Cluster node

A Cluster node represents a group of hosts collaborating to form a cluster. The Cluster node represents the group rather than a single physical entity. They are also used represent mainframe sysplexes. Cluster nodes are under the full control of patterns.

For detailed information about patterns, see the The Pattern Language TPL and Configipedia.

Cluster node lifecycle

The following section describes the scenarios in which a Cluster node is created, updated, or removed.

Creation

The creation of a Cluster node is under the full control of patterns. Clusters are created when they are detected on a host by a pattern which is searching for them. The pattern contains the conditions which enable it to detect a cluster. Once found, the pattern creates the Cluster that it needs. A relationship link is automatically created to the Host node and the Cluster will have a key generated.

The generated key for a Cluster node is entirely dependent on the kind of Cluster.

Update

The update procedure for a Cluster node is also under full control of patterns. When the pattern has identified a cluster, it calculates a key. If a Cluster node with that key already exists, it is updated accordingly.

Removal

A Cluster node can be destroyed either manually or automatically. Cluster nodes are automatically removed when the last remaining Host node or MFPart is unlinked. In some cases, particular patterns might not create a cluster until hosts are detected. In these cases, the pattern will remove the Cluster node when there is only one host linked to it. For vCenter cluster nodes, cluster nodes are removed when a VMware cluster no longer exists.

To manually remove a Cluster node, find the necessary Cluster, select it in the list and pick Destroy from the Actions list. Aging of Clusters node are controlled by a Software Instance node. For more information about cluster aging, see Software Instance node.

This is a Cascade Removal type, see Cascade Removal.

Cluster node attributes

The attributes on a Cluster node as described in the following table:

UI Name
Attribute Name and Type

Description

Type
type string

Type of cluster.

Internal Identifier
id string

Internal Identifier of cluster.

Internal Name
cluster_name string

Internal Name of cluster

General Details

Key
key string

Globally unique key.

Name
name string

The primary name that the cluster is known by.

Short Name
short_name string

Short name.

Description
description string

Description of the cluster. Legacy attribute not currently used. Can be used by patterns if desired

URL
url string

URL for information about the cluster. Legacy attribute not currently used. Can be used by patterns if desired

Business Continuity Critical
business_continuity_critical boolean

If true, the cluster is critical to operation of the business. Legacy attribute not currently used. Can be used by patterns if desired

Supported by 3rd Party
third_party_support boolean

If true, the cluster is supported by a third party. Legacy attribute not currently used. Can be used by patterns if desired.

Synonyms
synonyms list:string

Other names by which this cluster is known. Legacy attribute not currently used. Can be used by patterns if desired.

Failover
failover boolean

Whether the cluster supports failover between members.

Cluster node relationships

The relationships on a Cluster node are as described in the following table:

UI name

Relationship

Description

Member Hosts

Cluster:
HostContainer:
HostContainment:
ContainedHost:
Host

Logical hosts that are part of this logical cluster.

Member MFParts

Cluster:
HostContainer:
HostContainment:
ContainedHost:
MFPart

MFParts that are part of this Sysplex.

Member Coupling Facilities

Cluster:
HostContainer:
HostContainment:
CouplingFacility:
CouplingFacility

Coupling Facilities that are part of this Sysplex.

Service Software

Cluster:
Service:
SoftwareService:
ServiceProvider:
SoftwareInstance

Software instances that provide this logical cluster.

Dependant Software

Cluster:
DependedUpon:
Dependency:
Dependant:
SoftwareInstance

Software instances that depend upon this logical cluster.

Maintaining Pattern

Cluster:
Element:
Maintainer:
Pattern:
Pattern

Pattern that is maintaining this cluster.

Managing Software

Cluster:
ManagedElement:
Management:
Manager:
SoftwareInstance

Software instances that is managing this cluster.

Running Software
cluster:
Host
:
HostedSoftware
:
RunningSoftware
:
SoftwareInstance
Software Instances running on this cluster
Members
Cluster:
Container:
Containment:
Contained:
ClusterMember
Members of this cluster
Managed Services
Cluster:
ServiceHost
:
HostedService
:
RunningService
:
ClusterService
Services managed by this cluster

Not displayed in UI

Cluster:
AttachmentContainer:
Attachment:
Attachment:
Attachment

A file attached to this element.

Status

Cluster:
ElementInCategory:
ElementCategory:
Category:
LifecycleStatus

The lifecycle status of this element.

Recovery Time

Cluster:
ElementInCategory:
ElementCategory:
Category:
RecoveryTime

The recovery time specified for this element.

Family

Cluster:
ElementInCategory:
ElementCategory:
Category:
Family

Family of this element.

Organizational Unit

Cluster:
OwnedItem:
Ownership:
Owner:
OrganisationalUnit

The Organizational Unit that this element belongs to.

Location

Cluster: ElementInLocation:
Location:
Location:
Location

Location of this element.

Support Manager

Cluster:
OwnedItem:
Ownership:
SupportOwner:
Person

The person responsible for the support of this element.

Business Owner

Cluster:
OwnedItem:
Ownership:
BusinessOwner:
Person

The person responsible for this element from a business perspective.

IT Owner

Cluster:
OwnedItem:
Ownership:
ITOwner:
Person

The person responsible for this element from an IT perspective.

Running Software

Cluster:
Host:
HostedSoftware:
RunningSoftware:
SoftwareInstance

Software Instances running on this cluster.

Members

Cluster:
Container:
Containment:
Contained:
ClusterMember

Members of this cluster.

Managed Services

Cluster:
ServiceHost:
HostedService:
RunningService:
ClusterService

Services managed by this cluster.

Service Software Cluster

Cluster:
Service:
SoftwareService:
ServiceProvider:
SoftwareCluster

Software Clusters that provide this logical cluster.

Dependant Software Clusters

Cluster:
DependedUpon:
Dependency:
Dependant:
SoftwareCluster

Software Clusters that depend upon this logical cluster.

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