Migrating On-premises Servers to Huawei Cloud

Scenario

This section describes how to use MgC to migrate on-premises servers to Huawei Cloud.

Preparations

• Prepare a Windows server for installing the MgC Agent (formerly Edge) in the source intranet environment. The Windows server must:
  • Be able to access the Internet and the domain names of MgC, IoTDA, and other cloud services. For details about the domain names to be accessed, see Domain Names.
  • Allow the ports required by the MgC Agent (formerly Edge). For details about the required ports, see Communication Matrix.
  • Use PowerShell 3.0 or later.
  • Have at least 4 CPUs and 8 GB of memory.
  • Allow outbound traffic on 8883 if the server is in a security group.
  • Not have any antivirus or protection software enabled. This type of software may stop the MgC Agent from executing migration commands, resulting in migration failures.
  

  Do not install the MgC Agent on a source server to be migrated.

  • High resource consumption: The MgC Agent consumes CPU and memory resources during collection and migration. If a large number of migration tasks are performed by the MgC Agent, services on the source server may be affected.
  • Port occupation: The MgC Agent occupies some ports on the server, which may affect services running on it.
• If there are Windows source servers to be migrated, these servers must:
  • Allow access from the server where the MgC Agent is installed over port 5985.
  • Have WinRM enabled and have connected to the server where the MgC Agent is installed. For more information, see How Do I Configure WinRM on a Windows Source Server and Troubleshoot WinRM Connection Problems?
  • Allow the execution of shell scripts. Open PowerShell on the source servers as an administrator and run the following command to view the current execution policy:

    Get-ExecutionPolicy

    If Restricted is returned, no script can be executed. Run the following command and enter Y to change the policy to RemoteSigned:

    Set-ExecutionPolicy RemoteSigned

• If there are Linux source servers to be migrated, these servers must:
  • Allow access from the server where the MgC Agent is installed over port 22.
  • Allow direct root access. That means remote connections using root with SSH or other tools must be allowed on these Linux source servers.
  • Have SFTP and SSH enabled.
  • Support the following SSH connection security algorithms:

    ssh-ed25519, ecdsa-sha2-nistp256, ecdsa-sha2-nistp384, ecdsa-sha2-nistp521, rsa-sha2-512, and rsa-sha2-256

    If a server does not support the preceding security algorithms, you are advised to upgrade OpenSSH to 8.0 or later. Otherwise, deep collection cannot be performed for that server.

  • Have their iptables configured to allow all communications with the server where the MgC Agent is installed. Run the following command on the source servers. If the source field in the command output contains the IP address and port of the server where the MgC Agent is installed, it means that the MgC Agent is not allowed to access these source servers. In this case, ensure that access from the MgC Agent is permitted

    iptables -L INPUT -v -n

    

• Prepare a Huawei account or an IAM user that can access MgC. For details, see Preparations.
• Create a migration project on the MgC console.

Notes

Before creating a server migration workflow, read and understand the following precautions.

Step 1: Download and Install the MgC Agent (Formerly Edge)

Install the MgC Agent and connect it to MgC. For more information, see Installing the MgC Agent.

Step 2: Add Servers to MgC

1. Sign in to the MgC console. In the navigation pane, under Project, select an application migration project from the drop-down list.
2. In the navigation pane, choose Discover > Source Resources.
3. On the Servers tab, click Add above the list.
   Figure 1 Adding a server
   

4. In the displayed dialog box, configure parameters listed in Table 1 and click Confirm. The system automatically checks the credential status and starts collecting resource details.

   Table 1 Parameters for adding a server

   Parameter	Description
   Name	Enter a server name.
   MgC Agent	Select the MgC Agent installed in the source environment.
   Type	Select the OS type of the source server.
   Access IP Address	Enter the IP address of the source server. If the source server is in the same VPC as the MgC Agent, you can enter the private IP address of the server. Otherwise, you have to enter its public IP address.
   Port	Enter the port on the source server that allows access from the MgC Agent. By default, port 5985 on Windows source servers must be opened to the MgC Agent. The port cannot be changed. By default, port 22 on Linux source servers must be opened to the MgC Agent. You can specify a different port if needed.
   Credential	Select the server credential. If the credential is not displayed in the list, go to the MgC Agent console, add the server credential, and synchronize it to MgC.

