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ADR-007: FreeNAS vs TrueNAS Module Naming

Date: 2026-05-15
Status: Accepted
Deciders: Kevin Adams

Context

The Perl module is named FreeNAS.pm and installs to PVE::Storage::LunCmd::FreeNAS. The iscsiprovider value stored in Proxmox VE's /etc/pve/storage.cfg is freenas. All existing user configurations reference this name.

The product was renamed from FreeNAS to TrueNAS in 2020. The package is in the process of being modernized (v3.x goal is PVE::Storage::Custom::TrueNASPlugin).

Decision

v2.x (current): Keep FreeNAS.pm and iscsiprovider freenas.

Changing the filename or the iscsiprovider value in v2.x would silently break every existing user's storage configuration — Proxmox would fail to load the backend, and VMs with attached storage would become inaccessible. The backward-compat cost is too high for a minor release.

v3.x (new Custom plugin): Use TrueNAS.pm (or embed in TrueNASPlugin.pm) and type truenas.

The v3.x architecture introduces a new storage type (truenas) via PVE::Storage::Custom::TrueNASPlugin. This is a clean break — users explicitly create a new truenas-type storage and migrate their VMs. The old freenas iSCSI provider continues to work in parallel during the transition.

Migration Path

When v3.x ships:

Users create a new truenas-type storage pointing at the same TrueNAS server
Migrate VMs from old freenas-provider storage to new truenas storage using qm move-disk / pvesm commands
Remove the old freenas-provider storage definition
The v3.x postrm removes FreeNAS.pm and reverses ZFSPlugin patches; the v2.x files are no longer needed

Internal Variable Naming

Within FreeNAS.pm (v2.x): continue using freenas_* variable names — changing them mid-v2.x would be a pointless churn commit with no user benefit.

Within the new TrueNASPlugin.pm (v3.x): use truenas_* for all new variables. New user-facing config keys should be truenas_*. Existing freenas_* keys are mapped as aliases for backward compat during the transition window.

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