--- /dev/null
+#!/bin/bash
+# Copyright 2017 Sandvine
+#
+# Licensed 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.
+#
+# A helper routine that cleans up old container images based
+# on an input prefix to check. Jenkins builds will add an incrementing
+# build suffix (build number) to the prefix
+#
+#$1 container prefix name
+
+keep_number=1
+prefix=$1
+
+# keep the first build
+keep=$(lxc list | grep $prefix | awk '{print $2}' | sort -rn | head -n$keep_number)
+for container in $(lxc list | grep $prefix | awk '{print $2}' | sort -rn); do
+ if [ "$container" != "$keep" ]; then
+ echo "deleting old container $container"
+ lxc delete $container --force
+ fi
+done