Fix spelling typos

Fixes for:
* nova/*py
* nova/scheduler/
* nova/compute/*py
* nova/api/ec2/

Change-Id: I7bec89b3551eda84d596e55eeba9ccb9d944a5cb

nova/notifications.py

@@ -110,7 +110,7 @@ def send_update_with_states(context, instance, old_vm_state, new_vm_state,
     if verify_states:
         # check whether we need to send notification related to state changes
         fire_update = False
-        # do not send notification if the confitions for vm and(or) task state
+        # do not send notification if the conditions for vm and(or) task state
         # are not satisfied
         if old_vm_state != new_vm_state:
             # yes, the vm state is changing:
@@ -122,7 +122,7 @@ def send_update_with_states(context, instance, old_vm_state, new_vm_state,
                 fire_update = True
 
     if fire_update:
-        # send either a state change or a regular notificaion
+        # send either a state change or a regular notification
         try:
             _send_instance_update_notification(context, instance,
                     old_vm_state=old_vm_state, old_task_state=old_task_state,

nova/scheduler/driver.py

@@ -296,7 +296,7 @@ class Scheduler(object):
     def _live_migration_common_check(self, context, instance_ref, dest):
         """Live migration common check routine.
 
-        Below checkings are followed by
+        The following checks are based on
         http://wiki.libvirt.org/page/TodoPreMigrationChecks
 
         :param context: security context
@@ -313,7 +313,7 @@ class Scheduler(object):
         if orig_hypervisor != dest_hypervisor:
             raise exception.InvalidHypervisorType()
 
-        # Checkng hypervisor version.
+        # Checking hypervisor version.
         orig_hypervisor = oservice_ref['hypervisor_version']
         dest_hypervisor = dservice_ref['hypervisor_version']
         if orig_hypervisor > dest_hypervisor:
@@ -334,7 +334,7 @@ class Scheduler(object):
 
         # Getting total used memory and disk of host
         # It should be sum of memories that are assigned as max value,
-        # because overcommiting is risky.
+        # because overcommitting is risky.
         instance_refs = db.instance_get_all_by_host(context, dest)
         used = sum([i['memory_mb'] for i in instance_refs])
 

nova/scheduler/filter_scheduler.py

@@ -217,7 +217,7 @@ class FilterScheduler(driver.Scheduler):
             return inst
 
     def _add_retry_host(self, filter_properties, host):
-        """Add a retry entry for the selected computep host.  In the event that
+        """Add a retry entry for the selected compute host.  In the event that
         the request gets re-scheduled, this entry will signal that the given
         host has already been tried.
         """

nova/scheduler/filters/all_hosts_filter.py

@@ -18,7 +18,7 @@ from nova.scheduler import filters
 
 
 class AllHostsFilter(filters.BaseHostFilter):
-    """NOP host filter. Returns all hosts."""
+    """NOOP host filter. Returns all hosts."""
 
     def host_passes(self, host_state, filter_properties):
         return True

nova/scheduler/host_manager.py

@@ -174,7 +174,7 @@ class HostState(object):
 class HostManager(object):
     """Base HostManager class."""
 
-    # Can be overriden in a subclass
+    # Can be overridden in a subclass
     host_state_cls = HostState
 
     def __init__(self):

nova/scheduler/manager.py

@@ -128,7 +128,7 @@ class SchedulerManager(manager.Manager):
                     reservations)
             return result
         except exception.NoValidHost as ex:
-            # don't reraise
+            # don't re-raise
             self._set_vm_state_and_notify('run_instance',
                                          {'vm_state': vm_states.ERROR},
                                           context, ex, request_spec)

nova/test.py

@@ -221,7 +221,7 @@ class TestCase(unittest.TestCase):
                 error = abs(float(d1value) - float(d2value))
                 within_tolerance = error <= tolerance
             except (ValueError, TypeError):
-                # If both values aren't convertable to float, just ignore
+                # If both values aren't convertible to float, just ignore
                 # ValueError if arg is a str, TypeError if it's something else
                 # (like None)
                 within_tolerance = False

nova/utils.py

@@ -628,7 +628,7 @@ class _InterProcessLock(object):
             self.unlock()
             self.lockfile.close()
         except IOError:
-            LOG.exception(_("Could not release the aquired lock `%s`")
+            LOG.exception(_("Could not release the acquired lock `%s`")
                              % self.fname)
 
     def trylock(self):