diff --git a/doc/source/user/index.rst b/doc/source/user/index.rst
index 60abf20613..5089eeab10 100644
--- a/doc/source/user/index.rst
+++ b/doc/source/user/index.rst
@@ -32,6 +32,7 @@ created and managed by Magnum to support the COE's.
 #. `Image Management`_
 #. `Notification`_
 #. `Container Monitoring`_
+#. `Kubernetes Post Install Manifest`_
 #. `Kubernetes External Load Balancer`_
 #. `Rolling Upgrade`_
 #. `Keystone Authentication and Authorization for Kubernetes`_
@@ -3380,6 +3381,18 @@ the service is running, the Grafana dashboards can be accessed through port
 For both Prometheus and Grafana, there is an assigned *systemd* service
 called *kube-enable-monitoring*.
 
+Kubernetes Post Install Manifest
+================================
+
+A new config option `post_install_manifest_url` under `[kubernetes]` section
+has been added to support installing cloud provider/vendor specific manifest
+after provisioning the k8s cluster. It's an URL pointing to the manifest file.
+For example, cloud admin can set their specific `StorageClass` into this file,
+then it will be automatically setup after the cluster is created by end user.
+
+**NOTE:** The URL must be reachable from the master nodes when creating the
+cluster.
+
 Kubernetes External Load Balancer
 =================================
 
diff --git a/magnum/conf/kubernetes.py b/magnum/conf/kubernetes.py
index 2de9370e2b..35f40d0d39 100644
--- a/magnum/conf/kubernetes.py
+++ b/magnum/conf/kubernetes.py
@@ -22,6 +22,12 @@ kubernetes_opts = [
                     'Keystone auth policy for Kubernetes cluster when '
                     'the Keystone auth is enabled. Vendors can put their '
                     'specific default policy here'),
+    cfg.StrOpt('post_install_manifest_url',
+               default="",
+               help='An URL of the manifest file will be installed after '
+                    'the Kubernetes cluster created. For exmaple, this '
+                    'could be a file including the vendor specific '
+                    'storage class.'),
 ]
 
 
diff --git a/magnum/drivers/common/templates/kubernetes/fragments/kube-apiserver-to-kubelet-role.sh b/magnum/drivers/common/templates/kubernetes/fragments/kube-apiserver-to-kubelet-role.sh
index 9f67a45886..e647f293b1 100644
--- a/magnum/drivers/common/templates/kubernetes/fragments/kube-apiserver-to-kubelet-role.sh
+++ b/magnum/drivers/common/templates/kubernetes/fragments/kube-apiserver-to-kubelet-role.sh
@@ -443,4 +443,9 @@ kind: List
 metadata: {}
 EOF
 
+# Post install file to setup some cloud provider/vendor specific configs
+if [ "$POST_INSTALL_MANIFEST_URL" != "" ]; then
+    kubectl apply -f "$POST_INSTALL_MANIFEST_URL"
+fi
+
 printf "Finished running ${step}\n"
diff --git a/magnum/drivers/common/templates/kubernetes/fragments/write-heat-params-master.sh b/magnum/drivers/common/templates/kubernetes/fragments/write-heat-params-master.sh
index f8ba6e4f7d..4768c081e1 100644
--- a/magnum/drivers/common/templates/kubernetes/fragments/write-heat-params-master.sh
+++ b/magnum/drivers/common/templates/kubernetes/fragments/write-heat-params-master.sh
@@ -137,6 +137,7 @@ CONTAINER_RUNTIME="$CONTAINER_RUNTIME"
 CONTAINERD_VERSION="$CONTAINERD_VERSION"
 CONTAINERD_TARBALL_URL="$CONTAINERD_TARBALL_URL"
 CONTAINERD_TARBALL_SHA256="$CONTAINERD_TARBALL_SHA256"
+POST_INSTALL_MANIFEST_URL="$POST_INSTALL_MANIFEST_URL"
 EOF
 }
 
diff --git a/magnum/drivers/heat/k8s_fedora_template_def.py b/magnum/drivers/heat/k8s_fedora_template_def.py
index 59f69d76cc..48ac7f894e 100644
--- a/magnum/drivers/heat/k8s_fedora_template_def.py
+++ b/magnum/drivers/heat/k8s_fedora_template_def.py
@@ -127,6 +127,8 @@ class K8sFedoraTemplateDefinition(k8s_template_def.K8sTemplateDefinition):
             csr_keys["private_key"].replace("\n", "\\n")
 
         extra_params['project_id'] = cluster.project_id
+        extra_params['post_install_manifest_url'] = \
+            CONF.kubernetes.post_install_manifest_url
 
