From 658588adc3e824750c90f364657fcdb06068abb5 Mon Sep 17 00:00:00 2001
From: Eric Harney <eharney@redhat.com>
Date: Wed, 29 Mar 2017 11:36:41 -0400
Subject: [PATCH] Backup: Add choices to compression algorithm option

This allows detection of invalid configuration at
startup time rather than during operation.

Change-Id: I3f471d1b3d73027c5bb2d041e2893a780c38692b
---
 cinder/backup/chunkeddriver.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cinder/backup/chunkeddriver.py b/cinder/backup/chunkeddriver.py
index 5dc64a30aea..c6692f36960 100644
--- a/cinder/backup/chunkeddriver.py
+++ b/cinder/backup/chunkeddriver.py
@@ -46,6 +46,9 @@ LOG = logging.getLogger(__name__)
 chunkedbackup_service_opts = [
     cfg.StrOpt('backup_compression_algorithm',
                default='zlib',
+               choices=['none', 'off', 'no',
+                        'zlib', 'gzip',
+                        'bz2', 'bzip2'],
                help='Compression algorithm (None to disable)'),
 ]