Enable --debug for debug logging

oslo_log wasn't getting the correct config values passed in, so adding
'--debug' to the command line wouldn't enable debug logging.

Added docs about --debug and --standalone (the only two flags I've
seen used/supported).

Change-Id: Ie1ba64992444a65a40f2d65933942153b93e70c1

doc/source/index.rst

@@ -114,6 +114,23 @@ This is a generic tool that can be used to combine any initrd and kernel into
 a suitable ISO for booting, and so should work against any IPA ramdisk created
 -- both DIB and CoreOS.
 
+IPA Flags
+=========
+
+You can pass a variety of flags to IPA on start up to change its behavior.
+If you're using the CoreOS image, you can modify the
+ironic-python-agent.service unit in cloud-config.yaml [5]_.
+
+* --standalone: This disables the initial lookup and heartbeats to Ironic.
+  Lookup sends some information to Ironic in order to determine Ironic's node
+  UUID for the node. Heartbeat sends a periodic pings to Ironic to tell Ironic
+  the node is still running. These heartbeats also trigger parts of the deploy
+  and cleaning cycles. This flag is useful for debugging IPA without an Ironic
+  installation.
+
+* --debug: Enables debug logging.
+
+
 Hardware Managers
 =================
 
@@ -260,6 +277,7 @@ References
 .. [2] CoreOS Cloud Init - https://coreos.com/docs/cluster-management/setup/cloudinit-cloud-config/
 .. [3] DIB Element for IPA - https://github.com/openstack/diskimage-builder/tree/master/elements/ironic-agent
 .. [4] Ironic Cleaning - http://docs.openstack.org/developer/ironic/deploy/cleaning.html
+.. [5] cloud-config.yaml - https://github.com/openstack/ironic-python-agent/blob/master/imagebuild/coreos/oem/cloud-config.yml
 
 Indices and tables
 ==================

ironic_python_agent/cmd/agent.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import sys
+
 from oslo_config import cfg
 from oslo_log import log
 
@@ -104,8 +106,8 @@ CONF.register_cli_opts(cli_opts)
 
 def run():
     log.register_options(CONF)
+    CONF(args=sys.argv[1:])
     log.setup(CONF, 'ironic-python-agent')
-    CONF()
     agent.IronicPythonAgent(CONF.api_url,
                             (CONF.advertise_host, CONF.advertise_port),
                             (CONF.listen_host, CONF.listen_port),