Pass list of config_files to git.upstart template

hooks/charmhelpers/contrib/openstack/templates/git.upstart

@@ -9,5 +9,7 @@ respawn
 exec start-stop-daemon --start --chuid {{ user_name }} \
             --chdir {{ start_dir }} --name {{ process_name }} \
             --exec {{ executable_name }} -- \
+            {% for config_file in config_files -%}
             --config-file={{ config_file }} \
+            {% endfor -%}
             --log-file={{ log_file }}

hooks/charmhelpers/core/hookenv.py

@@ -20,11 +20,13 @@
 # Authors:
 #  Charm Helpers Developers <juju@lists.ubuntu.com>
 
+from __future__ import print_function
 import os
 import json
 import yaml
 import subprocess
 import sys
+import errno
 from subprocess import CalledProcessError
 
 import six
@@ -87,7 +89,18 @@ def log(message, level=None):
     if not isinstance(message, six.string_types):
         message = repr(message)
     command += [message]
+    # Missing juju-log should not cause failures in unit tests
+    # Send log output to stderr
+    try:
         subprocess.call(command)
+    except OSError as e:
+        if e.errno == errno.ENOENT:
+            if level:
+                message = "{}: {}".format(level, message)
+            message = "juju-log: {}".format(message)
+            print(message, file=sys.stderr)
+        else:
+            raise
 
 
 class Serializable(UserDict):

hooks/cinder_utils.py

@@ -622,7 +622,7 @@ def git_post_install(projects_yaml):
         'start_dir': '/var/lib/cinder',
         'process_name': 'cinder-api',
         'executable_name': '/usr/local/bin/cinder-api',
-        'config_file': '/etc/cinder/cinder.conf',
+        'config_files': ['/etc/cinder/cinder.conf'],
         'log_file': '/var/log/cinder/cinder-api.log',
     }
 
@@ -633,7 +633,7 @@ def git_post_install(projects_yaml):
         'start_dir': '/var/lib/cinder',
         'process_name': 'cinder-backup',
         'executable_name': '/usr/local/bin/cinder-backup',
-        'config_file': '/etc/cinder/cinder.conf',
+        'config_files': ['/etc/cinder/cinder.conf'],
         'log_file': '/var/log/cinder/cinder-backup.log',
     }
 
@@ -644,7 +644,7 @@ def git_post_install(projects_yaml):
         'start_dir': '/var/lib/cinder',
         'process_name': 'cinder-scheduler',
         'executable_name': '/usr/local/bin/cinder-scheduler',
-        'config_file': '/etc/cinder/cinder.conf',
+        'config_files': ['/etc/cinder/cinder.conf'],
         'log_file': '/var/log/cinder/cinder-scheduler.log',
     }
 
@@ -655,7 +655,7 @@ def git_post_install(projects_yaml):
         'start_dir': '/var/lib/cinder',
         'process_name': 'cinder-volume',
         'executable_name': '/usr/local/bin/cinder-volume',
-        'config_file': '/etc/cinder/cinder.conf',
+        'config_files': ['/etc/cinder/cinder.conf'],
         'log_file': '/var/log/cinder/cinder-volume.log',
     }