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88 lines
2.7 KiB
Go
88 lines
2.7 KiB
Go
/*
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Copyright 2014 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 container
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import (
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"fmt"
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"time"
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"k8s.io/klog/v2"
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)
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// GCPolicy specifies a policy for garbage collecting containers.
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type GCPolicy struct {
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// Minimum age at which a container can be garbage collected, zero for no limit.
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MinAge time.Duration
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// Max number of dead containers any single pod (UID, container name) pair is
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// allowed to have, less than zero for no limit.
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MaxPerPodContainer int
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// Max number of total dead containers, less than zero for no limit.
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MaxContainers int
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}
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// GC manages garbage collection of dead containers.
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//
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// Implementation is thread-compatible.
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type GC interface {
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// Garbage collect containers.
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GarbageCollect() error
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// Deletes all unused containers, including containers belonging to pods that are terminated but not deleted
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DeleteAllUnusedContainers() error
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}
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// SourcesReadyProvider knows how to determine if configuration sources are ready
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type SourcesReadyProvider interface {
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// AllReady returns true if the currently configured sources have all been seen.
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AllReady() bool
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}
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// TODO(vmarmol): Preferentially remove pod infra containers.
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type realContainerGC struct {
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// Container runtime
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runtime Runtime
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// Policy for garbage collection.
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policy GCPolicy
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// sourcesReadyProvider provides the readiness of kubelet configuration sources.
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sourcesReadyProvider SourcesReadyProvider
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}
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// NewContainerGC creates a new instance of GC with the specified policy.
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func NewContainerGC(runtime Runtime, policy GCPolicy, sourcesReadyProvider SourcesReadyProvider) (GC, error) {
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if policy.MinAge < 0 {
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return nil, fmt.Errorf("invalid minimum garbage collection age: %v", policy.MinAge)
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}
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return &realContainerGC{
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runtime: runtime,
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policy: policy,
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sourcesReadyProvider: sourcesReadyProvider,
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}, nil
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}
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func (cgc *realContainerGC) GarbageCollect() error {
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return cgc.runtime.GarbageCollect(cgc.policy, cgc.sourcesReadyProvider.AllReady(), false)
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}
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func (cgc *realContainerGC) DeleteAllUnusedContainers() error {
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klog.Infof("attempting to delete unused containers")
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return cgc.runtime.GarbageCollect(cgc.policy, cgc.sourcesReadyProvider.AllReady(), true)
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}
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