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It's a customized scheduler try to resolve parallel tasks depends on …
…same volume but maybe run on different nodes. This is a draft version, try to introduce `Scheduler framework` to handle the issue, for now we adopt `affinity assistant` but has issue to measure total resource requirements. Details please check issue: tektoncd/pipeline#3052 I think we will enhance it soon based on further discussion, thanks.
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| defaultBaseImage: gcr.io/distroless/static:nonroot |
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| # The OWNERS file is used by prow to automatically merge approved PRs. | ||
| # See https://github.com/kubernetes/test-infra/tree/master/prow/plugins/approve/approvers. | ||
| # It supports a list of approvers and reviewers and their github names must be provided. | ||
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| approvers: | ||
| - ImJasonH | ||
| - jlpettersson | ||
| - vincent-pli |
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| # coscheduler-same-node | ||
| The repo is for trying to implements such a scheduler: | ||
| https://github.com/tektoncd/pipeline/issues/3052 | ||
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| # Installation | ||
| ``` | ||
| ko apply -f config/ | ||
| ``` | ||
|
|
||
| # Take a try | ||
| `kubectl create -f examples/pods.yaml` | ||
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||
| # Description | ||
| The `scheduler` is based on [Scheduler plugin framework](https://github.com/kubernetes/enhancements/blob/master/keps/sig-scheduling/20180409-scheduling-framework.md) | ||
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| Use special labels of `pod` to mark the group of pods. | ||
| ``` | ||
| labels: | ||
| pod-group.scheduling.sigs.k8s.io/name: test | ||
| pod-group.scheduling.sigs.k8s.io/total: "2" | ||
| ``` | ||
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| The `pod`s in same `pod-group` will be scheduler to same node if the node can satisfy the resource requirement of whole group, or all pods in the group will `pending`. |
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| /* | ||
| Copyright 2020 The Tekton Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "math/rand" | ||
| "os" | ||
| "time" | ||
|
|
||
| "k8s.io/kubernetes/cmd/kube-scheduler/app" | ||
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| "github.com/tektoncd/experimental/scheduler/pkg/coscheduler" | ||
| ) | ||
|
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| func main() { | ||
| rand.Seed(time.Now().UnixNano()) | ||
| // Register custom plugins to the scheduler framework. | ||
| // Later they can consist of scheduler profile(s) and hence | ||
| // used by various kinds of workloads. | ||
| command := app.NewSchedulerCommand( | ||
| app.WithPlugin(coscheduler.CoschedulerName, coscheduler.NewCoscheduler), | ||
| ) | ||
| if err := command.Execute(); err != nil { | ||
| os.Exit(1) | ||
| } | ||
| } |
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| apiVersion: v1 | ||
| kind: ServiceAccount | ||
| metadata: | ||
| name: sample-sa | ||
| namespace: kube-system |
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| kind: ClusterRole | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| metadata: | ||
| name: sample-cr | ||
| rules: | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - endpoints | ||
| - events | ||
| verbs: | ||
| - create | ||
| - get | ||
| - update | ||
| - apiGroups: | ||
| - "" | ||
| resourceNames: | ||
| - scheduler-framework-sample | ||
| resources: | ||
| - endpoints | ||
| verbs: | ||
| - delete | ||
| - get | ||
| - patch | ||
| - update | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - nodes | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - pods | ||
| verbs: | ||
| - delete | ||
| - get | ||
| - list | ||
| - watch | ||
| - update | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - bindings | ||
| - pods/binding | ||
| verbs: | ||
| - create | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - pods/status | ||
| verbs: | ||
| - patch | ||
| - update | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - replicationcontrollers | ||
| - services | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| - apiGroups: | ||
| - apps | ||
| - extensions | ||
| resources: | ||
| - replicasets | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| - apiGroups: | ||
| - apps | ||
| resources: | ||
| - statefulsets | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| - apiGroups: | ||
| - policy | ||
| resources: | ||
| - poddisruptionbudgets | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - persistentvolumeclaims | ||
| - persistentvolumes | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - configmaps | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| - apiGroups: | ||
| - "storage.k8s.io" | ||
| resources: | ||
| - storageclasses | ||
| - csinodes | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch | ||
| - apiGroups: | ||
| - "coordination.k8s.io" | ||
| resources: | ||
| - leases | ||
| verbs: | ||
| - create | ||
| - get | ||
| - list | ||
| - update | ||
| - apiGroups: | ||
