[Backport 2.x] Integrate IO Based AdmissionController to AdmissionControl Framework

CHANGELOG.md

@@ -19,6 +19,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - The org.opensearch.bootstrap.Security should support codebase for JAR files with classifiers ([#12586](https://github.com/opensearch-project/OpenSearch/issues/12586))
 - Remote reindex: Add support for configurable retry mechanism ([#12561](https://github.com/opensearch-project/OpenSearch/pull/12561))
 - Tracing for deep search path ([#12103](https://github.com/opensearch-project/OpenSearch/pull/12103))
+- [Admission Control] Integrated IO Based AdmissionController to AdmissionControl Framework ([#12583](https://github.com/opensearch-project/OpenSearch/pull/12583))
 
 ### Dependencies
 - Bump `com.squareup.okio:okio` from 3.7.0 to 3.8.0 ([#12290](https://github.com/opensearch-project/OpenSearch/pull/12290))

server/src/main/java/org/opensearch/common/settings/ClusterSettings.java

@@ -139,6 +139,7 @@
 import org.opensearch.plugins.PluginsService;
 import org.opensearch.ratelimitting.admissioncontrol.AdmissionControlSettings;
 import org.opensearch.ratelimitting.admissioncontrol.settings.CpuBasedAdmissionControllerSettings;
+import org.opensearch.ratelimitting.admissioncontrol.settings.IoBasedAdmissionControllerSettings;
 import org.opensearch.repositories.fs.FsRepository;
 import org.opensearch.rest.BaseRestHandler;
 import org.opensearch.script.ScriptService;
@@ -712,7 +713,10 @@ public void apply(Settings value, Settings current, Settings previous) {
                 AdmissionControlSettings.ADMISSION_CONTROL_TRANSPORT_LAYER_MODE,
                 CpuBasedAdmissionControllerSettings.CPU_BASED_ADMISSION_CONTROLLER_TRANSPORT_LAYER_MODE,
                 CpuBasedAdmissionControllerSettings.INDEXING_CPU_USAGE_LIMIT,
-                CpuBasedAdmissionControllerSettings.SEARCH_CPU_USAGE_LIMIT
+                CpuBasedAdmissionControllerSettings.SEARCH_CPU_USAGE_LIMIT,
+                IoBasedAdmissionControllerSettings.IO_BASED_ADMISSION_CONTROLLER_TRANSPORT_LAYER_MODE,
+                IoBasedAdmissionControllerSettings.SEARCH_IO_USAGE_LIMIT,
+                IoBasedAdmissionControllerSettings.INDEXING_IO_USAGE_LIMIT
             )
         )
     );

server/src/main/java/org/opensearch/node/resource/tracker/NodeResourceUsageTracker.java

@@ -8,6 +8,7 @@
 
 package org.opensearch.node.resource.tracker;
 
+import org.apache.lucene.util.Constants;
 import org.opensearch.common.lifecycle.AbstractLifecycleComponent;
 import org.opensearch.common.settings.ClusterSettings;
 import org.opensearch.common.settings.Settings;
@@ -69,6 +70,9 @@ public IoUsageStats getIoUsageStats() {
      * Checks if all of the resource usage trackers are ready
      */
     public boolean isReady() {
+        if (Constants.LINUX) {
+            return memoryUsageTracker.isReady() && cpuUsageTracker.isReady() && ioUsageTracker.isReady();
+        }
         return memoryUsageTracker.isReady() && cpuUsageTracker.isReady();
     }