Risk of Regression: This patch don’t modify existing functionlities, but I have added some.

1. nova.db.service.sqlalchemy.model.Serivce (adding a column to database)
    2. nova.service ( nova-compute needes to insert information defined by 1 above)

So, db migration is necessary for existing user, but just adding columns.

.mailmap

@@ -16,6 +16,8 @@
 <jmckenty@gmail.com> <jmckenty@joshua-mckentys-macbook-pro.local>
 <jmckenty@gmail.com> <joshua.mckenty@nasa.gov>
 <justin@fathomdb.com> <justinsb@justinsb-desktop>
+<masumotok@nttdata.co.jp> <root@openstack2-api>
+<masumotok@nttdata.co.jp> Masumoto<masumotok@nttdata.co.jp>
 <mordred@inaugust.com> <mordred@hudson>
 <paul@openstack.org> <pvoccio@castor.local>
 <paul@openstack.org> <paul.voccio@rackspace.com>

Authors

@@ -26,6 +26,7 @@ Josh Durgin <joshd@hq.newdream.net>
 Josh Kearney <josh.kearney@rackspace.com>
 Joshua McKenty <jmckenty@gmail.com>
 Justin Santa Barbara <justin@fathomdb.com>
+Kei Masumoto <masumotok@nttdata.co.jp>
 Ken Pepple <ken.pepple@gmail.com>
 Koji Iida <iida.koji@lab.ntt.co.jp>
 Lorin Hochstein <lorin@isi.edu>
@@ -34,6 +35,7 @@ Michael Gundlach <michael.gundlach@rackspace.com>
 Monsyne Dragon <mdragon@rackspace.com>
 Monty Taylor <mordred@inaugust.com>
 MORITA Kazutaka <morita.kazutaka@gmail.com>
+Muneyuki Noguchi <noguchimn@nttdata.co.jp>
 Nachi Ueno <ueno.nachi@lab.ntt.co.jp> <openstack@lab.ntt.co.jp> <nati.ueno@gmail.com> <nova@u4>
 Paul Voccio <paul@openstack.org>
 Rick Clark <rick@openstack.org>

bin/nova-manage

@@ -62,6 +62,7 @@ import time
 
 import IPy
 
+
 # If ../nova/__init__.py exists, add ../ to Python search path, so that
 # it will override what happens to be installed in /usr/(local/)lib/python...
 possible_topdir = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
@@ -81,8 +82,9 @@ from nova import log as logging
 from nova import quota
 from nova import utils
 from nova.auth import manager
+from nova import rpc
 from nova.cloudpipe import pipelib
-
+from nova.api.ec2 import cloud
 
 logging.basicConfig()
 FLAGS = flags.FLAGS
@@ -465,6 +467,82 @@ class NetworkCommands(object):
                                     int(vpn_start), fixed_range_v6)
 
 
+class InstanceCommands(object):
+    """Class for mangaging VM instances."""
+
+    def live_migration(self, ec2_id, dest):
+        """live_migration"""
+
+        ctxt = context.get_admin_context()
+        instance_id = cloud.ec2_id_to_id(ec2_id)
+
+        if FLAGS.connection_type != 'libvirt':
+            msg = _('Only KVM is supported for now. Sorry!')
+            raise exception.Error(msg)
+
+        if FLAGS.volume_driver != 'nova.volume.driver.AOEDriver':
+            instance_ref = db.instance_get(ctxt, instance_id)
+            if len(instance_ref['volumes']) != 0:
+                msg = _(("""Volumes attached by ISCSIDriver"""
+                         """ are not supported. Sorry!"""))
+                raise  exception.Error(msg)
+
+        rpc.call(ctxt,
+                 FLAGS.scheduler_topic,
+                 {"method": "live_migration",
+                  "args": {"instance_id": instance_id,
+                           "dest": dest,
+                           "topic": FLAGS.compute_topic}})
+
+        msg = 'Migration of %s initiated. ' % ec2_id
+        msg += 'Check its progress using euca-describe-instances.'
+        print msg
+
+
+class HostCommands(object):
+    """Class for mangaging host(physical nodes)."""
+
+    def list(self):
+        """describe host list."""
+
+        # To supress msg: No handlers could be found for logger "amqplib"
+        logging.basicConfig()
+
+        service_refs = db.service_get_all(context.get_admin_context())
+        hosts = [h['host'] for h in service_refs]
+        hosts = list(set(hosts))
+        for host in hosts:
+            print host
+
+    def show(self, host):
+        """describe cpu/memory/hdd info for host."""
+
+        result = rpc.call(context.get_admin_context(),
+                     FLAGS.scheduler_topic,
+                     {"method": "show_host_resource",
+                      "args": {"host": host}})
+
+        # Checking result msg format is necessary, that will have done
+        # when this feture is included in API.
+        if type(result) != dict:
+            print 'Unexpected error occurs'
+        elif not result['ret']:
+            print '%s' % result['msg']
+        else:
+            cpu = result['phy_resource']['vcpus']
+            mem = result['phy_resource']['memory_mb']
+            hdd = result['phy_resource']['local_gb']
+
+            print 'HOST\t\tPROJECT\t\tcpu\tmem(mb)\tdisk(gb)'
+            print '%s\t\t\t%s\t%s\t%s' % (host, cpu, mem, hdd)
+            for p_id, val in result['usage'].items():
+                print '%s\t%s\t\t%s\t%s\t%s' % (host,
+                                             p_id,
+                                             val['vcpus'],
+                                             val['memory_mb'],
+                                             val['local_gb'])
+
+
 class ServiceCommands(object):
     """Enable and disable running services"""
 
@@ -527,6 +605,8 @@ CATEGORIES = [
     ('vpn', VpnCommands),
     ('floating', FloatingIpCommands),
     ('network', NetworkCommands),
+    ('instance', InstanceCommands),
+    ('host', HostCommands),
     ('service', ServiceCommands),
     ('log', LogCommands)]