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Cockpit ZFS Manager

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An interactive ZFS on Linux admin package for Cockpit.

WARNING!

Cockpit ZFS Manager is currently pre-release software. Use at your own risk!

Requirements

  • Cockpit: 201+
  • NFS (Optional)
  • Samba: 4+ (Optional)
  • ZFS: 0.8+
Tested Distributions
  • Arch Linux
  • CentOS Linux 8
  • Debian 10
  • Fedora 31
  • Oracle Linux Server 8
  • Proxmox VE 6
  • Red Hat Enterprise Linux 8
  • Ubuntu 18.04 LTS
  • Ubuntu 19.10

Screenshots

Screenshots using Cockpit 217 on Oracle Linux 8.1 with UEK R6.

Installation

Copy zfs folder to cockpit

$ git clone https://github.com/optimans/cockpit-zfs-manager.git
$ sudo cp -r cockpit-zfs-manager/zfs /usr/share/cockpit

Samba

Auto generated snapshot names are created in YYYY.MM.DD-HH.MM.SS format.

It is recommended to add the following properties to the Samba configuration file to allow access to Previous Versions in Windows Explorer:

$ sudo nano /etc/samba/smb.conf

Append to [global] section or individual share sections

shadow: snapdir = .zfs/snapshot
shadow: sort = desc
shadow: format = %Y.%m.%d-%H.%M.%S
shadow: localtime = yes	
vfs objects = acl_xattr shadow_copy2

SELinux

If using SELinux in enforcing mode, it is recommended to enable the boolean states for Samba:

$ sudo setsebool -P samba_export_all_ro=1 samba_export_all_rw=1

Using Cockpit ZFS Manager

Login to Cockpit as a privileged user and click ZFS from the navigation list.

A Welcome to Cockpit ZFS Manager modal will display and allow you to configure initial settings.

Note: Inline help is currently available in modals. Documentation will be created at a later date.

Caveats

Storage Pools

New storage pools are created with the following properties set (not visible in Create Storage Pool modal):

  • aclinherit=passthrough
  • acltype=posixacl
  • casesensitivity=sensitive
  • normalization=formD
  • sharenfs=off
  • sharesmb=off
  • utf8only=on
  • xattr=sa

File Systems

New file systems are created with the following properties set (not visible in Create File System modal):

  • normalization=formD
  • utf8only=on

Passphrase is currently supported for encrypted file systems.

If SELinux contexts for Samba is selected, the following properties are set:

  • context=system_u:object_r:samba_share_t:s0
  • fscontext=system_u:object_r:samba_share_t:s0
  • defcontext=system_u:object_r:samba_share_t:s0
  • rootcontext=system_u:object_r:samba_share_t:s0

Samba

ZFS always creates shares in /var/lib/samba/usershares folder when ShareSMB property is enabled. This is also the case even if Cockpit ZFS Manager is managing the shares. To avoid duplicate shares of the same file system, it is recommended to configure a different usershares folder path if required or to disable usershares in the Samba configuration file.

Note: Newer versions of Samba may require the usershares folder to be set to a new path instead of disabled in configuration:

$ sudo mkdir /var/lib/samba/usershares2
$ sudo nano /etc/samba/smb.conf

Append/Change to [global] section

usershare path = /var/lib/samba/usershares2

If enabled, Cockpit ZFS Manager manages shares for the file systems only. Samba global configuration will need to be configured externally.

More Information

Guides


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