Aterfax

Netbooting the Urbackup restore ISO with Netboot.xyz

Description

The following instructions will allow you to netboot the Urbackup restoration CD/ISO using netboot.xyz and were derived from info at:

• https://forums.urbackup.org/t/restoring-image-from-pxe/205

Note

These instructions assume you are using the Netboot.xyz Docker container.

Aterfax

CRON time expression validation with regex

If you're looking for a regex expression which can validate the format of a CRON time expression (for most versions of CRON) you've probably had a look at StackOverflow and had to trapse through a bunch of possible expressions which may not quite work.

Credit to Juarez and Slava who collectively derived the expression below here: https://stackoverflow.com/questions/14203122/create-a-regular-expression-for-cron-statement/63729682#63729682

Aterfax

SWAG + Mailcow docker - syncing cert renewal actions

Motivation

Since you cannot prod Mailcow docker containers to restart from the certbot context within the SWAG docker container, we can just use some bash and systemd on the host.

Bash Script

Note that your host will need inotify-tools installed, e.g. apt install inotify-tools

/opt/mailcow-letsencrypt-watcher.sh

Aterfax

In container MariaDB / MySQL dumps for Linuxserver.io MariaDB/MySQL containers

Motivation

tl;dr you want in container DB dumps for consistent backups via an external backup method grabbing your volume or bind mount directory.

Step 1

Enable the LinuxServer.io docker mod for cron by adding the env var to your compose / run script: