helpers.go

Documentation: k8s.io/kubernetes/pkg/kubelet/cm

     1  /*
     2  Copyright 2018 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package cm
    18  
    19  import (
    20  	"context"
    21  
    22  	"k8s.io/api/core/v1"
    23  	"k8s.io/apimachinery/pkg/util/sets"
    24  	internalapi "k8s.io/cri-api/pkg/apis"
    25  	runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1"
    26  	"k8s.io/klog/v2"
    27  	"k8s.io/kubernetes/pkg/kubelet/cm/containermap"
    28  	evictionapi "k8s.io/kubernetes/pkg/kubelet/eviction/api"
    29  )
    30  
    31  // hardEvictionReservation returns a resourcelist that includes reservation of resources based on hard eviction thresholds.
    32  func hardEvictionReservation(thresholds []evictionapi.Threshold, capacity v1.ResourceList) v1.ResourceList {
    33  	if len(thresholds) == 0 {
    34  		return nil
    35  	}
    36  	ret := v1.ResourceList{}
    37  	for _, threshold := range thresholds {
    38  		if threshold.Operator != evictionapi.OpLessThan {
    39  			continue
    40  		}
    41  		switch threshold.Signal {
    42  		case evictionapi.SignalMemoryAvailable:
    43  			memoryCapacity := capacity[v1.ResourceMemory]
    44  			value := evictionapi.GetThresholdQuantity(threshold.Value, &memoryCapacity)
    45  			ret[v1.ResourceMemory] = *value
    46  		case evictionapi.SignalNodeFsAvailable:
    47  			storageCapacity := capacity[v1.ResourceEphemeralStorage]
    48  			value := evictionapi.GetThresholdQuantity(threshold.Value, &storageCapacity)
    49  			ret[v1.ResourceEphemeralStorage] = *value
    50  		}
    51  	}
    52  	return ret
    53  }
    54  
    55  func buildContainerMapAndRunningSetFromRuntime(ctx context.Context, runtimeService internalapi.RuntimeService) (containermap.ContainerMap, sets.Set[string]) {
    56  	podSandboxMap := make(map[string]string)
    57  	podSandboxList, _ := runtimeService.ListPodSandbox(ctx, nil)
    58  	for _, p := range podSandboxList {
    59  		podSandboxMap[p.Id] = p.Metadata.Uid
    60  	}
    61  
    62  	runningSet := sets.New[string]()
    63  	containerMap := containermap.NewContainerMap()
    64  	containerList, _ := runtimeService.ListContainers(ctx, nil)
    65  	for _, c := range containerList {
    66  		if _, exists := podSandboxMap[c.PodSandboxId]; !exists {
    67  			klog.InfoS("No PodSandBox found for the container", "podSandboxId", c.PodSandboxId, "containerName", c.Metadata.Name, "containerId", c.Id)
    68  			continue
    69  		}
    70  		podUID := podSandboxMap[c.PodSandboxId]
    71  		containerMap.Add(podUID, c.Metadata.Name, c.Id)
    72  		if c.State == runtimeapi.ContainerState_CONTAINER_RUNNING {
    73  			klog.V(4).InfoS("Container reported running", "podSandboxId", c.PodSandboxId, "podUID", podUID, "containerName", c.Metadata.Name, "containerId", c.Id)
    74  			runningSet.Insert(c.Id)
    75  		}
    76  	}
    77  	return containerMap, runningSet
    78  }
    79
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