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+---
+layout: default
+title: Model-group access control
+parent: Integrating ML models
+has_children: false
+nav_order: 15
+---
+
+# ML model group access control
+
+**Status:** Experimental  
+**Replaces:** `plugins.ml_commons.model_access_control_enabled`
+{: .warning }
+
+This page explains how **ML Commons** integrates with the Security plugin’s **Resource Sharing and Access Control** framework to provide **document-level** authorization for **ML model groups**.
+
+> For the end-to-end framework concepts and APIs, see [Resource Sharing and Access Control]({{site.url}}{{site.baseurl}}/security/access-control/resources/)
+{: .note}
+
+---
+
+## Onboarding
+
+- **Resource type:** `ml-model-group`
+- **System index:** `.plugins-ml-model-group`
+- **Onboarded in:** `3.3`
+
+When resource-level authorization is enabled for this type, each model group’s visibility is governed by a central sharing record. Owners and users with share capability can grant or revoke access for specific **users**, **roles**, or **backend roles**.
+
+Model-groups control access to models.
+{: .note } green
+
+---
+## Enable or disable for this resource type
+
+Add the type to the protected list and enable the feature.
+
+> **Admin-only:** These settings can be configured **only by cluster administrators** (super-admins).
+{: .important }
+
+### `opensearch.yml` (3.3+)
+
+```yaml
+plugins.security.experimental.resource_sharing.enabled: true
+plugins.security.system_indices.enabled: true
+plugins.security.experimental.resource_sharing.protected_types:
+  - "ml-model-group"
+````
+
+### Dev Tools (3.4+)
+
+```curl
+PUT _cluster/settings
+{
+  "transient": {
+    "plugins.security.experimental.resource_sharing.enabled": true,
+    "plugins.security.experimental.resource_sharing.protected_types": ["ml-model-group", <existing-resource-types>]
+  }
+}
+```
+{% include copy-curl.html %}
+
+---
+
+## ML model group access levels
+
+ML-commons exposes **three access levels** for granting access to a ml-model-group:
+
+### ml_read_only
+This read-only access level grants a read and search only access to the shared model-group.
+
+Following actions are allowed with this access-level:
+```yaml
+- "cluster:admin/opensearch/ml/model_groups/get"
+- "cluster:admin/opensearch/ml/models/get"
+```
+
+### ml_read_write
+This read-write access level grants full access to a ml-model-group except share.
+
+Following actions are allowed with this access level:
+```yaml
+- "cluster:admin/opensearch/ml/*"
+```
+
+### ml_full_access
+This access level grants complete access to a ml-model-group and will allow shared user owner-like permission.
+
+Following actions are allowed with this access level:
+```yaml
+- "cluster:admin/opensearch/ml/*"
+- "cluster:admin/security/resource/share"
+```
+
+> These access-levels are non-configurable. If you would like to add more access-levels, file an issue on [the GitHub repo](https://github.com/opensearch-project/ml-commons/).
+{: .note } yellow
+
+---
+
+## Migrating from legacy framework
+
+> **Admin-only:** The migrate API can only be run **by cluster administrators** (super-admins or rest-admins).
+{: .important }
+
+Once the feature is turned on, and the resource is marked as protected it is imperative that cluster-admins call the migrate API to migrate legacy-sharing information to the new framework:
+
+### 3.3 clusters
+```curl
+POST _plugins/_security/api/resources/migrate 
+{
+  "source_index": ".plugins-ml-model-group",
+  "username_path": "/owner/name",
+  "backend_roles_path": "/owner/backend_roles",
+  "default_access_level": "<pick-one-access-level>"
+}
+```
+{% include copy-curl.html %}
+
+### 3.4+ clusters
+
+```curl
+POST _plugins/_security/api/resources/migrate 
+{
+  "source_index": ".plugins-ml-model-group",
+  "username_path": "/owner/name",
+  "backend_roles_path": "/owner/backend_roles",
+  "default_owner": "<replace-with-existing-user>",
+  "default_access_level": {
+    "ml-model-group": "<pick-one-access-level>"
+  }
+}
+```
+{% include copy-curl.html %}