5. After the server is added, view it in the list.

Step 3: Group Servers as an Application

You can group the added servers as an application to get sizing recommendations for target resources and execute the migration.

1. On the Resources page, in the Servers list, select the servers to be grouped as an application and click Group as Application above the list.
2. Select an application from the drop-down list. If no applications are available, click Create Application. In the displayed dialog box, enter an application name and description; select a business scenario, environment, and target region; and click Create. For more information, see Creating an Application.
3. Click OK. You can view the application name in the Application column of these servers.

(Optional) Step 4: Associate Source Servers with Existing Servers on Huawei Cloud

If you have servers on Huawei Cloud, you can associate source servers with these existing Huawei Cloud servers. These Huawei Cloud servers will be used to receive data migrated from their paired source servers. Then you can skip step 5 and go to Step 6: Create a Migration Workflow.

If you do not want to migrate data to these existing Huawei Cloud servers, skip the current step and go to Step 5: Create an Application Assessment.

Before associating an existing server on Huawei Cloud with a source server, make sure that the existing server meets the following requirements:

• Disks on the existing server can be formatted. During the migration, disks on the existing server will be formatted and re-partitioned based on the source disk settings for receiving data migrated from the source server.
• To migrate over the Internet, the existing server must be able to access the Internet.
• The existing server must be in the same region as the application that the source server is added to.

1. In the navigation pane on the left, choose Design > Migration Solutions.
2. Click View Resources in the Target Configuration card.
3. On the displayed Servers tab, locate a source server and click Associate in the Target Association column.
4. In the displayed dialog box, select the region of the application and select a project. Then, select an existing Huawei Cloud server and click Confirm.

   After the association is complete, Associated is displayed in the Target Association column. You can click Details to view the specifications of the associated target server.

Step 5: Create an Application Assessment

Assessing an application can get recommendations for most suitable Huawei Cloud resources based on the specifications, performance, and business purpose data of the source resources added to the application, as well as your selected recommendation references, such as, cost or performance reference and ECS type references.

If your source servers have been associated with existing servers on Huawei Cloud, you can skip this step and create a migration workflow to migrate them.

1. On the Migration Solutions page, click Assess in the Target Configuration card.
2. In the Select Application drop-down list, select the application that contains the source servers to be assessed.
3. In the Select Resources area, select the servers to be assessed.
4. Configure an assessment policy based on Table 2.

   Table 2 Settings used for computing target recommendations

   Parameter	Option	Description
   Target Region	-	Select the region where you want to purchase resources on Huawei Cloud. You are advised to select a region close to your target users for lower network latency and quick access.
   Assessment Policy	Match source configuration	MgC will recommend Huawei Cloud resources in the same or similar size as source resources. For details about how MgC recommends appropriate target resources for you, see How Does MgC Generate Target Recommendations?
   	Match business scenario	MgC recommends appropriate Huawei Cloud resources based on the business scenario of source resources and Huawei Cloud best practices. For details about how MgC recommends appropriate target resources for you, see How Does MgC Generate Target Recommendations?
   Priority	High performance	MgC recommends target resources with optimal performance.
   	Low cost	MgC recommends the most cost-effective target resources that meet your demands.
   Preferences	Server Types (Optional)	Select the server types you prefer.
   	Server Series (Optional)	Select the server series you prefer. The system will generate recommendations based on your preferred server types and series. NOTICE: If you select Display only series allowed on DeHs, Server Types will be dimmed, and the server series allowed on DeHs in the target region will be listed.
   	System Disk (Optional)	Select the system disk type you prefer.
   	Data Disk (Optional)	Select the data disk type you prefer.
   	Sizing Criteria	Select the criteria that the system will follow for generating server recommendations. For details about how MgC recommends appropriate target resources for you, see How Does MgC Generate Target Recommendations?

5. Click OK.
6. In the application list on the Migration Solutions page, locate the applications and click View Target Configurations in the Operation column.

   In the Target Configurations area, you can view the specifications of Huawei Cloud resources recommended based on the source resource specifications and your preferences. It also gives you the ability to estimate the cost of running on Huawei Cloud. In addition, you can modify the recommended target configurations.

Step 6: Create a Migration Workflow

Create a workflow to migrate the source servers to Huawei Cloud. For details, see Creating a Server Migration Workflow.