diff --git a/config/schemas/config.yaml b/config/schemas/config.yaml
index c831e15e2d..4136ed1457 100644
--- a/config/schemas/config.yaml
+++ b/config/schemas/config.yaml
@@ -5300,6 +5300,22 @@ properties:
             $ref: '#/$defs/kubernetesNodeSelector'
           affinity:
             $ref: '#/$defs/io.k8s.api.core.v1.Affinity'
+          customAntiAffinity:
+            title: Custom Anti Affinity
+            description: Define custom anti-affinity rules for OpenSearch.
+            type: object
+            properties:
+              requiredDuringSchedulingIgnoredDuringExecution:
+                description: Hard anti-affinity rules.
+                type: array
+                items:
+                  $ref: '#/$defs/io.k8s.api.core.v1.PodAffinityTerm'
+              preferredDuringSchedulingIgnoredDuringExecution:
+                description: Soft anti-affinity rules.
+                type: array
+                items:
+                  $ref: '#/$defs/io.k8s.api.core.v1.WeightedPodAffinityTerm'
+            additionalProperties: false
       masterNode:
         title: OpenSearch Master Node
         description: |-
@@ -5326,6 +5342,22 @@ properties:
             $ref: '#/$defs/kubernetesTolerations'
           affinity:
             $ref: '#/$defs/io.k8s.api.core.v1.Affinity'
+            customAntiAffinity:
+              title: Custom Anti Affinity
+              description: Define custom anti-affinity rules for OpenSearch.
+              type: object
+              properties:
+                requiredDuringSchedulingIgnoredDuringExecution:
+                  description: Hard anti-affinity rules.
+                  type: array
+                  items:
+                    $ref: '#/$defs/io.k8s.api.core.v1.PodAffinityTerm'
+                preferredDuringSchedulingIgnoredDuringExecution:
+                  description: Soft anti-affinity rules.
+                  type: array
+                  items:
+                    $ref: '#/$defs/io.k8s.api.core.v1.WeightedPodAffinityTerm'
+              additionalProperties: false
       dataNode:
         title: OpenSearch Data Node
         description: |-
@@ -5357,6 +5389,22 @@ properties:
             $ref: '#/$defs/kubernetesNodeSelector'
           affinity:
             $ref: '#/$defs/io.k8s.api.core.v1.Affinity'
+          customAntiAffinity:
+            title: Custom Anti Affinity
+            description: Define custom anti-affinity rules for OpenSearch.
+            type: object
+            properties:
+              requiredDuringSchedulingIgnoredDuringExecution:
+                description: Hard anti-affinity rules.
+                type: array
+                items:
+                  $ref: '#/$defs/io.k8s.api.core.v1.PodAffinityTerm'
+              preferredDuringSchedulingIgnoredDuringExecution:
+                description: Soft anti-affinity rules.
+                type: array
+                items:
+                  $ref: '#/$defs/io.k8s.api.core.v1.WeightedPodAffinityTerm'
+            additionalProperties: false
       clientNode:
         title: OpenSearch Client Node
         description: |-
@@ -5383,6 +5431,22 @@ properties:
             $ref: '#/$defs/kubernetesNodeSelector'
           affinity:
             $ref: '#/$defs/io.k8s.api.core.v1.Affinity'
+            customAntiAffinity:
+              title: Custom Anti Affinity
+              description: Define custom anti-affinity rules for OpenSearch.
+              type: object
+              properties:
+                requiredDuringSchedulingIgnoredDuringExecution:
+                  description: Hard anti-affinity rules.
+                  type: array
+                  items:
+                    $ref: '#/$defs/io.k8s.api.core.v1.PodAffinityTerm'
+                preferredDuringSchedulingIgnoredDuringExecution:
+                  description: Soft anti-affinity rules.
+                  type: array
+                  items:
+                    $ref: '#/$defs/io.k8s.api.core.v1.WeightedPodAffinityTerm'
+              additionalProperties: false
       extraRoles:
         title: OpenSearch Extra Roles
         description: Configures extra roles for OpenSearch Security.