zsync/README.md

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---- THIS IS A CLONE OF THE ORIGINAL REPOSITORY ON git.bashclub.org ----
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# zsync
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ZFS replication script by Thorsten Spille <thorsten@spille-edv.de>
- replicates ZFS filesystems/volumes with user parameter bashclub:zsync (or custom name) configured
- creates optional snapshot before replication (required zfs-auto-znapshot)
- parameter setting uses zfs hierarchy on source
- mirrored replication with existing snapshots (filtered by snapshot_filter)
- pull/local replication only
- auto creates full path on target pool, enforce com.sun:auto-snapshot=false, inherits mountpoint and sets canmount=noauto
- raw replication
- tested on Proxmox VE 7.x/8.x
- ssh cipher auto selection
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## Installation
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#### Install via Repository (Debian / Ubuntu / Proxmox)
~~~
echo "deb [signed-by=/usr/share/keyrings/bashclub-archive-keyring.gpg] https://apt.bashclub.org/release bookworm main" > /etc/apt/sources.list.d/bashclub.list
wget -O- https://apt.bashclub.org/gpg/bashclub.pub | gpg --dearmor > /usr/share/keyrings/bashclub-archive-keyring.gpg
apt update
apt install bashclub-zsync
~~~
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#### Download and make executable
~~~
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wget -q --no-cache -O /usr/bin/bashclub-zsync https://gitlab.bashclub.org/bashclub/zsync/-/raw/main/bashclub-zsync/usr/bin/bashclub-zsync
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chmod +x /usr/bin/bashclub-zsync
bashclub-zsync
~~~
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## Documentation
[DOCUMENTATION_DE.md](DOCUMENTATION_DE.md)
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## Configuration
After first execution adjust the default config file `/etc/bashclub/zsync.conf`:
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~~~
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# replication target path on local machine
target=pool/dataset
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# ssh address of remote machine
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source=user@host
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# ssh port of remote machine
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sshport=22
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# zfs user parameter to identify filesystems/volumes to replicate
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tag=bashclub:zsync
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# pipe separated list of snapshot name filters
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snapshot_filter="hourly|daily|weekly|monthly"
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# minimum count of snapshots per filter to keep
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min_keep=3
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# number of zfs snapshots to keep on source (0 or 1 = snapshot function disabled)
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zfs_auto_snapshot_keep=0
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# make snapshot via zfs-auto-snapshot before replication
zfs_auto_snapshot_label="backup"
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# disable checkzfs with value > 0
checkzfs_disabled=0
# set checkzfs parameter "--prefix"
checkzfs_prefix=zsync
# set checkzfs maximum age of last snapshot in minutes (comma separated => warn,crit)
checkzfs_max_age=1500,6000
# set checkzfs maximum count of snapshots per dataset (comma separated => warn,crit)
checkzfs_max_snapshot_count=150,165
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~~~
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### Define a cronjob
#### cron.d example
File: /etc/cron.d/bashclub-zsync
~~~
00 23 * * * root /usr/bin/bashclub-zsync -c /etc/bashclub/zsync.conf > /var/log/bashclub-zsync/zsync.log
~~~
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#### cron.{hourly|daily|weekly|monthly}
File: /etc/cron.hourly/bashclub-zsync
~~~
/usr/bin/bashclub-zsync -c /etc/bashclub/zsync.conf > /var/log/bashclub-zsync/zsync.log
~~~
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# Author
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### Thorsten Spille
[<img src="https://storage.ko-fi.com/cdn/brandasset/kofi_s_tag_dark.png" rel="Support me on Ko-Fi">](https://ko-fi.com/thorakel)