[DOC] Update ingest pipelines content and page navigation

_api-reference/ingest-apis/index.md

@@ -9,6 +9,157 @@ redirect_from:
 
 # Ingest APIs
 
-Before you index your data, OpenSearch's ingest APIs help transform your data by creating and managing ingest pipelines. Pipelines consist of **processors**, customizable tasks that run in the order they appear in the request body. The transformed data appears in your index after each of the processor completes.
+OpenSearch ingest APIs simplify the data ingestion process with a standard and structured way to process input data. Particularly, ingest APIs manage tasks for ingest pipelines and processors. Ingest pipelines preprocess and transform data before it's indexed in OpenSearch. A pipeline consists of processors, customizable tasks that run specific changes sequentially on incoming documents. The transformed data is then ingested in your index.
 
-Ingest pipelines in OpenSearch can only be managed using ingest API operations. When using ingest in production environments, your cluster should contain at least one node with the node roles permission set to `ingest`. For more information on setting up node roles within a cluster, see [Cluster Formation]({{site.url}}{{site.baseurl}}/opensearch/cluster/).
+The key fields typically used in a pipeline are `description` and `processors`. The `description` is an optional field that provides a description of the pipeline's purpose or functionality. The `processors` field is an array that defines the sequence of processing stages within the pipeline. The output of one processor becomes the input for the next.
+
+```json
+{
+  "description" : "...",
+  "processors" : [ ... ]
+}
+```
+
+## OpenSearch ingest processor types
+
+To see the list of available processors in your version of OpenSearch, run the following command:
+
+```json
+GET /_nodes/ingest
+```
+{% include copy-curl.html %}
+
+Your response should be similar to the following:
+
+```json
+{
+  "_nodes" : {
+    "total" : 1,
+    "successful" : 1,
+    "failed" : 0
+  },
+  "cluster_name" : "opensearch-cluster",
+  "nodes" : {
+    "i9hLyCxYTqOpa22BcJkKyg" : {
+      "name" : "opensearch-node1",
+      "transport_address" : "172.18.0.3:9300",
+      "host" : "172.18.0.3",
+      "ip" : "172.18.0.3",
+      "version" : "2.7.0",
+      "build_type" : "tar",
+      "build_hash" : "b7a6e09e492b1e965d827525f7863b366ef0e304",
+      "roles" : [
+        "cluster_manager",
+        "data",
+        "ingest",
+        "remote_cluster_client"
+      ],
+      "attributes" : {
+        "shard_indexing_pressure_enabled" : "true"
+      },
+      "ingest" : {
+        "processors" : [
+          {
+            "type" : "append"
+          },
+          {
+            "type" : "bytes"
+          },
+          {
+            "type" : "convert"
+          },
+          {
+            "type" : "csv"
+          },
+          {
+            "type" : "date"
+          },
+          {
+            "type" : "date_index_name"
+          },
+          {
+            "type" : "dissect"
+          },
+          {
+            "type" : "dot_expander"
+          },
+          {
+            "type" : "drop"
+          },
+          {
+            "type" : "fail"
+          },
+          {
+            "type" : "foreach"
+          },
+          {
+            "type" : "geoip"
+          },
+          {
+            "type" : "geojson-feature"
+          },
+          {
+            "type" : "grok"
+          },
+          {
+            "type" : "gsub"
+          },
+          {
+            "type" : "html_strip"
+          },
+          {
+            "type" : "join"
+          },
+          {
+            "type" : "json"
+          },
+          {
+            "type" : "kv"
+          },
+          {
+            "type" : "lowercase"
+          },
+          {
+            "type" : "pipeline"
+          },
+          {
+            "type" : "remove"
+          },
+          {
+            "type" : "rename"
+          },
+          {
+            "type" : "script"
+          },
+          {
+            "type" : "set"
+          },
+          {
+            "type" : "sort"
+          },
+          {
+            "type" : "split"
+          },
+          {
+            "type" : "text_embedding"
+          },
+          {
+            "type" : "trim"
+          },
+          {
+            "type" : "uppercase"
+          },
+          {
+            "type" : "urldecode"
+          },
+          {
+            "type" : "user_agent"
+          }
+        ]
+      }
+    }
+  }
+}
+```
+
+Get started with [creating an ingest pipeline]({{site.url}}{{site.baseurl}}/api-reference/ingest-apis/ingest-pipelines/) in OpenSearch, or learn more about OpenSearch [ingest processors]({{site.url}}{{site.baseurl}}/api-reference/ingest-apis/ingest-processors/).