Integrate IO Based AdmissionController to AdmissionControl Framework (#12702)

* Integrate IO Based AdmissionController to AdmissionControl Framework (#12583)
---------
Signed-off-by: Ajay Kumar Movva <movvaam@amazon.com>
Co-authored-by: Ajay Kumar Movva <movvaam@amazon.com>

Author: ajaymovva

CHANGELOG.md

@@ -116,6 +116,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Make search query counters dynamic to support all query types ([#12601](https://github.com/opensearch-project/OpenSearch/pull/12601))
 - [Tiered caching] Add policies controlling which values can enter pluggable caches [EXPERIMENTAL] ([#12542](https://github.com/opensearch-project/OpenSearch/pull/12542))
 - [Tiered caching] Add Stale keys Management and CacheCleaner to IndicesRequestCache ([#12625](https://github.com/opensearch-project/OpenSearch/pull/12625))
+- [Admission Control] Integrated IO Based AdmissionController to AdmissionControl Framework ([#12583](https://github.com/opensearch-project/OpenSearch/pull/12583))
 
 ### Dependencies
 - Bump `peter-evans/find-comment` from 2 to 3 ([#12288](https://github.com/opensearch-project/OpenSearch/pull/12288))

server/src/internalClusterTest/java/org/opensearch/ratelimitting/admissioncontrol/AdmissionControlMultiNodeIT.java

@@ -140,6 +140,7 @@
 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;
@@ -708,6 +709,9 @@ public void apply(Settings value, Settings current, Settings previous) {
                 CpuBasedAdmissionControllerSettings.CPU_BASED_ADMISSION_CONTROLLER_TRANSPORT_LAYER_MODE,
                 CpuBasedAdmissionControllerSettings.INDEXING_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,
                 IndicesService.CLUSTER_INDEX_RESTRICT_REPLICATION_TYPE_SETTING,
                 // Concurrent segment search settings
                 SearchService.CLUSTER_CONCURRENT_SEGMENT_SEARCH_SETTING,

server/src/main/java/org/opensearch/common/settings/ClusterSettings.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();
     }