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Prerequisites

1. Create a new node for Kyvos Manager, and ensure the following:

   1. This node should have the same set of permissions in terms of roles, tags (UsedBy / CreatedBy, CLUSTER_ID, ROLE : KM, LAYER : KM_Service), network access rules and permissions (VirtaulNetwork, Subnet, Security Group, Resource Group), credentials, size and instance type, disk organization (mount point, disks, directories where Kyvos Manager and Kyvos installed) as that of the original Kyvos Manager node which doesn’t exist anymore.

   2. For access purposes, you need to either add the same security group or the security group added must have the same set of access rules and permissions.

   3. If Secrets Manager/Key Vault is in use, then ensure that the roles assigned to the new Kyvos Manager node have access to the Secrets Manager/Key Vault.

   4. Ensure that roles assigned to the new Kyvos Manager node have access to the S3 bucket/ABFS account.

2. If the Kyvos Manager node is created by attaching a disk image of any old Kyvos Manager node, then ensure the below in mentioned sequence:

   1. Agent service is stopped on that node.

   2. Agent cron entry deleted from crontab.

   3. Kyvos Manager Agent and Kyvos folders were deleted from it.

3. The OS commands must be present in the path of a non-interactive login session for the user account used to log in to the nodes.

4. To restore Kyvos Manager on the new node, download a script file named disaster-recovery-kyvosmanager.sh from the DFS at path <engine_work>/setup/scripts/ and execute that script. This will restore the Kyvos Manager server and the Kyvos Manager service will start automatically.

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4. On the displayed confirmation dialog box, provide your Kyvos Manager password, and click the Uninstall button.

   

   A new browser tab is opened, showing uninstall Zookeeper operation details and status. You may switch back to the Disaster Recovery browser tab once the operation is completed.

5. Click the Delete button corresponding to Step 3: Delete Offline Nodes.

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6. From the Delete Offline Nodes dialog box, select the nodes you want to delete and provide your Kyvos Manager Password.
   Note that you will see only the Offline nodes in this list.

7. Click the Delete button.

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Note Once deleted, nodes cannot be retrieved. You may switch back to the Disaster Recovery browser tab. Once the operation is completed, you will see the status shown in the following figure. At this point, you will be able to perform the next step for adding new nodes. Image RemovedImage Added

8. Click the Add button corresponding to Step 4: Add Nodes. On the Add Nodes dialog box, click the Next button.
   Ensure that you can add as many new nodes as you need.

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9. Once done, provide your Kyvos Manager Password, and click the Add button.

   A new browser tab is opened, showing add node operation details and status. You may switch back to the Disaster Recovery browser tab.
   Once the operation is completed, you will see the status shown in the following figure. At this point, you will be able to perform the next step for installing Zookeeper.

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10. Click the Install button corresponding to Step 5: Install Zookeeper.

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11. Provide your Kyvos Manager Password on the confirmation boxand click the Install button.

    A new browser tab is opened, showing install Zookeeper operation details and status. You may switch back to the Disaster Recovery browser tab once the operation is completed.

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12. Click the Switch button corresponding to Step 6: Switch Repository. You will be redirected to the Switch Repository page.
    Refer to the Manage Kyvos Repository section to learn more.

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