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Troubleshooting

Last Updated: Jul 19, 2018

After you fix the error, run go2aliyun_client of the Cloud Migration Tool again. The migration resumes from where it was suspended.

After the migration job is finished for an on-premises server running Windows Server 2008 and later version of Windows Server, you must download and run the Reset File Permission tool at the first instance startup attempt. The Reset File Permission rectifies the default access permission of the file system to avoid abnormal service and component crashes.

Keyword “IllegalTimestamp” appears in the migration logs.

Check whether the system time is correct or not.

Keyword “check rsync failed” appears in the migration logs.

Check whether the rsync component is installed or not.

Keyword “check virtio failed” appears in the migration logs.

Check whether the virtio driver is installed or not.

Keyword “check selinux failed” appears in the migration logs.

Check whether SElinux is deactivated or not.

You can temporarily deactivate SELinux by running setenforce 0.

Keyword “Do Grub Failed” appears in the migration logs of a Linux server.

Check whether the on-premises server has correctly installed the GRUB (GRand Unified Bootloader) or not. You can install a GRUB with the version newer than 1.9 and try again.

Keyword “UnknownError” appears in the migration logs.

Check whether the value of the platform parameter is correct in file user_config.json or not.

Keyword “OperationDenied” appears in the migration logs.

If rsync: send_files failed to open "…": Permission denied (13) is displayed in the log, Alibaba Cloud Migration Tool has no access permission on the directory or folder, which leads to rsync failure. You can configure rsync_excludes_linux.txt or Rsync/etc/rsync_excludes_win.txt to filter out the specified directory or folder and try again.

Keyword “InvalidAccountStatus.NotEnoughBalance” appears in the migration logs.

The default billing method of the intermediate instance is Pay-As-You-Go, you must make sure that no credit limit is set to your credit card and it allows the payment to go through.

Keyword “Forbidden.RAM” appears in the migration logs.

If the AccessKey that you create belongs to a RAM user, you must make sure that the specified RAM user is authorized the permission of AliyunECSFullAccess and AliyunVPCFullAccess to operate the ECS and VPC resources. For more information, see RAM document Authorization policies.

Keyword “InvalidImageName.Duplicated” appears in the migration logs.

The specified parameter image_name cannot be the same as an existing image name.

Keyword “Connect to Server Failed” appears in the migration logs.

It indicates that the tool is unable to connect the intermediate instance. You can:

  1. View the migration log for any migration exception.

  2. Before you proceed, check the following:

    • Whether the status of the intermediate instance is abnormal or not in the ECS console.

    • Whether the network service of the on-premises server is abnormal or not.

    • The TCP port 80, 443, 8703, and 8080 have been enabled because the Cloud Migration Tool needs the access permission of those ports.

  3. After the error is fixed, run the go2aliyun_client again.

Keyword “Do Rsync Disk x Failed” appears in the migration logs.

It indicates that the data transmission is interrupted. You can:

  1. View the migration log for any migration exception. Specifically, if the return: 3072 or return: 7680 is displayed in the log file, you must make sure the database or container service in the on-premises server has been disabled, such as Oracle, MySQL, MS SQL Server, MongoDB, and Docker. In that case, you can disable the service or filter out the related directory before you start the migration again.

  2. Before you proceed, check the following:

    • Whether the status of the intermediate instance is abnormal or not in the ECS console.

    • Whether the network service of the on-premises server is abnormal or not.

    • The TCP port 80, 443, 8703, and 8080 have been enabled because the Cloud Migration Tool needs the access permission of those ports.

  3. After the error is fixed, run the go2aliyun_client again.

Why no data is found in the original data disk directory in the started Linux ECS instances?

After you migrate an on-premises Linux server, the data disks are not mounted by default. You can run the command ls /dev/vd* to view the data disk devices. You may mount the data disks manually as needed, and edit configuration file /etc/fstab to configure the mounting file systems. For more information, see Linux _ Format and mount a data disk.

What can I do if the drive letters of data disks are missing or wrong after the Windows server migration?

  • If the drive letters are missing, you can add the drive letters in the Disk Management. For more information, see Windows_Format a data disk.

  • If the drive letters are wrong, you can replace the drive letters in the Disk Management. For more information, see Windows_Format a data disk.

What can I do if network service is abnormal when I start the migrated Others Linux instances?

When an image of Others Linux type is imported, Alibaba Cloud performs no configuration, including network configuration and SSH configuration, on ECS instances created by custom images. You can manually modify the network service configurations.

Note: After the migration job is finished, we provide the created instance a single virtual network interface that uses DHCP to assign addresses.

If network configuration still fails, open a ticket.

Why cannot I start the created ECS instances after Linux server migration?

  1. Check the driver. Before creating the I/O optimized instances, make sure that the virtio driver is installed on the on-premises server.

  2. Check whether the boot configurations of the on-premises server are normal.

  3. Connect to the ECS instance by using the Management Terminal in the ECS console, if the following output appears:

    Faq

    Perhaps the kernel of your on-premises Linux servers is the earlier version, and the version of GRUB (GRand Unified Bootloader) is earlier than 1.9. You may update the boot loader GRUB to a version later than 1.9.

If the problem persists, scan the following QR code to join the dedicated DingTalk Migration Tool group chat to contact Alibaba Cloud.

QR code of DingTalk Migration Tool group chat

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