add content for hdfs repository type and revise existing content wher…

_api-reference/snapshots/create-repository.md

@@ -9,14 +9,17 @@
 **Introduced 1.0**
 {: .label .label-purple }
 
+
 You can register a new repository in which to store snapshots or update information for an existing repository by using the snapshots API.
 
-There are two types of snapshot repositories:
+Snapshot repositories can be of the following types:
 
 * File system (`fs`): For instructions on creating an `fs` repository, see [Register repository shared file system]({{site.url}}{{site.baseurl}}/tuning-your-cluster/availability-and-recovery/snapshots/snapshot-restore/#shared-file-system).
 
 * Amazon Simple Storage Service (Amazon S3) bucket (`s3`): For instructions on creating an `s3` repository, see [Register repository Amazon S3]({{site.url}}{{site.baseurl}}/tuning-your-cluster/availability-and-recovery/snapshots/snapshot-restore/#amazon-s3).
 
+* Hadoop Distributed File System (HDFS) (`hdfs`): For instructions on creating an `hdfs` repository, see [Register an HDFS repository]({{site.url}}{{site.baseurl}}/tuning-your-cluster/availability-and-recovery/snapshots/snapshot-restore/#hdfs).
+
 For instructions on creating a repository, see [Register repository]({{site.url}}{{site.baseurl}}/opensearch/snapshots/snapshot-restore#register-repository).
 
 ## Endpoints
@@ -34,7 +37,10 @@
 
 ## Request parameters
 
-Request parameters depend on the type of repository: `fs` or `s3`.
+Request parameters depend on the type of repository:
+  - `fs`
+  - `s3`
+  - `hdfs`
 
 ### Common parameters
 
@@ -97,6 +103,17 @@
 The `server_side_encryption` setting is removed as of OpenSearch 3.1.0. S3 applies server-side encryption as the base level of encryption for all S3 buckets. Because this cannot be disabled, this value repository setting had no effect. For more information, see [Protecting data with server-side encryption](https://docs.aws.amazon.com/AmazonS3/latest/userguide/serv-side-encryption.html).
 {: .note}
 
+### hdfs repository
+
+ Request field                     | Description                                                                                                  
+:----------------------------------|:-------------------------------------------------------------------------------------------------------------
+| `uri`                             | The HDFS URI of the `hdfs://<HOST>:<PORT>/path/to/backup` format. Required.                                    |
+| `path`                            | The path within HDFS in which you want to store snapshots (for example, `/my/snapshot/directory`). Required. |
+| `security.principal`              | The Kerberos principal to use when connecting to HDFS. Optional.                                             |
+| `conf.<key>`                  | Additional HDFS client configuration settings (for example, `core-site.xml` or `hdfs-site.xml`). Optional.                |
+
+
+
 ## Example requests
 
 ### `fs`
@@ -254,6 +271,53 @@
     python=step1_python %}
 <!-- spec_insert_end -->
 
+### `hdfs`
+
+The following request registers a new HDFS repository using the HDFS URI `hdfs://namenode:8020` and the HDFS filesystem path `/opensearch/snapshots`:
+<!-- spec_insert_start
+component: example_code
+rest: PUT /_snapshot/my-hdfs-repository
+body: |
+{
+  "type": "hdfs",
+  "settings": {
+    "uri": "hdfs://namenode:8020",
+    "path": "/opensearch/snapshots"
+  }
+}
+-->
+{% capture step1_rest %}
+PUT /_snapshot/my-hdfs-repository
+{
+  "type": "hdfs",
+  "settings": {
+    "uri": "hdfs://namenode:8020",
+    "path": "/opensearch/snapshots"
+  }
+}
+{% endcapture %}
+
+{% capture step1_python %}
+
+
+response = client.snapshot.create_repository(
+  repository = "my-hdfs-repository",
+  body =   {
+    "type": "hdfs",
+    "settings": {
+      "uri": "hdfs://namenode:8020",
+      "path": "/opensearch/snapshots"
+    }
+  }
+)
+
+{% endcapture %}
+
+{% include code-block.html
+rest=step1_rest
+python=step1_python %}
+
+
 ## Example response
 
 Upon success, the following JSON object is returned:

_tuning-your-cluster/availability-and-recovery/snapshots/snapshot-restore.md

@@ -80,7 +80,7 @@ You will most likely not need to specify any parameters except for `location`. F
    sudo ./bin/opensearch-plugin install repository-s3
    ```
 
-   If you're using the Docker installation, see [Working with plugins]({{site.url}}{{site.baseurl}}/opensearch/install/docker#working-with-plugins). Your `Dockerfile` should look something like this:
+   If you're using the Docker installation, see [Working with plugins]({{site.url}}{{site.baseurl}}/install-and-configure/install-opensearch/docker/#working-with-plugins). Your `Dockerfile` should look similar to the following:
 
    ```
    FROM opensearchproject/opensearch:{{site.opensearch_version}}