# 06 - Troubleshooting

Common interventions for pipeline failures or hardware reuse.

## LVM Provisioning Failures (Dirty Disks)
If Ansible halts at the LVM Volume Group creation phase, the target block device likely retains partition data. Ensure you are targeting the correct device and wipe the signatures manually:

```bash
# Execute on the specific Proxmox node
wipefs -a /dev/sdX
```
Rerun the playbook after clearing the disk.

## Corosync Quorum Loss
If execution hangs on `pvecm status` or clustering commands, Corosync has lost quorum. In a 3-node cluster, 2 nodes must be online. To force a single active node to regain quorum and unblock operations (for recovery only):

```bash
pvecm expected 1
```

## Linstor HA VIP Unreachable
If the controller does not initialize, verify the promoter plugin state:
```bash
systemctl status drbd-reactor
journalctl -u drbd-reactor -n 50
```
Verify switch layer allows IP spoofing / MAC address floating for the defined `ha_vip`.

## Complete Cluster Reset
To obliterate Corosync configuration and reset the node to a standalone state:
```bash
systemctl stop pve-cluster
pmxcfs -l
rm /etc/pve/corosync.conf
rm -rf /etc/corosync/*
killall pmxcfs
systemctl start pve-cluster
```
*Note: If DRBD configurations are active, an OS reinstall is significantly faster and safer than manual DRBD block device teardown.*