This is an old revision of the document!

ZFS Snapshot Send/Receive

Local ZFS snapshots are uploaded to a remote server (backup) over SSH, using the utility znapzend to manage the snapshot schedule.

http://www.znapzend.org/

The ZFS volume of the given name must exist on the remote node

*** WARNING: destination 'root@destserver:data/test' does not exist, will be ignored! ***

1. znapzend is installed as a deb package (systemd service) using: https://github.com/Gregy/znapzend-debian

2. Create a shared key for SSH to allow password-less login from source to dest server as root

ssh-keygen
ssh-copy-id -i /root/.ssh/id_rsa.pub root@desterver

3. Create a snapshot schedule consisting of a local SRC schedule, and the remote DST schedule to send the snapshots.

Keep snapshots for 1week, with a snapshot every 30 minutes

# znapzendzetup create --recursive SRC '1week=>30min' data/test DST '1week=>30min' root@destserver:data/test

Reload the config of the znapzend daemon

# systemctl reload znapzend.service

4. The backup schedule is saved as ZFS volume properties

# zfs get all data/test | grep org.znapzend data/test org.znapzend:tsformat %Y-%m-%d-%H%M%S local data/test org.znapzend:pre_znap_cmd off local data/test org.znapzend:dst_0 root@destserver:data/test local data/test org.znapzend:mbuffer off local data/test org.znapzend:dst_0_plan 1weeks⇒30minutes local data/test org.znapzend:enabled on local data/test org.znapzend:zend_delay 0 local data/test org.znapzend:recursive on local data/test org.znapzend:mbuffer_size 1G local data/test org.znapzend:post_znap_cmd off local data/test org.znapzend:src_plan 1weeks⇒30minutes local

Watch for local snapshots to be created:

# zfs list -t snap NAME USED AVAIL REFER MOUNTPOINT data/test@2017-08-27-100000 0 - 128K - data/test@2017-08-27-103000 0 - 128K -

Mr Zesty's BrainDump

User Tools

Site Tools

ZFS Snapshot Send/Receive

Page Tools