add v1.3.0 CCM instructions

docs/capx/v1.3.x/getting_started.md

@@ -8,6 +8,9 @@ For more information on how CAPX handles credentials, visit [Credential Manageme
 
 For more information on the port requirements for CAPX, visit [Port Requirements](./port_requirements.md).
 
+!!! note
+    [Nutanix Cloud Controller Manager (CCM)](../../ccm/latest/overview.md) is a mandatory component starting from CAPX v1.3.0. Before upgrading existing CAPX installations with a version prior to v1.3.0 to v1.3.0 or later, ensure all CAPX-managed Kubernetes clusters are configured to use Nutanix CCM. See [CAPX v1.3.x Upgrade Procedure](./tasks/capx_v13x_upgrade_procedure.md).
+
 ## Production Workflow
 
 ### Build OS image for NutanixMachineTemplate resource

docs/capx/v1.3.x/tasks/capx_v13x_upgrade_procedure.md

@@ -0,0 +1,80 @@
+# CAPX v1.3.x Upgrade Procedure
+
+Starting from CAPX v1.3.0, it is required for all CAPX-managed Kubernetes clusters to use the Nutanix Cloud Controller Manager (CCM). 
+
+Before upgrading CAPX instances with a version prior to v1.3.0 to v1.3.0 or later, it is required to follow the [steps](#steps) detailed below for each of the CAPX-managed Kubernetes clusters that don't use Nutanix CCM.
+
+
+## Steps
+
+This procedure uses [Cluster Resource Set (CRS)](https://cluster-api.sigs.k8s.io/tasks/experimental-features/cluster-resource-set){target=_blank} to install Nutanix CCM but it can also be installed using the [Nutanix CCM Helm chart](https://artifacthub.io/packages/helm/nutanix/nutanix-cloud-provider){target=_blank}. 
+
+Perform following steps for each of the CAPX-managed Kubernetes clusters that are not configured to use Nutanix CCM:
+
+1. Add the `cloud-provider: external` configuration in the `KubeadmConfigTemplate` resources:
+  ```YAML
+  apiVersion: bootstrap.cluster.x-k8s.io/v1beta1
+  kind: KubeadmConfigTemplate
+  spec:
+    template:
+      spec:
+        joinConfiguration:
+          nodeRegistration:
+            kubeletExtraArgs:
+              cloud-provider: external
+  ```
+2. Add the `cloud-provider: external` configuration in the `KubeadmControlPlane` resource:
+```YAML
+---
+apiVersion: bootstrap.cluster.x-k8s.io/v1beta1
+kind: KubeadmConfigTemplate
+spec:
+  template:
+    spec:
+      joinConfiguration:
+        nodeRegistration:
+          kubeletExtraArgs:
+            cloud-provider: external
+---
+apiVersion: controlplane.cluster.x-k8s.io/v1beta1
+kind: KubeadmControlPlane
+spec:
+  kubeadmConfigSpec:
+    clusterConfiguration:
+      apiServer:
+        extraArgs:
+          cloud-provider: external
+      controllerManager:
+        extraArgs:
+          cloud-provider: external
+    initConfiguration:
+      nodeRegistration:
+        kubeletExtraArgs:
+          cloud-provider: external
+    joinConfiguration:
+      nodeRegistration:
+        kubeletExtraArgs:
+          cloud-provider: external
+```
+3. Add the Nutanix CCM CRS resources:
+
+    - [nutanix-ccm-crs.yaml](https://github.com/nutanix-cloud-native/cluster-api-provider-nutanix/blob/v1.3.0/templates/base/nutanix-ccm-crs.yaml){target=_blank}
+    - [nutanix-ccm-secret.yaml](https://github.com/nutanix-cloud-native/cluster-api-provider-nutanix/blob/v1.3.0/templates/base/nutanix-ccm-secret.yaml)
+    - [nutanix-ccm.yaml](https://github.com/nutanix-cloud-native/cluster-api-provider-nutanix/blob/v1.3.0/templates/base/nutanix-ccm.yaml)
+
+    Make sure to update each of the variables before applying the `YAML` files.
+
+4. Add the `ccm: nutanix` label to the `Cluster` resource:
+  ```YAML
+  apiVersion: cluster.x-k8s.io/v1beta1
+  kind: Cluster
+  metadata:
+    labels:
+      ccm: nutanix
+  ```
+5. Verify if the Nutanix CCM pod is up and running: 
+```
+kubectl get pod -A -l k8s-app=nutanix-cloud-controller-manager
+```
+6. Trigger a new rollout of the Kubernetes nodes by performing a Kubernetes upgrade or by using `clusterctl alpha rollout restart`. See the [clusterctl alpha rollout](https://cluster-api.sigs.k8s.io/clusterctl/commands/alpha-rollout#restart){target=_blank} for more information.
+7. Upgrade CAPX to v1.3.0 by following the [clusterctl upgrade](https://cluster-api.sigs.k8s.io/clusterctl/commands/upgrade.html?highlight=clusterctl%20upgrade%20pla#clusterctl-upgrade){target=_blank} documentation

mkdocs.yml

@@ -27,6 +27,7 @@ nav:
                 - "Credential Management": "capx/v1.3.x/credential_management.md"
                 - "Tasks":
                     - "Modifying Machine Configuration": "capx/v1.3.x/tasks/modify_machine_configuration.md"
+                    - "CAPX v1.3.x Upgrade Procedure": "capx/v1.3.x/tasks/capx_v13x_upgrade_procedure.md"
                 - "Port Requirements": "capx/v1.3.x/port_requirements.md"
                 - "User Requirements": "capx/v1.3.x/user_requirements.md"
                 - "Addons":