5-2 Add and Delete Group
Resource group refers to the group of resource that failover when a failure occurs.
MCCS is executes failover between nodes in group unit.
Therefore, resource should be created in groups to be failover.
Also, more than one group can be created in one cluster.
Table of Contents
When click ESC key while creating group, group creation process is cancelled.
Therefore, please note not to press ESC key when proceed with group creation wizard.
Adding Resource Group
- To add a group, select 'group name → right click → Add Group' from configuration tree.
Or select 'Edit(E) → Add Group' from main menu.
[Figure] Adding a Group If you select to register a group, you will see the initial group registration screen.
In the initial group registration screen, enter a group name and move the operation target node from the left window to the right window.If you select only one operation target node, then you can create a single node group.
If you select this option, a group is not able to perform failover in case of trouble.(If you have selected a single node cluster in the installation program, only one node will be displayed as an available node.)
[Figure] Operation Target Node SelectionUnlike failover group, Single node group does not support failover when failure occurs.
Press the 'Additional Setting' button to decide whether to set the group policy to failover or parallel operation.
If you have added more than one node to the operation target node, additional setting will be activated.
[Figure] Additional Settings ViewFailover group failover from active to standby node when failure occurs.
Parallel group is configured with the resources that can be executed on more than 2 nodes at the same time. Parallel group does not support failover, but restart the service when it is failed in local node.Designate a group policy and configure an application.
For more on how to add each resource, refer to the below link.
Refer to the descriptions of adding complex applications in "7.4 Complex Application Resource."
Refer to the description of adding basic application in "7.3 Basic Application Resource."
Refer to the descriptions of adding service resource in "7.7 Service Resource."If there is something wrong with the resource added, you can press the X mark to delete it.
You can change the starting/terminating order of added resources by pressing the arrow icon.
[Figure] Application Configuration- Configure the network related resource.
For more on how to add each resource, refer to the below link.
Refer to the descriptions of adding network card in “7.1 Network Card Resource."
Refer to the descriptions of adding a network address in "7.2 Network Address Resource."Before you can use the IP resource, you must define the network adaptor resource.
[Figure] Network Configuration - Configure the disk related resource.
For more on how to add each resource, refer to the below link.
Refer to the descriptions of adding shared disk resources in "7.5 Shared Disk Resource."
Refer to the descriptions of adding SCSI reservation resource in "7.9 SCSI Reservation Resource."
Refer to the descriptions of adding mirror disks in " 7.6 Mirror Disk Resource ."
[Figure] Disk Configuration
- Once you have configured all the resources, it will suggest a dependency recommended by MCCS.
If you want to change the dependency, select the Dependency tool in the right tab and change it.
[Figure] Recommended Dependency Modified
- After creating dependency, detailed information of group configuration can be shown as below.
[Figure] Group Detailed Information View
Deleting
To delete a group, first make sure that there are existing online resources in a group.
If there is an existing resource online, terminate or delete it.
- To delete group, select Select Group - Right Click - Delete Group.
If one or more than one of the resources is online state, a message shown below will appear. - When this happens, offline the group first before deleting it.
[Figure] Warning Message of Deleting Group
If the mirror disk is included in the group, a message asking if replication program of mirror disk will be deleted as well.
if you click "OK" button, replication program is deleted as well. Press "Cancel" button if you do not wish to delete replication program.
[Figure] Deleting Mirror Disk View