--- /dev/null
+#!/usr/bin/env bash
+
+# This script is patching /usr/lib/python2.7/dist-packages/nova/network/linux_net.py
+# More specifically it's adding '1' as recognized exit code
+# it's WA and will work just when _setr_device_mtu will not change dramatically
+
+# step1) get ROW for patching
+FILE="/usr/lib/python2.7/dist-packages/nova/network/linux_net.py"
+
+ROW=`grep -n "def _set_device_mtu(dev, mtu=None):" $FILE | cut -d ":" -f 1`
+
+# step2) use sed for patching it
+
+sed -i.bck "$((ROW+8))s/check_exit_code=\[0, 2, 254\]/check_exit_code=\[0, 1, 2, 254\]/" $FILE
+
+diff $FILE $FILE.bck
+
+if [ $? -eq 0 ]; then
+ echo "WARNING: linux_net.py not patched, please check if it's really needed"
+else
+ echo "SUCCESS: linux_net.py patched"
+fi