docs: update docs

Update the docs with explanations and examples
about the exclude-list feature.

Signed-off-by: Talor Itzhak <[email protected]>

docs/reference/topology-updater-commandline-reference.md

@@ -21,7 +21,8 @@ To quickly view available command line flags execute `nfd-topology-updater -help
 In a docker container:
 
 ```bash
-docker run gcr.io/k8s-staging-nfd/node-feature-discovery:master nfd-topology-updater -help
+docker run gcr.io/k8s-staging-nfd/node-feature-discovery:master \
+nfd-topology-updater -help
 ```
 
 ### -h, -help
@@ -32,6 +33,19 @@ Print usage and exit.
 
 Print version and exit.
 
+### -config
+
+The `-config` flag specifies the path of the nfd-topology-updater
+configuration file to use.
+
+Default: /etc/kubernetes/node-feature-discovery/nfd-topology-updater.conf
+
+Example:
+
+```bash
+nfd-topology-updater -config=/opt/nfd/nfd-topology-updater.conf
+```
+
 ### -server
 
 The `-server` flag specifies the address of the nfd-master endpoint where to

docs/reference/topology-updater-configuration-reference.md

@@ -0,0 +1,38 @@
+---
+title: "Topology-Updater config reference"
+layout: default
+sort: 3
+---
+
+# Configuration file reference of nfd-topology-updater
+{: .no_toc}
+
+## Table of contents
+{: .no_toc .text-delta}
+
+1. TOC
+{:toc}
+
+---
+
+See the
+[sample configuration file](https://github.com/kubernetes-sigs/node-feature-discovery/blob/{{site.release}}/deployment/components/topology-updater-config/nfd-topology-updater.conf.example)
+for a full example configuration.
+
+## excludeList
+
+The `excludeList` specifies a key-value map of allocated resources that should not be examined by the topology-updater 
+agent per node.
+Each key is a node name with a value as a list of resources
+that should not be examined by the agent for that specific node. 
+
+### excludeList.*
+`excludeList.*` is a special value that use to specify all nodes.
+A resource that would be listed under this key, would be excluded from all nodes.
+
+Example: 
+
+```yaml
+excludeList:
+  *: [hugepages-2Mi]
+```

docs/usage/nfd-topology-updater.md

@@ -20,5 +20,9 @@ When run as a daemonset, nodes are re-examined for the allocated resources
 (to determine the information of the allocatable resources on a per zone basis
 where a zone can be a NUMA node) at an interval specified using the
 [`-sleep-interval`](../reference/topology-updater-commandline-reference.html#-sleep-interval)
-option. The default sleep interval is set to 60s which is the the value when no
+option. The default sleep interval is set to 60s which is the value when no
 -sleep-interval is specified.
+In addition, it can avoid examined specific allocated resources
+given a configuration of resources to exclude via [`-config`](../reference/topology-updater-commandline-reference.html#-config)
+
+