227 lines
7.6 KiB
XML
227 lines
7.6 KiB
XML
<chapter xmlns="http://docbook.org/ns/docbook"
|
|
xmlns:xlink="http://www.w3.org/1999/xlink"
|
|
xmlns:xi="http://www.w3.org/2001/XInclude"
|
|
version="5.0"
|
|
xml:id="module-borgbase">
|
|
<title>BorgBackup</title>
|
|
<para>
|
|
<emphasis>Source:</emphasis>
|
|
<filename>modules/services/backup/borgbackup.nix</filename>
|
|
</para>
|
|
<para>
|
|
<emphasis>Upstream documentation:</emphasis>
|
|
<link xlink:href="https://borgbackup.readthedocs.io/"/>
|
|
</para>
|
|
<para>
|
|
<link xlink:href="https://www.borgbackup.org/">BorgBackup</link> (short: Borg)
|
|
is a deduplicating backup program. Optionally, it supports compression and
|
|
authenticated encryption.
|
|
</para>
|
|
<para>
|
|
The main goal of Borg is to provide an efficient and secure way to backup
|
|
data. The data deduplication technique used makes Borg suitable for daily
|
|
backups since only changes are stored. The authenticated encryption technique
|
|
makes it suitable for backups to not fully trusted targets.
|
|
</para>
|
|
<section xml:id="module-services-backup-borgbackup-configuring">
|
|
<title>Configuring</title>
|
|
<para>
|
|
A complete list of options for the Borgbase module may be found
|
|
<link linkend="opt-services.borgbackup.jobs">here</link>.
|
|
</para>
|
|
</section>
|
|
<section xml:id="opt-services-backup-borgbackup-local-directory">
|
|
<title>Basic usage for a local backup</title>
|
|
|
|
<para>
|
|
A very basic configuration for backing up to a locally accessible directory
|
|
is:
|
|
<programlisting>
|
|
{
|
|
opt.services.borgbackup.jobs = {
|
|
{ rootBackup = {
|
|
paths = "/";
|
|
exclude = [ "/nix" "/path/to/local/repo" ];
|
|
repo = "/path/to/local/repo";
|
|
doInit = true;
|
|
encryption = {
|
|
mode = "repokey";
|
|
passphrase = "secret";
|
|
};
|
|
compression = "auto,lzma";
|
|
startAt = "weekly";
|
|
};
|
|
}
|
|
};
|
|
}</programlisting>
|
|
</para>
|
|
<warning>
|
|
<para>
|
|
If you do not want the passphrase to be stored in the world-readable
|
|
Nix store, use passCommand. You find an example below.
|
|
</para>
|
|
</warning>
|
|
</section>
|
|
<section xml:id="opt-services-backup-create-server">
|
|
<title>Create a borg backup server</title>
|
|
<para>You should use a different SSH key for each repository you write to,
|
|
because the specified keys are restricted to running borg serve and can only
|
|
access this single repository. You need the output of the generate pub file.
|
|
</para>
|
|
<para>
|
|
<programlisting>
|
|
# sudo ssh-keygen -N '' -t ed25519 -f /run/keys/id_ed25519_my_borg_repo
|
|
# cat /run/keys/id_ed25519_my_borg_repo
|
|
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAID78zmOyA+5uPG4Ot0hfAy+sLDPU1L4AiIoRYEIVbbQ/ root@nixos</programlisting>
|
|
</para>
|
|
<para>
|
|
Add the following snippet to your NixOS configuration:
|
|
<programlisting>
|
|
{
|
|
services.borgbackup.repos = {
|
|
my_borg_repo = {
|
|
authorizedKeys = [
|
|
"ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAID78zmOyA+5uPG4Ot0hfAy+sLDPU1L4AiIoRYEIVbbQ/ root@nixos"
|
|
] ;
|
|
path = "/var/lib/my_borg_repo" ;
|
|
};
|
|
};
|
|
}</programlisting>
|
|
</para>
|
|
</section>
|
|
|
|
<section xml:id="opt-services-backup-borgbackup-remote-server">
|
|
<title>Backup to the borg repository server</title>
|
|
<para>The following NixOS snippet creates an hourly backup to the service
|
|
(on the host nixos) as created in the section above. We assume
|
|
that you have stored a secret passphrasse in the file
|
|
<code>/run/keys/borgbackup_passphrase</code>, which should be only
|
|
accessible by root
|
|
</para>
|
|
<para>
|
|
<programlisting>
|
|
{
|
|
services.borgbackup.jobs = {
|
|
backupToLocalServer = {
|
|
paths = [ "/etc/nixos" ];
|
|
doInit = true;
|
|
repo = "borg@nixos:." ;
|
|
encryption = {
|
|
mode = "repokey-blake2";
|
|
passCommand = "cat /run/keys/borgbackup_passphrase";
|
|
};
|
|
environment = { BORG_RSH = "ssh -i /run/keys/id_ed25519_my_borg_repo"; };
|
|
compression = "auto,lzma";
|
|
startAt = "hourly";
|
|
};
|
|
};
|
|
};</programlisting>
|
|
</para>
|
|
<para>The following few commands (run as root) let you test your backup.
|
|
<programlisting>
|
|
> nixos-rebuild switch
|
|
...restarting the following units: polkit.service
|
|
> systemctl restart borgbackup-job-backupToLocalServer
|
|
> sleep 10
|
|
> systemctl restart borgbackup-job-backupToLocalServer
|
|
> export BORG_PASSPHRASE=topSecrect
|
|
> borg list --rsh='ssh -i /run/keys/id_ed25519_my_borg_repo' borg@nixos:.
|
|
nixos-backupToLocalServer-2020-03-30T21:46:17 Mon, 2020-03-30 21:46:19 [84feb97710954931ca384182f5f3cb90665f35cef214760abd7350fb064786ac]
|
|
nixos-backupToLocalServer-2020-03-30T21:46:30 Mon, 2020-03-30 21:46:32 [e77321694ecd160ca2228611747c6ad1be177d6e0d894538898de7a2621b6e68]</programlisting>
|
|
</para>
|
|
</section>
|
|
|
|
<section xml:id="opt-services-backup-borgbackup-borgbase">
|
|
<title>Backup to a hosting service</title>
|
|
|
|
<para>
|
|
Several companies offer <link
|
|
xlink:href="https://www.borgbackup.org/support/commercial.html">(paid)
|
|
hosting services</link> for Borg repositories.
|
|
</para>
|
|
<para>
|
|
To backup your home directory to borgbase you have to:
|
|
</para>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>
|
|
Generate a SSH key without a password, to access the remote server. E.g.
|
|
</para>
|
|
<para>
|
|
<programlisting>sudo ssh-keygen -N '' -t ed25519 -f /run/keys/id_ed25519_borgbase</programlisting>
|
|
</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>
|
|
Create the repository on the server by following the instructions for your
|
|
hosting server.
|
|
</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>
|
|
Initialize the repository on the server. Eg.
|
|
<programlisting>
|
|
sudo borg init --encryption=repokey-blake2 \
|
|
-rsh "ssh -i /run/keys/id_ed25519_borgbase" \
|
|
zzz2aaaaa@zzz2aaaaa.repo.borgbase.com:repo</programlisting>
|
|
</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Add it to your NixOS configuration, e.g.
|
|
<programlisting>
|
|
{
|
|
services.borgbackup.jobs = {
|
|
my_Remote_Backup = {
|
|
paths = [ "/" ];
|
|
exclude = [ "/nix" "'**/.cache'" ];
|
|
repo = "zzz2aaaaa@zzz2aaaaa.repo.borgbase.com:repo";
|
|
encryption = {
|
|
mode = "repokey-blake2";
|
|
passCommand = "cat /run/keys/borgbackup_passphrase";
|
|
};
|
|
BORG_RSH = "ssh -i /run/keys/id_ed25519_borgbase";
|
|
compression = "auto,lzma";
|
|
startAt = "daily";
|
|
};
|
|
};
|
|
}}</programlisting>
|
|
</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</section>
|
|
<section xml:id="opt-services-backup-borgbackup-vorta">
|
|
<title>Vorta backup client for the desktop</title>
|
|
<para>
|
|
Vorta is a backup client for macOS and Linux desktops. It integrates the
|
|
mighty BorgBackup with your desktop environment to protect your data from
|
|
disk failure, ransomware and theft.
|
|
</para>
|
|
<para>
|
|
It is available as a flatpak package. To enable it you must set the
|
|
following two configuration items.
|
|
</para>
|
|
<para>
|
|
<programlisting>
|
|
services.flatpak.enable = true ;
|
|
# next line is needed to avoid the Error
|
|
# Error deploying: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown:
|
|
services.accounts-daemon.enable = true;
|
|
</programlisting>
|
|
</para>
|
|
<para>As a normal user you must first install, then run vorta using the
|
|
following commands:
|
|
<programlisting>
|
|
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
|
|
flatpak install flathub com.borgbase.Vorta
|
|
flatpak run --branch=stable --arch=x86_64 --command=vorta com.borgbase.Vorta
|
|
</programlisting>
|
|
After running <code>flatpak install</code> you can start Vorta also via
|
|
the KDE application menu.
|
|
</para>
|
|
<para>
|
|
Details about using Vorta can be found under <link
|
|
xlink:href="https://vorta.borgbase.com/usage">https://vorta.borgbase.com
|
|
</link>.
|
|
</para>
|
|
</section>
|
|
</chapter>
|