Initialise oslo.privsep early in main

Any process using oslo.privsep should now initialise the library before
first use with things like the rootwrap command to use.

This should be done near the top of main() in any command that expects
to make privileged calls via oslo.privsep (eg: cinder-volume, and not
cinder-api).

See I3ea73e16b07a870629e7d69e897f2524d7068ae8 for the corresponding
change in oslo.privsep.

Change-Id: Id9652ccf001a707fbd59e277c36817bd6d58e7b3
Closes-Bug: #1592043

cinder/cmd/backup.py

@@ -18,11 +18,13 @@
 """Starter script for Cinder Volume Backup."""
 
 import logging as python_logging
+import shlex
 import sys
 
 import eventlet
 from oslo_config import cfg
 from oslo_log import log as logging
+from oslo_privsep import priv_context
 from oslo_reports import guru_meditation_report as gmr
 from oslo_reports import opts as gmr_opts
 
@@ -49,6 +51,7 @@ def main():
          version=version.version_string())
     logging.setup(CONF, "cinder")
     python_logging.captureWarnings(True)
+    priv_context.init(root_helper=shlex.split(utils.get_root_helper()))
     utils.monkey_patch()
     gmr.TextGuruMeditation.setup_autorun(version, conf=CONF)
     server = service.Service.create(binary='cinder-backup')

cinder/cmd/volume.py

@@ -31,10 +31,12 @@ if os.name == 'nt':
 else:
     eventlet.monkey_patch()
 
+import shlex
 import sys
 
 from oslo_config import cfg
 from oslo_log import log as logging
+from oslo_privsep import priv_context
 from oslo_reports import guru_meditation_report as gmr
 from oslo_reports import opts as gmr_opts
 
@@ -64,6 +66,7 @@ def main():
          version=version.version_string())
     logging.setup(CONF, "cinder")
     python_logging.captureWarnings(True)
+    priv_context.init(root_helper=shlex.split(utils.get_root_helper()))
     utils.monkey_patch()
     gmr.TextGuruMeditation.setup_autorun(version, conf=CONF)
     launcher = service.get_launcher()

requirements.txt

@@ -22,6 +22,7 @@ oslo.log>=1.14.0 # Apache-2.0
 oslo.messaging>=5.2.0 # Apache-2.0
 oslo.middleware>=3.0.0 # Apache-2.0
 oslo.policy>=1.9.0 # Apache-2.0
+oslo.privsep>=1.9.0 # Apache-2.0
 oslo.reports>=0.6.0 # Apache-2.0
 oslo.rootwrap>=2.0.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0