Introduce cleanup-after-build.sh to clean all docker volumes generated during rpm building

Author: ingvagabund

hack/cleanup-after-build.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# This script cleans up resources allocated during image building
+
+source "$(dirname "${BASH_SOURCE}")/lib/init.sh"
+
+# delete all docker volumes used to build images to free space
+os::cleanup::buildvolumes

hack/lib/build/environment.sh

@@ -230,8 +230,10 @@ function os::build::environment::run() {
   local volume
   local tmp_volume
 
-  volume="$( os::build::environment::volume_name "origin-build" "${commit}" "${OS_BUILD_ENV_REUSE_VOLUME:-}" )"
-  tmp_volume="$( os::build::environment::volume_name "origin-build-tmp" "${commit}" "${OS_BUILD_ENV_REUSE_TMP_VOLUME:-}" )"
+  export OS_BUILD_ENV_VOLUME_PREFIX="origin-build"
+
+  volume="$( os::build::environment::volume_name "${OS_BUILD_ENV_VOLUME_PREFIX}" "${commit}" "${OS_BUILD_ENV_REUSE_VOLUME:-}" )"
+  tmp_volume="$( os::build::environment::volume_name "${OS_BUILD_ENV_VOLUME_PREFIX}-tmp" "${commit}" "${OS_BUILD_ENV_REUSE_TMP_VOLUME:-}" )"
 
   export OS_BUILD_ENV_VOLUME="${volume}"
   export OS_BUILD_ENV_TMP_VOLUME="${tmp_volume}"

hack/lib/cleanup.sh

@@ -339,3 +339,44 @@ function os::cleanup::processes() {
 	done
 }
 readonly -f os::cleanup::processes
+
+# os::cleanup::docker::volumes clens all docker volumes with a given prefix.
+#
+# Globals:
+#  None
+# Arguments:
+#  - 1: docker volume prefix
+# Returns:
+#  None
+function os::cleanup::docker::volumes() {
+	local prefix=${1}
+	local volumes="$(docker volume ls -q | grep ${prefix})"
+	echo $volumes
+	if [[ "${volumes}" != "" ]]; then
+		docker volume rm ${volumes}
+	fi
+}
+readonly -f os::cleanup::docker::volumes
+
+# os::cleanup::buildvolumes clens all volumes with origin-build prefix
+#
+# Globals:
+#  None
+# Arguments:
+#  None
+# Returns:
+#  None
+function os::cleanup::buildvolumes() {
+	local result=1
+	if os::util::find::system_binary 'imagebuilder' >/dev/null; then
+		os::log::warning "volumes cleaning not implemented for imagebuilder"
+		result=0
+	else
+		os::log::warning "Unable to locate 'imagebuilder' on PATH, falling back to Docker"
+		if os::cleanup::docker::volumes "origin-build"; then
+			result=0
+		fi
+	fi
+
+	return "${result}"
+}