bashclub-zfs

zfs snapshot send/receive supporting pull

Basic Usage

bashclub-zfs remote_host:src_pool/fs dest_pool

This will create a new snapshot on the remote host (via SSH) and "send" it to your local host where it will be received into dest_pool/fs.

I use this on my laptop to backup my home server to a removable drive. This pull functionality was something I had trouble finding in the other similar scripts out there, and was the main reason I wrote this.

Features

• pull from a remote source to a local (or remote) destination
  • (source and destination can each be either local or remote)
• keeps its own set of snapshots
• SSH connection is made with regular user, and uses sudo for ZFS commands
• sends incremental snapshots after first run

Features and Limitations

• always uses sudo
• always creates recursive snapshots (zfs snapshot -r) - But better use 02pull to sync single Datasets
• select to send full replication stream (zfs send -R) or Intermediate Snapshots (zfs send -I), default without sending Full and Intermediate!
• destination should be specified as the parent of the desired destination (zfs recv -e)

Install/Requirements

• There is no need to install, just clone/download where you like and run
• Created & tested with ZFS On Linux on Ubuntu 16.04
• Requires bash(1), date(1), sudo(8), and zfs(8)
• Requires ssh(1) for remote hosts
  • If your SSH environment requires a custom port or other configuration options, that will need to be done in your ssh_config(5) file

Usage/Examples

bashclub-zfs [-hvq] [-t tag] [-k keep] [-d dateopts] src dest
  use zfs send/recv to push/pull snapshots

  !This Release is default set to send raw. This means you can send encrypted and compressed Datasets 1:1!
  src          the source fs, specified as [host:]pool/path/to/fs
  dest         the destination fs parent, specified as [host:]pool/path/to/fs
               (the final path component of src will be appended to dest)
  -p           ssh port
  -h           help
  -v           verbose mode
  -C           SSH Compression - obsolete if send_opts="-v -w" are set to raw
  -R           ZFS Re-Init
  -I           Send intermediate Snapshots
  -q           quiet mode
  -t tag       tag to use for naming snapshots (default: backup-zfs)
  -k keep      number of snapshots to keep on src (default: 5)
  -d dateopts  options for date(1) - used to name the snapshots (default: +%F_%T)
  -s           store mode - output snaps from local fs to ssh server
  -r           read mode - read snaps from ssh server to local fs
  -g gpg-id    gpg recipient key id (store mode only)

# Local mode: Backup tank/system to backup/tank/system
bashclub-zfs tank/system backup/tank

# Pull mode: Backup tank/system on tankhost to localhost
bashclub-zfs tankhost:tank/system backup/tank

# Push mode: Backup tank/system on localhost to backuphost
bashclub-zfs tank/system backuphost:backup/tank

# Double remote mode: Backup tank/system on tankhost to backuphost
bashclub-zfs tankhost:tank/system backuphost:backup/tank

# In this mode, your client will establish two separate SSH sessions,
# connect them with a pipe, and pull data from one while pushing to the
# other. No data will be stored locally.