         if not extra_params.get('max_node_count'):
             extra_params['max_node_count'] = cluster.node_count + 1
diff --git a/magnum/drivers/k8s_fedora_atomic_v1/templates/kubecluster.yaml b/magnum/drivers/k8s_fedora_atomic_v1/templates/kubecluster.yaml
index 798af2cc67..990f60ef51 100644
--- a/magnum/drivers/k8s_fedora_atomic_v1/templates/kubecluster.yaml
+++ b/magnum/drivers/k8s_fedora_atomic_v1/templates/kubecluster.yaml
@@ -840,6 +840,13 @@ parameters:
     description: sha256 of the target containerd tarball.
     default: '1f2f0fb928179df90492a83c326a194b8e9d992538498efb44cbb6ef15465627'
 
+  post_install_manifest_url:
+    type: string
+    description: >
+      Post install manifest URL used to setup some cloud provider/vendor
+      specific configs
+    default: ""
+
 resources:
 
   ######################################################################
@@ -1169,6 +1176,7 @@ resources:
           containerd_version: {get_param: containerd_version}
           containerd_tarball_url: {get_param: containerd_tarball_url}
           containerd_tarball_sha256: {get_param: containerd_tarball_sha256}
+          post_install_manifest_url: {get_param: post_install_manifest_url}
 
   kube_cluster_config:
     condition: create_cluster_resources
diff --git a/magnum/drivers/k8s_fedora_atomic_v1/templates/kubemaster.yaml b/magnum/drivers/k8s_fedora_atomic_v1/templates/kubemaster.yaml
index 82137a122f..28d2ce33cb 100644
--- a/magnum/drivers/k8s_fedora_atomic_v1/templates/kubemaster.yaml
+++ b/magnum/drivers/k8s_fedora_atomic_v1/templates/kubemaster.yaml
@@ -591,6 +591,12 @@ parameters:
     type: string
     description: sha256 of the target containerd tarball.
 
+  post_install_manifest_url:
+    type: string
+    description: >
+      Post install manifest url to setup some cloud provider/vendor
+      specific configs
+
 conditions:
 
   image_based: {equals: [{get_param: boot_volume_size}, 0]}
@@ -769,6 +775,7 @@ resources:
                   "$CONTAINERD_VERSION": {get_param: containerd_version}
                   "$CONTAINERD_TARBALL_URL": {get_param: containerd_tarball_url}
                   "$CONTAINERD_TARBALL_SHA256": {get_param: containerd_tarball_sha256}
+                  "$POST_INSTALL_MANIFEST_URL": {get_param: post_install_manifest_url}
             - get_file: ../../common/templates/kubernetes/fragments/install-cri.sh
             - get_file: ../../common/templates/kubernetes/fragments/make-cert.sh
             - str_replace:
diff --git a/magnum/drivers/k8s_fedora_coreos_v1/templates/kubecluster.yaml b/magnum/drivers/k8s_fedora_coreos_v1/templates/kubecluster.yaml
index 81f2829b75..2aaa797b69 100644
--- a/magnum/drivers/k8s_fedora_coreos_v1/templates/kubecluster.yaml
+++ b/magnum/drivers/k8s_fedora_coreos_v1/templates/kubecluster.yaml
@@ -842,6 +842,13 @@ parameters:
     description: sha256 of the target containerd tarball.
     default: '1f2f0fb928179df90492a83c326a194b8e9d992538498efb44cbb6ef15465627'
 
+  post_install_manifest_url:
+    type: string
+    description: >
+      Post install manifest URL used to setup some cloud provider/vendor
+      specific configs
+    default: ""
+
 resources:
 
   ######################################################################
@@ -1173,6 +1180,7 @@ resources:
           containerd_version: {get_param: containerd_version}
           containerd_tarball_url: {get_param: containerd_tarball_url}
           containerd_tarball_sha256: {get_param: containerd_tarball_sha256}
+          post_install_manifest_url: {get_param: post_install_manifest_url}
 
   kube_cluster_config:
     condition: create_cluster_resources
diff --git a/magnum/drivers/k8s_fedora_coreos_v1/templates/kubemaster.yaml b/magnum/drivers/k8s_fedora_coreos_v1/templates/kubemaster.yaml
index 16b6c71692..e37334ad51 100644
--- a/magnum/drivers/k8s_fedora_coreos_v1/templates/kubemaster.yaml
+++ b/magnum/drivers/k8s_fedora_coreos_v1/templates/kubemaster.yaml
@@ -601,6 +601,12 @@ parameters:
     type: string
     description: sha256 of the target containerd tarball.
 
