS_EOF'
search ai.home
nameserver 192.168.7.7
nameserver 192.168.18.1
nameserver 1.1.1.1
DNS_EOF
```

> Adjust nameservers to match your network. `192.168.7.7` is the Technitium DNS in the Iron Legion fleet.

After fixing DNS, re-run:
```bash
apt update
```

---

## 5. Verification Checklist

Run these on each node to confirm everything is clean:

```bash
echo "=== Storage ==="
df -h /
lvs
echo ""
echo "=== Repos ==="
cat /etc/apt/sources.list.d/*.list 2>/dev/null | grep -v disabled || echo "no active list files"
echo ""
echo "=== Nag Patch ==="
grep -c "false" /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js
echo ""
echo "=== DNS ==="
cat /etc/resolv.conf
echo ""
echo "=== Apt Test ==="
apt update
```

Expected results:
- `pve-root` is ~930G+ and only `root` + `swap` LVs exist
- No `local-lvm` in `/etc/pve/storage.cfg`
- `local` storage has `content rootdir,images,iso,vztmpl,backup,import`
- No `.list` files with `enterprise` or `ceph` in the name (only `pve-no-subscription.list`)
- `proxmoxlib.js` contains `false` in the subscription check line
- `apt update` completes without "Temporary failure resolving" errors

---

## 6. Known Issues & Fixes

| Issue | Cause | Fix |
|-------|-------|-----|
| local-lvm still shows in UI | LV removed but storage.cfg still has definition | Run Section 1.3 |
| Cannot create VM/LXC | `local` storage missing `images,rootdir` | Run Section 1.4 |
| apt update fails with DNS errors | resolv.conf points to 127.0.0.1 | Run Section 4 |
| Enterprise repo still active | Only pve-enterprise disabled, ceph.list left behind | Run Section 2.1 (disable BOTH) |
| Subscription nag still appears | pveproxy not restarted after patch | Run Section 3 + restart pveproxy |

---

*Last updated: 2026-05-31*