MooseFS integration for Proxmox VE

This plugin enables native support for MooseFS as a storage backend in Proxmox VE.

This project is under active development but should still be considered beta.

⚠️ Keep backups of your data. Snapshots are unsafe and may result in data loss. Snapshot support is still under active development and will remain experimental until this warning is removed. ⚠️⚠️⚠️ There is currently a known snapshotting issue with pve-moosefs running in mfsbdev mode discovered 2025-10-04 - a fix is coming ASAP, eta 1-3 days.

• Native MooseFS support in Proxmox VE
• Support for MooseFS clusters with passwords and subfolders
• Live VM migration across Proxmox hosts with MooseFS-backed storage
• Clean unmounting when MooseFS storage is removed
• MooseFS block device (mfsbdev) support for high performance
• Instant snapshots and near instant rollbacks

• Instant cloning

• Proxmox VE 9.0 or newer

1. Upgrade to Proxmox 9.0
2. Download and install the .deb package from the Releases page.

1. Upgrade to Proxmox 9.0

2. Clone this repository:

   git clone https://github.com/yourusername/pve-moosefs.git
   cd pve-moosefs

3. Build the package:

   make

4. Install it:

   dpkg -i *.deb

1. Open the Proxmox Web Interface
2. Navigate to Datacenter → Storage
3. Click Add → MooseFS and complete the wizard

pvesm add moosefs moosefs-vm-storage --path /mnt/mfs

This command creates a custom storage named moosefs-vm-storage using the MooseFS plugin.

• --mfsmaster <hostname> — specify the MooseFS metadata server
• --mfspassword <password> — use if your MooseFS export requires authentication
• --mfssubfolder <folder> — mount a subfolder rather than the root of the MooseFS volume
• --mfsport <port> — mount a MooseFS filesystem that uses a custom master port

Contributors:

• @Zorlin — Principal author, testing, automation and quality control
• @anwright — major fixes, snapshots, and cleanup
• @pkonopelko — general advice and support

Inspiration and references (for plugin skeleton and packaging):

• mityarzn/pve-storage-custom-mpnetapp
• ServeTheHome Forums
• Official Proxmox GlusterFS and CephFS storage plugins

Critical Fixes:

• Fixed: Multi-disk VMs can now hot-migrate successfully (#54)

  • Added intelligent retry logic with exponential backoff for NBD mapping
  • Resolves "link exists" errors when migrating VMs with multiple disks
  • Improved race condition handling during concurrent disk operations

• Fixed: Windows VMs with TPM 2.0 now start correctly (#51)

  • Enhanced TPM state directory path resolution
  • Automatic creation of TPM directories with proper permissions
  • Ensures compatibility with Windows 11 TPM requirements

• Fixed: LXC storage migration safety and data corruption (#50)

  • Graceful cleanup on allocation failures prevents orphaned resources
  • Improved error handling prevents cascade failures during cleanup
  • Snapshot operations now safely unmap NBD before execution

• Fixed: LXC resize and creation with mfsbdev (#52)

  • Create image files before NBD mapping (mfsbdev requirement)
  • Better error messages for NBD module and device availability
  • Improved NBD device handling and LXC compatibility

• Fixed: LXC snapshot backups with taint mode (#48)

  • Proper path untainting for vzdump compatibility
  • Enhanced snapshot operation safety

• Fixed: NBD daemon crashes during snapshot operations (#53)

  • Added with_nbd_unmapped wrapper for safe snapshot operations
  • Prevents daemon crashes by unmapping before snapshots

• Fixed: Helpful error messages when MooseFS master unreachable (#38)

  • Clearer diagnostics for connection issues

New Features:

• Multiple MooseFS cluster support via mfsnbdlink property
• Rust-based patch generator tool for easier development
• UI support for mfsnbdlink configuration

Reliability Enhancements:

• Graceful cleanup on allocation failures
• Snapshot safety wrapper prevents daemon crashes
• Improved NBD device collision detection
• Better error handling for concurrent storage operations
• Enhanced logging for troubleshooting

Known Issues:

• #47: Post-migration mfsbdev state preservation under investigation

Note: This release represents a major step toward production-grade reliability. As always, maintain backups and test in non-production environments first.

• Improve mount detection, fix subfolder bug in bdev adapter
• Improve NBD handling
• Only allow "raw" image type in bdev mode
• Further NBD logic fixes and tuning
• Fix issue with free_image SUPER delegation
• Fix volume attributes/notes
• Switch to mfsrmsnapshot instead of rm for snapshots
• Add mfsport support
• Support optional password for mfsbdev

• Fixes rare but major crash condition for VMs and LXCs
• Adds support for Proxmox VE 9.0

• Improvements to LXC snapshot support
• Reduced debugging log noise

• Multiple small and defensive fixes
• Improved support for LXC
• Enhancements for live migration, unmapping, and cloning

• Full support for MooseFS block device (mfsbdev)

• Basic mfsbdev support added

• GUI support for container storage
• Allowed leading / in mfssubfolder paths

• Core features implemented
• MooseFS mount/unmount and shared storage setup
• Snapshots not functional in this version