fluentd-elasticsearch add-on: Improve README

cluster/addons/fluentd-elasticsearch/README.md

@@ -8,7 +8,7 @@ is a graphical interface for viewing and querying the logs stored in
 Elasticsearch.
 
 **Note:** this addon should **not** be used as-is in production. This is
-an example and you should treat is as such. Please see at least the
+an example and you should treat it as such. Please see at least the
 [Security](#security) and the [Storage](#storage) sections for more
 information.
 
@@ -19,9 +19,9 @@ a Deployment, but allows for maintaining state on storage volumes.
 
 ### Security
 
-Elasticsearch has capabilities to enable authorization using
+Elasticsearch has capabilities to enable authorization using the
 [X-Pack plugin][xPack]. See configuration parameter `xpack.security.enabled`
-in Elasticsearch and Kibana configurations. It can also be set via
+in Elasticsearch and Kibana configurations. It can also be set via the
 `XPACK_SECURITY_ENABLED` env variable. After enabling the feature,
 follow [official documentation][setupCreds] to set up credentials in
 Elasticsearch and Kibana. Don't forget to propagate those credentials also to
@@ -31,7 +31,7 @@ and [Secrets][secret] to store credentials in the Kubernetes apiserver.
 
 ### Initialization
 
-The Elasticsearch Statefulset manifest specifies that there shall be an
+The Elasticsearch StatefulSet manifest specifies that there shall be an
 [init container][initContainer] executing before Elasticsearch containers
 themselves, in order to ensure that the kernel state variable
 `vm.max_map_count` is at least 262144, since this is a requirement of
@@ -61,7 +61,7 @@ Learn more in the [official Kubernetes documentation][k8sElasticsearchDocs].
 
 Since Fluentd talks to the Elasticsearch service inside the cluster, instances
 on masters won't work, because masters have no kube-proxy. Don't mark masters
-with a label mentioned in the previous paragraph or add a taint on them to
+with the label mentioned in the previous paragraph or add a taint on them to
 avoid Fluentd pods scheduling there.
 
 [fluentd]: http://www.fluentd.org/