CentOS

Overview

Overview

About This Menu

  • This menu provides the Official Image Template of CentOS, which is compliant with Baremetal Server, Virtual Server.

Server / Dedicated Hypervisor Available with CentOS

  • When Customers utilize CentOS with Server / Dedicated Hypervisor, following two ways are available: 1. To utilize Official Image Template; 2. To bring their own OS image.

  • Following is how Customers utilize CentOS with Server / Dedicated Hypervisor respectively.

OS Use Case

Server/Dedicated Hypervisor

     
 

Baremetal Server

Virtual Server

vSphere ESXi Hyper-V

Official Image Template

Y Y N N

Customers BYOL (Private Image)

Y Y Y Y

Deployment Patterns

  • The deployment patterns of CentOS for each Server / Dedicated Hypervisor are as follows,

    <Deployment Patterns>

Server/Dedicated Hypervisor

Use

Host OS

Guest OS

Official Image Template

Customers BYOL

Deployment Patterns

Availability

Baremetal Server

Host OS

CentOS  
Y
         
Y
 

Guest OS

Optional Hyper Visor

CentOS  
N
         
Y

Virtual Server

Guest OS

Virtual Server Platform Environment

CentOS  
Y
         
Y
vSphere ESXi

Guest OS

vSphere ESXi CentOS  
N
         
Y
Hyper-V

Guest OS

Windows(Hyper-V) CentOS  
N
         
Y
構成提供パターンのイメージ図

Features

  • On-demand Customers can apply for CentOS templates on Baremetal server and Virtual server menu via ECL2.0 customer portal or API.

  • Free of Charge for Official Image Template
    Regardless of the server the customer uses, both initial and monthly charges are free.
    Baremetal server or Virtual server cost will be charged separately from OS template cost.

Available Functions

List of Functions

  • Following is the list of functions offered with CentOS Official Image Template:

Name of Functions

Overview

Initial Username Settings

The username of OS will be set default of this menu.

Password Settings for Default User

Initial Password is described in Initial Username and Password Settings section.

Locale Settings

Time Zone / Language / Character Code / Locale / Keyboard Sequence are set default.

Security Settings

The security settings(firewalld/SELinux) of OS will be set default of this menu.

SSH Settings

Parameters of sshd.conf are described in SSH Settings section.

Other Settings

OS Initial Status, Additional PKG, Repositories, Ipv6, NTP Server, DNS Server, and Default Gateways are respectively set.

※Server functions (OS installation and deletion, rebuild, duplication,etc) are described in the service description “Function list” of Virtual server / Baremetal server / Dedicated hypervisor menu.Please refer to the service descriptions.
*As for the functions offered by CentOS itself, please refer to the following website. https://www.centos.org/

Description of Functions

Initial Username Settings

  • NTT Com sets the following as initial user name and initial user’s authority.

Items

Server

 
 

Baremetal Server

Virtual Server

User Name

root root

Permissions

root root

Initial Username and Password Settings

  • Customers can set following passwords of Server to be created:

Items

Server

 

Menu

Baremetal Server

Virtual Server

Details

Customers can set optional values via Customer Portal / API.
If there is no entry, random value will be applied.
Initial login password is as follows:
root

Locale Settings

  • Time zone (UTC), locale, and keyboard layout are set as follows:

Items

Server

 
 

Baremetal Server

Virtual Server

Time Zone Settings

UTC

UTC

Locale Settings

en_US.UTF-8 en_US.UTF-8

Keyboard Layout Settings

English Key Layout (101/104)

English Key Layout (101/104)


Security Settings

  • firewalld and SELinux settings are set as follows:

Items

Server

 
 

Baremetal Server

Virtual Server

firewalld

N/A

N/A

SELinux disable disable

SSH Settings

  • The configuration of sshd conf are set as follows:

Items

Server

 
 

Baremetal Server

Virtual Server

Port 22 22

Protocol *

2 2
Password Authentication Y N
PubkeyAuthentication Y Y
Hostbased Authentication N N

Note

In CentOS 7.4 or later, if there is no change from the default setting of Protocol value, it is not displayed according to the OS specifications.

  • When Customers create Baremetal Server, they can create SSH key pairs, as well as they can utilize their existing ones. Maximum number of key pair per Tenent is 120.

  • Following is the methods for create/delete/register key pairs:

Items

Method

Create Key Pairs

Customer Portal /API
・Keyname (String)
・SSH public key generated by RSA or DSA.

