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FusionAccess V100R006C20 Cloud Classroom Solution Product Documentation 10 (Single-Classroom Scenarios)

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Rectifying Faults

Rectifying Faults

Rectifying FusionAccess Faults

Scenario

This section describes how to restore FusionAccess rapidly using backup data when a FusionAccess management VM is faulty or other exceptions occur.

Prerequisites

You have obtained the account and password for logging in to FusionCompute.

Procedure

Restoring a FusionAccess management VM

  1. Log in to FusionCompute.
  2. On FusionCompute, choose in the navigation tree on the left. The Resource Pools page is displayed.
  3. On the VM tab page, enter search criteria and search for the faulty VM.
  4. Click the VM to go to the VM summary page.
  5. Click Snapshot to select the snapshot used to restore the VM.
  6. Click Restore VM and click OK on the displayed page to submit the VM restoration task, as shown in Figure 2-57.

    Figure 2-57 Restoring a VM

  7. After the VM is restored, log in to the FusionAccess management portal to check the environment.

    If a teacher's VM is faulty, the VM can be restored from a snapshot. If a student's VM is faulty, provisioning a new student's VM is recommended. For details, see Provisioning Student's VMs.

Restoring a teacher's VM

  1. Log in to FusionCompute.
  2. On FusionCompute, choose in the navigation tree on the left. The Resource Pools page is displayed.
  3. On the VM tab page, enter search criteria and search for the faulty VM.
  4. Click the VM to go to the VM summary page.
  5. Click Snapshot to select the snapshot used to restore the VM.
  6. Click Resume VM. In the confirmation dialog box that is displayed, click Confirm.
  7. After the restoration is complete, log in to the VM.

Restoring a student's VM

  1. Shut down the VM. The system restores the VM by default.

VM Blue Screen

Scenarios

Mount an ISO CD-ROM drive to a virtual machine (VM) and restore the VM operating system (OS) when a blue screen of death (BSOD) or blank screen is displayed on the VM.

Impact on the System

This operation has no adverse impact on the system.

Workflow

Figure 2-58 shows the process for rectifying this fault.

Figure 2-58 Process for rectifying this fault
Procedure
  1. Check whether the faulty VM is newly created.

  2. Delete the VM and create a new one.

    No further action is required.

Query the node where the faulty VM is located.

  1. Log in to FusionCompute using the administrator account.
  2. Choose

    The Resource Pools page is displayed.

  3. Click the VM tab.
  4. Select ID from the drop-down list and enter the ID of the faulty VM in the search box.
  5. Click .

    The search result is displayed.

  6. Click the name of the faulty VM.

    The information about the VM is displayed.

  7. Click the name of the host where the faulty VM locates.
  8. On the Summary tab page, view the value of Host IP Address for this CNA. (Host IP Address indicates the management IP address of this CNA.)

Mount an ISO CD-ROM drive to the faulty VM.

  1. Share the folder for storing the ISO image file on the local PC with the local administrator named administrator.

    To share the folder in Windows 7, do as follows:

    Right-click the ISO image file, and choose Share with > Specific people from the shortcut menu. Then enter administrator in the text box, and click Share.

  2. In the FusionCompute, choose .
  3. Click the VM tab.
  4. Select ID from the drop-down list and enter the ID of the faulty VM in the search box.
  5. Click .

    The search result is displayed.

  6. In the row of the faulty VM, click the VM name.
  7. On the Configuration tab, choose Hardware > Floppy Drive.
  8. Set Attach ModeFloppy Drive File to Automatically Match and click Connect.

    NOTE:

    If automatic matching is not supported, manually select one and only the corresponding .vdf file can be selected.

  9. Choose Hardware > CD/DVD-ROM Drive.
  10. Select Mount Local CD/DVD-ROM Drive.
  11. Click Confirm.

    A new dialog box is displayed.

    NOTE:

    Do not close the window during the mounting process. Otherwise, the ISO file or CD–ROM drive will be automatically unmounted.

  12. In the dialog box that is displayed, set the parameter as follows:

    File: The value is in the format of \\IP address of the local PC\Name of the shared folder\Name of the image file. For example, \\192.168.5.5\V100R002C02B011\FusionCube_V100R001C00_CNA.iso.

  13. Select Restart the VM now to install the OS, and click Confirm twice.
Restore the VM OS automatically.
NOTE:

The procedure in Windows 7 is used as an example to describe how to restore the faulty VM by mounting a CD-ROM drive or an ISO file.

  1. After the ISO CD-ROM drive is successfully mounted to the VM, click Log In Using VNC on the displayed page to log in to the faulty VM.

    NOTE:

    After restarting the VM, you need to log in to the VM by using Virtual Network Computing (VNC) immediately and press any key to start the VM from the CD-ROM drive.

  2. Press any key to start the VM from the CD-ROM drive when the following information is displayed:

    Press any key to boot from CD.

  3. Press Enter.

    The installation program screen is displayed.

  4. Enter R.

    The restoration starts.

  1. Follow the instructions on the screen to complete the installation by using the default configurations.

Configure the VM to start from the hard disk first.

  1. Use PuTTY to log in to the CNA where the faulty VM is located.

    Log in to the CNA as user root using the management IP address obtained in Step 10.

  2. Run the following command to configure the VM to start from the hard disk first:

    /opt/galax/NCclient ncModifyBoot VM ID harddisk

    If the following information is displayed, the configuration is successful:

    ncModifyBoot() ok.

  3. In the FusionCompute, click Operation for the faulty VM, and select Unmount CD-ROM.

Check the VM status.

  1. Log in to the VM again.
  2. Check whether the fault is rectified.

    • If yes, no further action is required.
    • If no, go to Step 34.

Restore the system disk of the faulty VM.

  1. In the FusionCompute, , click , and select the VM tab.
  2. Click More > Power > Forcibly Stop in the Operation column from the row where the faulty VM locates.
  3. Click Confirm.
  4. Click the name of the faulty VM, and click Disk on the Configuration tab.
  5. Locate the row that contains the system disk (for example, disk 1) of the faulty VM, click Unattach.

    Detach disk 1 from the faulty VM as prompted.

  6. Click and select the VM tab.
  7. Click the VM (for example, VM B) to which the disk is attached.
  8. Click Disk on the Configuration tab
  9. Click Attach Disk.
  10. Set Bus Type, Disk I/O Mode, and Slot ID as needed, and select the unlocked disk 1 in Step 38.
  11. Click Confirm.

    Attach disk 1 to VM B as prompted.

  12. Log in to VM B using VNC.
  13. Right-click My Computer, and choose Manage from the shortcut menu.

    The Server Manager window is displayed.

  14. Choose Storage > Disk Management.
  15. Right-click disk 1, and choose Change Drive Letter and Paths from the shortcut menu.

    The Change Drive Letter and Paths dialog box is displayed.

  16. Click Change, and set a drive letter, for example, E.
  17. Click OK.

    A confirmation dialog box is displayed.

  18. Click OK.

    The Computer Management page is displayed.

    The data on drive E: is the data on disk 1.

  19. Restore system files on drive E, and back up user data.
  20. Repeat Step 34 to Step 44 to attach disk 1 to the faulty VM as the system disk again.
  21. Log in to the faulty VM using VNC.
  22. Check whether the fault is rectified.

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Updated: 2019-04-25

Document ID: EDOC1100010651

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