Merged client playbook and server playbook

roles/server_native-pull-primary-backups/files/pull-remote-backup.sh

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+#!/bin/bash
+# @param $1 hostname from which backup should be pulled
+
+echo "pulling backups from: $1"
+
+# error counter
+errors=0
+
+echo "loading meta data..."
+
+remote_host="backup@$1"
+echo "host address:         $remote_host"
+
+remote_machine_id="$( (ssh "$remote_host" sha256sum /etc/machine-id) | head -c 64 )" || exit 1
+echo "remote machine id:    $remote_machine_id"
+
+general_backup_machine_dir="/Backups/$remote_machine_id/"
+echo "backup dir:           $general_backup_machine_dir"
+
+remote_backup_types="$(ssh "$remote_host" "find $general_backup_machine_dir -maxdepth 1 -type d -execdir basename {} ;")" || exit 1
+echo "backuptypes:          $remote_backup_types"
+
+for backup_type in $remote_backup_types; do
+  if [ "$backup_type" != "$remote_machine_id" ]; then
+    general_backup_type_dir="$general_backup_machine_dir""$backup_type/"
+    # folder which contains versions
+    general_versions_dir="$general_backup_type_dir""versions/"
+    # link name of last backup
+    general_latest_version_link="$general_backup_type_dir""latest"
+    
+    # this folder contains the last backup
+    local_latest_version_dir="$general_versions_dir$(date '+%Y%m%d%H%M%S')/"
+    # this is the link name of the previous version
+    local_previous_version_link="$general_backup_type_dir""previous"
+
+    #identifiy previous version
+    local_versions=( $(basename -a "$general_versions_dir"*/ | sort) )|| exit 1
+    local_last_version="${local_versions[-1]}" || exit 1
+    local_previous_version_dir="$general_versions_dir""$local_last_version/"
+
+    # source path of the backup files:
+    remote_last_version_dir="$(ssh "$remote_host" readlink -f $general_latest_version_link)"
+    echo "last remote backup: $remote_last_version_dir"
+    remote_source_path="$remote_host:$remote_last_version_dir/"
+    echo "source path:        $remote_source_path"
+
+    # create working folders:
+    mkdir -vp "$local_latest_version_dir"
+
+    # delete links
+    rm -v "$general_latest_version_link"
+    rm -v "$local_previous_version_link"
+
+    # create links
+    ln -vs "$local_latest_version_dir" "$general_latest_version_link" || exit 1
+    ln -vs "$local_previous_version_dir" "$local_previous_version_link" || exit 1
+
+    # do backup:
+    rsync_command='rsync -abP --delete --delete-excluded --rsync-path="sudo rsync" --link-dest="'$local_previous_version_link'" "'$remote_source_path'" "'$general_latest_version_link'"'
+    echo "executing: $rsync_command"
+    eval "$rsync_command" || ((errors+=1));
+  fi
+done
+exit $errors;