Moab Web Services > References > Resource Reference > Fields: Nodes

Fields: Nodes

See the associated Nodes resource section for more information on how to use this resource and supported operations.

Additional references

Type	Value	Additional information
Permissions resource	nodes	Permissions
Hooks filename	nodes.groovy	Pre- and Post-Processing Hooks
Tenant-supported	Yes	Tenants
Distinct query-supported	Yes	Distinct

API version 3

Node

This class represents a node in the Moab Workload Manager. Moab recognizes a node as a collection of resources with a particular set of associated attributes. This definition is similar to the traditional notion of a node found in a Linux cluster or supercomputer wherein a node is defined as one or more CPUs, associated memory, and possibly other compute resources such as local disk, swap, network adapters, and software licenses. Additionally, this node is described by various attributes such as an architecture type or operating system. Nodes range in size from small uniprocessor PCs to large symmetric multiprocessing (SMP) systems where a single node may consist of hundreds of CPUs and massive amounts of memory.

Field Name	Type	PUT	Description
id	String	No	The unique identifier of this node. Note: this field is not user-assigned and is generated by the database.
aclRules	Set<NodeAclRule>	No	The set of access control rules associated with this node.
architecture	String	No	This node's processor architecture.
attributes	Map<String, Map>	No	Attributes is a map of attribute names to tuples (maps) that describe the scheduling attributes of a node. Each tuple should contain the following entries: value - the attribute value displayValue - the attribute display value
classes	Set<String>	No	The classes that this node can be scheduled for.
featuresCustom	Set<String>	Yes	The features this node advertises which are customizable at run-time. This can be used to define node sets. (See also: featuresReported.)
featuresReported	Set<String>	No	The features this node advertises which are reported by resource managers or are present in the Moab Workload Manager configuration. This can be used to define node sets. (See also: featuresCustom.)
index	Integer	No	The index for this node as reported by the resource manager.
ipAddress	String	No	This node's IPv4 address.
isHypervisor	Boolean	No	True if the node is a hypervisor, false otherwise. This is based on the NodeOperatingSystemInformation.hypervisorType field. If hypervisorType is present, the node is a hypervisor. If it is null, then it is not a hypervisor.
jobs	Set<DomainProxy>	No	Jobs associated with this node.
lastUpdatedDate	Date	No	The timestamp of the last moment when this node was updated. There is no guarantee that all user modifications to a node would be picked up. This will also be changed every RMPOLLINTERVAL even if a resource manager does not report information on this node.
messages	Set<Message>	Yes	The list of messages attached to this node. They can be attached by admins, the resource manager layer, or triggers.
metrics	Map<String, Double>	Yes	Metrics are the measurable, quantitative, and changing aspects of this node. They are used to define workload placement, attach triggers, etc. There are some built-in metrics: speed - A number from 0.0 to 1.0 describing the relative speed of the system for computational tasks. This is a composite metric, and is defined on a per-site basis. cpuLoad - This is the CPU load on this node. This value is defined at the resource manager layer, but is generally defined on a per-operating system basis. For example, Unix-based OS's use some aspect of the Unix load average, as reported by the resource manager layer, while Windows-based OS's use CPU utilization.
migrationDisabled	Boolean	No	True if VM migration is disabled on this node.
name	String	No	The name of this node. This name is unique per instance of Moab Workload Manager (i.e. not globally).
operatingSystem	NodeOperatingSystemInformation	Yes	Describes the current or expected operating system image information for this node. The operatingSystem.image field can be changed using PUT.
partition	String	Yes	The partition this node belongs to.
processorSpeed	Integer	No	The speed, in MHz, or the processors on this node.
profilingEnabled	Boolean	No	Indicates whether historical data gathering and reporting is enabled for this node. This is also controlled by the same setting on the default node (i.e. all nodes). If set to false (default), node statistics are not gathered.
rack	Integer	No	The rack where this node is located in the datacenter/cluster.
requestId	String	No	An ID that can be used to track the request that created the node.
reservations	Set<DomainProxy>	No	Reservations associated with this node.
resourceManagerMessages	Map<String, Map>	No	The resource manager messages for this node. Each key is the name of a resource manager, and the value is the message that the resource manager has posted onto the node.
resourceManagers	Set<NodeResourceManager>	No	The resource managers that are reporting or have previously reported this node. Each object also contains information on the resource manager reports.
resources	Map<String, Resource>	No	Contains references of a string representing a resource name to a resource object detailing the amount of the resource that is available, configured, etc. Each key is the name of the resource, which equates to the generic resource identifier or one of "processors", "memory", "disk", or "swap". This name may be used as an id in the resource types web service.
slot	Integer	No	The slot in the rack where this node is located.
states	NodeStateInformation	Yes	This node's state. The states.powerState and states.state fields can be changed using PUT.
timeToLive	Date	No	Specifies the time that the node is supposed to be retired by Moab. Moab will not schedule any jobs on a node after its time to live has passed.
triggers	Set<DomainProxy>	No	Triggers associated with this node.
type	NodeType	No	The type of this node is governed by the types of resources it offers.
variables	Map<String, Map>	Yes	Variables is a map of key-value pairs, synonymous, but not directly related to, environment variables. They provide the mechanism to store arbitrary metdata which is useful to external systems in memory on this node.
virtualContainers	Set<DomainProxy>	No	The set of virtual containers that directly (not recursively) contain this node.
virtualMachines	Set<DomainProxy>	No	Virtual machines associated with this node.

