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https://github.com/kubernetes-sigs/descheduler.git
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5bf11813e6
In some cases it might be usefull to limit how many evictions per a domain can be performed. To avoid burning the whole per descheduling cycle budget. Limiting the number of evictions per node is a prerequisite for evicting pods whose usage can't be easily subtracted from overall node resource usage to predict the final usage. E.g. when a pod is evicted due to high PSI pressure which takes into account many factors which can be fully captured by the current predictive resource model.
117 lines
3.4 KiB
Go
117 lines
3.4 KiB
Go
/*
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Copyright 2017 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 api
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import (
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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)
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// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
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type DeschedulerPolicy struct {
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metav1.TypeMeta
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// Profiles
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Profiles []DeschedulerProfile
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// NodeSelector for a set of nodes to operate over
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NodeSelector *string
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// MaxNoOfPodsToEvictPerNode restricts maximum of pods to be evicted per node.
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MaxNoOfPodsToEvictPerNode *uint
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// MaxNoOfPodsToEvictPerNamespace restricts maximum of pods to be evicted per namespace.
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MaxNoOfPodsToEvictPerNamespace *uint
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// MaxNoOfPodsToTotal restricts maximum of pods to be evicted total.
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MaxNoOfPodsToEvictTotal *uint
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// EvictionFailureEventNotification should be set to true to enable eviction failure event notification.
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// Default is false.
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EvictionFailureEventNotification *bool
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// MetricsCollector configures collection of metrics about actual resource utilization
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MetricsCollector MetricsCollector
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// GracePeriodSeconds The duration in seconds before the object should be deleted. Value must be non-negative integer.
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// The value zero indicates delete immediately. If this value is nil, the default grace period for the
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// specified type will be used.
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// Defaults to a per object value if not specified. zero means delete immediately.
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GracePeriodSeconds *int64
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}
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// Namespaces carries a list of included/excluded namespaces
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// for which a given strategy is applicable
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type Namespaces struct {
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Include []string `json:"include,omitempty"`
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Exclude []string `json:"exclude,omitempty"`
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}
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// EvictionLimits limits the number of evictions per domain. E.g. node, namespace, total.
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type EvictionLimits struct {
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// node restricts the maximum number of evictions per node
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Node *uint `json:"node,omitempty"`
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}
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type (
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Percentage float64
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ResourceThresholds map[v1.ResourceName]Percentage
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)
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type PriorityThreshold struct {
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Value *int32 `json:"value"`
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Name string `json:"name"`
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}
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type DeschedulerProfile struct {
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Name string
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PluginConfigs []PluginConfig
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Plugins Plugins
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}
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type PluginConfig struct {
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Name string
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Args runtime.Object
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}
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type Plugins struct {
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PreSort PluginSet
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Sort PluginSet
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Deschedule PluginSet
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Balance PluginSet
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Filter PluginSet
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PreEvictionFilter PluginSet
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}
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type PluginSet struct {
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Enabled []string
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Disabled []string
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}
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// MetricsCollector configures collection of metrics about actual resource utilization
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type MetricsCollector struct {
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// Enabled metrics collection from kubernetes metrics.
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// Later, the collection can be extended to other providers.
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Enabled bool
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}
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// ReferencedResourceList is an adaption of v1.ResourceList with resources as references
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type ReferencedResourceList = map[v1.ResourceName]*resource.Quantity
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