Virtual Server - Documents

• Service introduction
• Support information

Known Issues

• The volume can not be operated when the instance is deleted while the volume is attached
• The volume created by server API with “source_type:blank” property in “block_device_mapping_v2” does not work properly
• CPU model recognition error
• Instance which guest OS is Windows Server hangs when detaching an interface while the instance is online.　
• About the issue which the DHCP server of the logical network announces an unintended cache (resolver) DNS server address

FAQ

• I can’t move the mouse pointer (mouse cursor) on the console screen accessed via the Cloud Computing Control Panel. (Mouse cursor is stuck on screen, and won’t move.)ECL2.0, Virtual Server / Operation

  If you can’t move the mouse pointer on the console screen, please try the following countermeasures.

  (1) “Changing the browser” or “Changing the client PC”
  You may be able to move the mouse pointer (mouse cursor).

  (2) Restart the virtual server.
  If there is no change after trying (1), please restart the virtual server via the Cloud Computing Control Panel at your discretion.

  Enterprise Cloud 2.0 has adopted Openstack as the cloud platform and the mechanism of the console connection to the virtual server also follows the mechanism of Openstack.
  Compared to the physical serial console connection, the console connection of the Openstack is less stable.

  Therefore, we strongly recommend the customer to enable the remote connection such as SSH or RDP connection as an alternative of the console connection to access to the virtual server resources.

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• When I tried to create a volume, “Error writing field to database (HTTP 400)” was shown and I could not create the volume.ECL2.0, Virtual Server / Specification
  As specification, if “Emoji” or “variant characters” are entered in the description field when you create a volume, it will result in the following error “Error writing field to database (HTTP 400)” .

  Please retry to create a volume without using “Emoji” or “variant characters” in the description field.

  “Variant characters” are the old characters that have the same pronunciation and meaning but different form and shape.

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• Is the redundant method available that uses the same IP address with different MAC addresses including the Windows Server Failover Cluster?ECL2.0, OS, Virtual Server / Specification

  We have confirmed that Windows Server Failover Cluster works under our verification environment.

  As of July 2019, we have confirmed the operation with the next version.
  – Windows Server 2012 R2​
  – Windows Server 2016​

  * Since the DAD function is disabled in the official image template of the virtual server, please follow the procedure below when using a failover cluster with a virtual server.

  1. Input “regedt32” in search box on Start menu and enter.
  2. Click “HKEYLOCAL MACHINE” in Registry Editor.
  3. Click “System” -> “CurrentControlSet” -> “Services” -> “TcpIp” -> “Parameters”.
  4. Right click “Parameters” and click “New” -> “DWORD(32-bit)Value”.
  5. Delete “New Value #1”, right click “ArpRetryCount” and click “Delete”.
  6. Reboot the virtual server.

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• How to collect data, generate graphs and report for virtual server memory usage by using Monitoring menu?ECL2.0, Monitoring, Virtual Server / Operation, Specification

  For virtual server memory usage (and others that are not included in the meters provided as standard in Monitoring menu), you can use Monitoring function (graph display, alert setting, etc.) by using Custom Meter.

  There are two methods to use Custom Meter. You can choose either or both of them according to your environment.

  1. Use a custom meter agent
  (Note: Windows OS is not included in the target operating system)

  2. Create and use a script (for collecting data and sending it to the monitoring server)
  (Note: The script needs to be prepared by customers)

  Please refer to the tutorial below for detailed procedure on each method.
  Service Descriptions – Monitoring – Custom Meter
  Tutorials – Monitoring – Use Custom Meter

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• Is the SID (Security Identifier) of Windows Server changed by snapshot duplication or system restore of the backup menu?Backup, ECL2.0, OS, Virtual Server / Specification

  No. In any cases, in principle, the SID of Windows Server is not changed.
  However, if you added Sysprep on Windows Server in advance, SID might be changed.

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• Is it possible to use Windows Server from private ISO on Virtual Server?ECL2.0, OS, Virtual Server / Specification

  No. You are not allowed to use Windows Server from private ISO on virtual server.
  When using Windows Server in the multi-tenant environment (the environment that multiple users share one physical server), the license needs to be provided with SPLA (Services Provider License Agreement).

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• Is it possible to suspend the process of creating a snapshot of virtual server?ECL2.0, Virtual Server / Specification

  For creating snapshots, there is no way to suspend the process or to check the status on the way.
  The snapshot changes to the error state when it becomes abnormal.
  Regarding the creation of the snapshot, it may take time to process even if it is normal processing.

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• Is it possible to remove image which was created with protection turned “on”?ECL2.0, Virtual Server / Specification

  For images created by turned on protection in the GUI, it is necessary to remove the protection once before removing.
  

  For steps to remove protection, refer to the following API references,
  and modify setting to “protected:false”.

  API references – Update image

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• License activation fails on the virtual server created from Windows Server Official Image Template.ECL2.0, OS, Virtual Server / Operation, Specification

  There is a possibility that connectivity to the license server provided by NTT Com may not be established.
  Follow the steps below to ensure connectivity to the license server.

  Tutorial – Activate your OS License

  Reference：Service Descriptions – Windows Server – Conditions for Usage with Other Services

  In order to implement OS license authentication, a common function gateway is required.When using Windows Server, please make sure to apply common function gateway.
  Also, if the common function gateway is removed, OS license authentication will be lost. Therefore, please be careful not to remove the common function gateway from the Windows Server that you are using.

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• It is not possible to detach root volume from instance.ECL2.0, Virtual Server / Operation, Specification

  Root volume is not able to detach unlike data volume. Root volume continue to be root volume for appropriate instance unless deleting instance.
  Reference：Service Descriptions – Glossaries of Volume

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