FAQ(ECL2.0)
Virtual Server - FAQ
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I want to use one virtual NIC to set two or more IP addresses (a primary IP, a secondary IP, and so forth). Can I do this?ECL2.0, Logical Network, Virtual Server
You may be able to assign two or more IP addresses to one NIC on a virtual server if you use a fixed IP address (fixed IP) on a logical network to set two or more IP addresses to one port and set the added IP addresses on the OS. We are sorry for your inconvenience, but this function is not supported on virtual servers. The customers can implement it on their own responsibility.
Note that you can add the registrations of IP addresses as fixed IP addresses (fixed IP) but you cannot delete a specific IP address you have added. Be careful because you need to delete the port if you want to delete registered IP addresses.
*As shown in the service description about the restriction, one IP address should be assigned to one NIC in principle. -
Do I get a notification email if the HA switching occurs to the virtual server?Common, ECL2.0, Virtual Server
Yes. We send you a notification email.
We have posted the FAQ regarding the checkpoints in the notification emails you may receive when the HA occurs. Please see them.Q. I have received a notification email, which says the HA occurs. What should I check?
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Can I keep using my own OS licenses that are not supported in the service?ECL2.0, OS, Virtual Server
For the usability and the terms and conditions in a shared Cloud environment, consult with the provider of your licenses. If you want to keep using your OS license to use the license switch function, make sure to use the license switch function to keep using your OS license.
If yours is one of the specified file formats, you can keep using the file by way of an image storage area in the virtual server menu. However, we cannot guarantee its normal behavior.
In addition, we may prohibit you from using the service and/or may delete a file or files if you make some unauthorized use of an OS license and/or if your application form contains any false statement in relation to the license type you keep using with the license switch function. -
On the Windows server created from the official image template, the expiration date of Volume Activation Authentication is displayed. Does it need updating and other work on Customer's side?Baremetal Server, ECL2.0, OS, Virtual Server
No. Work on the customer side is unnecessary.
When connected to the common function gateway and communicating with the authentication server, the authentication is updated regularly.Tutorials - Virtual Server - Activate your OS License
Tutorials - Baremetal Server - Activate your OS License -
Is it possible to prevent it from being activated when creating a virtual server(instance)?ECL2.0, Virtual Server
No. You can not create an instance in a stopped state.
When you create a virtual server, the instance will auto start.
Therefore, if you want to create an instance in a stopped state, you will create an instance and stop it after being started.Reference:
Service Descriptions - Virtual Server - Operable Attributes of Instance -
When HA function of the virtual server instance is enabled, can I get an email notification of HA switching?ECL2.0, Firewall (Brocade 5600 vRouter), Load Balancer, Network-based Security, Virtual Server
Yes.
When HA switching occurs on the hypervisor that accommodates the virtual server, the customer is notified by e-mail, in which the target virtual server is described.
The destination of the notification e-mail includes the e-mail address of the registered administrative user and the e-mail address of the general user who can access to the tenant concerned. -
Unable to operate the keyboard at the console.ECL2.0, Virtual Server
There are cases where locking is applied by entering "Ctrl + S key", key input is invalid.
If key input is invalid, you can cancel by entering "Ctrl + Q key", please try once. -
What actions NTT Com took for CPU vulnerability(CVE-2017-5715 and CVE-2017-5753(Spectre) ) ?ECL2.0, Virtual Server
NTT Com mitigates CPU vulnerability of hypervisor hosts for VMs in infrastructure level. Any impact on performance is not expected by this change. However, regarding patches for CPU vulnerability on Guest OS, Retpoline expects less performance impact than IBRS which restrict indirect branch prediction.
[2020/11/12 Updated]
- Service infrastructure (host OS) support (NTT Com implementation)
It has been confirmed that there is almost no performance impact on Unixbench due to vulnerability countermeasures on the service infrastructure side under the following verification conditions. We have confirmed that the performance has improved in terms of throughput. However, the degree of impact depends on the customer's system environment.
- Retpoline
Kernel of Red Hat Enterprise Linux 7.3 is kernel-3.10.0-514.44.1.el7.x86_64 or later. (https://access.redhat.com/errata/RHSA-2018:0399)
- IBRS
It can be effective when customer’s instance with kernel updated is stopped and launched after complete mitigation in infrastructure level.
<Remark for Unixbench Tests result>
- Each case is the following condition;
- Case-A
No patch applied on guest OS before platform version upgrade
- Case-B
Retpoline patch applied on guest OS before platform version upgrade
- Case-C
No patch applied on guest OS after platform version upgrade
- Case-D
Retpoline patch applied on guest OS after platform version upgrade
- This result is to test Unixbech on VM with default setting which created from Red Hat Enterprise Linux official image.
- All results of the above performance test shall not be guaranteed performance.
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How to check whether the virtual server (RHEL) license activation is done or not?ECL2.0, OS, Virtual Server
Regarding the authentication method of the virtual server (RHEL) created from the official image template in Enterprise Cloud 2.0, Red Hat Update Infrastructure (RHUI) is adopted instead of the license authentication method using subscription (RHN).
Therefore, there is no problem even if valid subscriptions are not displayed or registered in the execution results such as [subscription - manager list - available].
In addition, it is not necessary for customers to register their subscriptions.If you are connected to a common function gateway and you can connect to the Internet, yum and license authentication can be executed.
Regarding verification of license authentication, if [yum repolist all] command etc. can be executed normally, it can be confirmed that license authentication is completed.
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Will instances be rebooted when I change the flavor with the instance on?ECL2.0, Virtual Server
Yes. Rebooting instance is executed during the flavor change process. Please save the data before changing the flavor.
Reference:
Tutorial- Modify the Instance Flavor (“Resize Instance”) - Procedure