2016-08-04 23:59:40 +02:00
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# backup-zfs
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zfs snapshot send/receive supporting pull
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2016-08-05 01:30:45 +02:00
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## Basic Usage
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backup-zfs remote_host:src_pool/fs dest_pool
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This will create a new snapshot on the remote host (via SSH) and "send" it to
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your local host where it will be received into dest_pool/fs.
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I use this on my laptop to backup my home server to a removable drive. This
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*pull* functionality was something I had trouble finding in the other similar
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scripts out there, and was the main reason I wrote this.
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## Features
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* pull from a remote source to a local (or remote) destination
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* (source and destination can each be either local or remote)
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* keeps its own set of snapshots
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* SSH connection is made with regular user, and uses sudo for ZFS commands
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* sends incremental snapshots after first run
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## Limitations
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* always uses sudo
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* always creates recursive snapshots (`zfs snapshot -r`)
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* always sends full replication stream (`zfs send -R`)
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2016-08-05 01:33:36 +02:00
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* destination should be specified as the *parent* of the desired destination
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(`zfs recv -e`)
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2016-08-05 01:30:45 +02:00
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## Install/Requirements
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* There is no need to install, just clone/download where you like and run
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* Created & tested with [ZFS On Linux][1] on Ubuntu 16.04
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* Requires bash(1), date(1), sudo(8), and zfs(8)
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* Requires ssh(1) for remote hosts
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* If your SSH environment requires a custom port or other configuration
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options, that will need to be done in your ssh_config(5) file
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## Usage/Examples
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backup-zfs [-hvq] [-t tag] [-k keep] [-d dateopts] src dest
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use zfs send/recv to push/pull snapshots
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src the source fs, specified as [host:]pool/path/to/fs
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dest the destination fs parent, specified as [host:]pool/path/to/fs
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(the final path component of src will be appended to dest)
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-h help
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-v verbose mode
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-q quiet mode
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-t tag tag to use for naming snapshots (default: backup-zfs)
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-k keep number of snapshots to keep on src (default: 5)
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-d dateopts options for date(1) - used to name the snapshots (default: +%F_%T)
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# Local mode: Backup tank/system to backup/tank/system
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backup-zfs tank/system backup/tank
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# Pull mode: Backup tank/system on tankhost to localhost
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backup-zfs tankhost:tank/system backup/tank
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# Push mode: Backup tank/system on localhost to backuphost
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backup-zfs tank/system backuphost:backup/tank
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# Double remote mode: Backup tank/system on tankhost to backuphost
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backup-zfs tankhost:tank/system backuphost:backup/tank
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# In this mode, your client will establish two separate SSH sessions,
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# connect them with a pipe, and pull data from one while pushing to the
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# other. No data will be stored locally.
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[1]: https://github.com/zfsonlinux/zfs
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