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https://github.com/kubernetes/kubernetes/pull/74737 introduced a new in-memory map for the dockershim, that could potentially (in pathological cases) cause memory leaks - for containers that use GMSA cred specs, get created successfully, but then never get started nor removed. This patch addresses this issue by making container removal fail altogether when platform-specific clean ups fail: this allows clean ups to be retried later, when the kubelet attempts to remove the container again. Resolves issue https://github.com/kubernetes/kubernetes/issues/74843. Signed-off-by: Jean Rouge <rougej+github@gmail.com>
48 lines
1.9 KiB
Go
48 lines
1.9 KiB
Go
// +build !windows
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/*
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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 dockershim
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import (
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dockertypes "github.com/docker/docker/api/types"
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runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
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)
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type containerCleanupInfo struct{}
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// applyPlatformSpecificDockerConfig applies platform-specific configurations to a dockertypes.ContainerCreateConfig struct.
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// The containerCleanupInfo struct it returns will be passed as is to performPlatformSpecificContainerCleanup
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// after either the container creation has failed or the container has been removed.
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func (ds *dockerService) applyPlatformSpecificDockerConfig(*runtimeapi.CreateContainerRequest, *dockertypes.ContainerCreateConfig) (*containerCleanupInfo, error) {
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return nil, nil
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}
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// performPlatformSpecificContainerCleanup is responsible for doing any platform-specific cleanup
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// after either the container creation has failed or the container has been removed.
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func (ds *dockerService) performPlatformSpecificContainerCleanup(cleanupInfo *containerCleanupInfo) (errors []error) {
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return
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}
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// platformSpecificContainerInitCleanup is called when dockershim
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// is starting, and is meant to clean up any cruft left by previous runs
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// creating containers.
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// Errors are simply logged, but don't prevent dockershim from starting.
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func (ds *dockerService) platformSpecificContainerInitCleanup() (errors []error) {
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return
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}
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