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Managing Objects

Updated at: Mar 25, 2021 GMT+08:00

MRS contains different types of basic objects as described in Table 1.

Table 1 MRS basic object overview

Object

Description

Example

Service

Function set that can complete specific business.

KrbServer service and LdapServer service

Service instance

Specific instance of a service, usually called service.

KrbServer service

Service role

Function entity that forms a complete service, usually called role.

KrbServer is composed of the KerberosAdmin role and KerberosServer role.

Role instance

Specific instance of a service role running on a host.

KerberosAdmin that is running on Host2 and KerberosServer that is running on Host3

Host

An ECS running Linux OS.

Host1 to Host5

Rack

Physical entity that contains multiple hosts connecting to the same switch.

Rack1 contains Host1 to Host5.

Cluster

Logical entity that consists of multiple hosts and provides various services.

Cluster names Cluster1 consists of five hosts (Host1 to Host5) and provides services such as KrbServer and LdapServer.

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