CentOS¶

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	Availability
Baremetal Server	Host OS	CentOS	ー	●		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

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 7.9 / 8.1 / 8.2 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.	Assigned values for Logical Network will be set. (NOTE:1) 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.	Assigned values for Logical Network will be set. (NOTE:1) 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	ー

NOTE1: In case of DHCP=false, this column is null. Customer need to configure after creation.

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 7.9-2009	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 7.9	N/A	CentOS-7.9-2009_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 7.9	N/A	CentOS-7.9-2009_64_virtual-server_02
CentOS 8.1	N/A	CentOS-8.1-1911_64_virtual-server_02
CentOS 8.2	N/A	CentOS-8.2-2004_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 November 2021)

Region	Server/Dedicated Hypervisor
	Baremetal Server	Virtual Server
JP1	Y	Y
JP2	Y	Y
JP4	Y	Y
JP5	Y	Y
JP6	Y	Y

Restrictions¶

All¶

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

OS

RHEL: Red Hat Enterprise Linux