NodeAclRule

This class represents a rule that can be in Moab's access control list (ACL) for a node.

The basic NodeAclRule information is the object's name and type. The type directly maps to an NodeAclType value. The default mechanism Moab uses to check the ACL for a particular item is if the user or object coming in has ANY of the values in the ACL, then the user or object is given access. If no values match the user or object in question, the user or object is rejected access.

Field Name	Type	PUT	Description
affinity	AclAffinity	Yes	Reservation ACLs allow or deny access to reserved resources but they may also be configured to affect a job's affinity for a particular reservation. By default, jobs gravitate toward reservations through a mechanism known as positive affinity. This mechanism allows jobs to run on the most constrained resources leaving other, unreserved resources free for use by other jobs that may not be able to access the reserved resources. Normally this is a desired behavior. However, sometimes, it is desirable to reserve resources for use only as a last resort-using the reserved resources only when there are no other resources available. This last resort behavior is known as negative affinity. Defaults to AclAffinity.POSITIVE.
comparator	ComparisonOperator	Yes	The type of comparison to make against the ACL object. Defaults to ComparisonOperator.EQUAL.
credentialLock	Boolean	No	Matching jobs will be required to run on the resources reserved by this reservation. You can use this modifier on accounts, classes, groups, qualities of service, and users.
excludeFromAcl	Boolean	No	If attribute is met, the requestor is denied access regardless of any other satisfied ACLs.
hardPolicyOnly	Boolean	No	ACLs marked with this modifier are ignored during soft policy scheduling and are only considered for hard policy scheduling once all eligible soft policy jobs start.
requireAll	Boolean	No	All required ACLs must be satisfied for requestor access to be granted.
type	NodeAclType	Yes	The type of the object that is being granted (or denied) access.
value	String	Yes	The name of the object that is being granted (or denied) access.
xorWithAcl	Boolean	No	All attributes of the type specified other than the ones listed in the ACL satisfy the ACL.

AclAffinity

This enumeration describes the values available for describing how a rule is used in establishing access to an object in Moab. Currently, these ACL affinities are used only for granting access to reservations.

Value	Description
NEGATIVE	Access to the object is repelled using this rule until access is the last choice.
NEUTRAL	Access to the object is not affected by affinity.
POSITIVE	Access to the object is looked at as the first choice.
PREEMPTIBLE	Access to the object given the rule gives preemptible status to the accessor. Supported only during GET.
REQUIRED	The rule in question must be satisified in order to gain access to the object. Supported only during GET.
UNAVAILABLE	The rule does not have its affinity available. Supported only during GET.

ComparisonOperator

This enumeration is used when Moab needs to compare items. One such use is in Access Control Lists (ACLs).

Value	Description
GREATER_THAN	Valid values: ">", "gt"
GREATER_THAN_OR_EQUAL	Valid values: ">=", "ge"
LESS_THAN	Valid values: "<", "lt"
LESS_THAN_OR_EQUAL	Valid values: "<=", "le"
EQUAL	Valid values: "==", "eq", "="
NOT_EQUAL	Valid values: "!=", "ne", "<>"
LEXIGRAPHIC_SUBSTRING	Valid value: "%<"
LEXIGRAPHIC_NOT_EQUAL	Valid value: "%!"
LEXIGRAPHIC_EQUAL	Valid value: "%="

NodeAclType

This enumeration describes the values available for the type of an ACL Rule.

Value	Description
USER	User
GROUP	Group
ACCOUNT	Account or Project
CLASS	Class or Queue
QOS	Quality of Service
CLUSTER	Cluster
JOB_ID	Job ID
RESERVATION_ID	Reservation ID
JOB_TEMPLATE	Job Template
JOB_ATTRIBUTE	Job Attribute
DURATION	Duration in Seconds
PROCESSOR_SECONDS	Processor Seconds
JPRIORITY	Not supported
MEMORY	Not supported
NODE	Not supported
PAR	Not supported
TASKSPERNODE	Not supported
PROC	Not supported
QTIME	Not supported
QUEUE	Not supported
RACK	Not supported
SCHED	Not supported
SYSTEM	Not supported
TASK	Not supported
VC	Not supported
XFACTOR	Not supported

DomainProxy

A reference to an object contained within an object. For example, a Virtual Machine object contains a reference to the Node on which it is running. That reference is represented by this class.

