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MTPE: FanLin
Date: 2024-01-05
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# Implement One-Click Migration from DCE 4.0 to DCE 5.0

This section provides a walkthrough on how to achieve one-click migrating applications from DCE 4.0 to DCE 5.0 using the deployment nginx as an example, facilitated through the Multicloud Management interface.

## Prerequisites

- Connect your container management module to a cluster managed by DCE. For instructions on how to do this, please refer to the [Manage Worker Clusters](../cluster.md) guide. After the connection is established, ensure that you can access the UI interface of the cluster.

- Confirm that the workload in your DCE 4.0 cluster is functioning normally. This tutorial assumes that your DCE 4.0 cluster is in good working condition.

## One-Click Migration

1. Navigate to the multicloud instance and select __Worker Clusters__. Click __Integrate Cluster__ and choose to connect the DCE4 cluster to the multicloud instance.

    ![Integrate Cluster](../images/conversion01.png)

2. Proceed to __Multicloud Workloads__ -> __Deployment__. Click __Convert Now__ and select the target application. The related service will be selected automatically, and the corresponding configmaps and secrets will also undergo synchronous conversion.

    ![Convert Now](../images/conversion02.png)

    ![Sync Convert](../images/conversion03.png)

3. Click __Update__ after a successful conversion, select the target deployment cluster, and enable automatic propagation. This will automatically detect and propagate resources such as ConfigMap and Secret used in the multicloud workload configuration.

    ![Update nginx](../images/conversion04.png)

4. Update the service's propagation policies and select the relevant clusters.

    ![Update PP](../images/conversion05.png)

5. Confirm the successful operation of multicloud nginx: Ensure that Pods in both clusters are running successfully and are accessible.

    ![Confirm Operation](../images/conversion06.png)

6. The nginx workload in the DCE4 cluster will remain unaffected, ensuring the continuous service of the application.

    ![Uninterrupted Service](../images/conversion07.png)