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63 lines
2.3 KiB
Go
63 lines
2.3 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package testing
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import (
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"fmt"
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v1 "k8s.io/api/core/v1"
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)
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type keyVal struct {
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k string
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v string
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}
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// MakeNodesAndPodsForEvenPodsSpread serves as a testing helper for EvenPodsSpread feature.
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// It builds a fake cluster containing running Pods and Nodes.
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// The size of Pods and Nodes are determined by input arguments.
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// The specs of Pods and Nodes are generated with the following rules:
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// - Each generated node is applied with a unique label: "node: node<i>".
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// - Each generated node is applied with a rotating label: "zone: zone[0-9]".
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// - Depending on the input labels, each generated pod will be applied with
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// label "key1", "key1,key2", ..., "key1,key2,...,keyN" in a rotating manner.
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func MakeNodesAndPodsForEvenPodsSpread(labels map[string]string, existingPodsNum, allNodesNum, filteredNodesNum int) (existingPods []*v1.Pod, allNodes []*v1.Node, filteredNodes []*v1.Node) {
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var labelPairs []keyVal
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for k, v := range labels {
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labelPairs = append(labelPairs, keyVal{k: k, v: v})
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}
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zones := 10
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// build nodes
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for i := 0; i < allNodesNum; i++ {
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node := MakeNode().Name(fmt.Sprintf("node%d", i)).
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Label(v1.LabelTopologyZone, fmt.Sprintf("zone%d", i%zones)).
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Label(v1.LabelHostname, fmt.Sprintf("node%d", i)).Obj()
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allNodes = append(allNodes, node)
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}
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filteredNodes = allNodes[:filteredNodesNum]
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// build pods
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for i := 0; i < existingPodsNum; i++ {
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podWrapper := MakePod().Name(fmt.Sprintf("pod%d", i)).Node(fmt.Sprintf("node%d", i%allNodesNum))
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// apply labels[0], labels[0,1], ..., labels[all] to each pod in turn
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for _, p := range labelPairs[:i%len(labelPairs)+1] {
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podWrapper = podWrapper.Label(p.k, p.v)
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}
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existingPods = append(existingPods, podWrapper.Obj())
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}
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return
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}
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