| - "events.k8s.io" | ||
| resources: | ||
| - events | ||
| verbs: | ||
| - create | ||
| - patch | ||
| - update |
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| kind: ClusterRoleBinding | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| metadata: | ||
| name: sample-crb | ||
| namespace: kube-system | ||
| roleRef: | ||
| apiGroup: rbac.authorization.k8s.io | ||
| kind: ClusterRole | ||
| name: sample-cr | ||
| subjects: | ||
| - kind: ServiceAccount | ||
| name: sample-sa | ||
| namespace: kube-system |
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| apiVersion: v1 | ||
| kind: ConfigMap | ||
| metadata: | ||
| name: scheduler-config | ||
| namespace: kube-system | ||
| data: | ||
| scheduler-config.yaml: | | ||
| apiVersion: kubescheduler.config.k8s.io/v1alpha1 | ||
| kind: KubeSchedulerConfiguration | ||
| schedulerName: scheduler-framework-sample | ||
| leaderElection: | ||
| leaderElect: true | ||
| lockObjectName: scheduler-framework-sample | ||
| lockObjectNamespace: kube-system | ||
| plugins: | ||
| queueSort: | ||
| enabled: | ||
| - name: CoschedulerSamenode | ||
| disabled: | ||
| - name: "*" | ||
| preFilter: | ||
| enabled: | ||
| - name: CoschedulerSamenode | ||
| filter: | ||
| enabled: | ||
| - name: CoschedulerSamenode | ||
| postBind: | ||
| enabled: | ||
| - name: CoschedulerSamenode |
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| apiVersion: apps/v1 | ||
| kind: Deployment | ||
| metadata: | ||
| name: scheduler-framework-sample | ||
| namespace: kube-system | ||
| labels: | ||
| component: scheduler-framework-sample | ||
| spec: | ||
| replicas: 1 | ||
| selector: | ||
| matchLabels: | ||
| component: scheduler-framework-sample | ||
| template: | ||
| metadata: | ||
| labels: | ||
| component: scheduler-framework-sample | ||
| spec: | ||
| serviceAccount: sample-sa | ||
| priorityClassName: system-cluster-critical | ||
| volumes: | ||
| - name: scheduler-config | ||
| configMap: | ||
| name: scheduler-config | ||
| containers: | ||
| - name: scheduler-ctrl | ||
| image: ko://github.com/tektoncd/experimental/scheduler/cmd | ||
| imagePullPolicy: Always | ||
| args: | ||
| - kube-scheduler | ||
| - --config=/scheduler/scheduler-config.yaml | ||
| - --v=3 | ||
| resources: | ||
| requests: | ||
| cpu: "50m" | ||
| volumeMounts: | ||
| - name: scheduler-config | ||
| mountPath: /scheduler |
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| apiVersion: v1 | ||
| kind: Pod | ||
| metadata: | ||
| name: static-web | ||
| labels: | ||
| pod-group.scheduling.sigs.k8s.io/name: test | ||
| pod-group.scheduling.sigs.k8s.io/total: "2" | ||
| spec: | ||
| schedulerName: scheduler-framework-sample | ||
| containers: | ||
| - name: web | ||
| image: nginx | ||
| resources: | ||
| requests: | ||
| cpu: "4000m" | ||
| limits: | ||
| cpu: "4000m" | ||
| ports: | ||
| - name: web | ||
| containerPort: 80 | ||
| protocol: TCP | ||
| --- | ||
| apiVersion: v1 | ||
| kind: Pod | ||
| metadata: | ||
| name: static-web-1 | ||
| labels: | ||
| pod-group.scheduling.sigs.k8s.io/name: test | ||
| pod-group.scheduling.sigs.k8s.io/total: "2" | ||
| spec: | ||
| schedulerName: scheduler-framework-sample | ||
| containers: | ||
| - name: web | ||
| image: nginx | ||
| resources: | ||
| requests: | ||
| cpu: "4000m" | ||
| limits: | ||
| cpu: "4000m" | ||
| ports: | ||
| - name: web | ||
| containerPort: 80 | ||
| protocol: TCP |
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| module github.com/tektoncd/experimental/scheduler | ||
|
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| go 1.13 | ||
|
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| require ( | ||
| k8s.io/api v0.18.0 | ||
| k8s.io/apimachinery v0.18.0 | ||
| k8s.io/apiserver v0.18.0 | ||
| k8s.io/client-go v0.18.0 | ||
| k8s.io/klog v1.0.0 | ||
| k8s.io/kubernetes v1.18.0 | ||
| ) | ||
|
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| replace ( | ||
| k8s.io/api => k8s.io/api v0.18.0 | ||
| k8s.io/apiextensions-apiserver => k8s.io/apiextensions-apiserver v0.18.0 | ||
| k8s.io/apimachinery => k8s.io/apimachinery v0.18.0 | ||
| k8s.io/apiserver => k8s.io/apiserver v0.18.0 | ||
| k8s.io/cli-runtime => k8s.io/cli-runtime v0.18.0 | ||
| k8s.io/client-go => k8s.io/client-go v0.18.0 | ||
| k8s.io/cloud-provider => k8s.io/cloud-provider v0.18.0 | ||
| k8s.io/cluster-bootstrap => k8s.io/cluster-bootstrap v0.18.0 | ||
| k8s.io/code-generator => k8s.io/code-generator v0.18.0 | ||
| k8s.io/component-base => k8s.io/component-base v0.18.0 | ||
| k8s.io/cri-api => k8s.io/cri-api v0.18.0 | ||
| k8s.io/csi-translation-lib => k8s.io/csi-translation-lib v0.18.0 | ||
| k8s.io/kube-aggregator => k8s.io/kube-aggregator v0.18.0 | ||
| k8s.io/kube-controller-manager => k8s.io/kube-controller-manager v0.18.0 | ||
| k8s.io/kube-proxy => k8s.io/kube-proxy v0.18.0 | ||
| k8s.io/kube-scheduler => k8s.io/kube-scheduler v0.18.0 | ||
| k8s.io/kubectl => k8s.io/kubectl v0.18.0 | ||
| k8s.io/kubelet => k8s.io/kubelet v0.18.0 | ||
| k8s.io/legacy-cloud-providers => k8s.io/legacy-cloud-providers v0.18.0 | ||
| k8s.io/metrics => k8s.io/metrics v0.18.0 | ||
| k8s.io/sample-apiserver => k8s.io/sample-apiserver v0.18.0 | ||
| ) |
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