Feat: Create new task for automatic backup on dd

files/dd_borg/40-backup.rules

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+ACTION=="add", SUBSYSTEM=="bdi", DEVPATH=="/devices/virtual/bdi/*",
+TAG+="systemd", ENV{SYSTEMD_WANTS}="automatic-backup.service"
+

files/dd_borg/automatic-backup.service

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+[Service]
+Type=oneshot
+ExecStart=/etc/backups/run.sh
+

files/dd_borg/run.sh

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+#!/bin/bash -ue
+
+# The udev rule is not terribly accurate and may trigger our service before
+# the kernel has finished probing partitions. Sleep for a bit to ensure
+# the kernel is done.
+#
+# This can be avoided by using a more precise udev rule, e.g. matching
+# a specific hardware path and partition.
+sleep 5
+
+#
+# Script configuration
+#
+
+# The backup partition is mounted there
+MOUNTPOINT=/mnt/backup
+
+# This is the location of the Borg repository
+TARGET=$MOUNTPOINT/Combava
+
+# Archive name schema
+DATE=$(date --iso-8601)-$(hostname)
+
+# This is the file that will later contain UUIDs of registered backup drives
+DISKS=/etc/backups/backup.disks
+
+# Find whether the connected block device is a backup drive
+for uuid in $(lsblk --noheadings --list --output uuid)
+do
+    if grep --quiet --fixed-strings $uuid $DISKS; then
+        break
+    fi
+    uuid=
+done
+
+if [ ! $uuid ]; then
+    echo "No backup disk found, exiting"
+    exit 0
+fi
+
+echo "Disk $uuid is a backup disk"
+partition_path=/dev/disk/by-uuid/$uuid
+# Mount file system if not already done. This assumes that if something is already
+# mounted at $MOUNTPOINT, it is the backup drive. It won't find the drive if
+# it was mounted somewhere else.
+(mount | grep $MOUNTPOINT) || mount $partition_path $MOUNTPOINT
+drive=$(lsblk --inverse --noheadings --list --paths --output name $partition_path | head --lines 1)
+echo "Drive path: $drive"
+
+#
+# Create backups
+#
+
+# Options for borg create
+BORG_OPTS="--stats --one-file-system --compression lz4 --checkpoint-interval 86400"
+
+# Set BORG_PASSPHRASE or BORG_PASSCOMMAND somewhere around here, using export,
+# if encryption is used.
+
+# No one can answer if Borg asks these questions, it is better to just fail quickly
+# instead of hanging.
+export BORG_RELOCATED_REPO_ACCESS_IS_OK=no
+export BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK=no
+
+# Log Borg version
+borg --version
+
+echo "Starting backup for $DATE"
+
+# This is just an example, change it however you see fit
+borg create $BORG_OPTS \
+    --exclude /media/documents/games/ \
+    --exclude /media/documents/musique/ \
+    --exclude /media/documents/photos/ \
+    $TARGET::$DATE-$$-documents \
+    /media/documents/
+
+# /home is often a separate partition / file system.
+# Even if it isn't (add --exclude /home above), it probably makes sense
+# to have /home in a separate archive.
+borg create $BORG_OPTS \
+    --exclude 'sh:/home/*/.cache' \
+    $TARGET::$DATE-$$-home \
+    /home/
+
+echo "Completed backup for $DATE"
+
+# Just to be completely paranoid
+sync
+
+if [ -f /etc/backups/autoeject ]; then
+    umount $MOUNTPOINT
+    hdparm -Y $drive
+fi
+
+if [ -f /etc/backups/backup-suspend ]; then
+    systemctl suspend
+fi
+

tasks/dd_backup.yml

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+---
+- name: Install autofs
+  pacman:
+    name: borg
+    state: present
+
+- name: copy udev rule in /etc/backups
+  copy:
+    src: files/dd_borg/40-backup.rules
+    dest: /etc/backups/40-backup.rules
+    backup: yes
+
+- name: Link it to /etc/udev
+  file:
+    src: /etc/backups/40-backup.rules
+    dest: /etc/udev/rules.d/40-backup.rules
+    state: link
+
+- name: copy service in /etc/backups
+  copy:
+    src: files/dd_borg/automatic-backup.service
+    dest: /etc/backups/automatic-backup.service
+    backup: yes
+
+- name: Link it to /etc/udev
+  file:
+    src: /etc/backups/automatic-backup.service
+    dest: /etc/udev/rules.d/automatic-backup.service
+    state: link
+
+- name: copy run scritp
+  template:
+    src: files/dd_borg/run.sh
+    dest: /etc/backups/run.sh
+
+- name: Reload systemctl
+  systemd:
+    daemon_reload: yes
+
+- name: Reload udev
+  shell: udevadm control --reload