implemented new remote backup solution

roles/native-pull-remote-backups/Readme.md

@@ -1,6 +1,15 @@
 # role native-pull-remote-backups
 
+## goal
+This script allows to pull backups from a remote server.
+
+## scheme
+It is part of the following scheme:
+![backup scheme](https://www.veen.world/wp-content/uploads/2020/12/server-backup-768x567.jpg) <br />
+Further information you will find [in this blog post](https://www.veen.world/2020/12/26/how-i-backup-dedicated-root-servers/).
+
 ## debug
+
 ### live
 To track what the service is doing execute the following command:
 

roles/native-pull-remote-backups/files/pull-remote-backup.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+# @param $1 hostname from which backup should be pulled
+source_host="backup@$1"
+source_machine_id="$( (ssh "$source_host" sha256sum /etc/machine-id) | head -c 64)"
+source_path="/Backups/$source_machine_id/"
+directories="$(ssh "$source_host" find "$source_path" -maxdepth 1 -type d)"
+for folder in $directories; do
+  if [ "$folder" != "$source_path" ]; then
+    diff_path="$folder/diffs/$(date '+%Y%m%d%H%M%S')/"
+    latest_path="$folder/latest/"
+    remote_source_path="$source_host:$latest_path"
+    log_path="$folder/log.txt"
+    mkdir -vp "$latest_path"
+    mkdir -vp "$diff_path"
+    rsync -abvv --delete --delete-excluded --rsync-path="sudo rsync" --log-file="$log_path" --backup-dir="$diff_path" "$remote_source_path" "$latest_path" || exit 1
+  fi
+done

roles/native-pull-remote-backups/tasks/main.yml

@@ -1,16 +1,15 @@
-- name: pull-remote-backups git
-  git:
-    repo: "https://github.com/kevinveenbirkenbach/pull-remote-backup.git"
-    dest: "/usr/local/bin/pull-remote-backup"
-    update: yes
+- name: create pull-remote-backup.sh
+  copy:
+    src: pull-remote-backup.sh
+    dest: "/usr/local/bin/pull-remote-backup.sh"
 
-- name: configure pull-remote-backups.service.tpl
+- name: create pull-remote-backups.service
   template: src=pull-remote-backups.service dest=/etc/systemd/system/pull-remote-backups.service
   notify: restart pull-remote-backups service
 
-- name: configure pull-remote-backups.timer.tpl
+- name: create pull-remote-backups.timer
   template: src=pull-remote-backups.timer dest=/etc/systemd/system/pull-remote-backups.timer
   notify: restart pull-remote-backups timer
 
-- name: configure pull-remote-backups.sh
-  template: src=pull-remote-backups.sh dest=/usr/local/bin/pull-remote-backup/pull-remote-backups.sh
+- name: create pull-remote-backups.sh
+  template: src=pull-remote-backups.sh dest=/usr/local/bin/pull-remote-backups.sh

roles/native-pull-remote-backups/templates/pull-remote-backups.sh

@@ -1,7 +1,8 @@
 #!/bin/bash
+# Pulls the remote backups from multiple hosts
 hosts="{{pull_remote_backups_hosts}}";
 errors=0
 for host in $hosts; do
-        bash /usr/local/bin/pull-remote-backup/pull-remote-backup.sh $host || ((errors+=1));
+        bash /usr/local/bin/pull-remote-backup.sh $host || ((errors+=1));
 done;
 exit $errors;