zfs_nas

Table of Contents

1. Description
2. Setup - The basics of getting started with zfs_nas
   • What zfs_nas affects
   • Setup requirements
   • Beginning with zfs_nas
3. Usage - Configuration options and additional functionality
4. Limitations - OS compatibility, etc.
5. Development - Guide for contributing to the module

Description

This modules is the successor of the great Tiny NAS :-) In comparison with Tiny_NAS, it allows the normal load that you'd expect from a NAS.

The module sets up two servers sharing a filesystem through NFS (SMB is a roadmap feature). Development is at an early stage: there are oddities described in the Limitations section.

Setup

What zfs_nas affects

You have an option to let this module configure monit or you can configure monit yourself. I recommend to set a check interval between 15 and 60 seconds. Check interval in monit is called "cycle". We run our monit cheks every "1 cycles" (hence every 15 seconds). There are few modules available to configure monit.

Setup Requirements

• sanoid package is not available. It can be compiled following the instructions: Install Sanoid

• zfs repositories and gpg key are needed in CentOS (I haven't tested CentOS 8 yet) and I am using the package provided by zfs

Beginning with zfs_nas

Zfs_nas will will set cron jobs inside the file /etc/cron.d/zfs-auto-snapshot.

Furthermore, every 15 seconds, syncoid will run on the slave, to pull data from the master.

The zpool is created with the name zfs_nas. I don't see a reason to customize the name.

Usage

ZFS NAS server

In hiera you could have something as following:

---
nodes_hostnames:
  - "test-zfs01.domain.org"
  - "test-zfs02.domain.org"
nodes_ip4:
  - '192.168.2.92'
  - '192.168.2.93'
nodes_ip6:
  - '2001:.....:233'
  - '2001:.....:234'
vip_ip4: '192.168.2.94'
vip_ip4_subnet: 22
vip_ip6: '2001:.....:235'
vip_ip6_subnet: 64
pool_disks: 'sdb'
zfs_shares:
  academy:
    ensure: present
    client_list:
      - 'rw=@192.168.2.24,sec=insecure,async,no_root_squash,no_subtree_check'
      - 'rw=@192.168.2.25,sec=insecure,async,no_root_squash,no_subtree_check'
      - 'rw=@2001.....12c,sec=,insecure,async,no_root_squash,no_subtree_check'
      - 'rw=@2001.....12d,sec=insecure,async,no_root_squash,no_subtree_check'
ssh_pub_key: 'AAAAB3N.......zNTg/NjqJ'
ssh_id_rsa: >
    ENC[PKCS7,Mblahblahblah....
    ...
    kjhkhkh]

And you call the module as following:

$ssh_id_rsa = Sensitive(lookup('ssh_id_rsa'))

class { 'zfs_nas':
  zfs_shares      => lookup('zfs_shares'),
  pool_disks      => lookup('pool_disks'),
  nodes_hostnames => lookup('nodes_hostnames'),
  nodes_ip4       => lookup('nodes_ip4'),
  nodes_ip6       => lookup('nodes_ip6'),
  vip_ip4         => lookup('vip_ip4'),
  vip_ip4_subnet  => lookup('vip_ip4_subnet'),
  vip_ip6         => lookup('vip_ip6'),
  vip_ip6_subnet  => lookup('vip_ip6_subnet'),
  ssh_id_rsa      => $ssh_id_rsa,
  ssh_pub_key     => lookup('ssh_pub_key');
}

ZFS Nas client

zfs_nas::client { '/test':
  ensure => present,
  server => 'test-zfs.domain.org',   # this is the VIP of the cluster
  share  => '/zfs_nas/test_influx';
}

Limitations

• sanoid package must be compiled following the instructions available here: Install Sanoid
• repositories are only needed for CentOS, and they are not handled properly (I didn't find a place to fetch the GPG key): this module will install the repository through the package provided by zfsonlinux
• I started playing with Litmus and there is no unit test available yet (you trust what I'm doing)

Development

Feel free to make pull requests and/or open issues on Zfs Nas GitHub Repository

Release Notes/Contributors/Etc.

The idea for this module originated from this post: How to perform incremental / continuous backups of zfs pool?