Added disc-space-checker

roles/native-disc-space-check/templates/disc-space-check.service.j2

@@ -0,0 +1,7 @@
+[Unit]
+Description=checking disc space
+OnFailure=systemd-email@%n.service
+
+[Service]
+Type=oneshot
+ExecStart=/bin/bash {{disc_space_check_folder}}disc-space-check.sh

roles/native-disc-space-check/templates/disc-space-check.sh.j2

@@ -0,0 +1,13 @@
+#!/bin/sh
+errors=0
+echo "checking disc space use..."
+df
+for disc_use_percent in $(df --output=pcent | sed 1d)
+do
+    disc_use_percent_number=$(echo "$disc_use_percent" | sed "s/%//")
+    if [ "$disc_use_percent_number" -gt "{{size_percent_disc_space_warning}}" ]; then
+      echo "WARNING: $disc_use_percent_number exceeds the limit of {{size_percent_disc_space_warning}}%."
+      errors+=1;
+    fi
+done
+exit $errors;

roles/native-disc-space-check/templates/disc-space-check.timer.j2

@@ -0,0 +1,8 @@
+[Unit]
+Description=starts disc-space-check.service
+
+[Timer]
+OnCalendar={{on_calendar_disc_space_check}}
+
+[Install]
+WantedBy=timers.target