Field Name	Type	PUT	Description
name	String	No	The name of the object.

Message

Field Name	Type	PUT	Description
count	Integer	No	The number of times this message has occurred.
createdDate	Date	No	The date this message was created.
expireDate	Date	No	The date this message expires.
message	String	Yes	The message itself.

NodeOperatingSystemInformation

Describes the current or expected operating system image information for a node.

Field Name	Type	PUT	Description
hypervisorType	String	No	The hypervisor technology that this node uses. May be null if the node is not a hypervisor.
image	String	Yes	The name of the operating system currently running on this node. In cloud mode, this corresponds to the ID or name of an image in the image management API in MWS. (See also: Image.id, Image.name.)
imageExpected	String	No	The name of the image that was requested to run on this node (i.e. with `mnodectl -m os=myOs`). In cloud mode, this corresponds to the ID or name of an image in the image management API in MWS. (See also: Image.id, Image.name.)
imageLastUpdatedDate	Date	No	The last time the image of this node was modified.
imagesAvailable	Set<String>	No	The list of image names that can be applied to this node. In cloud mode, this corresponds to IDs or names of images in the image management API in MWS. (See also: Image.id, Image.name.)
virtualMachineImages	Set<String>	No	The list of virtual machine image names the node is capable of supporting. In cloud mode, this corresponds to IDs or names of images in the image management API in MWS. (See also: Image.id, Image.name.)

NodeResourceManager

Field Name	Type	PUT	Description
isMaster	Boolean	No	Indicates whether this resource manager is the "master" of this Node. If true, it means that this resource manager has the final say on all properties reported about this Node. Note that the first resource manager to report a node is the master resource manager.
name	String	No	The name of the resource manager, according to Moab. This name appears in both the RMCFG parameter, and when diagnosing resource managers (e.g. `mdiag -R`).
stateReported	NodeState	No	The state reported by this resource manager. See the State section for more details.

NodeState

This enumeration tracks the state of a node.

Value	Description
NONE	The node is set to none by the resource manager.
DOWN	The node is not available for workload.
IDLE	The node is available for workload but is not running anything.
BUSY	The node is running workload and cannot accept more.
RUNNING	The node is running workload and can accept more.
DRAINED	The node has been sent the drain request and has no workload on it.
DRAINING	The node has been sent the drain request, but still has workload on it.
FLUSH	The node is being reprovisioned.
RESERVED	The node is being reserved. This is an internal Moab state.
UNKNOWN	The state of the node is unknown.

Resource

Represents counts of resources available, configured, etc.

Field Name	Type	PUT	Description
available	Integer	No	The amount of this resource that is currently available for allocation to workload.
configured	Integer	No	The amount of this resource that is considered possible to schedule. Overcommit specifically applies to this, in other words, `configured = overcommitFactor * real`.
dedicated	Integer	No	The amount of this resource that has been allocated for running workload. When used in a job submission, this number is the amount of the resource required by the job.
real	Integer	No	The amount of this resource that physically exists on the node. Overcommit specifically doesn't apply to this. Note that overcommit currently only applies to "processors" and "memory", and so, for most cases, real and configured will always be the same.
utilized	Integer	No	The amount of this resource that is currently reported as utilized by resource managers.

NodeStateInformation

Field Name	Type	PUT	Description
powerState	NodePower	Yes	The state of the node's power system, as reported by the RM layer. Modifying the powerState is possible, and, if Moab is configured properly, a request will be made to modify the power state accordingly.
powerStateExpected	NodePower	No	The expected state of the node's power system. If a user has requested that a node be powered off (e.g. by modifying the powerState attribute to NodePower.OFF), the requested state will be shown in this field until the state change is completed. If there is no pending power change request, this will be null.
state	NodeState	Yes	The scheduling state of the Node, as reported by the resource management layer.
stateExpected	NodeState	No	The scheduling state of the Node, as expected by Moab. For example, Moab may think that a Node is "Busy" because it has allocated all configured resources, but a resource manager may report the state as "Running" based on actual utilization of the resources.
stateLastUpdatedDate	Date	No	A timestamp recording when the state of the Node was last modified.
subState	String	No	A text description of the state of the Node, with the intention of giving more details. Resource Managers may use this field to further describe the state being reported. Resource Managers should provide documented meaning to the possible sub-states that they can report.
subStateLast	String	No	The previous sub-state of the Node as reported by the resource management layer.
subStateLastUpdatedDate	Date	No	A timestamp recording when the sub-state was last modified.

NodePower

Represents the various options for a Node's power state.

Value	Description
NONE
ON
OFF

NodeType

Represents the type of node as reported by a resource manager.

Value	Description
Compute
License
Network
Storage

API version 2