Technical
Data on ZFS Dataset Mysteriously Gone: Check Mountpoints Before You Panic
Data on ZFS dataset mysteriously gone? It's usually a mountpoint or bind mount issue, not actual loss. Here's the diagnostic order that finds it.
Technical
ZFS Pool Suspended: Offline the Disk, Clear the Errors, Online It Again
A SUSPENDED ZFS pool blocks all I/O, so zpool clear and scrub won't work until you offline the problem disk. Here's the order that actually recovers it.
Technical
Proxmox iSCSI Uses Management Network Instead of Storage Network: Fix the Interface Binding
Proxmox iSCSI traffic goes over the management network because open-iscsi binds by destination IP.
Technical
Proxmox ZFS storage summary: map Size, Used, and Avail to zpool list and zfs list
Proxmox ZFS storage summary shows Size, Used, and Avail from zpool list, but the per-dataset numbers come from zfs list. Here's the mapping.
Technical
Proxmox snippets feature: enable storage, upload files, wire them into cloud-init and hookscripts
Proxmox snippets are small text files for cloud-init and hookscripts. Here's how to enable snippet storage, upload files, and reference them in your VMs.
Technical
LVM thin in the same VG as virtual machines: yes, you can mix them
You can mix LVM-thin and regular LVM volumes in the same Proxmox volume group. Here's the storage.cfg setup and the thin pool exhaustion caveat.
Technical
Proxmox exclude disk from snapshot: move it to a storage that doesn’t support snapshots
Proxmox has no per-disk snapshot toggle. To exclude a disk from a VM snapshot, move it to a storage that doesn't support snapshots, like a directory or NFS
Technical
vzdump Backup Retention Off-Site Transfer: Prune Copies After They Leave
Retention for vzdump backups after off-site transfer means pruning both local and remote copies. Here's the script I'd run and when PBS is worth it.
Technical
Ceph OSDs not being able to be configured in fully routed Environment: fix the network first
Ceph OSDs not being able to be configured in a fully routed environment usually means the public and cluster networks aren't reachable. Here's the fix.
Technical
How to Download Files from Proxmox Node: LXC Rootfs, VM Disks, and Backups
How to download files from Proxmox node depends on what you mean: a file inside an LXC, a VM disk image, or a backup.