Move tarball compression to background service;Housekeeping

ansible/roles/firstboot/files/ansible_payload/templates/compresstarballs.j2

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# Change working directory
+popd {{ _template.service.workingdir }}
+
+# Compress *.tar files
+if tar -czf image-tarballs.tgz *.tar; then
+    # Disable systemd unit
+    systemctl disable {{ _template.service.name }}
+fi

ansible/roles/firstboot/files/ansible_payload/templates/systemdunit.j2

@@ -0,0 +1,9 @@
+[Unit]
+Description={{ _template.service.name }}
+
+[Service]
+ExecStart={{ _template.service.executable }}
+Nice=10
+
+[Install]
+WantedBy=multi-user.target