Finished backup-to-swappable draft

roles/independent_backup-to-swappable/README.md

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+# independent_auto-usb-backup
+This tool role allows to make an automatic backup to a swappable device.
+
+## More information
+- https://unix.stackexchange.com/questions/67464/how-to-get-uuid-for-a-usb-drive
+- https://unix.stackexchange.com/questions/65891/how-to-execute-a-shellscript-when-i-plug-in-a-usb-device
+- https://askubuntu.com/questions/25071/how-to-run-a-script-when-a-specific-flash-drive-is-mounted
+- https://wiki.archlinux.org/title/udev

roles/independent_backup-to-swappable/files/backup-to-swappable.sh

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+#! /bin/sh
+backup_to_swappable_destination_path="$1" &&
+echo "backup to swappable destination path: $backup_to_swappable_destination_path" &&
+
+source_path="$2" &&
+echo "source path: $source_path" || exit 1
+
+if [ ! -d "$backup_to_swappable_destination_path" ]; then
+    echo "Directory $backup_to_swappable_destination_path does not exist" &&
+    exit 1
+fi
+
+machine_id="$(sha256sum /etc/machine-id | head -c 64 )" &&
+echo "machine id: $machine_id" &&
+
+versions_path="$backup_to_swappable_destination_path$machine_id/backup-to-swappable/" &&
+echo "versions path: $versions_path" || exit 1
+
+if [ ! -d "$versions_path" ]; then
+    echo "Creating $versions_path..." &&
+    mkdir -vp $versions_path || exit 1
+fi 
+
+previous_version_path="$(ls -d $versions_path* | tail -1)" &&
+echo "previous versions path: $previous_version_path" &&
+
+current_version_path="$versions_path$(date '+%Y%m%d%H%M%S')" &&
+echo "current versions path: $current_version_path" &&
+
+echo "creating backup destination folder..." &&
+mkdir -vp "$current_version_path" &&
+
+echo "Starting syncronization..."
+rsync -abP --delete --delete-excluded --link-dest="$previous_version_path" "$source_path" "$current_version_path" &&
+echo "Syncronization finished." || exit 1

roles/independent_backup-to-swappable/handlers/main.yml

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+- name: "reload backup-to-swappable.service"
+  systemd:
+    name: backup-to-swappable.service
+    state: reloaded
+    enabled: yes
+    daemon_reload: yes
+- name: "restart backup-to-swappable.timer"
+  systemd:
+    name: backup-to-swappable.timer
+    state: restarted
+    enabled: yes
+    daemon_reload: yes

roles/independent_backup-to-swappable/meta/main.yml

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+dependencies:
+- independent_user-administrator
+- independent_systemd-email

roles/independent_backup-to-swappable/tasks/main.yml

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+- name: "create {{backup_to_swappable_folder}}"
+  file:
+    path: "{{backup_to_swappable_folder}}"
+    state: directory
+    mode: 0755
+
+- name: create backup-to-swappable.rule
+  template:
+    src: backup-to-swappable.rule.j2
+    dest: "/etc/udev/rules.d/backup-to-swappable.rule"
+
+- name: create backup-to-swappable.sh
+  copy:
+    src: backup-to-swappable.sh
+    dest: "{{backup_to_swappable_folder}}backup-to-swappable.sh"
+
+- name: create backup-to-swappable.service
+  template: 
+    src: backup-to-swappable.service.j2
+    dest: /etc/systemd/system/backup-to-swappable.service
+  notify: reload backup-to-swappable.service
+
+- name: create backup-to-swappable.timer
+  template:
+    src: backup-to-swappable.timer.j2
+    dest: /etc/systemd/system/backup-to-swappable.timer
+  notify: restart backup-to-swappable.timer

roles/independent_backup-to-swappable/templates/backup-to-swappable.rule.j2

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+ACTION=="add", KERNEL=="sd[a-z]", ENV{ID_SERIAL_SHORT}=="{{backup_to_swappable_serial_short}}", RUN+="systemctl start backup-to-swappable.service"

roles/independent_backup-to-swappable/templates/backup-to-swappable.service.j2

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+[Unit]
+Description=backing up data
+OnFailure=systemd-email@%n.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/bash {{backup_to_swappable_script_path}}

roles/independent_backup-to-swappable/templates/backup-to-swappable.timer.j2

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+[Unit]
+Description=starts backup-to-swappable.service
+
+[Timer]
+OnCalendar={{on_calendar_backup_to_swappable}}
+RandomizedDelaySec={{randomized_delay_sec}}
+Persistent=true
+
+[Install]
+WantedBy=timers.target

roles/independent_backup-to-swappable/vars/main.yml

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+backup_to_swappable_folder:           "{{path_administrator_scripts}}backup-to-swappable/"
+backup_to_swappable_destination_path: "{{backup_to_swappable_destination_path}}backup-to-swappable/"
+backup_to_swappable_script_path:      "{{backup_to_swappable_folder}}backup-to-swappable.sh"