diff --git a/ceilometer/alarm/storage/impl_mongodb.py b/ceilometer/alarm/storage/impl_mongodb.py
index 60c0ca4f0..831c29c05 100644
--- a/ceilometer/alarm/storage/impl_mongodb.py
+++ b/ceilometer/alarm/storage/impl_mongodb.py
@@ -43,7 +43,7 @@ class Connection(pymongo_base.Connection):
 
         # NOTE(jd) Use our own connection pooling on top of the Pymongo one.
         # We need that otherwise we overflow the MongoDB instance with new
-        # connection since we instanciate a Pymongo client each time someone
+        # connection since we instantiate a Pymongo client each time someone
         # requires a new storage connection.
         self.conn = self.CONNECTION_POOL.connect(url)
 
@@ -58,7 +58,7 @@ class Connection(pymongo_base.Connection):
                                  connection_options['password'])
 
         # NOTE(jd) Upgrading is just about creating index, so let's do this
-        # on connection to be sure at least the TTL is correcly updated if
+        # on connection to be sure at least the TTL is correctly updated if
         # needed.
         self.upgrade()
 
diff --git a/ceilometer/event/storage/impl_mongodb.py b/ceilometer/event/storage/impl_mongodb.py
index 20e7a066e..d5164b7be 100644
--- a/ceilometer/event/storage/impl_mongodb.py
+++ b/ceilometer/event/storage/impl_mongodb.py
@@ -27,7 +27,7 @@ class Connection(pymongo_base.Connection):
 
         # NOTE(jd) Use our own connection pooling on top of the Pymongo one.
         # We need that otherwise we overflow the MongoDB instance with new
-        # connection since we instanciate a Pymongo client each time someone
+        # connection since we instantiate a Pymongo client each time someone
         # requires a new storage connection.
         self.conn = self.CONNECTION_POOL.connect(url)
 
@@ -42,7 +42,7 @@ class Connection(pymongo_base.Connection):
                                  connection_options['password'])
 
         # NOTE(jd) Upgrading is just about creating index, so let's do this
-        # on connection to be sure at least the TTL is correcly updated if
+        # on connection to be sure at least the TTL is correctly updated if
         # needed.
         self.upgrade()
 
diff --git a/ceilometer/hardware/discovery.py b/ceilometer/hardware/discovery.py
index a57ff0c17..9231d008b 100644
--- a/ceilometer/hardware/discovery.py
+++ b/ceilometer/hardware/discovery.py
@@ -70,7 +70,7 @@ class NodesDiscoveryTripleO(plugin.DiscoveryBase):
 
                 resources.append(resource)
             except KeyError:
-                LOG.error(_("Couldn't obtain IP address of"
+                LOG.error(_("Couldn't obtain IP address of "
                             "instance %s") % instance.id)
 
         return resources
diff --git a/ceilometer/storage/impl_mongodb.py b/ceilometer/storage/impl_mongodb.py
index 490eb52a1..dde0dbd1c 100644
--- a/ceilometer/storage/impl_mongodb.py
+++ b/ceilometer/storage/impl_mongodb.py
@@ -390,7 +390,7 @@ class Connection(pymongo_base.Connection):
 
         # NOTE(jd) Use our own connection pooling on top of the Pymongo one.
         # We need that otherwise we overflow the MongoDB instance with new
-        # connection since we instanciate a Pymongo client each time someone
+        # connection since we instantiate a Pymongo client each time someone
         # requires a new storage connection.
         self.conn = self.CONNECTION_POOL.connect(url)
 
@@ -405,7 +405,7 @@ class Connection(pymongo_base.Connection):
                                  connection_options['password'])
 
         # NOTE(jd) Upgrading is just about creating index, so let's do this
-        # on connection to be sure at least the TTL is correcly updated if
+        # on connection to be sure at least the TTL is correctly updated if
         # needed.
         self.upgrade()