Delete Key Pairs

Customer Portal /API
・Keyname (String)

Register Key Pairs

Customer Portal /API
・Keyname (String)

Other Settings

  • Following is the installation status and initial settings of OS:

Category

Item

Server

 
   

Baremetal Server

Virtual Server

Initial Status

OS

Minimal Installation

Minimal Installation

 

Additional PKG

・Common
acpid
Open SSH Server(meta group)
CentOS 7.3
Cloud-init 0.7.5
・ In the case of CentOS 7.5
Cloud-init 0.7.9
・In the case of CentOS 7.3/7.5/7.7
acpid
Open SSH Server(meta group)
Cloud-init 0.7.9
・In the case of CentOS 8.1
cloud-init-19.4

Initial Settings

Repository Server

Under “/etc/yum.repos.d/”

Under “/etc/yum.repos.d/”

  IPv6 Enable Enable
 

Default Gateway

The values described in Logical Network subnet resource will be set.
If left vacant, no value will be set.
The values described in Logical Network subnet resource will be set.
If left vacant, no value will be set.
  DNS
The values described in Logical Network subnet resource will be set.
If left vacant, no value will be set.
The values described in Logical Network subnet resource will be set.
If left vacant, no value will be set.
  NTP
The values described in Logical Network subnet resource will be set.
If left vacant, 169.254.127.1 will be automatically set.
Settings regarding slew mode is defined in chronyd.conf.
The values described in Logical Network subnet resource will be set.
If left vacant, 169.254.127.1 will be automatically set.
Settings regarding slew mode is defined in chronyd.conf.
  Linux EDAC (Error Detection And Correction) driver
After setting up a file in the following directory, it will be set to be unload.
etc/modprobe.d/blacklist-edac.conf


Official Image Template

Official Image Template

  • Following is the CentOS Official Image Template to be provided for Customers:

OS Version

Language

Server/Dedicated Hypervisor

     
   

Baremetal Server

Virtual Server

vSphere ESXi Hyper-V
CentOS 7.3-1611 EN Y N N N
CentOS 7.5-1804 EN Y Y N N
CentOS 7.7-1908 EN N Y N N
CentOS 8.1-1911 EN N Y N N

Subscription Method

  • New Subscription
    Customer needs to designate following Image Template when they create servers.

OS Version

Baremetal Server

Virtual Server

CentOS 7.3 CentOS-7.3-1611_64_baremetal-server_01 N/A
CentOS 7.5 CentOS-7.5-1804_64_baremetal-server_01 CentOS-7.5-1804_64_virtual-server_02
CentOS 7.7 N/A CentOS-7.7-1908_64_virtual-server_02
CentOS 8.1 N/A CentOS-8.1-1911_64_virtual-server_02

Terms and Conditions

Conditions for Usage with Other Menus

  • Customers are required to request for Subscriptions in combination with any of the two: Baremetal Server and / or Virtual Server.

  • In the event that Customers utilize NTP Server that is provided in this service, they will essentially be required to obtain the Common Function Gateway.
    If Customers would like to request such, they are suggested that they request for subscription.
  • In order for Customers to access to Repository they are required to separately subscribe Internet Connectivity Menu.


Minimum Contract Period

  • There is no minimum contract period.

Pricing

Initial Fee

  • This service does not require initial fee.

Monthly Fee

  • This service does not require initial fee.
    *However, the Customers’ concurrent Baremetal Server / Virtual Server Subscriptions separately require to be billed.

Quality of Service

Support Coverage

Supported Official Image Template

  • Support for the Official Image Template corresponds to the following Baremetal server and / or Virtual Server that is created by Official Image Template:

OS Version

Baremetal Server

Virtual Server

CentOS 7.1 CentOS-7.1-1503_64_baremetal-server_01 CentOS-7.1-1503_64_virtual-server_12
CentOS 7.3 CentOS-7.3-1611_64_baremetal-server_01 CentOS-7.3-1611_64_virtual-server_02
CentOS 7.5 CentOS-7.5-1804_64_baremetal-server_01 CentOS-7.5-1804_64_virtual-server_02
CentOS 7.7 N/A CentOS-7.7-1908_64_virtual-server_02
CentOS 8.1 N/A CentOS-8.1-1911_64_virtual-server_02

Support Method

  • Please refer to OS Service Description as for the support coverage of Official Image Template including free OS such as CentOS.

Quality of Operation

Monitoring Coverage

  • The monitoring of this menu is based on the standardized SLA for Enterprise Cloud 2.0.

SLA

  • The SLA of this menu is based on the standardized SLA for Enterprise Cloud 2.0

Data Center Providing This Menu

  • Available data centers are as follows. (As of October 2020)

Region

Server/Dedicated Hypervisor

 
 

Baremetal Server

Virtual Server

JP1

Y

Y

JP2

Y

Y

JP4

Y

Y

JP5

Y

Y

JP6

Y

Y

US1

Y

Y

UK1

Y

Y

DE1

Y

Y

FR1

Y

Y

SG1

Y

Y

HK1

Y

Y

Restrictions

All

  • In order for Customers to access to Repository they are required to separately subscribe Internet Connectivity Menu.

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