+  post_install_manifest_url:
+    type: string
+    description: >
+      Post install manifest url to setup some cloud provider/vendor
+      specific configs
+
 conditions:
 
   image_based: {equals: [{get_param: boot_volume_size}, 0]}
@@ -782,6 +788,7 @@ resources:
                   "$CONTAINERD_VERSION": {get_param: containerd_version}
                   "$CONTAINERD_TARBALL_URL": {get_param: containerd_tarball_url}
                   "$CONTAINERD_TARBALL_SHA256": {get_param: containerd_tarball_sha256}
+                  "$POST_INSTALL_MANIFEST_URL": {get_param: post_install_manifest_url}
             - get_file: ../../common/templates/kubernetes/fragments/install-cri.sh
             - get_file: ../../common/templates/kubernetes/fragments/make-cert.sh
             - str_replace:
diff --git a/magnum/tests/unit/conductor/handlers/test_k8s_cluster_conductor.py b/magnum/tests/unit/conductor/handlers/test_k8s_cluster_conductor.py
index cfe35754d4..556759d5c6 100644
--- a/magnum/tests/unit/conductor/handlers/test_k8s_cluster_conductor.py
+++ b/magnum/tests/unit/conductor/handlers/test_k8s_cluster_conductor.py
@@ -373,6 +373,7 @@ class TestClusterConductorWithK8s(base.TestCase):
             'worker_role': 'worker',
             'master_nodegroup_name': 'master_ng',
             'worker_nodegroup_name': 'worker_ng',
+            'post_install_manifest_url': '',
         }
 
         if missing_attr is not None:
@@ -524,6 +525,7 @@ class TestClusterConductorWithK8s(base.TestCase):
             'worker_role': 'worker',
             'master_nodegroup_name': 'master_ng',
             'worker_nodegroup_name': 'worker_ng',
+            'post_install_manifest_url': '',
         }
 
         self.assertEqual(expected, definition)
@@ -657,6 +659,7 @@ class TestClusterConductorWithK8s(base.TestCase):
             'worker_role': 'worker',
             'master_nodegroup_name': 'master_ng',
             'worker_nodegroup_name': 'worker_ng',
+            'post_install_manifest_url': '',
         }
         self.assertEqual(expected, definition)
         self.assertEqual(
@@ -1112,6 +1115,7 @@ class TestClusterConductorWithK8s(base.TestCase):
             'worker_role': 'worker',
             'master_nodegroup_name': 'master_ng',
             'worker_nodegroup_name': 'worker_ng',
+            'post_install_manifest_url': '',
         }
         self.assertEqual(expected, definition)
         self.assertEqual(
diff --git a/magnum/tests/unit/drivers/test_template_definition.py b/magnum/tests/unit/drivers/test_template_definition.py
index 2279da2c53..0e4cd78352 100644
--- a/magnum/tests/unit/drivers/test_template_definition.py
+++ b/magnum/tests/unit/drivers/test_template_definition.py
@@ -697,6 +697,7 @@ class AtomicK8sTemplateDefinitionTestCase(BaseK8sTemplateDefinitionTestCase):
             'containerd_version': containerd_version,
             'containerd_tarball_url': containerd_tarball_url,
             'containerd_tarball_sha256': containerd_tarball_sha256,
+            'post_install_manifest_url': '',
         }}
         mock_get_params.assert_called_once_with(mock_context,
                                                 mock_cluster_template,
@@ -1178,6 +1179,7 @@ class AtomicK8sTemplateDefinitionTestCase(BaseK8sTemplateDefinitionTestCase):
             'containerd_version': containerd_version,
             'containerd_tarball_url': containerd_tarball_url,
             'containerd_tarball_sha256': containerd_tarball_sha256,
+            'post_install_manifest_url': '',
         }}
         mock_get_params.assert_called_once_with(mock_context,
                                                 mock_cluster_template,
diff --git a/releasenotes/notes/support-post-install-file-1fe7afe7698dd7b2.yaml b/releasenotes/notes/support-post-install-file-1fe7afe7698dd7b2.yaml
new file mode 100644
index 0000000000..4f5d802c4a
--- /dev/null
+++ b/releasenotes/notes/support-post-install-file-1fe7afe7698dd7b2.yaml
@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    A new config option `post_install_manifest_url` is added to support installing
+    cloud provider/vendor specific manifest after booted the k8s cluster.
+    It's an URL pointing to the manifest file. For example, cloud admin
+    can set their specific storageclass into this file, then it will be
+    automatically setup after created the cluster.