Utility scripting for managing daily backups with duplicity onto an scp-accessible remote host to make it into a series of monthly snapshots with stashed daily sub-sequences.
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Ralph Rönnquist 6c0b4eac62
3 weeks ago
debian spelling 3 weeks ago
.gitignore ignore generated files 3 weeks ago
Makefile initial setup 3 weeks ago
README.adoc editorial 3 weeks ago
duplicity-daily initial setup 3 weeks ago
duplicity-daily.conf initial setup 3 weeks ago
dupltool initial setup 3 weeks ago


Backup Control Scripting

The script dupltool is a wrapper for duplicity that usually just invokes duplicity with all arguments passed on, but every month it first makes a stash of the most recent succession of daily snapshots, so that the duplicity run at this time is a monthly snapshot.

The script duplicity-daily is a simple control script for daily backup that uses configuration from /etc/duplicity-daily.conf that defines which backups to make, and from ~/.ssh/config as to how to connect to the target host (or hosts).

Administration Example

This is a /etc/duplicity-daily sample

The above sample declares backup (without encryption) of directory trees /root, /etc, /home to host backup (as declared in ~/.ssh/config) into directories under the user’s directory backup.

This is a ~/.ssh/config sample
host backup
    hostname backup.lan
    user thishost
    identityfile ~/.ssh/thishost-backup
    ServerAliveInterval 15
    ServerAliveCountMax 4
    TCPKeepAlive yes
    RekeyLimit 100M
    IPQoS reliability

Note that for the above sample, the backup client root@thishost has prepared a password-less ssh key to thishost@backup.lan so that daily backup can happen without operator intervention.

Debian Package

A debian package is built with

$ make deb

provided that the build environment is set up, i.e. an ordinary debian package building environment.

The package is then installed with

# dpkg -i ../buckap_<TAB>

Doing so will install /usr/bin/dupltool and /etc/cron.daily/duplicity-daily, as well as providing an example /etc/duplicity-daily.conf (incuding rudimentary instructions).