Free ISOs from GitHub Actions Instance.sh

#!/bin/bash
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


#
# The Azure provided machines typically have the following disk allocation:
# Total space: 85GB
# Allocated: 67 GB
# Free: 17 GB
# This script frees up 28 GB of disk space by deleting unneeded packages and 
# large directories.
# The Flink end to end tests download and generate more than 17 GB of files,
# causing unpredictable behavior and build failures.
#

echo "=============================================================================="
echo "Preparing Requisites"
echo "=============================================================================="

sudo apt install --reinstall secure-delete -yfmqqqqq --autoremove --purge

echo "=============================================================================="
echo "Freeing ISOs occupied on CI system"
echo "=============================================================================="
srm -f Win*.iso Microsoft*.iso