DOC-5617 RS: Added rladmin commands to change node roles

Author: rrelledge

content/operate/rs/clusters/change-node-role.md

@@ -14,11 +14,15 @@ A Redis Software cluster contains a primary node, which coordinates cluster-wide
 
 ## Demote primary node
 
+{{< multitabs id="demote-node" 
+tab1="Cluster Manager UI"
+tab2="rladmin" >}}
+
 To demote the primary node to a secondary node using the Cluster Manager UI:
 
-1. On the **Nodes** screen, click {{< image filename="/images/rs/buttons/button-toggle-actions-vertical.png#no-click" alt="More actions button" width="22px" class="inline" >}} for the node you want to promote.
+1. On the **Nodes** screen, click <img src="/images/rs/buttons/button-toggle-actions-vertical.png#no-click" alt="More actions button" width="22px" class="inline"> for the primary node you want to demote.
 
-    {{<image filename="images/rs/screenshots/nodes/primary-node-more-actions.png" alt="Click the more actions button for a node to access node actions.">}}
+    <img src="../../../../images/rs/screenshots/nodes/primary-node-more-actions.png" alt="Click the more actions button for a node to access node actions.">
 
 1. Select **Set as a secondary node** from the list.
 
@@ -28,20 +32,73 @@ To demote the primary node to a secondary node using the Cluster Manager UI:
 
     - **Choose specific node**: You can manually select which node becomes the new primary node.
 
-    {{<image filename="images/rs/screenshots/nodes/primary-node-set-as-secondary-dialog.png" alt="The Set as a secondary node dialog has two options to select the new primary node, either automatically or manually.">}}
+    <img src="../../../../images/rs/screenshots/nodes/primary-node-set-as-secondary-dialog.png" alt="The Set as a secondary node dialog has two options to select the new primary node, either automatically or manually.">
 
 1. Click **Confirm**.
 
+-tab-sep-
+
+To demote the primary node to a secondary node using `rladmin`:
+
+1. Identify the primary node's ID with [`rladmin cluster master`]({{<relref "/operate/rs/references/cli-utilities/rladmin/cluster/master">}}):
+
+    ```sh
+    $ rladmin cluster master
+    Node <primary-node-id> is the cluster master node
+    ```
+
+1. Run [`rladmin node enslave`]({{<relref "/operate/rs/references/cli-utilities/rladmin/node/enslave/#node-enslave">}}) with the `demote_node` option:
+
+    ```sh
+    rladmin node <primary-node-ID> enslave demote_node
+    ```
+
+    Replace `<primary-node-ID>` with the ID returned by `rladmin cluster master`.
+
+{{< /multitabs >}}
+
 ## Promote secondary node
 
+{{< multitabs id="promote-node" 
+tab1="Cluster Manager UI"
+tab2="rladmin" >}}
+
 To promote a secondary node to become the primary node using the Cluster Manager UI:
 
-1. On the **Nodes** screen, click {{< image filename="/images/rs/buttons/button-toggle-actions-vertical.png#no-click" alt="More actions button" width="22px" class="inline" >}} for the node you want to promote.
+1. On the **Nodes** screen, click <img src="/images/rs/buttons/button-toggle-actions-vertical.png#no-click" alt="More actions button" width="22px" class="inline"> for the secondary node you want to promote.
 
-    {{<image filename="images/rs/screenshots/nodes/secondary-nodes-more-actions.png" alt="Click the more actions button for a node to access node actions.">}}
+    <img src="../../../../images/rs/screenshots/nodes/secondary-nodes-more-actions.png" alt="Click the more actions button for a node to access node actions.">
 
 1. Select **Set as the primary node** from the list.
 
 1. Click **Confirm**.
 
+
+-tab-sep-
+
+To promote a secondary node to become the primary node using `rladmin`:
+
+1. To find the IDs of secondary nodes, run [`rladmin status nodes`]({{<relref "/operate/rs/references/cli-utilities/rladmin/status#status-nodes">}}):
+
+    ```sh
+    $ rladmin status nodes
+    CLUSTER NODES:
+    NODE:ID     ROLE       ADDRESS          EXTERNAL_ADDRESS          HOSTNAME            SHARDS     CORES          FREE_RAM                 PROVISIONAL_RAM          VERSION        STATUS   
+    node:1      master     198.51.100.2                                 3d99db1fdf4b        4/100      6              14.74GB/19.54GB          10.73GB/16.02GB          7.22.0-250     OK       
+    *node:3     slave      198.51.100.4                                 b87cc06c830f        0/100      6              14.74GB/19.54GB          11.22GB/16.02GB          7.22.0-250     OK       
+    node:2      slave      198.51.100.3                                 fc7a3d332458        0/100      6              14.74GB/19.54GB          11.22GB/16.02GB          7.22.0-250     OK       
+    ```
+
+    Nodes with the `slave` role are secondary nodes.
+
+1. Run [`rladmin cluster master set`]({{<relref "/operate/rs/references/cli-utilities/rladmin/cluster/master">}}):
+
+    ```sh
+    rladmin cluster master set <secondary-node-ID>
+    ```
+
+    Replace `<secondary-node-ID>` with the ID of the secondary node you want to promote.
+
+{{< /multitabs >}}
+
 After this node becomes the primary node, all cluster management traffic is directed to it.