Merge pull request #35305 from windsonsea/nodeyhf

[en] updated /tasks/administer-cluster/nodelocaldns.md

Author: k8s-ci-robot

content/en/docs/tasks/administer-cluster/nodelocaldns.md

@@ -3,7 +3,7 @@ reviewers:
 - bowei
 - zihongz
 - sftim
-title: Using NodeLocal DNSCache in Kubernetes clusters
+title: Using NodeLocal DNSCache in Kubernetes Clusters
 content_type: task
 ---
 
@@ -40,7 +40,7 @@ hostnames ("`cluster.local`" suffix by default).
   [conntrack races](https://github.com/kubernetes/kubernetes/issues/56903)
   and avoid UDP DNS entries filling up conntrack table.
 
-* Connections from local caching agent to kube-dns service can be upgraded to TCP.
+* Connections from the local caching agent to kube-dns service can be upgraded to TCP.
   TCP conntrack entries will be removed on connection close in contrast with
   UDP entries that have to timeout
   ([default](https://www.kernel.org/doc/Documentation/networking/nf_conntrack-sysctl.txt)
@@ -52,7 +52,7 @@ hostnames ("`cluster.local`" suffix by default).
 
 * Metrics & visibility into DNS requests at a node level.
 
-* Negative caching can be re-enabled, thereby reducing number of queries to kube-dns service.
+* Negative caching can be re-enabled, thereby reducing the number of queries for the kube-dns service.
 
 ## Architecture Diagram
 
@@ -66,7 +66,7 @@ This is the path followed by DNS Queries after NodeLocal DNSCache is enabled:
 {{< note >}}
 The local listen IP address for NodeLocal DNSCache can be any address that
 can be guaranteed to not collide with any existing IP in your cluster.
-It's recommended to use an address with a local scope, per example,
+It's recommended to use an address with a local scope, for example,
 from the 'link-local' range '169.254.0.0/16' for IPv4 or from the
 'Unique Local Address' range in IPv6 'fd00::/8'.
 {{< /note >}}
@@ -77,9 +77,9 @@ This feature can be enabled using the following steps:
   [`nodelocaldns.yaml`](https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/dns/nodelocaldns/nodelocaldns.yaml)
   and save it as `nodelocaldns.yaml.`
 
-* If using IPv6, the CoreDNS configuration file need to enclose all the IPv6 addresses
+* If using IPv6, the CoreDNS configuration file needs to enclose all the IPv6 addresses
   into square brackets if used in 'IP:Port' format. 
-  If you are using the sample manifest from the previous point, this will require to modify
+  If you are using the sample manifest from the previous point, this will require you to modify
   [the configuration line L70](https://github.com/kubernetes/kubernetes/blob/b2ecd1b3a3192fbbe2b9e348e095326f51dc43dd/cluster/addons/dns/nodelocaldns/nodelocaldns.yaml#L70)
   like this: "`health [__PILLAR__LOCAL__DNS__]:8080`"
 
@@ -103,7 +103,7 @@ This feature can be enabled using the following steps:
     `__PILLAR__CLUSTER__DNS__` and `__PILLAR__UPSTREAM__SERVERS__` will be populated by
     the `node-local-dns` pods.
     In this mode, the `node-local-dns` pods listen on both the kube-dns service IP
-    as well as `<node-local-address>`, so pods can lookup DNS records using either IP address.
+    as well as `<node-local-address>`, so pods can look up DNS records using either IP address.
 
   * If kube-proxy is running in IPVS mode: