Overview
The scheduler REST API returns information about various objects used by the YuniKorn Scheduler.
Many of these APIs return collections of resources. Internally, all resources are represented as raw
64-bit signed integer types. When interpreting responses from the REST API, resources of type memory
are returned in units of bytes while resources of type vcore are returned in units of millicores
(thousands of a core). All other resource types have no specific unit assigned.
Under the allocations field in the response content for the app/node-related calls in the following spec, placeholderUsed refers to whether or not the allocation is a replacement for a placeholder. If true, requestTime is the creation time of its placeholder allocation, otherwise it's that of the allocation's ask. allocationTime is the creation time of the allocation, and allocationDelay is simply the difference between allocationTime and requestTime.
Partitions
Returns general information and statistics about a partition.
URL : /ws/v1/partitions
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
[
{
"clusterId": "mycluster",
"name": "default",
"state": "Active",
"lastStateTransitionTime": 1649167576110754000,
"capacity": {
"capacity": {
"ephemeral-storage": 188176871424,
"hugepages-1Gi": 0,
"hugepages-2Mi": 0,
"memory": 1000000000,
"pods": 330,
"vcore": 1000
},
"usedCapacity": {
"memory": 800000000,
"vcore": 500
},
"utilization": {
"memory": 80,
"vcore": 50
}
},
"nodeSortingPolicy": {
"type": "fair",
"resourceWeights": {
"memory": 1.5,
"vcore": 1.3
}
},
"applications": {
"New": 5,
"Pending": 5,
"total": 10
},
"totalContainers": 0,
"totalNodes": 2
},
{
"clusterId": "mycluster",
"name": "gpu",
"state": "Active",
"lastStateTransitionTime": 1649167576111236000,
"capacity": {
"capacity": {
"memory": 2000000000,
"vcore": 2000
},
"usedCapacity": {
"memory": 500000000,
"vcore": 300
},
"utilization": {
"memory": 25,
"vcore": 15
}
},
"nodeSortingPolicy": {
"type": "binpacking",
"resourceWeights": {
"memory": 0,
"vcore": 4.11
}
},
"applications": {
"New": 5,
"Running": 10,
"Pending": 5,
"total": 20
},
"totalContainers": 20,
"totalNodes": 5
}
]
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Queues
Partition queues
Fetch all Queues associated with given Partition and displays general information about the queues like name, status, capacities and properties. The queues' hierarchy is kept in the response json.
URL : /ws/v1/partition/{partitionName}/queues
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
For the default queue hierarchy (only root.default leaf queue exists) a similar response to the following is sent back to the client:
[
{
"queuename": "root",
"status": "Active",
"maxResource": {
"ephemeral-storage": 188176871424,
"hugepages-1Gi": 0,
"hugepages-2Mi": 0,
"memory": 8000000000,
"pods": 330,
"vcore": 8000
},
"guaranteedResource": {
"memory": 54000000,
"vcore": 80
},
"allocatedResource": {
"memory": 54000000,
"vcore": 80
},
"pendingResource": {
"memory": 54000000,
"vcore": 80
},
"isLeaf": "false",
"isManaged": "false",
"properties": {
"application.sort.policy": "stateaware"
},
"parent": "",
"template": {
"maxResource": {
"memory": 8000000000,
"vcore": 8000
},
"guaranteedResource": {
"memory": 54000000,
"vcore": 80
},
"properties": {
"application.sort.policy": "stateaware"
}
},
"partition": "default",
"children": [
{
"queuename": "root.default",
"status": "Active",
"maxResource": {
"memory": 8000000000,
"vcore": 8000
},
"guaranteedResource": {
"memory": 54000000,
"vcore": 80
},
"allocatedResource": {
"memory": 54000000,
"vcore": 80
},
"pendingResource": {
"memory": 54000000,
"vcore": 80
},
"isLeaf": "true",
"isManaged": "false",
"properties": {
"application.sort.policy": "stateaware"
},
"parent": "root",
"template": null,
"children": [],
"absUsedCapacity": {
"memory": 1,
"vcore": 0
},
"maxRunningApps": 12,
"runningApps": 4,
"allocatingAcceptedApps": [
"app-1",
"app-2"
]
}
],
"absUsedCapacity": {
"memory": 1,
"vcore": 0
}
}
]
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Applications
Partition applications
Fetch all Applications for the given Partition/State combination and displays general information about the applications like used resources, queue name, submission time and allocations.
Only following application states are allowed: active, rejected, completed. Active is a fake state that represents all application states except completed and rejected.
For active state, can narrow the result by status query parameters(case-insensitive). For example, can fetch Running applications for the default partition by
/ws/v1/partition/default/applications/active?status=running.
URL : /ws/v1/partition/:partition/applications/:state
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
The content of the application object is the same as Queue Applications. See Queue Applications for details.
Queue applications
Fetch all Applications for the given Partition/Queue combination and displays general information about the applications like used resources, queue name, submission time and allocations.
URL : /ws/v1/partition/{partitionName}/queue/{queueName}/applications
Method : GET
Auth required : NO
Success response
Code : 200 OK
Deprecated:
Field uuid has been deprecated, would be removed from below response in YUNIKORN 1.7.0 release. AllocationID has replaced uuid. Both uuid and AllocationID fields have the same value. AllocationID has extra suffix containing hyphen and counter (-0, -1 and so on) at the end.
Content examples
In the example below there are three allocations belonging to two applications, one with a pending request.
[
{
"applicationID": "application-0001",
"usedResource": {
"memory": 4000000000,
"vcore": 4000
},
"maxUsedResource": {
"memory": 4000000000,
"vcore": 4000
},
"pendingResource": {
"memory": 4000000000,
"vcore": 4000
},
"partition": "default",
"queueName": "root.default",
"submissionTime": 1648754032076020293,
"requests": [
{
"allocationKey": "f137fab6-3cfa-4536-93f7-bfff92689382",
"allocationTags": {
"kubernetes.io/label/app": "sleep",
"kubernetes.io/label/applicationId": "application-0001",
"kubernetes.io/label/queue": "root.default",
"kubernetes.io/meta/namespace": "default",
"kubernetes.io/meta/podName": "task2"
},
"requestTime": 16487540320812345678,
"resource": {
"memory": 4000000000,
"vcore": 4000
},
"pendingCount": 1,
"priority": "0",
"requiredNodeId": "",
"applicationId": "application-0001",
"partition": "default",
"placeholder": false,
"placeholderTimeout": 0,
"taskGroupName": "",
"allocationLog": [
{
"message": "node(s) didn't match Pod's node affinity, node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate",
"lastOccurrence": 16487540320812346001,
"count": 81
},
{
"message": "node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate, node(s) didn't match Pod's node affinity",
"lastOccurrence": 16487540320812346002,
"count": 504
},
{
"message": "node(s) didn't match Pod's node affinity",
"lastOccurrence": 16487540320812346003,
"count": 1170
}
]
}
],
"allocations": [
{
"allocationKey": "deb12221-6b56-4fe9-87db-ebfadce9aa20",
"allocationTags": {
"kubernetes.io/label/app": "sleep",
"kubernetes.io/label/applicationId": "application-0001",
"kubernetes.io/label/queue": "root.default",
"kubernetes.io/meta/namespace": "default",
"kubernetes.io/meta/podName": "task0"
},
"requestTime": 1648754034098912461,
"allocationTime": 1648754035973982920,
"allocationDelay": 1875070459,
"uuid": "9af35d44-2d6f-40d1-b51d-758859e6b8a8",
"allocationID": "9af35d44-2d6f-40d1-b51d-758859e6b8a8-0",
"resource": {
"memory": 4000000000,
"vcore": 4000
},
"priority": "0",
"nodeId": "node-0001",
"applicationId": "application-0001",
"partition": "default",
"placeholder": false,
"placeholderUsed": true
}
],
"applicationState": "Running",
"user": "system:serviceaccount:kube-system:deployment-controller",
"groups": [
"system:serviceaccounts",
"system:serviceaccounts:kube-system",
"system:authenticated"
],
"rejectedMessage": "",
"stateLog": [
{
"time": 1648741409145224000,
"applicationState": "Accepted"
},
{
"time": 1648741409147432100,
"applicationState": "Running"
}
],
"placeholderData": [
{
"taskGroupName": "task-group-example",
"count": 2,
"minResource": {
"memory": 1000000000,
"vcore": 100
},
"replaced": 1,
"timedout": 1
}
],
"hasReserved": false,
"reservations": []
},
{
"applicationID": "application-0002",
"usedResource": {
"memory": 4000000000,
"vcore": 4000
},
"maxUsedResource": {
"memory": 4000000000,
"vcore": 4000
},
"pendingResource": {
"memory": 4000000000,
"vcore": 4000
},
"partition": "default",
"queueName": "root.default",
"submissionTime": 1648754032076020293,
"requests": [],
"allocations": [
{
"allocationKey": "54e5d77b-f4c3-4607-8038-03c9499dd99d",
"allocationTags": {
"kubernetes.io/label/app": "sleep",
"kubernetes.io/label/applicationId": "application-0002",
"kubernetes.io/label/queue": "root.default",
"kubernetes.io/meta/namespace": "default",
"kubernetes.io/meta/podName": "task0"
},
"requestTime": 1648754034098912461,
"allocationTime": 1648754035973982920,
"allocationDelay": 1875070459,
"uuid": "08033f9a-4699-403c-9204-6333856b41bd",
"allocationID": "08033f9a-4699-403c-9204-6333856b41bd-0",
"resource": {
"memory": 2000000000,
"vcore": 2000
},
"priority": "0",
"nodeId": "node-0001",
"applicationId": "application-0002",
"partition": "default",
"placeholder": false,
"placeholderUsed": false
},
{
"allocationKey": "af3bd2f3-31c5-42dd-8f3f-c2298ebdec81",
"allocationTags": {
"kubernetes.io/label/app": "sleep",
"kubernetes.io/label/applicationId": "application-0002",
"kubernetes.io/label/queue": "root.default",
"kubernetes.io/meta/namespace": "default",
"kubernetes.io/meta/podName": "task1"
},
"requestTime": 1648754034098912461,
"allocationTime": 1648754035973982920,
"allocationDelay": 1875070459,
"uuid": "96beeb45-5ed2-4c19-9a83-2ac807637b3b",
"allocationID": "96beeb45-5ed2-4c19-9a83-2ac807637b3b-0",
"resource": {
"memory": 2000000000,
"vcore": 2000
},
"priority": "0",
"nodeId": "node-0002",
"applicationId": "application-0002",
"partition": "default",
"placeholder": false,
"placeholderUsed": false
}
],
"applicationState": "Running",
"user": "system:serviceaccount:kube-system:deployment-controller",
"groups": [
"system:serviceaccounts",
"system:serviceaccounts:kube-system",
"system:authenticated"
],
"rejectedMessage": "",
"stateLog": [
{
"time": 1648741409145224000,
"applicationState": "Accepted"
},
{
"time": 1648741409147432100,
"applicationState": "Running"
}
],
"placeholderData": [],
"hasReserved": false,
"reservations": []
}
]
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Application
Partition/Queue application
Fetch an Application given a Partition, Queue(optional) and Application ID and displays general information about the application like used resources, queue name, submission time and allocations.
URL : /ws/v1/partition/{partitionName}/application/{appId} or /ws/v1/partition/{partitionName}/queue/{queueName}/application/{appId}
Method : GET
Auth required : NO
Success response
Code : 200 OK
Deprecated:
Field uuid has been deprecated, would be removed from below response in YUNIKORN 1.7.0 release. AllocationID has replaced uuid. Both uuid and AllocationID fields have the same value. AllocationID has extra suffix containing hyphen and counter (-0, -1 and so on) at the end.
Content example
{
"applicationID": "application-0001",
"usedResource": {
"memory": 4000000000,
"vcore": 4000
},
"maxUsedResource": {
"memory": 4000000000,
"vcore": 4000
},
"pendingResource": {
"memory": 4000000000,
"vcore": 4000
},
"partition": "default",
"queueName": "root.default",
"submissionTime": 1648754032076020293,
"requests": [
{
"allocationKey": "f137fab6-3cfa-4536-93f7-bfff92689382",
"allocationTags": {
"kubernetes.io/label/app": "sleep",
"kubernetes.io/label/applicationId": "application-0001",
"kubernetes.io/label/queue": "root.default",
"kubernetes.io/meta/namespace": "default",
"kubernetes.io/meta/podName": "task2"
},
"requestTime": 16487540320812345678,
"resource": {
"memory": 4000000000,
"vcore": 4000
},
"pendingCount": 1,
"priority": "0",
"requiredNodeId": "",
"applicationId": "application-0001",
"partition": "default",
"placeholder": false,
"placeholderTimeout": 0,
"taskGroupName": "",
"allocationLog": [
{
"message": "node(s) didn't match Pod's node affinity, node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate",
"lastOccurrence": 16487540320812346001,
"count": 81
},
{
"message": "node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate, node(s) didn't match Pod's node affinity",
"lastOccurrence": 16487540320812346002,
"count": 504
},
{
"message": "node(s) didn't match Pod's node affinity",
"lastOccurrence": 16487540320812346003,
"count": 1170
}
]
}
],
"allocations": [
{
"allocationKey": "deb12221-6b56-4fe9-87db-ebfadce9aa20",
"allocationTags": {
"kubernetes.io/label/app": "sleep",
"kubernetes.io/label/applicationId": "application-0001",
"kubernetes.io/label/queue": "root.default",
"kubernetes.io/meta/namespace": "default",
"kubernetes.io/meta/podName": "task0"
},
"requestTime": 1648754034098912461,
"allocationTime": 1648754035973982920,
"allocationDelay": 1875070459,
"uuid": "9af35d44-2d6f-40d1-b51d-758859e6b8a8",
"allocationID": "9af35d44-2d6f-40d1-b51d-758859e6b8a8-0",
"resource": {
"memory": 4000000000,
"vcore": 4000
},
"priority": "0",
"nodeId": "node-0001",
"applicationId": "application-0001",
"partition": "default",
"placeholder": false,
"placeholderUsed": true
}
],
"applicationState": "Running",
"user": "system:serviceaccount:kube-system:deployment-controller",
"groups": [
"system:serviceaccounts",
"system:serviceaccounts:kube-system",
"system:authenticated"
],
"rejectedMessage": "",
"stateLog": [
{
"time": 1648741409145224000,
"applicationState": "Accepted"
},
{
"time": 1648741409147432100,
"applicationState": "Running"
}
],
"placeholderData": [
{
"taskGroupName": "task-group-example",
"count": 2,
"minResource": {
"memory": 1000000000,
"vcore": 100
},
"replaced": 1,
"timedout": 1
}
],
"hasReserved": false,
"reservations": []
}
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
UsersTracker
Get users usage tracking information
Fetch all users usage given a Partition and displays general information about the users managed by YuniKorn.
URL : /ws/v1/partition/{partitionName}/usage/users
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content example
[
{
"userName": "user1",
"groups": {
"app2": "tester"
},
"queues":
{
"queuePath": "root",
"resourceUsage": {
"memory": 12000000000,
"vcore": 12000
},
"runningApplications": ["app1", "app2"],
"children": [
{
"queuePath": "root.default",
"resourceUsage": {
"memory": 6000000000,
"vcore": 6000
},
"runningApplications": ["app1"],
"children": []
},
{
"queuePath": "root.test",
"resourceUsage": {
"memory": 6000000000,
"vcore": 6000
},
"runningApplications": [
"app2"
],
"children": []
}]
}
},
{
"userName": "user2",
"groups": {
"app1": "tester"
},
"queues":
{
"queuePath": "root",
"resourceUsage": {
"memory": 11000000000,
"vcore": 10000
},
"runningApplications": ["app1", "app2", "app3"],
"children": [
{
"queuePath": "root.default",
"resourceUsage": {
"memory": 5000000000,
"vcore": 5000
},
"runningApplications": ["app1"],
"children": []
},
{
"queuePath": "root.test",
"resourceUsage": {
"memory": 4000000000,
"vcore": 4000
},
"runningApplications": [
"app3"
],
"children": []
}]
}
}
]
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
UserTracker
Get specific user usage tracking information
Fetch specific user usage given a Partition and displays general information about the users managed by YuniKorn.
URL : /ws/v1/partition/{partitionName}/usage/user/{userName}
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content example
{
"userName": "user1",
"groups": {
"app1": "tester"
},
"queues":
{
"queuePath": "root",
"resourceUsage": {
"memory": 12000000000,
"vcore": 12000
},
"runningApplications": ["app1", "app2"],
"children": [
{
"queuePath": "root.default",
"resourceUsage": {
"memory": 6000000000,
"vcore": 6000
},
"runningApplications": ["app1"],
"children": []
},
{
"queuePath": "root.test",
"resourceUsage": {
"memory": 6000000000,
"vcore": 6000
},
"runningApplications": [
"app2"
],
"children": []
}]
}
}
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
GroupsTracker
Get groups usage tracking information
Fetch all groups usage given a Partition and displays general information about the groups managed by YuniKorn.
URL : /ws/v1/partition/{partitionName}/usage/groups
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content example
[
{
"groupName": "group1",
"applications": ["app1", "app2"],
"queues":
{
"queuePath": "root",
"resourceUsage": {
"memory": 12000000000,
"vcore": 12000
},
"runningApplications": ["app1", "app2"],
"children": [
{
"queuePath": "root.default",
"resourceUsage": {
"memory": 6000000000,
"vcore": 6000
},
"runningApplications": ["app1"],
"children": []
},
{
"queuePath": "root.test",
"resourceUsage": {
"memory": 6000000000,
"vcore": 6000
},
"runningApplications": [
"app2"
],
"children": []
}]
}
},
{
"groupName": "group2",
"applications": ["app1", "app2", "app3"],
"queues":
{
"queuePath": "root",
"resourceUsage": {
"memory": 11000000000,
"vcore": 10000
},
"runningApplications": ["app1", "app2", "app3"],
"children": [
{
"queuePath": "root.default",
"resourceUsage": {
"memory": 5000000000,
"vcore": 5000
},
"runningApplications": ["app1"],
"children": []
},
{
"queuePath": "root.test",
"resourceUsage": {
"memory": 4000000000,
"vcore": 4000
},
"runningApplications": [
"app3"
],
"children": []
}]
}
}
]
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
GroupTracker
Get specific group usage tracking information
Fetch specific group usage given a Partition and displays general information about the groups managed by YuniKorn.
URL : /ws/v1/partition/{partitionName}/usage/group/{groupName}
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content example
{
"groupName": "group1",
"applications": ["app1", "app2"],
"queues":
{
"queuePath": "root",
"resourceUsage": {
"memory": 12000000000,
"vcore": 12000
},
"runningApplications": ["app1", "app2"],
"children": [
{
"queuePath": "root.default",
"resourceUsage": {
"memory": 6000000000,
"vcore": 6000
},
"runningApplications": ["app1"],
"children": []
},
{
"queuePath": "root.test",
"resourceUsage": {
"memory": 6000000000,
"vcore": 6000
},
"runningApplications": [
"app2"
],
"children": []
}]
}
}
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Nodes
Partition nodes
Fetch all Nodes associated with given Partition and displays general information about the nodes managed by YuniKorn. Node details include host and rack name, capacity, resources, utilization, and allocations.
URL : /ws/v1/partition/{partitionName}/nodes
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
Here you can see an example response from a 2-node cluster having 3 allocations.
[
{
"nodeID": "node-0001",
"hostName": "",
"rackName": "",
"attributes": {
"beta.kubernetes.io/arch": "amd64",
"beta.kubernetes.io/os": "linux",
"kubernetes.io/arch": "amd64",
"kubernetes.io/hostname": "node-0001",
"kubernetes.io/os": "linux",
"node-role.kubernetes.io/control-plane": "",
"node-role.kubernetes.io/master": "",
"node.kubernetes.io/exclude-from-external-load-balancers": "",
"ready": "true",
"si.io/hostname": "node-0001",
"si.io/rackname": "/rack-default",
"si/instance-type": "",
"si/node-partition": "[mycluster]default"
},
"capacity": {
"ephemeral-storage": 75850798569,
"hugepages-1Gi": 0,
"hugepages-2Mi": 0,
"memory": 14577000000,
"pods": 110,
"vcore": 10000
},
"allocated": {
"memory": 6000000000,
"vcore": 6000
},
"occupied": {
"memory": 154000000,
"vcore" :750
},
"available": {
"ephemeral-storage": 75850798569,
"hugepages-1Gi": 0,
"hugepages-2Mi": 0,
"memory": 6423000000,
"pods": 110,
"vcore": 1250
},
"utilized": {
"memory": 3,
"vcore": 13
},
"allocations": [
{
"allocationKey": "54e5d77b-f4c3-4607-8038-03c9499dd99d",
"allocationTags": {
"kubernetes.io/label/app": "sleep",
"kubernetes.io/label/applicationId": "application-0001",
"kubernetes.io/label/queue": "root.default",
"kubernetes.io/meta/namespace": "default",
"kubernetes.io/meta/podName": "task0"
},
"requestTime": 1648754034098912461,
"allocationTime": 1648754035973982920,
"allocationDelay": 1875070459,
"uuid": "08033f9a-4699-403c-9204-6333856b41bd",
"allocationID": "08033f9a-4699-403c-9204-6333856b41bd-0",
"resource": {
"memory": 2000000000,
"vcore": 2000
},
"priority": "0",
"nodeId": "node-0001",
"applicationId": "application-0001",
"partition": "default",
"placeholder": false,
"placeholderUsed": false
},
{
"allocationKey": "deb12221-6b56-4fe9-87db-ebfadce9aa20",
"allocationTags": {
"kubernetes.io/label/app": "sleep",
"kubernetes.io/label/applicationId": "application-0002",
"kubernetes.io/label/queue": "root.default",
"kubernetes.io/meta/namespace": "default",
"kubernetes.io/meta/podName": "task0"
},
"requestTime": 1648754034098912461,
"allocationTime": 1648754035973982920,
"allocationDelay": 1875070459,
"uuid": "9af35d44-2d6f-40d1-b51d-758859e6b8a8",
"allocationID": "9af35d44-2d6f-40d1-b51d-758859e6b8a8-0",
"resource": {
"memory": 4000000000,
"vcore": 4000
},
"priority": "0",
"nodeId": "node-0001",
"applicationId": "application-0002",
"partition": "default",
"placeholder": false,
"placeholderUsed": false
}
],
"schedulable": true
},
{
"nodeID": "node-0002",
"hostName": "",
"rackName": "",
"attributes": {
"beta.kubernetes.io/arch": "amd64",
"beta.kubernetes.io/os": "linux",
"kubernetes.io/arch": "amd64",
"kubernetes.io/hostname": "node-0002",
"kubernetes.io/os": "linux",
"ready": "false",
"si.io/hostname": "node-0002",
"si.io/rackname": "/rack-default",
"si/instance-type": "",
"si/node-partition": "[mycluster]default"
},
"capacity": {
"ephemeral-storage": 75850798569,
"hugepages-1Gi": 0,
"hugepages-2Mi": 0,
"memory": 14577000000,
"pods": 110,
"vcore": 10000
},
"allocated": {
"memory": 2000000000,
"vcore": 2000
},
"occupied": {
"memory": 154000000,
"vcore" :750
},
"available": {
"ephemeral-storage": 75850798569,
"hugepages-1Gi": 0,
"hugepages-2Mi": 0,
"memory": 6423000000,
"pods": 110,
"vcore": 1250
},
"utilized": {
"memory": 8,
"vcore": 38
},
"allocations": [
{
"allocationKey": "af3bd2f3-31c5-42dd-8f3f-c2298ebdec81",
"allocationTags": {
"kubernetes.io/label/app": "sleep",
"kubernetes.io/label/applicationId": "application-0001",
"kubernetes.io/label/queue": "root.default",
"kubernetes.io/meta/namespace": "default",
"kubernetes.io/meta/podName": "task1"
},
"requestTime": 1648754034098912461,
"allocationTime": 1648754035973982920,
"allocationDelay": 1875070459,
"uuid": "96beeb45-5ed2-4c19-9a83-2ac807637b3b",
"allocationID": "96beeb45-5ed2-4c19-9a83-2ac807637b3b-0",
"resource": {
"memory": 2000000000,
"vcore": 2000
},
"priority": "0",
"nodeId": "node-0002",
"applicationId": "application-0001",
"partition": "default",
"placeholder": false,
"placeholderUsed": false
}
],
"schedulable": true,
"isReserved": false,
"reservations": []
}
]
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Node
Partition node
Fetch a Node associated with given Partition and Node ID and displays general information about the node managed by YuniKorn. Node details include host and rack name, capacity, resources, utilization, and allocations.
URL : /ws/v1/partition/{partitionName}/node/{nodeId}
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
{
"nodeID":"node-0001",
"hostName":"",
"rackName":"",
"capacity":{
"ephemeral-storage":75850798569,
"hugepages-1Gi":0,
"hugepages-2Mi":0,
"memory":14577000000,
"pods":110,
"vcore":10000
},
"allocated":{
"memory":6000000000,
"vcore":6000
},
"occupied":{
"memory":154000000,
"vcore":750
},
"available":{
"ephemeral-storage":75850798569,
"hugepages-1Gi":0,
"hugepages-2Mi":0,
"memory":6423000000,
"pods":110,
"vcore":1250
},
"utilized":{
"memory":3,
"vcore":13
},
"allocations":[
{
"allocationKey":"54e5d77b-f4c3-4607-8038-03c9499dd99d",
"allocationTags":{
"kubernetes.io/label/app":"sleep",
"kubernetes.io/label/applicationId":"application-0001",
"kubernetes.io/label/queue":"root.default",
"kubernetes.io/meta/namespace":"default",
"kubernetes.io/meta/podName":"task0"
},
"requestTime":1648754034098912461,
"allocationTime":1648754035973982920,
"allocationDelay":1875070459,
"uuid":"08033f9a-4699-403c-9204-6333856b41bd",
"allocationID":"08033f9a-4699-403c-9204-6333856b41bd-0",
"resource":{
"memory":2000000000,
"vcore":2000
},
"priority":"0",
"nodeId":"node-0001",
"applicationId":"application-0001",
"partition":"default",
"placeholder":false,
"placeholderUsed":false
},
{
"allocationKey":"deb12221-6b56-4fe9-87db-ebfadce9aa20",
"allocationTags":{
"kubernetes.io/label/app":"sleep",
"kubernetes.io/label/applicationId":"application-0002",
"kubernetes.io/label/queue":"root.default",
"kubernetes.io/meta/namespace":"default",
"kubernetes.io/meta/podName":"task0"
},
"requestTime":1648754034098912461,
"allocationTime":1648754035973982920,
"allocationDelay":1875070459,
"uuid":"9af35d44-2d6f-40d1-b51d-758859e6b8a8",
"allocationID":"9af35d44-2d6f-40d1-b51d-758859e6b8a8-0",
"resource":{
"memory":4000000000,
"vcore":4000
},
"priority":"0",
"nodeId":"node-0001",
"applicationId":"application-0002",
"partition":"default",
"placeholder":false,
"placeholderUsed":false
}
],
"schedulable":true
}
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Node utilization
Show how every node is distributed with regard to dominant resource utilization.
Status : Deprecated since v1.5.0 and will be removed in the next major release. Replaced with /ws/v1/scheduler/node-utilizations.
URL : /ws/v1/scheduler/node-utilization
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
{
"type": "vcore",
"utilization": [
{
"bucketName": "0-10%",
"numOfNodes": 1,
"nodeNames": [
"aethergpu"
]
},
{
"bucketName": "10-20%",
"numOfNodes": 2,
"nodeNames": [
"primary-node",
"second-node"
]
},
...
]
}
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Node utilizations
Show the nodes utilization of different types of resources in a cluster.
URL : /ws/v1/scheduler/node-utilizations
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
[
{
"clusterId": "mycluster",
"partition": "default",
"utilizations": [
{
"type": "pods",
"utilization": [
{
"bucketName": "0-10%",
"numOfNodes": 2,
"nodeNames": [
"primary-node",
"second-node"
]
},
{
"bucketName": "10-20%"
},
...
]
},
{
"type": "vcores",
"utilization": [
{
"bucketName": "0-10%",
"numOfNodes": 2,
"nodeNames": [
"primary-node",
"second-node"
]
},
{
"bucketName": "10-20%"
},
...
]
},
...
]
}
]
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Goroutines info
Dumps the stack traces of the currently running goroutines.
URL : /ws/v1/stack
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
goroutine 356 [running
]:
github.com/apache/yunikorn-core/pkg/webservice.getStackInfo.func1(0x30a0060,
0xc003e900e0,
0x2)
/yunikorn/go/pkg/mod/github.com/apache/yunikorn-core@v0.0.0-20200717041747-f3e1c760c714/pkg/webservice/handlers.go: 41 +0xab
github.com/apache/yunikorn-core/pkg/webservice.getStackInfo(0x30a0060,
0xc003e900e0,
0xc00029ba00)
/yunikorn/go/pkg/mod/github.com/apache/yunikorn-core@v0.0.0-20200717041747-f3e1c760c714/pkg/webservice/handlers.go: 48 +0x71
net/http.HandlerFunc.ServeHTTP(0x2df0e10,
0x30a0060,
0xc003e900e0,
0xc00029ba00)
/usr/local/go/src/net/http/server.go: 1995 +0x52
github.com/apache/yunikorn-core/pkg/webservice.Logger.func1(0x30a0060,
0xc003e900e0,
0xc00029ba00)
/yunikorn/go/pkg/mod/github.com/apache/yunikorn-core@v0.0.0-20200717041747-f3e1c760c714/pkg/webservice/webservice.go: 65 +0xd4
net/http.HandlerFunc.ServeHTTP(0xc00003a570,
0x30a0060,
0xc003e900e0,
0xc00029ba00)
/usr/local/go/src/net/http/server.go: 1995 +0x52
github.com/gorilla/mux.(*Router).ServeHTTP(0xc00029cb40,
0x30a0060,
0xc003e900e0,
0xc0063fee00)
/yunikorn/go/pkg/mod/github.com/gorilla/mux@v1.7.3/mux.go: 212 +0x140
net/http.serverHandler.ServeHTTP(0xc0000df520,
0x30a0060,
0xc003e900e0,
0xc0063fee00)
/usr/local/go/src/net/http/server.go: 2774 +0xcf
net/http.(*conn).serve(0xc0000eab40,
0x30a61a0,
0xc003b74000)
/usr/local/go/src/net/http/server.go: 1878 +0x812
created by net/http.(*Server).Serve
/usr/local/go/src/net/http/server.go: 2884 +0x4c5
goroutine 1 [chan receive,
26 minutes
]:
main.main()
/yunikorn/pkg/shim/main.go: 52 +0x67a
goroutine 19 [syscall,
26 minutes
]:
os/signal.signal_recv(0x1096f91)
/usr/local/go/src/runtime/sigqueue.go: 139 +0x9f
os/signal.loop()
/usr/local/go/src/os/signal/signal_unix.go: 23 +0x30
created by os/signal.init.0
/usr/local/go/src/os/signal/signal_unix.go: 29 +0x4f
...
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Metrics
Endpoint to retrieve metrics from the Prometheus server. The metrics are dumped with help messages and type information.
URL : /ws/v1/metrics
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
# HELP go_gc_duration_seconds A summary of the pause duration of garbage collection cycles.
# TYPE go_gc_duration_seconds summary
go_gc_duration_seconds{quantile="0"} 2.567e-05
go_gc_duration_seconds{quantile="0.25"} 3.5727e-05
go_gc_duration_seconds{quantile="0.5"} 4.5144e-05
go_gc_duration_seconds{quantile="0.75"} 6.0024e-05
go_gc_duration_seconds{quantile="1"} 0.00022528
go_gc_duration_seconds_sum 0.021561648
go_gc_duration_seconds_count 436
# HELP go_goroutines Number of goroutines that currently exist.
# TYPE go_goroutines gauge
go_goroutines 82
# HELP go_info Information about the Go environment.
# TYPE go_info gauge
go_info{version="go1.12.17"} 1
# HELP go_memstats_alloc_bytes Number of bytes allocated and still in use.
# TYPE go_memstats_alloc_bytes gauge
go_memstats_alloc_bytes 9.6866248e+07
...
# HELP yunikorn_scheduler_vcore_nodes_usage Nodes resource usage, by resource name.
# TYPE yunikorn_scheduler_vcore_nodes_usage gauge
yunikorn_scheduler_vcore_nodes_usage{range="(10%, 20%]"} 0
yunikorn_scheduler_vcore_nodes_usage{range="(20%,30%]"} 0
yunikorn_scheduler_vcore_nodes_usage{range="(30%,40%]"} 0
yunikorn_scheduler_vcore_nodes_usage{range="(40%,50%]"} 0
yunikorn_scheduler_vcore_nodes_usage{range="(50%,60%]"} 0
yunikorn_scheduler_vcore_nodes_usage{range="(60%,70%]"} 0
yunikorn_scheduler_vcore_nodes_usage{range="(70%,80%]"} 1
yunikorn_scheduler_vcore_nodes_usage{range="(80%,90%]"} 0
yunikorn_scheduler_vcore_nodes_usage{range="(90%,100%]"} 0
yunikorn_scheduler_vcore_nodes_usage{range="[0,10%]"} 0
Configuration validation
URL : /ws/v1/validate-conf
Method : POST
Auth required : NO
Success response
Regardless whether the configuration is allowed or not if the server was able to process the request, it will yield a 200 HTTP status code.
Code : 200 OK
Allowed configuration
Sending the following simple configuration yields an accept
partitions:
- name: default
queues:
- name: root
queues:
- name: test
Reponse
{
"allowed": true,
"reason": ""
}
Disallowed configuration
The following configuration is not allowed due to the "wrong_text" field put into the yaml file.
partitions:
- name: default
queues:
- name: root
queues:
- name: test
- wrong_text
Reponse
{
"allowed": false,
"reason": "yaml: unmarshal errors:\n line 7: cannot unmarshal !!str `wrong_text` into configs.PartitionConfig"
}
Configuration
Endpoint to retrieve the current scheduler configuration
URL : /ws/v1/config
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content example (with Accept: application/json header)
{
"Partitions": [
{
"Name": "default",
"Queues": [
{
"Name": "root",
"Parent": true,
"Resources": {},
"SubmitACL": "*",
"ChildTemplate": {
"Resources": {}
}
}
],
"PlacementRules": [
{
"Name": "tag",
"Create": true,
"Filter": {
"Type": ""
},
"Value": "namespace"
}
],
"Preemption": {
"Enabled": false
},
"NodeSortPolicy": {
"Type": ""
}
}
],
"Checksum": "FD5D3726DF0F02416E02F3919D78F61B15D14425A34142D93B24C137ED056946",
"Extra": {
"event.trackingEnabled": "false",
"log.core.scheduler.level": "info",
"log.core.security.level": "info",
"log.level": "debug"
}
}
Content example (without Accept: application/json header)
partitions:
- name: default
queues:
- name: root
parent: true
submitacl: "*"
placementrules:
- name: tag
create: true
value: namespace
checksum: FD5D3726DF0F02416E02F3919D78F61B15D14425A34142D93B24C137ED056946
extra:
event.trackingEnabled: "false"
log.core.scheduler.level: info
log.core.security.level: info
log.level: debug
Application history
Endpoint to retrieve historical data about the number of total applications by timestamp.
URL : /ws/v1/history/apps
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
[
{
"timestamp": 1595939966153460000,
"totalApplications": "1"
},
{
"timestamp": 1595940026152892000,
"totalApplications": "1"
},
{
"timestamp": 1595940086153799000,
"totalApplications": "2"
},
{
"timestamp": 1595940146154497000,
"totalApplications": "2"
},
{
"timestamp": 1595940206155187000,
"totalApplications": "2"
}
]
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Container history
Endpoint to retrieve historical data about the number of total containers by timestamp.
URL : /ws/v1/history/containers
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
[
{
"timestamp": 1595939966153460000,
"totalContainers": "1"
},
{
"timestamp": 1595940026152892000,
"totalContainers": "1"
},
{
"timestamp": 1595940086153799000,
"totalContainers": "3"
},
{
"timestamp": 1595940146154497000,
"totalContainers": "3"
},
{
"timestamp": 1595940206155187000,
"totalContainers": "3"
}
]
Error response
Code : 500 Internal Server Error
Content examples
{
"status_code": 500,
"message": "system error message. for example, json: invalid UTF-8 in string: ..",
"description": "system error message. for example, json: invalid UTF-8 in string: .."
}
Endpoint healthcheck
Endpoint to retrieve historical data about critical logs, negative resource on node/cluster/app, ...
URL : /ws/v1/scheduler/healthcheck
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
{
"Healthy": true,
"HealthChecks": [
{
"Name": "Scheduling errors",
"Succeeded": true,
"Description": "Check for scheduling error entries in metrics",
"DiagnosisMessage": "There were 0 scheduling errors logged in the metrics"
},
{
"Name": "Failed nodes",
"Succeeded": true,
"Description": "Check for failed nodes entries in metrics",
"DiagnosisMessage": "There were 0 failed nodes logged in the metrics"
},
{
"Name": "Negative resources",
"Succeeded": true,
"Description": "Check for negative resources in the partitions",
"DiagnosisMessage": "Partitions with negative resources: []"
},
{
"Name": "Negative resources",
"Succeeded": true,
"Description": "Check for negative resources in the nodes",
"DiagnosisMessage": "Nodes with negative resources: []"
},
{
"Name": "Consistency of data",
"Succeeded": true,
"Description": "Check if a node's allocated resource <= total resource of the node",
"DiagnosisMessage": "Nodes with inconsistent data: []"
},
{
"Name": "Consistency of data",
"Succeeded": true,
"Description": "Check if total partition resource == sum of the node resources from the partition",
"DiagnosisMessage": "Partitions with inconsistent data: []"
},
{
"Name": "Consistency of data",
"Succeeded": true,
"Description": "Check if node total resource = allocated resource + occupied resource + available resource",
"DiagnosisMessage": "Nodes with inconsistent data: []"
},
{
"Name": "Consistency of data",
"Succeeded": true,
"Description": "Check if node capacity >= allocated resources on the node",
"DiagnosisMessage": "Nodes with inconsistent data: []"
},
{
"Name": "Reservation check",
"Succeeded": true,
"Description": "Check the reservation nr compared to the number of nodes",
"DiagnosisMessage": "Reservation/node nr ratio: [0.000000]"
}
]
}
Retrieve full state dump
Endpoint to retrieve the following information in a single response:
- Current timestamp (Unix timestamp in nanosecond)
- List of partitions
- List of applications (running, completed and rejected)
- Application history
- Nodes
- Generic cluster information
- Container history
- Queues
- RMDiagnostics
- Log level
- Configuration
URL : /ws/v1/fullstatedump
Method : GET
Auth required : NO
Success response
Code : 200 OK
Content examples
The output of this REST query can be rather large, and it is a combination of those which have already been demonstrated.
The RMDiagnostics shows the content of the K8Shim cache. The exact content is version dependent and has not stabilised.
The current content shows the cached objects:
- nodes
- pods
- priorityClasses
- schedulingState (pod status)
Failure response
Code: 500 Internal Server Error
Batch Events
Endpoint is used to retrieve a batch of event records.
URL: /ws/v1/events/batch
METHOD : GET
Auth required : NO
URL query parameters :
count(optional) : Specifies the maxmem number of events to be included in the response.start(optional) : Specifies the starting ID for retrieving events. If the specified ID is outside the ring buffer (too low or too high), the response will include the lowest and highest ID values withEventRecordsbeing empty.
Success response
Code: 200 OK
Content examples
{
"InstanceUUID": "400046c6-2180-41a2-9be1-1c251ab2c498",
"LowestID": 0,
"HighestID": 7,
"EventRecords": [
{
"type": 3,
"objectID": "yk8s-worker",
"message": "schedulable: true",
"timestampNano": 1701347180239597300,
"eventChangeType": 1,
"eventChangeDetail": 302,
"resource": {}
},
{
"type": 3,
"objectID": "yk8s-worker",
"message": "Node added to the scheduler",
"timestampNano": 1701347180239650600,
"eventChangeType": 2,
"resource": {
"resources": {
"ephemeral-storage": {
"value": 502921060352
},
"hugepages-1Gi": {},
"hugepages-2Mi": {},
"memory": {
"value": 33424998400
},
"pods": {
"value": 110
},
"vcore": {
"value": 8000
}
}
}
}
]
}
Error response
Code : 500 Internal Server Error
Event stream
Creates a persistent HTTP connection for event streaming. New events are sent to the clients immediately, so unlike the batch interface, there is no need for polling.
The number of active connections is limited. The default setting is 100 connections total and 15 connections per host. The respective configmap properties are event.maxStreams and event.maxStreamsPerHost.
URL: /ws/v1/events/stream
METHOD : GET
Auth required : NO
URL query parameters:
count(optional) : Specifies the number of past events (those which have been generated before the connection establishment) to include in the response. Default value is 0.
Success response
Code: 200 OK
Content examples
{"type":2,"objectID":"app-1","timestampNano":1708465452903045265,"eventChangeType":1,"eventChangeDetail":204,"resource":{}}
{"type":2,"objectID":"app-1","timestampNano":1708465452903192898,"eventChangeType":2,"eventChangeDetail":201,"referenceID":"alloc-1","resource":{"resources":{"memory":{"value":10000000},"vcore":{"value":1000}}}}
{"type":3,"objectID":"node-1:1234","timestampNano":1708465452903312146,"eventChangeType":2,"eventChangeDetail":303,"referenceID":"alloc-1","resource":{"resources":{"memory":{"value":10000000},"vcore":{"value":1000}}}}
{"type":2,"objectID":"app-1","timestampNano":1708465452903474210,"eventChangeType":1,"eventChangeDetail":205,"resource":{}}
{"type":5,"objectID":"testuser","timestampNano":1708465452903506166,"eventChangeType":2,"eventChangeDetail":603,"referenceID":"root.singleleaf","resource":{"resources":{"memory":{"value":10000000},"vcore":{"value":1000}}}}
Error responses
Code : 400 Bad Request (URL query is invalid)
Code : 503 Service Unavailable (Too many active streaming connections)
Code : 500 Internal Server Error